Oven waste gas treatment and energy recovery integrated device
By designing an integrated oven exhaust gas treatment and energy recovery device, and utilizing heating, catalysis, and heat exchange technologies, the problem of separating exhaust gas treatment and energy recovery in electrophoresis ovens was solved, achieving efficient exhaust gas purification and energy recovery, and reducing operating costs and pollutant emissions.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-30
- Publication Date
- 2026-03-03
AI Technical Summary
In the existing technology, the exhaust gas treatment and energy recovery of the electrophoresis oven are operated by two separate devices, which leads to poor coordination, complex piping, inconvenient maintenance, and increased energy loss and leakage risks.
An integrated device for treating oven exhaust gas and recovering energy has been designed, comprising an exhaust gas treatment furnace, a reaction mechanism, an exchange mechanism, and an emission mechanism. It achieves integrated treatment of exhaust gas purification and energy recovery through steps such as heating, catalysis, heat exchange, and gas-water exchange.
It improves waste gas treatment efficiency, reduces pollutant emissions and enterprise operating costs, while also enhancing energy utilization and the operational stability of the equipment.
Smart Images
Figure CN223965417U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of environmental protection and energy conservation technology, and in particular to an integrated device for treating oven exhaust gas and recovering energy. Background Technology
[0002] An electrophoretic coating oven is a device used in the electrophoretic coating process to bake and cure workpieces. It is widely used in many industries such as automotive, home appliances, and hardware. Its function is to rapidly cure the electrophoretic paint on the workpiece surface through heating, forming a uniform, firm coating with good protective and decorative properties. During use, waste gas is generated because the organic solvents and other components in the electrophoretic paint volatilize under high-temperature baking. The waste gas generated in the electrophoretic coating oven mainly contains volatile organic compounds (VOCs), benzene, toluene, etc. These waste gases are extremely harmful. VOCs participate in photochemical reactions to form ozone, which irritates human mucous membranes and damages the olfactory system; benzene is a carcinogen, increasing the risk of leukemia and affecting hematopoietic function; toluene has an anesthetic effect, affecting the central nervous system, and also irritates the skin and mucous membranes, and damages the liver and kidneys. Therefore, it is necessary to treat the exhaust gas generated by the oven. An oven exhaust gas treatment device is used to treat the exhaust gas generated by an oven (such as an electrophoresis oven). It can effectively purify the exhaust gas generated in the electrophoresis oven, and an energy recovery device is needed to recover and utilize the heat energy generated during the purification process, thereby improving energy utilization efficiency.
[0003] Oven exhaust gas treatment devices typically include a filtration structure to remove particulate matter such as dust and paint residue from the exhaust gas; an adsorption structure, such as an activated carbon adsorption bed, to adsorb harmful gases such as volatile organic compounds; a catalytic combustion structure that uses a catalyst to burn organic waste gas at a lower temperature to produce carbon dioxide and water; and a plasma treatment structure that uses high-energy electrons and free radicals to decompose harmful components. Their working principle is to first filter, and then purify the exhaust gas through adsorption, combustion, or decomposition. Energy recovery and utilization devices typically include a heat exchange structure that uses the heat from the exhaust gas to preheat the intake air or provide heat for other equipment; and a power recovery structure, such as a turbine expander, that can convert the kinetic and pressure energy of the exhaust gas into mechanical or electrical energy. Their working principle is to achieve energy recovery through heat exchange and energy conversion.
[0004] In existing technologies, the waste gas treatment and energy recovery of electrophoresis ovens are usually operated by two separate devices. This results in poor coordination between the entire waste gas treatment device and the recovery process, complex piping, inconvenient maintenance, and reduced operating efficiency. The piping connection also increases the risk of energy loss and leakage, as well as the difficulty of maintenance and management and downtime. Therefore, an integrated device for oven waste gas treatment and energy recovery is proposed to solve the above problems. Utility Model Content
[0005] To overcome the above shortcomings, this utility model provides an integrated device for treating exhaust gas and recovering energy from an electrophoretic oven, aiming to improve the problem that the exhaust gas treatment and energy recovery process of the existing electrophoretic oven is inefficient due to the separate operation of two devices.
[0006] To achieve the above objectives, the present invention adopts the following technical solution:
[0007] An integrated device for treating exhaust gas from an oven and recovering energy includes an exhaust gas treatment furnace, a reaction mechanism fixedly connected to the inner wall of the exhaust gas treatment furnace, a vent pipe fixedly connected to the other end of the reaction mechanism, an exchange mechanism fixedly connected to the other end of the vent pipe, and a discharge mechanism fixedly connected to the other end of the exchange mechanism.
[0008] The reaction mechanism includes a heater, the outer wall of which is fixedly connected to the inner wall of the waste gas treatment furnace, a heating chamber is fixedly connected to the inner wall of the waste gas treatment furnace, a catalytic chamber is fixedly connected to the inner wall of the heating chamber, and the other end of the heating chamber is fixedly connected to one end of the ventilation pipe.
[0009] As a further description of the above technical solution:
[0010] The exchange mechanism includes a gas-gas exchanger, with an exhaust gas inlet fixedly connected to the top of the gas-gas exchanger, a diversion duct fixedly connected to the top of the gas-gas exchanger, a transport pipe fixedly connected to the other end of the gas-gas exchanger, and a gas-water exchanger fixedly connected to the other end of the transport pipe.
[0011] As a further description of the above technical solution:
[0012] The emission mechanism includes a fan, the output end of which is fixedly connected to the other end of the air-water exchanger, and a shock-absorbing base is fixedly connected to the bottom of the fan.
[0013] As a further description of the above technical solution:
[0014] The other end of the split duct is fixedly connected to the top of the heating chamber, and the split duct is used to transport oven exhaust gas into the heating chamber;
[0015] As a further description of the above technical solution:
[0016] The top of the gas-water exchanger is equipped with a hot water discharge pipe and a cold water inlet pipe.
[0017] This utility model has the following beneficial effects:
[0018] In this invention, waste gas is introduced into the waste gas inlet and then diverted into the heating chamber via a split duct. After being heated by the heater, the waste gas enters the catalytic chamber for purification. It then passes through a gas-to-gas exchanger, where the purified waste gas undergoes preliminary heat exchange with the initially introduced waste gas, thus preheating the waste gas and reducing its heat. A gas-to-water exchanger further reduces the heat of the purified waste gas, which is then extracted by a fan for low-temperature emission. This integrated waste gas treatment and energy recovery process reduces pollutant emissions, improves air quality, and minimizes harm to the surrounding ecosystem and human health, while also increasing energy efficiency, saving energy resources, and reducing enterprise operating costs. Attached Figure Description
[0019] Figure 1 This is a three-dimensional schematic diagram of an integrated device for treating oven exhaust gas and recovering energy according to the present invention.
[0020] Figure 2 This is a schematic diagram of the structure of the waste gas treatment furnace of the integrated device for treating oven exhaust gas and recovering energy proposed in this utility model.
[0021] Figure 3 This is a schematic diagram of the catalytic chamber of an integrated device for treating oven exhaust gas and recovering energy, as proposed in this utility model.
[0022] Legend:
[0023] 1. Waste gas treatment furnace; 2. Heater; 3. Heating chamber; 4. Catalytic chamber; 5. Ventilation pipe; 6. Gas-to-gas exchanger; 7. Waste gas inlet; 8. Diversion duct; 9. Transport pipe; 10. Gas-to-water exchanger; 11. Fan; 12. Vibration damping base. Detailed Implementation
[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0025] Reference Figures 1 to 3This utility model provides an embodiment of an integrated device for treating and recovering oven exhaust gas, comprising an exhaust gas treatment furnace 1. The exhaust gas treatment furnace 1 serves as the core processing area of the entire device, providing a stable reaction environment for the internal reaction mechanism while ensuring the device's sealing and stability, preventing exhaust gas leakage. A reaction mechanism is fixedly connected to the inner wall of the exhaust gas treatment furnace 1. This reaction mechanism is a key component for the preliminary treatment and transformation of oven exhaust gas, decomposing and transforming harmful substances in the exhaust gas to meet emission standards, while also laying the foundation for subsequent energy recovery steps. A vent pipe 5 is fixedly connected to the other end of the reaction mechanism. The vent pipe 5 smoothly and steadily transports the exhaust gas, after preliminary treatment by the reaction mechanism, to the exchange mechanism, ensuring the continuity of the entire treatment process and preventing leakage or blockage during transmission. The other end of the vent pipe 5 is also fixedly connected to the exchange mechanism, a crucial link in energy recovery. Utilizing the principle of heat exchange, it transfers residual heat from the exhaust gas to other media, enabling energy reuse, improving the overall energy efficiency of the device, and reducing energy waste. The other end of the exchange unit is fixedly connected to an emission unit, which is responsible for safely and pollution-free discharging the treated and energy-recovered exhaust gas into the atmosphere.
[0026] The reaction mechanism includes a heater 2, whose outer wall is fixedly connected to the inner wall of the waste gas treatment furnace 1. The heater 2 heats the waste gas entering the reaction mechanism, increasing its temperature. At higher temperatures, harmful substances in the waste gas are more likely to undergo chemical reactions, thus accelerating their decomposition and transformation, and improving the efficiency and effectiveness of waste gas treatment. A heating chamber 3 is fixedly connected to the inner wall of the waste gas treatment furnace 1. The heating chamber 3 provides a concentrated heating space for the waste gas, allowing it to fully absorb the heat generated by the heater 2 and ensuring it reaches a suitable reaction temperature before entering the catalytic chamber 4. A catalytic chamber 4 is fixedly connected to the inner wall of the heating chamber 3. The catalytic chamber 4 contains a specific catalyst (e.g., metal oxide catalyst, selective catalytic reduction catalyst, etc.). When the heated waste gas enters the catalytic chamber 4, the catalyst lowers the activation energy required for the chemical reaction of harmful substances in the waste gas, promoting their decomposition and transformation, such as converting some organic pollutants into harmless substances like carbon dioxide and water. This catalytic reaction is highly efficient and selective, enabling deep treatment of harmful substances at relatively low temperatures, reducing energy consumption, and improving the quality of waste gas treatment. The other end of the heating chamber 3 is fixedly connected to one end of the ventilation pipe 5. The exhaust gas after being treated by the heating chamber 3 and the catalytic chamber 4 smoothly enters the exchange mechanism through the ventilation pipe 5 to continue the subsequent treatment process.
[0027] The exchange mechanism includes a gas-to-gas exchanger 6, with an exhaust gas inlet 7 fixedly connected to its top. Exhaust gas generated in the oven enters the gas-to-gas exchanger 6 through the exhaust gas inlet 7. The working principle of the gas-to-gas exchanger 6 is to utilize the temperature difference between the exhaust gas and the treated exhaust gas. Through the heat exchange surface of the gas-to-gas exchanger 6, heat from the treated exhaust gas is transferred to the untreated exhaust gas, achieving heat recovery and utilization. This preheats the oven exhaust gas entering the oven and simultaneously reduces the temperature of the treated exhaust gas, minimizing heat loss during subsequent exhaust gas emissions and improving the overall energy efficiency of the system. A diversion duct 8 is fixedly connected to the top of the gas-to-gas exchanger 6, with the other end of the diversion duct 8 fixedly connected to the top of the heating chamber 3. The diversion duct 8 is used to transport oven exhaust gas into the heating chamber 3. The diversion duct 8 evenly distributes the exhaust gas generated by the oven into the heating chamber 3, ensuring uniform gas distribution within the chamber. This allows the exhaust gas to fully contact the heater 2 and catalyst, improving the effectiveness and efficiency of exhaust gas treatment and preventing localized overheating or insufficient treatment. A transport pipe 9 is fixedly connected to the other end of the gas-to-gas exchanger 6, and a gas-to-water exchanger 10 is fixedly connected to the other end of the transport pipe 9. The transport pipe 9 transports the exhaust gas, after initial cooling by the gas-to-gas exchanger 6, to the gas-to-water exchanger 10 for further heat recovery. A hot water discharge pipe and a cold water inlet pipe are located at the top of the gas-to-water exchanger 10. The gas-to-water exchanger 10 utilizes the significant temperature difference between the treated exhaust gas and the cold water, transferring heat from the exhaust gas to the cold water through heat exchange tubes, heating the cold water into hot water, while further cooling the purified exhaust gas. The hot water can be collected through the hot water discharge pipe and used in other production processes requiring hot water, achieving secondary energy recovery and improving overall energy utilization. Meanwhile, the temperature of the exhaust gas is further reduced after being treated by the gas-water exchanger 10, which reduces thermal pollution to the environment and makes the exhaust gas emissions more environmentally friendly.
[0028] The emission system includes a fan 11, the output of which is fixedly connected to the other end of the air-water exchanger 10. The function of the fan 11 is to provide power for the emission of exhaust gas, drawing the treated and energy-recovered exhaust gas from the air-water exchanger 10 and discharging it into the atmosphere through the outlet of the fan 11. The operation of the fan 11 ensures the continuity and stability of exhaust gas emission, prevents exhaust gas from accumulating inside the device, and ensures the normal operation of the entire device. A vibration damping base 12 is fixedly connected to the bottom of the fan 11. The vibration damping base 12 can effectively reduce the vibration and noise generated by the fan 11 during operation, prevent vibration from damaging other components of the device, extend the service life of the device, and also reduce noise pollution generated during the operation of the device.
[0029] Working Principle: First, the exhaust gas generated by the oven is introduced into the exhaust gas inlet 7 and transported to the heating chamber 3 by the diversion duct 8. The exhaust gas is then heated by the heater 2. The heating chamber 3 provides a concentrated heating space for the exhaust gas to reach a suitable temperature before it enters the catalytic chamber 4. In the catalytic chamber 4, a specific catalyst lowers the reaction activation energy, promoting the decomposition and transformation of harmful substances. The treated exhaust gas then enters the gas-to-gas exchanger 6 through the ventilation pipe 5. The exhaust gas is continuously introduced through the exhaust gas inlet 7 of the gas-to-gas exchanger 6, utilizing its heat exchange surface to exchange heat between the treated and untreated exhaust gas, achieving heat recovery and utilization. This preheats the exhaust gas entering the oven while simultaneously lowering the temperature of the treated exhaust gas. Finally, the untreated exhaust gas is evenly distributed to the oven via the diversion duct 8. The waste gas, initially cooled by the gas-to-gas exchanger 6, is then transported to the gas-to-water exchanger 10 via the transport pipe 9. The gas-to-water exchanger 10 utilizes the temperature difference between the waste gas and the cold water, transferring heat from the waste gas to the cold water through heat exchange tubes. The cold water is then heated and discharged, while the waste gas is further cooled. Finally, powered by the fan 11, the waste gas is drawn out of the gas-to-water exchanger 10 and discharged into the atmosphere at a low temperature through the fan 11's outlet. The vibration-damping base 12 at the bottom of the fan 11 reduces vibration and noise generated during its operation, ensuring normal operation of the device and reducing noise pollution. Throughout the process, the waste gas flows sequentially through each structure, and the close cooperation of these structures achieves integrated waste gas treatment and energy recovery, effectively improving energy utilization and ensuring safe, pollution-free waste gas emissions.
[0030] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A kind of oven exhaust gas treatment and energy recovery integrated device, including exhaust gas treatment furnace (1), it is characterized by: The inner wall of the waste gas treatment furnace (1) is fixedly connected with a reaction mechanism, the other end of the reaction mechanism is fixedly connected with a ventilation pipe (5), the other end of the ventilation pipe (5) is fixedly connected with an exchange mechanism, the other end of the exchange mechanism is fixedly connected with a discharge mechanism; The reaction mechanism comprises a heater (2), the outer wall of the heater (2) is fixedly connected with the inner wall of the waste gas treatment furnace (1), the inner wall of the waste gas treatment furnace (1) is fixedly connected with a heating chamber (3), the inner wall of the heating chamber (3) is fixedly connected with a catalytic chamber (4), and the other end of the heating chamber (3) is fixedly connected with one end of the ventilation pipe (5).
2. The integrated waste heat treatment and energy recovery device for an oven according to claim 1, wherein: The exchange mechanism comprises a gas-gas exchanger (6), the top of the gas-gas exchanger (6) is fixedly connected with a waste gas inlet (7), the top of the gas-gas exchanger (6) is fixedly connected with a shunt air pipe (8), the other end of the gas-gas exchanger (6) is fixedly connected with a conveying pipe (9), and the other end of the conveying pipe (9) is fixedly connected with a gas-water exchanger (10).
3. The integrated waste heat recovery and energy recycling device for a furnace according to claim 2, characterized in that: The discharge mechanism comprises a fan (11), the output end of the fan (11) is fixedly connected with the other end of the gas-water exchanger (10), and the bottom of the fan (11) is fixedly connected with a damping base (12).
4. The integrated waste heat recovery and energy recycling device for a furnace according to claim 2, characterized in that: The other end of the shunt air pipe (8) is fixedly connected with the top of the heating chamber (3), and the shunt air pipe (8) is used for conveying oven waste gas into the heating chamber (3).
5. The integrated waste heat recovery and energy recycling device for a furnace according to claim 2, characterized in that: The top of the gas-water exchanger (10) is provided with a hot water discharge pipe, and the top of the gas-water exchanger (10) is provided with a cold water inlet pipe.