Circulation pressure relief and dust suppression device for screening machine and coal crusher

Abstract

The utility model provides a screening machine and coal crusher circulation pressure relief dust suppression device which comprises a conveying belt and an anti-escape apron board, the anti-escape apron board is installed on one side of the conveying belt, one side of the anti-escape apron board is communicated with a first coal falling pipe and a second coal falling pipe respectively, one end of the second coal falling pipe is communicated with a coal crusher, and the other end of the second coal falling pipe is communicated with a conveying belt. One side of the coal crusher is communicated with a connecting pipe, one side of the connecting pipe is communicated with a circulating pipe, and a coal crusher circulating pressure relief device is mounted on one side of the anti-escape apron board; the coal flow centralized control device, the dust suppression guide chute and the anti-escape apron board are used for solving the problem of serious dust raising at transfer points of the roller screen and the coal crusher, so that the dust raising at all dust source points of a belt is effectively eliminated, and the sanitary standard of a coal conveying gallery space reaches the standard; when high-speed dust airflow generated by coal falling of the screening machine encounters the coal dust shunting device of the dust suppression device, dust gas is shunted and restrained in the dust suppression device of the screening machine to perform circulation motion.

Description

Technical Field

[0001] The utility model relates to a dust suppression device, in particular to a dust suppression device for a screening machine and a coal crusher with circulating flow relief, and belongs to the technical field of dust suppression devices. Background Art

[0002] The process of dividing bulk materials into different particle sizes through one or several layers of screens is called screening. Screening machine is a vibrating screening machine that utilizes the relative movement between bulk materials and the screen surface to allow some particles to pass through the screen holes, and divides materials such as sand, gravel, and crushed stone into different grades according to particle size. Coal pulverizer is referred to as coal crusher, which is one of the commonly used equipment in coal crushing and coal gangue crushing production lines. Coal pulverizer is improved on the basis of the old hammer crusher, and is a new type of coal pulverizer. When screening machines and coal crushers are used, dust suppression equipment is needed to control dust. The existing dust control is mainly divided into two schools of thought: emission control technology and source control technology, including closed dust removal, filtration dust removal, electrostatic precipitator, water spray or spray dust removal, bio-nanofilm dust suppression and other solutions. The dust removal efficiency is better with electrostatic precipitator and bio-nanofilm dust suppression. In terms of purchase and use costs, bio-nanofilm dust suppression is more economical than electrostatic precipitator.

[0003] When the existing dust suppression equipment is applied to the screening machine and coal crusher, the roller screen and coal crusher transfer points are seriously dusty, and there are many dust sources on the belt, resulting in the failure to meet the sanitation standards of the coal conveying corridor space;

[0004] In order to solve the above technical problems, a screening machine and coal crusher circulating flow relief and dust suppression device is proposed. Utility Model Content

[0005] In view of this, the utility model provides a circulating dust suppression device for a screening machine and a coal crusher to solve or alleviate the technical problems existing in the prior art and at least provide a beneficial option.

[0006] The technical solution of the utility model is implemented as follows: a circulating flow pressure relief and dust suppression device for a screening machine and a coal crusher comprises a conveyor belt and an anti-escape skirt, the anti-escape skirt is installed on one side of the conveyor belt, one side of the anti-escape skirt is respectively connected with a first coal dropping pipe and a second coal dropping pipe, one end of the second coal dropping pipe is connected with a coal crusher, one side of the coal crusher is connected with a connecting pipe, one side of the connecting pipe is connected with a circulating flow pipe, a circulating flow pressure relief device for a coal crusher is installed on one side of the anti-escape skirt, and one end of the circulating flow pipe is connected with the circulating flow pressure relief device for a coal crusher.

[0007] Further preferably, an adjustable tail sealing box is installed on one side of the anti-escape skirt.

[0008] Further preferably, a non-powered electrostatic dust suppression device is installed on one side of the anti-escape skirt.

[0009] Further preferably, a second manhole door is installed on one side of the coal crusher circulation pressure relief device.

[0010] Further preferably, a material guide trough is integrally formed on one side of the anti-escape skirt plate, and four coal dust diversion devices are installed on one side of the anti-escape skirt plate.

[0011] Further preferably, a roller screen circulation pressure relief device and a coal crusher auxiliary circulation pressure relief device are respectively installed on one side of the anti-escape skirt plate, and a first manhole door and a third manhole door are respectively installed on one side of the roller screen circulation pressure relief device and the coal crusher auxiliary circulation pressure relief device.

[0012] The embodiment of the utility model has the following advantages due to the adoption of the above technical solution:

[0013] The utility model solves the problem of serious dust at the transfer points of roller screens and coal crushers through a coal flow centralized control device, a dust suppression material guide trough and an anti-escape skirt plate, effectively eliminates dust at all dust source points of the belt, and ensures that the sanitation standard of the coal conveying corridor space meets the standard. A roller screen circulation pressure relief device is installed at the front end of the screening machine drop pipe. When the high-speed dust airflow generated by the screening machine dropping coal encounters the coal dust diversion device of the dust suppression device, the dust gas is diverted out and constrained in the dust suppression device of the screening machine to perform a circulation movement.

[0014] The above summary is for the purpose of description only and is not intended to be limiting in any way. In addition to the illustrative aspects, embodiments and features described above, further aspects, embodiments and features of the utility model will be readily apparent by reference to the accompanying drawings and the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0016] Figure 1 It is a structural diagram of the utility model;

[0017] Figure 2 It is a side structural diagram of the utility model;

[0018] Figure 3 This is a bottom view of the structure of the utility model;

[0019] Figure 4 It is a partial cross-sectional structural diagram of the utility model.

[0020] Figure numerals: 11, conveyor belt; 12, anti-escape skirt; 13, first coal drop pipe; 14, roller screen circulation pressure relief device; 15, second coal drop pipe; 16, coal crusher circulation pressure relief device; 17, coal crusher auxiliary circulation pressure relief device; 18, unpowered electrostatic dust suppression device; 19, coal crusher; 21, circulation pipe; 22, connecting pipe; 23, adjustable tail sealing box; 24, first manhole door; 25, second manhole door; 26, third manhole door; 27, coal dust diversion device; 28, material guide chute. DETAILED DESCRIPTION

[0021] In the following, only some exemplary embodiments are briefly described. As those skilled in the art will appreciate, the described embodiments may be modified in various ways without departing from the spirit or scope of the present invention. Therefore, the drawings and descriptions are considered to be exemplary and non-restrictive in nature.

[0022] The embodiments of the present utility model are described in detail below with reference to the accompanying drawings.

[0023] like Figure 1-4As shown, the embodiment of the utility model provides a dust suppression device for a screening machine and a coal crusher with an annular flow relief device, including a conveyor belt 11 and an anti-escape skirt 12. A material guide trough 28 is integrally formed on one side of the anti-escape skirt 12. A small amount of dust gas leaking through the gap between materials on the belt merges with the high-speed dust airflow of the coal crusher 19 and moves forward rapidly in the material guide trough 28, and enters the annular flow pressure relief chamber of the coal crusher. Under the action of the dust suppression system, the kinetic energy of the dust gas is consumed in large quantities, and most of the dust settles down and falls on the conveyor belt 11, and is transported away with the material. The gas returns to the hammer chamber of the coal crusher 19 through a pipeline to form a closed-loop circulation. The anti-escape skirt plate 12 is installed on one side of the conveyor belt 11. One side of the anti-escape skirt plate 12 is respectively connected with a first coal dropping pipe 13 and a second coal dropping pipe 15. One end of the second coal dropping pipe 15 is connected with the coal crusher 19. The first coal dropping pipe 13 is connected to the screening machine. A roller screen circulation pressure relief device 14 is installed at the front end of the first coal dropping pipe 13. A first manhole door 24 is installed on one side of the roller screen circulation pressure relief device 14. Four coal dust diversion devices are installed on one side of the anti-escape skirt plate 12. Device 27, when the high-speed dust airflow generated by the falling coal of the screening machine encounters the coal dust diversion device 27 of the dust suppression device, the dust gas is diverted and constrained to circulate in the dust suppression device of the screening machine. Under the action of the dust suppression system, the kinetic energy of the dust gas is consumed in large quantities, and the dust settles because the kinetic energy is insufficient to provide the power for its continued floating, and falls back to the surface of the material and is transported away together. One side of the coal crusher 19 is connected to a connecting pipe 22, and one side of the connecting pipe 22 is connected to a circulation pipe 21. One side of the anti-escape skirt plate 12 is equipped with a coal crusher circulation drain A second manhole door 25 is installed on one side of the coal crusher circulation pressure relief device 16, one end of the circulation pipe 21 is connected with the coal crusher circulation pressure relief device 16, and the coal crusher circulation pressure relief chamber is connected with the second coal dropping pipe 15 through the circulation pipe 21. Due to the continuous falling of materials, the bottom of the second coal dropping pipe 15 is in a depressurized state, and the gas in the circulation chamber continuously flows to the second coal dropping pipe 15 through the circulation pipe 21, resulting in a slight negative pressure at the outlet of the circulation chamber and the material guide trough 28, and the dust gas cannot move against the airflow, thereby eliminating the stubborn problem of dust spraying.

[0024] In one embodiment, an adjustable tail sealing box 23 is installed on one side of the anti-escape skirt plate 12. Good sliding sealing measures effectively block the dust gas channel and prevent dust from escaping from the tail end of the material guide trough 28. An unpowered electrostatic dust suppression device 18 is installed on one side of the anti-escape skirt plate 12. The unpowered electrostatic dust suppression device 18 absorbs trace dust generated by the disturbance of the dust diverter in the circulation chamber and separates it from the air, thereby ensuring that no dust will escape from the front end of the material guide trough 28.

[0025] In one embodiment, a coal crusher secondary circulation pressure relief device 17 is installed on one side of the anti-escape skirt plate 12, and a third manhole door 26 is installed on one side of the coal crusher secondary circulation pressure relief device 17. A small amount of fine dust gas leaks out into the secondary circulation chamber for circulation movement. Under the action of the dust suppression system, the kinetic energy of the dust gas is consumed in large quantities, and the dust settles due to insufficient kinetic energy and falls back to the surface of the material and is transported away together.

[0026] When the utility model is working: a roller screen circulating pressure relief device 14 is installed at the front end of the first coal dropping pipe 13. When the high-speed dust airflow generated by the coal dropping of the screening machine encounters the coal dust diversion device 27 of the dust suppression device, the dust gas is diverted and constrained to perform circulating motion in the dust suppression device of the screening machine. Under the action of the dust suppression system, the kinetic energy of the dust gas is greatly consumed. The dust settles because the kinetic energy is insufficient to provide the power for its continued floating, and falls back to the surface of the material and is transported away together. A small amount of dust gas that leaks through the gap between materials on the conveyor belt 11 merges with the high-speed dust airflow of the coal crusher 19 and moves forward rapidly in the guide trough 28, and enters the circulating pressure relief chamber of the coal crusher. Under the action of the dust suppression system, the kinetic energy of the dust gas is greatly consumed. Most of the dust settles and falls on the conveyor belt 11 and is transported away with the material. The gas returns to the circulating pressure relief chamber of the coal crusher 19 through the pipeline. Hammer chamber, forming a closed loop; a small amount of fine dust gas leaks out and enters the secondary circulation chamber for circulation motion. Under the action of the dust suppression system, the kinetic energy of the dust gas is consumed in large quantities, and the dust settles due to insufficient kinetic energy, falls back to the surface of the material and is transported away together; the coal crusher circulation pressure relief chamber is connected to the second coal drop pipe 15 through the circulation pipe 21. Due to the continuous falling of the material, the bottom of the second coal drop pipe 15 is in a depressurized state. The gas in the circulation chamber continuously flows to the second coal drop pipe 15 through the circulation pipe 21, resulting in a slight negative pressure at the outlet of the circulation chamber and the guide trough 28. The dust gas cannot move against the airflow, thereby eliminating the stubborn problem of dust spraying; the unpowered electrostatic dust reduction device 18 arranged at the front end of the guide trough 28 absorbs the trace dust generated by the disturbance of the dust diverter in the circulation chamber and separates it from the air, thereby ensuring that no dust escapes from the front end of the guide trough 28. An adjustable tail sealing box 23 is provided at the tail end of the material guide trough 28 . Good sliding sealing measures effectively block the dust gas passage and prevent dust leakage at the tail end of the material guide trough 28 .

[0027] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can easily think of various changes or substitutions within the technical scope disclosed by the utility model, which should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. Screening machine and coal crusher circulation discharge and dust suppression device, characterized by: The invention comprises a conveyor belt (11) and an anti-escape skirt plate (12), wherein the anti-escape skirt plate (12) is installed on one side of the conveyor belt (11), one side of the anti-escape skirt plate (12) is respectively connected to a first coal dropping pipe (13) and a second coal dropping pipe (15), one end of the second coal dropping pipe (15) is connected to a coal crusher (19), one side of the coal crusher (19) is connected to a connecting pipe (22), one side of the connecting pipe (22) is connected to a circulating pipe (21), a coal crusher circulating pressure relief device (16) is installed on one side of the anti-escape skirt plate (12), and one end of the circulating pipe (21) is connected to the coal crusher circulating pressure relief device (16).

2. The screening machine and coal crusher circulation discharge and dust suppression device according to claim 1, characterized in that: An adjustable tail sealing box (23) is installed on one side of the anti-escape skirt plate (12).

3. The circulating flow dust suppression device for screening machine and coal crusher according to claim 1 is characterized by: A non-powered electrostatic dust reduction device (18) is installed on one side of the anti-escape skirt plate (12).

4. The circulating flow dust suppression device for screening machine and coal crusher according to claim 1, characterized in that: A second manhole door (25) is installed on one side of the coal crusher circulation pressure relief device (16).

5. The circulating flow dust suppression device for screening machine and coal crusher according to claim 1, characterized in that: A material guide trough (28) is integrally formed on one side of the anti-escape skirt plate (12), and four coal dust diversion devices (27) are installed on one side of the anti-escape skirt plate (12).

6. The circulating flow dust suppression device for screening machine and coal crusher according to claim 1, characterized in that: A roller screen circulation pressure relief device (14) and a coal crusher auxiliary circulation pressure relief device (17) are respectively installed on one side of the anti-escape skirt plate (12), and a first manhole door (24) and a third manhole door (26) are respectively installed on one side of the roller screen circulation pressure relief device (14) and the coal crusher auxiliary circulation pressure relief device (17).

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