Sampling & Sample Preparation For Quality Control Sampling: M&W Jawo Handling provide samplers either selected for our wide range of standard samplers or specially designed for client applications. Sample preparation: M&W Jawo Handling provide a full range of equipment for sample preparation, this includes several crushers and mills, sample dividers, mixers as well as equipment for sample transportation. M&W JAWO Handling AS 1. Representative Sampling Systems 2. Samplers 3. Dividers 4. Dividing Plants 5. Crushers 6. Accessories 7. Sampler Systems for Biomass 8. Conveyors 9. Questionnaire 10. Sampling Theory M&W JAWO Handling AS Oldenvej 5 3490 Kvistgaard Tel.: +45 49139822 Fax: +45 49139162 [email protected] www.m-w.dk REPRESENTATIVE SAMPLING SYSTEMS FOR BULK MATERIALS M&W JAWO HANDLING T HE MARK & W EDELL SAMPLING SYSTEMS TYPICAL SAMPLING SYSTEM P ROCESS DIAGRAM Knowledge of the properties of bulk material: • • • • • • • Content of prime property Moisture content Hardness Content of minerals Content of contamination Size distribution And many other properties 2 1 3 are essential when controlling the quality of the material. The properties are identified by taking statistically representativ e samples from each batch of material. 4 The Mark & Wedell Sampling System is an integrated part of the control system available to the operators. The Sampling System provides the operator with the means for executing the extraction and preparation of representative samples of the material. 5 The sample size is suitable for making laboratory analysis. 6 The Mark & Wedell Sampling Systems operate in accordance with approved international standards. 7 8 The results of the laboratory tests performed on the basis of the representative samples prepared by the sampling system are used for: • Calculating the value or payment due for each batch of material supplied. • Adjusting down stream production. • Calculating the amount of by-products from each batch. • Calculating the pollution from each • Calculating the blending of various material batches to obtain maximum end product. 9 10 DIAGRAM LEGEND: 1.Conveyor 7.Buffer container 2.Cross belt bucket sampler 8.Feeding belt 3.Feeding belt 9.Rotary tube divider 4.Chrusher 10.Sample bottles 5.Rotary tube divider 11.Reject material 6.Bias valve conveyor 11 SAMPLING SCHEDULE: In order to verify the material properties for a given material lot it is necessary to take out a number u of sampling units. This number depends on the mass of the lot and on the desired overall sampling precision. Minimum requirements are listed in Table 1. Each sampling unit is taken by the sampling equipment as n increments, where n should be 10 or more. Mass of Lot tonnes < 5.000 5.001 – 20.000 20.001 – 45.000 45.001 – 80.000 80.001 – 125.000 125.001 – 180.000 180.001 – 245.000 No. of sampling units 1 2 3 4 5 6 7 The properties of the materal lot can be determined with an overall precision PL using equation 1 where: • VPT is variance of sample preparation and test. If no data available: assume 0.2 • VI is the variance of primary increment. If no data available: assume 20 The overall precision is a function of the number of sampling units u, the variance of sample preparation and test VPT, the number of increments n and the variance of the increments VI. If a given precision PL is required the number of increments n and the number of sampling units u can be found using Equation 2 and 3 respectively. TABLE 1 PL VI = ±2 n + VPT u EQUATION 1 n = 4VI − 4VPT 2 L uP EQUATION 2 u = The values n and u are adjusted upwards and recalculated to a convenient combination respecting the required minimum values. 4VI + 4n1VPT n1PL2 EQUATION 3 EQUIPMENT SIZING CONSIDERATIONS: The mass of each primary increment can be calculated using Equation 4 where: • C is flow rate [t/h] on conveyor belt. • A is cutting aperture [mm]. Should be / 3 times the nominal top size of material. • S is cutter speed [m/s]. If S is constant the incremental mass is a function of the flow rate C, the nominal top size of the lumps and cutting aperture A. As a guideline for lay-out of sampling systems the reference increment mass from Table 2 should be used as minimum values. The total mass of the sample (sampling unit) is at least n times the increment mass where n is at least 10 as previously discussed. SAMPLE DIVISION: To obtain convenient sample masses, the sample is divided into a number of statistically identical but smaller samples and a rest which is returned to the conveyor. From the preceeding section is seen, that reducing the mass needs a reduction in particle size is required in order to preserve the representative nature of the sample. For this reason a system for extraction of representative samples of materials consists of multistage extraction, particle reduction and division equipment. m = C ⋅ A ⋅ 10 −3 [kg ] 3,6 ⋅ S EQUATION 4 Nominal top size mm 300 200 150 125 90 63 45 31,5 22,4 16,0 11,2 8,0 Reference incr. Mass Kg 100 25 15 10 5 3 2 1 0,75 0,50 0,25 0,15 TABLE 2 The Company and its product line M&W is an internationally working engineering company specialized in the design, manufacturing and supply of sampling systems for all type of bulk materials for quality control, optimising processes and controlling by-products in installations world-wide. M&W ’s product line • • • • • • Sampling Systems Modular Sampling Systems Samplers Dividers Crushers Accessories Member of the Mark & Wedell Group - Oldenvej 5, DK-3490 Kvistgaard, Denmark Tel.: +45 49 13 98 22 Fax:+45 49 13 91 62 - Internet: www.m-w.dk E-mail: [email protected] CROSS BELT HAMMER SAMPLER TYPE HP The Cross Belt Hammer Sampler suits the purpose of taking representative samples of granular material being conveyed on a belt conveyor. Representability of the sample is ensured by taking a complete cross section of the material on the conveyor belt. The Hammer Sampler is suited for granulated material, and offers high flexibility in place of installation anywhere along the conveyor belt. The Hammer Sampler principle is compatible with all internationally applicable standards for sampling. Basic Functionality The cutting device is the hollow head of the hammer. When a sample is taken the hammer sweeps one revolution across the conveyor whereby the hammerhead cuts through the material stream on the belt. The sample is thereby captured by the hollow hammerhead, which in turn is emtied over the sample outlet. The hammer is actuated by an electric motor with integrated brake designed to accelerate and decelerate the hammer and return it to its parking position safely away from the material stream. To reduce the dynamic effects on the supports, the hammer is forseen with counterweights. The hammer samplers rotation is controlled by an electronic control unit. M&W JAWO HANDLING The nominal size of the hammer sampler is chosen corresponding to the width of the conveyor belt, so the HP1200 is for use on a 1200mm wide conveyor belt. Cross Belt Hammer Sampler: A (mm) B (mm) C (mm) HP 500 HP 650 HP 800 HP 1000 HP 1200 HP 1400 HP 1600 HP 1800 HP 2000 HP 2200 1300 1500 1750 2050 2350 2650 2950 3250 3550 3850 950 1150 1350 1600 1850 2150 2400 2650 2900 3150 1800-2450 1950-2650 2150-2800 2350-3000 2550-3250 2750-3450 2950-3650 3150-3900 3350-4100 3550-4300 The dimension in the direction along the conveyor belt, depends on the specific project data for particle size, cut size, and motor type. Member of the Mark & Wedell Group - Oldenvej 5, DK-3490 Kvistgaard, Denmark Tel.: +45 49 13 98 22 Fax:+45 49 13 91 62 - Internet: www.m-w.dk E-mail: [email protected] CROSS BELT BUCKET SAMPLER TYPE CBBS The Bucket Sampler Type CBBS is designed to take out a representative sample of powdered material and lumps up to 100 mm, from a free falling flow of materials. General Description: The Bucket Sampler Type CBBS consists of a cutter attached to a carriage running on a double rail system. The carriage is driven by an electric motor via two roller chains. The cutter is individually selected based on layout conditions, size of sample and maximum particle size. An additional supporting beam with rail can be added, depending on cutter design. The sampling can be based on tangential or vertical vectors of the material flow and the degree of admission is chosen so that overloading does not occur while the cutter passes through the material flow. The cutter is available in S235 JRG2 or stainless steel depending on the material to be sampled. The cutter is mechanically opened/closed outside the material flow for sample discharge into a hopper. The resting position of the cutter between two samples is outside the material flow. M&W JAWO HANDLING A 850 B SAMPLER TYPE CBBS 500 CBBS 650 CBBS 800 CBBS 1000 CBBS 1200 CBBS 1400 CBBS 1600 A: Total length mm 2500 2650 2800 3000 3200 3400 3600 B: Travel distance mm 1700 1850 2000 2200 2400 2600 2800 Weight Kg 220 229 238 250 262 275 286 The cutter is individually designed based on layout conditions, particle size, required sample size, etc. Cutter Type: Slot width: (SP) Speed: (V) Net. volume: (N) ST (tangential) 3 x max particle size Max 0.8 m/sec SL (vertical) 3 x max particle size Max 0.8 m/sec N=Q*SP*X 3.6*V N=Q*SP*X 3.6*V where N is cutter volume in litres, Q is material flow in m3/h, SP is slot width in m and V, is cutter speed in m/s. Member of the Mark & Wedell Group - Oldenvej 5, DK-3490 Kvistgaard, Denmark Tel.: +45 49 13 98 22 Fax:+45 49 13 91 62 - Internet: www.m-w.dk E-mail: [email protected] CHUTE SAMPLER TYPE FP The Chute Sampler Type FP is designed to take out increments of none-sticky powdered material and lumps up to 40 mm, in a closed pipe system, from a free falling flow of materials. General Description: The sampler is driven by a geared motor and toothed V-belt drive. A specially designed cutter rotates around a vertical axis. The cutter inlet is designed so that the full cross section of the material flow is cut through during one rotation, and further is shaped so that all particles from any part of the cross section have the same probability of being sampled i.e.: a representative sample is taken. The sample is extracted into a chute where a tight fitting sample bottle can be mounted, or it falls by gravity in a chute to further sample preparation. An inspection hatch is provided on top of the sampler body. The sampler cutter is parked well away from the material stream, when no sample is taken. The cutter is available in stainless steel or wear resistant material. The body is manufactured from mild steel plate. The control of the sampler is normally conducted from a local control system, which can be connected to a central PLC-system. M&W JAWO HANDLING The sampler can be mounted in a vertical chute, either circular or rectangular. Drive: Type: Voltage: Type: FP FP FP FP 100 200 300 500 Helical geared motor and toothed V-belt drive 3 x 400 V, 50 Hz Particle Size mm Max. 10 Max. 15 Max. 25 Max. 40 A mm B mm C mm Do mm ø/? 100 ø/? 200 ø/? 300 ø/? 500 800 1050 1310 1790 600 800 900 1200 ø 470 ø 720 ø 940 ø 1420 Motor Speed kW m/s 0.25 0.25 0.37 0.55 0.6 0.6 0.6 0.6 Wgt kg 55 80 120 140 Member of the Mark & Wedell Group - Oldenvej 5, DK-3490 Kvistgaard, Denmark Tel.: +45 49 13 98 22 Fax:+45 49 13 91 62 - Internet: www.m-w.dk E-mail: [email protected] CHUTE SAMPLER TYPE FPMX The Chute Sampler Type FPMX is designed to take out increments of non-sticky powdered material and lumps up to 40 mm, in a closed pipe system, from a free falling flow of materials and collecting these in a mixing tank for establishment of mean samples. General Description: The sampler is driven by a geared motor and toothed V-belt drive. A specially designed spoon rotates around a vertical axis. The spoon inlet is designed so that the full cross section of the material flow is cut through during one rotation, and is further shaped so that all particles from any part of the cross section have the same probability of being sampled i.e.: a representative sample is taken. The samples are collected in a mixing tank, where they are homogenized. Samples can be discharged manually or automatically from the mixing tank. By manual discharging, the mixed sample is collected in a beaker (approximate volume 1.4 litres) and afterwards the mixing tank is emptied through a manually operated bottom gate. By automatic discharging, a hydraulic operated bottom gate empties the mixer tank into a chute where additional equipment like dosing unit and automatic tube post receiving/sending station can be installed for further handling of the samples. This system design ensures, that the material at any time present in the mixer tank will represent a true and representative average of the material having passed the sampler, since last emptying of the mixer tank. An inspection hatch is provided on top of the chute sampler body. The sampling spoon is parked well away from the material stream, when no sample is taken. The spoon is available in stainless steel or wear resistant material. The body is manufactured from mild steel plate. The control of the sampler and hydraulic operated bottom gate is normally operated from a central PLC-system. M&W JAWO HANDLING The sampler can be mounted in a vertical chute, either circular or rectangular. Drive: Sampler: Mixer: Outlet mixer: Voltage: Type: FP 100 FP 200 FP 300 FP 500 Type: Helical geared motor and toothed V-belt drive. Type: 0.55 kW geared motor, 4 pole, 36 rpm. Type: Hydraulic actuator. 3 x 400 V, 50 Hz. Particle size mm. Max. 10 Max. 15 Max. 25 Max. 40 A mm Ø/! 100 Ø/! 200 Ø/! 300 Ø/! 500 B mm 800 1050 1310 1790 C mm 600 800 900 1200 D0 mm ø 470 ø 720 ø 940 ø 1420 Motor kW 0.25 0.25 0.37 0.55 Speed m/s 0.6 0.6 0.6 0.6 Wgt m/s 55 80 120 140 Member of the Mark & Wedell Group - Oldenvej 5, DK-3490 Kvistgaard, Denmark Tel.: +45 49 13 98 22 Fax:+45 49 13 91 62 - Internet: www.m-w.dk E-mail: [email protected] Screw Sampler Type SMX SMX with automatic discharge Optionally: SMX made of stainless steel The Screw Sampler Type SMX is designed to create an average sample from continuous extraction of dry, non-sticky powdered material from a free falling flow of materials. General Description: The continuously operating sampler is driven by a geared motor, coupled to a transport screw crossing the flow of material. The screw transports the extracted material to a mixing tank, where it is homogenized by mixer wings connected to the through going screw conveyor shaft. The sampler can be delivered with the drive unit installed next to the mixing tank (Type SMX-A500RM) or for installation on the opposite side of the chute (Type SMX-A500R-S). The mixed test sample is extracted manually (SMX-M500R-M) from the mixing tank into a beaker (volume approx. 1.4 litres) and the mixing tank content is manually discharged afterwards. This mixer design ensures, that the material at any time present in the mixer tank will represent a true average of the material having passed the sampler, since the mixing tank was last emptied. The mixing tank is provided with an observation window and has an overflow to safeguard against overfilling. Excess sample material is returned to the main material stream by gravity. The standard SMX sampler is not suited for installation in pressure systems. As an option the screw sampler can be provided with a pneumatic cylinder for automatic discharge (SMX-A500R-M) of the mixer tank content into the reject chute, where optional equipment like dosing unit for automatic tube post sending/receiving station can be installed. For special purposes the SMX sampler can be provided with variable speed drive. M&W JAWO HANDLING A ~1110 ~690 560 132 235 max.30E E The SMX sampler can be mounted in a chute with max. 30º inclination, either rectangular or circular. Standard outside chute dimensions: A = 250, 315, 355, 400, 450, 500, 560, 630 or 710 mm. Main dimensions: Total length: A + 1245 mm Screw diameter: ø 50 mm Mixing tank volume: ~ 25 l (effective) Flange, outlet mixing tank: 280 x 280 mm Weight: App. 90 kg Drive: Type: Helical geared motor Voltage: 3 x 400 V, 50 Hz Power: 0.18 kW Speed: 10 rpm Coupling: Elasto rotative Pneumatics: (for automatic discharging only). Type: Double acting cylinder Pressure: Min. 5 bar, max. 10 bar Quality: Dry and oil free Consumption: Minimal Signal: Type: REED-Switch Voltage: AC: Max. 240 V, max. 50 VA, max. 5000 mA DC: Max. 300 V, max. 50 W Member of the Mark & Wedell Group - Oldenvej 5, DK-3490 Kvistgaard, Denmark Tel.: +45 49 13 98 22 Fax:+45 49 13 91 62 - Internet: www.m-w.dk E-mail: [email protected] SCREW SAMPLER TYPE SCR Screw Sampler Type SCR The Screw Sampler Type SCR is designed for sample extraction of dry, non-sticky powdered material from a free falling flow of materials. General Description: The sampler is driven by a geared motor coupled to a transport screw, crossing the flow of material. The screw transports the extracted material to a discharge outlet chute where the material falls by gravity to the subsequent sample preparation equipment. The screw sampler is equipped with an inductive motion detector. The screw sampler type designation is based on chute dimension in mm as well as chute form. The screw sampler can be mounted in chutes (rectangular SCR-XXXR or circular SCR-XXXC) with maximum inclination of 30º. The control of the sampler is normally conducted from a central PLC system. As an option, the screw sampler can be equipped with variable speed geared motor. M&W JAWO HANDLING The Company and its product line M&W is an internationally working engineering company specialized in the design, manufacturing and supply of sampling systems for all type of bulk materials for quality control, optimising processes and controlling by-products in installations world-wide. M&W ’s product line • • • • • • Sampling Systems Modular Sampling Systems Samplers Dividers Crushers Accessories Member of the Mark & Wedell Group - Oldenvej 5, DK-3490 Kvistgaard, Denmark Tel.: +45 49 13 98 22 Fax:+45 49 13 91 62 - Internet: www.m-w.dk E-mail: [email protected] AIR SLIDE SAMPLER TYPE AS M&W Jawo Handling The Air Slide Sampler Type AS is designed for continuous or intermittent sample extraction of dry, non-sticky powdered material flowing in air slides. The AS sampler can be installed in any existing air slide within a couple of hours. General Description: The AS sampler has a rotating tube provided with a 4 mm longitudinal slot. The tube is fastened in the hollow axle gear in that way the extracted sample will fall directly into the sample bottle. By intermittent sample extraction the rotating tube is parked between the sampling period, with the slot into the protective guard (opposite the material flow). The AS sampler is provided with an inductive sensor acting as combined speed monitor and position indicator. The AS sampler is manufactured from stainless steel AISI 304. The AS sampler is designed for working in a non-condensed environment. M&W JAWO HANDLING Principle Sketch: Air Slide Sample Container Drive: Type: Voltage: Power: Speed: Sampler Type A (mm) B (mm) AS 200/400 AS 400/600 AS 600/800 200 – 315 315 – 350 350 – 450 To be informed by the client! To be informed by the client! To be informed by the client! Worm geared motor with brake. 3 x 400 / 230 V, 50 Hz 0.25 kW 192 rpm Extraction Capacity: Approximately 1 litre/minute at 500 t/h air slide capacity and continuous operation, however, subject to material velocity and degree of filling. Member of the Mark & Wedell Group - Oldenvej 5, DK-3490 Kvistgaard, Denmark Tel.: +45 49 13 98 22 Fax:+45 49 13 91 62 - Internet: www.m-w.dk E-mail: [email protected] PSS 2200 Powder Sampling System AUTOMATIZING QUALITY ASSURANCE FOR POWDERS M&W JAWO HANDLING Functionality and application fields for PSS 2200 The PSS 2200 automatizes sampling and registration of samples for powders. As such the PSS forms part of a quality assurance system for powders conveyed pneumatically in closed piping. Obvious sites for installation are at silo outlets or in the pipes for loading or unloading from powder transport vehicles where the powder changes hands. 1. Identification The transporter checks in to the system using a magnetic card. The card reader is located besides the control panel. The system also read the identity barcode of the sample bottle to be used for the representative sample. 2. Sampling From the probe mounted in the transport pipe a side stream is conducted to the sample preparation section of the PSS. Here the individual sample increments, cuts, are measured and stored in the sample container. Cutting is done on a time basis. 3. Registration The combination of data for transporter ID, sample bottle ID, sampling period and number of sample increments are sent to the plant quality registration computer database for combination with other relevant data. When the next transporter checks in, the system will select the next available sampling bottle. Media Dry, nonsticky non-food powder. Extraction is possible from pneumatic transport lines or from silos/hoppers. Handles powders of flyash, cement, limestone. Operating conditions Temperature: < 80°C. Dewpoint < 45°C Pressure < 3bar/43psi (5bar/70psi in transients) Particle size ø1mm (Nominal top size) Sampling strings: Number of sample strings: 5 Sample increment (cut): 100cm3 or 200 cm3 Sample bottle volume: 2500 cm3 Advantages of PSS 2200 ▪ Secure link between transporter ID and sample ID ▪ Transfer of data to quality registration database ▪ Automatic sampling ▪ Require a minimum of manual attention ▪ Proven sampling technology System unit Stainless Steel enclosure with IP57 rating. Control panel is protected with transparent dust and watertight cover. Power supply: 230V/50Hz or 115V/60Hz Connection to compressed instrument air 6bar/ 70psi. Overall size (WxHxD): 240cmx220cmx60cm Weight: 450 kg Member of the Mark & Wedell Group - Oldenvej 5, DK-3490 Kvistgaard, Denmark Tel.: +45 49 13 98 22 Fax:+45 49 13 91 62 - Internet: www.m-w.dk E-mail: [email protected] ROTARY TUBE DIVIDER TYPE PD Rotary Tube Divider Type PD-12/100-1 The Rotary Tube Divider is used for dividing samples of bulk materials. The main advantage of mechanical sample dividers is that, they extract a part of the material by a large number of increments. If, less than about, 50 increments are taken by the sample divider, the accuracy may be substantially reduced. A continuous automatic sample division ensures, that the divided sample is still a representative sample. General Description: The dividing tube is rotated by the drive unit. The material is charged through the dividing tube, which passes respectively extractor and discharge cone. The division ratio is step less adjustable. Depending upon model size, it is possible to divide materials up to a particle size of ø65 mm. Dividing ratio = slot opening/(division circumference – slot opening) The Rotary Tube Divider consists essentially of following units: • Drive unit (gear motor and belt) • Dividing Tube of stainless steel • Top cone with inspection/cleaning opening • Stainless steel discharge cone with reject outlet and one or more sample outlets M&W JAWO HANDLING C DO A dR dS E Drive: Voltage: Helical geared motor V-belt drive 3 x 400 V, 50 Hz Type Max part. size mm. øA mm B Mm C mm øDo mm ds mm ødR mm E mm Motor kW PD 8/50 PD 8/100 PD 12/100 PD 12/200 PD 17/100 PD 17/200 PD 27/100 PD 27/200 15 25 35 40 35 50 35 65 50 100 100 200 100 200 100 200 515 535 810 810 1035 1035 1515 1515 625 625 925 925 925 925 925 925 410 410 640 640 740 740 1110 1110 60x60 60x60 60x60 150x150 60x60 150x150 100x100 150x150 100 100 200 200 200 200 200 200 170 170 260 260 330 330 600 600 0.25 0.25 0.25 0.25 0.37 0.37 0.55 0.55 Div. Circ. mm 825 825 1255 1255 1720 1720 2700 2700 Tube rpm Wgt kg 44 44 29 29 21 21 13 13 50 55 70 80 120 130 170 175 Member of the Mark & Wedell Group - Oldenvej 5, DK-3490 Kvistgaard, Denmark Tel.: +45 49 13 98 22 Fax:+45 49 13 91 62 - Internet: www.m-w.dk E-mail: [email protected] DISC DIVIDER TYPE DD The Disc Divider is used for dividing samples of powder and bulk materials (even suitable for wet materials). The main advantage of mechanical sample dividers is that they extract a part of the material by a large number of increments. If less than about 50 increments are taken by the sample divider, the accuracy may be substantially reduced. A continuous automatic sample division ensures that the divided sample is still a representative sample. General Description: The sample has to be delivered on the top cone of the Disc Divider. The sample will be scraped from the upper disc to the lower disc, where it will be scraped to the bottom cone, where a part will go through the sample outlet(s) and the rest will fall through the bottom cone as reject. The division ratio is step-less adjustable between 1:9 and 1:59 – Depending on particle size and upon model size. It is possible to divide materials up to a particle size of ø65 mm. The Disc Divider consists essentially of the following units: • Drive unit (gear motor). • Upper and lower discs with scrapers. • Upper part with inspection/cleaning openings. • Lower part with reject outlet and one or more sample outlets. M&W JAWO HANDLING Principle Sketch: Member of the Mark & Wedell Group - Oldenvej 5, DK-3490 Kvistgaard, Denmark Tel.: +45 49 13 98 22 Fax:+45 49 13 91 62 - Internet: www.m-w.dk E-mail: [email protected] RIFFLE DIVIDER TYPE RF The Riffle Divider Type RF is designed for manual representative dividing of dry, granulated and powdered sample material. General Description: The Riffle Dividers, type RF are used for the easy dividing and reduction of bulk material samples with particle sizes ranging from less than 1 mm up to a maximum of 10 mm. After a representative sample extraction has been effected, further reduction is the major prerequisite for exact analysis results in accordance with the characteristics of the bulk quantity. Due to its special sampling method, the Riffle Dividers provide an accuracy which is superior to all other manual procedures. Higher accuracy can only be obtained with mechanical dividers such as the rotary tube divider Type PD. The sample material cascades into the two collecting receptacles through a number of slots, which are arranged opposite to each other. With each dividing process, the feed quantity is halved until the required sample quantity has been reached. Riffle dividers are particularly suitable for field use since they can be operated independent of electrical or mechanical energy sources. The appropriate type of Riffle Dividers is selected according to existing standards and regulations, if available, and the maximum particle size which determines the required width of the slots in the dividing head. Depending on material, maximum particle size and mass percentage thereof, the slot opening shall be 1.5 to 3.5 times the diameter of the largest particle. Features and advantages: • Quick, simple dividing even with difficult bulk materials • Each dividing process will halve the feed sample quantity • Almost any sample quantity can be obtained with repeated dividing • Wide application range in the field or in laboratory • Operates independently of mechanical or electrical supply sources • Easy cleaning and no maintenance required (no moving parts) • Most accurate method of manual dividing M&W JAWO HANDLING Riffle Divider Type RF 12/10 RF 15/12 RF 20/16 RF 30/16 Number of cells 10 12 16 16 Particle size In mm <4 <5 <7 <10 Slot width (A) in mm 12 15 20 30 Container volume in dm3 2 4 8 15 Weight in kgs 5 7.5 27 34 Member of the Mark & Wedell Group - Oldenvej 5, DK-3490 Kvistgaard, Denmark Tel.: +45 49 13 98 22 Fax:+45 49 13 91 62 - Internet: www.m-w.dk E-mail: [email protected] ROTARY TUBE DIVIDING PLANT The Rotary Tube Dividing Plant is used for representative subdivision of material. The dividing plant can be provided with one or more sample outlets. The plant can be installed in conjunction with a sampling plant or placed completely independent of the sampling operation. General Description: The material is extracted from the feed hopper by a stepless adjustable vibration feeder and dosed into the rotary tube divider. The material is led by gravity through the dividing tube, which passes respectively extractor and discharge cone. The division ratio is stepless adjustable. Division ratio = slot opening: (Division circumference – slot opening) The sub-divided material is collected in a dust-proof sample bottle, and the rejects are collected in a plastic container. The components are installed in a lightweight corrotion protected steel structure. The rotary tube dividing plant is available for bulk materials up to 65 mm dia lumps. The Rotary Tube Divider consists essentially of following units: • • • • • • • Feed hopper Vibration feeder Rotary Tube Divider, Type PD Supporting steel structure Electrical control box with feeder – and vibration control, 230/400 V, 50 Hz Sample bottle Reject container M&W JAWO HANDLING B C Drive: Helical geared motor V-belt drive Voltage: 3 x 400 V, 50 Hz Plant Type PD8P PD12P PD17P PD27P Feed hopper Ltr 15 25 50 75 Vibration Feeder Tube Divider A mm B mm C mm Weight kg 50 w 200 w 200 w 500 w PD8 PD12 PD17 PD27 1500 1800 2200 2600 730 960 1060 1430 980 1200 1600 2200 125 167 245 330 Member of the Mark & Wedell Group - Oldenvej 5, DK-3490 Kvistgaard, Denmark Tel.: +45 49 13 98 22 Fax:+45 49 13 91 62 - Internet: www.m-w.dk E-mail: [email protected] MOBILE DIVIDING PLANT The Dividing Plant is used for representative division of material. The Divider can be provided with up to 20 sample outlets. The Dividing Plant can be installed in conjunction with a sampling plant or placed completely independent of the sampling operation. General Description: The material is extracted from the feed-hopper by a step-less adjustable vibration feeder and dosed into the Rotary Tube divider. The material is led by gravity through the dividing tube, which passes the respectively sample outlets in the under cone. The divided samples are collected in dust-proof sample containers. The Dividing plant is available for dry powder and bulk materials with corn size up to 15 mm. The Dividing Plant consists essentially of following units: * Feed hopper * Vibration feeder * Rotary Tube Divider, type PD (with special under cone). * Supporting steel structure (on wheels) and stair. * Electrical control box with feeder- and vibration control, 230/400 V, 50 Hz. * Sample containers. The Dividing Plant is manufactured from glass blasted stainless steel (EN .1.4401 / EN 1.4301).The AS sampler can be installed in any existing air slide within a couple of hours. M&W JAWO HANDLING Principle Sketch: Plant type: PD08 MP PD12 MP Drive: Feed Hopper Ltr. 40 (net) 80 (net) Rotary Tube Divider PD08 PD12 Sample Container Ltr. Max 2 (net) Max 4 (net) Sample Container Pc. Max 20 Max 20 A mm B mm C mm 1900 2050 1200 1500 800 800 Vibration Feeder: 0.2 kW magnet Rotary Tube Divider: 0.25 kW helical geared motor / V-belt drive Voltage: 230 / 400 V, 50 Hz Member of the Mark & Wedell Group - Oldenvej 5, DK-3490 Kvistgaard, Denmark Tel.: +45 49 13 98 22 Fax:+45 49 13 91 62 - Internet: www.m-w.dk E-mail: [email protected] Spinning Riffle Divider Plant Type SRD The Spinning Riffle Dividing Plant is used for representative division of material. The Divider can be provided with up to 16 sample pans. The Dividing Plant can be installed in conjunction with a sampling plant or placed completely independent of the sampling operation. General Description: The material is extracted from the feed-hopper by a step-less adjustable vibration feeder and dosed into the Sample containers, placed on the spinning table. The material is led by gravity into the sample containers. The spinning table with the sample containers rotates constantly, with 12 rpm. The feed rate is adjustable by variable amplitude 200 watt vibration feeder and by the positioning of the exit gate in the hopper. The gate is adjustable from 0 – 150 mm. The divided samples are collected in sample containers. Each container has an overlapping deflector lip on one side to form cutting edges and prevent loss of fines. The Dividing plant is available for powder and bulk materials with up to 50 mm corn size. The Dividing Plant consists essentially of following units: • • • • • • • Feed hopper ~50 litre. Vibration feeder. Spinning table for sample containers. Supporting steel structure. Safety guard around the spinning table. With doors for emptying the sample containers. Electrical control box with feeder- and vibration control, 230/400 V, 50 Hz. 8 Sample containers ~7 litre each (standard). All parts of the Dividing Plant are manufactured from stainless steel (en 1.4301 / EN 1.4401), except the steel structure, which is painted mild steel. Options: - The divider can be provided with a knocker on the feed hopper, used e.g. by moist material. - Sets of 4, 6, 12 and 16 sample containers according to customer requirements. M&W JAWO HANDLING Principle Sketch: Drive: Vibration Feeder: Divider: Voltage: 230 / 400 V, 50 Hz 0.2 kW electro magnet 0.25 kW helical geared motor / V-belt drive Member of the Mark & Wedell Group - Oldenvej 5, DK-3490 Kvistgaard, Denmark Tel.: +45 49 13 98 22 Fax:+45 49 13 91 62 - Internet: www.m-w.dk E-mail: [email protected] !"#$" ! " "" # $ %& $$ $ $ & & $ & && $ ' # & $ & & & %&"''& %()*+),-+./0#.1 % => (=> => 73 7< 4 4 98 <8 % %"()1 ,&/!234!&/" 5633424788'563342498#5$$$$":5$;$" CONTAINERS (CONTAINERS, BUCKETS, BARRELS ETC.) M&W Jawo Handling AS offers a wide range of highquality process containers for the pharmaceutical, food and chemical industries. Containers and accessories will be customised for specific use. Barrels: Standard barrels with open top from 25 to 500 litres, complete with cover and clips in all sizes in EN 1.4301 or EN 1.4401 stainless/acid-proof steel or other qualities when required. Surface finish as required. Cone Outlets and Funnels: Symmetrical and asymmetrical cones customised for any use. Standard slip angle of 60 degrees, other angles as required. Internal Transport containers: M&W Jawo Handling offers transportation for dry product processes for volumes ranging from 1 to 2,500 litres. Material and surface finish as required. For instance in pallet size for transportation by means of pallet lifts or fork trucks. Accessories: M&W Jawo Handling offers a wide range of accessories, including: - Valves - Outlet Vibrators - Flow Regulators - Wheels mounted directly on containers or as container trolleys - Dust-proof Couplings to/from container. Technical Data: Stainless/acid-proof steel: EN 1.4301, EN1.4401 Welding: TIG Crack and crevice free Finish: 2B cold-rolled Sanded according to required grit size Electro polished Glass-bead blasted Member of the Mark & Wedell Group - Oldenvej 5, DK-3490 Kvistgaard, Denmark Tel.: +45 49 13 98 22 Fax:+45 49 13 91 62 - Internet: www.m-w.dk E-mail: [email protected] SAMPLE COLLECTOR TYPE PK / PKT Sample Collector, type PK-10/8 Sample Collector, type PKT-1/17 The Sample Collector is designed for automatic loading of powder and fine granulates into sample bottles in numbers from 6 to 26 and in sizes from 250 ml to 20 l. General Description The Sample Collector consists of the following parts: • • • • • • A turn table with positioning disc for 26 to 6 sample bottles in size from 250 ml to 20 l. The turn table shaft is provided with an index disc with 6 to 26 pitches. The turn table is driven via a secondary disc with a ratchet tooth which engage with the index disc during rotation. The secondary disc is directly connected to a geared motor in such a way that one rotation of the secondary disc corresponds to one step on the turn table bringing the next sample bottle in position for filling. For exact positioning of the turn table a pneumatic operated locking ratchet will engage with the index disc and secure the position. Before filling takes place a pneumatic operated telescopic filling tube will be extended to engage with the sample bottle in a dust tight connection. Removal of filled sample bottles takes place manually through an access door in the upper part of the cabinet. The access door is provided with a safety switch which allows rotating the turn table by hand for accessing all sample bottles on the turn table. M&W JAWO HANDLING As an option the Sample Collector can be provided with spring loaded tightening devices on all sample bottles (type PKT) ensuring constantly sealed sample bottles. Sample Collector Type Bottle Volume Bottle Quantity Cabinet Width [mm] Cabinet Depth [mm] Cabinet Height [mm] Opened Height [mm] PK-0,25/26 250 ml 26 904 904 667 1006 PK-0,5/22 500 ml 22 904 904 701 1040 PK-0,75/19 750 ml 19 904 904 720 1059 1l 17 904 904 752 1091 1,5 l 15 904 904 773 1112 PK-2/13 2l 13 904 904 794 1133 PK-5/9 5l 9 904 904 882 1221 PK-10/6 10 l 6 904 904 962 1301 PK-10/8 10 l 8 1166 1166 650 1000 PK-20/6 20 l 6 1166 1166 950 1300 PK-1/17 PK-1,5/15 The Company and its product line M&W is an internationally working engineering company specialized in the design, manufacturing and supply of sampling systems for all type of bulk materials for quality control, optimising processes and controlling by-products in installations world-wide. M&W ’s product line • • • • • • Sampling Systems Modular Sampling Systems Samplers Dividers Crushers Accessories Member of the Mark & Wedell Group - Oldenvej 5, DK-3490 Kvistgaard, Denmark Tel.: +45 49 13 98 22 Fax:+45 49 13 91 62 - Internet: www.m-w.dk E-mail: [email protected] Dosing Unit Type DU Automatizing Cement Plant Sample Logistics The Dosing Unit Type DU is designed to provide the link between the sampler and an automatized system for sample transport. The Dosing Unit collects a sample from the mixer outlet of a SMX-A sampler into a cartridge in a pneumatic tube system forwarding the sample to the laboratory. The Dosing Unit sits in a vertical or suitably inclined duct under the mixer outlet. While the mixer outlet is opened, a sample drawer is inserted into the stream of material to be filled. When the drawer is retracted from the stream, the powder is released to the sending station. The Dosing Unit Type DU is compatible with a wide range of samplers and homogenizers and mixers and has been used with: • • • • • SMX type Screw Sampler SMX-A type Automatic Screw Sampler AS type Air Slide Sampler M-R type Radial mixer M-K type Cone mixer M&W JAWO HANDLING Dimensions: Nom. volume D d A L DU200 200ccm ø131mm ø55mm ø80mm 550mm DU500 500ccm ø180mm ø76.1mm ø110mm 650mm The Dosing Unit is actuated by a pneumatic cylinder and magnetic valve. Position switches provides feed back of the position of the sample drawer. Material: Supply pressure: Quality: Consumption: Painted steel, optionally Stainless Steel Min. 5 bar, max. 10 bar Dry and oil free Minimal Member of the Mark & Wedell Group - Oldenvej 5, DK-3490 Kvistgaard, Denmark Tel.: +45 49 13 98 22 Fax:+45 49 13 91 62 - Internet: www.m-w.dk E-mail: [email protected] SAMPLER SYSTEMS for BIOMASS on conveyor belts By use of Cross Belt Bucket Sampler By use of Cross Belt Hammer Sampler Sample divider Sample Canisters M&W JAWO HANDLING PFS-A BIO PULVERIZED FUEL SAMPLER for BIOMASS in transport pipes Member of the Mark & Wedell Group - Oldenvej 5, DK-3490 Kvistgaard, Denmark Tel.: +45 49 13 98 22 Fax:+45 49 13 91 62 - Internet: www.m-w.dk E-mail: [email protected] CONVEYORS FOR CONTROLLED RATE FEEDING AND MATERIAL TRANSPORT TYPE D/R The M&W JAWO Handling troughed belt conveyors are specially designed for: • • • Transport of sample material from primary cutter to sample preparation Controlled rate feed of material to crushers and dividers Transport of reject from sample preparation back to main stream The conveyor belt is a rugged multiply design with excellent abrasion resistance giving a very long service life. Mechanical parts and structure of the conveyer is compact and requires minimal maintenance. The feeding conveyors can be forseen with a material buffer with a variable height outlet gate for adjusting the material crossection on the conveyor and the belt speed is normally adjustable so feedrate is fully controlable. The M&W JAWO Handling belt conveyors are covered to preserve sample humidity and integrity of sample and are ATEX ready. The M&W JAWO Handling belt conveyors are available in length over 20m and can be designed and configured to meet specific project requirements. M&W JAWO HANDLING Manufacturing of a conveyor belt We deliver many different versions of conveyor belts. Flat belts, U-shaped belts, horizontal belts and oblique belts. Member of the Mark & Wedell Group - Oldenvej 5, DK-3490 Kvistgaard, Denmark Tel.: +45 49 13 98 22 Fax:+45 49 13 91 62 - Internet: www.m-w.dk E-mail: [email protected] Sampling and Sample Preparation - Questionnaire Material Density t/m³ Max. corn size mm Content of moisture / grease % Temperature ºC Location sample extraction If belt conveyor: Belt width Belt speed mm m/s If chute: Length x width mm Capacity of sampling media t/h Reference standard Consignment t Sampling frequency per hour Weight per sample kg Final corn size Final sample mm kg Accommodation - mounting If possible, enclose drawing Available height m Available width m Measures for connection m Power supply voltage Current V AC / DC Frequency Hz Control voltage V Conditions for the sample location, dust, dry, moisture Standard for customer electrical equipment Additional information M&W JAWO HANDLING SAMPLING INTRODUCTION The basic purpose of sampling is to collect a manageable mass of material which is representative of the total mass of material from which it was collected. This manageable mass of material, called a “sample”, is subject to certain preparation procedures, which render it suitable for either physical testing, or laboratory analysis. The types of tests or analyses, which are performed, are dependent on what characteristics are required to be measured to categorise the material. The method by which samples are collected, the frequency of collecting samples and the accuracy of the samples collected, that is, how closely they represent the true characteristics of the total mass, all depend on the nature of the material being sampled. A totally homogeneous material will require the collection of only a single sample in order to determine its characteristics accurately, whereas a lumpy heterogeneous material will require the collection of many small samples, or increments, which, when combined, will represent the total mass, or lot, with an acceptable degree of accuracy. These increments should be collected from all parts of the lot, with the number required to be collected being dependent on the variability of the material constituting the lot. Since it is required to collect increments from all parts of the lot, it is necessary that the total lot is accessible. In other words, it is of fundamental importance that all particles in the lot have the same probability of being included in the final sample. This is one of the “golden rules” of sampling. To achieve this requirement, it is desirable to sample the lot whilst it is in a dynamic state. In the following it is assumed, that the quality of the material varies in a random manner throughout the mass being sampled and that the observations will follow a normal distribution. Establishing a Sampling Scheme. The following shall be the general procedure for sampling: A: B: C: D: E: F: G: Define the quality parameters to be determined and the type of sample required. Define the lot. Define the precision required. Determine the variability of the quality parameters and establish the number of sampling unit’s (m) required attaining the desired precision and the minimum number of increments (n). Decide whether to use time basis or mass basis sampling and define the sampling intervals in minutes for time basis sampling or in tonnes for mass basis sampling. Ascertain the nominal top size of the material for the purpose of determining the minimum average increment masses. Determine the method of combining the increments into gross samples or partial samples and the method of sample preparation. Precision of Sampling Precision and total Variance The following equation is an estimate of the precision of the experimental results, i.e. the closeness with which the results of a series of experiments made on the same material agree among themselves. VI + V PT n = 2 ± PL m Where PL VI VPT n m is precision of sampling, sample preparation and testing for the lot at 95% confidence level expressed as % absolute. is the primary increment variance is the preparation and testing variance. is the number of increments to be taken from a sampling unit. is the number of sampling units in the lot. Primary Increment Variance The primary increment variance, VI, depends upon the type and nominal top size of the material, the degree of pre-treatment and mixing and the absolute value of the parameter to be determined. The mass of increment taken may also affect the primary increment variance. Preparation and testing variance. The preparation and testing variance is related to VI and to the method of preparation but should be taken as independent of the number of increments. In practice VPT should be less than 0,02*VI subject to a minimum value of 0,05. Number of Sampling Units. The number of increments taken from a lot in order to attain a certain precision is a function of the variability of the quality of the material in the lot irrespective of the mass of the lot. When designing sampling schemes the measure of variability of the lot, i.e. the primary increment variance often has to be determined from the results of sampling relatively small sampling units. This may be a serious underestimation of the variability of the whole lot; for example, when segregation occurs during transport of very large masses of material, during stockpiling or when material is despatched or received over extended periods during which long term changes in quality may occur. Therefore lots should be divided into a convenient number of sampling units. The minimum number of sampling units (m) in a lot shall not be less than the number given in table 1: Table 1: Minimum number of sampling units in a lot Mass of Lot 1000 tonne Minimum number of sampling units 1 2 3 4 5 <5 5 - 20 20 - 45 45 - 80 > 80 This number may be increased so that the sampling unit coincide with a convenient mass or time. Number of Increments per Sampling Unit. As stated in 1.1 the precision is determined by the variability of the material, the number of increments and sampling units and the preparation and testing variance. By transposing equation (1) it can be shown that the number of increments for a desired precision in a single lot can be estimated from the following equation (2): n= 4V I m P 2L - 4 V PT If n is impracticably large then the number of sampling units can be increased either by: 1) 2) increasing m to a number corresponding to a convenient mass or time, recalculate n and continue this until n is a practicable number, or, deciding on the maximum practicable number of increments per sampling unit (n1) and calculate m from equation (3) 4 + 4 n1V PT m= VI 2 n1 P L Mass of Primary Increment. Table 2 gives values for the Reference Increment Mass for a series of nominal top sizes. Values in between these sizes may be estimated by interpolation. Table 2: Reference increment mass Nominal top size in mm Reference increment mass in kg 300 200 150 125 90 63 45 31.5 22.4 16 11.2 8.0 5.6 4.0 2.8 100 25 15 10 5 3 2 1 0.75 0.50 0.25 0.15 0.10 0.10 0.10 Minimum Mass of Gross Sample. There is a minimum mass of gross sample, dependent on the particle size distribution of the material, the precision required for the parameter concerned and the relationship of that parameter to particle size. Some such relationship applies at all stages of preparation. The attainment of this mass will not, of itself, guarantee the required precision. This is also dependent on the number of increments taken to compound the sample and their variability. Table 3: Mass of gross sample/mass of sample after division Nominal top size in mm Minimum mass in kg 300 200 150 125 90 63 45 31.5 22.4 16.0 11.2 8.0 5.6 4.0 2.8 2.0 1.0 15,000 5,400 2,600 1,700 750 300 125 55 32 20 13 6 3 1.5 0.65 0.25 0.10 Member of the Mark & Wedell Group - Oldenvej 5, DK-3490 Kvistgaard, Denmark Tel.: +45 49 13 98 22 Fax:+45 49 13 91 62 - Internet: www.m-w.dk E-mail: [email protected]
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