Tunneling working face ventilation air methane recycling treatment equipment and method

Abstract

The invention belongs to the technical field of environmental protection equipment, and particularly discloses tunneling working face ventilation air methane recycling treatment equipment and method. According to the equipment and the method, the problem that the air volume of the driving face is insufficient can be solved, the air cooling capacity of the exhausted air can be recycled, an air duct in a driving roadway is not matched with existing refrigeration equipment, or even if the air duct is matched with the existing refrigeration equipment, the existing refrigeration equipment can operate with low energy consumption; a local fan matched with an air duct in the tunneling roadway also runs at low energy consumption, so that the running energy consumption of the whole ventilation and refrigeration system is low; meanwhile, before the ventilation air methane is conveyed to the driving working face again, water vapor and dust in ventilation air methane air flow are removed, cooling treatment is conducted, and dry, cold and clean air flow is conveyed to the driving working face; the solution regeneration module runs to ensure that the ventilation air methane treatment module is in high activity and reaction treatment efficiency, and in the running process of the solution regeneration module, ventilation air methane is sucked in to remove dust, and the working environment of a roadway behind the driving working face is improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of environmental protection equipment, and in particular relates to a device and method for recycling exhaust air from a tunneling working face. Background Art

[0002] As the mining depth of metal mines increases, the ventilation network becomes more and more complex, and the ventilation resistance increases, resulting in ventilation difficulties and insufficient air volume at many work sites. As the mining depth increases, the temperature of the surrounding rock underground increases, and the temperature in the construction area is high, which seriously affects construction safety. In the existing excavation face ventilation of metal mines, the fresh air flow is first cooled by the refrigeration equipment. After the cooled fresh air flow is transported by the fan through the excavation face, the exhaust air temperature is still low, and the cooling capacity is not fully utilized. In order to maintain the appropriate temperature of the excavation face, the refrigeration equipment is still required to provide a higher cooling capacity, and the fan also needs to supply a large amount of air volume, which consumes a lot of energy. In addition, the exhaust air of the excavation face carries a lot of dust, resulting in a poor working environment in the tunnel behind the excavation face, affecting the health of the operators and the safety of excavation construction. Summary of the invention

[0003] The purpose of the present invention is to provide a device and method for recycling the exhausted air in the excavation working face, so as to solve the problem of insufficient air volume in the excavation working face, realize the recycling of the exhausted air cooling capacity in the excavation working face, and purify the exhausted air at the same time.

[0004] In order to achieve the above object, the technical solutions adopted by the present invention are as follows:

[0005] A device for recycling and treating exhaust air from a tunneling working face, comprising:

[0006] A base, movable relative to the ground;

[0007] An exhaust air processing module is arranged on the base, one end of the exhaust air processing module is connected to the first air inlet, and the other end is connected to the first air outlet, and the first air outlet is connected to the air duct arranged in the excavation tunnel through the transition air duct;

[0008] A first fan, disposed at the first air inlet and / or the first air outlet, for sequentially generating airflow at the first air inlet, the exhaust air processing module and the first air outlet;

[0009] A solution regeneration module is arranged on the base, one end of the solution regeneration module is connected to the second air inlet, and the other end is connected to the second air outlet, and the second air outlet is connected to the return air duct;

[0010] A second fan, disposed at the second air inlet and / or the second air outlet, for sequentially generating airflow at the second air inlet, the solution regeneration module and the second air outlet;

[0011] The refrigeration and heat exchange module is arranged on the base and is used for exchanging cold and heat with the exhaust air treatment module and the solution regeneration module.

[0012] Further, the exhaust air treatment module includes a first wind box, an exhaust air treatment wet curtain, a first liquid distributor, a dehumidification solution tank and a first dust collection tray;

[0013] The first wind box is arranged on the base, and opposite ends of the first wind box are respectively connected to a first air inlet and a first air outlet;

[0014] The exhaust air treatment wet curtain is arranged in the first wind box;

[0015] The first liquid distributor is arranged in the first wind box and above the exhaust air treatment wet curtain, and the first liquid distributor is used to spray the solution to the exhaust air treatment wet curtain;

[0016] The dehumidification solution tank is arranged in the first wind box and below the exhaust air treatment wet curtain, and the solution sprayed to the exhaust air treatment wet curtain falls into the dehumidification solution tank;

[0017] The first dust collecting tray is arranged in the first wind box and between the exhaust air treatment wet curtain and the dehumidification solution box.

[0018] Furthermore, the air exhaust treatment wet curtain is a honeycomb structure.

[0019] Further, the solution regeneration module includes a second wind box, a regeneration wet curtain, a second liquid distributor, a regeneration solution tank and a second dust collection tray;

[0020] The second wind box is arranged on the base, and the opposite two ends of the second wind box are respectively connected to the second air inlet and the second air outlet;

[0021] The regeneration wet curtain is arranged in the second wind box;

[0022] The second liquid distributor is arranged in the second wind box and above the regeneration wet curtain, and the second liquid distributor is used to spray solution to the regeneration wet curtain;

[0023] The regeneration solution tank is arranged in the second wind box and below the regeneration wet curtain, and the solution sprayed to the regeneration wet curtain falls into the regeneration solution tank;

[0024] The second dust collecting tray is arranged in the second wind box and between the regeneration wet curtain and the regeneration solution tank.

[0025] Furthermore, the regenerative wet curtain is a honeycomb structure.

[0026] Furthermore, the refrigeration and heat exchange module includes a compressor, a condenser, an expansion valve and an evaporator, and the compressor, the condenser, the expansion valve and the evaporator are connected in series via pipelines.

[0027] Furthermore, the refrigeration and heat exchange module further includes a first solution pump, a second solution pump, a first heat exchanger and a second heat exchanger;

[0028] The liquid inlet of the first solution pump is connected to the dehumidification solution tank via the first liquid inlet pipeline, the liquid outlet of the first solution pump is connected to the first liquid distribution pipeline and the first liquid exchange pipeline respectively, the first liquid distribution pipeline is connected to the first liquid distributor, and the first liquid exchange pipeline is connected to the regeneration solution tank;

[0029] The liquid inlet of the second solution pump is connected to the regeneration solution tank via the second liquid inlet pipeline, the liquid outlet of the second solution pump is connected to the second liquid distribution pipeline and the second liquid exchange pipeline respectively, the second liquid distribution pipeline is connected to the second liquid distributor, and the second heat exchange pipeline is connected to the dehumidification solution tank;

[0030] The first liquid distribution pipeline flows through the first heat exchanger, the evaporator is arranged on the first heat exchanger, and the first liquid distribution pipeline and the evaporator realize the exchange of cold and heat;

[0031] The second liquid distribution pipeline flows through the second heat exchanger, and the condenser is arranged on the second heat exchanger, so that cold and heat exchange is realized between the second liquid distribution pipeline and the condenser.

[0032] Furthermore, a third heat exchanger is included, and the first liquid exchange pipeline and the second liquid exchange pipeline both flow through the third heat exchanger, and cold and heat exchange is achieved between the first liquid exchange pipeline and the second liquid exchange pipeline.

[0033] Furthermore, it also includes a controller, a first liquid level gauge, a second liquid level gauge, a first solenoid valve, and a second solenoid valve;

[0034] The first liquid level gauge is disposed in the dehumidification solution tank, and the second liquid level gauge is disposed in the regeneration solution tank;

[0035] A first solenoid valve is provided on the first liquid distribution pipeline and / or the first liquid exchange pipeline; a second solenoid valve is provided on the second liquid distribution pipeline and / or the second liquid exchange pipeline;

[0036] The controller is connected to the first liquid level meter, the second liquid level meter, the first solenoid valve and the second solenoid valve via signal cables respectively.

[0037] A method for recycling exhaust air from a tunneling working face, using the exhaust air recycling treatment device for a tunneling working face, the method comprises the following steps:

[0038] Step 1: Arrange the exhaust air recycling treatment equipment of the excavation working face at the position of the excavation working face, connect the first air outlet to the air duct arranged in the excavation tunnel through the transition air duct, and the end of the air duct in the excavation tunnel faces the excavation working face;

[0039] Step 2: The end of the wind tube in the excavation tunnel conveys airflow to the excavation working face, and the exhaust air recycling treatment equipment of the excavation working face is started, and the exhaust air returning from the excavation working face enters the first air inlet and the second air inlet;

[0040] The exhaust air flow entering from the first air inlet enters the first wind box and contacts the low-temperature concentrated solution on the exhaust air treatment wet curtain. The water vapor in the exhaust air flow is transferred to the solution. The dust in the exhaust air flow is adsorbed on the exhaust air treatment wet curtain and is sprayed with solution by the first liquid distributor to the exhaust air treatment wet curtain and flushed to the first dust collecting tray. The solution sprayed by the first liquid distributor to the exhaust air treatment wet curtain finally falls into the dehumidification solution box. The exhaust air flow is finally transported to the excavation working face through the first air outlet, the transition air duct and the air duct in the excavation tunnel.

[0041] The exhaust air flow entering from the second air inlet enters the second wind box and contacts the high-temperature dilute solution on the regeneration wet curtain, taking away the water vapor evaporated from the high-temperature dilute solution. The dust in the exhaust air flow is adsorbed on the regeneration wet curtain and is washed by the second liquid distributor spraying solution on the regeneration wet curtain and falls to the second dust collecting tray. The second liquid distributor sprays solution on the regeneration wet curtain and finally falls to the regeneration solution tank. The exhaust air flow is finally discharged through the second air outlet and the return air duct.

[0042] at the same time,

[0043] The first solution pump transports the solution in the dehumidification solution tank to the first liquid distributor and the regeneration solution tank, and the second solution pump transports the solution in the regeneration solution tank to the second liquid distributor and the dehumidification solution tank.

[0044] The beneficial technical effects of the present invention are:

[0045] The exhaust air recycling treatment equipment and method for the excavation working face of the present invention can solve the problem of insufficient air volume at the excavation working face and realize the reuse of the exhaust air cooling capacity of the excavation working face. The air duct in the excavation tunnel does not need to be equipped with existing refrigeration equipment, or even if it is equipped with existing refrigeration equipment, the existing refrigeration equipment can operate with low energy consumption, and the local fans equipped with the air duct in the excavation tunnel can also operate with low energy consumption, so that the overall ventilation and refrigeration system has low operating energy consumption; at the same time, before the exhaust air is transported to the excavation working face again, the water vapor and dust in the exhaust air flow are first removed, and the temperature is reduced to transport dry, cold and clean air flow to the excavation working face; the solution regeneration module is operated to ensure that the exhaust air treatment module is in a high activity and reaction treatment efficiency, and during the operation of the solution regeneration module, the exhaust air is sucked in to remove dust, thereby improving the working environment of the tunnel behind the excavation working face. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] Figure 1 This is a layout diagram of the exhaust air recycling treatment equipment in the excavation tunnel of the excavation working face according to an embodiment of the present invention;

[0047] Figure 2This is a schematic diagram of the external structure of the exhaust air recycling processing equipment for the excavation working face according to an embodiment of the present invention;

[0048] Figure 3 This is a schematic diagram of the internal structure of the exhaust air recycling processing equipment for the tunneling working face according to an embodiment of the present invention;

[0049] Figure 4 This is a schematic diagram of the internal structure of the exhaust air treatment module according to an embodiment of the present invention;

[0050] Figure 5 This is a schematic diagram of the internal structure of a solution regeneration module according to an embodiment of the present invention;

[0051] Figure 6 This is a schematic diagram of the internal structure of the main part of the solution refrigeration heat exchange module according to an embodiment of the present invention;

[0052] Figure 7 A three-dimensional diagram of a liquid distributor according to an embodiment of the present invention;

[0053] Figure 8 A three-dimensional diagram of a dust collection tray according to an embodiment of the present invention;

[0054] Fig. 9 It is a three-dimensional diagram of a lock according to an embodiment of the present invention. DETAILED DESCRIPTION

[0055] In order to make the purpose, technical scheme and beneficial effects of the present invention more clearly understood, the present invention is further described in detail below in combination with specific embodiments and with reference to the accompanying drawings. Certain embodiments of the present invention will be described more comprehensively with reference to the accompanying drawings, in which some but not all embodiments will be shown. In fact, the various embodiments of the present invention can be implemented in many different forms and should not be construed as being limited to the embodiments described herein; rather, these embodiments are provided so that the present invention meets applicable legal requirements.

[0056] In the description of the present invention, it should be noted that the terms "inside", "outside", "upper", "lower", "front", "back" and the like indicate directions or positional relationships based on directions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0057] In an embodiment of the present invention, a device and method for recycling exhaust air from a tunneling working face are provided. Please refer to Figures 1 to 9 shown.

[0058] A ventilation air recycling and processing device for a tunneling working face comprises a base 1, a ventilation air processing module 2, a first fan 31, a solution regeneration module 4, a second fan 32 and a refrigeration and heat exchange module 5.

[0059] A plurality of rollers 10 are provided at the lower end of the base 1, and the rollers 10 are in contact with the ground. The base 1 can move relative to the ground so as to arrange the equipment at the position of the excavation working face. The exhaust air treatment module 2 is arranged on the base 1 and above the solution regeneration module 4. One end of the exhaust air treatment module 2 is connected to the first air inlet 11, and the other end is connected to the first air outlet 12. The first air outlet 12 is connected to the air duct 61 arranged in the excavation tunnel through the transition air duct 62. The first fan 31 is arranged at the first air inlet 11, and is used to generate airflow in the first air inlet 11, the exhaust air treatment module 2 and the first air outlet 12 in sequence. The solution regeneration module 4 is arranged on the base 1, and one end of the solution regeneration module 4 is connected to the second air inlet 13, and the other end is connected to the second air outlet 14. The second air outlet 14 is connected to the return air duct 63. The second fan 32 is arranged at the second air inlet 13, and is used to generate airflow in the second air inlet 13, the solution regeneration module 4 and the second air outlet 14 in sequence. The refrigeration and heat exchange module 5 is arranged on the base 1 , and its main body is located below the solution regeneration module 4 , and is used for exchanging cold and heat between the exhaust air treatment module 2 and the solution regeneration module 4 .

[0060] The exhaust air treatment module 2 includes a first wind box 21, an exhaust air treatment wet curtain 22, a first liquid distributor 23, a dehumidification solution tank 24 and a first dust collection tray 25. The first wind box 21 is arranged above the base 1, and the opposite ends of the first wind box 21 are connected to the first air inlet 11 and the first air outlet 12 respectively. The exhaust air treatment wet curtain 22 is arranged in the first wind box 21, and the first liquid distributor 23 is arranged in the first wind box 21 and above the exhaust air treatment wet curtain 22, and the first liquid distributor 23 is used to spray solution to the exhaust air treatment wet curtain 22; the dehumidification solution tank 24 is arranged in the first wind box 21 and below the exhaust air treatment wet curtain 22, and the solution sprayed to the exhaust air treatment wet curtain 22 falls into the dehumidification solution tank 24; the first dust collection tray 25 is arranged in the first wind box 21 and between the exhaust air treatment wet curtain 22 and the dehumidification solution tank 24. The exhaust air treatment wet curtain 22 , the first dust collecting tray 25 and the dehumidification solution tank 24 are connected and supported by the first support column 26 .

[0061] The solution used in this embodiment is one or a mixed solution of lithium bromide solution, lithium chloride solution, and calcium chloride solution, which absorbs water vapor in the wind flow when the concentration is high.

[0062] The first liquid distributor 23 sprays a low-temperature concentrated solution onto the exhaust air treatment wet curtain 22, and the exhaust air flow entering the first wind box 21 from the first air inlet 11 contacts the low-temperature concentrated solution on the exhaust air treatment wet curtain 22, and the water vapor in the exhaust air flow is absorbed by the solution and transferred to the solution, and the dust in the exhaust air flow is adsorbed onto the exhaust air treatment wet curtain 22 and washed by the solution sprayed by the first liquid distributor 23 onto the exhaust air treatment wet curtain 22 and falls onto the first dust collecting tray 25, and the solution sprayed by the first liquid distributor 23 onto the exhaust air treatment wet curtain 22 finally falls into the dehumidification solution tank 24, and the temperature of the exhaust air flow decreases after contacting the low-temperature concentrated solution on the exhaust air treatment wet curtain 22, and the exhaust air flow finally transports dry, cold and clean air flow to the excavation working face through the first air outlet 12, the transition air duct 62 and the air duct 61 in the excavation tunnel, thereby increasing the air volume transported to the excavation working face, reducing the temperature of the excavation working face, and reducing the energy consumption of refrigeration and ventilation.

[0063] The solution regeneration module 4 includes a second wind box 41, a regeneration wet curtain 42, a second liquid distributor 43, a regeneration solution tank 44 and a second dust collection tray 45. The second wind box 41 is arranged at the middle and lower position of the base 1, and the opposite ends of the second wind box 41 are connected to the second air inlet 13 and the second air outlet 14 respectively. The regeneration wet curtain 42 is arranged in the second wind box 41, and the second liquid distributor 43 is arranged in the second wind box 41 and above the regeneration wet curtain 42, and the second liquid distributor 43 is used to spray the solution to the regeneration wet curtain 42; the regeneration solution tank 44 is arranged in the second wind box 41 and below the regeneration wet curtain 42, and the solution sprayed to the regeneration wet curtain 42 falls into the regeneration solution tank 44; the second dust collection tray 45 is arranged in the second wind box 41 and between the regeneration wet curtain 42 and the regeneration solution tank 44. Among them, the regeneration wet curtain 42, the second dust collection tray 45 and the regeneration solution tank 44 are connected and supported by the second support 46.

[0064] The second liquid distributor 43 sprays a high-temperature dilute solution onto the regeneration wet curtain 42. The exhaust airflow entering from the second air inlet 13 contacts the high-temperature dilute solution on the regeneration wet curtain 42. The airflow carries away the evaporated water vapor of the high-temperature dilute solution. The dust in the exhaust airflow is adsorbed onto the regeneration wet curtain 42 and washed by the solution sprayed by the second liquid distributor 43 onto the regeneration wet curtain 42 and falls to the second dust collecting tray 45. The solution sprayed by the second liquid distributor 43 onto the regeneration wet curtain 42 finally falls to the regeneration solution box 44. The dust in the exhaust airflow is removed. The exhaust airflow is finally discharged along the top of the tunnel through the second air outlet 14 and the return air duct 63, improving the working environment of the tunnel behind the excavation working face. The return air duct 63 is provided with three vertically arranged heat pipes 631, which are used to condense the exhaust airflow flowing through the return air duct 63, and the precipitated water is discharged along the tunnel drainage ditch.

[0065] The exhaust air treatment wet curtain 22 and the regeneration wet curtain 42 are both honeycomb structures to increase the contact area between the solution and the air flow and improve the reaction treatment efficiency.

[0066] The refrigeration heat exchange module 5 includes a compressor 51, a condenser 52, an expansion valve 53 and an evaporator 54, which are connected in series via pipelines in sequence, wherein the condenser 52 is used to release heat, and the evaporator 54 is used to absorb heat for refrigeration.

[0067] The refrigeration and heat exchange module 5 also includes a first solution pump 55, a second solution pump 56, a first heat exchanger 57, and a second heat exchanger 58. The liquid inlet of the first solution pump 55 is connected to the dehumidification solution tank 24 via the first liquid inlet pipeline 71, and the liquid outlet of the first solution pump 55 is respectively connected to the first liquid distribution pipeline 721 and the first liquid exchange pipeline 722, the first liquid distribution pipeline 721 is connected to the first liquid distributor 23, and the first liquid exchange pipeline 722 is connected to the regeneration solution tank 44. The liquid inlet of the second solution pump 56 is connected to the regeneration solution tank 44 via the second liquid inlet pipeline 73, and the liquid outlet of the second solution pump 56 is respectively connected to the second liquid distribution pipeline 741 and the second liquid exchange pipeline 742, the second liquid distribution pipeline 741 is connected to the second liquid distributor 43, and the second liquid exchange pipeline 742 is connected to the dehumidification solution tank 24. The first liquid distribution pipeline 721 flows through the first heat exchanger 57, and the evaporator 54 is arranged on the first heat exchanger 57, and the first liquid distribution pipeline 721 and the evaporator 54 exchange cold and heat. The second liquid distribution pipeline 741 flows through the second heat exchanger 58, and the condenser 52 is arranged on the second heat exchanger 58, and the second liquid distribution pipeline 741 and the condenser 52 exchange cold and heat.

[0068] The first liquid exchange pipeline 722 and the second liquid exchange pipeline 742 both flow through the third heat exchanger 59, and the first liquid exchange pipeline 722 and the second liquid exchange pipeline 742 realize cold and heat exchange. The solution drawn from the dehumidification solution tank 24 is sent to the regeneration solution tank 44 through the first liquid exchange pipeline 722, and the temperature of this part of the solution is relatively low; while the solution drawn from the regeneration solution tank 44 is sent to the dehumidification solution tank 24 through the second liquid exchange pipeline 742, and the temperature of this part of the solution is relatively high. The two parts of the solution are exchanged with cold and heat through the third heat exchanger 59, thereby improving energy utilization and reducing equipment operation energy consumption.

[0069] The exhaust air treatment module 2 and the solution regeneration module 4 are connected via the first liquid exchange pipeline 722 and the second liquid exchange pipeline 742 to ensure that the exhaust air treatment module 2 is at a higher activity and reaction treatment efficiency through the operation of the solution regeneration module 4 .

[0070] The first solution pump 55 is running, and the solution in the dehumidification solution tank 24 is divided into two branches. One branch flows through the first liquid distribution pipeline 721 and passes through the first heat exchanger 57 to exchange cold and heat with the evaporator 54. The temperature of the solution in the first liquid distribution pipeline 721 is reduced and the solution is transported to the first liquid distributor 23. The other branch is connected to the regeneration solution tank 44 through the first liquid exchange pipeline 722 to transport the solution in the dehumidification solution tank 24 to the regeneration solution tank 44. The opening and closing and opening size of the first solenoid valve 83 are controlled by the controller 85 to adjust the amount of solution flowing into the regeneration solution tank 44.

[0071] The second solution pump 56 is running, and the solution in the regeneration solution tank 44 is divided into two branches. One branch flows through the second liquid distribution pipeline 741 through the second heat exchanger 58 to exchange cold and heat with the condenser 52. The temperature of the solution in the second liquid distribution pipeline 741 increases and is transported to the second liquid distributor 43. The other branch is connected to the dehumidification solution tank 24 through the second liquid exchange pipeline 742 to transport the solution in the regeneration solution tank 44 to the dehumidification solution tank 24. The opening, closing and opening size of the second solenoid valve 84 are controlled by the controller 85 to adjust the amount of solution flowing into the dehumidification solution tank 24.

[0072] The concentration of the solution at the exhaust air treatment module 2 decreases after absorbing water vapor in the wind flow, and the concentration of the solution at the solution regeneration module 4 increases after the evaporated water vapor is carried away by the wind flow. The dehumidification solution tank 24 and the regeneration solution tank 44 circulate the solution to adjust the solution at the exhaust air treatment module 2 to be at a higher concentration and the solution at the solution regeneration module 4 to be at a lower concentration.

[0073] The first liquid level gauge 81 is arranged in the dehumidification solution tank 24, and the second liquid level gauge 82 is arranged in the regeneration solution tank 44; the first solenoid valve 83 is arranged on the first liquid exchange pipeline 722; the second solenoid valve 84 is arranged on the second liquid exchange pipeline 742; the controller 85 is respectively connected to the first liquid level gauge 81, the second liquid level gauge 82, the first solenoid valve 83 and the second solenoid valve 84 via signal cables. When the first liquid level gauge 81 in the dehumidification solution tank 24 detects that the liquid level is high, the controller 85 controls and adjusts the first solenoid valve 83 to increase the opening, increase the amount of solution flowing into the regeneration solution tank 44, and reduce the amount of solution flowing into the dehumidification solution tank 24; when the second liquid level gauge 82 in the regeneration solution tank 44 detects that the liquid level is high, the controller 85 controls and adjusts the second solenoid valve 84 to increase the opening, increase the amount of solution flowing into the dehumidification solution tank 24, and reduce the amount of solution flowing into the regeneration solution tank 44.

[0074] The controller 85 is also connected to the compressor 51, the first solution pump 55 and the second solution pump 56 via signal cables, so that the controller 85 controls the operating power of the compressor 51 and the flow rate of the solution pump, thereby adjusting the dehumidification and cooling effect of the equipment.

[0075] The structures of the first liquid distributor 23 and the second liquid distributor 43 are as follows: Figure 7 As shown, one side of the liquid distributor is provided with a solution input port 91 for connecting to the first liquid distribution pipeline 721 or the second liquid distribution pipeline 741, and a plurality of small holes are provided at the bottom of the liquid distributor. The small holes near the solution input port 91 have a smaller aperture and are sparse, while the small holes away from the solution input port 91 have a larger aperture and are dense. Through the liquid distributor, the solution can be made to flow evenly into the exhaust air treatment wet curtain 22 or the regeneration wet curtain 42 below.

[0076] The structures of the first dust collecting tray 25 and the second dust collecting tray 45 are as follows: Figure 8 , Fig. 9 As shown, a first lock buckle 92 is provided on the dust collecting tray, and a second lock buckle 93 is provided on the first bellows 21 and the second bellows 41. A first assembly groove is provided in the first bellows 21, and the first dust collecting tray 25 can be placed in the first assembly groove, and can also be moved out of the first assembly groove to dump the dust in the first dust collecting tray 25; a second assembly groove is provided in the second bellows 41, and the second dust collecting tray 45 can be placed in the second assembly groove, and can also be moved out of the second assembly groove to dump the dust in the second dust collecting tray 45. The first lock buckle 92 and the second lock buckle 93 are detachably connected to facilitate fixing the dust collecting tray and also facilitate removing the dust collecting tray from the assembly groove.

[0077] A method for recycling exhaust air from a tunneling working face, using the exhaust air recycling treatment device for a tunneling working face described above in this embodiment, the method comprises the following steps:

[0078] Step 1: Arrange the exhaust air recycling treatment equipment of the excavation working face at a position close to the excavation working face, connect the first air outlet 12 to the air duct 61 arranged in the excavation tunnel through the transition air duct 62, and the end of the air duct 61 in the excavation tunnel faces the excavation working face;

[0079] Step 2: The end of the wind tube 61 in the tunnel conveys airflow to the tunnel working face, and the exhaust air recycling treatment equipment of the tunnel working face is started, and the exhaust air returning from the tunnel working face enters the first air inlet 11 and the second air inlet 13;

[0080] The exhaust air flow entering from the first air inlet 11 enters the first wind box 21 and contacts the low-temperature concentrated solution on the exhaust air treatment wet curtain 22. The water vapor in the exhaust air flow is transferred to the solution. The dust in the exhaust air flow is adsorbed on the exhaust air treatment wet curtain 22 and is sprayed with solution by the first liquid distributor 23 onto the exhaust air treatment wet curtain 22, and falls to the first dust collecting tray 25. The first liquid distributor 23 sprays the solution onto the exhaust air treatment wet curtain 22 and finally falls to the dehumidification solution box 24. The exhaust air flow is finally transported to the excavation working face through the first air outlet 12, the transition air duct 62 and the air duct 61 in the excavation tunnel.

[0081] The exhaust air flow entering from the second air inlet 13 enters the second wind box 41 and contacts the high-temperature dilute solution on the regeneration wet curtain 42, taking away the water vapor evaporated from the high-temperature dilute solution. The dust in the exhaust air flow is adsorbed on the regeneration wet curtain 42 and is washed by the second liquid distributor 43 spraying the solution on the regeneration wet curtain 42 and falls to the second dust collecting tray 45. The second liquid distributor 43 sprays the solution on the regeneration wet curtain 42 and finally falls to the regeneration solution box 44. The exhaust air flow is finally discharged along the top of the tunnel through the second air outlet 14 and the return air duct 63.

[0082] at the same time,

[0083] The first solution pump 55 delivers the solution in the dehumidification solution tank 24 to the first liquid distributor 23 and the regeneration solution tank 44 , and the second solution pump 56 delivers the solution in the regeneration solution tank 44 to the second liquid distributor 43 and the dehumidification solution tank 24 .

[0084] So far, the present embodiment has been described in detail in conjunction with the accompanying drawings. Based on the above description, those skilled in the art should have a clear understanding of the exhaust air recycling treatment equipment and method for the excavation working face of the present invention. The exhaust air recycling treatment equipment and method for the excavation working face of the present invention can solve the problem of insufficient air volume in the excavation working face, realize the reuse of the exhaust air cooling capacity of the excavation working face, and make the air duct 61 in the excavation tunnel not equipped with existing refrigeration equipment, or even if equipped with existing refrigeration equipment, the existing refrigeration equipment can be operated with low energy consumption, and the local fan 33 equipped with the air duct 61 in the excavation tunnel can also be operated with low energy consumption, so that the overall ventilation and refrigeration system has low energy consumption; at the same time, before the exhaust air is transported to the excavation working face again, the water vapor and dust in the exhaust air flow are first removed, and the temperature is reduced to transport dry, cold and clean air flow to the excavation working face; the solution regeneration module 4 is operated to ensure that the exhaust air treatment module 2 is in a high activity and reaction treatment efficiency, and during the operation of the solution regeneration module 4, the exhaust air is sucked in to remove dust, thereby improving the working environment of the tunnel behind the excavation working face.

[0085] Of course, the specific embodiments described above further illustrate the purpose, technical solutions and beneficial effects of the present invention. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A device for recycling and treating exhaust air from a tunneling working face, characterized in that: include: A base, movable relative to the ground; An exhaust air processing module is arranged on the base, one end of the exhaust air processing module is connected to the first air inlet, and the other end is connected to the first air outlet, and the first air outlet is connected to the air duct arranged in the excavation tunnel through the transition air duct; A first fan, disposed at the first air inlet and / or the first air outlet, for sequentially generating airflow at the first air inlet, the exhaust air processing module and the first air outlet; A solution regeneration module is arranged on the base, one end of the solution regeneration module is connected to the second air inlet, and the other end is connected to the second air outlet, and the second air outlet is connected to the return air duct; A second fan, disposed at the second air inlet and / or the second air outlet, for sequentially generating airflow at the second air inlet, the solution regeneration module and the second air outlet; The refrigeration and heat exchange module is arranged on the base and is used for exchanging cold and heat with the exhaust air treatment module and the solution regeneration module.

2. The exhaust air recycling and processing equipment for the excavation working face according to claim 1 is characterized in that: The exhaust air treatment module includes a first wind box, an exhaust air treatment wet curtain, a first liquid distributor, a dehumidification solution tank and a first dust collection tray; The first wind box is arranged on the base, and opposite ends of the first wind box are respectively connected to a first air inlet and a first air outlet; The exhaust air treatment wet curtain is arranged in the first wind box; The first liquid distributor is arranged in the first wind box and above the exhaust air treatment wet curtain, and the first liquid distributor is used to spray the solution to the exhaust air treatment wet curtain; The dehumidification solution tank is arranged in the first wind box and below the exhaust air treatment wet curtain, and the solution sprayed to the exhaust air treatment wet curtain falls into the dehumidification solution tank; The first dust collecting tray is arranged in the first wind box and between the exhaust air treatment wet curtain and the dehumidification solution box.

3. The exhaust air recycling and processing equipment for the excavation working face according to claim 2 is characterized in that: The air-deficient treatment wet curtain is a honeycomb structure.

4. The exhaust air recycling treatment equipment for the excavation working face according to claim 2 is characterized in that: The solution regeneration module includes a second wind box, a regeneration wet curtain, a second liquid distributor, a regeneration solution tank and a second dust collection tray; The second wind box is arranged on the base, and the opposite two ends of the second wind box are respectively connected to the second air inlet and the second air outlet; The regeneration wet curtain is arranged in the second wind box; The second liquid distributor is arranged in the second wind box and above the regeneration wet curtain, and the second liquid distributor is used to spray solution to the regeneration wet curtain; The regeneration solution tank is arranged in the second wind box and below the regeneration wet curtain, and the solution sprayed to the regeneration wet curtain falls into the regeneration solution tank; The second dust collecting tray is arranged in the second wind box and between the regeneration wet curtain and the regeneration solution tank.

5. The exhaust air recycling and processing equipment for the excavation working face according to claim 4 is characterized in that: The regeneration wet curtain is a honeycomb structure.

6. The exhaust air recycling and processing equipment for the excavation working face according to claim 4 is characterized in that: The refrigeration heat exchange module comprises a compressor, a condenser, an expansion valve and an evaporator, and the compressor, the condenser, the expansion valve and the evaporator are connected in series via pipelines.

7. The exhaust air recycling and processing equipment for the excavation working face according to claim 6 is characterized in that: The refrigeration and heat exchange module also includes a first solution pump, a second solution pump, a first heat exchanger and a second heat exchanger; The liquid inlet of the first solution pump is connected to the dehumidification solution tank via the first liquid inlet pipeline, the liquid outlet of the first solution pump is connected to the first liquid distribution pipeline and the first liquid exchange pipeline respectively, the first liquid distribution pipeline is connected to the first liquid distributor, and the first liquid exchange pipeline is connected to the regeneration solution tank; The liquid inlet of the second solution pump is connected to the regeneration solution tank via the second liquid inlet pipeline, the liquid outlet of the second solution pump is connected to the second liquid distribution pipeline and the second liquid exchange pipeline respectively, the second liquid distribution pipeline is connected to the second liquid distributor, and the second heat exchange pipeline is connected to the dehumidification solution tank; The first liquid distribution pipeline flows through the first heat exchanger, the evaporator is arranged on the first heat exchanger, and the first liquid distribution pipeline and the evaporator realize the exchange of cold and heat; The second liquid distribution pipeline flows through the second heat exchanger, and the condenser is arranged on the second heat exchanger, so that cold and heat exchange is realized between the second liquid distribution pipeline and the condenser.

8. The exhaust air recycling equipment for excavation working face according to claim 7 is characterized in that: It also includes a third heat exchanger, through which both the first liquid exchange pipeline and the second liquid exchange pipeline flow, and cold and heat exchange is achieved between the first liquid exchange pipeline and the second liquid exchange pipeline.

9. The exhaust air recycling and processing equipment for the excavation working face according to claim 7 is characterized in that: It also includes a controller, a first liquid level gauge, a second liquid level gauge, a first solenoid valve and a second solenoid valve; The first liquid level gauge is disposed in the dehumidification solution tank, and the second liquid level gauge is disposed in the regeneration solution tank; A first solenoid valve is provided on the first liquid distribution pipeline and / or the first liquid exchange pipeline; a second solenoid valve is provided on the second liquid distribution pipeline and / or the second liquid exchange pipeline; The controller is connected to the first liquid level meter, the second liquid level meter, the first solenoid valve and the second solenoid valve via signal cables respectively.

10. A method for recycling exhaust air from a tunneling working face, characterized in that: The method using the exhaust air recycling treatment equipment for the excavation working face according to any one of claims 1 to 9 comprises the following steps: Step 1: Arrange the exhaust air recycling treatment equipment of the excavation working face at the position of the excavation working face, connect the first air outlet to the air duct arranged in the excavation tunnel through the transition air duct, and the end of the air duct in the excavation tunnel faces the excavation working face; Step 2, the end of the wind tube in the tunnel conveys airflow to the tunneling working face, and the exhaust air recycling treatment equipment of the tunneling working face is started to allow the exhaust air returning from the tunneling working face to enter the first air inlet and the second air inlet; The exhaust air flow entering from the first air inlet enters the first wind box and contacts the low-temperature concentrated solution on the exhaust air treatment wet curtain. The water vapor in the exhaust air flow is transferred to the solution. The dust in the exhaust air flow is adsorbed on the exhaust air treatment wet curtain and is sprayed with solution by the first liquid distributor to the exhaust air treatment wet curtain and flushed to the first dust collecting tray. The solution sprayed by the first liquid distributor to the exhaust air treatment wet curtain finally falls into the dehumidification solution box. The exhaust air flow is finally transported to the excavation working face through the first air outlet, the transition air duct and the air duct in the excavation tunnel. The exhaust air flow entering from the second air inlet enters the second wind box and contacts the high-temperature dilute solution on the regeneration wet curtain, taking away the water vapor evaporated from the high-temperature dilute solution. The dust in the exhaust air flow is adsorbed on the regeneration wet curtain and is washed by the second liquid distributor spraying solution on the regeneration wet curtain and falls to the second dust collecting tray. The second liquid distributor sprays solution on the regeneration wet curtain and finally falls to the regeneration solution tank. The exhaust air flow is finally discharged through the second air outlet and the return air duct. at the same time, The first solution pump delivers the solution in the dehumidification solution tank to the first liquid distributor and the regeneration solution tank, and the second solution pump delivers the solution in the regeneration solution tank to the second liquid distributor and the dehumidification solution tank.

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