Garbage incinerator wall cooling air multi-effect utilization system and working method

Abstract

The invention relates to the technical field of garbage incineration treatment, in particular to a garbage incinerator wall cooling air multi-effect utilization system and a working method. The multiple-effect utilization of the wall cooling air of the garbage incinerator is specifically characterized in that an air valve and a fan are sequentially arranged on a furnace wall cooling air pipeline which passes through a furnace wall and cools the furnace wall, and the furnace wall cooling air pipeline located behind the fan is divided into four branches; the first branch is connected to an outlet of the air preheater, the second branch is connected to an inlet pipeline of an air chamber on the left side of a drying section of the garbage incinerator, the third branch is connected to an inlet pipeline of an air chamber on the right side of the drying section of the garbage incinerator, and the fourth branch is communicated with a garbage pit. By means of the garbage incinerator wall cooling air multi-effect utilization system, energy consumption can be reduced, meanwhile, the service life of each ash hopper and the furnace wall of the garbage incinerator is prolonged, and efficient and stable operation of garbage incinerator equipment is facilitated.

Description

Technical Field

[0001] The invention relates to the technical field of waste incineration treatment, and in particular to a waste incinerator wall cooling wind multi-effect utilization system and a working method. Background Art

[0002] Furnace wall cooling air refers to the cooling air introduced through a specially designed cooling system during the operation of the waste incinerator in order to reduce the furnace wall temperature, protect the furnace structure, extend the equipment life and recover part of the heat loss; boiler room air can also be introduced as cooling air to improve the boiler room environment.

[0003] In the operation of the waste incinerator, the furnace wall cooling air system plays a vital role. In traditional technology, the main function of the furnace wall cooling air is to prevent structural damage and castable falling caused by excessive temperature of the furnace wall by cooling the high-temperature furnace wall, thereby ensuring the stable operation of the incinerator and extending the life of the equipment. This system usually includes cooling fans, air supply ducts, induced air ducts and corresponding control valves.

[0004] At present, the technical characteristics of the furnace wall cooling air utilization method in the prior art are mainly reflected in the following aspects:

[0005] (1) Direct cooling and protection: The cooling air is sent into the furnace wall or surface through the fan, directly exchanging heat with the high-temperature furnace wall, effectively reducing the furnace wall temperature and protecting the furnace structure from high temperature damage. This is the most basic and important function of furnace wall cooling air.

[0006] (2) Heat loss recovery: After leaving the furnace wall, part of the heated cooling air may traditionally be directly discharged into the atmosphere or simply recovered for other low-temperature purposes. However, some technologies have begun to explore how to recover this part of the heat energy more effectively, such as preheating the combustion air through a heat exchanger, or introducing the heated cooling air into the inlet of the primary air-air preheater to improve the heat exchange effect and save the steam consumption of the primary air-air preheater.

[0007] In the field of waste incineration, the furnace wall cooling air system is a key component to ensure the stable operation of the incinerator, and its importance is self-evident. However, although the existing system has achieved certain applications in furnace protection, heat recovery and system optimization, it still faces challenges such as low heat recovery efficiency and insufficient system flexibility. Especially in cold seasons or regions, the garbage bin and other areas in the waste incineration plant have low temperatures, which seriously affects the fermentation efficiency and incineration quality of the garbage, thereby restricting the energy efficiency and environmental performance of the entire incineration process. Summary of the invention

[0008] In view of the above technical problems, the present invention provides a waste incinerator wall cooling air multi-effect utilization system and working method, which efficiently and flexibly utilizes the waste heat resources of the furnace wall cooling air.

[0009] In order to solve the above technical problems, this application provides the following technical solutions:

[0010] A multi-effect utilization system for cooling air of a waste incinerator wall, specifically: a pipe for the cooling air of the furnace wall that passes through the furnace wall and cools the furnace wall is provided with an air valve and a fan in sequence, and the pipe for the cooling air of the furnace wall located after the fan is divided into four branches, namely a first branch connected to the outlet of an air preheater, a second branch connected to the inlet pipe of the left wind chamber of a drying section of the waste incinerator, a third branch connected to the inlet pipe of the right wind chamber of the drying section of the waste incinerator, and a fourth branch leading to a garbage pit.

[0011] Wherein, a first flow measurement point, a first pressure measurement point and a first temperature measurement point are provided at the outlet of the fan.

[0012] Wherein, combustion-supporting air is introduced into the inlet of the air preheater.

[0013] Furthermore, the first branch is provided with a first electromagnetic valve and a second flow measurement point; and a second temperature measurement point is provided on the pipeline behind the connection point between the first branch and the air preheater outlet pipeline.

[0014] Among them, the air entering the left side wind chamber of the drying section is introduced into the inlet pipe of the left side wind chamber of the drying section of the garbage incinerator.

[0015] Furthermore, a second electromagnetic valve and a third flow measuring point are provided on the second branch; a third temperature measuring point is provided on the pipeline behind the connection point between the second branch and the inlet pipe of the left wind chamber of the drying section of the waste incinerator.

[0016] Among them, the air entering the right side wind chamber of the drying section is introduced into the inlet pipe of the right side wind chamber of the drying section of the garbage incinerator.

[0017] Furthermore, a third electromagnetic valve and a fourth flow measuring point are provided on the third branch; a fourth temperature measuring point is provided on the pipeline behind the connection point between the third branch and the inlet pipeline of the right wind chamber of the drying section of the waste incinerator.

[0018] Wherein, the fourth branch is provided with a fourth electromagnetic valve and a fifth flow measurement point.

[0019] It also includes an intelligent monitoring system, which integrates the control of the four electromagnetic valves of the air valve and the fan, as well as the signals of each flow measurement point, temperature measurement point, and pressure measurement point; it monitors the furnace wall cooling air temperature, the air preheater outlet combustion air temperature, and the drying section wind chamber inlet air temperature in real time, and automatically adjusts the opening of the air valve and the four electromagnetic valves according to the changes in parameters to ensure that the air volume of each path is always maintained in the optimal state.

[0020] The working method of the multi-effect utilization system of the waste incinerator wall cooling wind of the present invention comprises the following steps:

[0021] (1) The furnace wall cooling air enters the fan through the air valve;

[0022] (2) The furnace wall cooling air temperature at the fan outlet is set to T01, and the temperature measured at the first temperature measuring point is set to T1. The cooling air volume entering the fan is adjusted by automatically adjusting the opening of the air valve, so that the temperature difference ΔT = |T1-T01| is minimized;

[0023] (3) The standard pressure at the fan outlet is set as P0, and the pressure measured at the first pressure measuring point is set as P1. The fan operating frequency is automatically adjusted to minimize the pressure difference ΔP = |P1-P0|;

[0024] (4) The furnace wall cooling air of the first branch is connected to the outlet of the air preheater through a pipeline: when the combustion air temperature needs to be increased, the first electromagnetic valve is opened; the combustion air temperature after mixing is set to T02, and the temperature measured at the second temperature measuring point is set to T2, and the cooling air volume for mixing is adjusted by automatically adjusting the opening of the first electromagnetic valve to minimize the temperature difference ΔT = |T2-T02|;

[0025] (5) The furnace wall cooling air of the second branch is connected to the inlet of the left wind chamber of the drying section of the incinerator through a pipeline: when the temperature in the drying section needs to be increased, the second electromagnetic valve is opened; the temperature of the mixed air is set to T03, and the temperature measured at the third temperature measuring point is set to T3. The cooling air volume for mixing is adjusted by automatically adjusting the opening of the second electromagnetic valve to minimize the temperature difference ΔT = |T3-T03|;

[0026] (6) The furnace wall cooling air of the third branch is connected to the right wind chamber inlet of the drying section of the incinerator through a pipeline: when the temperature in the drying section needs to be increased, the third electromagnetic valve is opened; the temperature of the mixed air is set to T04, and the temperature measured at the fourth temperature measuring point is set to T4. The cooling air volume for mixing is adjusted by automatically adjusting the opening of the third electromagnetic valve to minimize the temperature difference ΔT = |T4-T04|;

[0027] (7) The furnace wall cooling air of the fourth branch is connected to the garbage pit through a pipeline: the flow rates measured at the first flow measuring point, the second flow measuring point, the third flow measuring point, the fourth flow measuring point and the fifth flow measuring point are Q1, Q2, Q3, Q4 and Q5 respectively. The opening of the fourth electromagnetic valve is automatically adjusted by the difference between the total flow rate at the fan outlet and the flow rate of each branch ΔQ=│Q1-Q2-Q3-Q4│; when the flow difference ΔQ≤0, the opening of the fourth electromagnetic valve is 0%; when the flow difference ΔQ>0, the opening of the fourth electromagnetic valve is automatically adjusted to make the Q5 value close to ΔQ.

[0028] Compared with the prior art, the garbage incinerator wall cooling wind multi-effect utilization system and working method of the present invention have at least the following beneficial effects:

[0029] The garbage incinerator wall cooling wind multi-effect utilization system of the present invention can reduce energy consumption, while improving the service life of each ash hopper and furnace wall of the garbage incinerator, which is beneficial to the efficient and stable operation of the garbage incinerator equipment.

[0030] (1) Efficient recovery and reuse: The system of the present invention realizes efficient recovery and reuse of waste heat from the furnace wall cooling air by optimizing the flow direction and distribution of the furnace wall cooling air, which not only improves the overall energy efficiency of the incinerator, but also reduces the waste of heat energy and environmental pollution.

[0031] (2) Intelligent regulation and flexible adjustment are achieved: Intelligent regulation makes the distribution and utilization of furnace wall cooling air more flexible and efficient; real-time monitoring and automatic adjustment can ensure that the furnace wall cooling air can achieve the best utilization effect under different working conditions.

[0032] (3) Improved incineration efficiency and stability: By preheating the combustion air, heating the garbage pit, and preheating the garbage in the drying section, the system of the present invention effectively improves the incineration efficiency and stability, reduces the pollutant emissions caused by incomplete combustion, and improves the environmental performance of the incinerator.

[0033] (4) Enhanced environmental performance: By improving combustion efficiency and reducing pollutant emissions caused by incomplete combustion, the system of the present invention helps to improve the environmental performance of waste incineration plants, which is of great significance for improving air quality and protecting the ecological environment.

[0034] (5) Improved intelligence level: Through intelligent monitoring, the system of the present invention has a high level of intelligence, which not only improves the operating efficiency and stability of the system, but also provides convenience for subsequent equipment maintenance and upgrades.

[0035] The waste incinerator wall cooling air multi-effect utilization system and working method of the present invention will be further described below in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1It is a schematic diagram of the multi-effect utilization system of the waste incinerator wall cooling wind of the present invention.

[0037] Among them, 101-furnace wall cooling air, 102-air valve, 103-fan, 104-first flow measurement point, 105-first pressure measurement point, 106-first temperature measurement point;

[0038] 201-combustion air, 202-air preheater, 203-first electromagnetic valve, 204-second flow measurement point, 205-second temperature measurement point;

[0039] 301 - air entering the left wind chamber of the drying section, 302 - the second electromagnetic valve, 303 - the third flow measurement point, 304 - the third temperature measurement point;

[0040] 401-air entering the right wind chamber of the drying section, 402-third solenoid valve, 403-fourth flow measurement point, 404-fourth temperature measurement point;

[0041] 501-the fourth electromagnetic valve, 502-the fifth flow measurement point. DETAILED DESCRIPTION

[0042] like Figure 1 As shown, a multi-effect utilization system of cooling air of a waste incinerator wall, specifically: a pipe of the furnace wall cooling air 101 that passes through the furnace wall and cools the furnace wall is provided with a wind valve 102 and a fan 103 in sequence, and the pipe of the furnace wall cooling air 101 located after the fan 103 is divided into four branches, namely a first branch connected to the outlet of the air preheater 202, a second branch connected to the inlet pipe of the left wind chamber of the drying section of the waste incinerator, a third branch connected to the inlet pipe of the right wind chamber of the drying section of the waste incinerator, and a fourth branch leading to a garbage pit, thereby realizing multi-effect recovery and reuse of the waste heat of the furnace wall cooling air.

[0043] The primary task of furnace wall cooling and air valve control of furnace wall cooling air is to reduce the furnace wall temperature and protect the furnace structure. In this process, the air valve 102 plays a vital role. By adjusting the opening of the air valve 102 to control the furnace wall cooling air volume, the furnace wall cooling air temperature T1 can be effectively controlled, and the cooling air can be ensured to enter the fan 103 at an appropriate flow rate.

[0044] The outlet of the fan 103 is provided with a first flow measurement point 104, a first pressure measurement point 105 and a first temperature measurement point 106. After the cooling air passes through the air valve 102 and enters the fan 103, a higher flow rate and pressure are obtained through the pressurization effect of the fan, which provides the possibility for subsequent refined distribution. The fan outlet pressure P1 can be effectively controlled by adjusting the fan operating frequency to ensure that it can meet the air volume and air pressure requirements under different working conditions.

[0045] The inlet of the air preheater 202 is connected to the combustion air 201. The first branch is provided with a first electromagnetic valve 203 and a second flow measuring point 204; a second temperature measuring point 205 is provided on the pipeline behind the connection point between the first branch and the outlet pipe of the air preheater 202. The cooling air of the first branch is guided to the outlet of the air preheater, where it is mixed with the combustion air that is about to enter the incinerator to increase the temperature of the combustion air, thereby enhancing the combustion efficiency and reducing pollutants produced by incomplete combustion. By adjusting the opening of the first electromagnetic valve 203 on this path, the amount of furnace wall cooling air entering this path is controlled, so that the temperature T2 of the mixed combustion air can be effectively controlled to ensure that the combustion air achieves the best preheating effect.

[0046] The air 301 entering the left wind chamber of the drying section of the garbage incinerator is introduced into the inlet pipe of the left wind chamber of the drying section. A second electromagnetic valve 302 and a third flow measuring point 303 are provided on the second branch; a third temperature measuring point 304 is provided on the pipeline behind the connection point between the second branch and the inlet pipe of the left wind chamber of the drying section of the garbage incinerator. The cooling air of the second branch is connected to the inlet pipe of the left wind chamber of the drying section of the garbage incinerator. In the drying section, the moisture in the garbage needs to be evaporated quickly to improve the incineration efficiency. By introducing the waste heat in the cooling air, the temperature in the drying section is increased, which accelerates the drying process of the garbage. By adjusting the opening of the second electromagnetic valve 302 on this path, the amount of cooling air entering the furnace wall is controlled, so that the temperature T3 of the mixed air can be effectively controlled to ensure the best drying effect.

[0047] The air 401 entering the right wind chamber of the drying section of the garbage incinerator is introduced into the inlet pipe of the right wind chamber of the drying section. The third branch is provided with a third electromagnetic valve 402 and a fourth flow measuring point 403; a fourth temperature measuring point 404 is provided on the pipeline behind the connection point between the third branch and the inlet pipe of the right wind chamber of the drying section of the garbage incinerator. The cooling air of the third branch is connected to the inlet pipe of the right wind chamber of the drying section of the garbage incinerator. In the drying section, the moisture in the garbage needs to be evaporated quickly to improve the incineration efficiency. By introducing the waste heat in the cooling air, the temperature in the drying section is increased, which accelerates the drying process of the garbage. By adjusting the opening of the third electromagnetic valve 402 on this path, the amount of cooling air entering the furnace wall is controlled, so that the temperature T4 of the mixed air can be effectively controlled to ensure the best drying effect.

[0048] The fourth branch is provided with a fourth electromagnetic valve 501 and a fifth flow measuring point 502. The cooling air of the fourth branch is led into the garbage pit. In cold seasons or regions, the temperature in the garbage pit is often low, which will affect the fermentation efficiency and quality of the garbage. By introducing the waste heat in the furnace wall cooling air, the temperature in the garbage pit is effectively increased, creating favorable conditions for the fermentation of the garbage. The fourth electromagnetic valve 501 on this path can be balanced and adjusted according to the cooling air volume at the outlet of the fan 103 and the cooling air volume of the first three routes, which ensures that the furnace wall cooling air can be fully utilized while increasing the temperature of the garbage pit.

[0049] In order to maximize the benefits of the multi-effect utilization technology of furnace wall cooling air, an intelligent monitoring system is also equipped. The system adopts remote centralized control means, integrating the control of air valve 102, four electromagnetic valves and fan 103 as well as the signals of each measuring point. It can monitor key parameters such as furnace wall cooling air temperature, air preheater outlet combustion air temperature and drying section air chamber inlet air temperature in real time, and automatically adjust the opening of air valve 102 and four electromagnetic valves according to the changes of these parameters to ensure that the air volume of each path is always kept in the optimal state. In addition, the intelligent monitoring system also has fault warning and diagnosis functions, which can issue an alarm in time when the equipment is abnormal, and provide corresponding solutions to ensure the stable operation of the system.

[0050] The working method of the multi-effect utilization system of the waste incinerator wall cooling wind comprises the following steps:

[0051] (1) The furnace wall cooling air enters the fan through the air valve;

[0052] (2) The furnace wall cooling air temperature at the fan outlet is set to T01, and the temperature measured at the first temperature measuring point is set to T1. The cooling air volume entering the fan is adjusted by automatically adjusting the opening of the air valve, so that the temperature difference ΔT = |T1-T01| is minimized;

[0053] (3) The standard pressure at the fan outlet is set as P0, and the pressure measured at the first pressure measuring point is set as P1. The fan operating frequency is automatically adjusted to minimize the pressure difference ΔP = |P1-P0|;

[0054] (4) The furnace wall cooling air of the first branch is connected to the outlet of the air preheater through a pipeline: when the combustion air temperature needs to be increased, the first electromagnetic valve is opened; the combustion air temperature after mixing is set to T02, and the temperature measured at the second temperature measuring point is set to T2, and the cooling air volume for mixing is adjusted by automatically adjusting the opening of the first electromagnetic valve to minimize the temperature difference ΔT = |T2-T02|;

[0055] (5) The furnace wall cooling air of the second branch is connected to the inlet of the left wind chamber of the drying section of the incinerator through a pipeline: when the temperature in the drying section needs to be increased, the second electromagnetic valve is opened; the temperature of the mixed air is set to T03, and the temperature measured at the third temperature measuring point is set to T3. The cooling air volume for mixing is adjusted by automatically adjusting the opening of the second electromagnetic valve to minimize the temperature difference ΔT = |T3-T03|;

[0056] (6) The furnace wall cooling air of the third branch is connected to the right wind chamber inlet of the drying section of the incinerator through a pipeline: when the temperature in the drying section needs to be increased, the third electromagnetic valve is opened; the temperature of the mixed air is set to T04, and the temperature measured at the fourth temperature measuring point is set to T4. The cooling air volume for mixing is adjusted by automatically adjusting the opening of the third electromagnetic valve to minimize the temperature difference ΔT = |T4-T04|;

[0057] (7) The furnace wall cooling air of the fourth branch is connected to the garbage pit through a pipeline: the flow rates measured at the first flow measuring point, the second flow measuring point, the third flow measuring point, the fourth flow measuring point and the fifth flow measuring point are Q1, Q2, Q3, Q4 and Q5 respectively. The opening of the fourth electromagnetic valve is automatically adjusted by the difference between the total flow rate at the fan outlet and the flow rate of each branch ΔQ=│Q1-Q2-Q3-Q4│; when the flow difference ΔQ≤0, the opening of the fourth electromagnetic valve is 0%; when the flow difference ΔQ>0, the opening of the fourth electromagnetic valve is automatically adjusted to make the Q5 value close to ΔQ.

[0058] The system can efficiently and flexibly utilize the waste heat resources of the furnace wall cooling air, including:

[0059] (1) Heating the garbage bin: Using the waste heat from the cooling air of the furnace wall to provide a stable heat source for the garbage bin, ensuring that the garbage is fermented under suitable temperature conditions, improving the fermentation efficiency and garbage quality, and laying a good foundation for the subsequent incineration process.

[0060] (2) Preheating the combustion air: The heat energy in the cooling air is used to preheat the combustion air, thereby increasing the temperature of the combustion air, thereby enhancing the combustion efficiency, reducing pollutants produced by incomplete combustion, and improving the environmental performance of the incinerator.

[0061] (3) Preheating the drying section of the waste incinerator: By rationally allocating cooling air and introducing it into the drying section of the incinerator, the waste entering the incinerator is preheated and dried, thereby reducing the moisture content in the waste and improving the incineration efficiency and stability.

[0062] (4) Combination of system flexibility and high efficiency: An intelligent adjustment system is used to automatically adjust the distribution ratio and flow direction of cooling air according to actual needs, ensuring that the above three utilization methods can be organically combined to achieve maximum utilization of thermal energy and flexible and efficient operation of the system.

[0063] The embodiments described above are merely descriptions of preferred implementation modes of the present invention and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should all fall within the protection scope determined by the claims of the present invention.

Claims

1. A multi-effect utilization system for cooling air of a garbage incinerator wall, characterized in that: A pipe for furnace wall cooling air (101) that passes through the furnace wall and cools the furnace wall is provided with an air valve (102) and a fan (103) in sequence. The pipe for furnace wall cooling air (101) located after the fan (103) is divided into four branches, namely a first branch connected to the outlet of the air preheater (202), a second branch connected to the inlet pipe of the left wind chamber of the drying section of the waste incinerator, a third branch connected to the inlet pipe of the right wind chamber of the drying section of the waste incinerator, and a fourth branch leading to a waste pit.

2. The multi-effect utilization system for cooling air of waste incinerator wall according to claim 1 is characterized in that: A first flow measurement point (104), a first pressure measurement point (105) and a first temperature measurement point (106) are provided at the outlet of the fan (103).

3. The multi-effect utilization system for cooling air of a garbage incinerator wall according to claim 2 is characterized in that: The combustion-supporting air (201) is introduced into the inlet of the air preheater (202).

4. The multi-effect utilization system for cooling air of a garbage incinerator wall according to claim 3 is characterized in that: The first branch is provided with a first electromagnetic valve (203) and a second flow measurement point (204); and a second temperature measurement point (205) is provided on the pipeline behind the connection point between the first branch and the outlet pipeline of the air preheater (202).

5. The multi-effect utilization system for cooling air of the waste incinerator wall according to claim 4 is characterized in that: The air (301) entering the left wind chamber of the drying section is introduced into the inlet pipe of the left wind chamber of the drying section of the waste incinerator.

6. The multi-effect utilization system for cooling air of the waste incinerator wall according to claim 5 is characterized in that: The second branch is provided with a second electromagnetic valve (302) and a third flow measurement point (303); a third temperature measurement point (304) is provided on the pipeline behind the connection point between the second branch and the inlet pipeline of the left wind chamber of the drying section of the waste incinerator.

7. The multi-effect utilization system for cooling air of the waste incinerator wall according to claim 6 is characterized in that: The air (401) entering the right wind chamber of the drying section of the waste incinerator is introduced into the inlet pipe of the right wind chamber of the drying section; the third branch is provided with a third electromagnetic valve (402) and a fourth flow measurement point (403); and a fourth temperature measurement point (404) is provided on the pipeline behind the connection point between the third branch and the inlet pipe of the right wind chamber of the drying section of the waste incinerator.

8. The multi-effect utilization system for cooling air of waste incinerator wall according to claim 7 is characterized in that: The fourth branch line is provided with a fourth electromagnetic valve (501) and a fifth flow measurement point (502).

9. The waste incinerator wall cooling air multi-effect utilization system according to claim 8, characterized in that: The intelligent monitoring system also includes an intelligent monitoring system, which integrates the control of the air valve (102), four electromagnetic valves and the fan (103) as well as the signals of each flow measurement point, temperature measurement point and pressure measurement point; monitors the furnace wall cooling air temperature, the air preheater outlet combustion air temperature and the drying section air chamber inlet air temperature in real time, and automatically adjusts the opening of the air valve (102) and the four electromagnetic valves according to the changes in the parameters, so as to ensure that the air volume of each path is always maintained in the optimal state.

10. The working method of the waste incinerator wall cooling air multi-effect utilization system according to any one of claims 1 to 9, characterized in that: The following steps are involved: (1) The furnace wall cooling air enters the fan through the air valve; (2) The furnace wall cooling air temperature at the fan outlet is set to T01, and the temperature measured at the first temperature measuring point is set to T1. The cooling air volume entering the fan is adjusted by automatically adjusting the opening of the air valve, so that the temperature difference ΔT = |T1-T01| is minimized; (3) Set the standard pressure at the fan outlet as P0, the pressure measured at the first pressure measuring point as P1, and automatically adjust the fan operating frequency to minimize the pressure difference ΔP = |P1-P0|; (4) The furnace wall cooling air of the first branch is connected to the outlet of the air preheater through a pipeline: when the combustion air temperature needs to be increased, the first electromagnetic valve is opened; the combustion air temperature after mixing is set to T02, and the temperature measured at the second temperature measuring point is set to T2, and the cooling air volume for mixing is adjusted by automatically adjusting the opening of the first electromagnetic valve to minimize the temperature difference ΔT = |T2-T02|; (5) The furnace wall cooling air of the second branch is connected to the inlet of the left wind chamber of the drying section of the incinerator through a pipeline: when the temperature in the drying section needs to be increased, the second electromagnetic valve is opened; the temperature of the mixed air is set to T03, and the temperature measured at the third temperature measuring point is set to T3. The cooling air volume for mixing is adjusted by automatically adjusting the opening of the second electromagnetic valve to minimize the temperature difference ΔT = |T3-T03|; (6) The furnace wall cooling air of the third branch is connected to the right wind chamber inlet of the drying section of the incinerator through a pipeline: when the temperature in the drying section needs to be increased, the third electromagnetic valve is opened; the temperature of the mixed air is set to T04, and the temperature measured at the fourth temperature measuring point is set to T4. The cooling air volume for mixing is adjusted by automatically adjusting the opening of the third electromagnetic valve to minimize the temperature difference ΔT = |T4-T04|; (7) The furnace wall cooling air of the fourth branch is connected to the garbage pit through a pipeline: the flow rates measured at the first flow measuring point, the second flow measuring point, the third flow measuring point, the fourth flow measuring point and the fifth flow measuring point are Q1, Q2, Q3, Q4 and Q5 respectively. The opening of the fourth electromagnetic valve is automatically adjusted by the difference between the total flow rate at the fan outlet and the flow rate of each branch ΔQ=│Q1-Q2-Q3-Q4│; When the flow difference ΔQ≤0, the opening of the fourth electromagnetic valve is 0%; When the flow difference ΔQ>0, the opening of the fourth electromagnetic valve is automatically adjusted to make the Q5 value close to ΔQ.

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