DE9104091U1 - Defiller - Google Patents

Description

GbR Weber, Kölsch, Plaumann and Hundhausen April 2, 1991 Heideweg 11 Ne/Bl (1398A)

5200 Siegburg 90.587 DE 0

Defiller

Description

The invention relates to a filler, i.e. a dust removal device for bulk material, in particular gravel, chippings or the like produced in a crusher. Dedusting the aforementioned bulk materials is necessary, in particular for finer grain sizes, in view of the intended use; for example, the fine chippings for asphalt production may only contain a certain proportion of slurryable material - i.e. dust - as otherwise the quality is impaired. In addition to these purely technical aspects, however, for coarser grain sizes, where the filler - i.e. dust - generally does not cause any disadvantages in use, dedusting is an additional requirement in view of the reasonable environmental impact. The same applies to the recycling of construction waste or the processing of milled material; the materials obtained in this way are also used in the production of asphalt, possibly with the addition of concrete rubble.

According to the current state of the art, dust removal is carried out using vibrating screens, which require a considerable amount of floor space. The separation of the bulk material from the filler that occurs in this way may be sufficient from a technical point of view, but considerable dust development cannot be suppressed, so that further improvement is required here.

Based on this, the invention is based on the object of providing a filler which requires little installation space in relation to the throughput capacity and has improved effectiveness with regard to dust development. The solution to this consists in a filler which is characterized by an essentially vertically extending shaft with an upper feed opening for dust-containing bulk material and a lower discharge opening for dedusted bulk material, an arrangement of impact bodies for cascading and fanning out the bulk material, which are arranged distributed over the vertical height of the shaft in several levels, a compressed air supply opening into the shaft below the arrangement of impact bodies and at least one air extraction line leading out of the shaft above the arrangement of impact bodies. Depending on the grain size, such a filler can be used immediately after the crusher in the production process or, in the case of finer grain sizes, where an unacceptable amount of abrasion still occurs on the conveyor belts or in the bunker, immediately before a loading station. The filler according to the invention is loaded with bulk material from above via conventional conveying means such as conveyor belts or the like, which is spread out in the arrangement of impact bodies within the shaft, whereby the dust content is removed by the arrangement of the blower air supply and the air extraction line in countercurrent and fed to conventional separation systems without any significant spread of the dust. Conventional pocket filters are suitable as such separation systems.

For effective spreading of the bulk material, the shaft is preferably designed to be of approximately constant depth and to increase in width towards the bottom, whereby an opening angle of approximately 20° - 30° appears to be suitable. The impact bodies are arranged in several rows at different heights, with a gap between them, so that the aforementioned cascade effect is exerted on the bulk material. To reduce the amount of dust escaping from the unfiller, the discharge opening can be designed as a narrowed gap adapted to the flow of the bulk material.

The blower air supply is via a gap that essentially corresponds to the width of the shaft at the lower end. The air extraction opening at the upper end of the shaft can be designed in a substantially similar way. If this is connected to an extraction pipe or extraction duct running parallel to the width of the shaft, the overflow can preferably be reduced in the direction of the outflow.

Air extraction lines can also be provided on both opposite broad sides of the shaft.

According to a favorable further development, the shaft can have a baffle plate at the top end on one broad side, against which the bulk material fed in via a conveyor belt already hits when it is fed in, in order to achieve an initial scattering effect. In such a design, a discharge opening on the opposite broad side of the shaft can be connected to a discharge channel that leads away diagonally downwards. The air supply and/or the

Air extraction should preferably be equipped with a flow control system, which can be controlled directly via the blower output or indirectly via throttle valves, for example in the air supply. The flow rate should be set so that the dust is essentially kept in suspension or experiences a slight upward movement in the shaft after the bulk material has been sufficiently fanned out. However, the upward movement should not be so strong that significant amounts of dust escape from the feed opening.

The impact bodies, which are subject to wear or damage, are conveniently only suspended on the opposite broad sides of the shaft, so that they can be easily replaced. They can be simple round rods or angle pieces pointing upwards in the shape of a roof. Other designs are possible depending on the grain size of the bulk material to be treated. With a filler according to the invention, whose shaft cross-section is approximately 1,700 x 500 mm at the widest point, i.e. in the area of the blower air supply, a throughput of 70 t per hour is possible when feeding basalt with a grain size of 0-5 mm. The amount of air required for this is 6,000 m per hour. The discharge of dust with a particle size of less than 0.09 mm is 94 - 97%. For the same throughput, 6 vibrating screens of conventional size would be required, without the advantageous effect of almost completely suppressing dust formation being achieved.

An embodiment of the present invention is illustrated in the drawing.

Fig. 1 shows a filler according to the invention

a. in front view

b. in vertical section B-B according to Fig. la

c. in plan view;

Fig. 2 in section A-A according to Fig. Ib.

In Figures 1a to 1c, which are treated uniformly below, the shaft 1 with an upper feed opening 2 and a lower discharge opening 3 can be seen in its basic form. The shaft consists essentially of parallel cover plates 4, 5 and partially slanted side plates 6, 7. In Figure 1b, an inclined impact plate 8 can be seen on the top of the cover plate 5, against which the bulk material is thrown by a conveyor belt approaching from the left. The discharge opening 3 is designed directly on a funnel body 9. The shaft 1 has a supporting frame structure 10, to which hooks 11 are attached in the area of the side plates, into which individual parts of the side plates 6, 7 are removably hooked. This allows access to the arrangement of the impact bodies, which will be explained later.

At the lower end of the cover plate 5 there is an inlet opening 12, to which a fan air supply shaft 13 is connected. This can be used for further cable routing or

A centrifugal fan (not shown here) can be connected directly. At the upper end of the cover plate there is an exhaust opening 14 that runs across the entire width of the shaft and passes into an exhaust line 15 that runs parallel to the width of the shaft. A connecting shaft 16 is provided between the line 15 and the opening 14.

On the opposite side, an air extraction line 17 is provided, which is parallel to the line 15 and is connected to the inside of the shaft via a connecting shaft 18 and an air extraction opening not shown in detail. One of several impact elements 20 can be seen at three different heights within the shaft.

In Figure 2, the cover plate 5 can be seen from the inside, with the lower fan air inlet opening 12 and the upper air exhaust opening 14 visible, which tapers in the direction of the air exhaust line 15 leading away to the right (not visible here) in order to ensure equal outflow quantities across the width of the shaft. In the area between the two openings, three rows of impact bodies 20 are cut in a roof shape, each of which is spaced apart from one another. The bulk material fed in from above is thus fanned out.

Yes.

GbR Weber, Kölsch, Plaumann and Hundhausen Heideweg 11
5200 Siegburg

02 April 1991

Ne/Bl (1398A)

90.587 EN

Defiller

List of reference symbols

1 shaft

2 Feed opening

3 Drain opening

4 Cover plate

5 Cover plate

6 Side panel

7 Side panel

8 Baffle plate

9 Funnel part

10 frames

11 hooks

12 Blower air opening

13 Blower air supply duct

14 Air vent

15 Air exhaust pipe

16 Air extraction shaft

17 Air exhaust pipe

18 Air extraction shaft 19

20 impact bodies

Claims (7)

GbR Weber, Kölsch, Plaumann and Hundhausen 02 April 1991 Heideweg 11 Ne/Bl (1398A) Siegburg 90.587 DE 0 Entfüller Protection claims 1. De-duster, i.e. de-dusting device, for bulk material, in particular gravel or chippings produced in the crusher, marked by a substantially vertically extending shaft (1) with an upper feed opening (2) for dust-containing bulk material and a lower discharge opening (3) for dedusted bulk material, an arrangement of impact bodies (20) for cascade-like deflection and fanning out of the bulk material, which are arranged distributed over the vertical height of the shaft (1) in several levels, a blower air supply (12, 13) opening into the shaft below the arrangement of impact bodies (20) and at least one air extraction line leading away from the shaft above the arrangement of impact bodies (20) (14, 15, 16; 17, 18). 2. Filler according to claim 1,
characterized, that the shaft (1) has a width that increases downwards while the room depth remains constant, with an opening angle of preferably approx. 20 - 30°. 3. Filler according to claim 1,
characterized, that the impact bodies (20) - in particular in the form of roof-shaped angle pieces or in the form of round bars - extend over the entire depth of the shaft (1) and are arranged in horizontal rows spaced apart from one another. 4. Filler according to claim 1,
characterized, that the blower air supply has a channel (13) that opens essentially horizontally into the shaft (1) and takes up a significant part of the width of the shaft (1). 5. Filler according to claim 1,
characterized, that the at least one air extraction line comprises a pipe (15, 17) running parallel to the shaft cross-section, to which an air transfer shaft (16, 18) with an air extraction opening (14) narrowing in the extraction direction leads. t λ .. , ¹ L: 6. Filler according to claim 1,
characterized, that the inlet opening (2) is provided with a lateral baffle plate (8) and the at least one air extraction line (17) has its air extraction opening in the shaft wall (4) opposite the baffle plate. 7. Filler according to claim 1,
characterized, that the at least one air extraction line (17) leads away from the shaft (1) via an air extraction shaft (18) inclined downwards. K ' ■■■ «J ü &ogr;