Air exhaust flow equalizing device for mine ventilation air methane dust removal and pulverized coal recovery system

Abstract

The utility model is applicable to the technical field of industrial exhaust air treatment, and provides an exhaust air flow equalizing device for a mine ventilation air methane dust removal and pulverized coal recovery system, which comprises a cylindrical flow equalizing air drum, and the surface of one side of the flow equalizing air drum is transversely communicated with a communicating pipe. According to the air exhausting and flow equalizing device for the mine ventilation air methane dust removal and pulverized coal recovery system, the air equalizing air drum and the multiple air equalizing air pipes are arranged, the device can be applied to the mine ventilation air methane dust removal and pulverized coal recovery system in actual use, and the bottom ends of the multiple air equalizing air pipes of the device can be immersed into water of a pulverized coal absorption pool in the system; mine ventilation air methane enters the uniform-flow air drums through the communicating pipes and then is discharged through the uniform-flow air pipes, pulverized coal in the mine ventilation air methane can be adhered and absorbed by water, and gas can be directly discharged, so that the pulverized coal can be prevented from polluting air, then the pulverized coal in the pool can be recycled, haze is reduced, and harm to the environment is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of industrial exhaust air treatment, and in particular relates to an exhaust air flow equalizing device for a mine exhaust air dust removal and coal powder recovery system. Background Art

[0002] In order to ensure safety and ventilation during the coal mine production process, a large amount of air is sent into the mine by a powerful air compressor to dilute the gas concentration underground and ensure the breathing needs of personnel. The air passes through the mining tunnel and is discharged from another air outlet. This is the mine exhaust air. The mine exhaust air generally has a huge and constant air volume. Even if dust reduction treatment is done during the mining process, the exhaust air still contains a large amount of coal ash dust.

[0003] Due to various reasons such as cost or immature technology, most existing coal mines directly emit exhausted air into the atmosphere, which easily causes haze and is extremely harmful to human health and the environment, with poor environmental protection, comfort and economy. Utility Model Content

[0004] The utility model provides an exhaust air flow equalizing device for mine exhaust air dust removal and coal powder recovery system, aiming to solve the problems that most existing coal mines directly discharge exhaust air into the atmosphere due to various reasons such as cost or immature technology, which easily causes haze, has great harm to human health and the environment, and has poor environmental protection, comfort and economy.

[0005] The utility model is implemented as follows: an exhaust flow equalizing device for a mine exhaust dust removal and coal powder recovery system comprises a cylindrical flow equalizing air drum, one side surface of the flow equalizing air drum is horizontally connected with a connecting pipe, a bottom end of the flow equalizing air drum is vertically penetrated with a plurality of air outlet holes, a mounting ring matching the outer diameter profile of the air outlet holes is fixedly connected to the lower surface of the flow equalizing air drum and located at the positions of the plurality of air outlet holes, and the bottom ends of the plurality of mounting rings are detachably mounted with flow equalizing air ducts.

[0006] Preferably, the inner ring surfaces of the plurality of mounting rings are all provided with internal threads.

[0007] Preferably, the top ends of the outer surfaces of the plurality of flow-balancing air ducts are each provided with an external thread matched with the internal thread, and the flow-balancing air duct is detachably mounted on the bottom end of the mounting ring via the external thread.

[0008] Preferably, the other end of the connecting pipe is fixedly connected with a flange.

[0009] Preferably, the plurality of flow-balancing air ducts are all made of stainless steel.

[0010] Beneficial Effects

[0011] Compared with the prior art, the beneficial effects of the utility model are as follows: the utility model is an exhaust flow equalizing device for mine exhaust air dust removal and coal powder recovery system. By setting an equalizing air blower and multiple equalizing air ducts, the device will be applied to mine exhaust air dust removal and coal powder recovery system in actual use. The bottom ends of the multiple equalizing air ducts of the device will be immersed in the water of the coal powder absorption pool in the system. After the mine exhaust air enters the equalizing air blower through the connecting pipe, it will be discharged through multiple equalizing air ducts. The coal powder therein will be adhered and absorbed by the water, while the gas will be discharged directly, thereby preventing the coal powder from polluting the air. The coal powder in the pool can be recovered afterwards, reducing haze, reducing harm to the environment, improving environmental protection and living comfort, while reducing resource waste and improving economic efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the overall side view structure of the utility model;

[0013] Figure 2 This is a schematic diagram of the bottom structure of the flow-equalizing wind drum of the utility model;

[0014] Figure 3 This is a schematic diagram of the connection structure between the mounting ring and the flow-equalizing air duct of the utility model;

[0015] Figure 4 It is a schematic diagram of the application of the utility model in a mine ventilation dust removal and coal powder recovery system.

[0016] In the figure: 1-flow-equalizing air drum, 2-connecting pipe, 3-flange, 4-air outlet, 5-mounting ring, 6-internal thread, 7-flow-equalizing air duct, 8-external thread, 9-coal powder absorption tank, 10-wastewater sedimentation tank, 11-coal slime filter press making machine, 12-wastewater treatment centrifuge, 13-clean water storage tank. DETAILED DESCRIPTION

[0017] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0018] See also Figure 1-4 The utility model provides a technical solution: an exhaust flow equalizing device for a mine exhaust dust removal and coal powder recovery system, comprising a cylindrical equalizing air drum 1, a connecting pipe 2 is horizontally connected to the surface of one side of the equalizing air drum 1, a plurality of air outlet holes 4 are vertically penetrated through the bottom end of the equalizing air drum 1, and mounting rings 5 ​​that are adapted to the outer diameter profile of the air outlet holes 4 are fixedly connected to the lower surface of the equalizing air drum 1 and located at the positions of the plurality of air outlet holes 4, and the bottom ends of the plurality of mounting rings 5 ​​are detachably mounted with equalizing air ducts 7.

[0019] In this embodiment, the device is directly used in the mine exhaust air dust removal and coal powder recovery system, which mainly includes a coal powder absorption tank 9, a sewage sedimentation tank 10 and a clean water storage tank 13. In actual use, the bottom ends of the multiple flow-balancing air ducts 7 of the device will be immersed in the water of the coal powder absorption tank 9 in the system. After the mine exhaust air enters the flow-balancing air drum 1 through the connecting pipe 2, it will be discharged through the multiple flow-balancing air ducts 7. The coal powder therein will be adhered and absorbed by the water, and the gas will be discharged directly, thereby preventing the coal powder from polluting the air. The coal powder in the pool can then be recovered, reducing haze, reducing harm to the environment, improving environmental protection and living comfort, while reducing resource waste and improving economic efficiency.

[0020] The sewage in the pulverized coal absorption tank 9 will be discharged into the sewage sedimentation tank 10 through a pipeline at a regular and quantitative manner, and will be precipitated inside the sewage. The precipitated sewage will be stratified, with coal slime forming at the bottom layer and coal powder suspension at the upper layer. At this time, the coal slime at the bottom layer and the suspension at the upper layer can be sent to the coal slime filter press maker 11 and the sewage treatment centrifuge 12 respectively through two pipelines. The coal slime produced after being treated by the sewage treatment centrifuge 12 will also be sent to the coal slime filter press maker 11, and the coal slime will be treated by the coal slime filter press maker 11 to reach a usable level. The water without the coal slime will return to the clean water storage tank 13 through the pipeline, and a pipeline is also connected between the clean water storage tank 13 and the pulverized coal absorption tank 9, so that clean water can be sent to the pulverized coal absorption tank 9 when needed to realize circulation operation.

[0021] The specific bending radius, pipeline length and pipe diameter of the equalizing air duct 7 in the present application need to be processed according to the actual exhaust air flow rate, exhaust air dust concentration and wind pressure calculation. One specification of equalizing air duct 7 is adapted to a mine. Since the exhaust air parameters of a coal mine are generally constant, a coal mine project only needs one specification of equalizing air duct 7 for general use.

[0022] Furthermore, the inner surfaces of the plurality of mounting rings 5 ​​are all provided with internal threads 6 .

[0023] The top ends of the outer surfaces of the plurality of flow-balancing air ducts 7 are all provided with external threads 8 matched with the internal threads 6 , and the flow-balancing air ducts 7 are detachably mounted on the bottom ends of the mounting rings 5 ​​via the external threads 8 .

[0024] In this embodiment, since the equalizing air duct 7 is in direct contact with the sewage in the coal powder absorption tank 9, it is easy to become dirty and blocked after working for a long time and needs to be replaced regularly. Therefore, the equalizing air duct 7 and the equalizing air drum 1 are designed to be threadedly connected to facilitate replacement and maintenance.

[0025] Furthermore, the other end of the connecting pipe 2 is fixedly connected with a flange 3 .

[0026] In this embodiment, the flange 3 is used to connect with the mine air outlet, and a square or round flange 3 can be selected according to the actual situation of the mine air outlet.

[0027] Furthermore, the plurality of flow-balancing air ducts 7 are all made of stainless steel.

[0028] In this embodiment, the stainless steel material has strong corrosion resistance and a long service life, thereby reducing the replacement frequency of the flow-balanced air duct 7 .

[0029] Working principle and use process of the utility model: After the utility model is installed, the device is directly used in the mine exhaust air dust removal and coal powder recovery system. In actual use, the bottom ends of the multiple flow-equalizing air ducts 7 of the device will be immersed in the water of the coal powder absorption pool 9 in the system. The mine exhaust air enters the flow-equalizing air drum 1 through the connecting pipe 2 and is discharged through the multiple flow-equalizing air ducts 7. The coal powder therein will be adhered and absorbed by the water, and the gas will be discharged directly, thereby preventing the coal powder from polluting the air. The coal powder in the pool can be recovered afterwards, reducing haze, reducing harm to the environment, improving environmental protection and living comfort, while reducing resource waste and improving economic efficiency.

[0030] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An exhaust air flow equalizing device for a mine exhaust air dust removal and coal powder recovery system, the exhaust air flow equalizing device comprising a flow equalizing air drum (1), a connecting pipe (2) and a flow equalizing air duct (7), characterized in that: A connecting pipe (2) is laterally connected to a surface of one side of the flow-distributing wind drum (1); A plurality of air outlet holes (4) are vertically penetrated at the bottom end of the flow-distributing air drum (1), and a mounting ring (5) matching the outer diameter profile of the air outlet holes (4) is fixedly connected to the lower surface of the flow-distributing air drum (1) and located at the positions of the plurality of air outlet holes (4); The bottom ends of the plurality of mounting rings (5) are all detachably mounted with flow-averaging air ducts (7).

2. The exhaust air flow equalizing device for mine ventilation dust removal and coal powder recovery system according to claim 1, characterized in that: The inner ring surfaces of the plurality of mounting rings (5) are all provided with internal threads (6).

3. The exhaust air flow equalizing device for mine ventilation dust removal and coal powder recovery system according to claim 2, characterized in that: The top ends of the outer surfaces of the plurality of flow-balancing air ducts (7) are each provided with an external thread (8) that matches the internal thread (6), and the flow-balancing air duct (7) is detachably mounted on the bottom end of the mounting ring (5) via the external thread (8).

4. The exhaust air flow equalizing device for mine ventilation dust removal and coal powder recovery system according to claim 1, characterized in that: The other end of the connecting pipe (2) is fixedly connected with a flange (3).

5. The exhaust air flow equalizing device for mine ventilation dust removal and coal powder recovery system according to claim 1, characterized in that: The plurality of flow-distributing air ducts (7) are all made of stainless steel.

6. The exhaust air flow equalizing device for mine ventilation dust removal and coal powder recovery system according to claim 1, characterized in that: The flow-distributing wind drum (1) is cylindrical.

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