A dust suppression device for coal conveying system

Abstract

The utility model provides a dust suppression device for a coal transportation system. The dust suppression device for a coal transportation system includes a conveyor belt, a crusher and a dust collector. A guide trough is provided on the conveyor belt cover. The feed pipe of the crusher passes through the guide trough and extends to the top of the conveyor belt. An airflow guide buffer box, a dust hood and an airflow guide pressure reduction box are sequentially provided above the guide trough and behind the feed pipe from front to back. The dust suppression device for a coal transportation system provided by the utility model forms a feeding channel on the conveyor belt by providing a guide trough on the conveyor belt. Airflow buffering and vacuum dust removal are performed twice in the feeding channel. Under the action of four sets of curtains at the front and rear ends, the airflow containing coal powder is repeatedly blocked and buffered, the flow rate and pressure of the airflow are reduced, and the coal powder contained in the airflow is allowed to settle on the conveyor belt, so as to reduce the dust content in the airflow to the greatest extent, thereby avoiding the occurrence of dust spraying, greatly improving the working environment around the coal transportation system, and reducing dust pollution.

Description

Technical Field

[0001] The utility model relates to the field of dust suppression devices, in particular to a dust suppression device for a coal conveying system. Background Art

[0002] Many thermal power plants, coal mines, chemical companies and other enterprises need to use coal and coal powder as fuel, and need to use a coal conveying system composed of crushers, conveyor belts and other equipment for transportation. During the material dropping process of the coal conveying system, due to factors such as the height difference of the material dropping or the crushing equipment, a certain positive pressure airflow will be formed when the coal falls onto the conveyor belt, causing the coal powder to spray out from the belt conveyor, causing the coal to scatter on the coal conveyor trestle, affecting the surrounding environment and threatening the health of the operators. The commonly used dust suppression method is to install a spray dust reduction system on the coal conveyor belt to reduce dust by spraying. On the one hand, this method consumes a lot of water resources, and on the other hand, the sewage generated by the spray dust reduction needs to be subsequently treated before it can be discharged. Therefore, there are some shortcomings in its use.

[0003] Therefore, it is necessary to provide a dust suppression device for a coal conveying system to solve the above technical problems. Utility Model Content

[0004] The utility model provides a dust suppression device for a coal conveying system, which solves the problem that during the material dropping process of the coal conveying system, due to factors such as material drop height difference or crushing equipment, a certain positive pressure airflow is formed at the moment when the coal falls onto the conveyor belt, causing coal powder to be sprayed out from the belt conveyor, causing coal to be scattered on the coal conveying trestle and affecting the surrounding environment.

[0005] In order to solve the above technical problems, the utility model provides a dust suppression device for a coal transportation system, including a conveyor belt, a crusher and a dust collector. The conveyor belt is covered with a material guide trough, and a discharge pipe of the crusher passes through the material guide trough and extends to the top of the conveyor belt. Above the material guide trough, an airflow guide buffer box, a dust hood and an airflow guide pressure reduction box are sequentially arranged from front to back behind the discharge pipe. The front and rear ends of the airflow guide buffer box are respectively opened and communicated with the inner cavity of the material guide trough respectively, the dust hood is communicated with the inner cavity of the material guide trough, the dust hood is connected to the air inlet of the dust collector through a negative pressure pipe, and the front and rear ends of the airflow guide pressure reduction box are both open and communicated with the inner cavity of the material guide trough.

[0006] Preferably, a front curtain box is provided on the material guide trough in front of the discharge pipe, and a first curtain extending to the top of the conveyor belt is provided in the front curtain box.

[0007] Preferably, a rear curtain box is provided on the material guide trough behind the airflow guide and pressure relief box, and a second curtain extending to the top of the conveyor belt is provided in the rear curtain box.

[0008] Preferably, the dust collector is a cartridge dust collector.

[0009] Preferably, the front end and the rear end of the inner cavity of the material guide trough are respectively provided with a head curtain and an outlet curtain.

[0010] Preferably, a buffer air lock is provided on the feed pipe of the crusher.

[0011] Compared with the related art, the dust suppression device for the coal conveying system provided by the utility model has the following beneficial effects:

[0012] The utility model provides a dust suppression device for a coal conveying system. A material guide trough is arranged on the conveyor belt to form a material conveying channel on the conveyor belt, and air flow buffering and air exhaust dust removal are performed twice in the material conveying channel. Under the action of four sets of curtains at the front and rear ends, the air flow containing coal powder is repeatedly blocked and buffered, the flow rate and pressure of the air flow are reduced, and the coal powder contained in the air flow is allowed to settle on the conveyor belt, thereby reducing the dust content in the air flow to the greatest extent, thereby avoiding dust spraying, greatly improving the working environment around the coal conveying system, reducing dust pollution, reducing damage to operators, and making the coal conveying system more environmentally friendly and safe. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 A schematic structural diagram of a preferred embodiment of a dust suppression device for a coal conveying system provided by the utility model;

[0014] Figure 2 It is a schematic diagram of the external structure of the utility model.

[0015] Numbers in the figure: 1. Conveyor belt, 2. Material guide trough, 3. Front curtain box, 4. Crusher, 5. Buffer air lock, 6. Air flow guide buffer box, 7. Dust collector, 8. Negative pressure pipe, 9. Dust hood, 10. Air flow guide pressure reducing box, 11. Rear curtain box, 12. Head curtain, 13. Exit curtain. DETAILED DESCRIPTION

[0016] The utility model is further described below in conjunction with the accompanying drawings and implementation modes.

[0017] Please refer to Figure 1 and Figure 2 ,in, Figure 1 A schematic structural diagram of a preferred embodiment of a dust suppression device for a coal conveying system provided by the utility model; Figure 2The figure is a schematic diagram of the external structure of the utility model. The dust suppression device of the coal conveying system includes a conveyor belt 1, a crusher 4 and a dust collector 7. The conveyor belt 1 is covered with a guide trough 2. The feed pipe of the crusher 4 passes through the guide trough 2 and extends to the top of the conveyor belt 1. Above the guide trough 2, an airflow guide buffer box 6, a dust hood 9 and an airflow guide pressure reduction box 10 are sequentially arranged from front to back behind the feed pipe. The front and rear ends of the airflow guide buffer box 6 are respectively opened and communicated with the inner cavity of the guide trough 2. The dust hood 9 is communicated with the inner cavity of the guide trough 2. The dust hood 9 is communicated with the air inlet of the dust collector 7 through a negative pressure pipe 8. The front and rear ends of the airflow guide pressure reduction box 10 are both open and communicated with the inner cavity of the guide trough 2.

[0018] The conveyor belt 1 is tilted upward from front to back, and both sides of the guide trough 2 are fixedly connected to the bracket of the conveyor belt 1, so that a closed cavity is formed above the conveyor belt 1, and the two ends of the cavity are open. The material in the crusher 4 falls through the discharge pipe and falls onto the conveyor belt 1, and the airflow containing coal powder will move along the inner cavity of the guide trough 2 to the upper and lower ends.

[0019] A front curtain box 3 is provided on the material guide chute 2 in front of the material discharge pipe, and a first curtain extending to the top of the conveyor belt 1 is provided in the front curtain box 3. A head curtain 12 is provided at the front end of the inner cavity of the material guide chute 2.

[0020] As the coal conveyor belt transports upward, the positive-pressure airflow containing coal powder moves mostly upward as the belt runs, and a small part moves downward. The downward part of the airflow is blocked by the first curtain of the front curtain box 3 and the head curtain at the front end of the inner cavity of the guide trough 2, the airflow pressure is reduced, and most of the coal powder contained in the airflow is blocked and falls onto the conveyor belt 1, basically eliminating the situation of positive-pressure coal injection at the front end.

[0021] The guide trough 2 is provided with a rear curtain box 11 behind the airflow decompression box 10, and a second curtain extending to the top of the conveyor belt 1 is provided in the rear curtain box 11. An outlet curtain 13 is provided at the rear end of the inner cavity of the guide trough 2.

[0022] The upward part of the airflow moves upward along the cavity. When the airflow pressure is too large, part of the airflow will flow into the airflow guide buffer box 6 for temporary buffering to play a buffering role, reduce the airflow pressure in the inner cavity of the guide trough 2, and reduce the kinetic energy of the airflow. The airflow in the inner cavity of the guide trough 2 continues to move upward. When it passes through the position of the dust hood 9, under the suction force of the dust collector 7, a negative pressure is formed near the position below the dust hood 9. The airflow with dust will be sucked into the dust collector 7 for dust removal. Therefore, the airflow pressure in the inner cavity of the guide trough 2 gradually decreases. At the same time, under the action of the negative pressure, the gas in the airflow guide buffer box 6 will gradually The dust gradually flows out and is sucked away. After the dust collector 7 exhausts air and removes dust, a part of the airflow is eliminated and the coal powder content in the airflow is reduced. The remaining airflow continues to flow backward, and a part of it flows into the airflow guide and pressure reducing box 10 again to play a buffering role, further reducing the airflow pressure, and then blocked twice by the second curtain 11 in the rear curtain box 11 and the outlet curtain 8. The pressure and flow rate of the airflow are further reduced to near zero. At the same time, the dust is blocked and settles on the conveyor belt 1. The coal powder content in the airflow is extremely small, so that no dust spray is formed when the rear end discharges coal, which greatly reduces the environmental pressure of the trestle and avoids dust pollution.

[0023] The dust collector 7 is a cartridge type dust collector.

[0024] The feed pipe of the crusher 4 is provided with a buffer air lock 5. The baffle of the buffer air lock 5 is arranged in the feed pipe, which can block the falling coal or slow down the falling coal speed, thereby slowing down the downward air flow speed and reducing the air flow pressure, thereby reducing the pressure of the air flow when it flows into the guide trough 2.

[0025] Compared with the related art, the dust suppression device for the coal conveying system provided by the utility model has the following beneficial effects: by arranging a material guide trough 2 on the conveyor belt 1, a conveying channel is formed on the conveyor belt 1, and air flow buffering and vacuum dust removal are performed twice in the conveying channel, and under the action of four sets of curtains at the front and rear ends, the airflow containing coal powder is repeatedly blocked and buffered, the flow rate and pressure of the airflow are reduced, and the coal powder contained in the airflow is caused to settle on the conveyor belt 1, thereby minimizing the dust content in the airflow, thereby avoiding dust spraying, greatly improving the working environment around the coal conveying system, reducing dust pollution, and reducing damage to operators.

[0026] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A dust suppression device for a coal conveying system, characterized in that: The utility model comprises a conveyor belt (1), a crusher (4) and a dust collector (7); a guide trough (2) is provided on the upper cover of the conveyor belt (1); a feed pipe of the crusher (4) passes through the guide trough (2) and extends to the upper part of the conveyor belt (1); an air flow guide buffer box (6), a dust hood (9) and an air flow guide pressure reduction box (10) are arranged in sequence from front to rear above the guide trough (2) and behind the feed pipe; the front and rear ends of the air flow guide buffer box (6) are respectively opened and communicated with the inner cavity of the guide trough (2); the dust hood (9) is communicated with the inner cavity of the guide trough (2); the dust hood (9) is communicated with the air inlet of the dust collector (7) through a negative pressure pipe (8); the front and rear ends of the air flow guide pressure reduction box (10) are both open and communicated with the inner cavity of the guide trough (2).

2. The dust suppression device for coal transportation system according to claim 1, characterized in that: A front curtain box (3) is provided on the material guide trough (2) in front of the material discharge pipe, and a first curtain extending to the top of the conveyor belt (1) is provided in the front curtain box (3).

3. The dust suppression device for coal transportation system according to claim 1, characterized in that: A rear curtain box (11) is arranged on the material guide trough (2) behind the airflow guide and pressure relief box (10), and a second curtain extending to the top of the conveyor belt (1) is arranged in the rear curtain box (11).

4. The dust suppression device for coal transportation system according to claim 1, characterized in that: The dust collector (7) is a cartridge type dust collector.

5. The dust suppression device for coal transportation system according to claim 1, characterized in that: The front end and the rear end of the inner cavity of the material guide trough (2) are respectively provided with a head blocking curtain (12) and an outlet blocking curtain (13).

6. The dust suppression device for coal transportation system according to claim 1, characterized in that: A buffer air lock (5) is provided on the feed pipe of the pulverizer (4).

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