Biological treatment equipment for gas inspection and maintenance

Abstract

The utility model discloses biological treatment equipment for inspection and maintenance gas. The biological treatment equipment comprises a biological trickling filter and a biological catalase tower, a trickling filtration module and a spraying pipeline positioned above the trickling filtration module are arranged in the bio-trickling filtration tower; a biological catalase module and a demisting module are arranged in the biological catalase tower, the biological catalase module is arranged above the demisting module, and the demisting module is arranged above the air inlet connector. According to the application, the bio-trickling filter and the bio-catalase tower are combined, the bio-trickling filter is used for front-end treatment to remove most easily degradable pollutants and reduce the concentration of pollutants in waste gas, and the bio-catalase tower is used for rear-end deep treatment to further adsorb residual refractory pollutants and peculiar smell substances; therefore, more efficient and more thorough purification of the inspection and maintenance gas is realized.

Description

Technical Field

[0001] This utility model relates to the field of waste gas treatment technology, and in particular to a biological treatment device for maintenance and repair gas. Background Technology

[0002] In industrial production, ensuring regular equipment inspection and maintenance is crucial for safe and smooth operation. However, this process inevitably generates large quantities of waste gas, which is complex and variable in composition, typically containing volatile organic compounds (VOCs), hydrogen sulfide, ammonia, and various dust particles. Traditional waste gas treatment technologies, such as combustion and adsorption, can treat these gases to some extent, but they generally suffer from high energy consumption, high treatment costs, and a tendency to cause secondary pollution. Faced with the complex and variable composition of maintenance and repair waste gas, these traditional treatment technologies often fail to achieve satisfactory results. Summary of the Invention

[0003] To address the aforementioned technical problems, this utility model provides a biological treatment device for maintenance and repair gas. To provide a basic understanding of some aspects of the disclosed embodiments, a brief summary is given below. This summary is not intended as a general description, nor is it intended to identify key / important components or to describe the scope of protection of these embodiments. Its sole purpose is to present some concepts in a simple form as a prelude to the detailed description that follows.

[0004] The present invention adopts the following technical solution:

[0005] A biological treatment device for maintenance and repair gas is provided, comprising a cooling pretreatment device, a primary adsorption device, a secondary adsorption device, a bio-trickling filter, and a bio-catalyst tower arranged sequentially according to the gas conveying direction; the bio-trickling filter tower is provided with a trickling module and a spray pipeline located above the trickling module; the bio-catalyst tower is provided with a bio-catalyst module and a demisting module, the bio-catalyst module being located above the demisting module and the demisting module being located above the gas inlet of the bio-catalyst tower, the bio-catalyst module being composed of a plurality of bio-catalyst units evenly arranged from top to bottom.

[0006] Furthermore, the bio-trickling filter tower includes: a trickling filter tower inlet and a gas distribution pipeline; the trickling filter tower inlet is located on the side wall of the bio-trickling filter tower body and is connected to the exhaust gas outlet of the secondary adsorption device through a delivery pipeline; the gas distribution pipeline is located inside the bio-trickling filter tower and below the trickling module, and is connected to the trickling filter tower inlet.

[0007] Furthermore, the bio-trickling filter also includes: a storage tank, a storage vessel, a peristaltic pump, and a supply pipeline; the storage tank is located at the bottom of the bio-trickling filter, the storage tank is connected to the inlet of the peristaltic pump through a first supply pipe, the storage vessel is connected to the inlet of the peristaltic pump through a second supply pipe, and the outlet of the peristaltic pump is connected to the spray pipeline through the supply pipeline.

[0008] Furthermore, the bio-trickling filter tower also includes a sampling port and a spray head. The sampling port is located on the side wall of the bio-trickling filter tower and connected to the trickling module. The spray head is located on the spray pipeline.

[0009] Furthermore, the bio-trickling filter tower also includes: an air supply pipeline; an air outlet is provided at the top of the bio-trickling filter tower, and an air inlet is provided on the side of the bio-trickling filter tower, with the air outlet connected to the air inlet via the air supply pipeline.

[0010] Furthermore, the trickling filter module includes: a support frame, packing material, and several staggered guide plates; the support frame is disposed on the inner wall of the bio-trickling filter tower, the packing material is disposed on the support frame, the guide plates are in an inclined state, and the bottom end of the upper guide plate faces the middle of the upper surface of the lower guide plate, and through holes are formed on the guide plates.

[0011] Furthermore, the bio-catalyst tower includes a drain valve and an exhaust port; the drain valve is located at the bottom of the side of the bio-catalyst tower body, and the exhaust port is located at the top of the bio-catalyst tower.

[0012] Furthermore, the demisting module includes a frame and a polytetrafluoroethylene layer, wherein the frame is disposed on the inner wall of the biocatalyst tower, and the polytetrafluoroethylene layer is disposed on the frame.

[0013] Furthermore, the bio-catalyst unit includes: an outer shell and activated carbon packing loaded with microorganisms and bio-enzymes, the outer shell being disposed on the inner wall of the bio-catalyst tower, and the activated carbon packing being disposed inside the outer shell.

[0014] The beneficial effects of this utility model are as follows: This application combines a bio-trickling filter tower and a bio-catalyst tower. The bio-trickling filter tower serves as the front-end treatment, first removing most of the easily degradable pollutants and reducing the concentration of pollutants in the exhaust gas. The bio-catalyst tower serves as the back-end deep treatment, further adsorbing the residual difficult-to-degrade pollutants and odor substances, thereby achieving more efficient and thorough purification of maintenance and repair gas. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the structure of a biological treatment device for maintenance gas according to the present invention;

[0017] Figure 2 This is a schematic diagram of the structure of the bio-trickling filter tower of this utility model;

[0018] Figure 3 This is a schematic diagram of the structure of the biocatalyst tower of this utility model. Detailed Implementation

[0019] The embodiments of this utility model will now be described in detail with reference to the accompanying drawings. It should be understood that the described embodiments are merely some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0020] In industries such as petrochemicals, pharmaceuticals, and coating, equipment maintenance and repair generate waste gases. These waste gases typically contain volatile organic compounds (VOCs), harmful gases, and other pollutants, with complex compositions that may include hydrocarbons, alcohols, ketones, and other harmful components. If these waste gases are directly released into the atmosphere without proper treatment, they will pollute the environment. Therefore, effective treatment technologies must be employed to ensure that these waste gases meet environmental standards before being emitted.

[0021] like Figure 1-3 As shown in some illustrative embodiments, a biological treatment device for maintenance gas is provided, comprising a cooling pretreatment device 100, a primary adsorption device 200, a secondary adsorption device 300, a bio-trickling filter 400, and a bio-catalyst tower 500 arranged sequentially in the direction of conveying the maintenance gas.

[0022] First, the maintenance exhaust gas enters the cooling pretreatment device 100. The cooling pretreatment device 100 uses water or air to cool the exhaust gas to reduce its temperature, which facilitates subsequent treatment and helps to remove some large particulate matter, thus reducing the burden on subsequent treatment modules.

[0023] The cooled exhaust gas enters the primary adsorption unit 200 for initial adsorption treatment. The primary adsorption unit 200 typically uses a specific liquid adsorbent, such as water or a special chemical solution, to adsorb volatile organic compounds (VOCs) and other harmful gases in the exhaust gas, achieving preliminary purification. After primary adsorption, the exhaust gas flows into the secondary adsorption unit 300 for more in-depth secondary adsorption treatment. The secondary adsorption unit 300 is designed to further remove residual pollutants in the exhaust gas, improving overall purification efficiency. The primary adsorption unit 200 and the secondary adsorption unit 300 can use different liquid adsorbents to more effectively adsorb specific pollutants.

[0024] When processing complex maintenance gases, relying solely on the cooling pretreatment device 100, the primary adsorption device 200, and the secondary adsorption device 300 may not achieve complete purification. Therefore, this embodiment introduces a bio-trickling filter 400 and a bio-catalyst tower 500 based on the aforementioned processing units to further improve processing efficiency. The bio-trickling filter 400 includes: a trickling module 410, a spray pipeline 420, a trickling filter inlet 430, a gas distribution pipeline 440, a liquid storage tank 450, a liquid storage container 460, a peristaltic pump 470, a liquid supply pipeline 480, a sampling port 490, a ventilation pipeline 700, and a gas outlet connection port 491.

[0025] The inlet 430 of the trickling filter is located on the side wall of the bio-trickling filter 400, specifically in the lower half of the filter body. It is connected to the exhaust outlet of the secondary adsorption unit 300 via a delivery pipeline 600. The pre-treated exhaust gas enters the bio-trickling filter 400 through the inlet 430. The gas distribution pipeline 440 is a gas distribution system installed inside the bio-trickling filter 400. One end of the pipeline connects to the inlet 430, and the other end extends to the center of the filter body. This ensures that the maintenance gas entering from the inlet 430 is evenly distributed throughout the bio-trickling filter 400, thereby maximizing the gas-solid contact area and improving treatment efficiency.

[0026] The trickling filter module 410, the spray line 420, and the gas distribution line 440 are all installed inside the bio-trickling filter tower 400, with the spray line 420 located above the trickling filter module 410 and the gas distribution line 440 located below the trickling filter module 410.

[0027] After the exhaust gas enters the trickling filter tower through the inlet 430, it first passes through the gas distribution line 440 located below the trickling module 410. The gas distribution line 440 ensures that the exhaust gas is evenly distributed throughout the bottom of the tower and flows upward through the trickling module 410. Simultaneously, the spray line 420 above the trickling module 410 begins operation, spraying a nutrient solution conducive to microbial growth onto the trickling module 410 to maintain the moisture of the packing material within the module, providing the necessary humidity and nutrients for the microorganisms attached to the packing material. The microorganisms utilize their metabolism to decompose the organic pollutants in the exhaust gas into harmless water and carbon dioxide. This biodegradation process is energy-efficient, requires no high temperatures or chemical additives, thus resulting in low operating costs and no secondary pollution.

[0028] After biodegradation, the gas continues to flow upwards and is eventually discharged from the top of the biotrickling filter 400. Through the above structural design, the biotrickling filter 400 not only achieves uniform distribution of waste gas, but also improves the efficiency of biodegradation through the spray system, ensuring that organic pollutants in the waste gas are effectively treated, while maintaining the growth environment of microorganisms inside the tower.

[0029] A storage tank 450 is located at the bottom of the bio-trickling filter tower and is used to collect and store the spray liquid falling through the trickling module 410. The storage tank 450 is connected to the inlet of the peristaltic pump 470 via a first delivery pipe 451, and a storage tank 460 is connected to the inlet of the peristaltic pump 470 via a second delivery pipe 461. The outlet of the peristaltic pump 470 is connected to the spray line 420 via a supply line 480. The peristaltic pump 470 is used to draw and transport the nutrient solution. The storage tank 460 is an independent tank containing a nutrient solution conducive to bacterial growth. The storage tank 460 is connected to the spray line 420, which is equipped with multiple spray heads 421. The spray heads 421 are used to evenly spray the liquid into the packing material of the trickling module 410.

[0030] When the bio-trickling filter 400 is operating, the spray solution is drawn from the storage tank 450 or storage vessel 460 by the peristaltic pump 470. If the amount of spray solution in the storage tank 450 is sufficient, the peristaltic pump 470 will circulate the spray solution from the storage tank 450 and deliver it to the spray line 420 through the supply line 480, where it will be sprayed onto the trickling filter module 410 by the spray head 421 to maintain the moisture of the biological packing material and provide the nutrients required for microbial growth. When the amount of spray solution in the storage tank 450 decreases to a certain level, the peristaltic pump 470 will automatically draw nutrient solution from the storage vessel 460 to replenish the liquid demand of the spray system.

[0031] Sampling port 490 is located on the side wall of the bio-trickling filter tower 400 and connected to the trickling filter module 410. The trickling filter module 410 is provided with two sampling ports 490, which are used to inspect the condition of the packing material in the trickling filter module 410 and for subsequent replacement and maintenance.

[0032] The trickling filter module 410 includes: a support frame 411, packing material 412, and several guide plates 413.

[0033] The support frame 411 is disposed on the inner wall of the bio-trickling filter 400 to support and fix the packing 412, and is made of stainless steel. The packing 412 is disposed on the support frame 411 and is usually made of a material with a high specific surface area, such as plastic, ceramic or metal, to provide a surface for microbial growth.

[0034] Baffles 413 are disposed within the packing 412, arranged in a staggered and inclined manner, with the bottom end of the upper baffle 413 facing the middle of the upper surface of the lower baffle 413, forming a stepped layout. Through holes are provided on the baffles 413. The structural design and arrangement of the baffles 413 are intended to improve the flow of the nutrient solution while ensuring uniform and smooth passage of exhaust gas through the packing 412. This ensures the nutrient solution is evenly distributed within the packing 412, extending the flow path and increasing the contact time, which is beneficial for biodegradation.

[0035] The top of the bio-trickling filter 400 is equipped with an outlet port 491, which serves as the interface for the exhaust gas treated by the bio-trickling filter to be discharged. The side of the bio-catalyst tower 500 is equipped with an inlet port 510, which is the entry point for exhaust gas to enter the bio-catalyst tower for further treatment. The outlet port 491 is connected to the inlet port 510 via a ventilation pipeline 700, allowing the exhaust gas discharged from the bio-trickling filter 400 to flow into the bio-catalyst tower 500 for subsequent treatment.

[0036] The bio-catalyst tower 500 includes: an air inlet connection 510, a liquid drain valve 520, an exhaust port 530, a bio-catalyst module 540, and a demisting module 550.

[0037] The bio-catalyst module 540 and the demister module 550 are located inside the bio-catalyst tower 500. The bio-catalyst module 540 is positioned above the demister module 550, which is also positioned above the air inlet 510. The exhaust gas treated by the bio-trickling filter 400 enters the air inlet 510 of the bio-catalyst tower 500 through the ventilation pipeline 700. The exhaust gas then rises and passes through the demister module 550, which isolates water vapor before entering the bio-catalyst module 540, preventing the bio-activated carbon in the bio-catalyst module 540 from being affected and ensuring the treatment effect of the bio-catalyst module 540. The exhaust gas purified by the demister module 550 continues to rise to the bio-catalyst module 540, where residual pollutants are further decomposed under the catalytic action of enzymes. The treated exhaust gas is finally discharged from the top exhaust port 530 of the bio-catalyst tower 500.

[0038] A drain valve 520 is located at the bottom of the side of the bio-catalyst tower 500 and is used to drain the liquid condensed in the demister module 550. The drain valve 520 is a threaded valve. An exhaust port 530 is located at the top of the bio-catalyst tower 500 and serves as the final discharge port for the treated waste gas.

[0039] The defogging module 550 includes: a frame 551 and a polytetrafluoroethylene layer 552.

[0040] The frame 551 is installed on the inner wall of the bio-catalyst tower 500 to support and fix the polytetrafluoroethylene (PTFE) layer 552. The PTFE layer 552 is a material with excellent hydrophobicity and is typically installed on the frame 551 in the form of a fine mesh, corrugated plate, or other porous structure. Its function is to intercept and collect droplets and particulate matter in the exhaust gas. When the exhaust gas passes through the demister module 550, droplets and particulate matter are collected due to the reduced airflow velocity and the interception effect of the PTFE layer, while the purified gas continues to flow upwards.

[0041] The bio-catalyst module 540 utilizes the synergistic effect of microorganisms and bio-enzymes to further degrade organic pollutants in the exhaust gas. It consists of several bio-catalyst units evenly arranged from top to bottom, forming a continuous treatment layer. When the exhaust gas passes through these units, it will come into full contact with the activated carbon packing 542 to ensure treatment efficiency.

[0042] The biocatalyst unit includes: a shell 541 and an activated carbon filler 542.

[0043] The outer shell 541 is disposed on the inner wall of the bio-catalyst tower 500, and the activated carbon packing 542 is disposed inside the outer shell 541. The activated carbon packing 542 is activated carbon loaded with microorganisms and bio-enzymes, used to exert the effects of microbial degradation of pollutants and the specific effects of bio-enzymes. That is, the microorganisms in the activated carbon packing 542 decompose organic matter in the waste gas through biodegradation, while the bio-enzymes accelerate these chemical reactions through their specific catalytic effects. For some recalcitrant organic pollutants and small amounts of pollutants that remain after treatment, simple bio-trickling filtration is difficult to achieve ideal removal results. In this embodiment, the porous structure of the activated carbon used in the bio-catalyst unit provides a surface for microbial growth and also provides a place for bio-enzymes to perform their functions, exhibiting a strong adsorption capacity for various organic pollutants and odor substances.

[0044] After pretreatment, primary adsorption, and secondary adsorption, the waste gas enters the biotrickling filter 400. After treatment in the biotrickling filter 400, the waste gas finally flows into the biocatalyst tower 500. Even after pretreatment and adsorption, a small amount of pollutants that are difficult to remove by physicochemical methods may still remain in the waste gas. Biological treatment utilizes the metabolism of microorganisms to decompose and transform these residual pollutants, further reducing their concentration and achieving deep purification to ensure that the final emission gas meets standards. This embodiment combines biotrickling filtration and biocatalyst technology. After biotrickling filtration and demisting, the waste gas enters the biocatalyst treatment, allowing the biodecomposition and adsorption processes to be fully utilized, thereby achieving highly efficient purification of maintenance and repair gas.

[0045] This embodiment first removes most pollutants through physical adsorption, and then uses bio-trickling filtration and enzyme catalytic decomposition to treat the remaining recalcitrant substances. This design greatly improves the ability to treat complex maintenance and repair gases, ensuring that the final emitted gases meet environmental standards and effectively reducing environmental pollution.

[0046] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A biological treatment apparatus for treating exhaust gas, characterized by comprising: The device comprises, in sequence along the conveying direction of the repair gas, a cooling pretreatment device, a first-stage adsorption device, a second-stage adsorption device, a biological trickling filter tower, and a biological enzyme tower; the biological trickling filter tower is provided with a trickling filter module and a spray pipeline above the trickling filter module; the biological enzyme tower is provided with a biological enzyme module and a demisting module, the biological enzyme module is arranged above the demisting module, the demisting module is arranged above the air inlet connection port of the biological enzyme tower, and the biological enzyme module is composed of a plurality of biological enzyme units arranged uniformly from top to bottom.

2. A biological treatment plant for the treatment of waste air according to claim 1, characterized in that The biological trickling filter tower comprises an air inlet of the trickling filter tower and a gas distribution pipeline. The air inlet of the trickling filter tower is arranged on the sidewall of the tower body of the biological trickling filter tower and connected to the exhaust gas outlet of the second-stage adsorption device through a conveying pipeline, and the gas distribution pipeline is arranged in the biological trickling filter tower below the trickling filter module and connected to the air inlet of the trickling filter tower.

3. A biological treatment plant for the treatment of waste air according to claim 2, characterized in that The biological trickling filter tower further comprises a liquid storage pool, a liquid storage tank, a peristaltic pump, and a liquid supply pipeline. The liquid storage pool is arranged at the bottom of the biological trickling filter tower, the liquid storage pool is connected to the liquid inlet of the peristaltic pump through a first liquid conveying pipe, the liquid storage tank is connected to the liquid inlet of the peristaltic pump through a second liquid conveying pipe, and the liquid outlet of the peristaltic pump is connected to the spray pipeline through the liquid supply pipeline.

4. A biological treatment plant for the treatment of waste air according to claim 3, characterized in that The biological trickling filter tower further comprises a sampling port and a spray head, the sampling port is arranged on the sidewall of the tower body of the biological trickling filter tower and connected to the trickling filter module, and the spray head is arranged on the spray pipeline.

5. A biological treatment plant for the treatment of waste air according to claim 4, characterized in that The biological trickling filter tower further comprises an air venting pipeline; the top of the biological trickling filter tower is provided with an air outlet connection port, the side of the biological enzyme tower is provided with the air inlet connection port, and the air outlet connection port is connected to the air inlet connection port through the air venting pipeline.

6. A biological treatment plant for the treatment of waste air according to claim 5, characterized in that The trickling filter module comprises a bearing frame, filler, and a plurality of staggered flow guide plates; the bearing frame is arranged on the inner wall of the biological trickling filter tower, the filler is arranged on the bearing frame, the flow guide plates are in an inclined state, the bottom end of the upper flow guide plate faces the middle position of the upper surface of the lower flow guide plate, and a through hole is formed in the flow guide plate.

7. A biological treatment plant for the treatment of waste air according to claim 5, characterized in that The biological enzyme tower comprises a liquid discharge valve and an air outlet; the liquid discharge valve is arranged at the bottom of the sidewall of the tower body of the biological enzyme tower, and the air outlet is arranged at the top of the biological enzyme tower.

8. A biological treatment plant for the treatment of waste air according to claim 7, characterized in that The demisting module comprises a frame and a polytetrafluoroethylene layer; the frame is arranged on the inner wall of the biological enzyme tower, and the polytetrafluoroethylene layer is arranged on the frame.

9. A biological treatment plant for the treatment of waste air according to claim 8, characterized in that The biological enzyme unit comprises an outer shell and activated carbon filler loaded with bacteria and biological enzymes; the outer shell is arranged on the inner wall of the biological enzyme tower, and the activated carbon filler is arranged in the outer shell.

Images