Hazardous waste warehouse VOCs waste gas treatment device

Abstract

The utility model relates to a hazardous waste warehouse VOCs waste gas treatment device which comprises a waste gas main pipe, a waste gas discharge pipe, an ozone generator, a removal tower and an induced draft fan, and one end of the waste gas main pipe is communicated with the bottom of the removal tower; one end of the waste gas discharge pipe is communicated with the top of the removal tower, and the induced draft fan is fixedly mounted on the waste gas discharge pipe; the ozone generator is communicated with the waste gas main pipe through an ozone pipe. The VOCs waste gas integrated removal tower has the beneficial effects that the structure is simple, the design is reasonable, organic waste gas in the VOCs waste gas is oxidized into CO2 and H2O through the strong oxidizing property of ozone, part of ozone enters the VOCs waste gas integrated removal tower and is dissolved in water, and the ozone and the VOCs waste gas dissolved in the water can further react in the filler layer; meanwhile, the sodium hypochlorite solution also has strong oxidizing property, so that the VOCs waste gas in the tower can be further removed.

Description

Technical Field

[0001] The utility model relates to the technical field of solid waste and hazardous waste storage industry, and in particular to a VOCs waste gas treatment device for hazardous waste warehouses. Background Art

[0002] So far, the main process routes for VOCs waste gas treatment in hazardous waste warehouses at home and abroad are as follows: one is the spray + UV photolysis (catalytic oxidation) + activated carbon adsorption process route; one is the spray + adsorption concentration + catalytic combustion process route; and one is the spray + biological trickling filtration process route.

[0003] Spraying + UV photolysis (catalytic oxidation) + activated carbon adsorption process: Due to the presence of acidic gases in the exhaust gas, although most of them are absorbed by the caustic scrubber, a small amount still escapes and corrodes the internal components of the downstream UV photolysis equipment. At the same time, the outlet of the caustic scrubber contains a large amount of water vapor. In this environment, the life of the UV photolysis lamp is short. Furthermore, the UV lamp contains mercury, which is considered hazardous waste. Although activated carbon can absorb most VOCs exhaust gas, it can also absorb water vapor, and the rate of water vapor adsorption is greater than that of VOCs exhaust gas. This process has high initial operating efficiency, but with operating time, equipment wear, and activated carbon adsorption saturation, the VOC removal efficiency will significantly decrease.

[0004] The spray + adsorption concentration + catalytic combustion process begins with adsorption concentration using an activated carbon / zeolite rotor. When the activated carbon / zeolite rotor reaches saturation, the catalytic combustion equipment (CO furnace) is activated using electric heating. Hot air is then used to locally heat the activated carbon / zeolite rotor adsorption bed. When the catalytic combustion bed is heated to approximately 280-320°C, and the adsorption bed reaches a certain temperature, the highly concentrated exhaust gas desorbed from the adsorption bed can undergo catalytic oxidation in the reaction chamber. Catalytic combustion treatment of organic waste gas offers a high purification rate, but its investment and operating costs are relatively high. Centralized collection of exhaust gas is difficult due to the numerous and dispersed emission points. Multiple catalytic combustion units are required, requiring a significant footprint. Furthermore, precious metal catalysts are susceptible to poisoning and failure due to impurities (such as halogens) in the exhaust gas, leading to high replacement costs. Furthermore, strict control over exhaust gas intake conditions is crucial to prevent blockage in the catalytic combustion chamber, potentially leading to safety incidents.

[0005] Spray + Biotrickling Filtration Process: Biofiltration is a relatively mature pollution control technology that has been researched for a long time. It can remove most malodorous substances, such as ammonia, hydrogen sulfide, methyl mercaptan, methyl sulfide, and methyl sulfide. Advantages: low operating costs, good treatment effects, and no secondary pollution. Disadvantages: slow degradation rate, low removal efficiency, large footprint, and difficult to control operating conditions. Utility Model Content

[0006] The utility model provides a VOCs waste gas treatment device for a hazardous waste warehouse, aiming to solve the problems in the prior art.

[0007] The technical solution of the utility model to solve the above technical problems is as follows:

[0008] A VOCs waste gas treatment device for a hazardous waste warehouse includes a waste gas main, a waste gas exhaust pipe, an ozone generator, a removal tower and an induced draft fan. One end of the waste gas main is connected to the bottom of the removal tower; one end of the waste gas exhaust pipe is connected to the top of the removal tower, and the induced draft fan is fixedly installed on the waste gas exhaust pipe; the ozone generator is connected to the waste gas main through an ozone pipe.

[0009] The beneficial effects of the utility model are as follows: during the treatment process, the VOCs waste gas collected by the waste gas main is extracted by the induced draft fan to the removal tower for VOCs waste gas removal, and the waste gas after removal is discharged into the atmosphere;

[0010] During this process, ozone is sprayed into the main pipe of the exhaust gas collection pipeline. Through the strong oxidizing property of ozone, the organic waste gas in the VOCs exhaust gas is oxidized into CO2 and H20. Part of the ozone enters the VOCs exhaust gas integrated removal tower and dissolves in water. The ozone and VOCs exhaust gas dissolved in water will further react in the packing layer; at the same time, the sodium hypochlorite solution also has strong oxidizing properties, which can further remove the VOCs exhaust gas in the tower.

[0011] The utility model has a simple structure and a reasonable design. Through the strong oxidizing property of ozone, the organic waste gas in the VOCs waste gas is oxidized into CO2 and H20. Part of the ozone enters the VOCs waste gas integrated removal tower and dissolves in water. The ozone and VOCs waste gas dissolved in water will further react in the packing layer. At the same time, the sodium hypochlorite solution also has strong oxidizing property, which can further remove the VOCs waste gas in the tower.

[0012] On the basis of the above technical solution, the present invention can also be improved as follows.

[0013] Furthermore, the removal tower includes a tower body and a packing layer, the bottom of the tower body is connected to one end of the exhaust gas main pipe, and the top of the tower body is connected to one end of the exhaust gas exhaust pipe; the packing layer is fixedly installed in the tower body.

[0014] The beneficial effects of adopting the above further solution are simple structure and reasonable design, and the VOCs waste gas will react in the packing layer to treat the waste gas.

[0015] Furthermore, the removal tower also includes a spray layer and a circulation pump. The spray layer is fixedly installed in the tower body and is located above the packing layer. The outlet of the circulation pump is connected to the spray layer through a pipeline.

[0016] The beneficial effects of adopting the above-mentioned further scheme are simple structure and reasonable design. The strong oxidizing circulating solution is transported to the spray layer through a circulation pump, atomized in the spray layer and forms a film in the filler of the packing layer; VOCs in the exhaust gas undergo oxidation reaction with the solution when passing through the packing layer and the spray layer to generate CO2 and H2O.

[0017] Furthermore, the removal tower also includes a demister, which is fixedly installed in the tower body and located above the spray layer.

[0018] The beneficial effects of adopting the above further solution are simple structure and reasonable design. The demister can effectively remove mist or dust entrained in the gas, thereby ensuring the purity of the gas and the normal operation of the equipment.

[0019] Furthermore, the circulation pump is a horizontal centrifugal pump.

[0020] The beneficial effect of adopting the above further solution is that the advantages of using a horizontal centrifugal pump as the circulation pump here mainly include smooth operation, no leakage, low noise, low failure rate, easy maintenance, and less space.

[0021] Furthermore, the inlet of the circulation pump is connected to the bottom of the tower body through a pipeline.

[0022] The beneficial effects of adopting the above further solution are simple structure, reasonable design, and the use of a circulating pump to circulate the circulating liquid at the bottom of the tower body, thereby saving costs.

[0023] Furthermore, a solution pool filled with circulating liquid is provided at the bottom of the tower body, and the inlet of the circulating pump is connected to the solution pool through a pipeline.

[0024] The beneficial effects of adopting the above further solution are simple structure, reasonable design, and the use of a circulation pump to circulate the circulating liquid in the solution pool, thereby saving costs.

[0025] Furthermore, it also includes an exhaust pipe, the top of which is open and the bottom of which is connected to the other end of the exhaust pipe.

[0026] The beneficial effects of adopting the above further solution are simple structure, reasonable design, and convenient discharge of the treated waste gas into the atmosphere by using an exhaust pipe.

[0027] Furthermore, the other end of the exhaust gas main pipe is connected to a plurality of exhaust gas branch pipes, and the plurality of exhaust gas branch pipes are evenly spaced and connected to a plurality of collecting branch pipes for connecting to the exhaust gas warehouse.

[0028] The beneficial effect of adopting the above further solution is that the exhaust gas main pipe and multiple exhaust gas branch pipes are reasonably distributed, which can collect VOCs exhaust gas in various areas of the hazardous waste warehouse, and the collection effect is better.

[0029] Furthermore, the induced draft fan is a variable frequency centrifugal fan.

[0030] The beneficial effect of adopting the above further solution is that the main advantages of the variable frequency centrifugal fan of the induced draft fan here include adjustable output air volume, precise control of wind pressure, energy saving and environmental protection, stable operation with low noise, and strong adaptability. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0032] Figure 2 It is a structural schematic diagram of the removal tower in the utility model.

[0033] In the accompanying drawings, the components represented by the reference numerals are as follows:

[0034] 1. Exhaust gas main pipe; 2. Ozone generator; 3. Removal tower; 4. Circulation pump; 5. Induced draft fan; 6. Exhaust pipe; 7. Exhaust gas discharge pipe; 8. Packing layer; 9. Spray layer; 10. Demister; 11. Solution tank; 12. Exhaust gas branch pipe; 13. Collection branch pipe; 14. Ozone tube. DETAILED DESCRIPTION

[0035] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features therein can be combined with each other.

[0036] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0037] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0038] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0039] Example 1

[0040] like Figure 1 and Figure 2 As shown, this embodiment provides a VOCs waste gas treatment device for a hazardous waste warehouse, including a waste gas main pipe 1, a waste gas exhaust pipe 7, an ozone generator 2, a removal tower 3 and an induced draft fan 5. One end of the waste gas main pipe 1 is connected to the bottom of the removal tower 3; one end of the waste gas exhaust pipe 7 is connected to the top of the removal tower 3, and the induced draft fan 5 is fixedly installed on the waste gas exhaust pipe 7; the ozone generator 2 is connected to the waste gas main pipe 1 through an ozone pipe 14.

[0041] During the treatment process, the VOCs waste gas collected by the waste gas main 1 is extracted by the induced draft fan 5 to the removal tower 3 for VOCs waste gas removal, and the waste gas after removal is discharged into the atmosphere;

[0042] During this process, ozone is sprayed into the exhaust pipe 1. Through the strong oxidizing property of ozone, the organic waste gas in the VOCs waste gas is oxidized into CO2 and H20. Part of the ozone enters the VOCs waste gas integrated removal tower and dissolves in water. The ozone and VOCs waste gas dissolved in water will further react in the packing layer; at the same time, the sodium hypochlorite solution also has strong oxidizing properties, which can further remove the VOCs waste gas in the tower.

[0043] Based on the above solution, the VOCs waste gas in the warehouse is discharged in an organized manner by using the induced draft fan 5 to draw negative pressure.

[0044] Preferably, in this embodiment, the ozone generator adopts the existing technology, which uses high-frequency ionization to generate ozone, and can use liquid oxygen as the gas source, or can use air as the gas source.

[0045] This embodiment has a simple structure and a reasonable design. Through the strong oxidizing property of ozone, the organic waste gas in the VOCs waste gas is oxidized into CO2 and H20. Part of the ozone enters the VOCs waste gas integrated removal tower and dissolves in water. The ozone and VOCs waste gas dissolved in water will further react in the packing layer. At the same time, the sodium hypochlorite solution also has strong oxidizing properties and can further remove the VOCs waste gas in the tower.

[0046] Example 2

[0047] Based on Example 1, in this embodiment, the removal tower 3 includes a tower body and a packing layer 8, the bottom of the tower body is connected to one end of the exhaust gas main pipe 1, and the top of the tower body is connected to one end of the exhaust gas exhaust pipe 7; the packing layer 8 is fixedly installed in the tower body.

[0048] This solution has a simple structure and reasonable design. VOCs waste gas will react with corresponding substances on the packing layer to treat the waste gas.

[0049] Based on the above solution, the packing layer 8 adopts the ball ring packing layer in the prior art.

[0050] Example 3

[0051] Based on Example 2, in this embodiment, the removal tower 3 also includes a spray layer 9 and a circulation pump 4. The spray layer 9 is fixedly installed in the tower body and is located above the packing layer 8. The outlet of the circulation pump 4 is connected to the spray layer 9 through a pipeline.

[0052] This solution has a simple structure and a reasonable design. The solution is transported to the spray layer 9 through the circulation pump 4. The strongly oxidizing circulating solution is atomized in the spray layer 9 and forms a film on the filler of the packing layer 8. The VOCs in the exhaust gas undergo an oxidation reaction with the solution when passing through the packing layer 8 and the spray layer 9, generating CO2 and H2O.

[0053] Example 4

[0054] On the basis of Example 3, in this embodiment, the removal tower 3 further includes a demister 10 , which is fixedly installed in the tower body and is located above the spray layer 9 .

[0055] This solution has a simple structure and a reasonable design. The demister 10 can effectively remove mist or dust entrained in the gas, thereby ensuring the purity of the gas and the normal operation of the equipment.

[0056] Example 5

[0057] On the basis of any one of Examples 3 to 4, in this embodiment, the circulation pump 4 is a horizontal centrifugal pump.

[0058] The advantages of using a horizontal centrifugal pump as the circulation pump here mainly include smooth operation, no leakage, low noise, low failure rate, easy maintenance, and less space.

[0059] In addition, the circulation pump 4 is a horizontal centrifugal pump made of stainless steel.

[0060] Example 6

[0061] On the basis of any one of Examples 3 to 5, in this embodiment, the inlet of the circulation pump 4 is connected to the bottom of the tower body through a pipeline.

[0062] This solution has a simple structure and a reasonable design. The circulating pump 4 is used to circulate the circulating liquid at the bottom of the tower body, thereby saving costs.

[0063] Example 7

[0064] On the basis of Example 6, in this embodiment, a solution pool 11 filled with circulating liquid is provided at the bottom of the tower body, and an inlet of the circulating pump 4 is connected to the solution pool 11 through a pipeline.

[0065] This solution has a simple structure and a reasonable design. The circulating pump 4 is used to circulate the circulating liquid in the solution pool, thereby saving costs.

[0066] The circulating solution in the solution pool 11 is a strong oxidizing solution, such as sodium hypochlorite or hydrogen peroxide.

[0067] Example 8

[0068] On the basis of the above embodiments, this embodiment further includes an exhaust pipe 6 , the top of the exhaust pipe 6 is open, and the bottom thereof is connected to the other end of the exhaust pipe 7 .

[0069] This solution has a simple structure and a reasonable design, and utilizes the exhaust pipe 6 to discharge the treated waste gas into the atmosphere, which is convenient for discharge.

[0070] Based on the above solution, the exhaust pipe 6 is preferably a cylindrical structure with a thick lower end and a thin upper end.

[0071] In addition, the function of the exhaust pipe 6 is to discharge the waste gas after the reaction and diffuse it into the atmosphere. At the same time, the reserved detection port can detect the concentration of pollutants in the atmosphere after the discharge.

[0072] Example 9

[0073] On the basis of the above embodiments, in this embodiment, the other end of the exhaust main pipe 1 is connected to a plurality of exhaust branch pipes 12 , and the plurality of exhaust branch pipes 12 are evenly spaced and connected to a plurality of collecting branch pipes 13 for connecting to the exhaust warehouse.

[0074] The exhaust main pipe 1 and the plurality of exhaust branch pipes 12 are reasonably distributed, and can collect VOCs exhaust gas in various areas of the hazardous waste warehouse, with a better collection effect.

[0075] Preferably, in this embodiment, multiple exhaust branch pipes 12 are positioned around the hazardous waste warehouse, with one end connected to the other end of the exhaust main pipe 1, and the other ends of the multiple exhaust branch pipes 12 are sealed. Multiple collection branch pipes 13 are arranged perpendicular to the corresponding exhaust branch pipes 12, with one end connected to the corresponding exhaust branch pipe 12 and the other end extending into the hazardous waste warehouse.

[0076] Example 10

[0077] On the basis of the above embodiments, in this embodiment, the induced draft fan 5 is a variable frequency centrifugal fan.

[0078] The main advantages of the variable frequency centrifugal fan for induced draft fans here include adjustable output air volume, precise control of wind pressure, energy saving and environmental protection, stable operation with low noise, and strong adaptability.

[0079] Based on the above solution, the fan casing of the induced draft fan 5 is made of acid-resistant, alkali-resistant and aging-resistant fiberglass, the impeller is made of resistant stainless steel, and the motor is an explosion-proof motor.

[0080] The working principle of this utility model is as follows:

[0081] During the treatment process, the VOCs waste gas collected by the waste gas main 1 is extracted by the induced draft fan 5 to the removal tower 3 for VOCs waste gas removal, and the waste gas after removal is discharged into the atmosphere;

[0082] During this process, ozone is sprayed into the exhaust pipe 1. Through the strong oxidizing property of ozone, the organic waste gas in the VOCs waste gas is oxidized into CO2 and H20. Part of the ozone enters the VOCs waste gas integrated removal tower and dissolves in water. The ozone and VOCs waste gas dissolved in water will further react on the packing layer; at the same time, the sodium hypochlorite solution also has strong oxidizing properties, which can further remove the VOCs waste gas in the tower.

[0083] The utility model proposes a new combination of VOCs treatment equipment for removing VOCs waste gas from hazardous waste warehouses. The technology of the integrated VOCs waste gas removal tower for hazardous waste warehouses first optimizes and upgrades the original alkali washing tower, and transforms the alkali washing tower into an integrated VOCs waste gas removal tower. The tower is provided with a packing layer, a spray layer, a demister, and a supporting solution circulation system. The tower uses sodium hypochlorite as a circulating solution. Before the integrated VOCs waste gas removal tower, ozone is sprayed into the main pipe of the waste gas collection pipeline. Through the strong oxidizing property of ozone, the organic waste gas in the VOCs waste gas is oxidized into CO2 and H20; part of the ozone enters the integrated VOCs waste gas removal tower and dissolves in water, and the ozone and VOCs waste gas dissolved in water will further react in the packing layer; at the same time, the sodium hypochlorite solution also has strong oxidizing properties, which can further remove the VOCs waste gas in the tower.

[0084] It should be noted that all electronic components involved in the present invention adopt existing technologies, and the above components are electrically connected to the controller, and the control circuits between the controller and the components are existing technologies.

[0085] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be encompassed within the present invention. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

[0086] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

[0087] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A hazardous waste warehouse VOCs waste gas treatment device, characterized by: The invention comprises an exhaust gas main pipe (1), an exhaust gas exhaust pipe (7), an ozone generator (2), a removal tower (3) and an induced draft fan (5), wherein one end of the exhaust gas main pipe (1) is connected to the bottom of the removal tower (3); one end of the exhaust gas exhaust pipe (7) is connected to the top of the removal tower (3); the induced draft fan (5) is fixedly mounted on the exhaust gas exhaust pipe (7); and the ozone generator (2) is connected to the exhaust gas main pipe (1) via an ozone pipe (14).

2. The hazardous waste warehouse VOCs waste gas treatment device according to claim 1 is characterized by: The removal tower (3) comprises a tower body and a packing layer (8), wherein the bottom of the tower body is connected to one end of the exhaust gas main pipe (1), and the top of the tower body is connected to one end of the exhaust gas exhaust pipe (7); the packing layer (8) is fixedly installed in the tower body.

3. The hazardous waste warehouse VOCs waste gas treatment device according to claim 2 is characterized by: The removal tower (3) further comprises a spray layer (9) and a circulation pump (4); the spray layer (9) is fixedly installed in the tower body and is located above the packing layer (8); and the outlet of the circulation pump (4) is connected to the spray layer (9) through a pipeline.

4. The hazardous waste warehouse VOCs waste gas treatment device according to claim 3 is characterized by: The removal tower (3) further comprises a demister (10), wherein the demister (10) is fixedly installed in the tower body and is located above the spray layer (9).

5. The hazardous waste warehouse VOCs waste gas treatment device according to claim 3 is characterized by: The circulating pump (4) is a horizontal centrifugal pump.

6. The hazardous waste warehouse VOCs waste gas treatment device according to claim 3 is characterized by: The inlet of the circulation pump (4) is communicated with the bottom of the tower body through a pipeline.

7. The hazardous waste warehouse VOCs waste gas treatment device according to claim 6, characterized in that: A solution pool (11) filled with circulating liquid is provided at the bottom of the tower body, and an inlet of the circulating pump (4) is connected to the solution pool (11) through a pipeline.

8. The hazardous waste warehouse VOCs waste gas treatment device according to any one of claims 1 to 7, characterized in that: It also includes an exhaust pipe (6), the top of the exhaust pipe (6) is open, and the bottom is connected to the other end of the exhaust pipe (7).

9. The hazardous waste warehouse VOCs waste gas treatment device according to any one of claims 1 to 7, characterized in that: The other end of the waste gas main pipe (1) is connected to a plurality of waste gas branch pipes (12), and the plurality of waste gas branch pipes (12) are evenly spaced and connected to a plurality of collecting branch pipes (13) for connecting to a waste gas warehouse.

10. The hazardous waste warehouse VOCs waste gas treatment device according to any one of claims 1 to 7, characterized in that: The induced draft fan (5) is a variable frequency centrifugal fan.

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