A secondary combustion chamber device for treating pyrolysis flue gas of domestic waste

Abstract

The present invention relates to the technical field of flue gas treatment, and particularly to a secondary combustion chamber device for treating pyrolysis flue gas of domestic waste, including: a flue gas mixing and heat storage chamber, which is arranged at the lower part of the secondary combustion chamber and is used for transferring the heat of high-temperature flue gas to the inside of the heat storage body, the high-thermal-conductivity heat storage plate and releasing it to the combustion-supporting air during the heat exchange process between the flue gas and the air; a combustion chamber, which is arranged at the upper part of the heat storage area and is used for burning the flue gas to be treated; a high-temperature combustion chamber, which is arranged at the upper part of the combustion chamber and is used for fully burning the flue gas to be treated; the high-temperature combustion chamber includes a second temperature sensor for detecting the temperature in the high-temperature combustion chamber and a swirl vane for guiding the flue gas to generate swirl in the chamber; a tail gas outlet, which is arranged at the top of the secondary combustion chamber and is used for discharging the completely burned gas; the present invention adjusts the operating parameters of each component to the corresponding values according to the operating conditions of the secondary combustion chamber in the absence of combustion-supporting facilities, effectively improving the combustion efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of flue gas treatment, and particularly relates to a secondary combustion chamber device for treating pyrolysis flue gas of domestic waste. Background Art

[0002] In recent years, with the rapid development of the economic society, the environmental pollution in urban and rural areas of our country has gradually increased, environmental problems have become increasingly prominent, and the pollution situation is facing severe challenges. This has attracted the high attention and wide concern of all sectors of society. The technology of pyrolysis and incineration treatment of rural domestic waste has been widely applied continuously. Whether the flue gas treatment process can meet the national emission standards is the focus of attention in the industry and environmental protection supervision.

[0003] The secondary combustion technology of flue gas is particularly important. It is the key factor affecting whether the pyrolysis flue gas treatment can meet the emission standards and is a necessary device for waste pyrolysis and incineration furnaces. Currently, there are many types of secondary combustion chamber devices supporting flue gas purification equipment, and basically all of them are high-energy-consuming products with quite high operating costs. The long-term high usage costs are difficult for the owners to bear, resulting in very few secondary combustion chamber devices that can operate normally. Excessive use of auxiliary fuels generates new pollution sources, causing the flue gas emissions to fail to meet the standards and serious secondary pollution, and there is no technical guarantee. Therefore, it is of great significance to research, invent and produce a secondary combustion chamber device for flue gas that can continuously burn, has excellent performance, and is energy-efficient and zero-consumption.

[0004] Chinese Patent Publication No.: CN115342342A discloses a secondary combustion chamber flue gas treatment device, including a secondary combustion chamber. There is a smoke outlet arranged on the side of the secondary combustion chamber, a pressure gauge is placed above the smoke outlet, an air inlet is installed on the side of the secondary combustion chamber, a secondary combustion chamber shell is arranged inside the secondary combustion chamber, a secondary air inlet device is installed inside the secondary combustion chamber shell, a combustion-supporting device is arranged inside the secondary air inlet device, a guiding pipe is placed inside the combustion-supporting device, a fan is installed inside the guiding pipe, an oil pipe is placed at the end of the guiding pipe, and an atomizing nozzle is installed inside the oil pipe.

[0005] It can be seen that the above-mentioned technology cannot adjust the operating parameters of each component to the corresponding values according to the operating conditions of the secondary combustion chamber in the absence of combustion-supporting facilities, resulting in low combustion efficiency. Summary of the Invention

[0006] Therefore, the present invention provides a secondary combustion chamber device for treating pyrolysis flue gas of domestic waste to overcome the problem in the prior art that the combustion efficiency is low because the operating parameters of each component are adjusted to the corresponding values according to the operating conditions of the secondary combustion chamber in the absence of combustion-supporting facilities.

[0007] To achieve the above object, the secondary combustion chamber device for treating pyrolysis flue gas of domestic waste of the present invention includes:

[0008] A flue gas inlet, which is arranged on one side of the secondary combustion chamber and is used for accessing the flue gas to be treated;

[0009] The flue gas mixing regenerator is arranged at the lower part of the secondary combustion chamber and is used to transfer the heat of the high-temperature flue gas to the inside of the regenerator body, the high-thermal-conductivity regenerator plate and release it to the combustion-supporting air during the heat exchange process between the flue gas and the air; the flue gas mixing regenerator includes an air inlet oxygen adjustment valve, an oxygen-increasing air flow diversion valve and a heat exchange air reversing valve;

[0010] The combustion chamber is arranged above the flue gas mixing regenerator and is used to burn the flue gas to be treated; the combustion chamber includes a gas pressure adjustment valve for adjusting the pressure, an observation port for observing the situation and a first temperature sensor for detecting the temperature inside the combustion chamber; the combustion chamber is connected to the flue gas mixing regenerator through a regenerative zone;

[0011] The high-temperature combustion chamber is arranged above the combustion chamber and is used to fully burn the flue gas to be treated; the high-temperature combustion chamber includes a second temperature sensor for detecting the temperature inside the high-temperature combustion chamber and a swirl vane for guiding the flue gas to generate swirl inside the chamber;

[0012] The tail gas outlet is arranged at the top of the secondary combustion chamber and is used to discharge the completely burned gas;

[0013] The detection unit is respectively connected to the first temperature sensor and the second temperature sensor and is used to detect the temperatures of the combustion chamber and the high-temperature combustion chamber respectively; the detection unit also includes a mass spectrometer for detecting the dioxin content at the flue gas inlet and the tail gas outlet;

[0014] The determination unit is respectively connected to the corresponding components in the detection unit and is used to determine whether the operation status of the secondary combustion chamber meets the standard according to the decomposition rate of dioxin in the flue gas. When it is initially determined that the operation status of the secondary combustion chamber does not meet the standard, the preset standard decomposition rate is corrected according to the difference between the second preset standard decomposition rate and the decomposition rate. And when it is determined that the operation status of the secondary combustion chamber does not meet the standard, the reason for the non-compliance of the operation status of the secondary combustion chamber is determined according to the difference between the decomposition rate and the first preset standard decomposition rate;

[0015] The adjustment unit is respectively connected to the oxygen-increasing air flow diversion valve, the heat exchange air reversing valve, the swirl vane and the determination unit and is used to adjust the valve opening of the oxygen-increasing air flow diversion valve, the valve opening of the heat exchange air reversing valve and the rotation speed of the swirl vane to the corresponding values according to the determination result output by the determination unit.

[0016] Further, for a single cycle, the determination unit obtains the decomposition rate of dioxin according to the dioxin content at the flue gas inlet and the tail gas outlet measured by the detection unit under the first preset condition. The determination method for the determination unit to determine whether the operation status of the secondary combustion chamber meets the standard according to the decomposition rate of dioxin, where,

[0017] The first determination method is that the determination unit determines that the operating condition of the secondary combustion chamber does not meet the standard, and determines the reason why the operating condition of the secondary combustion chamber does not meet the standard according to the difference between the decomposition rate and the first preset standard decomposition rate; the first determination method satisfies that the decomposition rate is less than the first preset standard decomposition rate;

[0018] The second determination method is that the determination unit preliminarily determines that the operating condition of the secondary combustion chamber does not meet the standard, and corrects the preset standard decomposition rate according to the difference between the second preset standard decomposition rate and the decomposition rate; the second determination method satisfies that the decomposition rate is greater than or equal to the first preset standard decomposition rate and less than or equal to the second preset standard decomposition rate, where the first preset standard decomposition rate is less than the second preset standard decomposition rate;

[0019] The third determination method is that the determination unit determines that the operating condition of the secondary combustion chamber meets the standard, and controls the detection unit to detect the content of dioxins at the flue gas inlet and the tail gas outlet in the next cycle; the third determination method satisfies that the decomposition rate is greater than the second preset standard decomposition rate;

[0020] The first preset condition is that the determination unit determines that the flue gas is completely burned out in this cycle.

[0021] Further, the determination unit determines the reason why the operating condition of the secondary combustion chamber does not meet the standard according to the difference between the decomposition rate and the first preset standard decomposition rate in the first determination method, where,

[0022] The first cause determination method is that the determination unit determines that the reason why the operating condition of the secondary combustion chamber does not meet the standard is that the flue gas is not in sufficient contact with air, and makes a secondary determination of the reason for the insufficient contact between the flue gas and air according to the first temperature of the combustion chamber; the first cause determination method satisfies that the difference between the decomposition rate and the first preset standard decomposition rate is less than or equal to the first preset standard low difference set by the determination unit;

[0023] The second cause determination method is that the determination unit determines that the reason why the operating condition of the secondary combustion chamber does not meet the standard is that the flue gas is not completely burned, and determines the adjustment method of the rotational speed of the swirl vane according to the turbulence intensity; the second cause determination method satisfies that the difference between the decomposition rate and the first preset standard decomposition rate is greater than the first preset standard low difference and less than or equal to the second preset standard low difference set by the determination unit, where the first preset standard low difference is less than the second preset standard low difference;

[0024] The third cause determination method is that the determination unit determines that the reason why the operating condition of the secondary combustion chamber does not meet the standard is that the heat exchange efficiency of the secondary combustion chamber does not meet the standard, and adjusts the opening degree of the heat exchange air changeover valve according to the second temperature of the high-temperature combustion chamber; the third cause determination method satisfies that the difference between the decomposition rate and the first preset standard decomposition rate is greater than the second preset standard low difference.

[0025] Further, the adjustment unit determines the correction method of the preset standard decomposition rate according to the difference between the second preset standard decomposition rate and the decomposition rate in the second determination method, where,

[0026] The first correction method is that the adjustment unit uses a first correction coefficient to correct the preset standard decomposition rate to a corresponding value; the first correction method satisfies that the difference between the second preset standard decomposition rate and the decomposition rate is less than or equal to the first preset standard excessive difference set by the adjustment unit;

[0027] The second correction method is that the adjustment unit uses a second correction coefficient to correct the preset standard decomposition rate to a corresponding value; the second correction method satisfies that the difference between the second preset standard decomposition rate and the decomposition rate is greater than the first preset standard excessive difference and less than or equal to the second preset standard excessive difference set by the adjustment unit, where the first preset standard excessive difference is less than the second preset standard excessive difference;

[0028] The third correction method is that the adjustment unit uses a third correction coefficient to correct the preset standard decomposition rate to a corresponding value; the third correction method satisfies that the difference between the second preset standard decomposition rate and the decomposition rate is greater than the second preset standard excessive difference.

[0029] Further, the determination unit determines the secondary determination method of the reason for insufficient contact between the flue gas and the air according to the first temperature of the combustion chamber in the first reason determination method, where,

[0030] The first secondary determination method is that the determination unit determines that the insufficient contact between the flue gas and the air is due to the short residence time of the flue gas, and adjusts the residence time of the flue gas to a corresponding value according to the difference between the preset standard temperature and the first temperature; the first secondary determination method satisfies that the first temperature is less than or equal to the preset standard temperature;

[0031] The second secondary determination method is that the determination unit determines that the insufficient contact between the flue gas and the air is due to the low oxygen content, and adjusts the opening of the oxygen-increasing flow guiding valve to a corresponding value according to the difference between the first temperature and the preset standard temperature; the second secondary determination method satisfies that the first temperature is greater than the preset standard temperature.

[0032] Further, the adjustment unit determines the adjustment method of the rotational speed of the swirl vane according to the turbulence intensity in the second reason determination method, where,

[0033] The first rotational speed adjustment method is that the adjustment unit uses a first rotational speed adjustment coefficient to adjust the rotational speed of the swirl vane to a corresponding value; the first rotational speed adjustment method satisfies that the turbulence intensity is less than or equal to the first preset standard turbulence intensity set by the adjustment unit;

[0034] The second rotational speed adjustment method is that the adjustment unit uses a second rotational speed adjustment coefficient to adjust the rotational speed of the swirl vane to a corresponding value; the second rotational speed adjustment method satisfies that the turbulence intensity is greater than the first preset standard turbulence intensity and less than or equal to the second preset standard turbulence intensity set by the adjustment unit, where the first preset standard turbulence intensity is less than the second preset standard turbulence intensity;

[0035] The third rotational speed adjustment method is that the adjustment unit uses a third rotational speed adjustment coefficient to adjust the rotational speed of the swirl vane to a corresponding value; the third rotational speed adjustment method satisfies that the turbulence intensity is greater than the second preset standard turbulence intensity.

[0036] Furthermore, the adjustment unit determines the opening degree of the heat exchange air reversing valve according to the second temperature of the high-temperature combustion chamber in the third cause determination method, where,

[0037] The first opening degree adjustment method is that the adjustment unit uses a first opening degree adjustment coefficient to adjust the opening degree of the heat exchange air reversing valve to a corresponding value; the first opening degree adjustment method satisfies that the second temperature is less than or equal to the first preset standard excessive temperature set by the adjustment unit;

[0038] The second opening degree adjustment method is that the adjustment unit uses a second opening degree adjustment coefficient to adjust the opening degree of the heat exchange air reversing valve to a corresponding value; the second opening degree adjustment method satisfies that the second temperature is greater than the first preset standard excessive temperature and less than or equal to the second preset standard excessive temperature set by the adjustment unit, where the first preset standard excessive temperature is less than the second preset standard excessive temperature;

[0039] The third opening degree adjustment method is that the adjustment unit uses a third opening degree adjustment coefficient to adjust the opening degree of the heat exchange air reversing valve to a corresponding value; the third opening degree adjustment method satisfies that the second temperature is greater than the second preset standard turbulence intensity.

[0040] Furthermore, the adjustment unit determines the adjustment method of the residence time of the flue gas according to the difference between the preset standard temperature and the first temperature in the first secondary determination method, where,

[0041] The first time adjustment method is that the adjustment unit uses a first time adjustment coefficient to adjust the residence time of the flue gas to a corresponding value; the first time adjustment method satisfies that the difference between the preset standard temperature and the first temperature is less than or equal to the first preset standard low temperature difference set by the adjustment unit;

[0042] The second time adjustment method is that the adjustment unit adjusts the residence time of the flue gas to the corresponding value using the second time adjustment coefficient; the second time adjustment method satisfies that the difference between the preset standard temperature and the first temperature is greater than the first preset standard low temperature difference and less than or equal to the second preset standard low temperature difference set by the adjustment unit, where the first preset standard low temperature difference is less than the second preset standard low temperature difference;

[0043] The third time adjustment method is that the adjustment unit adjusts the residence time of the flue gas to the corresponding value using the third time adjustment coefficient; the third time adjustment method satisfies that the difference between the preset standard temperature and the first temperature is greater than the second preset standard low temperature difference.

[0044] Furthermore, the adjustment method for the adjustment unit to determine the opening degree of the oxygen-enriched air flow diversion valve according to the difference between the first temperature and the preset standard temperature in the second secondary determination method is as follows, where

[0045] The first valve opening degree adjustment method is that the adjustment unit adjusts the opening degree of the oxygen-enriched air flow diversion valve to the corresponding value using the first valve opening degree adjustment coefficient; the first valve opening degree adjustment method satisfies that the difference between the first temperature and the preset standard temperature is less than or equal to the first preset standard high temperature difference set by the adjustment unit;

[0046] The second valve opening degree adjustment method is that the adjustment unit adjusts the opening degree of the oxygen-enriched air flow diversion valve to the corresponding value using the second valve opening degree adjustment coefficient; the second valve opening degree adjustment method satisfies that the difference between the first temperature and the preset standard temperature is greater than the first preset standard high temperature difference and less than or equal to the second preset standard high temperature difference set by the adjustment unit, where the first preset standard high temperature difference is less than the second preset standard high temperature difference;

[0047] The third valve opening degree adjustment method is that the adjustment unit adjusts the opening degree of the oxygen-enriched air flow diversion valve to the corresponding value using the third valve opening degree adjustment coefficient; the third valve opening degree adjustment method satisfies that the difference between the first temperature and the preset standard temperature is greater than the second preset standard high temperature difference.

[0048] Furthermore, a water tank is also arranged at the bottom of the secondary combustion chamber to collect dust.

[0049] Compared with the prior art, the beneficial effects of the present invention are as follows. The present invention judges whether the operation status of the secondary combustion chamber meets the preset standard according to the decomposition rate of dioxins in the flue gas. When it is determined that the operation status of the secondary combustion chamber does not meet the preset standard, the reasons are analyzed, and the operation parameters of the corresponding components are adjusted to the corresponding values respectively for different reasons, effectively improving the combustion efficiency of the secondary combustion chamber. At the same time, the present invention uses high heat storage, high strength refractory and corrosion-resistant materials without auxiliary combustion facilities, making the secondary combustion chamber a powerful heat storage body, thereby improving the combustion efficiency, saving energy and reducing consumption, and greatly saving the operation cost.

[0050] Furthermore, the present invention sets two to three temperature field spaces in the space of the secondary combustion chamber, that is, the lower part is the flue gas mixing and heat storage chamber, and successively upwards are the heat storage area, the combustion chamber, and the high-temperature combustion chamber. By setting the heat storage area, the flue gas and air are fully contacted to generate heat exchange, ensuring sufficient temperature for combustion. At the same time, the low-temperature combustion chamber and the high-temperature combustion chamber are set to ensure the full combustion of the flue gas, effectively improving the combustion efficiency of the secondary combustion chamber.

[0051] Furthermore, the present invention uses a mass spectrometer to detect the content of dioxins at the flue gas inlet and the tail gas outlet respectively, obtains the decomposition rate of dioxins, and judges whether the operation status of the secondary combustion chamber meets the standard by analyzing the decomposition of dioxins. The present invention judges whether the combustion is complete by analyzing the degradation of a component in the flue gas, fully ensuring the combustion process, avoiding incomplete combustion and causing secondary pollution to the environment, and further improving the combustion efficiency of the secondary combustion chamber.

[0052] Furthermore, when it is determined that the operation status of the secondary combustion chamber does not meet the standard, the reason for the non-compliance of the operation status of the secondary combustion chamber is determined according to the difference between the decomposition rate and the first preset standard decomposition rate. Through the analysis of the reason, corresponding adjustments are made to the corresponding components, avoiding improper adjustment and resulting in the discharged gas not meeting the requirements and causing secondary pollution.

[0053] Furthermore, when it is determined that the reason for the non-compliance of the operation status of the secondary combustion chamber is that the flue gas combustion is incomplete, by adjusting the rotation speed of the swirl vane, the turbulence degree of the flue gas and air in the chamber is maintained at a certain level, thereby increasing the flue gas combustion process and ensuring full combustion, effectively improving the combustion efficiency of the secondary combustion chamber.

[0054] Furthermore, when it is determined that the reason for the non-compliance of the operation status of the secondary combustion chamber is that the heat exchange efficiency of the secondary combustion chamber does not meet the standard, by adjusting the opening degree of the heat exchange air reversing valve, the heat exchange efficiency of the secondary combustion chamber is ensured, thereby effectively improving the combustion efficiency of the secondary combustion chamber.

[0055] Further, when the present invention determines that the reason for the non - compliance of the operation status of the secondary combustion chamber with the standard lies in the short residence time of the flue gas, by adjusting the residence time of the flue gas in the secondary combustion chamber, the sufficient contact between the flue gas and oxygen is ensured, so that the flue gas burns sufficiently, effectively improving the combustion efficiency of the secondary combustion chamber.

[0056] Further, a water tank is arranged at the bottom of the secondary combustion chamber of the present invention, and large - particle - size dust in the flue gas falls to the bottom to complete primary dust removal, so as to prevent the dusty flue gas from entering the heat exchanger, causing blockage and affecting the heat exchange efficiency, thereby reducing the combustion efficiency of the secondary combustion chamber. Brief Description of the Drawings

[0057] Figure 1 It is a schematic structural diagram of the secondary combustion chamber device for treating pyrolysis flue gas of domestic waste in an embodiment of the present invention;

[0058] Figure 2 It is a flowchart of the determination unit in an embodiment of the present invention for determining whether the operation status of the secondary combustion chamber meets the standard according to the decomposition rate of dioxins;

[0059] Figure 3 It is a flowchart of the adjustment unit in an embodiment of the present invention for determining the adjustment method of the rotational speed of the swirl vane according to the turbulence intensity;

[0060] Figure 4 It is a flowchart of the adjustment unit in an embodiment of the present invention for determining the adjustment method of the residence time of the flue gas according to the difference between the preset standard temperature and the first temperature. Detailed Embodiments

[0061] In order to make the purpose and advantages of the present invention clearer, the present invention will be further described below in conjunction with embodiments; it should be understood that the specific embodiments described herein are only used to explain the present invention and do not limit the present invention.

[0062] The preferred embodiments of the present invention will be described below with reference to the drawings. Those skilled in the art should understand that these embodiments are only used to explain the technical principle of the present invention and do not limit the protection scope of the present invention.

[0063] Terms such as "inside" and "outside" indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings. This is only for convenience of description and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, so it cannot be understood as a limitation of the present invention.

[0064] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and defined, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the communication inside two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0065] Please refer to Figure 1 as shown in the figure, which is a schematic structural diagram of the secondary combustion chamber device for domestic waste pyrolysis flue gas treatment according to an embodiment of the present invention. The secondary combustion chamber device for domestic waste pyrolysis flue gas treatment described in the present invention includes:

[0066] A flue gas inlet 1, which is arranged on one side of the secondary combustion chamber and is used for accessing the flue gas to be treated;

[0067] A flue gas mixing and heat storage chamber 2, which is arranged at the lower part of the secondary combustion chamber and is used for transferring the heat of the high-temperature flue gas to the inside of the heat storage body, the high-thermal conductivity heat storage plate, and releasing it to the combustion-supporting air during the heat exchange process between the flue gas and the air; the flue gas mixing and heat storage chamber 2 includes an air inlet oxygen regulating door 21, an oxygen-increasing air flow guiding valve 22, and a heat exchange air reversing valve 23;

[0068] A combustion chamber 4, which is arranged above the flue gas mixing and heat storage chamber 2 and is used for burning the flue gas to be treated; the combustion chamber 4 includes a gas pressure regulating valve 41 for regulating the pressure, an observation port 42 for observing the situation, and a first temperature sensor 43 for detecting the temperature inside the combustion chamber; the combustion chamber 4 is connected to the flue gas mixing and heat storage chamber 2 through a heat storage area 3;

[0069] A high-temperature combustion chamber 5, which is arranged above the combustion chamber and is used for fully burning the flue gas to be treated; the high-temperature combustion chamber includes a second temperature sensor 51 for detecting the temperature inside the high-temperature combustion chamber and a swirl vane (not shown in the figure) for guiding the flue gas to generate swirl inside the chamber;

[0070] An exhaust gas outlet 6, which is arranged at the top of the secondary combustion chamber and is used for discharging the completely burned gas;

[0071] A detection unit (not shown in the figure), which is respectively connected to the first temperature sensor and the second temperature sensor and is respectively used for detecting the temperatures of the combustion chamber and the high-temperature combustion chamber; the detection unit further includes a mass spectrometer for detecting the dioxin content at the flue gas inlet and the exhaust gas outlet;

[0072] A determination unit (not shown in the figure), which is respectively connected to the corresponding components in the detection unit, is used to determine whether the operating condition of the secondary combustion chamber meets the standard according to the decomposition rate of dioxin in the flue gas, and when it is initially determined that the operating condition of the secondary combustion chamber does not meet the standard, the preset standard decomposition rate is corrected according to the difference between the second preset standard decomposition rate and the decomposition rate, and when it is determined that the operating condition of the secondary combustion chamber does not meet the standard, the reason for the non-compliance of the operating condition of the secondary combustion chamber is determined according to the difference between the decomposition rate and the first preset standard decomposition rate;

[0073] An adjustment unit (not shown in the figure), which is respectively connected to the oxygen-enriched air diversion valve 22, the heat exchange air reversing valve 23, the swirl vane and the determination unit, is used to adjust the valve opening of the oxygen-enriched air diversion valve 22, the valve opening of the heat exchange air reversing valve 23 and the rotation speed of the swirl vane to corresponding values according to the determination result output by the determination unit.

[0074] Specifically, a water tank 7 is further arranged at the bottom of the secondary combustion chamber for collecting dust.

[0075] In the present invention, two to three temperature field spaces are arranged in the space of the secondary combustion chamber, that is, the lower part is a flue gas mixing and heat storage chamber, and successively upwards are a heat storage area, a combustion chamber and a high-temperature combustion chamber. By arranging the heat storage area, the flue gas and air are fully contacted to generate heat exchange, ensuring that there is enough temperature for combustion. At the same time, a low-temperature combustion chamber and a high-temperature combustion chamber are arranged to ensure the full combustion of the flue gas and effectively improve the combustion efficiency of the secondary combustion chamber.

[0076] Please refer to Figure 2 As shown, it is a flowchart of the determination unit of the embodiment of the present invention for determining whether the operating condition of the secondary combustion chamber meets the standard according to the decomposition rate of dioxin. For a single cycle, under the first preset condition, the determination unit obtains the decomposition rate of dioxin according to the contents of dioxin measured at the flue gas inlet 1 and the tail gas outlet 6 by the detection unit. The determination method for the determination unit to determine whether the operating condition of the secondary combustion chamber meets the standard is as follows, where

[0077] The first determination method is that the determination unit determines that the operating condition of the secondary combustion chamber does not meet the standard, and determines the reason for the non-compliance of the operating condition of the secondary combustion chamber according to the difference between the decomposition rate and the first preset standard decomposition rate; the first determination method satisfies that the decomposition rate is less than the first preset standard decomposition rate;

[0078] The second determination method is that the determination unit initially determines that the operating condition of the secondary combustion chamber does not meet the standard, and corrects the preset standard decomposition rate according to the difference between the second preset standard decomposition rate and the decomposition rate; the second determination method satisfies that the decomposition rate is greater than or equal to the first preset standard decomposition rate and less than or equal to the second preset standard decomposition rate, where the first preset standard decomposition rate is less than the second preset standard decomposition rate;

[0079] The third determination method is that the determination unit determines that the operating condition of the secondary combustion chamber meets the standard, and controls the detection unit to detect the content of dioxins at the flue gas inlet and the tail gas outlet in the next cycle; the third determination method satisfies that the decomposition rate is greater than the second preset standard decomposition rate.

[0080] The first preset condition is that the determination unit determines that the flue gas is completely burned out in this cycle.

[0081] The present invention uses a mass spectrometer to detect the content of dioxins at the flue gas inlet and the tail gas outlet respectively, obtains the decomposition rate of dioxins, and judges whether the operating condition of the secondary combustion chamber meets the standard by judging the decomposition of dioxins. The present invention judges whether the combustion is complete by analyzing the degradation of a component in the flue gas, fully ensuring the combustion process, avoiding incomplete combustion and causing secondary pollution to the environment, and further improving the combustion efficiency of the secondary combustion chamber.

[0082] Specifically, in the first determination method, the determination unit determines the reason why the operating condition of the secondary combustion chamber does not meet the standard according to the difference between the decomposition rate and the first preset standard decomposition rate, where

[0083] The first cause determination method is that the determination unit determines that the reason why the operating condition of the secondary combustion chamber does not meet the standard is that the contact between the flue gas and air is insufficient, and makes a secondary determination of the reason for the insufficient contact between the flue gas and air according to the first temperature of the combustion chamber; the first cause determination method satisfies that the difference between the decomposition rate and the first preset standard decomposition rate is less than or equal to the first preset standard low difference set by the determination unit.

[0084] The second cause determination method is that the determination unit determines that the reason why the operating condition of the secondary combustion chamber does not meet the standard is that the flue gas is not fully burned, and determines the adjustment method of the rotational speed of the swirl vane according to the turbulence; the second cause determination method satisfies that the difference between the decomposition rate and the first preset standard decomposition rate is greater than the first preset standard low difference and less than or equal to the second preset standard low difference set by the determination unit, where the first preset standard low difference is less than the second preset standard low difference.

[0085] The third cause determination method is that the determination unit determines that the reason why the operating condition of the secondary combustion chamber does not meet the standard is that the heat exchange efficiency of the secondary combustion chamber does not meet the standard, and adjusts the opening degree of the heat exchange air change-over valve 23 according to the second temperature of the high-temperature combustion chamber; the third cause determination method satisfies that the difference between the decomposition rate and the first preset standard decomposition rate is greater than the second preset standard low difference.

[0086] When it is determined that the operating condition of the secondary combustion chamber does not meet the standard, the reason for the non-compliance of the operating condition of the secondary combustion chamber is determined according to the difference between the decomposition rate and the first preset standard decomposition rate. Through the analysis of the reason, corresponding adjustments are made to the corresponding components to avoid insufficient adjustment, resulting in the discharged gas not meeting the requirements and causing secondary pollution.

[0087] A water tank is arranged at the bottom of the secondary combustion chamber of the present invention. Large-particle dust in the flue gas falls to the bottom to complete primary dust removal, so as to prevent the dusty flue gas from entering the heat exchanger, causing blockage and affecting the heat exchange efficiency, thereby reducing the combustion efficiency of the secondary combustion chamber.

[0088] Specifically, the adjustment unit determines the correction method of the preset standard decomposition rate according to the difference between the second preset standard decomposition rate and the decomposition rate in the second determination method, where

[0089] The first correction method is that the adjustment unit uses a first correction coefficient to correct the preset standard decomposition rate to a corresponding value; the first correction method satisfies that the difference between the second preset standard decomposition rate and the decomposition rate is less than or equal to the first preset standard excessive difference set by the adjustment unit;

[0090] The second correction method is that the adjustment unit uses a second correction coefficient to correct the preset standard decomposition rate to a corresponding value; the second correction method satisfies that the difference between the second preset standard decomposition rate and the decomposition rate is greater than the first preset standard excessive difference and less than or equal to the second preset standard excessive difference set by the adjustment unit, where the first preset standard excessive difference is less than the second preset standard excessive difference;

[0091] The third correction method is that the adjustment unit uses a third correction coefficient to correct the preset standard decomposition rate to a corresponding value; the third correction method satisfies that the difference between the second preset standard decomposition rate and the decomposition rate is greater than the second preset standard excessive difference.

[0092] Specifically, the determination unit determines the secondary determination method of the reason for the insufficient contact between the flue gas and air according to the first temperature of the combustion chamber in the first cause determination method, where

[0093] The first secondary determination method is that the determination unit determines that the insufficient contact between the flue gas and air is due to the short residence time of the flue gas, and adjusts the residence time of the flue gas to a corresponding value according to the difference between the preset standard temperature and the first temperature; the first secondary determination method satisfies that the first temperature is less than or equal to the preset standard temperature;

[0094] The second determination method is that the determination unit determines that the insufficient contact between the flue gas and air lies in the low oxygen content, and adjusts the opening degree of the oxygen-increasing airflow diversion valve 22 to the corresponding value according to the difference between the first temperature and the preset standard temperature; the second determination method satisfies that the first temperature is greater than the preset standard temperature.

[0095] Please refer to Figure 3 As shown, it is a flowchart of the adjustment method for the adjustment unit to determine the rotation speed of the swirl vane according to the turbulence intensity. The adjustment unit determines the rotation speed of the swirl vane according to the turbulence intensity under the second cause determination method, where

[0096] The first rotation speed adjustment method is that the adjustment unit adjusts the rotation speed of the swirl vane to the corresponding value using the first rotation speed adjustment coefficient; the first rotation speed adjustment method satisfies that the turbulence intensity is less than or equal to the first preset standard turbulence intensity set by the adjustment unit;

[0097] The second rotation speed adjustment method is that the adjustment unit adjusts the rotation speed of the swirl vane to the corresponding value using the second rotation speed adjustment coefficient; the second rotation speed adjustment method satisfies that the turbulence intensity is greater than the first preset standard turbulence intensity and less than or equal to the second preset standard turbulence intensity set by the adjustment unit, where the first preset standard turbulence intensity is less than the second preset standard turbulence intensity;

[0098] The third rotation speed adjustment method is that the adjustment unit adjusts the rotation speed of the swirl vane to the corresponding value using the third rotation speed adjustment coefficient; the third rotation speed adjustment method satisfies that the turbulence intensity is greater than the second preset standard turbulence intensity;

[0099] Among them, the first rotation speed adjustment coefficient is γ1 = 1.07, the second rotation speed adjustment coefficient is γ2 = 1.12, the third rotation speed adjustment coefficient is γ3 = 1.16, the first preset standard turbulence intensity is 6, the second preset standard turbulence intensity is 8, and the adjustment unit records the rotation speed of the swirl vane adjusted by γk as V', V' = V × γk, where V is the initial rotation speed of the swirl vane, and k = 1, 2, 3.

[0100] When the present invention determines that the reason for the non-compliance of the operation status of the secondary combustion chamber with the standard lies in the insufficient combustion of the flue gas, by adjusting the rotation speed of the swirl vane, it ensures that the flue gas and air in the chamber maintain a certain turbulence intensity, thereby increasing the flue gas combustion process, ensuring sufficient combustion, and effectively improving the combustion efficiency of the secondary combustion chamber.

[0101] Specifically, the adjustment unit determines the opening degree of the heat exchange air commutation valve 23 according to the second temperature of the high-temperature combustion chamber under the third cause determination method, where

[0102] The first opening adjustment method is that the adjustment unit adjusts the opening of the heat exchange air reversing valve 23 to the corresponding value using the first opening adjustment coefficient; the first opening adjustment method satisfies that the second temperature is less than or equal to the first preset standard high temperature set by the adjustment unit;

[0103] The second opening adjustment method is that the adjustment unit adjusts the opening of the heat exchange air reversing valve 23 to the corresponding value using the second opening adjustment coefficient; the second opening adjustment method satisfies that the second temperature is greater than the first preset standard high temperature and less than or equal to the second preset standard high temperature set by the adjustment unit, where the first preset standard high temperature is less than the second preset standard high temperature;

[0104] The third opening adjustment method is that the adjustment unit adjusts the opening of the heat exchange air reversing valve 23 to the corresponding value using the third opening adjustment coefficient; the third opening adjustment method satisfies that the second temperature is greater than the second preset standard turbulence;

[0105] Among them, the first opening adjustment coefficient is β1 = 1.10, the second opening adjustment coefficient is β2 = 1.15, the third opening adjustment coefficient is β3 = 1.20, the first preset standard high temperature is 1000, the first preset standard high temperature is 1100, and the adjustment unit records the opening of the heat exchange air reversing valve adjusted using βj as H', H' = H × βj, where H is the initial opening of the heat exchange air reversing valve, and j = 1, 2, 3.

[0106] When the reason for the non - compliance of the operation status of the secondary combustion chamber with the standard in the present invention is that the heat exchange efficiency of the secondary combustion chamber does not meet the standard, by adjusting the opening of the heat exchange air reversing valve, the heat exchange efficiency of the secondary combustion chamber is ensured, thereby effectively improving the combustion efficiency of the secondary combustion chamber.

[0107] Please refer to Figure 4 As shown, it is a flowchart of the adjustment method for the adjustment unit to determine the flue gas residence time according to the difference between the preset standard temperature and the first temperature in the embodiment of the present invention. The adjustment unit determines the adjustment method for the flue gas residence time according to the difference between the preset standard temperature and the first temperature in the first secondary determination method, where

[0108] The first time adjustment method is that the adjustment unit adjusts the residence time of the flue gas to the corresponding value using the first time adjustment coefficient; the first time adjustment method satisfies that the difference between the preset standard temperature and the first temperature is less than or equal to the first preset standard low temperature difference set by the adjustment unit;

[0109] The second time adjustment method is that the adjustment unit adjusts the residence time of the flue gas to the corresponding value by using a second time adjustment coefficient; the second time adjustment method satisfies that the difference between the preset standard temperature and the first temperature is greater than the first preset standard low temperature difference and less than or equal to the second preset standard low temperature difference set by the adjustment unit, where the first preset standard low temperature difference is less than the second preset standard low temperature difference;

[0110] The third time adjustment method is that the adjustment unit adjusts the residence time of the flue gas to the corresponding value by using a third time adjustment coefficient; the third time adjustment method satisfies that the difference between the preset standard temperature and the first temperature is greater than the second preset standard low temperature difference;

[0111] Among them, the first time adjustment coefficient is α1 = 1.05, the second time adjustment coefficient is α2 = 1.12, the third time adjustment coefficient is α3 = 1.20, the first preset standard low temperature difference is 15, the second preset standard low temperature difference is 35, and the adjustment unit records the residence time of the flue gas adjusted by αi as T’, T’ = T × αi, where T is the initial residence time of the flue gas and i = 1, 2, 3.

[0112] In the present invention, when it is determined that the reason for the non - compliance of the operation status of the secondary combustion chamber is the short residence time of the flue gas, by adjusting the residence time of the flue gas in the secondary combustion chamber, the sufficient contact between the flue gas and oxygen is ensured, so that the flue gas burns sufficiently, effectively improving the combustion efficiency of the secondary combustion chamber.

[0113] Specifically, under the second secondary determination method, the adjustment unit determines the adjustment method of the opening degree of the oxygen - increasing air flow diversion valve 22 according to the difference between the first temperature and the preset standard temperature, where

[0114] The first valve opening adjustment method is that the adjustment unit adjusts the opening degree of the oxygen - increasing air flow diversion valve 22 to the corresponding value by using a first valve opening adjustment coefficient; the first valve opening adjustment method satisfies that the difference between the first temperature and the preset standard temperature is less than or equal to the first preset standard high temperature difference set by the adjustment unit;

[0115] The second valve opening adjustment method is that the adjustment unit adjusts the opening degree of the oxygen - increasing air flow diversion valve 22 to the corresponding value by using a second valve opening adjustment coefficient; the second valve opening adjustment method satisfies that the difference between the first temperature and the preset standard temperature is greater than the first preset standard high temperature difference and less than or equal to the second preset standard high temperature difference set by the adjustment unit, where the first preset standard high temperature difference is less than the second preset standard high temperature difference;

[0116] The third valve opening adjustment method is that the adjustment unit adjusts the opening of the oxygen-increasing air flow diversion valve 22 to the corresponding value by using the third valve opening adjustment coefficient; the third valve opening adjustment method satisfies that the difference between the first temperature and the preset standard temperature is greater than the second preset standard over-high temperature difference;

[0117] Among them, the first valve opening adjustment coefficient is δ1 = 1.03, the second valve opening adjustment coefficient is δ2 = 1.13, the third valve opening adjustment coefficient is δ3 = 1.21, the first preset standard over-high temperature difference is 42, the second preset standard over-high temperature difference is 63, and the adjustment unit records the opening of the oxygen-increasing air flow diversion valve adjusted by δm as G', G' = G × δm, where G is the initial opening of the oxygen-increasing air flow diversion valve, and m = 1, 2, 3.

[0118] It should be noted that the data in the above specific implementation manners are all obtained through comprehensive analysis and evaluation of the historical detection data and the corresponding historical detection results in the three months before this detection by the secondary combustion chamber equipment for treating the pyrolysis flue gas of domestic waste according to the present invention. The secondary combustion chamber equipment for treating the pyrolysis flue gas of domestic waste according to the present invention satisfies the relationship in 64,368 cumulative detection tests in the three months before this detection. Those skilled in the art can understand that the determination method for a single above parameter by the secondary combustion chamber equipment for treating the pyrolysis flue gas of domestic waste according to the present invention can be to select the value with the highest data distribution ratio as the selection method, as long as the values that can be obtained by the method according to the present invention can clearly define different specific situations in the single determination process.

[0119] So far, the technical solution of the present invention has been described in combination with the preferred embodiments shown in the drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific implementation manners. Without departing from the principle 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 these changes or substitutions will all fall within the protection scope of the present invention.

[0120] The above are only the preferred embodiments of the present invention and are not used to limit the present invention; for those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent substitution, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A secondary combustion chamber device for treating pyrolysis flue gas of domestic waste, characterized in that, Comprising: A flue gas inlet, which is arranged on one side of the secondary combustion chamber for admitting the flue gas to be treated; A flue gas mixing and heat storage chamber, which is arranged at the lower part of the secondary combustion chamber for transferring the heat of the high-temperature flue gas to the inside of the heat storage body, the high-thermal-conductivity heat storage plate and releasing it to the combustion-supporting air during the heat exchange process between the flue gas and the air; the flue gas mixing and heat storage chamber includes an air inlet oxygen regulating valve, an oxygen-increasing air flow guiding valve and a heat exchange air reversing valve; A combustion chamber, which is arranged above the flue gas mixing and heat storage chamber for burning the flue gas to be treated; the combustion chamber includes a gas pressure regulating valve for regulating the pressure, an observation port for observing the situation and a first temperature sensor for detecting the temperature inside the combustion chamber; the combustion chamber is connected to the flue gas mixing and heat storage chamber through a heat storage area; A high-temperature combustion chamber, which is arranged above the combustion chamber for fully burning the flue gas to be treated; the high-temperature combustion chamber includes a second temperature sensor for detecting the temperature inside the high-temperature combustion chamber and a swirl vane for guiding the flue gas to generate swirl inside the chamber; An exhaust gas outlet, which is arranged at the top of the secondary combustion chamber for discharging the completely burned gas; A detection unit, which is respectively connected to the first temperature sensor and the second temperature sensor for detecting the temperatures of the combustion chamber and the high-temperature combustion chamber respectively; the detection unit also includes a mass spectrometer for detecting the dioxin content at the flue gas inlet and the exhaust gas outlet; A determination unit, which is respectively connected to the corresponding components in the detection unit for determining whether the operation status of the secondary combustion chamber meets the standard according to the decomposition rate of dioxin in the flue gas, and when initially determining that the operation status of the secondary combustion chamber does not meet the standard, correcting the preset standard decomposition rate according to the difference between the second preset standard decomposition rate and the decomposition rate, and when determining that the operation status of the secondary combustion chamber does not meet the standard, determining the reason why the operation status of the secondary combustion chamber does not meet the standard according to the difference between the decomposition rate and the first preset standard decomposition rate; An adjustment unit, which is respectively connected to the oxygen-increasing air flow guiding valve, the heat exchange air reversing valve, the swirl vane and the determination unit for adjusting the valve opening of the oxygen-increasing air flow guiding valve, the valve opening of the heat exchange air reversing valve and the rotation speed of the swirl vane to corresponding values according to the determination result output by the determination unit.

2. The secondary combustion chamber device for treating pyrolysis flue gas of domestic waste according to claim 1, wherein For a single cycle, the determination unit obtains the decomposition rate of dioxin according to the dioxin content measured by the detection unit at the flue gas inlet and the exhaust gas outlet under the first preset condition, and the determination method for the determination unit to determine whether the operation status of the secondary combustion chamber meets the standard according to the decomposition rate of dioxin, wherein, The first determination method is that the determination unit determines that the operation status of the secondary combustion chamber does not meet the standard and determines the reason why the operation status of the secondary combustion chamber does not meet the standard according to the difference between the decomposition rate and the first preset standard decomposition rate; the first determination method satisfies that the decomposition rate is less than the first preset standard decomposition rate; The second determination method is that the determination unit preliminarily determines that the operating condition of the secondary combustion chamber does not meet the standard, and corrects the preset standard decomposition rate according to the difference between the second preset standard decomposition rate and the decomposition rate; the second determination method satisfies that the decomposition rate is greater than or equal to the first preset standard decomposition rate and less than or equal to the second preset standard decomposition rate, where the first preset standard decomposition rate is less than the second preset standard decomposition rate; The third determination method is that the determination unit determines that the operating condition of the secondary combustion chamber meets the standard, and controls the detection unit to detect the content of dioxins at the flue gas inlet and the tail gas outlet in the next cycle; the third determination method satisfies that the decomposition rate is greater than the second preset standard decomposition rate; The first preset condition is that the determination unit determines that the flue gas is completely burned in this cycle.

3. The secondary combustion chamber device for treating pyrolysis flue gas of domestic waste according to claim 2, characterized in that, Under the first determination method, the determination unit determines the reason why the operating condition of the secondary combustion chamber does not meet the standard according to the difference between the decomposition rate and the first preset standard decomposition rate, where, The first cause determination method is that the determination unit determines that the reason why the operating condition of the secondary combustion chamber does not meet the standard is that the contact between the flue gas and air is insufficient, and makes a secondary determination of the reason for the insufficient contact between the flue gas and air according to the first temperature of the combustion chamber; the first cause determination method satisfies that the difference between the decomposition rate and the first preset standard decomposition rate is less than or equal to the first preset standard low difference set by the determination unit; The second cause determination method is that the determination unit determines that the reason why the operating condition of the secondary combustion chamber does not meet the standard is that the flue gas is not fully burned, and determines the adjustment method of the swirler blade rotation speed according to the turbulence; the second cause determination method satisfies that the difference between the decomposition rate and the first preset standard decomposition rate is greater than the first preset standard low difference and less than or equal to the second preset standard low difference set by the determination unit, where the first preset standard low difference is less than the second preset standard low difference; The third cause determination method is that the determination unit determines that the reason why the operating condition of the secondary combustion chamber does not meet the standard is that the heat exchange efficiency of the secondary combustion chamber does not meet the standard, and adjusts the opening of the heat exchange air changeover valve according to the second temperature of the high-temperature combustion chamber; the third cause determination method satisfies that the difference between the decomposition rate and the first preset standard decomposition rate is greater than the second preset standard low difference.

4. The secondary combustion chamber device for treating pyrolysis flue gas of domestic waste according to claim 3, characterized in that, Under the second determination method, the adjustment unit determines the correction method of the preset standard decomposition rate according to the difference between the second preset standard decomposition rate and the decomposition rate, where, The first correction method is that the adjustment unit corrects the preset standard decomposition rate to the corresponding value using the first correction coefficient; the first correction method satisfies that the difference between the second preset standard decomposition rate and the decomposition rate is less than or equal to the first preset standard high difference set by the adjustment unit; The second correction method is that the adjustment unit corrects the preset standard decomposition rate to the corresponding value using the second correction coefficient; the second correction method satisfies that the difference between the second preset standard decomposition rate and the decomposition rate is greater than the first preset standard high difference and less than or equal to the second preset standard high difference set by the adjustment unit, where the first preset standard high difference is less than the second preset standard high difference; The third correction method is that the adjustment unit uses a third correction coefficient to correct the preset standard decomposition rate to a corresponding value; the third correction method satisfies that the difference between the second preset standard decomposition rate and the decomposition rate is greater than the second preset excessive difference.

5. The secondary combustion chamber device for treating pyrolysis flue gas of domestic waste according to claim 4, characterized in that, The determination unit has a secondary determination method for determining the reason for insufficient contact between flue gas and air according to the first temperature of the combustion chamber in the first reason determination method, where The first secondary determination method is that the determination unit determines that the insufficient contact between flue gas and air is due to the short residence time of the flue gas, and adjusts the residence time of the flue gas to a corresponding value according to the difference between the preset standard temperature and the first temperature; the first secondary determination method satisfies that the first temperature is less than or equal to the preset standard temperature; The second secondary determination method is that the determination unit determines that the insufficient contact between flue gas and air is due to the low oxygen content, and adjusts the opening degree of the oxygen-increasing air diversion valve to a corresponding value according to the difference between the first temperature and the preset standard temperature; the second secondary determination method satisfies that the first temperature is greater than the preset standard temperature.

6. The secondary combustion chamber device for treating pyrolysis flue gas of domestic waste according to claim 5, characterized in that, The adjustment unit has an adjustment method for determining the rotation speed of the swirl vane according to the turbulence intensity in the second reason determination method, where The first rotation speed adjustment method is that the adjustment unit uses a first rotation speed adjustment coefficient to adjust the rotation speed of the swirl vane to a corresponding value; the first rotation speed adjustment method satisfies that the turbulence intensity is less than or equal to the first preset standard turbulence intensity set by the adjustment unit; The second rotation speed adjustment method is that the adjustment unit uses a second rotation speed adjustment coefficient to adjust the rotation speed of the swirl vane to a corresponding value; the second rotation speed adjustment method satisfies that the turbulence intensity is greater than the first preset standard turbulence intensity and less than or equal to the second preset standard turbulence intensity set by the adjustment unit, where the first preset standard turbulence intensity is less than the second preset standard turbulence intensity; The third rotation speed adjustment method is that the adjustment unit uses a third rotation speed adjustment coefficient to adjust the rotation speed of the swirl vane to a corresponding value; the third rotation speed adjustment method satisfies that the turbulence intensity is greater than the second preset standard turbulence intensity.

7. The secondary combustion chamber device for treating pyrolysis flue gas of domestic waste according to claim 6, characterized in that, The adjustment unit determines the opening degree of the heat exchange air reversing valve according to the second temperature of the high-temperature combustion chamber in the third reason determination method, where The first opening degree adjustment method is that the adjustment unit uses a first opening degree adjustment coefficient to adjust the opening degree of the heat exchange air reversing valve to a corresponding value; the first opening degree adjustment method satisfies that the second temperature is less than or equal to the first preset standard excessive temperature set by the adjustment unit; The second opening degree adjustment method is that the adjustment unit uses a second opening degree adjustment coefficient to adjust the opening degree of the heat exchange air reversing valve to a corresponding value; the second opening degree adjustment method satisfies that the second temperature is greater than the first preset standard excessive temperature and less than or equal to the second preset standard excessive temperature set by the adjustment unit, where the first preset standard excessive temperature is less than the second preset standard excessive temperature; The third opening degree adjustment method is that the adjustment unit uses a third opening degree adjustment coefficient to adjust the opening degree of the heat exchange air reversing valve to a corresponding value; the third opening degree adjustment method satisfies that the second temperature is greater than the second preset standard turbulence intensity.

8. The secondary combustion chamber device for treating pyrolysis flue gas of domestic waste according to claim 7, characterized in that, The adjustment unit determines the adjustment method of the residence time of the flue gas according to the difference between the preset standard temperature and the first temperature in the first secondary determination method, where The first time adjustment method is that the adjustment unit uses the first time adjustment coefficient to adjust the residence time of the flue gas to the corresponding value; the first time adjustment method satisfies that the difference between the preset standard temperature and the first temperature is less than or equal to the first preset standard low temperature difference set by the adjustment unit; The second time adjustment method is that the adjustment unit uses the second time adjustment coefficient to adjust the residence time of the flue gas to the corresponding value; the second time adjustment method satisfies that the difference between the preset standard temperature and the first temperature is greater than the first preset standard low temperature difference and less than or equal to the second preset standard low temperature difference set by the adjustment unit, where the first preset standard low temperature difference is less than the second preset standard low temperature difference; The third time adjustment method is that the adjustment unit uses the third time adjustment coefficient to adjust the residence time of the flue gas to the corresponding value; the third time adjustment method satisfies that the difference between the preset standard temperature and the first temperature is greater than the second preset standard low temperature difference.

9. The secondary combustion chamber device for treating pyrolysis flue gas of domestic waste according to claim 8, characterized in that, The adjustment unit determines the adjustment method of the opening degree of the oxygen-enriched air flow diversion valve according to the difference between the first temperature and the preset standard temperature in the second secondary determination method, where The first valve opening degree adjustment method is that the adjustment unit uses the first valve opening degree adjustment coefficient to adjust the opening degree of the oxygen-enriched air flow diversion valve to the corresponding value; the first valve opening degree adjustment method satisfies that the difference between the first temperature and the preset standard temperature is less than or equal to the first preset standard high temperature difference set by the adjustment unit; The second valve opening degree adjustment method is that the adjustment unit uses the second valve opening degree adjustment coefficient to adjust the opening degree of the oxygen-enriched air flow diversion valve to the corresponding value; the second valve opening degree adjustment method satisfies that the difference between the first temperature and the preset standard temperature is greater than the first preset standard high temperature difference and less than or equal to the second preset standard high temperature difference set by the adjustment unit, where the first preset standard high temperature difference is less than the second preset standard high temperature difference; The third valve opening degree adjustment method is that the adjustment unit uses the third valve opening degree adjustment coefficient to adjust the opening degree of the oxygen-enriched air flow diversion valve to the corresponding value; the third valve opening degree adjustment method satisfies that the difference between the first temperature and the preset standard temperature is greater than the second preset standard high temperature difference.

10. The secondary combustion chamber device for treating pyrolysis flue gas of domestic waste according to claim 9, characterized in that, A water tank is also arranged at the bottom of the secondary combustion chamber to collect dust.

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