discharge systems for difficult to handle bulk...

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 deca-

des, have changed decisively the way that

difficult to handle bulk materials are stored

and distributed. Numerous patents and sys-

tems 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 offe-

ring 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 perfor-

mance.

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

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.

Design characteristics

• robust construction

• circular construction form

• flexible or fixed drag arms

Applications

• bulk material reception

• bulk material intermediate storage

• bulk material division within the process

• in combination with SHW-relief systems to prevent stable bridge building

Customer advantages

• easy to maintain

• continuous discharge

• simultaneous feeding of up to six discharge screws

• discharge capacity 5 - 300 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 7.000 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)

• execution CE declaration of conformity

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

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

Applications

• bulk material reception off-site

• conveyor

• ship loader, mobile conveyor

• loading & unloading station for truck, wagon, silo, bunker

Customer advantages

• preservation of environment and workers operating

• keeps the product unchanged

• low maintenance cost

• low energy consumption

• tight

• silence capacity

• execution CE declaration of conformity ATEX:

standard no ex-qualification

Alternatives: Ex II 3 DG

pipe material in stainless steel 1.4301

*) 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)

Technical data

• U-TUBE 406 UT 600 508 UT 800 630 UT 1000 813 UT 1200 tube diameter [mm] 406 508 630 813

tube diameter [ft] 1.33 1.67 2.07 2.67

belt width [mm] 600 800 1000 1200

belt width [ft] 1.97 2.62 3.28 3.94

capacity *) [m³/h] 100 200 300 500

capacity *) [t/h] 100 200 300 500

capacity *) [ft³] 3,531 7,063 10,594 17,657

motor [kW] 7,5-22 9-55 15-75 22-90

motor [HP] 10-30 13-75 20-100 30-125

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


• conical screw axis

• screw bearing independent of rotating tower bearing

• wings with scarifiers

Customer advantages

• high availability with very robust construction

• continuous bulk material feeding over the whole silo cross section

• easy assembly and maintenance

• discharge capacity 0 - 600 m³/h (0 – 21,190 ft³/h) • discharge unit screw adjusted to the bulk material • driving power 3 - 200 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)



Alternatives: Inside: zone 22 and outside: no zone (Ex II 3/- D)

Inside and outside: zone 22 (Ex II 3/3 D)

Technical data

The manufacture of the screw wings

depends on the bulk material.

7

Oscillating Frame With both rotating and oscillating movement,

dry, difficult to handle bulk materials can be

discharged very well.


• low space requirement, in-

stallation height 1,100 mm

(4 ft)


• simple drive mechanism

Applications

• storage silo

• dosage silo

• weighing silo

• loading silo

Customer advantages

• low life-cycle-costs


• 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.

according to choice

• discharge capacity 25-300 m³/h per discharge screw 883-10,594 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








Alternatives:

Inside: zone 22 and

outside: no zone (Ex II 3/- D)


(Ex II 3/3 D)

Inside: zone 21 / outside: zone 22

(Ex II 2/3 D)

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

Applications

• reception silo

• storage silo

• loading silo

Customer advantages


• 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 10 - 250 m³/h per discharge screw 353 - 8,829 ft³/h per discharge screw

• driving power approx. 3.0 - 45 kW (4 – 60 HP) • dimensions Ø 2,500 – 8,000 mm (8 – 26 ft) • weight approx. 800-3,000 kg (1,764-6,614 lbs) • controls function • wear protection as an option, specially tailored to the







Alternatives:

Inside: zone 22 and outside:

no zone (Ex II 3/- D)


(Ex II 3/3 D)

Inside: zone 21 / outside: zone 22

(Ex II 2/3 D)

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


• circular or rectangular design

Applications


• bulk material intermediate storage

• bulk material repartition along the process chain

• in combination with SHW-

relief systems prevention of

stable bridge building

Customer advantages

• low building costs

(installation height)


• mechanical design easy

to maintain

• up to four discharge screws

combined in one silo

• discharge capacity 10 - 100 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


example different stainless steels, Har-

dox, wear protection welding, Infinite

Shield (ceramic)



Alternatives:

Inside: zone 22 and outside: no

zone (Ex II 3/- D)

Technical data

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.



• ladder type frame construction

• rectangular design

Applications


• bulk material transfer

• for underground silos

and tower silos

Customer advantages


• optimum bulk material discharge


• first in first out

• discharge capacity 50 - 600 m³/h per discharge screw

66 - 21,189 ft³/h per discharge screw • driving power 3 - 180 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



example different stainless steels, Har-

dox, wear protection welding, Infinite

Shield (ceramic)


ATEX: standard no ex-

qualification Alternatives:

Inside: zone 22 and outside:

no zone (Ex II 3/- D)

Technical data

11

• discharge capacity

single 1 - 500 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)



Alternatives:

Inside: zone 22 and

outside: no zone (Ex II 3/- D)


(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 configu-

ration of the SHW-SHS relief

systems will be adjusted to

the properties of the bulk ma-

terial 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

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

Applications

• dosing / transport / discharge / blending

Customer advantages

• trough construction allows for good accessibility

• closed transport unit

• bulk material will be discharged over the whole length


• precise dosage control

Worldwide

SHW

Storage & Handling Solutions GmbH

Wasseralfinger Str. 60 - 66

73460 Huettlingen, Germany

Phone: +49 (0) 7361/5280-0

Fax: +49 (0) 7361/5280-199

www.shw-shs.de

[email protected]

www.shw-shs.de

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