A high-efficient and convenient VOC waste gas treatment device

Abstract

The utility model discloses a kind of efficient VOC waste gas treatment device of convenient including air inlet pipe, fan being located at the air inlet pipe import, heat exchanger, pipeline one, waste gas compression bin, multi-zone incineration bin, natural gas pipe, pipeline two, exhaust pipe;The air inlet pipe is communicated with heat exchanger, heat exchanger is communicated with waste gas compression bin by pipeline one;The waste gas compression bin is communicated with multi-zone incineration bin;Multi-zone incineration bin is communicated with heat exchanger by pipeline two;The heat exchanger is communicated with exhaust pipe;Multi-zone incineration bin includes preheating zone, main combustion zone and post-combustion zone sequentially communicated;The preheating zone, main combustion zone and post-combustion zone are respectively connected with natural gas pipe;Multi-zone incineration bin of the utility model is controlled by gradient temperature, realizes the accurate treatment to different boiling point VOC;And using heat exchanger utilizes high-temperature waste gas after incineration preheats waste gas to be handled, significantly improves processing efficiency and reduces energy consumption, simple and compact structure, it is convenient to maintain.

Description

Technical Field

[0001] This utility model relates to the field of waste gas treatment, specifically to a highly efficient and convenient VOC waste gas treatment device. Background Technology

[0002] With the expansion of production scale and the increase in process complexity in the chemical industry, the emitted volatile organic compounds (VOCs) are characterized by high concentrations, multiple components, and difficulty in degradation. Typical chemical waste gases contain pollutants such as benzene, halogenated hydrocarbons, ketones, and aldehydes, which have vastly different boiling points. Traditional waste gas treatment technologies include adsorption, catalytic combustion, and direct thermal combustion, but these suffer from high costs, high energy consumption, and incomplete degradation. Summary of the Invention

[0003] Purpose of the utility model: This utility model provides a VOC waste gas treatment device that is low in energy consumption, highly efficient and convenient.

[0004] Technical Solution: This utility model provides a highly efficient and convenient VOC waste gas treatment device, including an inlet pipe, a fan located at the inlet of the inlet pipe, a heat exchanger, a first pipeline, a waste gas compression chamber, a multi-zone incineration chamber, a natural gas pipeline, a second pipeline, and an exhaust pipe. The inlet pipe is connected to the heat exchanger, and the heat exchanger is connected to the waste gas compression chamber via the first pipeline. The waste gas compression chamber is connected to the multi-zone incineration chamber. The multi-zone incineration chamber is connected to the heat exchanger via the second pipeline. The heat exchanger is connected to the exhaust pipe. The multi-zone incineration chamber includes a preheating zone, a main combustion zone, and an aftercombustion zone connected in sequence. The preheating zone, main combustion zone, and aftercombustion zone are each connected to a natural gas pipeline.

[0005] Furthermore, the temperature of the preheating zone is 300-400℃; the temperature of the main combustion zone is 500-600℃; and the temperature of the afterburning zone is 800-850℃.

[0006] Furthermore, the exhaust pipe is provided with a ceramic fiber filter layer.

[0007] Furthermore, the ceramic fiber filter layer is connected to the exhaust pipe via a snap fastener.

[0008] Furthermore, the natural gas pipeline is connected to a safety valve.

[0009] Furthermore, the heat exchanger is a plate heat exchanger.

[0010] Compared to existing technologies, the advantages of this invention are as follows: This invention preferentially decomposes low-boiling-point VOCs in the waste gas, such as formaldehyde and acetone, in the preheating zone, avoiding their ineffective retention in the high-temperature zone and thus reducing fuel consumption; it centrally treats medium-boiling-point VOCs, such as benzene and some halogenated alkenes, in the main combustion zone; and finally, it thoroughly oxidizes high-boiling-point and difficult-to-degrade pollutants, such as carbon tetrachloride and polychlorinated biphenyls, in the afterburning zone. This invention significantly improves waste gas treatment efficiency and reduces energy consumption by setting up multi-zone incineration chambers. Furthermore, the high-temperature waste gas generated after incineration preheats the waste gas to be treated through a heat exchanger, further reducing natural gas consumption. This invention is suitable for complex VOC waste gases generated in industries such as chemical, pharmaceutical, and coating; in addition, this invention has a simple and compact structure, making it easy to maintain. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the structure of this utility model;

[0012] Figure 2 A schematic diagram of the structure of the heat exchanger into which the waste gas to be treated enters;

[0013] Figure 3 This is a schematic diagram of the structure for treating high-temperature harmless gas to enter the heat exchanger.

[0014] List of labels in the attached diagram: 1-Intake pipe, 2-Fan, 3-Heat exchanger, 4-Pipeline 1, 5-Exhaust gas compression chamber, 6-Multi-zone incineration chamber, 601-Preheating zone, 602-Main combustion zone, 603-Afterburning zone, 7-Natural gas pipe, 701-Natural gas pipe 1, 702-Natural gas pipe 2, 703-Natural gas pipe 3, 8-Pipeline 2, 9-Exhaust pipe. Detailed Implementation

[0015] The present invention will be further illustrated below with reference to the accompanying drawings and specific embodiments. It should be understood that the following specific embodiments are for illustrative purposes only and are not intended to limit the scope of the invention.

[0016] like Figure 1-3 As shown, this utility model includes an intake pipe 1, a fan 2 located at the inlet of the intake pipe 1, a heat exchanger 3, a first pipe 4, an exhaust gas compression chamber 5, a multi-zone combustion chamber 6, a natural gas pipe 7, a second pipe 8, and an exhaust pipe 9. The intake pipe 1 is connected to the heat exchanger 3, and the heat exchanger 3 is connected to the exhaust gas compression chamber 5 through the first pipe 4. The exhaust gas compression chamber 5 is connected to the multi-zone combustion chamber 6. The multi-zone combustion chamber 6 is connected to the heat exchanger 3 through the second pipe 8. The heat exchanger 3 is connected to the exhaust pipe 9. The multi-zone combustion chamber 6 includes a preheating zone 601, a main combustion zone 602, and an afterburning zone 603 connected in sequence. The preheating zone 601, the main combustion zone 602, and the afterburning zone 603 are respectively connected to natural gas pipes.

[0017] Specifically, the waste gas to be treated enters the device through inlet pipe 1. A fan 2 is installed at the inlet of inlet pipe 1. When fan 2 starts, it generates negative pressure, drawing the waste gas from the waste gas source and sending it to subsequent treatment stages. The waste gas first enters heat exchanger 3, where the residual heat from the high-temperature flue gas after incineration is used to preheat the waste gas, reducing system energy consumption. Heat exchanger 3 is a plate heat exchanger, which maximizes the transfer of heat from the high-temperature flue gas to the waste gas to be treated.

[0018] After exiting the heat exchanger 3, the exhaust gas enters the exhaust gas compression chamber 5 through pipe 4. The exhaust gas compression chamber 5 regulates the pressure and buffers the exhaust gas. When the exhaust gas flow fluctuates, the compression chamber 5 can store excess exhaust gas or supplement insufficient flow, ensuring a stable flow of exhaust gas entering the incineration system. Simultaneously, the compression process increases the exhaust gas pressure, providing sufficient power for subsequent pipeline transport and incineration, ensuring the smooth passage of the exhaust gas through each treatment stage.

[0019] The exhaust gas enters the preheating zone 601 of the multi-zone incineration chamber 6 from the exhaust gas compression chamber 5. Natural gas is supplied through the natural gas pipeline 701 to provide heat for combustion, and the temperature is controlled at 300-400℃, causing low-boiling-point VOCs, such as formaldehyde and acetone, to vaporize and undergo preliminary decomposition. At this temperature, low-boiling-point VOCs are easily volatilized and undergo cracking reactions, generating smaller gaseous molecules, reducing the load on subsequent treatment. The design of the preheating zone 601 avoids the ineffective retention of low-boiling-point VOCs in the high-temperature zone and prevents them from generating additional energy consumption due to excessive oxidation at high temperatures.

[0020] The preheated exhaust gas enters the main combustion zone 602, where the temperature rises to 500-600℃. This stage focuses on treating medium-boiling-point VOCs, such as benzene and some halogenated hydrocarbons. Natural gas is supplied to the main combustion zone 602 via natural gas pipeline 702 to provide heat for combustion, ensuring complete oxidation of organic matter to produce carbon dioxide and water. Simultaneously, the high-temperature environment of the main combustion zone 602 promotes the separation of halogens from organic groups in halogenated hydrocarbons, reducing their toxicity. The temperature control of the main combustion zone 602, combined with the natural gas-assisted combustion design, not only improves combustion efficiency but also suppresses NOx formation by controlling combustion conditions.

[0021] The exhaust gas from the main combustion zone 602 enters the after-combustion zone 603, where the temperature is further increased to 800-850℃. This stage targets high-boiling-point, recalcitrant organic compounds, such as carbon tetrachloride and polychlorinated biphenyls (PCBs), and deeply oxidizes these compounds. Natural gas is supplied to the after-combustion zone 603 via natural gas pipeline 703 to provide heat for combustion. The high-temperature environment completely decomposes these complex organic compounds into harmless substances such as carbon dioxide, water, and hydrogen chloride. The high-temperature design of the after-combustion zone 603 ensures complete oxidation of the organic compounds, avoiding the residue of incomplete combustion products caused by insufficient temperature.

[0022] The treated harmless gas enters the plate heat exchanger from the afterburner 603 through pipe 2 8. The plate heat exchanger transfers the heat from the high-temperature harmless gas to the waste gas to be treated, realizing energy recycling and reducing the overall energy consumption of the system. Finally, it is discharged through the exhaust pipe 9.

Claims

1. A highly efficient and convenient VOC waste gas treatment device, characterized in that: The system includes an intake pipe (1), a fan (2) located at the inlet of the intake pipe, a heat exchanger (3), a first pipeline (4), an exhaust gas compression chamber (5), a multi-zone incineration chamber (6), a natural gas pipeline (7), a second pipeline (8), and an exhaust pipe (9). The intake pipe (1) is connected to the heat exchanger (3), and the heat exchanger (3) is connected to the exhaust gas compression chamber (5) through the first pipeline (4). The exhaust gas compression chamber (5) is connected to the multi-zone incineration chamber (6). The multi-zone incineration chamber (6) is connected to the heat exchanger (3) through the second pipeline (8). The heat exchanger (3) is connected to the exhaust pipe (9). The multi-zone incineration chamber (6) includes a preheating zone (601), a main combustion zone (602), and an afterburning zone (603) connected in sequence. The preheating zone (601), the main combustion zone (602), and the afterburning zone (603) are respectively connected to natural gas pipelines.

2. The efficient and convenient VOC waste gas treatment device according to claim 1, characterized in that: The temperature of the preheating zone (601) is 300-400℃; the temperature of the main combustion zone (602) is 500-600℃; and the temperature of the afterburning zone (603) is 800-850℃.

3. The efficient and convenient VOC waste gas treatment device according to claim 1, characterized in that: The exhaust pipe (9) is equipped with a ceramic fiber filter layer.

4. The efficient and convenient VOC waste gas treatment device according to claim 3, characterized in that: The ceramic fiber filter layer is connected to the exhaust pipe (9) by a snap fastener.

5. The efficient and convenient VOC waste gas treatment device according to claim 1, characterized in that: The natural gas pipeline is connected to a safety valve.

6. The efficient and convenient VOC waste gas treatment device according to claim 1, characterized in that: The heat exchanger (3) is a plate heat exchanger.

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