EP2339235B1 - Apparatus for the conveyance of solid combustible material - Google Patents

Description

The present invention relates to a device for conveying solid combustible material by means of a conveying means. The invention finds particular application in the promotion of fire and / or explosionsgefäbrlichen solid materials.

In the promotion of solid combustible material, such as coal, but also in materials such as pyrite, which represent a fire and / or explosion hazard at least in dusty form, are regularly subsidies, such as conveyors or drag chain conveyors used. These materials often have a significant dusty content that can accumulate below the conveyor during operation of the conveyor. Because this dusty portion of the solid material has a high flammability and thus represents a high risk of fire and / or explosion, it must be removed regularly.

From the US 4,257,518 A For example, a device for conveying fine-grained material emerges. This device has in a housing on a main conveyor belt, a return conveyor belt and a cleaning conveyor belt. In a transition region between the main conveyor belt and the return conveyor belt plates are arranged, through which the fine-grained material is guided in the transfer from the main conveyor belt to the return conveyor belt. Furthermore, the housing has an oblique section in the region of the cleaning conveyor belt.

In order to convey solid material accumulating below the conveying means back onto a conveying means, scraping elements can be provided, in particular on conveying belts of conveying means, which remove solid material accumulating below the conveying means during the operation of the conveying means. However, it has been found that with these scraping elements not the entire area below the conveyor can be cleaned. A cleaning from the side In addition to the conveyor located areas, especially in areas where the conveyor is stored with bearing means and / or drive means is not possible with the known funding at least without considerable technical effort and / or during operation. However, especially in these areas during operation of the conveyor particularly high temperatures prevail. These result, in particular, from a heating of the drive means and / or from a heating of the bearing means as a result of friction between movable components of the bearing means and between the bearing means and the conveying means. In addition, upon contact of metallic and / or ceramic components and / or impurities of the solid material with movable, in particular rotating, drive and / or bearing means for sparking, so that deposits of particular dusty material in these areas represent a considerable hazard.

The object of the invention is therefore to solve the problems described with reference to the prior art at least partially and in particular to provide a device for conveying solid combustible material, which significantly reduces the risk of fire and / or explosion in the promotion of combustible solid material having. Furthermore, a particularly simple way to clean such devices during operation should be specified.

These objects are achieved with a device according to the features of claim 1. Further advantageous embodiments of the invention are specified in the dependent formulated claims. It should be noted that the features individually imposed in the dependent claims can be combined with one another in any technologically meaningful manner and define further embodiments of the invention. In addition, the features specified in the claims are specified and explained in more detail in the description, wherein further preferred embodiments of the invention are shown.

The inventive device for conveying solid combustible material has at least one conveying means, wherein the conveying means is at least partially supported by bearing means and / or drive means, in particular on a frame. Further, the device has at least one arranged below the conveyor collecting space having a height, below at least one bearing means and / or below at least one drive means at least one deflection means for deflecting solid combustible material towards the collecting space is arranged and wherein the funding mechanical material remover for the removal of Has material from the collection space.

The solid combustible material is, in particular, a material which, at least in a dusty and / or fine-grained state, has a high flammability and / or a high risk of explosion. In particular, this material is coal and / or pyrite. The conveying of the material takes place with the aid of a conveying means, which in particular has an upper strand and a lower strand, wherein this conveying means is in particular a drag chain conveyor or plate conveyor or belt conveyor. These funding regularly have conveyor plates for receiving the material to be conveyed, which are attached to chains and / or a metal net, which transmit the drive energy of a drive on the conveyor plates. The conveyor is, in particular in lateral areas (orthogonal) to the conveying direction, with bearing means and / or drive means, in particular bearing rollers, mounted on a (metal) frame. This frame may in particular be a (closed) housing of the device, wherein the deflection means is integrated in the housing below at least one bearing means and / or below at least one drive means of the conveying means.

For receiving dusty and / or fine-grained material that can accumulate during operation of the conveyor below the conveyor, is located below the conveyor, in particular below the lower run and / or the upper run, a plenum. This collecting space is regularly limited, at least in part, by the conveying means, a floor and lateral deflection means. In addition, this collecting space has a height, which is the distance between the lower strand and the ground, which is perpendicular to the conveying means. The at least one deflection means is arranged below at least one bearing means and / or below a drive means of the conveying means and most preferably extends along the conveying direction over the length of the conveying means. The deflection means is preferably arranged so that it deflects material which falls down from the conveying means into lateral areas of the device, directly to the collecting space. For this purpose, the deflection to central / central areas of the device is usually carried out below the conveying means, where the collecting space is preferably located. Thus, the deposition of such material in the critical areas, which are difficult to clean, is avoided immediately.

On the conveyor mechanical material remover are arranged. These mechanical material remover are usually rigidly connected to the conveyor (eg the conveyor plates), but also a flexible and / or movable storage is possible. By the latter variant it is achieved that the mechanical material remover, in particular in the region of the upper strand due to gravity lie substantially flat on the conveyor, and so not reduce the conveying capacity of the conveyor and in particular only in the region of the lower run of the conveyor into the underlying collecting space of the funding protrude. For this purpose, the mechanical means may be fastened, for example, with hinges to the conveyor.

• wenigstens ein Leitblech,
• wenigstens ein Schaber,
• wenigstens eine Blasvorrichtung,
• wenigstens ein Vibrationsförderer.

It is advantageous if at least one deflection means is arranged below the conveying means, in particular below at least one bearing means and / or below the at least one drive means, from the following group:

• at least one baffle,
• at least one scraper,
• at least one blowing device,
• at least one vibratory conveyor.

In particular, the baffle has a gradient in the direction of the collecting space, so that material collected in the area of the storage means (for example in the manner of a chute) is at least partially directed in the direction of the collecting space. It should be clarified here that the at least one baffle may not necessarily be a sheet but a surface formed of any material with a slope in the direction of the collecting space. The guide plate can be designed as a separate component, but also an integral part of the frame, or of the housing. The baffle may also have scrapers, with the help combing on the at least one baffle accumulating material are removed. However, scrapers can also be arranged independently of baffles below bearing means and / or drive means which promote the material located there in the direction of the collecting space. Furthermore, blowing devices or vibrating conveyors can also be provided, which convey the material continuously or discontinuously in the direction of the collecting space.

It is particularly advantageous if the deflection means comprises a baffle with a gradient of at least 30 °. A gradient of the at least one guide plate of at least 45 °, particularly preferably 60 °, is preferred. This ensures a particularly safe removal of accumulated in the storage medium material.

Preferably, the at least one deflection means comprises a baffle with a reduced friction and / or a sliding coating. This embodiment provides an improved promotion of the material in the direction of the collecting space.

Furthermore, it is advantageous if the height of the collecting space is at least 20 cm. A height of the collecting space of at least 40 cm, particularly preferably at least 60 cm, is preferred. As a result, it is achieved, for example, that the material is collected at a sufficient distance from the bearing means of the lower run of the conveying means in the collecting space. The removal of the material from the collecting space can be done manually as part of the general maintenance intervals of the conveyor or in dependence on a filling height of the collecting space. At the same time a maximum height of the collecting space of 160 cm, preferably 120 cm and particularly preferably 80 cm is proposed.

In a particularly preferred embodiment of the invention, the conveying means comprises mechanical material removers for removing material from the collecting space. For this purpose, the mechanical material removers are preferably arranged on and / or under the conveying means, in particular substantially rigidly projecting and in particular over the entire width (orthogonal to the conveying direction of the conveying means), so that these protrude into the collecting space and accumulate material in the collecting space during the operation of the Remove conveyor. This can be done, in particular, by the fact that the mechanical material removers convey the material from the collecting space into a removal container or back onto the conveying means.

It is particularly advantageous if the conveying means has at least one mechanical material remover from the following group: scratches, brushes, rakes.

Preferably, the device has a feed area and a discharge area. The task area is that area of the device in which the material to be conveyed is applied to the conveyor. Accordingly, it is in the Dispensing area around the area of the device in which the conveyed material is discharged from the conveyor. Accordingly, it is preferable that the collection space extends over a part of the distance from task area to task area (as well as the deflection means in parallel thereto).

It is particularly advantageous if the conveying means or the mechanical material removers are at least partially made of metal. As a result, the conveyor or the mechanical material remover can be performed particularly robust, so that high flow rates can be achieved.

In a further embodiment, it is provided that with the conveying means, the material from a material storage to a combustion chamber of a combustion vessel can be conveyed. Consequently, the device serves, e.g. To transport coal from the material storage to the task area, the conveyor and the discharge area to a combustion boiler.

1. a) den Füllstand des Sammelraums, und/oder
2. b) die Temperatur des Materials, und/oder
3. c) die Gaszusammensetzung im Bereich des Fördermittels auf.

Preferably, the device has at least one detection means for:

1. a) the level of the collecting space, and / or
2. b) the temperature of the material, and / or
3. c) the gas composition in the region of the conveyor.

By means of a detection means for the filling level of the collecting space, it is advantageously possible to detect a required removal of the material from the collecting space, in particular if no continuous cleaning takes place. To make the device particularly safe, it is advantageous if the device has at least one detection means for the temperature of the material and / or the gas composition in the region of the conveying means. As a result, critical temperatures can be detected for an ignition of the material and corresponding Countermeasures, such. As the cooling of the material with cooling air, are initiated. By a detection means for the gas composition, an inflammation of the material can be detected and fire fighting measures are initiated as early as possible.

According to a further expedient embodiment, the device has at least one extinguishing device.

It is also advantageous if the device has at least one extinguishing control, wherein the extinguishing control is set up to activate the at least one extinguishing device. In this case, the extinguishing control can be connected both to the at least one temperature-of-the-material and / or gas-composition detection means and to the at least one extinguishing device in a data-conducting manner. This allows activation of the extinguishing device by the extinguishing control in the event of detection of a fire.

In a further development of the invention it is proposed that the conveying means is at least partially disposed in a housing. As a result, noise emissions and / or dust emissions can be reduced in an advantageous manner.

It is particularly advantageous if a distance between the mechanical material removers and a bottom of the collecting space is 5 mm to 50 mm. The distance between the mechanical material remover and the bottom of the collecting space is preferably 5 mm to 35 mm, particularly preferably 5 mm to 20 mm. In this way, on the one hand, it can be ensured in an advantageous manner that the collecting space is sufficiently cleaned and, on the other hand, spark formation by touching the mechanical material removers with the ground is avoided.

In a further embodiment it is provided that the device has a removal container for receiving material removed from the collection space. In principle, however, it is preferred that the material is conveyed back onto the conveying means.

According to a further aspect of the invention, a use of the device for transporting coal and / or pyrite is proposed. In particular, it is proposed that the device be used to convey material intended for combustion to a combustion chamber.

The invention and the technical environment will be explained in more detail with reference to FIGS. It should be noted that the figures show particularly preferred embodiments of the invention, but this is not limited thereto.

Fig. 1:

einen Querschnitt durch eine erfindungsgemäße Vorrichtung, und

Fig. 2:

einen Längsschnitt durch eine erfindungsgemäße Vorrichtung.

They show schematically:

Fig. 1:

a cross section through a device according to the invention, and

Fig. 2:

a longitudinal section through a device according to the invention.

The Fig. 1 shows a cross section through an inventive device 1, wherein a conveyor 3 (for example, a conveyor belt) with the aid of bearing means 5 (for example, rollers) and drive means 26 (for example Zugketten) is arranged in a here designed as a housing 20 frame 6. The conveyor 3 has an upper run 25 and a lower run 4. At the conveyor 3 mechanical material remover 11 are fixed, which are designed here as a scratch. These mechanical material removers 11 protrude from the lower run 4 into a collecting space 7 arranged below the lower run 4. The collecting space 7 has a height 10 and is from a bottom 21 of the housing 20, the lower strand 4 and lateral deflecting means 8 formed as baffles limited. The baffles have in this case in the area below the bearing means 5 and the drive means 26 of the lower strand 4 of the conveyor 3 a slope 9 in the direction of the collecting space 7. In order to prevent contact of the mechanical material remover 11 with the bottom 21 of the collecting space 7, a distance 24 is formed between the mechanical material remover 11 and the bottom 21.

Furthermore, the device 1 above the lower strand 4 and above the upper run 25 detection means 17 and extinguishing devices 18, which are each data-conducting connected to a clear control 19.

The Fig. 2 shows a device 1 according to the invention, in which a conveying means 3 is arranged in a frame 6 designed as a housing 20. Both the upper run 25 and the lower run 4 of the conveyor 3 are mounted on the housing 20 by means of bearing means 5 and drive means 26. The device 1 has a feed area 15, in which material 2 from a material store 12 is fed onto the conveyor 3. The material 2 is then conveyed through the upper strand 25 of the conveying means 3 to a delivery region 16, via which the material 2 is discharged into a combustion chamber 14 of a combustion vessel 13. Below the lower run 4 a collecting space 7 is provided, in which in particular dust-like and / or fine-grained material 2 is accumulated. This collecting space 7 is at least partially limited by lateral deflection means, not shown here. In order to remove material 2 accumulated in the collecting space 7 from the collecting space 7, the conveying means 3 has mechanical material removers 11 which move the material 2 either through a removal opening 23 into a removal container 22 shown in dashed lines and / or preferably back to the upper run 2 5 promote.

The proposed device for conveying solid combustible material is particularly suitable for the promotion of fire-resistant and / or explosive solid materials.

LIST OF REFERENCE NUMBERS

1

contraption

2

material

3

funding

4

strand

5

Bearing means.

6

frame

7

plenum

8th

deflecting

9

gradient

10

height

11

mechanical material remover

12

material storage

13

burning boiler

14

combustion chamber

15

remit

16

delivery area

17

detection means

18

extinguishing device

19

Delete control

20

casing

21

ground

22

removal container

23

removal opening

24

distance

25

obertrum

26

drive means

Claims (17)

1. Apparatus (1) for the conveyance of solid combustible material (2), having at least one conveying means (3), wherein the conveying means (3) is supported at least partially by bearing means (5) and/or drive means (26), in particular on a stand (6), and the apparatus (1) having at least one collecting space (7) located below the conveying means (3) and having a height (10), at least one deflecting means (8) for the deflection of solid combustible material (2) towards the collecting space (7) being located below at least one bearing means (5) and/or below at least one drive means (26), and wherein the conveying means (3) has mechanical material removers (11) for removal of material (2) from the collecting space (7).
2. Apparatus (1) according to Claim 1, wherein at least one deflecting means (8) from the following group is located below the conveying means, in particular below the at least one bearing means (5) and/or below the at least one drive means (26),

   - at least one baffle plate,

   - at least one scraping tool,

   - at least one blowing device,

   - vibrating conveyer.
3. Apparatus (1) according to one of the preceding claims, wherein the at least one deflecting means (8) comprises a baffle plate with an incline (9) of at least 30°.
4. Apparatus (1) according to one of claim 2 or 3, wherein the baffle plate comprises a sliding coating.
5. Apparatus (1) according to one of the preceding claims, wherein the height (10) of the collecting space (7) amounts to at least 20 cm.
6. Apparatus (1) according to claim 1, wherein the mechanical material removers (11) are arranged on the conveying means (3).
7. Apparatus (1) according to claim 1 or 6, wherein the conveying means (3) has at least one mechanical material remover (11) from the following group: scraper, brush, rake.
8. Apparatus (1) according to one of the preceding claims, having a feed region (15) and a dispensing region (16).
9. Apparatus (1) according to claim 1, wherein the conveying means (3) or the mechanical material removers (11) are formed at least partially of metal.
10. Apparatus (1) according to one of the preceding claims, wherein the material (2) is conveyable by the conveying means (3) from a material store (12) to a combustion chamber (14) of a combustion boiler (13).
11. Apparatus (1) according to one of the preceding claims, having at least one detecting means (17) for:

    a) the filling level of the collecting space (7), and/or

    b) the temperature of the material (2), and/or

    c) the gas composition in the region of the conveying means (3).
12. Apparatus (1) according to one of the preceding claims, having at least one extinguishing device (18).
13. Apparatus (1) according to claim 12, having at least one extinguishing control (19), the extinguishing control (19) being adjusted for activating the at least one extinguishing device (19).
14. Apparatus (1) according to one of the preceding claims, wherein the conveying means (3) can be arranged at least partially in a housing (20).
15. Apparatus (1) according to one of claims 6 to 14, wherein a distance (24) between the mechanical material removers (11) and a bottom (21) of the collecting space (7) amounts to 5 mm to 50 mm.
16. Apparatus (1) according to one of the preceding claims, having an extraction container (22) for the reception of material (2) removed from the collecting space (7).
17. Use of the apparatus (1) according to one of the preceding claims for the transport of coal and/or pyrite.

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