Chemical waste gas treatment device

Abstract

The utility model provides a chemical waste gas treatment device, which relates to the field of chemical waste gas treatment and comprises a first support, the top of the first support is fixedly connected with a compression fan, an air inlet of the compression fan is fixedly connected with an air inlet pipe, and the flow direction is adjusted through a first three-way valve mechanism. The waste gas can enter a heavy component recovery tower or a residue loading gas phase line, the vacuum power pump takes self-produced compressed air as a source to reduce the pressure of the residue loading gas phase line, and the odor treatment system guides the waste gas to the tail gas catalysis system by virtue of a newly added pipeline and a spherical valve, so that the treatment of the waste gas such as phthalic anhydride gas is realized, and the leakage pollution of the phthalic anhydride gas is reduced; aiming at the problem in the prior art that phthalic anhydride gas is easy to leak from a gas phase port of a slag car to pollute the environment when residues are loaded, the gas phase line pressure of the slag car is reduced through a vacuum power pump, and a first three-way valve mechanism is matched to accurately control airflow, so that waste gas enters a peculiar smell treatment pipeline more smoothly, the situation that the phthalic anhydride gas emerges from the gas phase port of the slag car is greatly reduced, and the service life is prolonged. The pollution to the environment is effectively reduced.

Description

Technical Field

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

[0002] During normal production, the phthalic anhydride unit generates light and heavy component residues, which are removed through the top of the light component tower and the bottom of the product tower for heavy component slag discharge. The main function is to remove substances such as benzoic acid, citrate anhydride, and phthalide from the phthalic anhydride, thus ensuring product quality. The removed light and heavy components are collected in light and heavy component tanks. Once the tanks reach a certain liquid level, they are transferred for processing. The residue loading procedure is as follows: a metal hose is connected to the loading port at the top of the residue delivery line and then to the top inlet of the slag truck tank. The residue is forced out using positive nitrogen pressure inside the tank. The other end of the tank truck is connected to a vapor line and then to a collection box. Odor control fans are used for condensation and collection. When a certain amount of waste is collected, the manhole of the collection box needs to be opened for cleaning, and the phthalic anhydride is removed and transferred for hazardous waste disposal.

[0003] The existing technology has the following shortcomings:

[0004] 1) Because the phthalic anhydride gas generated during the loading of the slag is extracted by the induced draft fan, it is difficult to avoid a small amount of gas escaping from the gas phase port of the slag car, which will cause some pollution to the environment.

[0005] 2) Cleaning the collection box requires manual labor and the odor emitted is harmful to human health and the environment. Summary of the Invention

[0006] This utility model uses a compressed air blower to pressurize the air, and adjusts the flow direction through a first three-way valve mechanism, allowing the air to enter the heavy component recovery tower or the vapor line of the residue loading truck. The vacuum power pump uses its own compressed air as a source to reduce the pressure of the vapor line of the residue truck, thereby solving the problems mentioned in the background art.

[0007] To achieve the above objectives, the present invention adopts the following technical solution: a chemical waste gas treatment device, comprising: a first support, a compressor fan fixedly connected to the top of the first support, an air inlet pipe fixedly connected to the air inlet of the compressor fan, a first air delivery pipe fixedly connected to the output end of the compressor fan, and a first three-way valve mechanism fixedly connected to one end of the first air delivery pipe; the first three-way valve mechanism includes a motor, and a second support is fixedly connected to the bottom of the motor.

[0008] Preferably, a support plate is fixedly connected to the bottom of the second bracket, and a ball valve is fixedly connected to the output end of the motor.

[0009] Preferably, the outer wall of the ball valve is fitted with a valve tube shell.

[0010] Preferably, the inner wall of the valve pipe housing is provided with a rotating groove.

[0011] Preferably, the outer wall of the valve tube housing is fixedly connected to a bidirectional connecting pipe.

[0012] Preferably, the outer wall of the bidirectional connecting pipe is fixedly connected to a heavy component recovery tower connecting pipe, and the outer wall of the bidirectional connecting pipe is fixedly connected to a residue loading vapor phase line.

[0013] Preferably, a third bracket is fixedly connected to the outer wall of the residue loading vapor phase line, and the bottom of the third bracket is connected to the ground.

[0014] Preferably, the outer wall of the valve tube housing is fixedly connected to the air inlet of the first vacuum power pump, and the outer wall of the valve tube housing is fixedly connected to an odor control pipe.

[0015] Preferably, one end of the odor control pipe is fixedly connected to a second vacuum power pump, and the output end of the second vacuum power pump is fixedly connected to a second three-way valve mechanism.

[0016] Preferably, one end of the second three-way valve mechanism is fixedly connected to the tail gas catalytic system of the 20,000-ton unit, the outer wall of the second three-way valve mechanism is fixedly connected to the tail gas catalytic system of the technical upgrade unit, and the outer wall of the second three-way valve mechanism is fixedly connected to the tail gas catalytic system of the technical upgrade unit.

[0017] Compared with the prior art, the advantages and positive effects of this utility model are as follows:

[0018] 1. In this utility model, the flow direction is adjusted by the first three-way valve mechanism, allowing the gas to enter the heavy component recovery tower or the residue loading vapor line. The vacuum power pump uses self-generated compressed air as its source to reduce the pressure of the residue truck vapor line. The odor control system, with the help of the newly added pipeline and ball valve, guides the exhaust gas to the tail gas catalytic system to treat phthalic anhydride and other waste gases, reducing phthalic anhydride leakage pollution. Addressing the problem in existing technologies where phthalic anhydride easily leaks from the residue truck vapor line during loading, polluting the environment, the vacuum power pump reduces the pressure of the residue truck vapor line, and the first three-way valve mechanism precisely controls the airflow, allowing the exhaust gas to enter the odor control pipeline more smoothly. This greatly reduces the occurrence of phthalic anhydride escaping from the residue truck vapor line, effectively reducing environmental pollution.

[0019] 2. In this utility model, given that existing cleaning and collection boxes require manual operation and produce odors that are harmful to human health and the environment, this device introduces waste gas into the tail gas catalytic system, where harmful gases such as phthalic anhydride are treated. This eliminates the need for manual cleaning of phthalic anhydride waste in the collection box, avoiding human contact with volatile odors and reducing harm to human health. The components are fixedly connected, such as the first support to the compressor and the second support to the motor, ensuring the stability of the equipment during operation and reducing malfunctions caused by loose components. The modular design of the device makes later maintenance and upgrades more convenient. When a module malfunctions, it can be quickly disassembled and replaced, reducing maintenance costs and downtime, and improving production efficiency. Furthermore, treating waste gas through the tail gas catalytic system not only reduces environmental pollution but also enables the recycling of some resources, aligning with the concept of sustainable development. Attached Figure Description

[0020] Figure 1 A perspective view of a chemical waste gas treatment device is provided for this utility model;

[0021] Figure 2 This utility model presents another perspective view of a chemical waste gas treatment device;

[0022] Figure 3 A three-dimensional view of a valve for a chemical waste gas treatment device is provided for this utility model;

[0023] Figure 4 This utility model provides a sectional perspective view of a valve in a chemical waste gas treatment device;

[0024] Figure 5 A large perspective view of the connection structure of a chemical waste gas treatment device is provided for this utility model.

[0025] Figure 6 This utility model provides a three-dimensional cross-sectional view of a ball valve in a chemical waste gas treatment device.

[0026] Legend: 1. First support; 2. Compressor; 21. Inlet pipe; 22. First supply pipe; 3. First three-way valve mechanism; 301. Motor; 302. Support plate; 303. Second support; 304. Valve casing; 305. Rotating groove; 306. Ball valve; 4. Two-way connecting pipe; 41. Heavy component recovery tower connecting pipe; 42. Residue loading vapor phase line; 43. Third support; 5. First vacuum power pump; 6. Odor treatment pipeline; 61. Second vacuum power pump; 62. Second three-way valve mechanism; 63. 20,000-ton unit tail gas catalytic system; 64. Technical upgrade unit tail gas catalytic system. Detailed Implementation

[0027] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described below with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0028] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed in the following specification.

[0029] Please see attached Figure 1 -Appendix Figure 6 As shown, this utility model provides a technical solution: a chemical waste gas treatment device, comprising: a first support 1, a compressor 2 fixedly connected to the top of the first support 1, an air inlet pipe 21 fixedly connected to the air inlet of the compressor 2, a first air supply pipe 22 fixedly connected to the output end of the compressor 2, and a first three-way valve mechanism 3 fixedly connected to one end of the first air supply pipe 22; the first three-way valve mechanism 3 includes a motor 301, a second support 303 fixedly connected to the bottom of the motor 301, and the chemical waste gas treatment device includes the first support 1, with the compressor 2 fixedly connected to the top of the first support 1, the first support 1 providing stable support for the compressor 2, ensuring that the compressor 2 maintains stability during operation. Stable operation is ensured to prevent shaking or displacement from affecting the intake and pressurization of waste gas, thus guaranteeing stable operation at the beginning of the entire waste gas treatment process. The air inlet of the compressor 2 is fixedly connected to the air inlet pipe 21, which accurately introduces the chemical waste gas into the compressor 2, allowing the waste gas to be captured by the compressor 2 in a concentrated and efficient manner, preparing for subsequent pressurization treatment. The output end of the compressor 2 is fixedly connected to the first air supply pipe 22. After the compressor 2 pressurizes the waste gas, the first air supply pipe 22 stably and quickly transmits the pressurized waste gas to the next treatment stage, namely the first three-way valve mechanism 3, ensuring smooth flow of waste gas within the device and laying the foundation for subsequent waste gas diversion treatment.

[0030] Please see attached Figure 1 -Appendix Figure 6As shown, a support plate 302 is fixedly connected to the bottom of the second bracket 303, a ball valve 306 is fixedly connected to the output end of the motor 301, and a first three-way valve mechanism 3 is fixedly connected to one end of the first air supply pipe 22. The first three-way valve mechanism 3 plays a key role in airflow distribution in the whole device. It can flexibly guide the waste gas to different treatment paths according to the actual waste gas treatment needs, improving the adaptability of the device to various waste gas treatment scenarios. The first three-way valve mechanism 3 includes a motor 301, which provides power for the rotation of the ball valve 306. Its precise speed control capability ensures that the ball valve 306 can quickly and accurately adjust its angle to achieve precise control of the waste gas airflow direction. The second bracket 303 is fixedly connected to the bottom of the motor 301. The second bracket 303 stably supports the motor 301, keeping it stable during operation and avoiding the influence of motor vibration and other factors on the rotation accuracy of the ball valve 306, thereby ensuring the accuracy of waste gas diversion.

[0031] Please see attached Figure 1 -Appendix Figure 6 As shown, the outer wall of the ball valve 306 is fitted with a valve tube housing 304. The valve tube housing 304 provides protection and support for the ball valve 306, while ensuring that the exhaust gas does not leak when flowing through the valve, maintaining the pressure stability inside the device, and ensuring the sealing and safety of the exhaust gas treatment process.

[0032] Please see attached Figure 1 -Appendix Figure 6 As shown, the inner wall of the valve tube housing 304 is provided with a rotating groove 305, and the outer wall of the ball valve 306 is fitted with the valve tube housing 304. The inner wall of the valve tube housing 304 is provided with a rotating groove 305. The rotating groove 305 is in close cooperation with the ball valve 306, providing a stable track for the rotation of the ball valve 306, making the ball valve 306 more stable and flexible during rotation, and further improving the accuracy of controlling the direction of exhaust gas flow.

[0033] Please see attached Figure 1 -Appendix Figure 6 As shown, a bidirectional connecting pipe 4 is fixedly connected to the outer wall of the valve pipe housing 304. The bidirectional connecting pipe 4 serves as a key channel for waste gas diversion. It can guide the waste gas flowing out of the valve pipe housing 304 to the heavy component recovery tower connecting pipe 41 or the residue loading gas phase line 42 respectively according to the control of the ball valve 306. This realizes the classified treatment of waste gas from different sources and improves the pertinence and effectiveness of waste gas treatment.

[0034] Please see attached Figure 1 -Appendix Figure 6As shown, the outer wall of the bidirectional connecting pipe 4 is fixedly connected to the heavy component recovery tower connecting pipe 41, and the outer wall of the bidirectional connecting pipe 4 is fixedly connected to the residue loading vapor line 42. The outer wall of the bidirectional connecting pipe 4 is fixedly connected to the heavy component recovery tower connecting pipe 41. The heavy component recovery tower connecting pipe 41 accurately introduces the waste gas into the heavy component recovery tower, so that the heavy components in the waste gas can be effectively separated and recovered in the recovery tower, reducing the concentration of pollutants in the waste gas and realizing resource reuse. The outer wall of the bidirectional connecting pipe 4 is fixedly connected to the residue loading vapor line 42, which provides a dedicated treatment channel for the waste gas generated during the residue loading process, ensuring that the waste gas can be collected and treated in a timely manner, reducing environmental pollution.

[0035] Please see attached Figure 1 -Appendix Figure 6 As shown, a third support 43 is fixedly connected to the outer wall of the residual loading vapor line 42. The bottom of the third support 43 is connected to the ground. The third support 43 provides a stable support for the residual loading vapor line 42, ensuring that it will not be deformed or damaged due to external forces during operation. This ensures the stable flow of waste gas within the residual loading vapor line 42, creating favorable conditions for subsequent waste gas treatment. The connection of the bottom of the third support 43 to the ground enhances the stability of the entire residual loading vapor line 42 system, enabling it to adapt to different working environments and ensuring long-term stable operation of the device.

[0036] Please see attached Figure 1 -Appendix Figure 6 As shown, the outer wall of the valve pipe housing 304 is fixedly connected to the air inlet of the first vacuum power pump 5, and the outer wall of the valve pipe housing 304 is fixedly connected to the odor treatment pipe 6. The first vacuum power pump 5 uses self-generated compressed air as a power source. By connecting with the valve pipe housing 304, it extracts the gas in the residual loading vapor phase line 42, effectively reducing the pressure in this area. This allows the exhaust gas generated during the residual loading process to flow more smoothly, improving the efficiency of exhaust gas collection, reducing the risk of exhaust gas leakage, and further ensuring environmental safety. The odor treatment pipe 6 provides a dedicated channel for treating odor components in the exhaust gas, enabling the odor-containing exhaust gas to be centrally transported to the subsequent treatment unit, avoiding the adverse effects of odor diffusion on the surrounding environment and personnel.

[0037] Please see attached Figure 1 -Appendix Figure 6As shown, one end of the odor treatment pipeline 6 is fixedly connected to a second vacuum power pump 61, and the output end of the second vacuum power pump 61 is fixedly connected to a second three-way valve mechanism 62. The second vacuum power pump 61 rapidly and efficiently transports the exhaust gas drawn from the odor treatment pipeline 6 to the second three-way valve mechanism 62, ensuring rapid transmission of the exhaust gas in the odor treatment process and improving the timeliness and efficiency of odor treatment. The output end of the second vacuum power pump 61 is fixedly connected to the second three-way valve mechanism 62, which plays a key regulatory role in the entire odor treatment and exhaust gas treatment process. It can flexibly control the flow direction of the exhaust gas according to the operating status of the exhaust gas catalytic system 63 of the 20,000-ton unit and the exhaust gas catalytic system 64 of the technical renovation unit, as well as the exhaust gas treatment requirements, ensuring that the exhaust gas can be treated optimally and improving the operating efficiency and treatment effect of the entire exhaust gas treatment device.

[0038] Please see attached Figure 1 -Appendix Figure 6 As shown, one end of the second three-way valve mechanism 62 is fixedly connected to the 20,000-ton unit's tail gas catalytic system 63. The outer wall of the second three-way valve mechanism 62 is also fixedly connected to another second three-way valve mechanism 62. The outer wall of the second three-way valve mechanism 62 is also fixedly connected to the technical upgrade unit's tail gas catalytic system 64. One end of the second three-way valve mechanism 62 is fixedly connected to the 20,000-ton unit's tail gas catalytic system 63. When the 20,000-ton unit's tail gas catalytic system 63 is operating normally and has sufficient processing capacity, the second three-way valve mechanism 62 guides the waste gas to this system, causing the waste gas to undergo a chemical reaction under the action of the catalyst, thus eliminating harmful substances. Components such as phthalic anhydride are converted into harmless or less harmful substances, achieving efficient and stable exhaust gas purification, greatly reducing the degree of pollution of the environment by the exhaust gas. The outer wall of the second three-way valve mechanism 62 is fixedly connected to the exhaust gas catalytic system 64 of the technical upgrade unit. When the exhaust gas catalytic system 63 of the 20,000-ton unit is under maintenance or its processing capacity is saturated, the second three-way valve mechanism 62 can switch the exhaust gas to the exhaust gas catalytic system 64 of the technical upgrade unit in a timely manner, ensuring the continuity of exhaust gas treatment work and ensuring that the exhaust gas can be properly treated under various conditions, further improving the reliability and adaptability of the unit.

[0039] Working principle: After the industrial waste gas treatment device is started, the chemical waste gas is drawn into the compressor 2 through the inlet pipe 21. The compressor 2 pressurizes the waste gas, and the pressurized waste gas is transmitted to the first three-way valve mechanism 3 through the first air supply pipe 22. In the first three-way valve mechanism 3, the motor 301 is turned on, and its output end drives the ball valve 306 to rotate. The ball valve 306 is located inside the valve pipe housing 304. The rotation groove 305 on the inner wall of the valve pipe housing 304 provides support and guidance for the rotation of the ball valve 306. When the motor 301 rotates according to the preset command, the ball valve 306... 06. Precise angle adjustment enables control of airflow direction. To direct waste gas to the heavy component recovery tower, motor 301 controls ball valve 306, allowing waste gas to flow from valve housing 304 through bidirectional connecting pipe 4 and heavy component recovery tower connecting pipe 41 into the heavy component recovery tower, where heavy components in the waste gas are recovered. If waste gas generated during residue loading needs to be treated, ball valve 306 rotates to another angle, allowing waste gas to enter the residue loading vapor phase line 42 through bidirectional connecting pipe 4. At this time, the first vacuum power pump 5 starts working, using its self-generated compressed air as a power source. Its air inlet is fixedly connected to the outer wall of the valve pipe housing 304, drawing gas from the gas phase line 42 of the residue loading process, reducing the pressure in that area, and promoting smoother flow of exhaust gas generated during residue loading. Simultaneously, one end of the odor control pipe 6 is connected to the valve pipe housing 304, and the other end is connected to the second vacuum power pump 61. After the second vacuum power pump 61 is turned on, it transports the exhaust gas drawn from the odor control pipe 6 to the second three-way valve mechanism 62. At the second three-way valve mechanism 62, according to the 20,000-ton unit tail gas catalytic system 63 and the technical upgrade unit tail gas catalytic system… The operating status of system 64 and the demand for waste gas treatment are used to control the flow of waste gas through the second three-way valve mechanism 62. If the tail gas catalytic system 63 of the 20,000-ton unit is operating normally and has sufficient treatment capacity, the waste gas will be directed to this system. If the system is under maintenance or its treatment capacity is saturated, the waste gas will be switched to the tail gas catalytic system 64 of the technical upgrade unit through the second three-way valve mechanism 62. In the tail gas catalytic system, the waste gas undergoes a chemical reaction under the action of the catalyst, and harmful components such as phthalic anhydride are converted into harmless or less harmful substances, ultimately achieving emission standards.

[0040] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution of the present utility model shall still fall within the protection scope of the technical solution of the present utility model.

Claims

1. A chemical waste gas treatment device, characterized in that, include: The first support (1) is fixedly connected to the top of the first support (1), and the air inlet of the compressor (2) is fixedly connected to the air inlet pipe (21). The output end of the compressor (2) is fixedly connected to the first air supply pipe (22), and one end of the first air supply pipe (22) is fixedly connected to the first three-way valve mechanism (3). The first three-way valve mechanism (3) includes a motor (301), and a second bracket (303) is fixedly connected to the bottom of the motor (301).

2. The chemical waste gas treatment device according to claim 1, characterized in that: The bottom of the second bracket (303) is fixedly connected to a support plate (302), and the output end of the motor (301) is fixedly connected to a ball valve (306).

3. The chemical waste gas treatment device according to claim 2, characterized in that: The outer wall of the ball valve (306) is fitted with a valve pipe housing (304).

4. The chemical waste gas treatment device according to claim 3, characterized in that: The inner wall of the valve tube housing (304) is provided with a rotating groove (305).

5. The chemical waste gas treatment device according to claim 4, characterized in that: The outer wall of the valve tube housing (304) is fixedly connected to a bidirectional connecting pipe (4).

6. The chemical waste gas treatment device according to claim 5, characterized in that: The outer wall of the bidirectional connecting pipe (4) is fixedly connected to the heavy component recovery tower connecting pipe (41), and the outer wall of the bidirectional connecting pipe (4) is fixedly connected to the residue loading vapor line (42).

7. The chemical waste gas treatment device according to claim 6, characterized in that: The outer wall of the residue loading vapor phase line (42) is fixedly connected to a third bracket (43), and the bottom of the third bracket (43) is connected to the ground.

8. A chemical waste gas treatment device according to claim 6, characterized in that: The outer wall of the valve tube housing (304) is fixedly connected to the air inlet of the first vacuum power pump (5), and the outer wall of the valve tube housing (304) is fixedly connected to the odor control pipe (6).

9. A chemical waste gas treatment device according to claim 8, characterized in that: One end of the odor control pipe (6) is fixedly connected to a second vacuum power pump (61), and the output end of the second vacuum power pump (61) is fixedly connected to a second three-way valve mechanism (62).

10. A chemical waste gas treatment device according to claim 9, characterized in that: One end of the second three-way valve mechanism (62) is fixedly connected to the tail gas catalytic system (63) of the 20,000-ton unit. The outer wall of the second three-way valve mechanism (62) is fixedly connected to the tail gas catalytic system (64) of the technical renovation unit.

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