Discharge systems for difficult to handle bulk materials

Transcription

1 Discharge systems for difficult to handle bulk materials

2 Difficult to handle bulk materials SHW Schwäbische Hüttenwerke is a traditional company that has been trading for 640 years and since the 1960s has been constantly developing and manufacturing components and installations for the storage and transport of difficult to handle bulk materials. Technical innovations from our company SHW Storage & Handling Solutions, over the past few decades, have changed decisively the way that difficult to handle bulk materials are stored and distributed. Numerous patents and systems testify to this which is now used as the standard or benchmark to the industry. Our varied business activities range from the supply of single standard components to tailor made solutions to suit a customer's individual requirements. We can design and project manage complete systems, providing the customer with the optimum solutions. Naturally we can also help our customer to maintain and service his equipment by offering planned maintenance and spare parts stocking advice as well as advising them about up to date retro fits to their existing machines that can help to improve performance. 2

3 Examples of applications of our discharge systems Rotor 4 U-Tube 5 * Rotating Screw 6 Oscillating Frame 7 Sliding Frame 8 Eccentric Frame 9 Live Bottom 10 Screw Conveyor 11 *except > 35% ds 3

4 Rotor An optimum discharge unit for difficult to handle bulk materials stored in circular silos. Self-adjustment of the drag arm position and the driving torque control to the moving behaviour of the bulk material. robust construction circular construction form flexible or fixed drag arms bulk material reception bulk material intermediate storage bulk material division within the process in combination with SHW-relief systems to prevent stable bridge building easy to maintain continuous discharge simultaneous feeding of up to six discharge screws discharge capacity m³/h (177-10,594 ft³/h) per discharge screw driving power 5.5 up to 37 kw (7.5 up to 50 HP) dimensions Ø 2,500 7,000 mm (8 23 ft) weight up to kg (15,432 lbs) controls function, optionally storage control wear protection as an option, specially tailored to the application and the bulk material, for example different stainless steels, Hardox, wear protection welding, Infinite Shield (ceramic) ATEX: standard no ex-qualification Alternatives: Inside: zone 22 and outside: no zone (Ex II 3/- D) Inside and outside: zone 22 (Ex II 3/3 D) Various possibilities for discharge screw positioning Alternative digging tools The manufacture of the drag arms depends on the bulk material. according to choice 4

5 Bulk material transport in a tube guided belt with different inclinations. Auto-centred deep trough belt in the tube authorizing a higher capacity. solid and robust structure design belt centring in tube front drum intermediate sections easily adaptable in length front scraper speed switch belt alignment switch infeed chute outlet chute, eventually dust filter, weighing dynamic section or metal separator included design standard and tight return casing with dust reclaiming separate electric control may be included sectional structure, module length of 6 m (20 ft) self-supporting steel structure with clear span of 12 m or 24 m (39 ft or 79 ft) reversible transport direction modular design for easy assembly inclination up to 30 degree bulk material reception off-site conveyor ship loader, mobile conveyor loading & unloading station for truck, wagon, silo, bunker preservation of environment and workers operating keeps the product unchanged low maintenance cost low energy consumption tight silence capacity Technical data U-TUBE 406 UT UT UT UT 1200 tube diameter [mm] tube diameter [ft] belt width [mm] belt width [ft] capacity *) [m³/h] capacity *) [t/h] capacity *) [ft³] 3,531 7,063 10,594 17,657 motor [kw] 7, motor [HP] execution CE declaration of conformity ATEX: standard no ex-qualification Alternatives: Ex II 3 DG pipe material in stainless steel *) capacities (m³/h and ft³/h) at a belt speed of v = 1 m/s (3 ft/s) for a φ = 30 angle of repose and bulk densities of ρ = 1,000 kg/m³ (62 lb/ft³) 5

6 Rotating Screw The discharge unit for dry / semi-dry difficult to handle bulk materials. The manufacture of the screw is dependent on the bulk material - scarifiers, screw pitch, construction size 1,450 mm (5 ft) diameter with two screws possible. cantilever design robust construction conical screw axis screw bearing independent of rotating tower bearing wings with scarifiers high availability with very robust construction continuous bulk material feeding over the whole silo cross section easy assembly and maintenance The manufacture of the screw wings depends on the bulk material. Technical data discharge capacity m³/h (0 21,190 ft³/h) discharge unit screw adjusted to the bulk material driving power kw (4 250 HP) dimensions Silo Ø up to 8,000 mm Ø up to 12,000 mm Ø up to 15,000 mm Ø up to 25,000 mm Ø up to 26ft Ø up to 39 ft Ø up to 49 ft Ø up to 82 ft tower Ø 900 mm Ø 1,450 mm Ø 2,100 mm Ø 3,100 mm Ø 3 ft Ø 5 ft Ø 7 ft Ø 10 ft number of arms 1 1/2 1 1 weight approx. 4,000 24,600 kg (8,818 54,233 lbs) controls motor temperature/overfilling sensor/central lubrication wear protection as an option, specially tailored to the application and the bulk material, for example different stainless steels, Hardox, wear protection welding, Infinite Shield (ceramic) ATEX: standard no ex-qualification Alternatives: Inside: zone 22 and outside: no zone (Ex II 3/- D) Inside and outside: zone 22 (Ex II 3/3 D) 6

7 Oscillating Frame With both rotating and oscillating movement, dry, difficult to handle bulk materials can be discharged very well. low space requirement, installation height 1,100 mm (4 ft) robust construction simple drive mechanism storage silo dosage silo weighing silo loading silo low life-cycle-costs easy to maintain low wear simultaneous feeding of up to four discharge screws oscillating or rotating movement very good emptying Maximum mobility for optimum bulk material discharge Beside the oscillating movements necessary for a continuous discharge, complete rotations (for example emptying) are possible. Due to the position of electric drive in the centre of the oscillating frame there can be many options available for the positioning of the discharge screws. discharge capacity m³/h per discharge screw ,594 ft³/h per discharge screw driving power up to 6 driving units with each 2.2 kw (3 HP) dimensions Ø up to 6,000 mm (20 ft) weight up to approx. 7,000 kg (15,432 lbs) controls storage temperature, function wear protection as an option, specially tailored to the application and the bulk material, for example different stainless steels, Hardox, wear protection welding, Infinite Shield (ceramic) ATEX: standard no ex-qualification Alternatives: Inside: zone 22 and outside: no zone (Ex II 3/- D) Inside and outside: zone 22 (Ex II 3/3 D) Inside: zone 21 / outside: zone 22 (Ex II 2/3 D) according to choice 7

8 Sliding Frame Ideal discharge unit for dry to wet difficult to handle bulk materials. The sliding frame can also be split into two frames, operated shifted. Both designs are hydraulically driven. solid and robust frame design for large diameter silos use the split frame reception silo storage silo loading silo easy to maintain up to four different discharge screws combined in one silo high operational safety good emptying characteristics sliding frame moves over the whole silo base discharge capacity m³/h per discharge screw 353-8,829 ft³/h per discharge screw driving power approx kw (4 60 HP) dimensions Ø 2,500 8,000 mm (8 26 ft) weight approx ,000 kg (1,764-6,614 lbs) controls function wear protection as an option, specially tailored to the application and the bulk material, for example different stainless steels, Hardox, wear protection welding, Infinite Shield (ceramic) ATEX: standard no ex-qualification Alternatives: Inside: zone 22 and outside: no zone (Ex II 3/- D) Inside and outside: zone 22 (Ex II 3/3 D) Inside: zone 21 / outside: zone 22 (Ex II 2/3 D) 8

9 Eccentric Frame The ideal discharge unit for both wet and dry bulk materials. For circular silos there is a rotating and eccentric movement of the rotary wheel. For rectangular silos, the frame moves eccentrically. space-saving construction robust construction circular or rectangular design bulk material reception bulk material intermediate storage bulk material repartition along the process chain in combination with SHWrelief systems prevention of stable bridge building low building costs (installation height) low life-cycle-costs mechanical design easy to maintain up to four discharge screws combined in one silo Technical data discharge capacity m³/h per discharge screw 353-3,531 ft³/h per discharge screw driving power 2.2 up to 7.5 kw (3 up to 10 HP) dimensions circular 3,000, 4,000 and 5,000 mm diameter 10, 13 and 16 ft diameter rectangular 2,000 x 3,000 and 3,000 x 4,000 mm 7 x 10 and 10 x 13 ft intermediate size optionally weight approx. 2,500 kg (5,511 lbs) controls function, optional storage temperature wear protection as an option, specially tailored to the application and the bulk material, for example different stainless steels, Hardox, wear protection welding, Infinite Shield (ceramic) ATEX: standard no ex-qualification Alternatives: Inside: zone 22 and outside: no zone (Ex II 3/- D) 9

10 Live Bottom Ideal discharge unit for difficult to handle bulk materials which are stored in rectangular silos. The material discharge frames are operated shifted and hydraulically driven. robust construction ladder type frame construction rectangular design bulk material reception bulk material transfer for underground silos and tower silos low life-cycle-costs optimum bulk material discharge easy to maintain first in first out Technical data discharge capacity m³/h per discharge screw 66-21,189 ft³/h per discharge screw driving power kw (4 250 HP) dimensions 20,000 x 20,000 x 2,500 15,000 mm 66 x 66 x 8 49 ft controls specially optimized control and sensor concepts wear protection as an option, specially tailored to the application and the bulk material, for example different stainless steels, Hardox, wear protection welding, Infinite Shield (ceramic) ATEX: standard no exqualification Alternatives: Inside: zone 22 and outside: no zone (Ex II 3/- D) 10

11 Screw Conveyor An independent component used by all the discharge units with flexible controls to suit each individual application. conical and progressive pitch flanged bearings or pedestal bearings with stuffing box dosing / transport / discharge / blending trough construction allows for good accessibility closed transport unit bulk material will be discharged over the whole length easy to maintain precise dosage control discharge capacity single m³/h (35-17,657 ft³/h) tandem 2-1,000 m³/h (71-35,315 ft³/h) dosage precision up to ± 3 % driving power 0.55 up to 55 kw (0.75 up to 75 HP) dimensions trough length 1,000 up to 12,000 mm 3 up to 39 ft trough width 230 up to 1,100 mm 1 up to 4 ft (tandem 2,000 mm / 7 ft) diameter: 300 up to 925 mm 1 up to 3 ft weight 500-5,000 kg 1-11 kg (1,100-11,023 lbs) controls thermal sensor / function wear protection as an option, specially tailored to the application and the bulk material, for example different stainless steels, Hardox, wear protection welding, Infinite Shield (ceramic) ATEX: standard no ex-qualification Alternatives: Inside: zone 22 and outside: no zone (Ex II 3/- D) Inside and outside: zone 22 (Ex II 3/3 D) Inside: zone 2l / outside: zone 22 (Ex II 2/3 D) Relief Systems The SHW-SHS relief systems enable the weight of the bulk material to be divided gradually in the silo. By doing this then stable bridge building is prevented. Furthermore the pressure of the bulk material column on the outlet will be reduced. The result is that the bulk material can be discharged better and the discharge components will be protected. As well as a higher degree of operational safety this also has positive effects on the durability of the components. The installation and configuration of the SHW-SHS relief systems will be adjusted to the properties of the bulk material and is available for both steel and concrete silos. Compacted bulk material: bridge building and blocked material flow No stable bridge building by relief systems at the silo 11

12 Worldwide SHW Storage & Handling Solutions GmbH Wasseralfinger Str Huettlingen, Germany Phone: +49 (0) 7361/ Fax: +49 (0) 7361/