A waste gas purification device based on rubber production

Abstract

This invention relates to the purification of waste gas from rubber production, specifically providing a waste gas purification device for rubber production, aiming to solve the problem that existing waste gas purification devices for rubber production are unable to adjust the gas path according to changes in waste gas temperature. To this end, the waste gas purification device for rubber production of this invention includes an inlet pipe, a washing component, a drying component, a moisture absorption component, an adsorption component, and a heat exchange component. The inlet pipe is connected to a waste gas source, and the inlet pipe, washing component, drying component, and moisture absorption component are all connected to the heat exchange component, so that the inlet pipe, washing component, drying component, and moisture absorption component are connected sequentially. This invention, by setting up a heat exchange component, allows the high-temperature waste gas discharged from the inlet pipe and the waste gas discharged from the drying component to exchange heat with the low-temperature waste gas discharged from the washing component, thereby preheating the waste gas entering the drying component. This increases the waste gas temperature without increasing additional heating energy consumption, reducing the heating load and energy consumption of the drying component.

Description

Technical Field

[0001] This invention relates to the purification of waste gas from rubber production, and specifically provides a waste gas purification device based on rubber production. Background Technology

[0002] During the production of rubber products, especially in processes such as rubber mixing, molding, and baking, a large amount of waste gas containing dust, oil mist, water vapor, and volatile organic compounds is generated. This type of waste gas is typically characterized by complex composition, high humidity, and large temperature fluctuations. If it is discharged directly without effective treatment, it can easily pollute the environment and fail to meet increasingly stringent environmental emission requirements.

[0003] Existing waste gas treatment devices for rubber production typically employ a combination of treatment units such as water washing, drying, and adsorption. The water washing unit removes particulate matter and some soluble pollutants from the waste gas, the drying unit reduces the humidity, and the adsorption unit further removes organic pollutants. However, in practical applications, these treatment units are mostly set up independently. The waste gas temperature is low after water washing, requiring additional heating devices to raise the temperature before it enters the drying unit, resulting in high energy consumption and increased operating costs.

[0004] To reduce energy consumption, some existing technologies attempt to introduce heat exchange structures into waste gas treatment systems, using high-temperature waste gas to preheat low-temperature waste gas. However, existing heat exchange schemes are mostly fixed gas path structures with a single heat exchange method, making it difficult to flexibly adjust according to real-time changes in waste gas temperature during rubber production. When the temperature of the inlet waste gas changes from the temperature of the treated waste gas, the heat exchange efficiency is often not fully utilized, and problems such as poor heat exchange effect or energy waste may even occur. In addition, existing waste gas treatment systems lack monitoring methods for waste gas temperature and control methods for switching gas paths based on temperature changes, resulting in a low overall level of system intelligence and difficulty in achieving efficient recovery and cascade utilization of waste gas heat energy.

[0005] Therefore, there is an urgent need in this field for a waste gas purification device based on rubber production to solve the above problems. Summary of the Invention

[0006] The present invention aims to solve the above-mentioned technical problems, namely, to solve the problem that existing rubber production waste gas purification devices are difficult to flexibly adjust the gas path and heat exchange method according to the changes in waste gas temperature, resulting in low efficiency of waste gas heat energy recovery and utilization, high drying energy consumption, and insufficient overall operating energy efficiency.

[0007] In a first aspect, the present invention provides a waste gas purification device based on rubber production. The device includes an air inlet pipe, a water washing component, a drying component, a moisture absorption component, an adsorption component, and a heat exchange component. The air inlet pipe is connected to the waste gas source. The air inlet pipe, the water washing component, the drying component, and the moisture absorption component are all connected to the heat exchange component, such that the air inlet pipe, the water washing component, the drying component, and the moisture absorption component are connected in sequence. The moisture absorption component is connected to the adsorption component. The heat exchange component enables the exhaust gas discharged from the air inlet pipe to exchange heat with the exhaust gas discharged from the water washing component, and also enables the exhaust gas discharged from the drying component to exchange heat with the exhaust gas discharged from the water washing component.

[0008] In a specific embodiment of the above-mentioned waste gas purification device based on rubber production, the heat exchange component includes a first heat exchanger, the first heat exchanger includes a first channel and a second channel, the inlet of the first channel can be connected to one of the air inlet pipe and the drying component, and the inlet of the second channel is connected to the water washing component.

[0009] In a specific embodiment of the above-mentioned waste gas purification device based on rubber production, the heat exchange component further includes a second heat exchanger, which includes a third channel and a fourth channel. The inlet of the third channel can be connected to one of the air inlet pipe and the drying component. The inlet of the fourth channel is connected to the outlet of the second channel, and the outlet of the fourth channel is connected to the drying component.

[0010] In a specific embodiment of the above-mentioned waste gas purification device based on rubber production, the heat exchange component further includes a first control valve, and the first channel, the third channel, the air inlet pipe, and the drying component are all connected to the first control valve; The first state of the first control valve is that the first channel is connected to the air inlet pipe, and the third channel is connected to the drying assembly; The second state of the first control valve is that the first channel is connected to the drying assembly, and the third channel is connected to the air inlet pipe.

[0011] In a specific embodiment of the above-mentioned waste gas purification device based on rubber production, the heat exchange component further includes a second control valve, and the first channel, the third channel, the water washing component, and the water absorption component are all connected to the second control valve; The first state of the second control valve is that the first channel is connected to the water washing assembly, and the third channel is connected to the water absorption assembly; The second state of the second control valve is that the first channel is connected to the water absorption assembly, and the third channel is connected to the water washing assembly.

[0012] In a specific embodiment of the above-mentioned waste gas purification device based on rubber production, the heat exchange component further includes a first temperature detection element, which is disposed at the air inlet pipe and is used to detect the waste gas temperature at the air inlet pipe.

[0013] In a specific embodiment of the above-mentioned waste gas purification device based on rubber production, the heat exchange component further includes a second temperature detection element, which is disposed at the drying component and is used to detect the waste gas temperature at the drying component.

[0014] In the specific embodiment of the above-mentioned waste gas purification device based on rubber production, the heat exchange component further includes a control module. The first temperature detection element, the second temperature detection element, the first control valve, and the second control valve are all electrically connected to the control module. The control module can control the state of the first control valve and the state of the second control valve according to the waste gas temperature at the air inlet pipe detected by the first temperature detection element and the waste gas temperature at the drying component detected by the second temperature detection element.

[0015] By adopting the above technical solution, the present invention sets up a heat exchange component, which allows the high-temperature exhaust gas discharged from the air inlet pipe and the exhaust gas discharged from the drying component to exchange heat with the low-temperature exhaust gas discharged from the water washing component, thereby preheating the exhaust gas entering the drying component. This increases the exhaust gas temperature without increasing additional heating energy consumption, reducing the heating load and energy consumption of the drying component. At the same time, the exhaust gas undergoes water washing, drying, moisture absorption and adsorption treatment in sequence, achieving effective removal of impurities and moisture from the rubber production exhaust gas, improving the exhaust gas purification effect. The overall structure is compact and has high energy utilization efficiency, making it suitable for energy-saving purification treatment of rubber production exhaust gas.

[0016] Furthermore, the present invention provides a first heat exchanger in the heat exchange assembly, and a first channel and a second channel are provided in the first heat exchanger. This allows the higher-temperature exhaust gas from the intake pipe or drying assembly to flow in the first channel, while the lower-temperature exhaust gas discharged from the water washing assembly flows in the second channel. This achieves heat exchange between the two exhaust gases without mixing, preheats the water-washed exhaust gas, increases the temperature of the exhaust gas entering the subsequent drying assembly, reduces the heating energy consumption required for drying, and helps improve the energy utilization efficiency in the exhaust gas treatment process.

[0017] Furthermore, this invention further incorporates a second heat exchanger within the heat exchange assembly, and a third and fourth channel within the second heat exchanger. This allows the higher-temperature exhaust gas from the intake pipe or drying assembly to flow in the third channel, while the exhaust gas, after heat exchange with the first heat exchanger, continues to flow in the fourth channel and enters the drying assembly. This creates a multi-stage heat exchange process before entering the drying assembly, gradually increasing the temperature of the washed exhaust gas. This further reduces the energy consumption required for the drying assembly to heat the exhaust gas, improves the recovery and utilization rate of exhaust gas heat energy, and ultimately enhances the overall energy efficiency of the exhaust gas purification device.

[0018] Furthermore, by setting a first control valve in the heat exchange assembly and connecting the first channel, the third channel, the air inlet pipe, and the drying assembly to the first control valve, the present invention can selectively switch the connection relationship between the air inlet pipe or the drying assembly and the first and third channels under different states of the first control valve. This allows higher-temperature exhaust gas to be introduced into the corresponding channel to participate in heat exchange according to the different exhaust gas sources, thereby improving the flexibility and adaptability of the heat exchange process. This is beneficial for fully utilizing the thermal energy of high-temperature exhaust gas under varying exhaust gas temperature conditions, improving heat exchange efficiency, and reducing the overall energy consumption of the system.

[0019] Furthermore, by setting a second control valve in the heat exchange assembly and connecting the first channel, the third channel, the water washing assembly, and the water suction assembly to the second control valve, the present invention can flexibly switch the connection relationship between the water washing assembly and the water suction assembly and the first and third channels under different states of the second control valve. This, in conjunction with the first control valve, enables dynamic adjustment of the exhaust gas flow direction, allowing exhaust gases of different temperature levels to participate in heat exchange and enter the corresponding treatment units according to a predetermined path. This is beneficial to improving the synergistic efficiency between the heat exchange assembly and subsequent treatment components, enhancing the adaptability of the exhaust gas treatment process, and further improving the overall energy utilization efficiency and operational stability of the system.

[0020] Furthermore, by setting a first temperature detection element at the air inlet pipe to detect the temperature of the exhaust gas entering the device in real time, the present invention can provide accurate temperature basis for the state switching of the control valve in the heat exchange component, so that the exhaust gas can be reasonably guided to participate in the heat exchange treatment under different temperature conditions, thereby improving the pertinence and effectiveness of the heat exchange process, which is conducive to making full use of the exhaust gas's own heat energy and improving the operational stability and energy-saving effect of the entire exhaust gas purification device.

[0021] Furthermore, by setting a second temperature detection element at the drying component, the present invention can detect the temperature of the dried exhaust gas in real time, which can be compared with the exhaust gas temperature at the inlet pipe. This provides a reliable control basis for the switching of the control valve in the heat exchange component, enabling the heat exchange process to be dynamically adjusted according to the changes in exhaust gas temperature. This ensures that the temperature of the exhaust gas entering the subsequent treatment unit is within a reasonable range, which is beneficial to improving heat exchange efficiency, reducing energy consumption, and enhancing the overall operational stability of the exhaust gas purification device.

[0022] Furthermore, by setting up a control module and electrically connecting the first temperature sensor, the second temperature sensor, the first control valve, and the second control valve to the control module, the present invention can automatically control the state of the first control valve and the second control valve based on the comparison between the exhaust gas temperature at the intake pipe and the exhaust gas temperature at the drying component. This enables intelligent switching of the exhaust gas flow direction and heat exchange path, allowing exhaust gas under different temperature conditions to participate in the optimal heat exchange process. This is beneficial for fully recovering the heat energy of the exhaust gas, reducing the energy consumption of the system, and improving the automation level and operational reliability of the exhaust gas purification device. Attached Figure Description

[0023] The preferred embodiments of the present invention are described below with reference to the accompanying drawings, in which: Figure 1 This is a schematic diagram of the structure of a waste gas purification device based on rubber production in the first state provided by the present invention; Figure 2 This is a schematic diagram of the connection structure of the control module of a waste gas purification device based on rubber production provided by the present invention; Figure 3 This is a schematic diagram of the second state of a waste gas purification device based on rubber production provided by the present invention.

[0024] List of reference numerals in the attached diagram: 1. First heat exchanger; 2. First heat exchange plate; 3. First channel; 4. Second channel; 5. Second heat exchanger; 6. Second heat exchange plate; 7. Third channel; 8. Fourth channel; 9. First control valve; 10. First interface; 11. Second interface; 12. Third interface; 13. Fourth interface; 14. Second control valve; 15. Fifth interface; 16. Sixth interface; 17. Seventh interface; 18. Eighth interface; 19. Inlet pipe; 20. First temperature detection element; 21. Water washing assembly; 22. Drying assembly; 23. Second temperature detection element; 24. Moisture absorption assembly; 25. Adsorption assembly; 26. Rubber oven; 27. Control module. Detailed Implementation

[0025] Preferred embodiments of the present invention will now be described with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are merely illustrative of the technical principles of the present invention and are not intended to limit the scope of protection of the present invention.

[0026] It should be noted that in the description of this invention, terms such as "upper," "lower," "left," "right," "inner," and "outer," indicating directional or positional relationships, are based on the directional or positional relationships shown in the accompanying drawings. These are merely for ease of description and do not indicate or imply that the device or element must have a specific orientation, or be constructed and operated in a specific orientation; therefore, they should not be construed as limitations on this invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0027] Furthermore, it should be noted that, in the description of this invention, unless otherwise explicitly specified and limited, the terms "installation," "setting," and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection, an indirect connection through an intermediate medium, or a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0028] To address the problem that existing rubber production waste gas purification devices struggle to flexibly adjust the gas path and heat exchange method according to changes in waste gas temperature, resulting in low efficiency of waste gas heat recovery and utilization, high drying energy consumption, and overall insufficient operational energy efficiency, this paper refers to... Figure 1 This embodiment discloses a waste gas purification device based on rubber production. The device includes a heat exchange component, an air inlet pipe 19, a water washing component 21, a drying component 22, a moisture absorption component 24, an adsorption component 25, and a control module 27.

[0029] The heat exchange assembly includes a first heat exchanger 1, a second heat exchanger 5, a first control valve 9, a second control valve 14, a first temperature sensor 20, and a second temperature sensor 23.

[0030] The first heat exchanger 1 includes a first heat exchange plate 2, a first channel 3, and a second channel 4. The first heat exchange plate 2 is disposed between the first channel 3 and the second channel 4. The first heat exchange plate 2 can separate the first channel 3 and the second channel 4, and can also allow the fluid in the first channel 3 and the fluid in the second channel 4 to exchange heat.

[0031] The second heat exchanger 5 includes a second heat exchange plate 6, a third channel 7, and a fourth channel 8. The second heat exchange plate 6 is disposed between the third channel 7 and the fourth channel 8. The second heat exchange plate 6 can separate the third channel 7 and the fourth channel 8, and also allows heat exchange between the fluid in the third channel 7 and the fluid in the fourth channel 8. Furthermore, the outlet of the second channel 4 is connected to the inlet of the fourth channel 8.

[0032] The first control valve 9 is specifically a directional control valve. The first control valve 9 includes a first port 10, a second port 11, a third port 12, and a fourth port 13. The first control valve 9 has two states. In the first state, the first port 10 is connected to the third port 12, and the second port 11 is connected to the fourth port 13. In the second state, the first port 10 is connected to the fourth port 13, and the second port 11 is connected to the third port 12. The first port 10 is connected to the inlet of the first channel 3, and the second port 11 is connected to the inlet of the third channel 7.

[0033] The second control valve 14 is specifically a directional control valve. The second control valve 14 includes a fifth port 15, a sixth port 16, a seventh port 17, and an eighth port 18. The second control valve 14 has two states. In the first state, the fifth port 15 is connected to the seventh port 17, and the sixth port 16 is connected to the eighth port 18. In the second state, the fifth port 15 is connected to the eighth port 18, and the sixth port 16 is connected to the seventh port 17. The fifth port 15 is connected to the outlet of the first channel 3, and the sixth port 16 is connected to the outlet of the third channel 7.

[0034] One end of the intake pipe 19 is connected to the rubber oven 26, and the other end is connected to the third port 12 of the first control valve 9. The first temperature detection element 20 is installed at the intake pipe 19 and is used to detect the temperature of the exhaust gas in the intake pipe 19.

[0035] The washing assembly 21 includes a washing tank and a sprayer installed inside the washing tank. The washing tank is used to hold the exhaust gas that needs to be washed. The sprayer is installed inside the washing tank and connected to a water source, providing spray water into the washing tank. One end of the washing tank is connected to the seventh port 17 of the second control valve 14, and the other end is connected to the inlet of the second channel 4. The washing assembly 21 is used to wash the exhaust gas generated by the rubber oven 26 to remove impurities from the exhaust gas. The washed exhaust gas flows into the second channel 4.

[0036] The drying assembly 22 includes a drying chamber and a heating element. The drying chamber contains the exhaust gas to be dried, and the heating element is located inside the dryer. The heating element heats the exhaust gas inside the drying chamber to remove moisture from the exhaust gas. The heating element can be a heating wire or a thermocouple, and its specific structure is the same as that of heating elements in the prior art, so its specific structure will not be described in detail here. One end of the drying chamber is connected to the outlet of the fourth channel 8, and the other end is connected to the fourth port 13 of the first control valve 9. A second temperature sensor 23 is located in the gas path between the drying chamber and the first control valve 9. The second temperature sensor 23 is used to detect the temperature of the dried exhaust gas.

[0037] The water absorption assembly includes a water absorption tank and a water absorption element. The water absorption tank is used to hold the exhaust gas that needs to be absorbed, and the water absorption element is any one of absorbent cotton, absorbent resin, or silica gel. The dried exhaust gas is absorbed by the water absorption element to reduce the moisture content of the exhaust gas. One end of the water absorption tank is connected to the eighth port 18 of the second control valve 14, and the other end of the water absorption tank is connected to the adsorption assembly 25.

[0038] The adsorption assembly 25 includes an adsorption box and an adsorption element. The adsorption box is used to contain the waste gas from which impurities need to be adsorbed. The adsorption element is specifically activated carbon or alkaline washing liquid. One end of the adsorption box is connected to a water absorption box.

[0039] Reference Figure 2 The first control valve 9, the second control valve 14, the first temperature sensor 20, and the second temperature sensor 23 are all electrically connected to the control module 27. The control module 27 can control the state of the first control valve 9 and the second control valve 14 based on the exhaust gas temperature detected by the first temperature sensor 20 at the intake pipe 19 and the exhaust gas temperature detected by the second temperature sensor 23 at the drying chamber.

[0040] Reference Figure 1 When the exhaust gas temperature at the intake pipe 19 is higher than the exhaust gas temperature discharged from the drying chamber, the first control valve 9 switches to a state that connects the first interface 10 to the fourth interface 13 and the second interface 11 to the third interface 12, and the second control valve 14 switches to a state that connects the fifth interface 15 to the eighth interface 18 and the sixth interface 16 to the seventh interface 17. The exhaust gas flows sequentially through the intake pipe 19, the third channel 7, the water washing assembly 21, the second channel 4, the fourth channel 8, the drying assembly 22, the first channel 3, the water absorption assembly, and the adsorption assembly 25. During the above flow process, the low-temperature exhaust gas discharged from the water washing assembly 21 flows sequentially through the second channel 4 and the fourth channel 8 and then into the drying assembly 22. The high-temperature exhaust gas discharged from the drying assembly 22 flows into the first channel 3, where the high-temperature exhaust gas in the first channel 3 exchanges heat with the low-temperature exhaust gas in the second channel 4, causing the exhaust gas in the second channel 4 to heat up; the high-temperature exhaust gas discharged from the intake pipe 19 flows into the third channel 7, where the high-temperature exhaust gas in the third channel 7 exchanges heat with the low-temperature exhaust gas in the fourth channel 8. Through the aforementioned staged heat exchange, the temperature of the exhaust gas entering the drying assembly 22 gradually increases, thereby reducing the energy consumption required for the drying assembly 22 to heat the exhaust gas. Furthermore, since the exhaust gas temperature at the inlet pipe 19 is higher than the exhaust gas temperature discharged from the drying assembly 22, the low-temperature exhaust gas first exchanges heat with the lower-temperature exhaust gas, and then with the higher-temperature exhaust gas, which is beneficial to improving heat exchange efficiency and realizing the cascade utilization of energy.

[0041] Reference Figure 3When the exhaust gas temperature at the intake pipe 19 is lower than the exhaust gas temperature discharged from the drying chamber, the first control valve 9 switches to a state where the first interface 10 is connected to the third interface 12 and the second interface 11 is connected to the fourth interface 13, and the second control valve 14 switches to a state where the fifth interface 15 is connected to the seventh interface 17 and the sixth interface 16 is connected to the eighth interface 18. The exhaust gas flows sequentially through the intake pipe 19, the first channel 3, the water washing assembly 21, the second channel 4, the fourth channel 8, the drying assembly 22, the third channel 7, the water absorption assembly, and the adsorption assembly 25. During the above flow process, the low-temperature exhaust gas discharged from the water washing assembly 21 flows sequentially through the second channel 4 and the fourth channel 8 and then into the drying assembly 22. The high-temperature exhaust gas discharged from the intake pipe 19 flows into the first channel 3, where the high-temperature exhaust gas in the first channel 3 exchanges heat with the low-temperature exhaust gas in the second channel 4, causing the exhaust gas in the second channel 4 to heat up; the high-temperature exhaust gas discharged from the drying assembly 22 flows into the third channel 7, where the high-temperature exhaust gas in the third channel 7 exchanges heat with the low-temperature exhaust gas in the fourth channel 8. Through the aforementioned staged heat exchange, the temperature of the exhaust gas entering the drying assembly 22 gradually increases, thereby reducing the energy consumption required for the drying assembly 22 to heat the exhaust gas. Furthermore, since the exhaust gas temperature at the inlet pipe 19 is lower than the exhaust gas temperature discharged from the drying assembly 22, the low-temperature exhaust gas first exchanges heat with the lower-temperature exhaust gas, and then with the higher-temperature exhaust gas, which is beneficial to improving heat exchange efficiency and realizing the cascade utilization of energy.

[0042] The technical solution of the present invention has been described above with reference to the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the scope of protection of the present invention is obviously not limited to these specific embodiments. Without departing from the principles of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after such changes or substitutions will all fall within the scope of protection of the present invention.

Claims

1. A waste gas purification device based on rubber production, characterized by, It includes an air intake pipe, a water washing component, a drying component, a moisture absorption component, an adsorption component, and a heat exchange component. The air intake pipe is connected to the exhaust gas source. The air intake pipe, the water washing component, the drying component, and the moisture absorption component are all connected to the heat exchange component, so that the air intake pipe, the water washing component, the drying component, and the moisture absorption component are connected in sequence. The moisture absorption component is connected to the adsorption component. The heat exchange component enables the exhaust gas discharged from the air inlet pipe to exchange heat with the exhaust gas discharged from the water washing component, and also enables the exhaust gas discharged from the drying component to exchange heat with the exhaust gas discharged from the water washing component.

2. The waste gas purification device based on rubber production according to claim 1, characterized in that, The heat exchange assembly includes a first heat exchanger, which includes a first channel and a second channel. The inlet of the first channel can be connected to either the air inlet pipe or the drying assembly, and the inlet of the second channel is connected to the water washing assembly.

3. The waste gas purification device based on rubber production according to claim 2, characterized in that, The heat exchange assembly further includes a second heat exchanger, which includes a third channel and a fourth channel. The inlet of the third channel can be connected to one of the air inlet pipe and the drying assembly. The inlet of the fourth channel is connected to the outlet of the second channel, and the outlet of the fourth channel is connected to the drying assembly.

4. The exhaust gas purification device for rubber production according to claim 3, characterized by The heat exchange assembly further includes a first control valve, and the first channel, the third channel, the air inlet pipe, and the drying assembly are all connected to the first control valve; The first state of the first control valve is that the first channel is connected to the air inlet pipe, and the third channel is connected to the drying assembly; The second state of the first control valve is that the first channel is connected to the drying assembly, and the third channel is connected to the air inlet pipe.

5. The waste gas purification device based on rubber production according to claim 4, characterized in that, The heat exchange assembly further includes a second control valve, and the first channel, the third channel, the water washing assembly, and the water absorption assembly are all connected to the second control valve; The first state of the second control valve is that the first channel is connected to the water washing assembly, and the third channel is connected to the water absorption assembly; The second state of the second control valve is that the first channel is connected to the water absorption assembly, and the third channel is connected to the water washing assembly.

6. The waste gas purification device based on rubber production according to claim 5, characterized in that, The heat exchange assembly further includes a first temperature detection element, which is disposed at the air intake pipe and is used to detect the exhaust gas temperature at the air intake pipe.

7. The waste gas purification device based on rubber production according to claim 6, characterized in that, The heat exchange assembly further includes a second temperature detection element, which is disposed at the drying assembly and is used to detect the exhaust gas temperature at the drying assembly.

8. The waste gas purification device based on rubber production according to claim 6, characterized in that, The heat exchange assembly also includes a control module. The first temperature sensor, the second temperature sensor, the first control valve, and the second control valve are all electrically connected to the control module. The control module can control the state of the first control valve and the state of the second control valve based on the exhaust gas temperature at the intake pipe detected by the first temperature sensor and the exhaust gas temperature at the drying assembly detected by the second temperature sensor.

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