A coal mine underground return air corner carbon monoxide accommodation curtain plate and an accommodation method

Abstract

The application discloses a coal mine underground return air corner carbon monoxide accommodation curtain plate and an accommodation method. The accommodation curtain plate comprises a CO accommodation module, the CO accommodation module comprises at least one CO accommodation unit group, the CO accommodation unit group comprises CO accommodation material, the accommodation curtain plate further comprises a framework structure, a baffle and a soft seal, the framework structure comprises at least two adjacent support plate groups, adjacent support plate groups are rotationally connected through a rotating shaft, and the CO accommodation unit group is installed in the support plate group; the framework structure further comprises an extension plate, and the other side of the extension plate is fixed with the soft seal. The traditional physical dilution method cannot eliminate the root cause, and the catalytic oxidation filtration exists a safety risk. The application utilizes a natural pressure difference to realize unpowered continuous CO accommodation, and through a telescopic adjusting structure, the application is suitable for dynamic changes of a return air corner space, and realizes safe, stable and efficient CO accommodation.

Description

Technical Field

[0001] This invention belongs to the field of mine ventilation and harmful gas control technology, specifically relating to a carbon monoxide disposal curtain and disposal method in the corner of the return air in underground coal mines. Background Technology

[0002] During the production process of fully mechanized coal mining faces in underground mines, the continuous low-temperature oxidation of residual coal in the goaf generates a large amount of CO. Under the influence of factors such as air leakage in the goaf and negative pressure ventilation, CO migrates with the leaking airflow towards the return air corner of the working face. The return air corner has a narrow space and complex airflow organization, which easily forms a vortex zone, making it difficult for conventional ventilation airflow to fully replace the air in this area. Therefore, CO easily accumulates locally in the return air corner and causes the concentration to exceed the limit, which not only deteriorates the underground working environment and affects normal mine production, but may also lead to frequent false alarms from CO sensors, reduce the sensitivity and vigilance of management personnel to alarm information, and even threaten the health of workers and mine safety.

[0003] Currently, CO control in the return air corner mainly employs two methods: physical dilution and catalytic oxidation filtration. Physical dilution primarily uses air curtains to regulate local airflow, but it struggles to adapt to the dynamic changes in the distance between hydraulic supports and the coal face during face advancement. In some cases, additional support is required on the return air side of the goaf, and it only reduces CO concentration, not achieving substantial CO elimination. Catalytic oxidation filtration typically uses fans to guide CO-containing gas into the catalytic oxidation device for treatment. However, according to the relevant requirements of the "Coal Mine Safety Regulations," coal mining faces must adopt full-pressure ventilation throughout the mine, and the use of local ventilation fans to dilute methane in the return air corner is strictly prohibited. Furthermore, powered ventilation easily disturbs the original flow field in the return air corner and goaf, potentially affecting the monitoring and determination of spontaneous combustion in the goaf, and the reliability requirements for long-term underground operation of power equipment are high. Therefore, existing CO treatment methods still have certain limitations in terms of safety, reliability and on-site adaptability. There is an urgent need to develop a CO absorption device that does not require additional power for ventilation, has minimal disturbance to the original flow field, and can adapt to dynamic changes in the return air corner space, so as to achieve safe, stable and continuous CO absorption. Summary of the Invention

[0004] This invention aims to provide a carbon monoxide (CO) disposal curtain plate and disposal method in the return air corner of a coal mine, thereby reducing the CO concentration in the return air corner, reducing false CO alarms, and improving the safety level of mine production.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows: A carbon monoxide (CO) condensate curtain plate for return air corner in a coal mine includes a CO condensate module, wherein the CO condensate module includes at least one CO condensate unit group, wherein the CO condensate unit group includes CO condensate material, and further includes a skeleton structure, a baffle and a soft seal. The skeleton structure includes at least two adjacent support plate groups, which are rotatably connected by a rotating shaft, and the CO digestion unit group is installed in the support plate group; The skeleton structure also includes an extension plate, one side of the support plate assembly is perpendicularly fixed to one side of the extension plate, and the other side of the extension plate is fixed with a soft seal. A baffle is provided on the other side of the support plate assembly, and the baffle is rotatably connected to the adjacent support plate assembly via a rotating shaft.

[0006] This invention effectively fills the gap between the device and the coal wall by setting a soft seal, reducing airflow bypass and enhancing the sealing stability of the device's edge area. CO gas is absorbed by CO absorption material, creating a natural pressure difference on both sides of the CO absorption unit group. This natural pressure difference further drives the CO-containing gas through the low-resistance CO absorption module, achieving continuous CO absorption without external power ventilation, reducing disturbance to the original flow field in the return air corner and goaf, and improving the safety of the treatment process. The above structures work together to achieve continuous and efficient CO absorption without power, improving the device's adaptability to complex underground environments and operational reliability.

[0007] According to embodiments of the present invention, the present invention can be further optimized, and the optimized technical solution is as follows: The soft seal and the extension plate are installed in the same straight line, and the angle between the extension plate and the support plate assembly is 60° to 120°. This angle range reduces airflow around the seal and enhances the sealing stability of the device's edge areas.

[0008] In one preferred embodiment, the CO digestion material is housed inside the CO digestion unit group, and flame-retardant filter cotton, metal filter screen and perforated plate are arranged sequentially from the inside to the outside on both sides of the CO digestion material.

[0009] The perforated plate is used to fix the internal materials and ensure airflow. The metal filter screen serves as support and secondary filtration. The flame-retardant filter cotton effectively blocks dust from entering the digestion unit, preventing the poisoning and deactivation of the precious metal active components. This structural design not only improves the catalytic oxidation efficiency of CO but also enhances the durability and safety of the curtain plate in the harsh underground environment, extending its service life.

[0010] In one preferred embodiment, the CO digester is a particulate CO digester with a particle size of 1-4 mm and a filling thickness of 3-10 mm. CO digesters within this parameter range can balance CO digestion efficiency and gas flow performance.

[0011] The CO scavenging material includes an activated carbon carrier and a noble metal active component supported on the activated carbon carrier, wherein the noble metal active component is one or both of Pt and Pd.

[0012] In one preferred embodiment, each of the support plate groups includes a transmission plate and a digestion plate arranged from top to bottom. A flexible curtain is fixed to the inner side of the transmission plate, and the CO digestion unit group is installed in the digestion plate.

[0013] In one preferred embodiment, a metal baffle or curtain is provided inside the absorption plate adjacent to the baffle.

[0014] In one preferred embodiment, a flexible curtain is fixed to the lower side of the absorption plate.

[0015] In one preferred embodiment, a hydraulic cylinder is installed between adjacent transmission plates, and a flexible curtain is installed on the inner side of the transmission plate. The frame structure, combined with the curtain enclosure, reduces the driving load while minimizing air leakage, thus improving the overall windproof reliability of the device.

[0016] In one preferred embodiment, the baffle includes an upper baffle and a lower baffle. A hydraulic cylinder is mounted on the lower baffle, and the other end of the hydraulic cylinder is fixed to the upper baffle. A flexible curtain is fixed to the inner side of the upper baffle. By combining the telescopic drive cylinder with the rotating connection structure, the support plate assembly and the baffle can be adjusted according to changes in the return air corner space and the position of the hydraulic support, thereby improving the on-site adaptability of the device.

[0017] The present invention also discloses a method for the carbon monoxide disposal curtain plate in the return air corner of a coal mine, comprising the following steps: setting the skeleton structure in the return air corner of the coal mining face, so that the soft seal fits against the corresponding roadway wall or installation boundary; adjusting the baffle according to the spatial dimensions of the return air corner of the coal mining face, and adjusting the disposal curtain plate to be in the unfolded state.

[0018] Compared with existing technologies, the advantages of this invention are: traditional physical dilution methods cannot address the root cause of CO, and catalytic oxidation filtration poses safety risks. This invention utilizes natural pressure difference to achieve continuous CO absorption without power, and adapts to dynamic changes in the return air corner space through a scalable and adjustable structure, thus achieving safe, stable, and efficient CO absorption. Attached Figure Description

[0019] Figure 1 This is a front structural diagram of the present invention; Figure 2 This is a side view of the present invention; Figure 3 This is a schematic diagram of the transmission plate assembly structure of the present invention; Figure 4This is a schematic diagram of the absorption plate assembly structure of the present invention; Figure 5 This is a schematic diagram of the CO digestion unit structure of the present invention; Figure 6 This is a schematic diagram of the CO digester box structure of the present invention; Figure 7 This is a schematic diagram showing the installation position of the absorption curtain plate of the present invention in the return air corner of the coal mining face; Figure 8 This is a schematic diagram showing the connection between the cooling curtain and the hydraulic support in the present invention.

[0020] In the diagram: 1. CO digestion unit group, 11. CO digestion unit I, 12. CO digestion unit II, 13. CO digestion unit III, 14. CO digestion unit IV, 2. Frame structure, 21. Support plate group, 23. Support plate I, 24. Support plate ⅠⅠ, 25. Support plate ⅠⅠⅠ, 3. Baffle, 31. Upper baffle, 32. Lower baffle, 4. Hydraulic mechanism, 44. Hydraulic cylinder IV, 45. Hydraulic cylinder V, 46. Hydraulic cylinder ⅤⅠ, 61. Rotating shaft I, 62. Rotating shaft ⅠⅠ, 63. Rotating shaft ⅠⅠⅠ, 78. Flexible curtain ⅤⅡⅠ; 22. Extension plate, 221. Extension plate I, 222. Extension plate ⅠⅠ, 5. Soft seal, 51. Soft seal I, 52. Soft seal ⅠⅠ; 231. Transmission plate I; 241. Transmission plate ⅠⅠ; 251. Transmission plate ⅠⅠⅠ; 26. Aluminum profile I; 27. Aluminum profile ⅠⅠ; 28. Aluminum profile ⅠⅠⅠ; 41. Hydraulic cylinder I; 42. Hydraulic cylinder ⅠⅠ; 43. Hydraulic cylinder ⅠⅠⅠ; 71. Flexible curtain I; 72. Flexible curtain II; 73. Flexible curtain ⅠⅠⅠ; 74. Flexible curtain IV; 75. Flexible curtain V; 76. Flexible curtain VI; 232. Absorption plate I; 242. Absorption plate ⅠⅠ; 252. Absorption plate ⅠⅢⅠ; 29. ​​Baffle; 77. Flexible curtain VII; 15. Horizontal brace; 16. CO decomposition box; 161. Perforated plate; 162. Metal filter screen; 163. Flame-retardant filter cotton; 164. Granular CO disposal material. Detailed Implementation

[0021] The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0022] In this invention, unless otherwise stated, directional terms such as "upper" and "lower" generally refer to the orientation of the relevant component in its actual use. "Inner" and "outer" refer to the inner and outer contours of the corresponding component. Furthermore, when the following description relates to the accompanying drawings, unless otherwise indicated, the same numbers in different drawings denote the same or similar elements. The terms "first," "second," etc., used in this invention are for distinguishing one element from another and do not indicate sequence or importance.

[0023] Example

[0024] like Figure 1 As shown, this invention provides a carbon monoxide (CO) absorption curtain for the return air corner in coal mines, aiming to reduce CO concentration in the return air corner, decrease false CO alarms, and improve mine safety. This absorption curtain includes a CO absorption module, a frame structure 2, a baffle 3, a hydraulic mechanism 4, and a soft seal 5. The CO absorption module includes a CO absorption unit group 1, which includes CO absorption unit I 11, CO absorption unit II 12, CO absorption unit III 13, and CO absorption unit IV 14. Each CO absorption unit is installed at a corresponding position on the frame structure 2 to increase the contact area between CO-containing gas and the particulate CO absorption material 164, thereby improving the CO absorption effect. The frame structure 2 includes a support plate group 21, which includes support plate I 23, support plate II 24, and support plate III 25 arranged sequentially. Support plate I 23 is rotatably connected to support plate II 24 via pivot I 61. Support plate II 24 is rotatably connected to support plate III 25 via pivot II 62. Support plate III 25 is rotatably connected to baffle 3 via pivot III 63, allowing support plate I 23, support plate II 24, support plate III 25, and baffle 3 to rotate relative to each other, thereby enabling the unfolding and retraction of this absorption curtain. Baffle 3 includes an upper baffle 31 and a lower baffle 32. A flexible curtain VIII 78 is fixedly installed on one side of the upper baffle 31 to seal the gap between the upper baffle 31 and the roadway installation boundary or adjacent components. Hydraulic cylinders IV44 and V45 are positioned between the upper baffle 31 and the lower baffle 32 to drive the upper baffle 31 and the lower baffle 32 to move relative to each other, thereby adjusting the overall size of the baffle 3. One end of hydraulic cylinder VI46 is connected to the lower baffle 32, and the other end is connected to the hydraulic support at the end of the coal mining face. The relative position and installation angle between the baffle 3 and the hydraulic support are adjusted by the extension and retraction of hydraulic cylinder VI46, so that the baffle 3 can adapt to different installation spaces at the return air corner angle.

[0025] like Figure 2As shown, the skeleton structure 2 includes an extension plate 22, which includes extension plate I 221 and extension plate II 222. Extension plate I 221 is fixedly connected to transmission plate I 231, and extension plate II 222 is fixedly connected to absorption plate I 232. Extension plates I 221 and II 222 are used together to expand the installation and sealing area at the edge of the absorption curtain. The soft seal 5 includes soft seal I 51 and soft seal II 52. Soft seal I 51 is fixedly set on one side of extension plate I 221, and soft seal II 52 is fixedly set on one side of extension plate II 222. After the absorption curtain is installed at the return air corner of the mine, soft seal I 51 and soft seal II 52 respectively fit against the corresponding roadway wall or installation boundary to compensate for the unevenness of the roadway wall and the installation size deviation of the absorption curtain, reduce the gap between the absorption curtain and the roadway wall, and reduce the possibility of CO-containing gas flowing around the edge of the absorption curtain. Soft seal I51 and soft seal II52 are made of flexible materials with flame retardancy, flexibility and wear resistance, and can adapt to the local uneven structure of the tunnel wall through elastic deformation.

[0026] like Figure 3As shown, support plate I23 includes transmission plate I231 and absorption plate I232; support plate II24 includes transmission plate II241 and absorption plate II242; and support plate III25 includes transmission plate III251 and absorption plate III252. Transmission plate I231 is connected to absorption plate I232 via aluminum profile I26; transmission plate II241 is connected to absorption plate II242 via aluminum profile II27; and transmission plate III251 is connected to absorption plate III252 via aluminum profile III28. Aluminum profiles I26, II27, and III28 are used to connect the corresponding transmission plates and absorption plates and improve the structural stability of each support plate. Hydraulic cylinder I41 is located between transmission plate I231 and transmission plate II241; hydraulic cylinder II42 is located between transmission plate II241 and transmission plate III251; and hydraulic cylinder III43 is located between transmission plate III251 and upper baffle 31. Transmission plates I 231, II 241, and III 251 are used to bear and transmit the driving force generated by the corresponding hydraulic cylinders. By controlling the extension and retraction of hydraulic cylinders I 41, II 42, and III 43, the relative positions between adjacent transmission plates and between transmission plate III 251 and the upper baffle 31 can be adjusted respectively, thereby driving the frame structure 2 to unfold or retract step by step. Flexible curtains I 71, II 72, and III 73 are fixedly installed on one side of transmission plates I 231, II 241, and III 251 respectively, to close the gaps formed by the rotational connection between adjacent support plates. Flexible curtains IV 74, V 75, and VI 76 are fixedly installed on one side of aluminum profiles I 26, II 27, and III 28 respectively, to close the gaps between the corresponding transmission plates and the absorption plate. Each flexible curtain can bend or fold as the frame structure 2 unfolds or retracts, maintaining the continuity of the curtain shielding structure without affecting the relative rotation of each support plate.

[0027] like Figure 4As shown, the CO digestion plate assembly includes digestion plate I 232, digestion plate II 242, and digestion plate III 252. Digestion plate I 232 is detachably connected to CO digestion unit I 11 and CO digestion unit II 12 via flanges, and digestion plate II 242 is detachably connected to CO digestion unit III 13 and CO digestion unit IV 14 via flanges. Digestion plates I 232 and II 242 are used to install and support the corresponding CO digestion units and to transfer the forces acting on the CO digestion units to the frame structure 2. The flange connection facilitates the installation, disassembly, and replacement of the CO digestion units. Digestion plate III 252 is fixedly connected to baffle 29, which is used to enclose areas where no CO digestion units are installed and to improve the overall structural stability of support plate III 25. A flexible curtain VII77 is fixedly installed on the lower side of the absorption plate I 232, absorption plate II 242 and absorption plate III 252. The flexible curtain VII77 extends along the lower side of the absorption plate group to close the gap between the lower side of the absorption plate group and the roadway floor or adjacent components, reduce the flow of CO-containing gas around the CO absorption unit, and allow more CO-containing gas to flow through the CO absorption unit and come into contact with the particulate CO absorption material.

[0028] like Figure 5 As shown, each CO digestion unit includes cross braces 15 and twelve CO digestion boxes 16. The cross braces 15 are arranged in a crisscross pattern to form twelve installation areas, and the twelve CO digestion boxes 16 are arranged in four rows and three columns within their respective installation areas. The cross braces 15 form the main frame of the CO digestion unit and support and limit the movement of each CO digestion box 16. Each CO digestion box 16 is detachably mounted to the cross brace 15 via flanges and fasteners, allowing for independent disassembly, installation, and replacement. When the particulate CO digestion material 164 in any CO digestion box 16 reaches its service life or its digestion capacity decreases, the corresponding CO digestion box 16 can be disassembled individually without dismantling the entire CO digestion unit. The even arrangement of multiple CO digestion boxes 16 increases the contact area between the particulate CO digestion material 164 and the CO-containing gas, and allows the CO-containing gas to flow more evenly through the CO digestion unit, reducing local ventilation resistance.

[0029] like Figure 6As shown, the CO digester box 16 includes a perforated plate 161, a metal filter 162, flame-retardant filter cotton 163, and granular CO digester material 164. The perforated plate 161 is located on the outside of the CO digester box 16 to protect the internal structure and forms a gas flow channel through its perforations. The metal filter 162 is located on one side of the perforated plate 161 to filter larger particles carried in the gas and prevent the granular CO digester material 164 from escaping. The flame-retardant filter cotton 163 is located on the side of the metal filter 162 away from the perforated plate 161 to filter fine dust, buffer vibrations and impacts on the granular CO digester material 164, and limit the movement of the granular CO digester material 164. The granular CO digester material 164 is contained within the CO digester box 16 for digesting the CO entering the CO digester box 16. The perforated plate 161, metal filter 162, and flame-retardant filter cotton 163 all adopt a breathable structure to form a gas flow path with low resistance. During use, the gas pressure difference formed on both sides of this absorption curtain drives CO-containing gas to pass sequentially through the perforated plate 161, metal filter 162, and flame-retardant filter cotton 163 into the CO absorption box 16, where it comes into full contact with the granular CO absorption material 164, thus absorbing the CO in the gas. The gas, after absorption treatment, is discharged through the breathable structure of the CO absorption box 16 under the action of the pressure difference, thereby achieving continuous absorption of CO-containing gas without the need for additional fans or other power devices, and reducing the CO concentration in the return air corner area.

[0030] like Figure 7 , 8 As shown, during the installation of this absorption curtain, the installation positions of the frame structure 2 and the baffle 3 are determined according to the spatial dimensions of the mine return air corner. The absorption curtain is connected to one side of the hydraulic support by hydraulic cylinder VI 46 and other reinforcement devices. The hydraulic mechanism drives hydraulic cylinders I 41, II 42, and III 43 to extend, causing support plates I 23, II 24, and III 25 to rotate around their corresponding axes until the frame structure 2 is unfolded to the predetermined position. Subsequently, hydraulic cylinders IV 44, V 45, and VI 46 are adjusted to adapt the baffle 3 to the installation space of the return air corner and to ensure that soft seals I 51 and II 52, as well as each flexible curtain, fit against the corresponding installation boundary.

[0031] When this gas absorption curtain is in operation, CO-containing gas in the return air corner flows through the CO absorption unit group 1 under the existing mine ventilation. After entering each CO absorption box 16, the CO-containing gas comes into contact with the granular CO absorption material 164, thus absorbing the CO and reducing the local CO concentration in the return air corner. The flexible curtain and soft seal are mainly used to reduce the flow of CO-containing gas around the internal and edge gaps of this absorption curtain, so as to improve the contact degree between the CO-containing gas and the granular CO absorption material 164.

[0032] When the working face advances or the installation space at the return air corner changes, the included angle between adjacent support plates and the relative positions of the upper baffle 31 and lower baffle 32 can be changed by adjusting the extension and retraction length of each hydraulic cylinder, so that this absorption curtain can adapt to return air corners of different sizes. When it is necessary to move this absorption curtain, control the retraction of each hydraulic cylinder to make support plate I 23, support plate II 24, support plate III 25 and baffle 3 retract in sequence, thereby reducing the space occupied by this absorption curtain.

[0033] When the granular CO dissipation material 164 reaches its service life or its CO dissipation capacity decreases, remove the fasteners between the corresponding CO dissipation box 16 and the cross brace 15, remove the CO dissipation box 16 from the CO dissipation unit, and replace the granular CO dissipation material 164 inside. After replacement, reinstall the CO dissipation box 16 in the corresponding position to restore the CO dissipation capacity of this dissipation curtain.

[0034] Comparative Example 1 To verify the effect of particle size range of particulate CO digestion materials on CO digestion performance, particulate CO digestion materials with particle sizes of 0.5 mm, 1 mm, 2 mm, 4 mm, 6 mm and 8 mm were prepared under the same active component loading and test conditions, and assembled into CO digestion units for performance testing. The test results are shown in the table below.

[0035] Table 1

[0036] As shown in Table 1, the gas permeability of the CO digester gradually increases with increasing particle size, but the specific surface area of ​​the active material and the number of CO contact sites decrease. When the particle size is too small, although it has a large specific surface area, it increases the airflow resistance, which is not conducive to the natural pressure difference driving gas flow at the return air corner. When the particle size is 1~4 mm, both CO digestion efficiency and gas flow performance can be balanced. Therefore, this application selects a particle size of 1~4 mm for the granular CO digester material.

[0037] Comparative Example 2 To verify the effect of the filling thickness of the particulate CO digestion material in the CO digestion unit on the digestion performance, CO digestion units with filling thicknesses of 1 mm, 3 mm, 5 mm, 10 mm, 15 mm and 20 mm of particulate CO digestion material were set up under the same particle size, active component loading and test conditions, and CO digestion performance was tested. The results are shown in the table below.

[0038] Table 2

[0039] As shown in Table 2, with the increase of the filling thickness of the granular CO digester, the contact time between CO and the active components is prolonged, and the digestion capacity gradually increases. However, when the filling thickness is too large, the gas passage path increases, leading to increased flow resistance, which is not conducive to the natural pressure difference at the return air corner driving CO-containing gas through the digestion module. When the filling thickness is too small, the contact between CO and the digester is insufficient, making it difficult to achieve efficient digestion. Therefore, a filling thickness of 3–10 mm for the granular CO digester can balance CO digestion efficiency and low-resistance airflow performance, and this application selects the aforementioned filling thickness range.

[0040] Comparative Example 3 To verify the effect of the angle between the soft seal and the support unit on CO absorption performance, under the condition that other structures of the absorption curtain remain the same, the angle between the soft seal and the support unit was set to 30°, 45°, 60°, 90°, 120° and 150° respectively, and the CO absorption rate was tested under different angle conditions. The results are shown in the table below.

[0041] Table 3

[0042] As shown in Table 3, the angle between the soft seal and the support unit affects the sealing condition of the edge area of ​​the device. When the angle is small, the soft seal's deployment range is insufficient, and gaps easily form between the device and the coal wall, allowing some CO-containing gas to bypass the digestion module, resulting in a decrease in CO digestion rate. As the angle increases, the soft seal's fit with the coal wall improves, the bypass airflow decreases, and the CO digestion rate gradually increases. When the angle is too large, the soft seal occupies more space, which may affect the deployment and retraction of the digestion curtain. Therefore, an angle of 60° to 120° between the soft seal and the support unit can balance the device's sealing performance and motion adaptability, achieving a higher CO digestion efficiency.

[0043] The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the specific details of the above embodiments. Within the scope of the technical concept of the present invention, various simple modifications can be made to the technical solution of the present invention, and these simple modifications all fall within the protection scope of the present invention.

[0044] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present invention will not describe the various possible combinations separately.

[0045] Furthermore, various different embodiments of the present invention can be combined in any way, as long as they do not violate the spirit of the present invention, they should also be regarded as the content disclosed by the present invention.

Claims

1. A carbon monoxide (CO) absorbing curtain plate for the return air corner in a coal mine, comprising a CO absorbing module, wherein the CO absorbing module comprises at least one CO absorbing unit group (1), and the CO absorbing unit group (1) comprises a CO absorbing material, characterized in that, It also includes a skeleton structure (2), a baffle (3) and a soft seal (5); The skeleton structure (2) includes at least two adjacent support plate groups (21), which are rotatably connected by a rotating shaft. The CO disposal unit group (1) is installed in the support plate group (21). The skeleton structure (2) also includes an extension plate (22), one side of the support plate group (21) is vertically fixedly connected to one side of the extension plate (22), and a soft seal (5) is fixed on the other side of the extension plate (22). A baffle (3) is provided on the other side of the support plate group (21), and the baffle (3) is rotatably connected to the adjacent support plate group (21) via a rotating shaft.

2. The carbon monoxide dissipation curtain plate at the corner of the return air in a coal mine according to claim 1, characterized in that, The soft seal (5) and the extension plate (22) are installed on the same straight line, and the included angle between the extension plate (22) and the support plate group (21) is 60°~120°.

3. The carbon monoxide dissipation curtain plate at the corner of the return air in a coal mine according to claim 1, characterized in that, The CO digestion material is housed inside the CO digestion unit group (1), and flame-retardant filter cotton (163), metal filter screen (162) and perforated plate (161) are arranged sequentially from the inside to the outside on both sides of the CO digestion material.

4. The carbon monoxide dissipation curtain plate at the corner of the return air in a coal mine according to claim 1, characterized in that, The CO digestion material is a granular CO digestion material with a particle size of 1-4 mm and a filling thickness of 3-10 mm.

5. The carbon monoxide dissipation curtain plate in the return air corner of a coal mine according to claim 1, characterized in that, Each of the support plate groups (21) includes a transmission plate and a digestion plate arranged from top to bottom. A flexible curtain is fixed on the inner side of the transmission plate, and the CO digestion unit group (1) is installed in the digestion plate.

6. The carbon monoxide dissipation curtain plate at the corner of the return air in a coal mine according to claim 5, characterized in that, A metal baffle or curtain is provided inside the absorbent plate adjacent to the baffle (3).

7. The carbon monoxide dissipation curtain plate at the corner of the return air in a coal mine according to claim 6, characterized in that, A flexible curtain is fixed to the lower side of the absorption plate.

8. The carbon monoxide dissipation curtain plate at the corner of the return air in a coal mine according to claim 5, characterized in that, A hydraulic cylinder is installed between adjacent transmission plates, and a flexible curtain is installed on the inner side of the transmission plate.

9. The carbon monoxide dissipation curtain plate at the corner of the return air in a coal mine according to claim 5, characterized in that, The baffle (3) includes an upper baffle (31) and a lower baffle (32). A hydraulic cylinder is installed on the lower baffle (32), and the other end of the hydraulic cylinder is fixed to the upper baffle (31). A flexible curtain is fixed on the inner side of the upper baffle (31).

10. A method for disposing of carbon monoxide using a carbon monoxide disposal screen in the return air corner of a coal mine, as described in any one of claims 1-9, characterized in that... Includes the following steps: The skeleton structure is set at the return air corner of the coal mining face so that the soft seal fits into the corresponding roadway wall or installation boundary; the baffle is adjusted according to the spatial dimensions of the return air corner of the coal mining face, and the absorption curtain is adjusted to be in the unfolded state.

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