Chemical waste gas treatment device

Abstract

The utility model discloses a chemical waste gas treatment device and belongs to the technical field of waste gas treatment. Comprising a mixing tank, a buffer tank, an RTO fan, an RTO reactor, a combustor and an exhaust funnel, a gas inlet pipeline is arranged on the mixing tank, and a natural gas pipeline is arranged on the combustor; the mixing tank, the buffer tank and the RTO fan are connected through a pipeline; the RTO reactors are connected through a pipeline; the exhaust cylinders are connected through a pipeline; a dilution pipeline is arranged on the pipeline between the buffer tank and the RTO fan, one end, far away from the pipeline between the buffer tank and the RTO fan, of the dilution pipeline is arranged on the pipeline between the RTO reactor and the exhaust funnel, and an activated carbon adsorption tank is arranged on the dilution pipeline; a valve A is arranged on the pipeline between the buffer tank and the RTO fan, and the valve A is positioned at one end, far away from the buffer tank and the dilution pipeline, of the pipeline; the utility model provides a chemical waste gas treatment device which solves the problems that an existing chemical waste gas treatment device cannot treat waste gas with large air volume fluctuation and high VOCs (volatile organic compounds) concentration for a long time and is high in energy consumption.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the field of waste gas treatment, especially relate to a chemical waste gas treatment device. BACKGROUND

[0002] In the chemical production process, a large amount of waste gas will be produced, and these waste gases usually contain a large amount of volatile organic compounds (VOCs), particulate matter and other harmful substances. If they are not effectively treated and directly discharged into the atmosphere, they will have a serious impact on the environment and human health.

[0003] Traditional chemical waste gas treatment devices usually use a single treatment method, such as adsorption, condensation, combustion, etc. These methods have many shortcomings when dealing with waste gas with large fluctuation in air volume and high VOCs concentration. For example, although the adsorption method can effectively remove harmful substances in waste gas, the adsorbent is easy to saturate and needs to be replaced frequently, increasing the operating cost; the condensation method needs to consume a large amount of energy to reduce the waste gas temperature, and the removal effect of low-concentration VOCs is not good; the combustion method may produce secondary pollution, and the treatment effect for waste gas with large fluctuation in air volume is not good SUMMARY

[0004] The utility model aims at overcoming the deficiency in the prior art, providing a chemical waste gas treatment device, solving the problem that the existing chemical waste gas treatment device cannot treat waste gas with large fluctuation in air volume and high VOCs concentration for a long time, and the problem of high energy consumption.

[0005] To achieve the above-mentioned purpose, the utility model adopts the technical scheme of a chemical waste gas treatment device, which comprises a mixing tank, a buffer tank, an RTO fan, an RTO reactor, a burner, and an exhaust pipe, an air inlet pipeline for introducing waste gas into the mixing tank is arranged on the mixing tank, and a natural gas pipeline for introducing natural gas into the burner is arranged on the burner;

[0006] The mixing tank, the buffer tank, the RTO fan, the RTO reactor and the exhaust pipe are connected by pipelines;

[0007] A dilution pipeline is arranged on the pipeline between the buffer tank and the RTO fan, the end of the dilution pipeline away from the pipeline between the buffer tank and the RTO fan is arranged on the pipeline between the RTO reactor and the exhaust pipe, and an activated carbon adsorption tank for diluting waste gas is arranged on the dilution pipeline;

[0008] A valve A is arranged on the pipeline between the buffer tank and the RTO fan, and the valve A is located at the end of the pipeline away from the buffer tank and the dilution pipeline.

[0009] Optionally, the RTO reactor is provided with a waste heat pipeline for outputting heat source, a heat conducting oil heater is arranged at the end of the waste heat pipeline away from the RTO reactor, the heat conducting oil heater is connected with the exhaust cylinder through a pipeline, and two transportation pipelines for circulating production of heat conducting oil are arranged on the heat conducting oil heater.

[0010] Optionally, a valve B for closing the waste heat pipeline is arranged on the waste heat pipeline, and a valve C is arranged on the pipeline between the heat conducting oil heater and the exhaust cylinder.

[0011] Optionally, an emergency discharge pipeline for improving safety performance is arranged on the pipeline between the buffer tank and the valve A, and a valve D is arranged on the emergency discharge pipeline.

[0012] Optionally, a fresh air pipeline for transporting fresh air is arranged on the pipeline between the valve A and the RTO fan, and a valve E is arranged on the fresh air pipeline.

[0013] Optionally, the valve A, the valve B, the valve C, the valve D and the valve E are all solenoid valves, the valve A, the valve B and the valve C are kept open, and the valve D and the valve E are kept closed.

[0014] Optionally, a combustion supporting fan for improving combustion stability of the burner is arranged on the burner.

[0015] Optionally, the waste gas introduced into the air inlet pipeline is waste gas containing high-concentration VOCs.

[0016] Compared with the prior art, the chemical waste gas contains multiple components, the waste gas is first sent into the mixing tank, in the mixing tank, different waste gases are mixed together, then the waste gas is stored and buffered in the buffer tank, then a part of the waste gas is directly purified and filtered in the activated carbon adsorption tank and is discharged through the exhaust cylinder, and another part of the waste gas is stably sent into the RTO reactor and is burned through the burner, the waste gas contacts the flame generated by the burner at high temperature, an oxidation reaction occurs, organic substances are decomposed into harmless carbon dioxide and water vapor, and finally the waste gas meeting the standard is discharged through the exhaust cylinder. BRIEF DESCRIPTION OF DRAWINGS

[0017] The utility model is further explained in connection with the drawings and examples.

[0018] Figure 1 is the structure schematic diagram of preferred embodiment of the utility model;

[0019] Wherein, 1, mixing tank; 2, buffer tank; 3, RTO fan; 4, RTO reactor; 5, burner; 6, exhaust cylinder; 7, gas inlet pipeline; 8, natural gas pipeline; 9, dilution pipeline; 10, activated carbon adsorption tank; 11, valve A; 12, waste heat pipeline; 13, heat conducting oil heater; 14, transport pipeline; 15, valve B; 16, valve C; 17, emergency discharge pipeline; 18, valve D; 19, new air pipeline; 20, valve E; 21, combustion fan. DETAILED DESCRIPTION

[0020] The utility model will be explained in further detail in combination with the drawings and embodiments, these drawings are all simplified schematic diagram, only with the schematic way the basic structure of the utility model is explained, therefore it shows only the structure related to the utility model.

[0021] It should be noted that if the embodiment involves directional indications (such as up, down, bottom, top, etc.), the directional indications are only used to explain the relative position relationship, movement, etc. between the components in a certain posture, and if the specific posture changes, the directional indications will also change accordingly. The terms "first" and "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Therefore, the features limited by "first" and "second" can explicitly or implicitly include one or more features. Unless otherwise specified and limited, the terms "set", "connected", "connected" should be broadly understood, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be directly connected, or indirectly connected through an intermediate medium, or it can be connected inside two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances. Example one

[0022] As shown in Figure 1 A chemical waste gas treatment device, comprising a mixing tank 1, a buffer tank 2, an RTO fan 3, an RTO reactor 4, a burner 5, an exhaust cylinder 6, the mixing tank 1 is provided with a gas inlet pipeline 7 for introducing waste gas into the mixing tank 1, the burner 5 is provided with a natural gas pipeline 8 for introducing natural gas into the burner 5;

[0023] The mixing tank 1 and the buffer tank 2, the buffer tank 2 and the RTO fan 3, the RTO fan 3 and the RTO reactor 4, the RTO reactor 4 and the exhaust cylinder 6 are connected by pipeline;

[0024] A dilution pipe 9 is arranged on the pipe between the buffer tank 2 and the RTO fan 3, and the dilution pipe 9 is arranged on the pipe between the RTO reactor 4 and the exhaust cylinder 6 away from the end of the pipe between the buffer tank 2 and the RTO fan 3, and the dilution pipe 9 is provided with an activated carbon adsorption tank 10 for diluting the exhaust gas.

[0025] A valve A11 is arranged on the pipe between the buffer tank 2 and the RTO fan 3, and the valve A11 is located at the end of the pipe away from the buffer tank 2 and the dilution pipe 9.

[0026] In the embodiment, the exhaust gas containing multiple components is first sent into the mixing tank 1 through the gas inlet pipe 7, and in the mixing tank 1, different exhaust gases are mixed together to ensure that they can uniformly enter the subsequent processing steps, and then the exhaust gas enters the buffer tank 2, which can temporarily store the exhaust gas to smoothly supply the subsequent processing equipment when needed, and also can help balance the pressure of the system to ensure that the exhaust gas can stably flow, and then part of the exhaust gas enters the activated carbon adsorption tank 10 to directly purify and filter the exhaust gas and is discharged through the exhaust cylinder 6, so that the exhaust gas is diluted to the appropriate processing conditions before entering the RTO reactor 4, which helps to stabilize the operation of the RTO reactor 4 and improve the processing efficiency, and the other part of the diluted exhaust gas enters the RTO reactor 4, and the RTO reactor 4 uses the high-temperature flame generated by the burner 5 to decompose the organic matter in the exhaust gas into harmless carbon dioxide and water vapor, which is finally discharged through the exhaust cylinder 6, and the RTO fan 3 is used to provide power for the flow of the exhaust gas, so that the exhaust gas with large air volume fluctuation and high VOCs concentration can be efficiently treated. Embodiment two

[0027] As shown in Figure 1 the embodiment one, a waste heat pipe 12 for outputting heat source is arranged on the RTO reactor 4, the waste heat pipe 12 is arranged with a heat conducting oil heater 13 away from the end of the RTO reactor 4, the heat conducting oil heater 13 is connected with the pipe between the exhaust cylinder 6, and the heat conducting oil heater 13 is provided with two transportation pipes 14 for circulating production of heat conducting oil. The heat conducting oil heater 13 can produce heating oil by using the available heat source generated by the RTO reactor 4, which can save energy consumption.

[0028] As shown in Figure 1 the waste heat pipe 12 is provided with a valve B15 for closing the waste heat pipe 12, and the pipe between the heat conducting oil heater 13 and the exhaust cylinder 6 is provided with a valve C16. The valve B15 and the valve C16 can completely close the waste heat utilization function of the RTO reactor 4.

[0029] As shown in Figure 1As shown, an emergency discharge pipe 17 is installed on the pipeline between the buffer tank 2 and the valve A11 to improve safety performance. A valve D18 is installed on the emergency discharge pipe 17. Opening the valve D18 can discharge the exhaust gas in the pipeline in an emergency, preventing the buffer tank 2 from overloading and causing accidents.

[0030] like Figure 1 As shown, a fresh air duct 19 for transporting fresh air is provided on the duct between valve A11 and RTO blower 3, and a valve E20 is provided on the fresh air duct 19. During the exhaust gas treatment process, fresh air is sometimes required to adjust the temperature and oxygen content in the duct and improve the dilution effect.

[0031] like Figure 1 As shown, valves A11, B15, C16, D18, and E20 are all solenoid valves. Valves A11, B15, and C16 are normally open, while valves D18 and E20 are normally closed. Solenoid valves can more conveniently control these valves.

[0032] like Figure 1 As shown, the burner 5 is provided with a combustion-supporting blower 21 for improving the combustion stability of the burner 5. The combustion-supporting blower 21 can keep the natural gas stably delivered to the inside of the burner 5, providing a stable and continuous output capacity for the flame ejected by the burner 5.

[0033] In this embodiment, the RTO reactor 4 generates a large amount of usable heat during operation. This heat is collected by the waste heat pipe 12 and fed into the thermal oil heater 13. The thermal oil heater 13 produces a large amount of heated thermal oil, which can be used to reduce production costs and energy loss, thereby improving energy utilization. Furthermore, the pipes used to connect the various structures in this embodiment are stainless steel pipes, and are all sealed to each structure.

[0034] Working principle: Chemical waste gas contains multiple components. These waste gases are first sent into the mixing tank 1. In the mixing tank 1, different waste gases are mixed together. Then, the waste gas enters the buffer tank 2 for storage and buffering. Then, part of the waste gas enters the activated carbon adsorption tank 10 for direct purification and filtration and is discharged through the exhaust pipe 6. The other part is smoothly sent to the RTO reactor 4 and burned by the burner 5. The waste gas comes into contact with the flame generated by the burner 5 at high temperature, and an oxidation reaction occurs. The organic matter will be decomposed into harmless carbon dioxide and water vapor. Finally, the waste gas that meets the standards is discharged through the exhaust pipe 6.

[0035] The above is based on the ideal embodiment of the present application, through the above description, relevant personnel can make various changes and modifications without deviating from the technical idea of the present application. The technical scope of the present application is not limited to the content of the specification, and the technical scope must be determined according to the scope of claims.

Claims

1. A chemical waste gas treatment device, characterized by: The system comprises a mixing tank (1), a buffer tank (2), an RTO blower (3), an RTO reactor (4), a burner (5), and an exhaust pipe (6); the mixing tank (1) is provided with an air intake pipe (7) for introducing exhaust gas into the mixing tank (1); the burner (5) is provided with a natural gas pipe (8) for introducing natural gas into the burner (5); The mixing tank (1) and the buffer tank (2), the buffer tank (2) and the RTO fan (3), the RTO fan (3) and the RTO reactor (4), and the RTO reactor (4) and the exhaust pipe (6) are connected via pipelines; A dilution pipe (9) is provided on the pipe between the buffer tank (2) and the RTO blower (3); one end of the dilution pipe (9) away from the pipe between the buffer tank (2) and the RTO blower (3) is provided on the pipe between the RTO reactor (4) and the exhaust pipe (6); and an activated carbon adsorption tank (10) for diluting the exhaust gas is provided on the dilution pipe (9); A valve A (11) is provided on the pipeline between the buffer tank (2) and the RTO blower (3), and the valve A (11) is located at an end of the pipeline away from the buffer tank (2) and the dilution pipeline (9).

2. The chemical waste gas treatment device according to claim 1, characterized in that: The RTO reactor (4) is provided with a waste heat pipe (12) for outputting a heat source. A thermal oil heater (13) is provided at one end of the waste heat pipe (12) away from the RTO reactor (4). The thermal oil heater (13) is connected to the exhaust pipe (6) via a pipe. The thermal oil heater (13) is provided with two transport pipes (14) for circulating the production of thermal oil.

3. The chemical waste gas treatment device according to claim 2, characterized in that: The waste heat pipe (12) is provided with a valve B (15) for closing the waste heat pipe (12), and the pipe between the thermal oil heater (13) and the exhaust pipe (6) is provided with a valve C (16).

4. The chemical waste gas treatment device according to claim 1, characterized in that: An emergency discharge pipe (17) for improving safety performance is provided on the pipe between the buffer tank (2) and the valve A (11), and a valve D (18) is provided on the emergency discharge pipe (17).

5. The chemical waste gas treatment device according to claim 1, characterized in that: A new air pipeline (19) for transporting new air is provided on the pipeline between the valve A (11) and the RTO blower (3), and a valve E (20) is provided on the new air pipeline (19).

6. The chemical waste gas treatment device according to claim 5, characterized in that: The valve A (11), valve B (15), valve C (16), valve D (18), and valve E (20) are all solenoid valves. The valve A (11), valve B (15), and valve C (16) are kept normally open, and the valve D (18) and valve E (20) are kept normally closed.

7. The chemical waste gas treatment device according to claim 1, characterized in that: The burner (5) is provided with a combustion-supporting blower (21) for improving the combustion stability of the burner (5).

8. The chemical waste gas treatment device according to claim 1, characterized in that: The exhaust gas introduced into the air inlet pipe (7) is exhaust gas containing high concentrations of VOCs.

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