Molecular sieve adsorption inhibition system for harmful tail gas of mining diesel locomotive

Abstract

The invention discloses a molecular sieve adsorption inhibition system for harmful tail gas of a mining diesel locomotive. According to the system, synchronous treatment of multiple pollutants is achieved through the synergistic effect of the 5-angstrom zeolite molecular sieve and water. The 5-angstrom molecular sieve is accurately matched with the molecular sizes of harmful gases such as CO and NO by virtue of the specific aperture of 0.5-0.57 nm, and the gases are effectively captured through physical adsorption; and the water medium transfers particulate matters generated by incomplete combustion of diesel oil in the tail gas from a gas phase to a liquid phase through a gravity settling effect, so that the concentration of suspended matters is reduced. A countercurrent plate in the box body is designed to prevent liquid from flowing backwards during shutdown, a multi-stage filtering structure of an exhaust port further ensures the gas-liquid separation effect, a complete adsorption-sedimentation-discharge treatment chain is formed, and the problem that gaseous pollutants and particulate pollutants cannot be considered in the traditional technology is solved from the mechanism.

Description

Technical Field

[0001] The invention belongs to the technical field of diesel exhaust treatment, and in particular relates to a molecular sieve adsorption and suppression system for harmful exhaust gas of a mining diesel locomotive. Background Art

[0002] The exhaust gas emitted by mining diesel locomotives mainly contains CO, NO, NOX and particulate matter. Among them, CO can easily combine with hemoglobin in the human body, causing hypoxia in the human body; NO can change hemoglobin in the blood into denatured hemoglobin, inhibiting the central nervous system, and it is also easy to react with O2 in the air to generate NO2, which can easily cause coughing, asthma, and even pulmonary edema; NOX combines with water to generate nitrous acid and nitric acid, which are corrosive to a certain extent; particulate matter is produced by incomplete combustion of diesel, which can easily cause dizziness and nausea after inhalation.

[0003] However, there is currently no effective way to treat harmful exhaust gas from mining diesel locomotives, especially those used in underground mines, which has caused great harm to human health. Summary of the invention

[0004] The purpose of the present invention is to provide a molecular sieve adsorption and suppression system for harmful exhaust gas from a mining diesel locomotive in order to solve the above-mentioned problems.

[0005] The technical solution adopted by the present invention is as follows: a molecular sieve adsorption and suppression system for harmful exhaust gas of a mining diesel locomotive, the system comprising a box, an exhaust gas discharge cylinder, a countercurrent plate, an exhaust port, a liquid filling port, an adsorbent and a cleaning discharge port; The exhaust gas discharge cylinder is connected to the box body as an inlet, and the exhaust gas enters the box body through it; The counterflow plate is located near the exhaust gas inlet in the box to prevent the liquid from flowing back to the exhaust gas discharge cylinder; The liquid filling port is arranged on the upper part or the side of the box body, and is used to inject the adsorbent mixed with water and 5 angstrom zeolite powder; The adsorbent mixes with the exhaust gas in the box to adsorb CO, NO, and NO x And settle the particles; the purified gas is discharged from the top or end of the box through the exhaust port; The cleaning drain is located at the bottom of the box for regular cleaning of residues. Each component forms a closed process through the box.

[0006] In a preferred embodiment, the box is made of corrosion-resistant metal material, and the interior is designed as a closed cavity space for carrying the entire exhaust gas treatment process. The top of the box is provided with an exhaust port and a liquid filling port, the bottom is provided with a cleaning discharge port, and the side wall is connected to the exhaust gas discharge cylinder. The gas flow path and the adsorption area are separated by a countercurrent plate inside the box to ensure that the exhaust gas is fully in contact with the adsorbent.

[0007] In a preferred embodiment, the exhaust gas discharge tube is made of stainless steel, and the exhaust gas discharge tube is connected to the exhaust pipe of the mining diesel locomotive and the box body through a flange. The interior of the exhaust gas discharge tube is designed as a straight-through pipeline, which guides the high-temperature exhaust gas into the adsorption area of ​​the box body in a turbulent form. The inner wall of the exhaust gas discharge tube is coated with a high-temperature resistant ceramic coating, and the end of the exhaust gas discharge tube extends below the liquid level of the box body to ensure that the exhaust gas needs to penetrate the adsorbent mixed liquid layer.

[0008] In a preferred embodiment, the counterflow plate is made of polytetrafluoroethylene and is installed in an inclined manner near the outlet of the exhaust gas discharge tube. The counterflow plate is mechanically blocked and gravity-guided, and the surface of the counterflow plate is designed with a porous structure.

[0009] In a preferred embodiment, the exhaust port is composed of a double-layer filter screen and a guide cover. The inner filter screen intercepts residual particles, and the outer guide cover reduces airflow noise and prevents rainwater from flowing back. The exhaust port accelerates the discharge of purified gas through a negative pressure design, and a built-in pressure sensor monitors the air pressure in the box in real time to ensure the stability of system operation.

[0010] In a preferred embodiment, the liquid adding port adopts a funnel-shaped injection structure for regularly replenishing the adsorbent mixed with water and 5 angstrom zeolite powder. The inlet of the liquid adding port is equipped with a detachable filter screen.

[0011] In a preferred embodiment, the adsorbent is formed by mixing water and 5 angstrom zeolite powder in a weight ratio of 95%:5%, and the 5 angstrom zeolite molecular sieve has an effective pore size of 0.5-0.57 nanometers.

[0012] In a preferred embodiment, the cleaning discharge port is a ball valve structure with a diameter of 50 mm, which is used to regularly discharge deposited particles and expired adsorbents. The cleaning discharge port uses gravity to drain the dirty liquid in the box by opening the valve, and cooperates with a high-pressure water gun to wash the attachments on the inner wall of the box.

[0013] In a preferred embodiment, a method for operating a molecular sieve adsorption and suppression system for harmful exhaust gas from a mining diesel locomotive comprises: S1. Exhaust gas introduction: The exhaust gas of mining diesel locomotive is connected to the box through the exhaust gas discharge cylinder, and the end of the cylinder is immersed below the adsorbent liquid level, forcing the exhaust gas to contact with the mixed liquid.

[0014] S2. Gas-liquid mixing: The exhaust gas is fully mixed with the adsorbent in the box, and the zeolite molecular sieve adsorbs CO, NO, and NO x , water phase settling particles.

[0015] S3. Anti-backflow control: The backflow plate blocks the adsorbent liquid from flowing back to the exhaust pipe when the exhaust stops, and the inclined porous structure keeps the air flow channel unobstructed.

[0016] S4. Purification and emission: The treated gas is discharged through the exhaust port on the top of the box, the double-layer filter intercepts the residual particles, and the negative pressure design ensures the emission efficiency.

[0017] S5. Adsorbent replenishment: Regularly inject water and zeolite powder through the liquid filling port. The liquid level scale ensures accurate ratio and the threaded cap is sealed to prevent harmful gas from escaping.

[0018] S6. Circulation treatment: Gas-liquid adsorption reaction is continuously carried out in the box, the 5-angstrom zeolite molecular sieve selectively captures small molecular harmful gases, and the water phase continuously settles particulate matter.

[0019] S7. Maintenance and cleaning: After shutdown, open the cleaning drain port to empty the expired adsorbent and sediment, and use high-pressure flushing to remove the residue attached to the inner wall of the box.

[0020] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are: 1. In the present invention, the system achieves simultaneous treatment of multiple pollutants through the synergistic effect of 5-angstrom zeolite molecular sieve and water. With its specific pore size (0.5-0.57 nanometers), the 5-angstrom zeolite molecular sieve accurately matches the molecular size of harmful gases such as CO and NO, and effectively captures these gases through physical adsorption; the water medium transfers particulate matter produced by incomplete combustion of diesel in the exhaust gas from the gas phase to the liquid phase through gravity sedimentation, thereby reducing the concentration of suspended matter. The countercurrent plate design inside the box prevents liquid backflow during shutdown, and the multi-stage filtration structure of the exhaust port further ensures the gas-liquid separation effect, forming a complete adsorption-sedimentation-emission treatment chain, which solves the problem that traditional technologies cannot take into account both gaseous and particulate pollutants from a mechanistic point of view.

[0021] 2. In the present invention, the system adopts a mine scene adaptability design, taking into account both safety and operability. The corrosion-resistant materials of the box and the exhaust gas discharge tube adapt to the humid and acidic environment underground, extending the life of the equipment; the quick-opening valve for cleaning the discharge port simplifies the maintenance process, and cooperates with low-cost water and zeolite powder consumables to greatly reduce the difficulty and economic investment of operation and maintenance. At the same time, the explosion-proof sealing design of the liquid filling port and the negative pressure control mechanism of the exhaust port effectively avoid the risk of combustible gas explosion in mines. The overall structure of the system is compact and can be directly integrated into the exhaust pipe of a mining diesel locomotive without the need for additional power drive, providing an efficient and low-cost exhaust gas treatment solution for limited space operations underground. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a system block diagram of the present invention. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention. Example

[0024] Reference Figure 1 , A molecular sieve adsorption and suppression system for harmful exhaust gas of a mining diesel locomotive, the system comprising a box body 1, an exhaust gas discharge tube 2, a countercurrent plate 3, an exhaust port 4, a liquid filling port 5, an adsorbent 6 and a cleaning discharge port 7; The exhaust gas discharge tube 2 is connected to the box body 1 as an inlet, and the exhaust gas enters the box body through it; The counterflow plate 3 is located near the exhaust gas inlet in the box 1 and is used to prevent the liquid from flowing back to the exhaust gas discharge tube 2; The liquid filling port 5 is provided on the upper part or the side of the box body 1 and is used to inject the adsorbent 6 mixed with water and 5 angstrom zeolite powder; The adsorbent 6 is mixed with the tail gas in the box 1 to adsorb CO, NO, NO x and settle the particles; the purified gas is discharged from the top or end of the box 1 through the exhaust port 4; The cleaning outlet 7 is located at the bottom of the box 1 and is used to regularly clean the residue. Each component passes through the box 1 to form a closed processing flow.

[0025] The box 1 is the core structure of the adsorption suppression system. It is made of corrosion-resistant metal material and is designed as a closed cavity space inside to carry the entire exhaust gas treatment process. It is equipped with an exhaust port 4 and a liquid filling port 5 on the top, a cleaning discharge port 7 at the bottom, and a side wall connected to the exhaust gas discharge cylinder 2. The gas flow path and the adsorption area are separated by a countercurrent plate 3 inside the box to ensure full contact between the exhaust gas and the adsorbent 6. The box volume needs to be adapted to the exhaust emission of mining diesel locomotives, and the sealing is ensured by welding technology to prevent the leakage of harmful gases. Its structural design takes into account both pressure resistance and maintainability, supporting the physical framework and gas-liquid interaction functions of the entire system.

[0026] The exhaust gas discharge cylinder 2 is the system inlet structure, made of stainless steel, and connected to the exhaust pipe of the mining diesel locomotive and the box 1 through a flange. The interior is a straight-through pipe design, which guides the high-temperature exhaust gas into the adsorption area of ​​the box 1 in a turbulent form. The inner wall of the pipe is coated with a high-temperature resistant ceramic coating to reduce the risk of acidic gas corrosion. The end of the cylinder extends below the liquid level of the box 1 to ensure that the exhaust gas needs to penetrate the mixed liquid layer of the adsorbent 6 to force the gas-liquid two-phase mixing. The structure needs to regularly check the interface sealing to prevent the connection from loosening due to vibration, which affects the exhaust gas treatment efficiency.

[0027] The counterflow plate 3 is a key anti-backflow device inside the box 1. It is made of polytetrafluoroethylene and is installed in an inclined manner near the outlet of the exhaust gas discharge tube 2. Its function is to prevent the adsorbent 6 liquid or particles from flowing back to the exhaust gas discharge tube 2 during shutdown through mechanical blocking and gravity guidance. The surface of the counterflow plate is designed with a porous structure to allow air flow but block liquid backflow. The inclination angle (usually 30°~45°) optimizes gas distribution and anti-blocking effects. The structure must be acid and alkali resistant to avoid aging and failure due to long-term contact with the adsorbent mixture.

[0028] The exhaust port 4 is located at the top of the box 1. It is a purified gas discharge channel and consists of a double-layer filter and a deflector. The inner filter intercepts residual particulate matter, and the outer deflector reduces airflow noise and prevents rainwater from flowing back. The exhaust port accelerates the discharge of purified gas through a negative pressure design. At the same time, a built-in pressure sensor monitors the air pressure in the box in real time to ensure the stability of system operation. The pipe diameter needs to match the exhaust gas treatment flow to prevent gas resistance from causing increased back pressure and affecting diesel engine performance. The filter of this structure needs to be cleaned regularly to avoid carbon accumulation and blockage, which will lead to a decrease in exhaust efficiency.

[0029] The liquid filling port 5 is located at the upper part of the box 1 and adopts a funnel-shaped injection structure for regularly replenishing the adsorbent 6 mixed with water and 5 angstrom zeolite powder. Its inlet is equipped with a removable filter to prevent impurities from entering the box, and is equipped with a liquid level scale mark to assist the operator in controlling the ratio of the mixed liquid (water 95%: zeolite powder 5%). The liquid filling port is sealed by a threaded cap, which has both liquid filling and exhaust functions. It needs to be opened simultaneously during liquid filling to balance the air pressure inside and outside the box. The structural design must comply with the mine explosion-proof standards to prevent static sparks from igniting combustible gases.

[0030] Adsorbent 6 is a mixture of water and 5-angstrom zeolite powder in a weight ratio of 95%:5%, and is the core reaction medium of the system. With an effective pore size of 0.5~0.57 nanometers, the 5-angstrom zeolite molecular sieve selectively adsorbs small molecular harmful gases such as CO (0.376 nm) and NO (0.317 nm) through intermolecular forces; the water phase captures particulate matter in the exhaust gas through gravity sedimentation. The mixed liquid needs to be replenished regularly to maintain the adsorption capacity, and its pH value is controlled at 6.5~7.5 to delay the caking of zeolite powder. The adsorbent has both physical adsorption and chemical adsorption characteristics, and it is necessary to avoid the mixing of oil pollutants to cause pore blockage.

[0031] The cleaning discharge port 7 is located at the lowest point of the bottom of the box 1. It is a ball valve structure with a diameter of 50mm, which is used to regularly discharge deposited particulate matter and failed adsorbent. Its operation needs to be carried out in the shutdown state. By opening the valve, the dirty liquid in the box is drained by gravity, and the attachments on the inner wall of the box 1 are washed with a high-pressure water gun. The discharge port is connected to an external collection device to meet the environmental protection requirements of the mine to prevent secondary pollution. The valve material must be resistant to nitrous acid / nitric acid corrosion, and the sealing ring is made of fluororubber to ensure long-term use without leakage. The maintenance cycle is recommended to be cleaned every 200 hours of operation.

[0032] The system's operating methods include: S1. Exhaust gas introduction: Exhaust gas from a mining diesel locomotive is connected to the housing 1 through the exhaust gas discharge cylinder 2, and the end of the cylinder is immersed below the liquid level of the adsorbent 6, forcing the exhaust gas to contact the mixed liquid.

[0033] S2. Gas-liquid mixing: The tail gas is fully mixed with the adsorbent 6 (95% water + 5% 5 angstrom zeolite powder) in the box 1, and the zeolite molecular sieve adsorbs CO, NO, and NO x , water phase settling particles.

[0034] S3. Anti-backflow control: The backflow plate 3 blocks the liquid of the adsorbent 6 from flowing back to the exhaust gas discharge tube 2 when the exhaust gas stops being discharged, and the inclined porous structure maintains the smooth flow channel.

[0035] S4. Purification and emission: The treated gas is discharged through the exhaust port 4 at the top of the box 1. The double-layer filter intercepts the residual particles, and the negative pressure design ensures the emission efficiency.

[0036] S5. Replenishment of adsorbent: Regularly inject water and zeolite powder through the liquid filling port 5. The liquid level scale ensures accurate ratio and the threaded cap is sealed to prevent harmful gas from escaping.

[0037] S6. Circulation treatment: The gas-liquid adsorption reaction is continuously carried out in the box 1, the 5-angstrom zeolite molecular sieve selectively captures small molecular harmful gases, and the water phase continuously settles particulate matter.

[0038] S7. Maintenance and cleaning: After shutdown, open the cleaning discharge port 7 to drain the spent adsorbent 6 and sediments, and use high-pressure flushing to remove the residue attached to the inner wall of the box body 1.

[0039] From the above we can know: In the present invention, the system achieves simultaneous treatment of multiple pollutants through the synergistic effect of 5-angstrom zeolite molecular sieve and water. With its specific pore size (0.5-0.57 nanometers), the 5-angstrom zeolite molecular sieve accurately matches the molecular size of harmful gases such as CO and NO, and effectively captures these gases through physical adsorption; the water medium transfers particulate matter produced by incomplete combustion of diesel in the exhaust gas from the gas phase to the liquid phase through gravity sedimentation, thereby reducing the concentration of suspended matter. The countercurrent plate design inside the box prevents liquid backflow during shutdown, and the multi-stage filtration structure of the exhaust port further ensures the gas-liquid separation effect, forming a complete adsorption-sedimentation-emission treatment chain, which solves the problem that traditional technologies cannot take into account both gaseous and particulate pollutants from a mechanistic point of view.

[0040] In the present invention, the system adopts a mine scene adaptability design, taking into account both safety and operability. The corrosion-resistant materials of the box and the exhaust gas discharge tube adapt to the humid and acidic environment underground, extending the life of the equipment; the quick-opening valve for cleaning the discharge port simplifies the maintenance process, and cooperates with low-cost water and zeolite powder consumables to greatly reduce the difficulty and economic investment of operation and maintenance. At the same time, the explosion-proof sealing design of the liquid filling port and the negative pressure control mechanism of the exhaust port effectively avoid the risk of combustible gas explosion in mines. The overall structure of the system is compact and can be directly integrated into the exhaust pipe of a mining diesel locomotive without the need for additional power drive, providing an efficient and low-cost exhaust gas treatment solution for limited space operations underground.

[0041] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the term "comprises" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprises a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0042] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A molecular sieve adsorption and suppression system for harmful exhaust gas from mining diesel locomotives, characterized in that: The system comprises a housing (1), an exhaust gas discharge tube (2), a counterflow plate (3), an exhaust port (4), a liquid filling port (5), an adsorbent (6) and a cleaning discharge port (7); The exhaust gas discharge cylinder (2) is connected to the box body (1) as an inlet, and the exhaust gas enters the interior of the box body through the exhaust gas discharge cylinder (2); The counterflow plate (3) is located near the exhaust gas inlet in the box (1) and is used to prevent the liquid from flowing back to the exhaust gas discharge cylinder (2); A liquid filling port (5) is provided on the upper part or the side of the box body (1) and is used for injecting an adsorbent (6) mixed with water and 5 angstrom zeolite powder; The adsorbent (6) is mixed with the exhaust gas in the box (1) to adsorb CO, NO, and NO x and settle the particles; the purified gas is discharged from the top or the end of the box (1) through the exhaust port (4); The cleaning discharge port (7) is located at the bottom of the box body (1) and is used to regularly clean residues; each component passes through the box body (1) to form a closed processing flow.

2. A molecular sieve adsorption and suppression system for harmful exhaust gas from a mining diesel locomotive as claimed in claim 1, characterized in that: The box (1) is made of corrosion-resistant metal material, and its interior is designed as a closed cavity space for carrying the entire exhaust gas treatment process; the top of the box (1) is provided with an exhaust port (4) and a liquid filling port (5), the bottom is provided with a cleaning discharge port (7), and the side wall is connected to the exhaust gas discharge cylinder (2); the inside of the box (1) is separated into a gas flow path and an adsorption zone by a countercurrent plate (3), so as to ensure that the exhaust gas is fully in contact with the adsorbent (6).

3. A molecular sieve adsorption and suppression system for harmful exhaust gas from a mining diesel locomotive as claimed in claim 1, characterized in that: The exhaust gas discharge tube (2) is made of stainless steel, and the exhaust gas discharge tube (2) is connected to the exhaust pipe of the mining diesel locomotive and the box (1) through a flange; the interior of the exhaust gas discharge tube (2) is designed as a straight-through pipe, which guides the high-temperature exhaust gas into the adsorption area of ​​the box (1) in a turbulent form; the inner wall of the exhaust gas discharge tube (2) is coated with a high-temperature resistant ceramic coating, and the end of the exhaust gas discharge tube (2) extends below the liquid level of the box (1) to ensure that the exhaust gas can penetrate the mixed liquid layer of the adsorbent (6).

4. A molecular sieve adsorption and suppression system for harmful exhaust gas from a mining diesel locomotive as claimed in claim 1, characterized in that: The counterflow plate (3) is made of polytetrafluoroethylene and is installed in an inclined manner near the outlet of the exhaust gas discharge tube (2); the counterflow plate (3) is guided by mechanical blocking and gravity, and the surface of the counterflow plate (3) is designed to have a porous structure.

5. A molecular sieve adsorption and suppression system for harmful exhaust gas from a mining diesel locomotive as claimed in claim 1, characterized in that: The exhaust port (4) is composed of a double-layer filter screen and a deflector; the inner filter screen intercepts residual particulate matter, and the outer deflector reduces airflow noise and prevents rainwater from flowing back; the exhaust port (4) accelerates the discharge of purified gas through a negative pressure design, and a built-in pressure sensor monitors the air pressure in the box in real time to ensure the stability of system operation.

6. A molecular sieve adsorption and suppression system for harmful exhaust gas from a mining diesel locomotive as claimed in claim 1, characterized in that: The liquid adding port (5) adopts a funnel-shaped injection structure and is used to regularly replenish the adsorbent (6) mixed with water and 5 angstrom zeolite powder; the inlet of the liquid adding port (5) is provided with a detachable filter screen.

7. A molecular sieve adsorption and suppression system for harmful exhaust gas from a mining diesel locomotive as claimed in claim 1, characterized in that: The adsorbent (6) is formed by mixing water and 5 angstrom zeolite powder in a weight ratio of 95%:5%, and the 5 angstrom zeolite molecular sieve has an effective pore size of 0.5-0.57 nanometers.

8. A molecular sieve adsorption and suppression system for harmful exhaust gas from a mining diesel locomotive as claimed in claim 1, characterized in that: The cleaning discharge port (7) is a ball valve structure with a diameter of 50 mm, and is used to regularly discharge deposited particulate matter and expired adsorbent; the cleaning discharge port (7) uses gravity to drain the dirty liquid in the box body by opening the valve, and cooperates with a high-pressure water gun to wash away the attachments on the inner wall of the box body (1).

9. A molecular sieve adsorption and suppression system for harmful exhaust gas from a mining diesel locomotive as claimed in claim 1, characterized in that: The system's operating methods include: S1. Exhaust gas introduction: The exhaust gas of the mining diesel locomotive is connected to the box (1) through the exhaust gas discharge cylinder (2), and the end of the cylinder is immersed in the adsorbent (6) below the liquid level, forcing the exhaust gas to contact the mixed liquid; S2. Gas-liquid mixing: The exhaust gas is fully mixed with the adsorbent (6) in the box (1), and the zeolite molecular sieve adsorbs CO, NO, and NO x , water phase settling particles; S3. Anti-backflow control: The backflow plate (3) blocks the adsorbent (6) liquid from flowing back to the exhaust gas discharge tube (2) when the exhaust gas is stopped, and the inclined porous structure maintains the smooth flow channel; S4. Purification and emission: The treated gas is discharged through the exhaust port (4) at the top of the box (1). The double-layer filter intercepts the residual particles, and the negative pressure design ensures the emission efficiency. S5. Adsorbent replenishment: water and zeolite powder are regularly injected through the liquid filling port (5). The liquid level scale ensures accurate ratio and the threaded cap is sealed to prevent harmful gas from escaping. S6. Circulation treatment: gas-liquid adsorption reaction is continuously carried out in the box (1), the 5 angstrom zeolite molecular sieve selectively captures small molecule harmful gases, and the water phase continuously settles particulate matter; S7. Maintenance and cleaning: After shutdown, open the cleaning outlet (7) to drain the spent adsorbent (6) and sediment, and use high-pressure flushing to remove any residue attached to the inner wall of the box (1).

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