Secondary combustion chamber and incineration system

Abstract

The utility model belongs to the technical field of hazardous waste treatment equipment, and discloses a secondary combustion chamber and an incineration system. The secondary combustion chamber comprises a barrel and a spray combustion furnace. A treatment cavity is formed in the barrel, a flue gas inlet and a flue gas outlet are formed in the barrel, flue gas output by the first combustion chamber is supplied into the treatment cavity through the flue gas inlet, and flue gas treated by the second combustion chamber is discharged out of the treatment cavity through the flue gas outlet. The spraying combustion furnace is arranged at the flue gas inlet, the spraying combustion furnace is configured to mix air and flue gas supplied by the flue gas inlet and ignite the mixture, and the spraying combustion furnace is further configured to spray combustion flue gas into the treatment cavity in the preset direction so as to prolong the movement path of the flue gas in the treatment cavity. The smoke inlet and the smoke outlet are arranged in the first direction, and the preset direction intersects with the first direction. According to the utility model, air and flue gas are directly mixed and ignited at the flue gas inlet through the spray combustion furnace, so that the air and the flue gas can be fully contacted from the source, thereby reducing harmful substances generated by incomplete combustion and improving the harmless degree of hazardous waste treatment.

Description

Technical Field

[0001] This utility model relates to the technical field of hazardous waste treatment equipment, and in particular to a two-combustion chamber and incineration system. Background Technology

[0002] In the field of hazardous waste treatment, incineration decomposes and transforms harmful substances in waste through high temperature, achieving volume reduction and harmless treatment. The secondary combustion chamber, as the core component of the hazardous waste incineration system, is responsible for the secondary combustion of the high-temperature flue gas discharged from the primary combustion chamber. Its performance is directly related to the treatment effect of hazardous waste incineration and the compliance of environmental protection indicators.

[0003] Specifically, the high-temperature flue gas generated in the primary combustion chamber enters the secondary combustion chamber under the action of an induced draft fan, where unburned combustible gases continue to burn. However, the existing structural design and operating mode of the secondary combustion chamber have flaws, making it difficult to ensure that the combustible components in the flue gas are fully mixed with oxygen, resulting in incomplete combustion and the inability to completely decompose a large number of harmful substances. In addition, the temperature control and heat retention of the secondary combustion chamber are ineffective, which not only affects the decomposition efficiency of harmful components but also increases energy consumption and operating costs, making it difficult to meet current stringent environmental emission requirements and energy conservation demands.

[0004] Therefore, the above problems urgently need to be solved. Utility Model Content

[0005] The purpose of this invention is to provide a secondary combustion chamber and incineration system to reduce harmful substances generated by incomplete combustion and improve the harmlessness of hazardous waste treatment.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] A secondary combustion chamber includes a cylinder and a combustion furnace, wherein:

[0008] The cylinder has a processing chamber inside, and the cylinder is provided with a flue gas inlet and a flue gas outlet. The flue gas output from the first combustion chamber is supplied into the processing chamber through the flue gas inlet, and the flue gas processed by the second combustion chamber is discharged from the processing chamber through the flue gas outlet.

[0009] The combustion furnace is located at the flue gas inlet. The combustion furnace is configured to mix and ignite air with the flue gas supplied by the flue gas inlet. The combustion furnace is also configured to inject the burning flue gas into the processing chamber in a preset direction to prolong the movement path of the flue gas in the processing chamber.

[0010] The flue gas inlet and the flue gas outlet are arranged along a first direction, and the preset direction intersects with the first direction.

[0011] Preferably, the flue gas outlet is located at the upper part of the cylinder, and the flue gas inlet is located at the lower part of the cylinder.

[0012] Preferably, the cylinder is cylindrical, and the flue gas inlet and the flue gas outlet are located at different radial positions around the cylinder.

[0013] Preferably, the combustion furnace includes a burner body, a fuel supply pipeline, and an air supply pipeline, wherein;

[0014] The burner body is disposed at the flue gas inlet, and the burner body includes a mixing chamber communicating with the flue gas inlet so that the flue gas is input into the processing chamber through the mixing chamber;

[0015] The fuel supply line is connected to the mixing chamber to input fuel into the mixing chamber;

[0016] The air supply line is connected to the mixing chamber to input air into the mixing chamber and to drive the air, flue gas and fuel to mix in the mixing chamber.

[0017] Preferably, the inner wall of the cylinder is covered with a heat insulation layer.

[0018] Preferably, the cylinder is made of carbon steel, and the insulation layer includes aluminum silicate fiber cotton, insulation castable and corundum castable, which are sequentially applied to the inner wall of the cylinder from the inside to the outside.

[0019] Preferably, the secondary combustion chamber further includes an exhaust chimney disposed at the top of the cylinder, the exhaust chimney being configured to release internal high-pressure gas.

[0020] Preferably, the secondary combustion chamber further includes:

[0021] A pressure detection element is disposed on the cylinder, and the pressure detection element is used to detect the pressure inside the processing chamber;

[0022] A temperature detection element is disposed on the cylinder body, and the temperature detection element is used to detect the temperature inside the processing chamber.

[0023] Preferably, the secondary combustion chamber further includes an inspection door disposed on the cylinder.

[0024] An incineration system includes a primary combustion chamber, a delivery pipeline, and the aforementioned secondary combustion chamber, wherein:

[0025] The first combustion chamber is used to incinerate waste. The flue gas output from the first combustion chamber is fed into the second combustion chamber through the conveying pipeline so that the second combustion chamber can continue to burn unburned combustible gas.

[0026] The beneficial effects of this utility model are:

[0027] This invention uses a combustion furnace to directly mix and ignite air and flue gas at the flue gas inlet, allowing the two to come into full contact from the source. Compared with existing two-chamber combustion, this method greatly improves the mixing efficiency. In other words, a sufficient oxygen supply and a good mixing state can ensure that combustible components can burn more completely, thereby reducing harmful substances produced by incomplete combustion and improving the harmlessness of hazardous waste treatment.

[0028] Furthermore, the combustion furnace injects the flue gas into the treatment chamber in a preset direction that intersects with the flue gas inlet and outlet directions. Because of the angular difference between the preset direction and the original flow direction of the flue gas, the flue gas cannot exit directly from the outlet in a straight line within the treatment chamber. Instead, it needs to move along a more complex path, thus extending its movement within the treatment chamber and increasing the time it remains in the high-temperature environment. Specifically, within the same space, the flue gas has more time to exchange heat with the inner wall of the cylinder and other high-temperature areas, reducing heat loss and better maintaining the high-temperature environment within the treatment chamber. This stable high-temperature environment not only helps to decompose harmful substances more thoroughly but also avoids the additional energy consumption required to maintain the temperature due to temperature fluctuations, thereby effectively reducing energy consumption and operating costs and meeting environmental emission requirements and energy-saving needs. Attached Figure Description

[0029] Figure 1 This is a top view of the secondary combustion chamber provided by this utility model;

[0030] Figure 2 yes Figure 1 Sectional view along BB;

[0031] Figure 3 This is a schematic diagram of the combustion furnace provided by this utility model;

[0032] Figure 4 This is a schematic diagram of the structure of the insulation layer provided by this utility model.

[0033] In the picture:

[0034] 1. Cylindrical shell; 11. Flue gas inlet; 12. Flue gas outlet;

[0035] 2. Combustion furnace; 21. Burner body; 22. Fuel supply pipeline; 23. Air supply pipeline;

[0036] 3. Thermal insulation layer; 31. Alumina silicate fiber cotton; 32. Thermal insulation castable; 33. Corundum castable;

[0037] 4. Pressure detection device; 5. Temperature detection device; 6. Inspection door. Detailed Implementation

[0038] Before explaining any implementation of this application in detail, it should be understood that this application is not limited to its application to the structural details and component arrangements set forth in the following description or shown in the above drawings.

[0039] In this application, the terms "comprising," "including," "having," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0040] In this application, the term "and / or" refers to a relationship between related objects in a two-combustion chamber, indicating that three relationships can exist. For example, a two-combustion chamber centrifugal vortex magnetic pump and / or a centrifugal vortex magnetic pump can represent: the existence of only one two-combustion chamber centrifugal vortex magnetic pump, the simultaneous existence of both a two-combustion chamber centrifugal vortex magnetic pump and a centrifugal vortex magnetic pump, or the existence of only one centrifugal vortex magnetic pump. Additionally, the character " / " in this application generally indicates that the preceding and following related objects have an "and / or" relationship within a two-combustion chamber.

[0041] In this application, the terms "connection," "combination," "coupling," and "installation" can refer to direct connection, combination, coupling, or installation, or indirect connection, combination, coupling, or installation. For example, a direct connection refers to two parts or components being connected together without the need for an intermediary, while an indirect connection refers to two parts or components each being connected to at least one intermediary, with the connection achieved through the intermediary. Furthermore, "connection" and "coupling" are not limited to physical or mechanical connections or couplings, but can also include electrical connections or couplings.

[0042] In this application, those skilled in the art will understand that relative terms (e.g., “about,” “approximately,” “basically,” etc.) used in conjunction with quantities or conditions are to include the values ​​and have the meaning indicated by the context. For example, such relative terms include at least the degree of error associated with the measurement of a particular value, tolerances associated with the particular value due to manufacturing, assembly, use, etc. Such terms should also be considered as disclosing a range defined by the absolute values ​​of the two endpoints. Relative terms may refer to a certain percentage (e.g., 1%, 5%, 10% or more) of the indicated value. Numerical values ​​not using relative terms should also be disclosed as specific values ​​with tolerances. Furthermore, “basically” when expressing relative angular relationships (e.g., substantially parallel, substantially perpendicular) may refer to a certain degree (e.g., 1 degree, 5 degrees, 10 degrees or more) added to or subtracted from the indicated angle.

[0043] In this application, those skilled in the art will understand that the function performed by a component can be performed by one component, multiple components, one part, or multiple parts. Similarly, the function performed by a part can also be performed by one part, one component, or a combination of multiple parts.

[0044] In this application, the directional terms "upper," "lower," "left," "right," "front," and "rear" are used to describe the orientation and positional relationships shown in the accompanying drawings and should not be construed as limiting the embodiments of this application. Furthermore, in the context, it should be understood that when an element is mentioned as being connected "upper" or "lower" to another element, it can be directly connected to the other element "upper" or "lower," or indirectly connected through an intermediate element. It should also be understood that directional terms such as upper side, lower side, left side, right side, front side, and rear side not only represent positive orientation but can also be understood as lateral orientation. For example, "below" can include directly below, lower left, lower right, lower front, and lower rear.

[0045] Please see Figures 1 to 4 This embodiment provides a two-combustion chamber, which includes a cylindrical body 1 and a combustion furnace 2. A processing chamber is formed inside the cylindrical body 1. A flue gas inlet 11 and a flue gas outlet 12 are provided on the cylindrical body 1. Flue gas from the first combustion chamber is supplied into the processing chamber through the flue gas inlet 11, and the flue gas processed by the second combustion chamber is discharged from the processing chamber through the flue gas outlet 12. The combustion furnace 2 is disposed at the flue gas inlet 11. The combustion furnace 2 is configured to mix and ignite air with the flue gas supplied by the flue gas inlet 11. The combustion furnace 2 is also configured to inject the burning flue gas into the processing chamber along a preset direction to prolong the movement path of the flue gas within the processing chamber. The flue gas inlet 11 and the flue gas outlet 12 are arranged along a first direction, and the preset direction intersects with the first direction.

[0046] With this configuration, the flue gas generated in the combustion chamber enters the processing chamber of the cylinder 1 through the flue gas inlet 11. The combustion furnace 2 located at the flue gas inlet 11 fully mixes the air with the incoming flue gas and ignites the mixture, allowing the unburned combustible gas to continue burning.

[0047] Understandably, the combustion furnace 2 mixes and ignites air and flue gas directly at the flue gas inlet 11, allowing the two to come into full contact from the source. Compared with the existing secondary combustion chamber, this method greatly improves the mixing efficiency. In other words, a sufficient supply of oxygen and a good mixing state can ensure that the combustible components can burn more completely, thereby reducing the harmful substances produced by incomplete combustion and improving the harmlessness of hazardous waste treatment.

[0048] More importantly, the combustion furnace 2 injects the combusting flue gas into the processing chamber in a preset direction that intersects with the arrangement of the flue gas inlet 11 and the flue gas outlet 12. Because the preset direction differs in angle from the original flow direction of the flue gas, the flue gas cannot be discharged directly from the flue gas outlet 12 in a straight line within the processing chamber. Instead, it needs to move along a more complex path, thus extending its movement path within the processing chamber and increasing the time the flue gas remains in the high-temperature environment. Specifically, within the same space, the flue gas has more time to exchange heat with the inner wall of the cylinder 1 and other high-temperature areas, reducing heat loss and better maintaining the high-temperature environment within the processing chamber. This stable high-temperature environment not only helps to decompose harmful substances more thoroughly but also avoids the additional energy consumption required to maintain the temperature due to temperature fluctuations, thereby effectively reducing energy consumption and operating costs and meeting environmental emission requirements and energy-saving needs.

[0049] To further enhance the harmless treatment effect, the flue gas outlet 12 is located at the upper part of the cylinder 1, and the flue gas inlet 11 is located at the lower part of the cylinder 1. With this configuration, after the flue gas enters from the flue gas inlet 11 at the lower part of the cylinder 1, it will form a transverse or oblique swirling motion in the treatment chamber due to the jet direction of the combustion furnace 2. Since the flue gas outlet 12 is located at the upper part, the flue gas is forced to flow a long distance from the lower part to the upper part, thereby forming a vertical or cross airflow angle, resulting in a strong turbulence effect in the flue gas in the treatment chamber.

[0050] Understandably, turbulent motion significantly increases the contact area and mixing frequency between the combustible components in the flue gas and the air supplied by the combustion furnace 2. Compared to the straight-flow pattern of flue gas in existing secondary combustion chambers, this effectively improves the problem of insufficient mixing of combustible components and oxygen. Specifically, the more complete the mixing, the more thorough the combustion reaction, and the less unburned material remains, thereby improving the harmless treatment effect and reducing the emission of harmful substances.

[0051] Furthermore, as the flue gas flows from the bottom to the top, it needs to traverse a longer physical path. At the same time, the injection action of the combustion furnace 2 further extends its actual trajectory within the processing chamber (e.g., the length of the swirling path is much greater than the height of the cylinder 1). In addition, as the flue gas flows upward, gravity and the airflow direction work together to slow down the flue gas discharge velocity, further increasing its residence time in the high-temperature region.

[0052] Specifically, the cylinder 1 is cylindrical, with the flue gas inlet 11 and outlet 12 located at different radial positions along its circumference. The cylindrical shape of the cylinder 1 facilitates the formation of a circumferential swirling flow. When flue gas enters through the inlet 11 in a specific radial direction, the injection direction of the combustion furnace 2 (intersecting the axis of the cylinder 1) forces the airflow to move in a spiral motion along the wall of the cylinder 1. The outlet 12, located on the opposite side of the circumference, further guides the airflow through multiple swirling cycles before discharge. This swirling motion causes the combustible components in the flue gas to undergo radial mixing driven by centrifugal force and axial mixing along the swirling direction, forming a three-dimensional turbulent field. Compared to traditional straight flow or simple crossflow, this mixing mode significantly expands the contact area and drastically shortens the mixing time.

[0053] Specifically, the combustion furnace 2 includes a burner body 21, a fuel supply pipe 22, and an air supply pipe 23. The burner body 21 is located at the flue gas inlet 11 and includes a mixing chamber communicating with the flue gas inlet 11, allowing the flue gas to enter the processing chamber through the mixing chamber. The fuel supply pipe 22 communicates with the mixing chamber to input fuel into the mixing chamber. The air supply pipe 23 communicates with the mixing chamber to input air into the mixing chamber and drive the air, flue gas, and fuel to mix within the mixing chamber. In this embodiment, the outlet of the mixing chamber is designed as a tapered nozzle, which accelerates the airflow by narrowing the cross-section, and guide vanes or guide cones are provided on the inner wall of the nozzle to force the flue gas to be injected in a preset direction, forming a directional swirling flow or a direct-flow flame. Of course, in other embodiments, the burner body 21 can also be fixed at the flue gas inlet 11, with its axis aligned with a preset direction, ensuring that the combustion flame extends along the preset direction.

[0054] When air is supplied into the mixing chamber through air supply pipe 23, the high-speed airflow forms a power source. Through entrainment in fluid mechanics, it drives the flue gas and fuel towards the center of the airflow, forcing turbulent disturbances within the mixing chamber. Compared to the limitations of traditional mixing relying on diffusion, this allows for more uniform mixing of multiphase flow in a short time, providing ideal reactant distribution conditions for subsequent combustion reactions. Furthermore, utilizing the kinetic energy of the air itself to drive mixing avoids the mechanical energy consumption required by additional stirring devices or high-pressure fuel pumps. Air, as the combustion medium, serves as both a source of hybrid power and an oxidant for the combustion reaction, exhibiting a high degree of functional integration.

[0055] It should be noted that the fuel supply pipeline 22 is mainly used for transporting natural gas. It is made of pressure-resistant and corrosion-resistant metal pipe material and is connected to an external natural gas storage or supply system through a series of valves, flow meters, and pressure regulating devices. The valves control the flow of natural gas, the flow meters monitor the flow rate of natural gas in real time, and the pressure regulating devices ensure that the pressure of natural gas entering the mixing chamber is stable, so as to ensure that natural gas can enter the mixing chamber evenly and stably and mix with flue gas and air.

[0056] It should also be noted that the air supply line 23 is responsible for introducing external air into the mixing chamber, and is connected to the blower. The blower uses mechanical power to draw air from the environment into the line and blows it into the mixing chamber at a set flow rate and pressure. The air supply line 23 is also equipped with regulating valves and flow monitoring devices, which can flexibly adjust the air input according to the operating conditions of the secondary combustion chamber to meet the oxygen requirements of different combustion stages, ensuring that air, natural gas, and flue gas are fully mixed in the mixing chamber, providing sufficient air for the efficient and stable combustion process of the secondary combustion chamber. It should be added that the specific structure and working principle of the fuel supply line 22 and the air supply line 23 are well known to those skilled in the art, and will not be described in detail here.

[0057] To further improve combustion efficiency, the inner wall of the cylinder 1 is covered with an insulation layer 3. The insulation layer 3 can significantly reduce heat conduction loss through the wall of the cylinder 1, allowing more heat to be used to maintain the combustion reaction and reducing fuel consumption.

[0058] In this embodiment, the cylinder 1 is made of carbon steel, and the insulation layer 3 includes aluminum silicate fiber cotton 31, insulation castable 32, and corundum castable 33, which are sequentially applied to the inner wall of the cylinder 1 from the inside out. It is understood that the thermal conductivity of the fiber cotton, insulation castable 32, and corundum castable 33 increases sequentially, thus forming a multi-layered thermal resistance structure. From the flue gas side to the external environment, the temperature decreases in a stepwise manner, preventing cracking of a single material due to excessive temperature difference (e.g., through-cracks are easily generated when the temperature difference of a single corundum layer exceeds 600℃). Furthermore, by utilizing the high-efficiency insulation of the aluminum silicate fiber cotton 31, the structural stability of the insulation castable 32, and the wear and corrosion resistance of the corundum castable 33, a comprehensive improvement in the thermodynamic performance, mechanical reliability, and environmental safety of the high-temperature industrial equipment is achieved, making it particularly suitable for the harsh operating conditions of the secondary combustion chamber in hazardous waste incineration.

[0059] Specifically, the secondary combustion chamber also includes an exhaust chimney (not shown in the figure) located at the top of the cylinder 1. The exhaust chimney is configured to release internal high-pressure gas. When the secondary combustion chamber experiences incomplete fuel combustion, sudden flameout and reignition, or blockage of the flue gas treatment system, the internal pressure will surge within seconds. As a pre-designated low-pressure weak point, the exhaust chimney's safety valve or rupture disc will automatically open when the pressure reaches a threshold, releasing overpressure gas and preventing a physical explosion of cylinder 1 due to overpressure. It should be noted that the exhaust chimney includes the chimney body, actuators, and pneumatic control components. It is closed during normal operation. In the event of an accident such as deflagration or overpressure in the secondary combustion chamber, the pressure sensor triggers the pneumatic mechanism, rapidly opening the safety valve or rupture disc, allowing the high-pressure gas to be discharged through the chimney, releasing internal pressure, preventing equipment explosion, and ensuring system safety.

[0060] Preferably, the secondary combustion chamber further includes a pressure detection element 4 and a temperature detection element 5. The pressure detection element 4 is mounted on the cylinder 1 and is used to detect the pressure within the processing chamber. The temperature detection element 5 is mounted on the cylinder 1 and is used to detect the temperature within the processing chamber. It is understood that in practical applications, the fuel-air ratio can be dynamically adjusted based on the pressure and temperature feedback from the pressure detection element 4 and the temperature detection element 5 to ensure maximum combustion efficiency. It should be noted that the pressure detection element 4 can be a pressure transmitter with high-temperature resistance and corrosion resistance (such as a diffused silicon type or capacitive type), and the temperature detection element 5 can be a thermocouple or platinum resistance thermometer, paired with a temperature transmitter; this embodiment will not elaborate further.

[0061] To improve the convenience of maintenance, the secondary combustion chamber also includes an inspection door 6 installed on the cylinder 1. This arrangement allows for periodic opening of the inspection door 6 to visually inspect the structure within the processing chamber or to clean accumulated ash and coke (such as removing molten slag from the bottom of the cylinder 1), maintaining normal equipment operation. It should be noted that the specific model of the inspection door 6 can be selected according to the actual application scenario; this embodiment does not impose specific requirements or limitations in this regard. Key considerations include high-temperature resistance and sealing performance.

[0062] This embodiment also provides an incineration system, which includes a primary combustion chamber, a conveying pipeline, and the aforementioned secondary combustion chamber. The primary combustion chamber is used to incinerate waste, and the flue gas output from the primary combustion chamber is fed into the secondary combustion chamber via the conveying pipeline, so that the secondary combustion chamber can continue to burn unburned combustible gases. It is understood that the incineration system including the aforementioned secondary combustion chamber can ensure that combustible components can be burned more completely, thereby reducing harmful substances generated by incomplete combustion and improving the harmlessness of hazardous waste treatment.

[0063] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A secondary combustion chamber, characterized in that, Includes a cylinder (1) and a combustion furnace (2), wherein: The cylinder (1) has a processing chamber inside. The cylinder (1) is provided with a flue gas inlet (11) and a flue gas outlet (12). The flue gas output from the first combustion chamber is supplied into the processing chamber through the flue gas inlet (11), and the flue gas processed by the second combustion chamber is discharged from the processing chamber through the flue gas outlet (12). The combustion furnace (2) is located at the flue gas inlet (11). The combustion furnace (2) is configured to mix and ignite the air supplied by the flue gas inlet (11). The combustion furnace (2) is also configured to inject the burning flue gas into the processing chamber in a preset direction to extend the movement path of the flue gas in the processing chamber. The flue gas inlet (11) and the flue gas outlet (12) are arranged along a first direction, and the preset direction intersects with the first direction.

2. The secondary combustion chamber according to claim 1, characterized in that, The flue gas outlet (12) is located at the upper part of the cylinder (1), and the flue gas inlet (11) is located at the lower part of the cylinder (1).

3. A secondary combustion chamber according to claim 2, characterized in that, The cylinder (1) is cylindrical, and the flue gas inlet (11) and the flue gas outlet (12) are located at different radial positions around the cylinder (1).

4. A secondary combustion chamber according to claim 1, characterized in that, The combustion furnace (2) includes a burner body (21), a fuel supply pipeline (22), and an air supply pipeline (23), wherein; The burner body (21) is disposed at the flue gas inlet (11), and the burner body (21) includes a mixing chamber communicating with the flue gas inlet (11) so that the flue gas is input into the processing chamber through the mixing chamber; The fuel supply line (22) is connected to the mixing chamber to input fuel into the mixing chamber; The air supply pipe (23) is connected to the mixing chamber to input air into the mixing chamber and to drive the air, flue gas and fuel to mix in the mixing chamber.

5. A secondary combustion chamber according to claim 1, characterized in that, The inner wall of the cylinder (1) is covered with a heat insulation layer (3).

6. A secondary combustion chamber according to claim 5, characterized in that, The cylinder (1) is made of carbon steel, and the insulation layer (3) includes aluminum silicate fiber cotton (31), insulation castable (32) and corundum castable (33) which are sequentially covered on the inner wall of the cylinder (1) from the inside to the outside.

7. A secondary combustion chamber according to claim 1, characterized in that, The secondary combustion chamber also includes an exhaust chimney located at the top of the cylinder (1), the exhaust chimney being configured to release internal high-pressure gas.

8. A secondary combustion chamber according to claim 1, characterized in that, The secondary combustion chamber also includes: A pressure detection element (4) is disposed on the cylinder (1), and the pressure detection element (4) is used to detect the pressure inside the processing chamber; A temperature detection element (5) is disposed on the cylinder (1) and is used to detect the temperature inside the processing chamber.

9. A secondary combustion chamber according to claim 1, characterized in that, The secondary combustion chamber also includes an inspection door (6) installed on the cylinder (1).

10. An incineration system, characterized in that, It includes a primary combustion chamber, a delivery pipeline, and a secondary combustion chamber as described in any one of claims 1-9, wherein: The first combustion chamber is used to incinerate waste. The flue gas output from the first combustion chamber is fed into the second combustion chamber through the conveying pipeline so that the second combustion chamber can continue to burn unburned combustible gas.

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