Mining harmful gas treatment method and treatment device

Abstract

The invention provides a mining harmful gas treatment method and device. The mining harmful gas treatment method comprises the steps that air containing harmful gas in a roadway is sucked into the treatment device; the treatment device is used for treating the air containing the harmful gas, and after the harmful gas in the air is decomposed, purified air is obtained; and when the purified air meets the discharge standard under the mine, the purified air is discharged into a roadway. According to the mining harmful gas treatment method, the harmful gas can be treated fundamentally, purified air can meet the emission standard of temperature or harmful gas concentration, the phenomenon that the explosion risk is increased due to the fact that the temperature and the concentration of the harmful gas do not reach the standard is avoided, a complex ventilation system is avoided, and the cost is reduced. The problems of resource waste and the like caused by the adoption of too many fans are avoided, and the technical problem that in the related technology, an existing harmful gas treatment method has large limitation when treating harmful gas in a roadway is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of mining harmful gas treatment, and in particular to a mining harmful gas treatment method and a treatment device. Background Art

[0002] In the process of coal mining, the accumulation of harmful gases such as gas (mainly methane), carbon monoxide, and sulfur dioxide poses a serious threat to the life safety of underground miners and equipment operation. In particular, methane, when its concentration reaches a certain level, may cause an explosion and cause a major safety accident. Therefore, effective management and treatment of these harmful gases is crucial to ensure safe production in coal mines.

[0003] At present, most coal mines use the method of increasing air volume to control the concentration of harmful gases. The specific method is to install a blower in the mine, extract fresh air from the ground and send it into the mine, and dilute the harmful gases by continuously increasing the air volume. Although this method is simple and widely used, it also has significant limitations: ①Difficulty in regional coverage: Due to the complex and widespread distribution of tunnels inside the mine, a large number of pipes and multiple blowers need to be arranged to relay air supply to ensure that harmful gases in every corner can be effectively diluted. This not only increases the complexity and cost of the system, but may also lead to a decrease in air volume and insufficient local ventilation.

[0004] ②Energy consumption and low efficiency: In order to maintain sufficient air volume, multiple high-power blowers must be continuously operated in relay, resulting in high energy consumption. In addition, the transmission of fresh air by multiple blowers will inevitably cause loss of air volume. Even if multiple high-power blowers are added to increase the air volume, it is difficult to accurately control the gas concentration in a specific area, which limits the overall treatment effect.

[0005] ③ Reliability issues: Failure of the blower or pipe interface will directly affect the normal operation of the ventilation system. Once a shutdown or leakage occurs, high concentrations of harmful gases may quickly accumulate, endangering the lives of miners.

[0006] Therefore, although the existing ventilation dilution method can temporarily reduce the concentration of harmful gases, it cannot fundamentally solve the problem. The existing harmful gas treatment method has great limitations when treating harmful gases in tunnels, and a more direct and effective treatment technology is urgently needed.

[0007] Therefore, the prior art needs to be further developed. Summary of the invention

[0008] The purpose of the present invention is to overcome the above technical deficiencies and provide a method and device for treating harmful gases in mines, so as to solve the technical problem that the existing harmful gas treatment methods in the relevant technology have great limitations when treating harmful gases in tunnels.

[0009] In order to achieve the above technical objectives, the present invention adopts the following technical solutions: a method for treating harmful gases in mining is provided, comprising: The air containing harmful gases in the tunnel is sucked into the treatment device; The treatment device treats the air containing harmful gases, decomposes the harmful gases in the air, and obtains purified air; When the purified air meets the underground mine emission standards, the purified air will be discharged into the tunnel.

[0010] Furthermore, the processing device processes the air containing harmful gases, including: The air containing harmful gases is sent into a heating chamber in the treatment device for heating, so that the air containing harmful gases is preheated; The preheated air containing harmful gases is sent to the catalytic combustion chamber in the treatment device, so that the harmful gases are mixed with the catalyst and then burned and decomposed to obtain purified air.

[0011] Furthermore, the air containing harmful gases is sent into a heating chamber in the treatment device for heating, so that the air containing harmful gases is preheated, and the process includes: It is detected whether the temperature of the preheated gas reaches a preheating temperature threshold. If the preheating temperature threshold is reached, the preheated gas is discharged from the heating chamber to the catalytic combustion chamber.

[0012] Furthermore, the preheated air containing harmful gases is sent to the catalytic combustion chamber in the treatment device, and the harmful gases are mixed with the catalyst and then burned and decomposed to obtain purified air, which includes: The purified air is tested to obtain the concentration of harmful gases therein, and it is determined whether the purified air can be discharged from the catalytic combustion chamber based on the concentration of harmful gases. If the purified air cannot be discharged from the catalytic combustion chamber, the air in the catalytic combustion chamber continues to be catalytically combusted.

[0013] Furthermore, before the air containing harmful gases in the tunnel is sucked into the treatment device, the method further includes: Detect the harmful gas concentration and oxygen concentration in the tunnel, and judge whether the current tunnel environment meets the gas treatment conditions based on the harmful gas concentration and oxygen concentration. If the gas treatment conditions are met, control the air intake fan to suck the air containing harmful gases into the treatment device.

[0014] Further, judging whether the current tunnel environment meets the gas treatment conditions according to the harmful gas concentration and the oxygen concentration includes: The concentration of harmful gases in the tunnel is compared with the harmful gas concentration alarm threshold. If the concentration of harmful gases in the tunnel exceeds the harmful gas concentration alarm threshold, the oxygen concentration in the tunnel is compared with the oxygen concentration threshold. If the oxygen concentration in the tunnel exceeds the oxygen threshold, the current tunnel environment meets the gas treatment conditions.

[0015] Furthermore, if the gas treatment conditions are met, the air intake fan is controlled to suck the air containing harmful gases into the treatment device, specifically: If the current tunnel environment meets the gas treatment conditions, the air intake fan is controlled to open, and the power of the air intake fan is adjusted according to the concentration of harmful gases to suck the air containing harmful gases into the treatment device.

[0016] Further, including: A portion of the purified air discharged from the catalytic combustion chamber is diverted to the heating chamber, the diverted purified gas is mixed with the air containing harmful gases to be heated, and the mixed gas is sent to the heating chamber for heating.

[0017] Furthermore, when the purified air meets the underground mine emission standards, the purified air is discharged into the tunnel, including: The purified gas is sent to a cooling chamber of the processing device to cool the purified gas; Before the cooled gas is discharged from the cooling chamber, the temperature of the cooled gas is detected; It is determined whether the temperature of the cooled gas meets the first underground discharge standard. If the temperature of the cooled gas meets the first underground discharge standard, the cooled gas is discharged from the cooling chamber.

[0018] Furthermore, when the purified air meets the underground mine emission standards, the purified air is discharged into the tunnel, including: After the cooled gas is discharged from the cooling chamber, the gas to be discharged is sampled to obtain the concentration of harmful gases in the gas to be discharged, and it is determined whether the gas to be discharged meets the second underground mine emission standard. If the gas to be discharged meets the second underground mine emission standard, the gas to be discharged is discharged into the tunnel.

[0019] A mine-used harmful gas treatment device adopts the mine-used harmful gas treatment method to achieve harmful gas treatment. Beneficial effects: 1. In the mine harmful gas treatment method of the present embodiment, the air containing harmful gases in the tunnel is sucked into the treatment device for treatment, so that the harmful gases are decomposed in the treatment device, and the harmful gases are decomposed into non-toxic and harmless components, thereby obtaining purified air. After the purified air meets the underground mine emission standard, the purified air is discharged into the tunnel. In this way, the harmful gases can be fundamentally treated, and the purified air can meet the emission standards of temperature or harmful gas concentration, avoiding the increase of explosion risk due to the failure of harmful gas temperature and concentration to meet the standards, avoiding the use of complex ventilation systems, avoiding the waste of resources caused by the use of too many fans, and solving the technical problems that the existing harmful gas treatment methods in the related art have great limitations in treating harmful gases in tunnels.

[0020] 2. When the concentration of harmful gases in the tunnel exceeds the alarm threshold of harmful gas concentration, it means that the concentration of harmful gases in the tunnel is too high and it is necessary to start treating the harmful gases and then detect the oxygen concentration. If the oxygen concentration in the tunnel exceeds the oxygen threshold, it means that the oxygen concentration is relatively high and the air in the tunnel can be treated. If the oxygen concentration is too low, although the concentration of harmful gases reaches the treatment standard, the treatment device will not start to treat the air in the tunnel to avoid excessive consumption of oxygen during the decomposition of harmful gases, which will cause the oxygen concentration in the tunnel to be too low and cause the risk of hypoxia for the workers in the tunnel.

[0021] 3. A certain proportion of the high-temperature air discharged from the catalytic combustion chamber is diverted to the heating chamber and mixed with the air to be heated, thereby increasing the temperature of the air to be heated and recovering the waste heat of the purified air, which can increase the heating speed of the air in the heating chamber. In addition, the diverted air can be purified again to improve the treatment efficiency of harmful gases.

[0022] 4. Discharge the gas into the gas cooling and fire extinguishing treatment device to make the gas fall into the aqueous solution to achieve the purpose of cooling and extinguishing sparks. Set up a cooling chamber to cool the high-temperature air after combustion to avoid the purified air being too hot when discharged into the tunnel, which increases the risk of explosion. After cooling the air, perform temperature detection on the cooled gas again to ensure that the temperature of the air to be discharged meets the standard and meets the first underground mine emission standard. If the air temperature is still too high, continue to cool it in the cooling chamber until the temperature reaches the standard and is discharged from the cooling chamber. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a flow chart of a method for treating harmful mining gases adopted in an embodiment of the present invention; Figure 2It is a simplified structural diagram of a mining harmful gas treatment device used in an embodiment of the present invention.

[0024] The above drawings include the following reference numerals: 1. Detection component; 2. Signal processing component; 3. Intake fan; 4. Heating chamber; 5. Catalytic combustion chamber; 6. Exhaust fan; 7. Cooling chamber. DETAILED DESCRIPTION

[0025] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present application.

[0026] As described in the background technology, the existing harmful gas treatment methods have technical problems with large limitations when treating harmful gases in tunnels, but most coal mines still use ventilation dilution methods. The reason is that coal mine tunnels are usually closed or semi-closed spaces. In the coal mine environment, any activities that may produce sparks or high temperatures must be treated with caution to avoid causing methane explosions. Therefore, the method of decomposing harmful gases by burning in coal mines has a high safety risk. Directly decomposing harmful gases must take into account the explosion risks of combustible gases such as methane and coal dust. Strict safety measures and technical means are needed to prevent the occurrence of explosion accidents and protect the lives of miners and the integrity of mine facilities. Therefore, the common method of heating or burning harmful gases in coal mine tunnels needs to overcome many technical difficulties.

[0027] According to an embodiment of the present invention, a method for treating harmful gases in a mine is provided. Figure 1 to Figure 2 ,include: S110: The air containing harmful gases in the tunnel is sucked into the treatment device; S120: The processing device processes the air containing harmful gases, decomposes the harmful gases in the air, and obtains purified air; S130: When the purified air meets the underground mine emission standards, the purified air is discharged into the tunnel.

[0028] In this way, by adopting the processing device and processing method in this embodiment, the air containing harmful gases in the tunnel is sucked into the processing device for processing, so that the harmful gases are decomposed in the processing device, and the harmful gases are decomposed into non-toxic and harmless components, thereby obtaining purified air. After the purified air meets the underground mine emission standards, the purified air is discharged into the tunnel. In this way, the harmful gases can be fundamentally treated, and the purified air can meet the emission standards of temperature or harmful gas concentration, avoiding the increase in explosion risk due to the failure of harmful gas temperature and concentration to meet the standards, avoiding the use of complex ventilation systems, avoiding the waste of resources caused by the use of too many fans, and solving the technical problems that the existing harmful gas treatment methods in the relevant technology have great limitations when treating harmful gases in tunnels.

[0029] In the mining harmful gas treatment method of this embodiment, the treatment device treats the air containing the harmful gas, including: S121: sending the air containing harmful gases into the heating chamber 4 in the processing device for heating, so that the air containing harmful gases is preheated; S122: The preheated air containing harmful gases is sent to the catalytic combustion chamber 5 in the treatment device, so that the harmful gases are mixed with the catalyst and then burned and decomposed to obtain purified air.

[0030] Specifically, the heating chamber 4 utilizes the resistance wire heating principle to heat the air delivered from the air intake fan 3. The purpose of heating is to carry out a catalytic oxidation reaction in the next step. After high-temperature treatment, some harmful gases can undergo an oxidation reaction, such as carbon monoxide, methane, ethylene, hydrogen sulfide, etc., which are oxidized into carbon dioxide, etc. through high-temperature oxidation; the preferred heating temperature is greater than 300°C.

[0031] In some embodiments, the heating area in the heating chamber 4 is adjustable. The heating chamber 4 adopts a zoning design, which is divided into low temperature, medium temperature and high temperature. It is intelligently adjusted according to the amount of inhaled gas to reduce energy loss and improve efficiency.

[0032] In some embodiments, the heating chamber 4 uses a flameproof shell with added insulation material inside and good sealing performance to reduce the temperature loss of the heating chamber 4. The electric heating tube uses corrugated stainless steel strips or galvanized plates, and has a high heating efficiency.

[0033] Specifically, for some harmful gases that cannot be oxidized at high temperature in the previous step, or gases that are not sufficiently treated, they still need to be catalytically combusted in the catalytic combustion chamber 5. The high-temperature heated gas reacts with the precious metal coatings such as platinum (Pt), rhodium (Rh) and palladium (Pd) coated on the mesh structure in the catalytic combustion chamber 5 to completely oxidize and catalytically combust the harmful gases. In some embodiments, precious metals such as platinum (Pt), rhodium (E) and palladium (Pd) are coated on a mesh structure as catalysts, and the catalytic combustion chamber 5 is layered and zoned, and a small electric fan is provided to achieve multiple reciprocating cycles of airflow to ensure its full combustion. The air in the catalytic combustion chamber 5 is repeatedly heated, catalytically oxidized and burned, and then discharged, thereby ensuring that harmful gases are completely decomposed.

[0034] First, the air is heated by the heating chamber 4 to rapidly increase the temperature of the air, thereby improving the decomposition efficiency of harmful gases during subsequent catalytic combustion; by setting up a catalytic combustion chamber, the harmful gases are completely decomposed into non-toxic and harmless components after catalytic combustion, thereby purifying the air.

[0035] In the mining harmful gas treatment method of this embodiment, the air containing harmful gas is sent into the heating chamber 4 in the treatment device for heating. After the air containing harmful gas is preheated, the following steps are included: S1211: Detect whether the temperature of the preheated gas reaches the preheating temperature threshold. If it reaches the preheating temperature threshold, the preheated gas is discharged from the heating chamber 4 to the catalytic combustion chamber 5.

[0036] Specifically, a temperature sensor is provided at the gas outlet of the heating chamber 4. Only after complete heating and when the temperature is greater than 300°C, the sensor controls the gas outlet switch to release the heated gas into the next process flow. Unqualified gas is prohibited from being released until the temperature reaches the standard. Only when the temperature reaches the standard can it be discharged into the catalytic combustion chamber 5 to avoid the low temperature of the preheated air, which affects the decomposition efficiency in the catalytic combustion chamber.

[0037] In the mining harmful gas treatment method of this embodiment, the preheated air containing harmful gas is sent to the catalytic combustion chamber 5 in the treatment device, and the harmful gas is mixed with the catalyst and then burned and decomposed to obtain purified air, which includes: S1221: Detect the purified air to obtain the concentration of harmful gases therein, and determine whether the purified air can be discharged from the catalytic combustion chamber 5 based on the concentration of harmful gases. If the purified air cannot be discharged from the catalytic combustion chamber 5, continue to catalytically combust the air in the catalytic combustion chamber 5.

[0038] In this way, a harmful gas monitoring device is set at the outlet of the catalytic combustion chamber 5, and a harmful gas concentration emission threshold is set. Only when the requirements are met can the burned gas be released through the outlet to enter the next link. If not, the catalytic oxidation combustion reaction needs to be repeated to ensure that the harmful gas concentration in the air is fully met before being discharged.

[0039] In some embodiments, the heating chamber 4 and the catalytic combustion chamber 5 can be combined into the same component, so that heating and catalytic oxidation of harmful gases can be achieved simultaneously in one component.

[0040] It is understandable that the heating chamber 4 and the catalytic combustion chamber 5 need to adopt explosion-proof shells to prevent the combustion or explosion from being transmitted to the outside of the processing device when combustion or explosion occurs inside the heating chamber 4 and the catalytic combustion chamber 5, thereby causing the risk of explosion in the tunnel. A set of automatic fire extinguishing devices can be arranged outside the heating chamber 4 and the catalytic combustion chamber 5, which can automatically extinguish the fire by sensing temperature or can be manually pressed.

[0041] In some embodiments, the processing device includes an exhaust fan 6, which adopts an intelligent suction and exhaust motor. The exhaust fan 6 controls the exhaust speed according to the gas speed and volume discharged from the catalytic combustion chamber 5. By using this device, the gas purified by the catalytic combustion chamber 5 can be intelligently sucked and discharged, and the wind pressure can be increased to facilitate the catalytic combustion chamber 5 to enter the cooling chamber 7, so that the purified gas can smoothly pass through the cooling liquid in the cooling chamber 7 and then be discharged into the tunnel.

[0042] In the mining harmful gas treatment method of this embodiment, the following further includes: before the air containing harmful gas enters the heating chamber 4, the air containing harmful gas and the treated gas discharged from the catalytic combustion chamber 5 are heat exchanged with each other through a heat exchange device to preheat the air containing harmful gas. In this way, the high-temperature residual heat of the exhaust pipe and the low-temperature gas of the air inlet pipe are fully heat exchanged, the initial temperature of the air entering the heating chamber 4 is increased, and thus the heating speed of the air in the heating chamber 4 is increased.

[0043] In some embodiments, an exhaust duct may be provided in the air inlet duct so that the air to be heated in the air inlet duct and the high-temperature purified air in the exhaust duct can exchange heat with each other; or, an air inlet duct may be provided in the exhaust duct so that the air to be heated in the air inlet duct and the high-temperature purified air in the exhaust duct can exchange heat with each other.

[0044] In the mining harmful gas treatment method of this embodiment, before the air containing harmful gas in the tunnel is sucked into the treatment device, it also includes: S100: Detect the harmful gas concentration and oxygen concentration in the tunnel, and determine whether the current tunnel environment meets the gas treatment conditions based on the harmful gas concentration and oxygen concentration. If the gas treatment conditions are met, control the air intake fan 3 to suck the air containing harmful gases into the treatment device.

[0045] In this way, the harmful gas will be processed only when the concentration of the harmful gas and the concentration of oxygen meet the gas processing conditions; by adopting the air intake fan 3, the intake speed of the harmful gas into the processing device is increased.

[0046] In the mining harmful gas treatment method of this embodiment, judging whether the current tunnel environment meets the gas treatment conditions according to the harmful gas concentration and the oxygen concentration includes: S101: Compare the concentration of harmful gases in the tunnel with the harmful gas concentration alarm threshold. If the concentration of harmful gases in the tunnel exceeds the harmful gas concentration alarm threshold, compare the oxygen concentration in the tunnel with the oxygen concentration threshold. S102: If the oxygen concentration in the tunnel exceeds the oxygen threshold, the current tunnel environment meets the gas processing conditions.

[0047] Specifically, the processing device includes a detection component 1, which monitors the content of harmful gases, such as sulfur dioxide, carbon monoxide, hydrogen sulfide, methane and other toxic and harmful gases. By setting an alarm value for the detection component 1, when the concentration of the harmful gas exceeds the standard, the detection component 1 can issue an alarm and transmit the alarm signal to the signal processing component 2, which converts the gas concentration into an electrical signal for transmission.

[0048] Specifically, the detection component 1 is configured to only alarm when harmful gas appears when the oxygen concentration is low, but not transmit a processing signal.

[0049] In this way, when the concentration of harmful gases in the tunnel exceeds the harmful gas concentration alarm threshold, it means that the concentration of harmful gases in the tunnel is too high and it is necessary to start treating the harmful gases. Then the oxygen concentration is detected. If the oxygen concentration in the tunnel exceeds the oxygen threshold, it means that the oxygen concentration is relatively high. At this time, the air in the tunnel can be treated. If the oxygen concentration is too low, although the concentration of harmful gases reaches the treatment standard, the treatment device will not start to treat the air in the tunnel to avoid consuming too much oxygen during the decomposition process of harmful gases, which will cause the oxygen concentration in the tunnel to be too low, resulting in the risk of hypoxia for the workers in the tunnel.

[0050] In the mining harmful gas treatment method of this embodiment, if the gas treatment conditions are met, the air intake fan 3 is controlled to suck the air containing harmful gas into the treatment device, specifically: S103: If the current tunnel environment meets the gas processing conditions, the air intake fan 3 is controlled to turn on, and the power of the air intake fan 3 is adjusted according to the concentration of the harmful gas to suck the air containing the harmful gas into the processing device.

[0051] Specifically, the processing device includes a signal processing component 2, which is respectively connected to the detection component 1 and the intake fan 3 by signal. The signal processing component 2 processes the signal transmitted by the detection component 1. The signal processing component 2 decides whether to start the intake fan 3 or adjust the power of the intake fan 3 based on different signals. If the concentration of harmful gases is low, the power of the intake fan 3 is reduced. If the concentration of harmful gases is high, the power of the intake fan 3 is increased. In this way, the most appropriate power can be used to control the intake fan 3 according to the concentration of harmful gases, thereby avoiding energy waste.

[0052] In some embodiments, the signal processing component 2 can manually or online set the threshold for starting the air intake fan 3, can be adjusted intelligently, can record the real-time working status of the air intake fan 3, and upload it to the terminal for easy viewing.

[0053] In some embodiments, the processing device is provided with a manual switch, and when the signal processing component 2 fails, the air intake fan 3 can be directly turned on manually.

[0054] The method for treating harmful gas in mining of this embodiment includes: S123: A portion of the purified air discharged from the catalytic combustion chamber 5 is diverted to the heating chamber 4, the diverted purified gas is mixed with the air containing harmful gases to be heated, and the mixed gas is sent to the heating chamber 4 for heating.

[0055] In this way, a certain proportion of the high-temperature air discharged from the catalytic combustion chamber 5 is diverted to the heating chamber 4 and mixed with the air to be heated, thereby increasing the temperature of the air to be heated and recovering the waste heat of the purified air, thereby increasing the heating rate of the air in the heating chamber. In addition, the diverted air can be purified again to improve the treatment efficiency of harmful gases.

[0056] In the method for treating harmful gas in a mine of this embodiment, when the purified air meets the underground mine emission standard, the purified air is discharged into the tunnel, including: S131: sending the purified gas into the cooling chamber 7 of the processing device to cool the purified gas; S132: Before the cooled gas is discharged from the cooling chamber 7, the temperature of the cooled gas is detected; S133: Determine whether the temperature of the cooled gas meets the first underground discharge standard. If the temperature of the cooled gas meets the first underground discharge standard, the cooled gas is discharged from the cooling chamber 7.

[0057] It should be noted that the gas after the catalytic oxidation combustion treatment in the previous step has a high temperature, generally greater than 150°C, and is accompanied by flammable and explosive gases such as sparks, so it needs to be cooled and extinguished.

[0058] Specifically, an exhaust fire barrier is provided in the cooling chamber 7 to prevent sparks from entering the tunnel atmosphere. A temperature sensor is provided at the outlet. If the gas temperature is higher than the required temperature, it is necessary to circulate the temperature until the emission standard is met.

[0059] In this way, the gas is discharged into the gas cooling and fire extinguishing treatment device, and the gas is made to fall into the aqueous solution, so as to achieve the purpose of cooling and extinguishing sparks. The high-temperature air after combustion is cooled by setting up the cooling chamber 7 to avoid the purified air from being too hot when discharged into the tunnel, which increases the risk of explosion. After the air is cooled, the temperature of the cooled gas is detected again to ensure that the temperature of the air to be discharged meets the standard and meets the first underground mine emission standard. If the air temperature is still too high, continue to cool it in the cooling chamber 7 until the temperature meets the standard and is discharged from the cooling chamber 7.

[0060] In the method for treating harmful gas in a mine of this embodiment, when the purified air meets the underground mine emission standard, the purified air is discharged into the tunnel, including: S134: After the cooled gas is discharged from the cooling chamber 7, the gas to be discharged is sampled to obtain the concentration of harmful gases in the gas to be discharged, and it is determined whether the gas to be discharged meets the second underground mine emission standard. If the gas to be discharged meets the second underground mine emission standard, the gas to be discharged is discharged into the tunnel.

[0061] In this way, after the cooled air is discharged from the cooling chamber 7, before it is discharged from the treatment device, the concentration of harmful gases in the cooled air is sampled again to verify the effect of the harmful gas treatment and ensure that the concentration of harmful gases in the discharged air meets the standard. If the concentration of harmful gases still exceeds the standard, the harmful gases to be discharged will be re-processed by catalytic combustion to ensure that all purified air fully meets the underground mine emission standards before being discharged.

[0062] In the mining harmful gas treatment device of this embodiment, see Figure 2 The mining harmful gas treatment device adopts the above-mentioned mining harmful gas treatment method to achieve harmful gas treatment.

[0063] In the mining harmful gas treatment method of this embodiment, the working process is as follows: The harmful gas concentration and oxygen concentration in the tunnel are detected by the detection component 1. When the gas concentration exceeds the standard, the detection component 1 alarms, and when the oxygen concentration reaches the standard, the intake fan 3 is controlled to open, and the power of the intake fan 3 is adjusted according to the control signal transmitted by the signal processing component 2. The intake fan 3 sucks the air containing the harmful gas into the processing device, and the air containing the harmful gas is sent to the heating chamber 4 in the processing device for heating, so that the air containing the harmful gas is preheated, and the preheated air containing the harmful gas is sent to the catalytic combustion chamber 5 in the processing device, so that the harmful gas is mixed with the catalyst and then burned and decomposed, and then the burned air is sent to the cooling chamber 7 through the exhaust fan 6 for cooling and fire extinguishing. The cooled air is detected again. If the concentration of the harmful gas in the gas to be discharged reaches the standard, the gas to be discharged is discharged into the tunnel.

[0064] Specifically, the mining harmful gas treatment device in this embodiment includes: Detection component 1, detection component 1 is used to monitor the content of harmful gases, such as sulfur dioxide, carbon monoxide, hydrogen sulfide, methane and other toxic and harmful gases. By setting an alarm value for the detection component 1, when the concentration of the harmful gas exceeds the standard, the detection component 1 can issue an alarm and transmit the alarm signal to the signal processing component 2, which converts the gas concentration into an electrical signal for transmission; The signal processing component 2 is connected to the detection component 1 and the air intake fan 3 respectively. The signal processing component 2 processes the signal transmitted by the detection component 1. The signal processing component 2 determines whether to start the air intake fan 3 or adjust the power of the air intake fan 3 according to different signals. An air intake fan 3, which sucks harmful gases in the tunnel into the processing device according to the control signal of the signal processing component 2; The heating chamber 4 is used to heat the air containing harmful gases. The air sent from the air intake fan 3 is heated by the resistance wire heating principle. The heating temperature is greater than 300°C. The heating chamber 4 adopts a flameproof shell, and the internal insulation material is added to have good sealing performance and reduce temperature loss. The electric heating tube adopts a corrugated stainless steel belt or a galvanized sheet to improve the heating efficiency; The catalytic combustion chamber 5 is coated with precious metals such as platinum (Pt), rhodium (Rh) and palladium (Pd) as catalysts to catalyze the oxidation reaction of harmful gases. The catalytic combustion chamber 5 is divided into layers and zones, and a small electric fan is set to achieve multiple reciprocating cycles of airflow to ensure full combustion. The exhaust fan 6 is arranged between the catalytic combustion chamber 5 and the cooling chamber 7 to absorb and discharge the treated gas, increase the wind pressure of the air flow, and facilitate the gas to enter the next step; The cooling chamber 7 contains a water solution for cooling. The high-temperature air at the exhaust fan 6 is cooled by the water solution and then discharged out of the treatment device.

[0065] In this way, by adopting the mining harmful gas treatment device in this embodiment, the air containing harmful gases in the tunnel is sucked into the treatment device for treatment through the air intake fan 3, so that the harmful gases are decomposed in the heating chamber 4 and the catalytic combustion chamber 5, and the harmful gases are decomposed into non-toxic and harmless components, thereby obtaining purified air. After the purified air meets the underground mine emission standards, the purified air is discharged into the tunnel. In this way, the harmful gases can be fundamentally treated, and the purified air can meet the emission standards of temperature or harmful gas concentration, avoiding the increase of explosion risk due to the failure of harmful gas temperature and concentration to meet the standards, avoiding the use of complex ventilation systems, avoiding the waste of resources caused by the use of too many fans, and solving the technical problems that the existing harmful gas treatment methods in the relevant technology have great limitations in treating harmful gases in tunnels.

[0066] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0067] Optionally, the specific examples in this embodiment may refer to the examples described in the above embodiments, and this embodiment will not be described in detail here.

[0068] The serial numbers of the above-mentioned embodiments of the present application are for description only and do not represent the advantages or disadvantages of the embodiments.

[0069] In the above embodiments of the present application, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, please refer to the relevant description of other embodiments.

[0070] The above is only a preferred implementation of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present application. These improvements and modifications should also be regarded as the scope of protection of the present application.

Claims

1. A method for treating harmful gases in mining, characterized in that: include: The air containing harmful gases in the tunnel is sucked into the treatment device; The processing device processes the air containing harmful gases, decomposes the harmful gases in the air, and obtains purified air; When the purified air meets the underground mine emission standards, the purified air will be discharged into the tunnel.

2. The method for treating harmful gas in mining according to claim 1, characterized in that: The processing device processes the air containing harmful gases, including: The air containing the harmful gas is sent into a heating chamber (4) in the processing device for heating, so that the air containing the harmful gas is preheated; The preheated air containing harmful gases is sent into the catalytic combustion chamber (5) in the treatment device, so that the harmful gases are mixed with the catalyst and then burned and decomposed to obtain purified air.

3. The method for treating harmful gas in mining according to claim 2, characterized in that: The air containing harmful gases is sent into the heating chamber (4) in the processing device for heating, so that the air containing harmful gases is preheated, and the process includes: It is detected whether the temperature of the preheated gas reaches a preheating temperature threshold, and if it reaches the preheating temperature threshold, the preheated gas is discharged from the heating chamber (4) to the catalytic combustion chamber (5).

4. The method for treating harmful gas in mining according to claim 2, characterized in that: The method comprises: sending the preheated air containing harmful gases into the catalytic combustion chamber (5) in the treatment device, causing the harmful gases to mix with the catalyst and then be burned and decomposed to obtain purified air; The purified air is tested to obtain the concentration of harmful gases therein, and it is determined whether the purified air can be discharged from the catalytic combustion chamber (5) based on the concentration of harmful gases; if the purified air cannot be discharged from the catalytic combustion chamber (5), the air in the catalytic combustion chamber (5) continues to be catalytically combusted.

5. The method for treating harmful gas in mining according to claim 1, characterized in that: Before the air containing harmful gases in the tunnel is sucked into the treatment device, the method further includes: The harmful gas concentration and oxygen concentration in the tunnel are detected, and whether the current tunnel environment meets the gas treatment conditions is determined based on the harmful gas concentration and oxygen concentration. If the gas treatment conditions are met, the air intake fan (3) is controlled to suck the air containing the harmful gas into the treatment device.

6. The method for treating harmful gas in mining according to claim 5, characterized in that: The method of judging whether the current tunnel environment meets the gas treatment conditions according to the harmful gas concentration and the oxygen concentration includes: The concentration of harmful gases in the tunnel is compared with the harmful gas concentration alarm threshold. If the concentration of harmful gases in the tunnel exceeds the harmful gas concentration alarm threshold, the oxygen concentration in the tunnel is compared with the oxygen concentration threshold. If the oxygen concentration in the tunnel exceeds the oxygen threshold, the current tunnel environment meets the gas treatment conditions.

7. The method for treating harmful gas in mining according to claim 5, characterized in that: If the gas treatment conditions are met, the air intake fan (3) is controlled to suck the air containing harmful gases into the treatment device, specifically: If the current tunnel environment meets the gas processing conditions, the air intake fan (3) is controlled to be turned on, and the power of the air intake fan (3) is adjusted according to the concentration of the harmful gas to suck the air containing the harmful gas into the processing device.

8. The method for treating harmful gas in mining according to claim 2, characterized in that: include: A portion of the purified air discharged from the catalytic combustion chamber (5) is diverted to the heating chamber (4), the diverted purified gas is mixed with the air containing harmful gases to be heated, and the mixed gas is sent to the heating chamber (4) for heating.

9. The method for treating harmful gas in mining according to claim 1, characterized in that: When the purified air meets the underground mine emission standards, the purified air is discharged into the tunnel, including: The purified gas is sent into a cooling chamber (7) of the processing device to cool the purified gas; Before the cooled gas is discharged from the cooling chamber (7), the temperature of the cooled gas is detected; It is determined whether the temperature of the cooled gas meets the first underground discharge standard. If the temperature of the cooled gas meets the first underground discharge standard, the cooled gas is discharged from the cooling chamber (7).

10. The method for treating harmful gas in mining according to claim 9, characterized in that: When the purified air meets the underground mine emission standards, the purified air is discharged into the tunnel, including: After the cooled gas is discharged from the cooling chamber (7), the gas to be discharged is sampled to obtain the concentration of harmful gases in the gas to be discharged, and it is determined whether the gas to be discharged meets the second underground mine emission standard. If the gas to be discharged meets the second underground mine emission standard, the gas to be discharged is discharged into the tunnel.

11. A harmful gas treatment device for mining, characterized in that: The mine-used harmful gas treatment device adopts the mine-used harmful gas treatment method described in any one of claims 1 to 10 to achieve harmful gas treatment.

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