Centralized electric heating drying and waste gas treatment system

Abstract

The invention discloses a centralized electric heating drying and waste gas treatment system which comprises a drying chamber, a heating device and an electric heating waste gas incinerator supplying heat to the heating device, a circulating air supply pipe and a circulating air return pipe are arranged between the heating device and the drying chamber, and the electric heating waste gas incinerator is connected with the heating device. The electric heating waste gas incinerator is connected with the drying chamber; the mode that centralized electric heating heat supply and regional heat distribution are combined is adopted, efficient integration of drying and waste gas treatment is achieved, and the waste gas treatment process design has the remarkable energy-saving and environment-friendly advantages.

Description

Technical Field

[0001] This invention relates to the field of drying and waste gas treatment, and more particularly to a centralized electric heating drying and waste gas treatment system. Background Technology

[0002] In the automotive painting process, the coating sprayed on the surface of the workpiece needs to be heated and dried during the film formation process to accelerate the evaporation of solvents or water in the coating, while promoting the cross-linking polymerization reaction of the resin to achieve coating curing.

[0003] In related technologies, traditional heating devices mostly use gas heating. Gas heating, due to its high combustion temperature, easily produces a large amount of... Emissions and carbon emissions: The drying process generates waste gas containing VOCs, which requires an additional electric RTO to treat the waste gas, increasing equipment cost and complexity. Summary of the Invention

[0004] To address the aforementioned problems, this invention provides a centralized electric heating drying and waste gas treatment system.

[0005] To achieve the above objectives, this application provides the following technical solution:

[0006] A centralized electric heating drying and waste gas treatment system includes a drying chamber, a heating device, and an electric waste gas incinerator that supplies heat to the heating device. A circulating air supply pipe and a circulating air return pipe are provided between the heating device and the drying chamber. The electric waste gas incinerator is connected to the heating device and the drying chamber.

[0007] The heating device is further configured to include an integrated circulating fan, a heat exchanger, and a filter.

[0008] The further configuration includes: a built-in incinerator heat exchanger and an electric heater in the electric waste gas incinerator; the incinerator heat exchanger is connected to the drying chamber via a recovery pipeline; a waste gas fan is installed on the recovery pipeline; and a connecting pipe is provided between the incinerator heat exchanger and the electric heater.

[0009] The electric waste gas incinerator is further configured such that: an exhaust pipe leading to the outside is provided on the exhaust pipe, and an incinerator temperature regulating valve is provided on the exhaust pipe; an incinerator outlet sensor for controlling the opening and closing degree of the incinerator temperature regulating valve is provided on the side of the exhaust pipe near the electric waste gas incinerator.

[0010] The configuration is further defined as follows: multiple electric heaters are provided, and the multiple electric heaters are evenly arranged inside the electric waste gas incinerator. One end of each electric heater is provided with an electric heater terminal located outside the electric waste gas incinerator. An electric heating cooling chamber is provided on the outside of the electric waste gas incinerator, which integrates the multiple electric heater terminals.

[0011] The configuration is further defined as follows: a circulating air inlet pipe and a circulating air outlet pipe are provided between the exhaust pipe and the multiple heating heat exchangers; a heating temperature regulating valve installed on the exhaust pipe is provided between the circulating air inlet pipe and the circulating air outlet pipe; and an air supply temperature sensor for controlling the opening and closing degree of the heating temperature regulating valve is installed on the circulating air supply pipe.

[0012] The configuration is further defined as follows: a fresh air heat exchanger is provided on the side of the exhaust pipe away from the electric heating waste gas incinerator and multiple heating devices; a bypass air passage is provided on the exhaust pipe and intersects with the fresh air heat exchanger; and a fresh air temperature regulating valve is provided on the bypass air passage.

[0013] The configuration is further defined as follows: A pipe is provided between the fresh air heat exchanger and the electric heating cooling chamber, and a fresh air fan is provided on the A pipe; a B pipe is provided between the fresh air heat exchanger and the drying chamber, and a fresh air temperature sensor is provided on the B pipe.

[0014] A further configuration is provided: the oxidation chamber inside the electric waste gas incinerator is equipped with an oxidation chamber temperature sensor, which controls the power of the electric heater.

[0015] The filter is located between the circulating fan and the heat exchanger.

[0016] Compared with the prior art, the beneficial technical effects of the present invention are as follows:

[0017] 1. This invention combines centralized electric heating with regional heat distribution, achieving highly efficient integration of drying and waste gas treatment. The waste gas treatment process design of this invention has significant energy-saving and environmental advantages. The waste gas first enters a heat exchanger for preheating. This process not only increases the temperature of the waste gas but also recovers some heat, reducing the energy consumption required for subsequent heating. The preheated waste gas is then further heated by an electric heater to reach the high-temperature conditions required for VOC treatment. The treated high-temperature waste gas completes the oxidation and decomposition of VOCs in the combustion chamber, while simultaneously transferring heat to the subsequently entering waste gas, further improving thermal efficiency. Finally, the temperature of the treated waste gas decreases, and this heat is used to heat the drying system, achieving highly efficient heat utilization. This design not only saves a significant amount of energy but also extends the service life of the equipment, reduces damage caused by high-temperature operation, and improves the overall performance and economy of the system.

[0018] 2. This invention, through ingenious design, introduces fresh air into the wiring terminals of the electric heater, achieving external cooling of the heater while simultaneously utilizing this heat to heat the fresh air. In traditional systems, the heat dissipation of the electric heater is often wasted. This invention, through this design, not only solves the heat dissipation problem at the heater's wiring terminals but also utilizes this heat to preheat the fresh air, further improving the system's thermal efficiency. This design not only saves energy but also reduces equipment damage caused by high-temperature heat dissipation, extending equipment lifespan. Furthermore, the preheated fresh air can be used as an air curtain in the drying chamber or in other areas requiring heating, further optimizing the overall system performance and improving production efficiency and economy.

[0019] 3. This invention incorporates multiple sets of electric heaters within the electrically heated incinerator, a design that significantly improves system stability and reliability. Traditional systems with a single electric heater may shut down entirely in the event of a malfunction, leading to production interruptions. However, this invention, with its multiple sets of electric heaters, ensures that even if one set fails, the others can continue operating, guaranteeing normal system operation. This redundancy not only reduces production losses due to equipment failure but also extends equipment lifespan. Furthermore, the power distribution of the multiple sets of electric heaters can be flexibly adjusted according to actual needs, further optimizing system efficiency and reducing energy consumption. Attached Figure Description

[0020] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0022] Figure 2 This is a schematic diagram of the swirl structure of the present invention.

[0023] Reference numerals: 1. Drying chamber; 2. Electric waste gas incinerator; 3. Heating device; 4. Circulating air supply duct; 5. Circulating return air duct; 6. Circulating fan; 7. Heating heat exchanger; 8. Filter; 10. Incinerator heat exchanger; 11. Electric heater; 12. Recovery pipeline; 13. Waste gas fan; 14. Connecting pipe; 15. Exhaust pipe; 16. Incinerator temperature regulating valve; 17. Air supply temperature sensor; 18. Electric heater terminal; 19. Electric heating cooling chamber; 20. Oxidation chamber temperature sensor; 21. Circulating air inlet pipe; 22. Circulating air outlet pipe; 23. Heating temperature regulating valve; 24. Incinerator outlet sensor; 25. Fresh air heat exchanger; 26. Bypass air path; 27. Fresh air temperature regulating valve; 28. Pipe A; 29. ​​Fresh air fan; 30. Pipe B; 31. Fresh air temperature sensor; 100. Swirl structure. Detailed Implementation

[0024] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0025] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" 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 mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0026] Example

[0027] Reference Figures 1-2 The present invention discloses a centralized electric heating drying and waste gas treatment system, including a drying chamber 1, an electric waste gas incinerator 2, and multiple sets of heating devices 3. Each set of heating devices 3 is provided with a circulating air supply pipe 4 and a circulating air return pipe 5 between itself and the drying chamber 1. The circulating air supply pipe 4 is used to transport the circulating drying air heated by the heating devices 3 to the drying chamber 1. After the circulating drying air is cooled down, it returns to the heating devices 3 through the circulating air return pipe 5, and the heating devices 3 reheat the circulating drying air.

[0028] In this embodiment, the heating device 3 is connected to the electric waste gas incinerator 2, and the heat of the heating device 3 is provided by the electric waste gas incinerator 2.

[0029] Specifically, the heating device 3 includes an integrated circulating fan 6, a heat exchanger 7, a filter 8, and a heating temperature regulating valve 23. The circulating fan 6 drives the circulating drying air to circulate between the heating device 3 and the drying chamber 1, so that the heated circulating drying air enters the drying chamber 1 through the circulating air supply pipe 4, ensuring that heat is transferred to the workpiece and that the workpiece is fully heated. Afterward, the circulating air cools down and returns to the heating device 3 through the circulating return air pipe 5. The circulating fan 6 maintains this circulation process continuously, achieving efficient utilization of heat and ensuring the stability of the drying effect.

[0030] In this embodiment, the filter 8 is located between the circulating fan 6 and the heating heat exchanger 7.

[0031] An incinerator heat exchanger 10 and an electric heater 11 are built into the electric waste gas incinerator 2. The incinerator heat exchanger 10 is connected to the drying chamber 1 through a recovery pipeline 12. An exhaust gas fan 13 is installed on the recovery pipeline 12. A connecting pipe 14 is provided between the incinerator heat exchanger 10 and the electric heater 11. The exhaust gas fan 13 is used to draw the waste gas to be treated from the drying chamber 1 and send it into the incinerator heat exchanger 10. The waste gas is preheated by the incinerator heat exchanger 10 and becomes heat-exchanged waste gas. Then, it is sent to the electric heater 11 through the connecting pipe 14 to exchange heat with the electric heater 11. The waste gas after heat exchange is swirled and oxidized in the oxidation chamber of the electric waste gas incinerator 2 (swirling time is 0.5~2 seconds) to achieve full oxidation and decomposition of VOCs in the waste gas.

[0032] After the gas undergoes secondary heat exchange and heating and oxidation decomposition, part of the heat is absorbed by the incinerator heat exchanger 10, and the other part is discharged from the electric heating waste gas incinerator 2 through the exhaust pipe 15.

[0033] In this embodiment, an exhaust pipe 15 leading to the outside is provided on the electric waste gas incinerator 2, and an incinerator temperature regulating valve 16 is provided on the exhaust pipe 15. An incinerator outlet sensor 24 is provided on the side of the exhaust pipe 15 near the electric waste gas incinerator 2. The incinerator outlet sensor 24 controls the opening and closing degree of the incinerator temperature regulating valve 16 according to its own detection results, thereby regulating the amount of flue gas entering the incinerator heat exchanger to achieve stable temperature control. Specifically, when it is necessary to increase the temperature of the incinerator heat exchanger, the opening and closing degree of the incinerator temperature regulating valve 16 is reduced to reduce the amount of exhaust gas, so that more heat is retained inside the electric waste gas incinerator 2, thereby allowing more high-temperature flue gas to enter the incinerator heat exchanger 10, realizing the temperature increase regulation of the incinerator heat exchanger 10. Conversely, the opening and closing degree of the incinerator temperature regulating valve 16 is increased to realize the temperature decrease regulation of the incinerator heat exchanger 10.

[0034] Furthermore, multiple electric heaters 11 are provided, and the multiple electric heaters 11 are evenly arranged inside the electric waste gas incinerator 2. One end of the electric heater 11 is provided with an electric heater terminal 18 located outside the electric waste gas incinerator 2. The outer side of the electric waste gas incinerator 2 is provided with an electric heating cooling chamber 19 that integrates the multiple electric heater terminals 18.

[0035] The workpieces being dried and heated in the drying chamber 1 will generate VOC waste gas during the heating process. The waste gas fan 13 in this invention is used to draw the waste gas from the drying chamber 1 and send it into the electric waste gas incinerator 2. The waste gas is first preheated by the incinerator heat exchanger 10 and becomes heat-exchanged waste gas. Then it exchanges heat with the electric heater 11 and is heated by the electric heater 11 before entering the oxidation chamber in the electric waste gas incinerator 2. An oxidation chamber temperature sensor 20 is installed in the oxidation chamber of the electric waste gas incinerator 2. The oxidation chamber temperature sensor 20 controls the power of the electric heater 11 to ensure that the temperature of the oxidation chamber in the electric waste gas incinerator 2 is stable (about 600~800℃).

[0036] A circulating air inlet pipe 21 and a circulating air outlet pipe 22 are provided between the exhaust pipe 15 and multiple heating heat exchangers 7. A heating temperature regulating valve 23 installed on the exhaust pipe 15 is provided between the circulating air inlet pipe 21 and the circulating air outlet pipe 22. An air supply temperature sensor 17 is installed on the circulating air supply pipe 4.

[0037] The high-temperature flue gas discharged from the electric heating waste gas incinerator 2 enters the heating heat exchanger 7 through the circulating air inlet pipe 21. The heating heat exchanger 7 exchanges heat with the circulating air that is about to enter the drying chamber 1. The present invention uses the air supply temperature sensor to control the heating temperature regulating valve 23 to regulate the amount of flue gas entering the heating heat exchanger 7, so as to achieve the purpose of stable temperature control.

[0038] A fresh air heat exchanger 25 is installed on the side of the exhaust pipe 15 away from the electric heating waste gas incinerator 2 and multiple heating devices 3. A bypass air passage 26 is provided on the exhaust pipe 15 and branches off from the fresh air heat exchanger 25. A fresh air temperature regulating valve 27 is provided on the bypass air passage 26. A pipe 28 is provided between the fresh air heat exchanger 25 and the electric heating cooling chamber 19. A fresh air fan 29 is provided on the A pipe 28. A pipe 30 is provided between the fresh air heat exchanger 25 and the drying chamber 1. A fresh air temperature sensor 31 is provided on the B pipe 30.

[0039] To balance the gas in the electric heating waste gas incinerator 2, fresh air needs to be supplied to the drying chamber 1 while the flue gas is being extracted and exhausted. The external fresh air first passes through the electric heating cooling chamber 19, which cools the wiring terminals 18 of the electric heater and removes the heat generated by the thermal bridge, thus initially heating the fresh air. After cooling the wiring terminals, the fresh air is sent to the fresh air heat exchanger 25 by the fresh air fan 29. According to the fresh air temperature sensor 31, the fresh air temperature regulating valve 27 is controlled to achieve temperature control of the fresh air, resulting in fresh air at a suitable temperature. The fresh air is then sent to the required location in the drying chamber 1, usually the front and rear air curtains, to reduce the overflow of waste gas and lower the concentration of waste gas in the drying chamber 1.

[0040] The working principle and beneficial effects of this invention are as follows:

[0041] The circulating fan 6 drives hot air through the circulating air supply pipe 4 into the drying chamber 1. After heating the workpiece, the cooled circulating air returns to the heating device 3 through the return air pipe. In this invention, the electric waste gas incinerator 2 supplies high-temperature flue gas to the heating heat exchanger 7 in the heating device 3 to provide heat, so that the heat exchanger is kept at a high temperature and exchanges heat with the circulating air, thereby achieving efficient utilization of heat and forming a closed loop.

[0042] The VOC-containing waste gas generated in the drying chamber 1 is drawn into the incinerator heat exchanger 10 by the waste gas fan 13 for preheating. The preheated waste gas is heated again by the electric heater 11 (the electric heating power is controlled by the oxidation chamber temperature sensor 20 to maintain 600~800℃). The high-temperature waste gas swirls in the oxidation chamber for 0.5~2 seconds to completely oxidize and decompose the VOC.

[0043] The oxidized high-temperature flue gas is divided into two parts: one part provides heat to the incinerator heat exchanger 10, and the other part is discharged through the exhaust pipe 15. Its heat is further used to heat the circulating drying air. At the same time, the external fresh air first flows through the electric heating cooling chamber 19, cools the electric heater terminal 18 and absorbs heat, and then undergoes further heat exchange after initial heating.

[0044] This invention combines centralized electric heating with regional heat distribution to achieve efficient integration of drying and waste gas treatment. The waste gas treatment process design of this invention has significant energy-saving and environmental protection advantages.

[0045] The exhaust gas first enters a heat exchanger for preheating. This process not only increases the temperature of the exhaust gas but also recovers some heat, reducing the energy consumption required for subsequent heating. The preheated exhaust gas is then further heated by an electric heater 11 to reach the high-temperature conditions required for VOC treatment. The treated high-temperature exhaust gas undergoes VOC oxidation and decomposition in an electric exhaust gas incinerator 2, simultaneously transferring heat to subsequent exhaust gas intake, further improving thermal efficiency. Finally, the treated exhaust gas temperature decreases, and this heat is used to power the drying system, achieving highly efficient heat utilization. This design not only saves significant energy consumption but also extends the equipment's lifespan, reduces damage caused by high-temperature operation, and improves the overall performance and economy of the system.

[0046] This invention, through ingenious design, introduces fresh air into the wiring terminal of the electric heater 11, achieving external cooling of the heater 11 while simultaneously utilizing this heat to heat the fresh air. In traditional systems, the heat dissipation of the electric heater 11 is often wasted. This invention, through this design, not only solves the heat dissipation problem at the wiring terminal 18 of the electric heater but also utilizes this heat to preheat the fresh air, further improving the system's thermal efficiency. This design not only saves energy but also reduces equipment damage caused by high-temperature heat dissipation, extending the equipment's lifespan. Furthermore, the preheated fresh air can be used for the air curtain in the drying chamber 1 or other areas requiring heating, further optimizing the overall system performance and improving production efficiency and economy.

[0047] Furthermore, the present invention includes a swirl structure 100 provided in front of multiple electric heaters 11, the swirl structure 100 having a fan frame and multiple fixed swirl blades fixedly connected inside it;

[0048] After the waste gas passes through the swirl structure 100, the strong swirling of the production line enhances the heat exchange effect between the electric heater and the waste gas, making the temperature of the electric heater more uniform and preventing localized high temperatures, thus increasing the lifespan of the electric heater. The swirling also improves the temperature uniformity of the oxidation reaction zone in the incinerator, ensuring the waste gas treatment efficiency.

[0049] This application can further optimize the temperature control inside the incinerator by dynamically allocating the power of the electric heater. The specific steps are as follows:

[0050] Step a, perform data collection, the data including but not limited to: exhaust gas mass flow rate. Inlet temperature of the electric waste gas incinerator VOC concentration and heat loss from the electric waste gas incinerator ;

[0051] Step b: Calculate the total power demand of the electric heater using the following formula. ;

[0052] Specifically: ;in, Indicates the specific heat capacity of exhaust gas. Indicates the target decomposition temperature. This indicates the preheating VOC decomposition efficiency. This indicates the average lower calorific value of VOCs;

[0053] Step c, based on total power demand The total power setpoint of the electric heating system is generated, and the total power is dynamically allocated to multiple electric heater zones distributed along the length of the incinerator according to an adaptive allocation strategy.

[0054] Specifically, this total power setting is to meet the energy required to heat the exhaust gas to the predetermined decomposition temperature.

[0055] For example: if the calculation yields If the power is 100kW, then the total power setting of the electric heating system is set to 100kW, which is the total power output required by the system to achieve the exhaust gas treatment target.

[0056] The total power setpoint determined above is dynamically allocated to multiple electric heater zones arranged along the length of the incinerator according to a certain adaptive allocation strategy. Different zones adjust the allocated power in real time according to their location, temperature requirements, and other factors to ensure a reasonable and stable temperature distribution within the incinerator, meeting the process requirements for waste gas decomposition. For the specific adaptive allocation strategy, please refer to step d.

[0057] Step d: Obtain the real-time temperature of each electric heater zone. And set the target temperature for each electric heater zone. Based on real-time temperature and target temperature Get partition temperature deviation ,and: = Based on the monitored temperature deviation, the power allocation weight of adjacent zone electric heaters is dynamically adjusted. Specifically, if the temperature deviation of a certain zone is large (the actual temperature deviates significantly from the set temperature), the power weight of that zone is increased to allow it to receive more power input and reach the set temperature more quickly.

[0058] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A centralized electrically heated drying and exhaust gas treatment system, characterized in that, The utility model relates to a drying room (1), heating device (3) and the electric heating waste gas incinerator (2) of heating device (3) heat supply, heating device (3) is equipped with circulating air supply pipe (4) and circulating return air pipe (5) between drying room (1), electric heating waste gas incinerator (2) is connected with heating device (3), electric heating waste gas incinerator (2) is connected with drying room (1).

2. The central electric heating drying and exhaust treatment system according to claim 1, characterized in that, The heating device (3) comprises a circulating fan (6), a heating heat exchanger (7) and a filter (8) arranged integrally.

3. The central electric heating drying and exhaust treatment system according to claim 1, wherein, The electric heating waste gas incinerator (2) is internally provided with an incinerator heat exchanger (10) and an electric heater (11), the incinerator heat exchanger (10) is connected with the drying room (1) through a recovery pipeline (12), a waste gas fan (13) is installed on the recovery pipeline (12), and a connecting pipe (14) is arranged between the incinerator heat exchanger (10) and the electric heater (11).

4. The central electric heating drying and exhaust treatment system according to claim 1, characterized in that, The electric heating waste gas incinerator (2) is provided with an exhaust pipe (15) leading to the outside, the exhaust pipe (15) is provided with an incinerator temperature adjusting valve (16), and an incinerator outlet sensor (24) for controlling the opening degree of the incinerator temperature adjusting valve (16) is arranged on one side of the exhaust pipe (15) close to the electric heating waste gas incinerator (2).

5. The central electric heating drying and exhaust treatment system according to claim 1, wherein, The electric heater (11) is provided with a plurality of electric heater wiring ends (18) arranged uniformly in the electric heating waste gas incinerator (2), and the electric heater (11) is provided with an electric heater wiring end (18) arranged outside the electric heating waste gas incinerator (2).

6. The central electric heating drying and exhaust treatment system according to claim 4, wherein, The exhaust pipe (15) and the plurality of heating heat exchangers (7) are provided with a circulating air inlet pipe (21) and a circulating air outlet pipe (22), a heating temperature adjusting valve (23) is installed on the exhaust pipe (15) between the circulating air inlet pipe (21) and the circulating air outlet pipe (22), and an air supply temperature sensor (17) for controlling the opening degree of the heating temperature adjusting valve (23) is installed on the circulating air supply pipe (4).

7. The central electric heating drying and exhaust treatment system according to claim 4, wherein, The exhaust pipe (15) is provided with a fresh air heat exchanger (25) away from the electric heating waste gas incinerator (2) and the plurality of heating devices (3) on one side, a bypass air path (26) is arranged on the exhaust pipe (15) and branches off from the fresh air heat exchanger (25), and the bypass air path (26) is provided with a fresh air temperature adjusting valve (27).

8. The central electric heating drying and exhaust treatment system according to claim 7, characterized in that, The fresh air heat exchanger (25) and the electric heating cooling chamber (19) are provided with an A pipe (28), the A pipe (28) is provided with a fresh air fan (29), the fresh air heat exchanger (25) and the drying room (1) are provided with a B pipe (30), and the B pipe (30) is provided with a fresh air temperature sensor (31).

9. The central electric heating drying and exhaust treatment system according to claim 1, wherein, The oxidation chamber in the electric heating waste gas incinerator (2) is provided with an oxidation chamber temperature sensor (20), the power of the electric heater (11) is controlled by the oxidation chamber temperature sensor (20), the power of the electric heater (11) is dynamically allocated, the temperature in the incinerator is optimized, and the specific steps are as follows: Step a, data acquisition is performed, said data including exhaust mass flow , inlet temperature of the electrically heated exhaust incinerator , concentration of VOCs and heat loss of the electrically heated exhaust incinerator ; Step b, the total demand power of the electric heater (11) is calculated by the following formula ; Specifically: ; wherein, represents the specific heat capacity of the exhaust gas, represents the target decomposition temperature, represents the preheating VOC decomposition efficiency, represents the average low calorific value of the VOC; Step c, based on total demand power generating an electric heating system total power set value, and dynamically distributing the total power to multiple electric heaters (11) sub-zones distributed along the length direction of the incinerator according to an adaptive distribution strategy; Step d, obtain the real-time temperature of each electric heater (11) partition , and set the target temperature of each electric heater (11) partition , according to the real-time temperature and the target temperature , obtain the partition temperature deviation , and: = ; according to the monitored temperature deviation, dynamically adjust the power distribution weight of the adjacent partition electric heater.

10. The central electric heating drying and exhaust treatment system according to claim 2, wherein, A cyclone structure (100) is arranged in front of the multiple electric heaters (11), the cyclone structure (100) has a fan frame and multiple fixed cyclone blades fixedly connected inside the fan frame.

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