Intelligent ventilation system and method for coal mine

Abstract

The invention provides a coal mine intelligent ventilation system and method.The coal mine intelligent ventilation system comprises a pretreatment unit, a detection unit, a removal unit and a mixing unit, the pretreatment unit is connected with an outlet of an air duct, and the detection unit is connected with the pretreatment unit so as to be used for receiving air exhausted by the pretreatment unit; the detection unit comprises a first detection piece, and the first detection piece is used for detecting the concentration of pollutants in air exhausted by the pretreatment unit; the removal unit is connected with the detection unit, and the removal unit is used for removing pollutants in air introduced into the removal unit; the detection unit and the removal unit are connected with the mixing unit, the mixing unit is provided with an air inlet and an air outlet, the air inlet is connected with a roadway ventilation pipeline so that fresh air can be introduced into the mixing unit, and the air in the mixing unit is discharged into a roadway through the air outlet after being mixed. According to the intelligent ventilation system for the coal mine, safe production of the coal mine can be guaranteed, and the safety of underground workers is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of mine ventilation, and in particular to an intelligent ventilation system and method for a coal mine. Background Art

[0002] Mine ventilation systems can be divided into a variety of different ventilation methods according to the different layout of the tunnels, such as zoned ventilation, independent ventilation, etc. Regardless of the ventilation method, the source of fresh air is transported by ventilation equipment and ventilation ducts arranged in the tunnels. However, due to the different working methods of coal mining faces, the waste gas and mining gas generated by each working face have certain differences. Therefore, the air volume required per unit time for different working faces has certain differences.

[0003] The ventilation system in the related technology cannot make fine adjustments to the wind force and air volume for different working faces. During the peak period of mining, the wind force needs to be increased. In order to meet the working faces with high wind force requirements, the overall load of the tunnel ventilation equipment needs to be increased, which leads to the generation of excess wind force on the working faces with low wind force requirements, resulting in a waste of wind force. Therefore, the uneven transmission of wind force makes it impossible to effectively ensure the safe production of the mine, thereby reducing the possibility of safe and healthy work for underground workers. Summary of the invention

[0004] The present invention aims to solve one of the technical problems in the related art to at least a certain extent. To this end, an embodiment of the present invention proposes an intelligent ventilation system for coal mines. The intelligent ventilation system for coal mines can reasonably distribute the wind force of the working face of the mine, ensure the safe production of the mine, and improve the safety of underground workers.

[0005] The intelligent ventilation system for coal mines according to the embodiment of the present invention comprises:

[0006] A pre-treatment unit, the pre-treatment unit is connected to the outlet of the air duct to remove dust from the air discharged from the outlet of the air duct;

[0007] A detection unit, the detection unit is connected to the pre-processing unit and is used to receive the air exhausted by the pre-processing unit, the detection unit includes a first detection element, and the first detection element is used to detect the concentration of pollutants in the air exhausted by the pre-processing unit;

[0008] A removal unit, the removal unit is connected to the detection unit, and the removal unit is used to remove pollutants in the air passing into the removal unit;

[0009] A mixing unit, wherein the detection unit and the removal unit are both connected to the mixing unit, and the mixing unit has an air inlet and an air outlet. The air inlet is connected to the tunnel ventilation duct so as to introduce fresh air into the mixing unit. In the mixing unit, the fresh air is mixed with the air exhausted by the detection unit and / or the removal unit and then discharged into the tunnel through the air outlet.

[0010] The intelligent ventilation system for coal mines of the embodiment of the present invention can detect the dirty air discharged from the wind duct and remove pollutants in the air according to the detection results. The air after removing the pollutants can be used again in some working faces of the mine; or the air with excessively high pollutant content can be directly discharged into the return air lane to ensure the ventilation efficiency of the mine tunnels and working faces.

[0011] In addition, mixing the air without pollutants with fresh air in the mixing unit can not only reduce the pollutant content in the mixed air, but also reduce the demand for fresh air. It not only reduces the operating power of the ventilation equipment, but also supplies fresh air to the working face with high wind demand, which is more conducive to mine production safety and increases the possibility of safe and healthy work for underground personnel.

[0012] In some embodiments, the intelligent ventilation system for coal mines of the embodiments of the present invention further includes a filtering unit, which is connected between the pretreatment unit and the detection unit, and is used to remove nitrogen oxides from the air exhausted by the pretreatment unit.

[0013] In some embodiments, there are multiple removal units, each of which includes a removal element and a second detection element. The second detection element is arranged upstream of the removal unit. The second detection element is used to detect the concentration of pollutants in the air before it enters the removal element. If the concentration of pollutants detected by multiple second detection elements exceeds a preset value, the removal unit will pass the air into the return air duct.

[0014] In some embodiments, the removal unit further includes a third detection element, which is disposed downstream of the removal element and is used to detect the concentration of pollutants in the air discharged from the removal element after the pollutants have been removed.

[0015] In some embodiments, the sum of the air flow rates introduced from the detection unit, the removal unit, and the air inlet to the mixing unit is equal to the air flow rate exhausted from the pretreatment unit.

[0016] The intelligent ventilation method for a coal mine according to an embodiment of the present invention is implemented according to the intelligent ventilation system for a coal mine according to any one of the above embodiments, and is characterized in that it comprises the following steps:

[0017] Pre-treat the turbid air discharged from the air duct outlet;

[0018] Detect whether the concentration of pollutants in the air exceeds the preset value.

[0019] When the pollutants in the air exceed the preset value, the air is passed into the removal unit.

[0020] When the pollutants in the air do not exceed the preset value, the air is passed into the mixing unit;

[0021] Using a removal unit to remove pollutants from the air;

[0022] Passing the air decontaminated with pollutants into a mixing unit;

[0023] Fresh air is introduced into the mixing unit;

[0024] The mixed air in the mixing unit is introduced into the air duct inlet.

[0025] In some embodiments, before detecting the concentration of pollutants in the air, the air is passed through a filtration unit to remove nitrogen oxides from the air.

[0026] In some embodiments, when the pollutants in the air exceed a preset value, the step of passing the air into the removal unit further includes the following steps:

[0027] Multiple second detection elements are used to detect the pollutant concentration in the air before it enters multiple removal elements. If the pollutant concentration detected by the multiple second detection elements exceeds the preset value, the air is passed into the return air duct. If the pollutant concentration detected by at least one of the multiple second detection elements does not exceed the preset value, the air is passed into the mixing unit.

[0028] In some embodiments, the plurality of second detection elements are respectively used to detect the concentrations of different types of pollutants in the air.

[0029] In some embodiments, a flow meter is used to detect the air flow rate discharged from the pre-treatment unit and the air flow rate introduced into the mixing unit, so that the air flow rate discharged from the pre-treatment unit is equal to the air flow rate introduced into the mixing unit. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 Schematic diagram of an intelligent ventilation system for coal mines according to an embodiment of the present invention.

[0031] Figure 2 It is a schematic diagram of a removal unit of an intelligent ventilation system for coal mines according to an embodiment of the present invention.

[0032] Figure 3 It is a flow chart of the intelligent ventilation method for coal mines according to an embodiment of the present invention.

[0033] Reference numerals:

[0034] 1. Pre-processing unit,

[0035] 2. Filtration unit,

[0036] 3. Detection unit, 31. First detection member,

[0037] 4. Removal unit, 41. Removal member, 42. Second detection member, 43. Third detection member,

[0038] 5. Mixing unit, 51. Air inlet, 52. Air outlet. DETAILED DESCRIPTION

[0039] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0040] The following describes the intelligent ventilation system for coal mines according to an embodiment of the present invention with reference to the accompanying drawings.

[0041] like Figure 1 and Figure 2 As shown, the intelligent ventilation system for coal mines according to the embodiment of the present invention includes: a pretreatment unit 1 , a detection unit 3 , a removal unit 4 and a mixing unit 5 .

[0042] The pretreatment unit 1 is connected to the outlet of the air duct to remove dust from the air discharged from the outlet of the air duct. The detection unit 3 is connected to the pretreatment unit 1 to receive the air discharged from the pretreatment unit 1. The detection unit 3 includes a first detection member 31, which is used to detect the concentration of pollutants in the air discharged from the pretreatment unit 1. The removal unit 4 is connected to the detection unit 3, and the removal unit 4 is used to remove pollutants in the air passed into the removal unit 4. The detection unit 3 and the removal unit 4 are both connected to the mixing unit 5, and the mixing unit 5 has an air inlet 51 and an air outlet 52. The air inlet 51 is connected to the tunnel ventilation duct so that fresh air is passed into the mixing unit 5. In the mixing unit 5, the fresh air is mixed with the air discharged from the detection unit 3 and / or the removal unit 4 and then discharged into the tunnel through the air outlet 52.

[0043] Specifically, Figure 1As shown, the outlet of the duct can discharge gases carrying various pollutants such as methane, carbon monoxide, nitrogen oxides, carbon dioxide, etc. generated by the working surface, and the types and concentrations of pollutants carried in the air will have certain differences depending on the working surface. Therefore, the first detection component 31 provided in the detection unit 3 may include a variety of different types of detectors to detect various pollutants contained in the air. Different pollutant removal equipment is provided in the removal unit 4, such as adsorption beds, catalysts, washing liquids, and variable temperature pressure equipment. The pretreatment unit 1 can use wet dust removal, filtering dust removal and other dust removal equipment to remove dust from the air to avoid subsequent dust affecting the measurement of pollutant concentrations, and at the same time prevent dust from adhering to the detector to ensure the detection sensitivity of the detector.

[0044] It is understandable that if Figure 1 As shown, the dirty air discharged from the outlet of the wind tube is first subjected to dust removal by the processing unit, and then the dust-removed air is passed into the detection unit 3, and the pollutant concentration in the air in the detection unit 3 is detected by the first detection member 31. When the detected pollutant concentration exceeds the preset concentration value, the air in the detection unit 3 is passed into the removal unit 4, and vice versa, the air in the detection unit 3 is passed into the mixing unit 5. The air passed into the removal unit 4 passes through the pollutant removal device, and then passes into the mixing unit 5 to be mixed with the fresh air introduced by the air inlet 51. The mixed air is discharged into the downstream wind tube or the working surface to realize the reuse of air, reduce the demand for fresh air in the tunnel ventilation duct, reduce the overall delivery volume of the tunnel ventilation duct, and avoid excessive load on the tunnel ventilation equipment.

[0045] In addition, it should be noted that, in the detection unit 3, if the air pollutant concentration value detected by the first detection component 31 exceeds the preset concentration value and the difference is too large, the gas in the detection unit 3 can be directly introduced into the return air duct, and the wind source of the wind duct connected to the mixing unit 5 can be directly provided by the air introduced by the air inlet 51, so as to avoid the problem of poor air circulation caused by excessive pollutants from the upstream working surface at the working face with low wind demand.

[0046] That is to say, the intelligent ventilation system for coal mines according to the embodiment of the present invention can detect the dirty air discharged from the wind duct and remove pollutants in the air according to the detection results. The air after removing the pollutants can be used again in some working faces of the mine; or the air with excessively high pollutant content can be directly discharged into the return air lane to ensure the ventilation efficiency of the mine tunnels and working faces.

[0047] In addition, mixing the air without pollutants with fresh air in the mixing unit 5 can not only reduce the pollutant content in the mixed air, but also reduce the demand for fresh air. It not only reduces the operating power of the ventilation equipment, but also supplies fresh air to the working face with high wind demand, which is more conducive to mine production safety and thus increases the possibility of safe and healthy work for underground personnel.

[0048] In some embodiments, the intelligent ventilation system for coal mines of the embodiments of the present invention further includes a filter unit 2 , which is connected between the pretreatment unit 1 and the detection unit 3 , and is used to remove nitrogen oxides from the air discharged from the pretreatment unit 1 .

[0049] Specifically, Figure 1 As shown, the filter unit 2 is connected between the pretreatment unit 1 and the detection unit 3 through a pipeline. A reducing agent such as ammonia or hydrocarbons can be set in the filter unit 2 to react with nitrogen oxides in the air entering the filter unit 2, thereby removing the nitrogen oxides carried in the air.

[0050] It is understandable that fuel equipment working in a mine, such as engineering vehicles, tunneling machines, transport vehicles and other equipment that uses fuel as a power source, is prone to produce nitrogen oxides during operation. Therefore, the wind duct collects the gas generated by the working surface, so that the nitrogen oxides will be mixed in the gas. In order to ensure the subsequent detection and removal of pollutants, the filter unit 2 can first be used to remove the nitrogen oxides carried in the air.

[0051] Optionally, there are multiple removal units 4, and the removal unit 4 includes a removal element 41 and a second detection element 42. The second detection element 42 is arranged upstream of the removal unit 4, and the second detection element 42 is used to detect the pollutant concentration in the air before it enters the removal element 41. If the pollutant concentrations detected by multiple second detection elements 42 exceed a preset value, the removal unit 4 will pass the air into the return air duct.

[0052] Specifically, Figure 1 and Figure 2As shown, multiple removal units 4 are connected in parallel with the detection unit 3, and each removal unit 4 is connected to the detection unit 3 through a pipeline. In other words, multiple removal units 4 can perform removal and purification operations at the same time, that is, the pollutant concentration in the air detected by the first detection member 31 in the detection unit 3 exceeds the preset concentration, and the air in the detection unit 3 can be respectively passed into multiple removal units 4 to perform the removal operation. In addition, while the removal unit 4 is performing the removal operation, the detection unit 3 continuously detects the air discharged from the filter unit 2, so that after the pollutant concentration in the air drops to a safe range, the air can be stopped from being passed into the removal unit 4. It should be noted that when the detection unit 3 performs continuous detection and the pollutant concentration in the air exceeds the preset concentration, the air in the filter unit 2 can be directly passed into the removal unit 4 until the pollutant concentration drops to a safe range, and then the pipeline between the filter unit 2 and the removal unit 4 is closed.

[0053] In other embodiments, there are multiple second detection members 42, and the multiple second detection members 42 correspond one-to-one to the multiple removal units 4, and the multiple second detection members 42 are divided into multiple gas concentration detectors, such as a methane concentration detector, a carbon monoxide concentration detector, etc. In other words, the detection unit 3 can detect the concentration of multiple pollutants in the air, and the second detection member 42 can detect the concentration of one pollutant in the air. In this way, the detection accuracy of the pollutant concentration can be improved.

[0054] It should be noted that after the air in the detection unit 3 is passed into multiple removal units 4, the pollutant concentration is first detected using the second detection element 42. If the pollutant concentrations detected by the multiple second detection elements 42 exceed the preset concentrations, the air in the detection unit 3 and the multiple removal units 4 is directly discharged into the return air duct; if at least one of the pollutant concentrations detected by the multiple second detection elements 42 does not exceed the preset concentration, the subsequent air is correspondingly passed into the removal unit 4 that can remove the corresponding pollutants for removal operations. In this way, the consumption of reaction reagents in the removal unit 4 can be reduced, and the fewer pollutants in the air that need to be removed, the more convenient it is to ensure that the pollutant concentrations in the air are within a safe concentration range when mixing with fresh air later.

[0055] In some embodiments, the removal unit 4 further includes a third detection element 43 , which is disposed downstream of the removal element 41 , and is used to detect the concentration of pollutants in the air discharged from the removal element 41 after the pollutants are removed.

[0056] Specifically, Figure 2As shown, taking methane removal as an example, the removal unit 4 includes a first detection chamber, a removal element 41, and a second detection chamber connected in sequence, the second detection element 42 is arranged in the first detection chamber, and the third detection element 43 is arranged in the second detection chamber. The removal element 41 is provided with a solution for absorbing methane, such as acetone. That is to say, in the first detection chamber, if the second detection element 42 detects that the concentration of pollutants in the air exceeds a preset value, it can be passed through a pipeline into the removal element 41 for removal operation to remove methane from the air, and the air after methane removal is passed into the second detection chamber, and then the third detection element 43 is used to detect the concentration of pollutants to determine the removal effect.

[0057] Optionally, the third detection element 43 may be a detector for measuring a variety of different types of pollutants, so as to perform a comprehensive detection on the air after the pollutants are removed to ensure the air quality.

[0058] In some embodiments, the sum of the air flow rates introduced from the detection unit 3 , the removal unit 4 and the air inlet 51 to the mixing unit 5 is equal to the air flow rate exhausted from the pretreatment unit 1 .

[0059] It can be understood that gas flow detectors are provided at the air outlet pipe 52 of the filtering unit 2, the pipe connecting the detection unit 3 and the mixing unit 5, the pipe connecting the removal unit 4 and the mixing unit 5, and the air inlet 51 on the mixing unit 5 for detecting the gas flow.

[0060] That is to say, the gas flow rate of the air outlet 52 pipe of the filter unit 2 is the total gas flow rate, and according to the detection results, the detection unit 3 or the removal unit 4 can discharge part of the air with high pollutant concentration directly into the return air duct, so that the total gas flow rate entering the mixing unit 5 is reduced. Therefore, fresh air is introduced into the air inlet 51 of the mixing unit 5 to ensure that the sum of the fresh air flow rate entering the mixing unit 5 and the treated air flow rate is equal to the total gas flow rate, so as to ensure the stability of the air volume between each air duct or working surface.

[0061] The following describes the intelligent ventilation method for coal mines according to an embodiment of the present invention with reference to the accompanying drawings.

[0062] like Figure 3 As shown, the intelligent ventilation method for coal mines in an embodiment of the present invention is implemented according to the intelligent ventilation system for coal mines in any one of the above embodiments, and is characterized in that it includes the following steps:

[0063] The turbid air discharged from the air duct outlet is pre-treated. The pre-treatment includes dust removal of the air, that is, removing dust and other particles in the air.

[0064] Detect whether the concentration of pollutants in the air exceeds the preset value. If the concentration of pollutants in the air exceeds the preset value, the air is passed into the removal unit; if the concentration of pollutants in the air does not exceed the preset value, the air is passed into the mixing unit. In other words, the concentration of pollutants in the air can be initially detected by the detection unit, and the next operation of the air can be determined based on the detection results. That is, if the concentration of pollutants in the air exceeds the preset concentration, the air needs to be removed in the next step. If it does not exceed the preset concentration, the air can be passed into the mixing unit.

[0065] The pollutants in the air are removed by using a removal unit, which can be different pollutant removal equipment, such as adsorption beds, catalysts, scrubbing liquids, and variable temperature and pressure equipment.

[0066] The air from which pollutants have been removed is passed into the mixing unit. It is understood that, in order to ensure the removal effect and keep the pollutant concentration in the air as close to the safe concentration range as possible, mixing can be performed in the mixing unit to reduce the pollutant concentration again.

[0067] Fresh air is introduced into the mixing unit. Fresh air can be provided by the alley ventilation duct.

[0068] The mixed air in the mixing unit is introduced into the air duct inlet, which realizes the reuse of air, reduces the demand for air volume in the tunnel ventilation duct, and reduces the load of the tunnel ventilation system.

[0069] In some embodiments, before detecting the concentration of pollutants in the air, the air is passed through a filter unit to remove nitrogen oxides in the air. A reducing agent (such as ammonia or hydrocarbons, etc.) may be provided in the filter unit to react with nitrogen oxides in the air passed through the filter unit, thereby removing nitrogen oxides carried in the air.

[0070] In some embodiments, when the pollutants in the air exceed a preset value, the step of passing the air into the removal unit further includes the following steps:

[0071] Multiple second detection elements are used to detect the pollutant concentration in the air before it enters multiple removal elements. If the pollutant concentration detected by the multiple second detection elements exceeds the preset value, the air is passed into the return air duct. If the pollutant concentration detected by at least one of the multiple second detection elements does not exceed the preset value, the air is passed into the mixing unit.

[0072] It is understandable that multiple second detection elements can detect the concentration of pollutants in the air multiple times to ensure the detection results. When all the second detection elements detect that a certain pollutant in the air exceeds the preset concentration, the air can be directly introduced into the return air channel to avoid consuming too much reaction reagents required to remove the pollutants; when the detection information detected by multiple second detection elements is greatly different, the concentration of pollutants in the air is close to the preset concentration, and fresh air can be used to dilute it to avoid excessive concentration of pollutants in the air, and the air mixed with fresh air can be used for work surfaces without staff or with fewer staff.

[0073] In some embodiments, the plurality of second detection elements are respectively used to detect the concentrations of different types of pollutants in the air.

[0074] It is understandable that the second detection element is divided into multiple different types of detectors so that the concentration of multiple pollutants in the air can be detected. Then, the detection using the second detection element is divided into two situations. In the first situation, when multiple second detection elements detect that the pollutants in the air exceed the preset concentration, the air is directly passed into the return air channel; in the second situation, one or more of the multiple second detection elements detect that the concentration of air pollutants does not exceed the preset concentration, and the air carrying excessive pollutants can be passed into the corresponding removal element for pollutant removal. In this way, the removal efficiency of the removal unit can be improved, and excessive consumption of reaction reagents in the removal unit can be avoided.

[0075] In some embodiments, a flow meter is used to detect the air flow rate discharged from the pre-treatment unit and the air flow rate introduced into the mixing unit, so that the air flow rate discharged from the pre-treatment unit is equal to the air flow rate introduced into the mixing unit.

[0076] That is to say, the gas flow rate of the air outlet pipe of the filter unit is the total gas flow rate, and according to the detection results, the detection unit or the removal unit can discharge part of the air with high pollutant concentration directly into the return air duct, so that the total gas flow rate entering the mixing unit is reduced. Therefore, fresh air is introduced into the air inlet of the mixing unit to ensure that the sum of the fresh air flow rate entering the mixing unit and the treated air flow rate is equal to the total gas flow rate, so as to ensure the stability of the air volume between each air duct or working surface.

[0077] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0078] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0079] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0080] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0081] In the present invention, the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0082] Although the above embodiments have been shown and described, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations on the present invention. Changes, modifications, substitutions and variations of the above embodiments by those of ordinary skill in the art are all within the scope of protection of the present invention.

Claims

1. An intelligent ventilation system for coal mines, characterized in that: include: A pre-treatment unit, the pre-treatment unit is connected to the outlet of the air duct to remove dust from the air discharged from the outlet of the air duct; A detection unit, the detection unit is connected to the pre-processing unit and is used to receive the air exhausted by the pre-processing unit, the detection unit includes a first detection element, and the first detection element is used to detect the concentration of pollutants in the air exhausted by the pre-processing unit; A removal unit, the removal unit is connected to the detection unit, and the removal unit is used to remove pollutants in the air passing into the removal unit; A mixing unit, wherein the detection unit and the removal unit are both connected to the mixing unit, and the mixing unit has an air inlet and an air outlet. The air inlet is connected to the tunnel ventilation duct so as to introduce fresh air into the mixing unit. In the mixing unit, the fresh air is mixed with the air exhausted by the detection unit and / or the removal unit and then discharged into the tunnel through the air outlet.

2. The intelligent ventilation system for coal mines according to claim 1, characterized in that: It also includes a filtering unit, which is connected between the pre-treatment unit and the detection unit, and is used to remove nitrogen oxides in the air discharged from the pre-treatment unit.

3. The intelligent ventilation system for coal mines according to claim 1, characterized in that: There are multiple removal units, each of which includes a removal piece and a second detection piece. The second detection piece is arranged upstream of the removal unit. The second detection piece is used to detect the pollutant concentration in the air before it enters the removal piece. If the pollutant concentrations detected by multiple second detection pieces exceed the preset value, the removal unit will pass the air into the return air duct.

4. The intelligent ventilation system for coal mines according to claim 3 is characterized in that: The removal unit further comprises a third detection member, which is arranged downstream of the removal member and is used to detect the concentration of pollutants in the air discharged from the removal member after the pollutants are removed.

5. The intelligent ventilation system for coal mines according to claim 4, characterized in that: The sum of the air flow rates introduced from the detection unit, the removal unit and the air inlet to the mixing unit is equal to the air flow rate discharged from the pre-treatment unit.

6. A coal mine intelligent ventilation method, the coal mine intelligent ventilation method is implemented according to the coal mine intelligent ventilation system according to any one of claims 1 to 5, characterized in that: The following steps are involved: Pre-treat the turbid air discharged from the air duct outlet; Detect whether the concentration of pollutants in the air exceeds the preset value. When the pollutants in the air exceed the preset value, the air is passed into the removal unit. When the pollutants in the air do not exceed the preset value, the air is passed into the mixing unit; Using a removal unit to remove pollutants from the air; Passing the air decontaminated with pollutants into a mixing unit; Fresh air is introduced into the mixing unit; The mixed air in the mixing unit is introduced into the air duct inlet.

7. The intelligent ventilation method for coal mines according to claim 6, characterized in that: Before testing the concentration of pollutants in the air, the air is passed through a filter unit to remove nitrogen oxides from the air.

8. The intelligent ventilation method for coal mines according to claim 7, characterized in that: In the step of passing the air into the removal unit when the pollutants in the air exceed the preset value, the following steps are also included: The plurality of second detection elements are used to detect the concentration of pollutants in the air before it passes through the plurality of removal elements. If the pollutant concentration detected by the multiple second detection elements exceeds the preset value, the air is introduced into the return air channel. If the pollutant concentration detected by at least one of the plurality of second detection elements does not exceed a preset value, the air is passed into the mixing unit.

9. The intelligent ventilation method for coal mines according to claim 8, characterized in that: The plurality of second detection elements are respectively used to detect the concentrations of different types of pollutants in the air.

10. The intelligent ventilation method for coal mines according to claim 9, characterized in that: The flow rate of air discharged from the pretreatment unit and the flow rate of air introduced into the mixing unit are detected by using a flow meter, so that the flow rate of air discharged from the pretreatment unit is equal to the flow rate of air introduced into the mixing unit.

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