Mining device and method for removing hydrogen sulfide through spiral uniform spraying and negative pressure self-absorption

Abstract

The invention discloses a mining spiral uniform spraying negative pressure self-absorption hydrogen sulfide removal device and method, and relates to the technical field of mine environment hydrogen sulfide removal, and the mining spiral uniform spraying negative pressure self-absorption hydrogen sulfide removal device comprises a reaction cylinder and a spraying pipe. An air inlet directly communicated with the external environment and an air outlet provided with a filter screen are respectively formed in two ends of the reaction cylinder. The spraying pipe is a conical reducer pipe, is spirally coiled along the inner wall of the reaction cylinder and is fixedly connected, and the starting end is communicated with the liquid supply structure; short branch pipe liquid outlet ends are arranged on the spraying pipe at intervals, the included angles between the short branch pipes and the spraying pipe are right angles, the outflow flows of all the short branch pipes are equal, nozzles are arranged at the liquid outlet ends of the short branch pipes, and liquid spraying openings of the nozzles point to the center line of the reaction cylinder; static pressure at the joint of the short branch pipe and the spraying pipe is consistent, and the atomizing effects of the nozzles are the same; after the nozzle sprays alkaline absorption fog drops, negative pressure is formed in the inner cavity of the reaction cylinder, and hydrogen sulfide-containing gas is sucked in a self-suction mode. According to the invention, no fan power is needed, so that the hydrogen sulfide gas is self-absorbed and uniformly mixed with the vaporific alkali liquid drops, and absorption and removal are completed.

Description

Technical Field

[0001] The invention relates to the technical field of removing hydrogen sulfide in a mine environment, and in particular to a device and a method for removing hydrogen sulfide by spiral uniform spraying negative pressure self-absorption for mining. Background Art

[0002] In recent years, the increase in global productivity has driven the continued growth of coal demand, resulting in coal mining activities going deeper into high-sulfur coal seams. In this process, coal mining machines break up the coal and release hydrogen sulfide gas. Hydrogen sulfide is denser than air and tends to accumulate in low-lying areas, where it spreads to key areas under the action of mine airflow and gravity. Once the concentration exceeds the safety standard of 6.6ppm, it will seriously threaten the safe production of coal mines, causing occasional and highly toxic accidents, seriously causing casualties, and restricting efficient mining. Therefore, it is necessary to treat areas with high hydrogen sulfide concentrations and high content accordingly to reduce the content and concentration of hydrogen sulfide in the area.

[0003] In the prior art, when treating hydrogen sulfide in a certain area, methods such as pre-injecting alkali solution into coal seams, spraying alkaline solution, increasing mine ventilation volume, and extracting hydrogen sulfide using a gas extraction system are usually adopted, all of which can reduce the concentration of hydrogen sulfide in a certain area, thereby making it easier for operators to perform related operations.

[0004] However, the poor water injection properties of coal seams make it difficult to effectively neutralize the hydrogen sulfide in the coal seams with pre-injected alkaline solution; although conventional spraying of alkaline solutions can reduce the outflow of hydrogen sulfide, the effect is limited; increasing the ventilation volume in mines as the last means of control can reduce the concentration of hydrogen sulfide to a certain extent, but the long-term use of fans not only consumes a lot of energy, but also increases the instability of the system, which is not conducive to long-term and effective hydrogen sulfide evacuation operations; and the use of gas extraction systems to extract hydrogen sulfide may be affected by the mine ventilation wind direction, resulting in high-concentration hydrogen sulfide areas mainly concentrated on the downwind side of the coal mining machine, and hydrogen sulfide cannot be completely eliminated, resulting in poor control effects. Summary of the invention

[0005] 1) Technical issues solved

[0006] The purpose of the present invention is to develop a corrosion-resistant device with high removal efficiency, stable operation and low energy consumption, and to provide a mining spiral uniform spray negative pressure self-absorption hydrogen sulfide removal device and method.

[0007] 2) Technical solution

[0008] To achieve the above object, the present invention provides the following technical solution: a mining spiral uniform spray negative pressure self-absorption device and method for removing hydrogen sulfide, including an absorption device, the absorption device comprising:

[0009] A reaction cylinder, wherein two ends of the reaction cylinder are respectively an air inlet and an air outlet;

[0010] A spray pipe, wherein the spray pipe is a tapered reducing pipe, and the end of the spray pipe is closed; the spray pipe is spirally coiled and fixedly connected to the inner wall of the reaction cylinder, and the spray pipe is connected to the liquid supply structure, and the spray pipe is provided with liquid outlet ends at intervals, and the flow coefficient at each liquid outlet end is equal;

[0011] A short branch pipe of the same diameter is provided at each liquid outlet, one end of the short branch pipe is fixedly connected to the spray pipe, and the other end is threadedly connected to a nozzle, the short branch pipe and the wall of the spray pipe are arranged at a right angle of 90°, and the liquid spraying port of the nozzle points to the central axis direction of the reaction cylinder;

[0012] The static pressure at the connection between each short branch pipe and the spray pipe is consistent, and the atomization effect at the nozzle is the same. After the alkaline absorption droplets are sprayed out, negative pressure is formed in the inner cavity of the reaction cylinder, and the surrounding hydrogen sulfide-containing gas is inhaled by self-priming.

[0013] Furthermore, the spray pipe is a variable diameter pipe, and the cross-sectional area of ​​the spray pipe gradually decreases along the direction from the inlet end to the closed end of the spray pipe to ensure uniform flow of each short branch pipe.

[0014] Furthermore, the uniform outflow formula of the short branch is For the uniform discharge of each short branch pipe, the side hole area f0 of the pipe wall at the connection between the short branch pipe and the spray pipe remains unchanged, that is, the diameter of each short branch pipe is the same; to keep the flow rate of each side hole equal, the static pressure p of each side hole must be guaranteed. j Equal, even if the dynamic pressure drop of the adjacent side holes at the connection between the short branch pipe and the spray pipe is equal to the pressure loss between the two side holes; to keep the flow of each side hole equal, it is also necessary to ensure that the flow coefficient μ of each side hole is equal, requiring the outflow angle α to be close to 90°, that is, the short branch pipe is set at 90° with the side wall of the spray pipe, so that the outlet alkaline liquid is kept as vertical as possible. The other end of the short branch pipe is threadedly connected with a nozzle, and the spray direction of the liquid spray port of the nozzle is toward the central axis of the reaction cylinder.

[0015] Furthermore, the nozzle is a fine atomizing nozzle, so that the alkaline absorption solution is sprayed in a uniform mist with equal flow rate after passing through the nozzle.

[0016] Furthermore, the reaction cylinder is provided with a filter at the gas outlet.

[0017] Furthermore, the absorption device also includes:

[0018] A liquid storage tank, the liquid storage tank is used to contain an alkaline absorption solution, and the liquid storage tank can move together with the reaction cylinder;

[0019] A liquid supply pipe, both ends of which are connected to the liquid storage tank and the spray pipe respectively, a liquid supply pump is installed at one end of the liquid supply pipe close to the liquid storage tank, and a flow meter and a pressure gauge are connected in series.

[0020] Furthermore, it also includes a bottom plate, which is used to support the reaction cylinder and the liquid storage tank;

[0021] A plurality of universal wheels are installed on the bottom wall of the bottom plate.

[0022] Furthermore, the bottom plate is provided with a retractable handle, and the outer wall of the retractable handle is covered with anti-slip material.

[0023] Further, a mining spiral uniform spray negative pressure self-absorption hydrogen sulfide removal device applied to any one of claims 1-8, the method comprising the following steps:

[0024] Moving the absorption device to the processing station via the moving device;

[0025] Start the liquid supply component and spray the alkaline absorption solution stored in the liquid storage tank into the reaction cylinder through the nozzle to form a negative pressure in the reaction cylinder, and suck the hydrogen sulfide gas around the workstation to be treated into the reaction cylinder for neutralization reaction with the alkaline absorption droplets.

[0026] Furthermore, the spray assembly is spirally wound along the inner wall of the reaction cylinder, and a plurality of nozzles are evenly arranged;

[0027] The liquid supply pressure of the liquid supply pump is 0.5-0.7MPa;

[0028] The pH value of the alkaline absorption droplets sprayed from each nozzle is 8-12.

[0029] III) Beneficial effects

[0030] Compared with the prior art, the device and method for removing hydrogen sulfide by spiral uniform spraying negative pressure self-absorption for mining has the following beneficial effects:

[0031] 1. The present invention provides a spray assembly, and the flow of alkaline absorption droplets can form a negative pressure zone in the inner cavity of the reaction tube, so that the gas containing hydrogen sulfide can automatically enter the interior of the reaction tube by self-priming without using a fan, and perform corresponding absorption and removal.

[0032] 2. The present invention can atomize the alkaline absorption solution by using a nozzle. The alkaline solution flows out of each short branch pipe at an equal flow rate evenly, forming a uniform flow field in the reaction tube. The solution can be evenly sprayed to every corner of the reaction tube, greatly improving the contact area between the alkaline droplets and the gas and enhancing the removal efficiency of hydrogen sulfide. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0034] Figure 2 It is a schematic diagram of the side view structure in the present invention;

[0035] Figure 3 It is a schematic diagram of the first viewing angle structure in the present invention;

[0036] Figure 4 It is a schematic diagram of the second viewing angle structure in the present invention;

[0037] Figure 5 It is a schematic diagram of the structure from a top-down perspective in the present invention;

[0038] Figure 6 It is a schematic cross-sectional view of the spray pipe in the present invention.

[0039] In the figure: 1. mobile device; 11. bottom plate; 12. universal wheel; 13. retractable handle; 14. fixed table; 2. absorption device; 21. reaction cylinder; 211. flange; 212. filter; 22. bracket; 23. liquid supply assembly; 231. liquid storage tank; 232. liquid supply pipe; 233. liquid supply pump; 234. flow meter; 235. pressure gauge; 24. spray assembly; 241. spray pipe; 242. short branch pipe; 243. nozzle. DETAILED DESCRIPTION

[0040] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0041] like Figure 1-6 As shown, the present invention provides a technical solution: a device and method for removing hydrogen sulfide by spiral uniform spray negative pressure self-absorption for mining.

[0042] Reference Figure 1 , Figure 2 and Figure 3 A device and method for removing hydrogen sulfide by spiral uniform spraying negative pressure self-absorption for mining includes a moving device 1 and an absorption device 2.

[0043] Reference Figure 1 , Figure 2 and Figure 3 The mobile device 1 includes a bottom plate 11. In this embodiment, the bottom plate 11 is preferably a rectangular bottom plate 11, and the length of the bottom plate 11 is preferably 2m and the width is preferably 1.5m.

[0044] Reference Figure 1, Figure 2 and Figure 3 The mobile device 1 includes a universal wheel 12. In this embodiment, the universal wheel 12 is preferably a universal caster with a locking structure. There are multiple universal wheels 12, and the bottom wall of the base plate 11 is provided with a universal wheel 12 at each corner. The shell of the universal wheel 12 is fixedly connected to the base plate 11 by screws. Here, the material of the universal wheel 12 is preferably a high-load bearing material.

[0045] Reference Figure 1 , Figure 2 and Figure 3 A retractable handle 13 is provided at the left end of the base plate 11. In this embodiment, the elongation of the retractable handle 13 is set at 1:3. The retractable handle 13 is located at 0.375m from the left end of the left side of the base plate 11, and the maximum length of the retractable handle 13 is preferably 1.5m. The installation angle is 45°. The retractable handle 13 consists of three sections, and two adjacent sections are slidably connected. The length of each section of the retractable handle 13 is preferably 0.5m.

[0046] Reference Figure 1 , Figure 2 and Figure 3 The surface of the telescopic handle 13 is provided with anti-slip material, and the material of the connecting part of the telescopic handle 13 is preferably a high-strength alloy.

[0047] The retractable handle 13 is provided with three gears for users to adjust according to the principle of ergonomics. The surface of the retractable handle 13 is provided with anti-slip material, which can provide better comfort and control when the operator pushes or pulls the device.

[0048] The connection of the retractable handle 13 is made of high-strength alloy, which can provide sufficient guarantee for the stability and durability of the device as a whole, and avoid the handle from loosening and falling off during use, thereby affecting the work effect of the operator.

[0049] Reference Figure 1 , Figure 2 and Figure 3 A fixing platform 14 is provided at one end of the bottom plate 11 away from the retractable handle 13 and at the edge of the bottom plate 11. In this embodiment, the fixing platform 14 is preferably a rectangular platform, and the fixing platform 14 is fixedly connected to the bottom plate 11 by screws.

[0050] Reference Figure 1 , Figure 2 and Figure 3The absorption device 2 includes a reaction tube 21, which is horizontally arranged, and the axis direction of the reaction tube 21 is horizontal and perpendicular to the long side direction of the bottom plate 11. The reaction tube 21 is located between the fixed platform 14 and the retractable handle 13. In this embodiment, the reaction tube 21 is preferably a hollow cylindrical body. In this embodiment, the diameter (Φ) of the reaction tube 21 is preferably 610 mm.

[0051] Reference Figure 1 , Figure 2 and Figure 3 Both ends of the reaction tube 21 are open, one end of which is an air inlet, and the air flow direction is from the air inlet to the air outlet.

[0052] Reference Figure 1 , Figure 2 and Figure 3 Both ends of the reaction tube 21 are coaxially provided with flanges 211, and the flanges 211 are fixedly connected to the reaction tube 21 by welding.

[0053] Reference Figure 1 , Figure 2 and Figure 3 The absorption device 2 further includes a filter screen 212, which is located at one end of the gas outlet of the reaction cylinder 21, and is fixedly connected to the flange 211 by screws. In this embodiment, the pore size of the filter screen 212 is preferably 5-10 mm.

[0054] The setting of the filter 212 can block the alkaline absorption droplets to a certain extent and prevent the alkaline absorption droplets from quickly diffusing to the external environment. At the same time, the alkaline absorption droplets can wet the filter 212. When the hydrogen sulfide gas passes through the filter 212, the filter 212 wetted by the alkaline absorption droplets can further absorb the hydrogen sulfide gas, thereby ensuring the absorption effect of the hydrogen sulfide gas and reducing the concentration of the hydrogen sulfide gas.

[0055] Reference Figure 1 , Figure 2 and Figure 3 A bracket 22 is provided below the reaction tube 21, and two brackets 22 are provided. The two brackets 22 are arranged in sequence along the axial direction of the reaction tube 21. In this embodiment, the bracket 22 is preferably a trapezoidal block. The bracket 22 is perpendicular to the axis of the reaction tube 21. The top wall of the bracket 22 is provided with a mounting groove, and the mounting groove is used to clamp the reaction tube 21. The bracket 22 and the reaction tube 21 are fixedly connected.

[0056] Reference Figure 1 , Figure 2 and Figure 3The absorption device 2 further includes a liquid supply assembly 23, which includes a liquid storage tank 231, a liquid supply pipe 232, a liquid supply pump 233, a flow meter 234 and a pressure gauge 235. The liquid storage tank 231 is fixed to the bottom plate 11, one end of the liquid supply pipe 232 is penetrated through the liquid storage tank 231 and is fixedly connected to the liquid storage tank 231, and the other end is penetrated through the side wall of the end of the reaction cylinder 21 close to the air inlet and is fixedly connected to the reaction cylinder 21. The liquid supply pump 233, the flow meter 234 and the pressure gauge 235 are all installed in series on the liquid supply pipe 232. In this embodiment, the liquid supply pump 233, the flow meter 234 and the pressure gauge 235 are arranged in sequence from the liquid storage tank 231 to the reaction cylinder 21, and the flow meter 234 and the pressure gauge 235 are fixedly connected to the liquid supply pipe 232.

[0057] Reference Figure 1 , Figure 2 and Figure 3 , the absorption device 2 also includes a spray assembly 24, the spray assembly 24 is located on the inner wall of the reaction tube 21, and the spray assembly 24 includes a spray pipe 241 and a short branch pipe 242. In this embodiment, the spray pipe 241 is preferably a tapered variable diameter spiral pipe, the end of the spray pipe 241 is connected to the liquid supply pipe 232, and the spray pipe 241 is evenly spot-welded and installed close to the inner wall of the reaction tube 21. The diameter range (Φ) of the spray pipe 241 is preferably 40 to 20 mm, the spiral diameter is preferably 570 mm, and the pitch is preferably 400 mm. The spray pipe 241 is preferably made of corrosion-resistant materials such as polyvinyl chloride, polyethylene or polypropylene. Here, a plurality of short branch pipes 242 are provided. In this embodiment, the number of short branch pipes 242 is preferably 15, and the angle between the short branch pipe 242 and the spray pipe 241 is 90°. The diameter (Φ) of each short branch pipe 242 is preferably 12.5 mm, the length is preferably 50 mm, and the spacing is preferably 220 mm.

[0058] By means of this installation method and installation angle, the alkali solution and other flow rates can be uniformly discharged from each short branch pipe 242, and the reaction flow field of the reaction tube 21 can be uniform.

[0059] Reference Figure 1 , Figure 2 and Figure 3 A nozzle 243 is provided at the end of the short branch pipe 242, and the liquid spraying port of the nozzle 243 is oriented toward the central axis direction of the reaction tube 21. In this embodiment, the nozzle 243 is preferably a fine atomizing nozzle 243, and the nozzle 243 is connected to the short branch pipe 242 by a threaded connection.

[0060] The setting of the nozzle 243 can effectively atomize the alkaline absorption solution, increase the contact area between the hydrogen sulfide gas and the liquid, increase the absorption rate, and thus better absorb the hydrogen sulfide gas and reduce the concentration of the hydrogen sulfide gas. In addition, the continuous renewal of the droplets can ensure the stable absorption of the hydrogen sulfide gas.

[0061] The operator first transfers the alkaline absorption solution from the liquid storage tank 231 to the spray pipe 241 through the liquid supply pipe 232 by the liquid supply pump 233. The short branch pipe 242 is arranged at right angles to the wall of the spray pipe 241, so as to achieve an equal flow rate of alkaline solution from each short branch pipe 242, forming a uniform flow field in the reaction cylinder 21, and the alkaline absorption solution is atomized by the nozzle 243, so that it can be evenly sprayed to every corner of the reaction cylinder 21. The atomized alkaline absorption solution is in the reaction cylinder 21 under the action of inertial motion. The inner cavity of 21 forms a negative pressure zone, so that the hydrogen sulfide gas automatically enters the negative pressure zone without using a fan and contacts with the alkaline absorption droplets. The atomization effect greatly increases the contact area between the alkaline absorption droplets and the hydrogen sulfide gas, thereby improving the reaction efficiency between them, and then the alkaline absorption droplets complete the absorption of the hydrogen sulfide gas. The whole process does not require the help of external fans or other power equipment to promote the flow and mixing of the gas, thereby significantly reducing the energy consumption and operating costs of the system.

[0062] Among them, the short branch pipe 242 adopts uniform flow rate outflow spray; according to the uniform outflow formula of the short branch pipe 242 To keep the area f0 of the side hole of the spray pipe 241 constant and supply liquid uniformly, the static pressure p of each side hole of the spray pipe 241 must be guaranteed to be equal. j and flow coefficient μ; the dynamic pressure drop of the adjacent side holes at the connection between the short branch pipe 242 and the spray pipe 241 is equal to the pressure loss between the two side holes to ensure the static pressure p of each side hole j The short branch pipe 242 is equal to the side wall of the spray pipe, so that the angle of the short branch pipe 242 is 90 degrees, that is, the outflow angle α is 90 degrees, so as to ensure that the flow coefficient μ of each side hole is equal. The other end of the short branch pipe 242 is threadedly connected to the fine atomizing nozzle 243.

[0063] Three measuring points are respectively set at the inlet, middle and outlet of the reaction tube 21. Before the experiment, the concentration of hydrogen sulfide gas in the environment is detected and the air in the reaction tube 21 is emptied, and then the alkaline absorption solution is introduced for absorption.

[0064] In this scheme, the alkaline absorption solution used is sodium hydroxide solution. Under different pressures, the absorption effect is different:

[0065] Example 1

[0066] Sodium hydroxide (NaOH), pH is 8, the liquid supply pump adjusts the pressure to 0.5Mpa, and the volume is 5L.

[0067] Example 2

[0068] Sodium hydroxide (NaOH), pH is 8, the liquid supply pump adjusts the pressure to 0.7Mpa, and the volume is 5L.

[0069] Example 3

[0070] Sodium hydroxide (NaOH), pH is 12, the liquid supply pump adjusts the pressure to 0.5Mpa, and the volume is 5L.

[0071] Example 4

[0072] Sodium hydroxide (NaOH), pH is 12, the liquid supply pump adjusts the pressure to 0.7Mpa, and the volume is 5L.

[0073] The desulfurization effect data of Examples 1 to 4 are shown in Table 1. As can be seen from Table 1, for a hydrogen sulfide-air mixed gas with a hydrogen sulfide concentration of 80 ppm, after desulfurization treatment by the method of the present invention, the hydrogen sulfide concentration in the obtained purified gas is 3.5 to 0.3 ppm, and the removal rate reaches 95.63% to 99.63%, which has a good desulfurization effect.

[0074]

Claims

1. A spiral uniform spray negative pressure self-absorption device for removing hydrogen sulfide for mining, characterized by: The invention comprises an absorption device (2), wherein the absorption device (2) comprises: A reaction cylinder (21), wherein two ends of the reaction cylinder (21) are respectively an air inlet and an air outlet; A spray pipe (241), wherein the spray pipe (241) is a tapered reducing pipe, and the end of the spray pipe (241) is closed; the spray pipe (241) is spirally wound and fixedly connected to the inner wall of the reaction cylinder (21), and the spray pipe (241) is connected to the liquid supply structure, and the spray pipe (241) is provided with liquid outlet ends at intervals, and the flow coefficient at each liquid outlet end is equal; A short branch pipe (242) of the same diameter is provided at each liquid outlet end, one end of the short branch pipe (242) is fixedly connected to the spray pipe (241), and the other end is threadedly connected to a nozzle (243), the angle between the short branch pipe (242) and the wall of the spray pipe (241) is 90 degrees, and the liquid spraying port of the nozzle (243) points to the central axis direction of the reaction cylinder (21); The static pressure at the connection point between each short branch pipe (242) and the spray pipe (241) is consistent, and the atomization effect at the nozzle (243) is the same. After the alkaline absorption solution is sprayed out, a negative pressure is formed in the inner cavity of the reaction cylinder (21), and the surrounding hydrogen sulfide-containing gas is sucked in by self-priming.

2. A mining spiral uniform spray negative pressure self-absorption hydrogen sulfide removal device according to claim 1, characterized in that: The spray pipe (241) is a reducer, and the cross-sectional area of ​​the spray pipe (241) gradually decreases from the inlet end to the closed end of the spray pipe (241) to ensure uniform flow of each short branch pipe (242).

3. A mining spiral uniform spray negative pressure self-absorption hydrogen sulfide removal device according to claim 1, characterized in that: The uniform outflow formula of the short branch pipe (242) is: For uniform liquid discharge from each short branch pipe (242), the side hole area f0 of the pipe wall at the connection between the short branch pipe (242) and the spray pipe (241) remains unchanged, that is, the pipe diameters of each short branch pipe (242) are the same; in order to keep the flow rate of each side hole equal, the static pressure p of each side hole must be guaranteed. j The short branch pipe (242) and the spray pipe (241) are equal, even if the dynamic pressure drop of the adjacent side holes at the connection between the short branch pipe (242) and the spray pipe (241) is equal to the pressure loss between the two side holes; to keep the flow of each side hole equal, it is also necessary to ensure that the flow coefficient μ of each side hole is equal, requiring the outflow angle α to be close to 90°, that is, the short branch pipe (242) and the spray pipe (241) wall are set at 90°, so that the outlet water flow is kept as vertical as possible. The other end of the short branch pipe is threadedly connected with a nozzle (243), and the spray direction of the liquid spray port of the nozzle (243) is toward the central axis of the reaction cylinder (21).

4. A mining spiral uniform spray negative pressure self-absorption hydrogen sulfide removal device according to claim 1, characterized in that: The nozzle (243) is a fine atomizing nozzle (243), so that the alkaline absorption solution is sprayed in a uniform mist with an equal flow rate after passing through the nozzle (243).

5. The device for removing hydrogen sulfide by spiral uniform spraying and negative pressure self-absorption for mining according to claim 1 is characterized in that: The reaction cylinder (21) is provided with a filter screen (212) at the gas outlet.

6. The device for removing hydrogen sulfide by spiral uniform spraying and negative pressure self-absorption for mining according to claim 1 is characterized in that: The absorption device (2) further comprises: A liquid storage tank (231), the liquid storage tank (231) is used to contain an alkaline absorption solution, and the liquid storage tank (231) can move together with the reaction cylinder (21); A liquid supply pipe (232), wherein both ends of the liquid supply pipe (232) are respectively connected to the liquid storage tank (231) and the spray pipe (241); a liquid supply pump (233) is installed at one end of the liquid supply pipe (232) close to the liquid storage tank (231), and a flow meter (234) and a pressure gauge (235) are connected in series.

7. The device for removing hydrogen sulfide by spiral uniform spraying and negative pressure self-absorption for mining according to claim 1 is characterized in that: It also includes a bottom plate (11), wherein the bottom plate (11) is used to carry the reaction cylinder (21) and the liquid storage tank (231); A plurality of universal wheels (12) are installed on the bottom wall of the bottom plate (11).

8. A mining spiral uniform spray negative pressure self-absorption hydrogen sulfide removal device according to claim 7, characterized in that: The bottom plate (11) is provided with a retractable handle (13), and the outer wall of the retractable handle (13) is covered with anti-slip material.

9. A method for removing hydrogen sulfide by spiral uniform spray negative pressure self-absorption for mining, characterized in that: A mining spiral uniform spray negative pressure self-absorption hydrogen sulfide removal device applied to any one of claims 1-8, the method comprising the following steps: The absorption device (2) is moved to a processing station via the moving device (1); The liquid supply component (23) is started to spray the alkaline absorption solution stored in the liquid storage tank (231) into the reaction tube (21) through the nozzle (243) to form a negative pressure in the reaction tube (21), so that the hydrogen sulfide gas around the workstation to be treated is sucked into the reaction tube (21) to react with the alkaline absorption droplets for neutralization.

10. The method for removing hydrogen sulfide by negative pressure self-absorption with spiral uniform spray for mining according to claim 9, characterized in that: The spray assembly (24) is spirally wound along the inner wall of the reaction cylinder (21) and is evenly provided with a plurality of nozzles (243); The liquid supply pressure of the liquid supply pump (233) is 0.5-0.7 MPa; The pH value of the alkaline absorption droplets sprayed by each nozzle (243) is 8-12.

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