Domestic waste incinerator

Abstract

A domestic waste incinerator comprises a furnace body, which is composed of an inner shell and an outer shell, the outer shell is a heat-insulating shell, and the inner shell is a heat-conducting steel shell, characterized in that a combustion chamber is arranged between the inner shell and the outer shell, at least one combustion stove is arranged in the combustion chamber, the combustion stove is arranged at the lower part of the inner shell, a feeding port is arranged on the furnace body, a grid is arranged at the bottom of the inner shell, an ignition device is arranged below the grid, an air entrainment system is arranged at the upper part of the inner shell, the air entrainment system is connected to the combustion stove in the combustion chamber, an exhaust port is opened in the combustion chamber, and an ash outlet is arranged at the lower part of the furnace body; the domestic waste incinerator makes full use of the heat energy generated by the domestic waste itself during the incineration to crack and gasify it, and has good thermal efficiency utilization rate.

Description

Technical Field

[0001] The invention relates to a domestic waste incinerator, in particular to a domestic waste incinerator whose furnace body consists of an inner shell and an outer shell. Background Art

[0002] In the process of production and life, people will inevitably produce a large amount of domestic garbage. At present, most of the domestic garbage is treated by centralized incineration, but centralized incineration has the problem of high transportation cost. Therefore, many technical solutions for small and micro garbage incinerators have emerged. For example, Chinese patent CN 117433011 A discloses such a hot air double combustion chamber garbage high temperature cracking gasification furnace, which has the following structural characteristics: an upper combustion chamber is arranged in the upper part of the furnace body, a heat exchanger is installed above the upper combustion chamber, the lower part of the lower cover on the heat exchanger is installed between the heat exchanger shell and the furnace body, and a cavity is left between the inner surface of the lower cover and the outer surface of the furnace body for airflow to pass through, a cavity is left between the lower end of the lower cover and the bottom of the furnace body for airflow to pass through, the shell on the heat exchanger places the lower cover therein, and a cavity is left between the inner surface of the shell and the outer surface of the lower cover for airflow to pass through, forming a U-shaped cavity for airflow to pass through, and a combustion chamber is installed at the bottom of the cracking chamber above the ash collecting chamber. The purpose is to provide a high-temperature pyrolysis gasification furnace for garbage with hot air double combustion chambers with low energy consumption. When in use, the combustion chamber gas is first ignited, and wood chips are put in for combustion. When the ash collecting chamber at the bottom of the furnace body is full of ash, the material is squeezed and pushed into the pyrolysis chamber of the furnace body by the feeding device. At this time, the temperature in the pyrolysis chamber is above degrees, and the combustible gas generated by the pyrolysis of the material rises and enters the upper combustion chamber. At this time, the combustible gas flowing out of the upper combustion chamber is manually ignited through the observation ports on the outer shell and the lower cover, and then the observation ports are closed; the high-temperature gas after combustion is discharged into the atmosphere through the heat exchanger. At this time, the cold air transported by the blower is heated by the heat exchanger, and then runs downward through the cavity between the inner surface of the outer shell and the outer surface of the lower cover, and then runs upward through the cavity between the inner surface of the lower cover and the outer surface of the furnace body, and heats the surface of the furnace body, so that the temperature in the pyrolysis chamber is maintained above 300 degrees. At this time, the fire in the combustion chamber can be turned off, relying only on the combustion of the upper combustion chamber. When the temperature in the pyrolysis chamber is lower than 300 degrees, the combustion chamber gas is ignited to raise its temperature, and this cycle is repeated. This solution uses the hot air generated in the upper combustion chamber to heat the air through heat exchange and then flow back to the outside of the cracking furnace for heating. This method has a large heat loss and requires repeated use of fuel gas for ignition and heating. The use process is relatively complicated and the efficiency is low. For example, Chinese patent CN 203671618U discloses a medical waste pyrolysis treatment device with reusable pyrolysis gas, including a pyrolysis furnace, ancillary equipment, and an induced draft fan. The pyrolysis furnace includes a furnace body, a feeding device, a flue gas channel, a pyrolysis gas pipeline, and an ash discharge device. The pyrolysis furnace also includes a temperature measurement and control system, which mainly includes various temperature sensors, a temperature display instrument, and an automatic controller; the ancillary equipment includes a semi-dry scrubber and a bag dust collector.It discloses a technical solution for igniting pyrolysis gas through a pyrolysis gas combustion nozzle to heat the furnace bottom. In actual applications, due to the complex composition of pyrolysis gas and the unstable combustible gas content, it is extremely difficult to ignite it through the combustion nozzle, and there is a great safety risk in igniting combustible gas in a closed cavity. Therefore, it is urgently needed to develop a domestic waste incinerator. Summary of the invention

[0003] In order to solve the above-mentioned technical problems, the present invention provides a domestic waste incinerator, and the specific technical scheme is as follows: the domestic waste incinerator comprises a furnace body, which is composed of an inner shell and an outer shell, the outer shell is a heat-insulating shell, and the inner shell is a steel heat-conducting shell, characterized in that a combustion chamber is arranged between the inner shell and the outer shell, and at least one combustion stove is arranged in the combustion chamber, and the combustion stove is arranged at the lower part of the inner shell, and a feeding port is arranged on the furnace body, a grid plate is arranged at the bottom of the inner shell, and an ignition device is arranged below the grid plate, and an air entrainment system is arranged at the upper part of the inner shell, and the air entrainment system is connected to the combustion stove in the combustion chamber, and the combustion chamber is provided with an exhaust port, and an ash outlet is arranged at the lower part of the furnace body, and a water vapor separator is arranged outside the furnace body, and the air inlet end of the water vapor separator is connected to the inner shell by the air entrainment system, and the air outlet end of the water vapor separator is connected to the combustion stove by the air entrainment system, and the combustion stove is provided with a gas distribution system. In this way, when the domestic waste incinerator is in operation, domestic waste is added into the inner shell through the feed port and the feed port is closed, and then the ignition device is ignited to ignite the domestic waste. At this time, the domestic waste part in contact with the ignition device is in an incomplete combustion state, and is cracked and gasified into combustible gas. The present invention introduces the combustible gas into the combustion chamber through the air entrainment system arranged on the upper part of the inner shell to ignite the combustion stove. When the combustion stove is ignited, the combustion chamber needs to be connected with the outside world to prevent the ignition of gas in the closed cavity from causing a safety accident. The flame generated by the combustion stove directly burns and heats the inner shell, and then accelerates the cracking and gasification of the domestic waste in the inner shell, thereby increasing the content of combustible gas in the air entrainment system, and then increasing the combustion firepower of the combustion stove. In this way, the cracking and gasification speed of the domestic waste in the inner shell is made faster and faster through the above-mentioned mutually promoting process. During operation, the ignition device can be turned off after the combustion stove burns normally, and it is no longer necessary to ignite the domestic garbage in the inner shell. After high-temperature combustion, harmful substances such as dioxins in the tail gas are basically burned out, and the tail gas generated by the combustion stove is discharged from the exhaust port; the outer shell is a heat-insulating shell, which reduces the heat loss generated by the combustion of the combustion stove, greatly increases the temperature in the combustion chamber, and then increases the temperature in the inner shell. In particular, the inner shell is a steel heat-conducting shell, which can fully conduct the high temperature generated by the combustion stove burning the inner shell to the inner shell, forming a high-temperature cracking and gasification environment, thereby greatly improving the efficiency of the garbage incinerator; in addition, the combustion stove at the bottom of the shell bakes the wet domestic garbage, greatly reducing the water content of the garbage to be burned, and solving the problem that the existing incinerator is difficult to ignite and burns poorly when burning wet domestic garbage.In addition, because domestic waste generally has a high water content, water vapor is generated during the cracking and gasification process. On the one hand, water vapor reduces the combustion efficiency of the burner, and even makes it difficult to burn when the water vapor content is too high. At the same time, water vapor takes away a large amount of heat. Therefore, a water vapor separator is provided between the inner shell and the burner to separate the water vapor mixed in the combustible gas generated by the cracking and gasification of domestic waste in the inner shell, thereby reducing the water content of the combustible gas, improving the combustion quality of the burner, and further increasing the temperature in the combustion chamber. After the burner is provided with a gas distribution system, the gas distribution system can distribute sufficient oxygen required by the burner as needed, thereby further improving the combustion quality of the burner, making it burn fully and reducing the content of harmful gases. It has been verified through practice that when the water content of domestic waste is high, the cracking efficiency of the burner is reduced by relying on its self-combustion in the inner shell. The gasification reaction is very slow, and even requires additional heating by electric heating or additional fire source to achieve cracking and gasification. By setting up a water vapor separator, the water vapor mixed in the combustible gas generated by cracking and gasification is separated, and the combustible gas after water vapor separation is led to the combustion stove in the combustion chamber through the air induction system set on the upper part of the inner shell to ignite the combustible gas. The combustion stove burns more fully and stably, and the flame generated by the combustion stove directly burns and heats the inner shell, so it can be cracked and gasified very quickly without additional heating by electric heating or additional fire source. Through the above mutually promoting process, the cracking and gasification speed of domestic waste in the inner shell is getting faster and faster, which greatly improves the efficiency of domestic waste incineration. According to experimental verification, at present, the water vapor separator can reduce the water vapor content in the combustible gas by about 65% and increase the efficiency of domestic waste incineration by about 160%. ;

[0004] Furthermore, the exhaust port is connected to an exhaust gas cooler, and an exhaust gas purifier is connected after the exhaust gas cooler. In this way, when the exhaust port is connected to the exhaust gas cooler, the high-temperature exhaust gas discharged from the combustion chamber can be cooled, so that the exhaust gas will not affect the regional temperature of the surrounding environment, and when the exhaust gas purifier is connected after the exhaust gas cooler, the exhaust gas cooler can cool the exhaust gas to reduce the impact on the stability of the exhaust gas purifier; and the setting of the exhaust gas purifier can further purify the harmful gases in the exhaust gas and further reduce the emission of harmful gases.

[0005] Furthermore, the inner shell is tiltedly placed in the outer shell, and the combustion stove is placed below the inner shell slope. In this way, the inner shell is tiltedly placed in the outer shell, and the combustion stove is placed below the inner shell slope, which increases the contact area between the domestic garbage in the inner shell and the inner shell, so that it can more fully contact the high-temperature inner shell wall surface, thereby increasing its cracking and gasification speed; the combustion stove is placed below the inner shell slope, which increases the contact area between the inner shell and the combustion flame of the combustion stove, and can improve the heat absorption efficiency of the inner shell, thereby rapidly increasing the chamber temperature in the inner shell.

[0006] Furthermore, the ignition device includes a combustible gas tank and a gas distribution mechanism. In this way, when the ignition device includes a combustible gas tank and a gas distribution mechanism, the ignition device can directly ignite and then ignite the domestic waste in the inner shell, without filling other ignition materials for ignition. Of course, the ignition device can also be covered with flammable materials such as firewood for ignition; in addition, in the initial stage of the cracking and gasification of domestic waste in the inner shell, when the combustible gas generated is not enough to make the combustion stove burn, the combustible gas in the combustible gas tank is introduced into the combustion stove for auxiliary combustion, so that no harmful gas is discharged to the outside.

[0007] Furthermore, a gas-driven fan is provided in the air intake system, and the gas-driven fan drives and supplies air in the direction of the combustion stove. In this way, a gas-driven fan is provided in the air intake system, and when the gas-driven fan drives and supplies air in the direction of the combustion stove, a negative pressure can be formed in the inner shell, thereby promoting the rapid cracking and gasification of domestic waste in the inner shell from the lower layer to the upper layer, which is beneficial to improving the combustion efficiency of the domestic waste incinerator. At the same time, the gas-driven fan can accelerate the air flow velocity in the air intake system and reduce the obstruction effect of the curved part of the pipeline on the air flow; further, the gas-driven fan is an axial flow fan, the air intake system pipeline is a circular pipe, the axial flow fan is arranged in the circular pipe, and an air flow velocity sensor is also provided in the air intake system, and the air flow velocity sensor and the gas-driven fan are linked to control its rotation speed, so that it can stably maintain the air flow velocity in the air intake system.

[0008] Furthermore, at least one fire bridge is provided on the inner shell, one end of the fire bridge is provided in the inner shell, and the other end is provided above the combustion stove; or the fire bridge is a flat steel plate; or the fire bridge is a steel pipe, and the steel pipe passes through the inner shell, with the lower end opening placed above the combustion stove, and the upper end is connected to the outer wall of the inner shell. In this way, a fire bridge is provided on the inner shell, one end of the fire bridge is provided in the inner shell, and the other end is provided above the combustion stove. After the combustion stove is turned on, the fire bridge reaches a high temperature after being burned by the flame, and then the heat is transferred to the domestic waste in the inner shell, prompting it to accelerate cracking and gasification. Because the fire bridge in the inner shell is buried in the domestic waste, the area around the fire bridge is often in an oxygen-deficient state, so that the domestic waste can be better cracked and gasified to produce a large amount of combustible gas, thereby making the combustion of the combustion stove more vigorous, forming a mutually reinforcing virtuous cycle, and further improving the efficiency of the domestic waste incinerator; when the fire bridge is a flat steel plate, in a fire bridge of the same volume, compared with a rod-shaped fire bridge, the flat steel plate and the domestic waste are more closely connected. The contact area between the garbage and the fire bridge is larger, and the ignition efficiency is higher; and the fire bridge is a steel pipe, which passes through the inner shell, with the lower end opening placed above the combustion stove, and the upper end connected to the outer wall of the inner shell. The flame and high-temperature gas generated by the combustion of the combustion stove pass through the inner shell along the fire bridge pipe, so that the temperature of the fire bridge can be rapidly increased, and then the heat is transferred to the domestic garbage in the inner shell, prompting it to accelerate cracking and gasification. Because the fire bridge in the inner shell is buried in the domestic garbage, the area around the fire bridge is often in an oxygen-deficient state, so that the domestic garbage can be better cracked and gasified to produce a large amount of combustible gas, thereby making the combustion of the combustion stove more vigorous, forming a virtuous cycle of mutual promotion, and further improving the efficiency of the domestic waste incinerator.

[0009] Furthermore, the combustion stove is an annular tube with a plurality of combustion holes. Thus, when the combustion stove is an annular tube with a plurality of combustion holes, the combustion stove is placed at the bottom of the inner shell, and when the combustible gas is introduced and ignited, an annular flame is formed at the bottom of the outer shell to burn the inner shell, so that the inner shell is evenly burned, and then the domestic waste in the inner shell is evenly accelerated to be cracked, thereby improving the efficiency of the domestic waste incinerator.

[0010] Furthermore, the grid plate arranged at the bottom of the inner shell is arched upward to form an upper concave space; or at least one ash discharging gear is arranged between the gaps of the grid plates, and the ash discharging gear is driven by a motor. In this way, when the grid plate arranged at the bottom of the inner shell is arched upward to form an upper concave space, the domestic garbage in the inner shell is placed above the upper concave space, and after the ignition device is ignited, the flame in the central area can quickly ignite the domestic garbage on the upper part, and thus quickly decompose and gasify upward and around, which is not easy to cause uneven combustion; and at least one ash discharging gear is arranged between the gaps of the grid plates, and the ash discharging gear is driven by a motor, and the ash in the inner shell can be discharged by starting the motor to drive the gear, which reduces the difficulty of manual ash discharging, and can discharge ash at the same time without affecting normal operation, thereby improving efficiency.

[0011] Furthermore, an exhaust gas driven fan is provided at or behind the exhaust port, and the exhaust gas driven fan blows air in the exhaust direction. In this way, when an exhaust gas driven fan is provided at or behind the exhaust port and the exhaust gas driven fan blows air in the exhaust direction, negative pressure can be formed in the combustion chamber, which accelerates the exhaust gas discharge in the combustion chamber, improves the combustion efficiency of the combustion stove in the combustion chamber, makes the combustion smoother and more complete, and is conducive to improving the working efficiency of the garbage incinerator. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The accompanying drawings, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0013] Figure 1 This is a schematic diagram of the cross-sectional structure of the domestic waste incinerator involved in the present invention;

[0014] Figure 2 Another schematic diagram of the cross-sectional structure of the domestic waste incinerator involved in the present invention;

[0015] Figure 3 Another schematic diagram of the cross-sectional structure of the domestic waste incinerator involved in the present invention;

[0016] Figure 4 Another schematic diagram of the cross-sectional structure of the domestic waste incinerator involved in the present invention;

[0017] Figure 5 Another schematic diagram of the cross-sectional structure of the domestic waste incinerator involved in the present invention;

[0018] Figure 6 Another schematic diagram of the cross-sectional structure of the domestic waste incinerator involved in the present invention;

[0019] Figure 7Another schematic diagram of the cross-sectional structure of the domestic waste incinerator involved in the present invention;

[0020] Figure 8 Another schematic diagram of the cross-sectional structure of the domestic waste incinerator involved in the present invention;

[0021] Fig. 9 Another schematic diagram of the cross-sectional structure of the domestic waste incinerator involved in the present invention;

[0022] Fig.10 Another schematic diagram of the cross-sectional structure of the domestic waste incinerator involved in the present invention;

[0023] Fig.11 It is a schematic diagram of the cross-sectional structure of the ash discharge structure of the domestic waste incinerator involved in the present invention;

[0024] Fig.12 It is a schematic plan view of a combustion stove of a domestic waste incinerator involved in the present invention;

[0025] In each figure: 1-furnace body, 2-inner shell, 3-outer shell, 4-combustion chamber, 5-combustion stove, 6-feeding port, 7-grid plate, 8-ignition device, 9-air entrainment system, 10-exhaust port, 11-ash outlet, 12-water vapor separator, 13-gas distribution system, 14-exhaust cooler, 15-exhaust purifier, 16-combustible gas tank, 17-gas distribution mechanism, 18-gas driven fan, 19-fire bridge, 20-ash outlet gear, 21-exhaust driven fan. In addition, the arrow indicates the direction of airflow, the filler in the filler inner shell 2 means domestic garbage, and each figure is only a schematic diagram of the structure. DETAILED DESCRIPTION

[0026] The present invention is described in detail below in conjunction with the accompanying drawings. The description in this part is only exemplary and explanatory and should not have any limiting effect on the protection scope of the present invention.

[0027] The embodiments of the present invention are as follows: Figure 1 , Figure 2As shown, the domestic waste incinerator comprises a furnace body 1, wherein the furnace body 1 is composed of an inner shell 2 and an outer shell 3, wherein the outer shell 3 is a heat-insulating shell, and the inner shell 2 is a heat-conducting steel shell, wherein a combustion chamber 4 is arranged between the inner shell 2 and the outer shell 3, wherein two combustion stoves 5 are arranged in the combustion chamber 4, wherein the combustion stoves 5 are arranged at the lower part of the inner shell 2, wherein a feed port 6 is arranged on the furnace body 1, wherein a grid plate 7 is arranged at the bottom of the inner shell 2, wherein an ignition device 8 is arranged below the grid plate 7, wherein an air entrainment system 9 is arranged at the upper part of the inner shell 2, wherein the air entrainment system 9 is connected to the combustion stoves 5 in the combustion chamber 4, and wherein an exhaust port 10 is provided in the combustion chamber 4 , an ash outlet 11 is provided at the lower part of the furnace body, wherein the outer shell 3 shown in the figure is composed of a steel plate with a refractory material on the inside, and the inner shell 2 is filled with domestic garbage, and its ignition device 8 is in a burning ignition state, and the combustion stove 5 is in a burning state, and its flame is in a state of burning the inner shell 2. After the domestic garbage at the bottom of the inner shell 2 is ignited and produces enough combustible gas for the combustion stove 5 to continue to burn, the ignition device 8 can be closed; the ash outlet is closed, and the feed port 6 is also the inspection and exit of the inner shell 2. The ignition device 8 shown in the figure is a gas stove, and the ignition device can also be replaced by burning firewood or other combustible materials. Figure 1 As shown, a water vapor separator 12 is arranged outside the furnace body 1, and the air inlet end of the water vapor separator 12 is connected to the inner shell body 2 by the air entrainment system 9, and the air outlet end of the water vapor separator 12 is connected to the combustion stove 5 by the air entrainment system 9. The water vapor separator 12 shown in the figure is an air-cooled water vapor separator. In order to further improve the separation efficiency, a water-cooled water vapor separator is used for water vapor separation; the combustion stove 5 is provided with an air distribution system 13, and the air distribution system 13 is a blower. When the blower is turned on, a large amount of air is blown into the combustion stove 5 to make it burn fully.

[0028] Based on the above embodiment, in another embodiment of the present invention, Figure 3 As shown, the exhaust port 10 is connected to an exhaust gas cooler 14 , and an exhaust gas purifier 15 is connected after the exhaust gas cooler 14 .

[0029] Based on the above embodiment, in another embodiment of the present invention, Figure 6 As shown, the inner shell 2 is tiltedly placed in the outer shell 3, and the combustion stove 5 is placed below the inclined surface of the inner shell 2. As shown in the figure, two combustion stoves 5 are provided and arranged in steps.

[0030] Based on the above embodiment, in another embodiment of the present invention, Figure 4 As shown, the ignition device 8 includes a combustible gas tank 16 and a gas distribution mechanism 17. The fuel in the combustible gas tank can be household liquefied gas or other compressed combustible gas. The gas distribution mechanism 17 is a ventilation duct connected to the outside world, which is used to introduce the air required for the combustible gas to burn; Figure 5 As shown, there is a pipeline to introduce the combustible gas in the combustible gas tank into the combustion stove 5 for auxiliary combustion.

[0031] Based on the above embodiment, in another embodiment of the present invention, Figure 5 , Figure 8 As shown, the air intake system 9 is provided with a gas driven fan 18, and the gas driven fan 18 drives the air to be supplied toward the combustion stove 5, as shown in FIG. Figure 5 , Figure 8 As shown, the gas-driven fan 18 is an axial flow fan, the air intake system 9 pipeline is a circular pipe, and the axial flow fan is arranged in the circular pipe.

[0032] Based on the above embodiment, in another embodiment of the present invention, Figure 3 , Figure 4 , Figure 7 , Fig. 9 As shown, a fire bridge 19 is provided on the inner shell 2, one end of the fire bridge 19 is provided in the inner shell 2, and the other end is provided above the combustion stove 5; Fig. 9 As shown, the fire bridge 19 is a flat steel plate; Figure 3 , Figure 4 , Figure 7 As shown, the fire bridge 19 is a steel pipe, which passes through the inner shell 2, with the lower end opening placed above the combustion stove 5 and the upper end connected to the outer wall of the inner shell 2.

[0033] Based on the above embodiment, in another embodiment of the present invention, Fig.12 As shown, the combustion stove 5 is an annular tube, and a plurality of combustion holes are opened on the annular tube.

[0034] Based on the above embodiment, in another embodiment of the present invention, Fig.10 As shown, the grid plate 7 provided at the bottom of the inner shell 2 is arched upward to form an upper concave space. Fig.11 As shown, a dust removal gear 20 is provided between the gaps of the grid plate 7, and the dust removal gear 20 is driven by a motor.

[0035] Based on the above embodiment, in another embodiment of the present invention, Figure 5 , Fig.10 As shown, an exhaust gas driving fan 21 is disposed behind the exhaust port 10, and the exhaust gas driving fan 21 blows air in the exhaust direction.

Claims

1. A domestic waste incinerator, comprising a furnace body (1), wherein the furnace body (1) is composed of an inner shell (2) and an outer shell (3), wherein the outer shell (3) is a heat-insulating shell, and the inner shell (2) is a heat-conducting shell made of steel, characterized in that A combustion chamber (4) is provided between the inner shell (2) and the outer shell (3), at least one combustion stove (5) is provided in the combustion chamber (4), the combustion stove (5) is provided at the lower part of the inner shell (2), a material inlet (6) is provided on the furnace body (1), a grid plate (7) is provided at the bottom of the inner shell (2), an ignition device (8) is provided below the grid plate (7), an air entrainment system (9) is provided at the upper part of the inner shell (2), the air entrainment system (9) is connected to the combustion stove (5) in the combustion chamber (4), an exhaust port (10) is provided in the combustion chamber (4), an ash outlet (11) is provided at the lower part of the furnace body, a water vapor separator (12) is provided outside the furnace body (1), an air inlet end of the water vapor separator (12) is connected to the inner shell (2) by the air entrainment system (9), and an air outlet end of the water vapor separator (12) is connected to the combustion stove (5) by the air entrainment system (9), and the combustion stove (5) is provided with an air distribution system (13).

2. The domestic waste incinerator according to claim 1, characterized in that The exhaust port (10) is connected to an exhaust gas cooler (14), and an exhaust gas purifier (15) is connected after the exhaust gas cooler (14).

3. The domestic waste incinerator according to claim 1, characterized in that The inner shell (2) is placed obliquely inside the outer shell (3), and the combustion stove (5) is placed below the inclined surface of the inner shell (2).

4. The domestic waste incinerator according to any one of claims 1 to 3, characterized in that The ignition device (8) comprises a combustible gas tank (16) and a gas distribution mechanism (17).

5. The domestic waste incinerator according to any one of claims 1 to 3, characterized in that The air intake system (9) is provided with a gas-driven fan (18), and the gas-driven fan (18) drives air to be supplied in the direction of the combustion stove (5).

6. The domestic waste incinerator according to any one of claims 1 to 3, characterized in that At least one fire bridge (19) is arranged on the inner shell (2), one end of the fire bridge (19) is arranged inside the inner shell (2), and the other end is arranged above the combustion stove (5); or the fire bridge (19) is a flat steel plate; or the fire bridge (19) is a steel pipe, which passes through the inner shell (2), has an opening at the lower end arranged above the combustion stove (5), and an upper end connected to the outer wall of the inner shell.

7. The domestic waste incinerator according to any one of claims 1 to 3, characterized in that The combustion stove (5) is an annular tube, and a plurality of combustion holes are provided on the annular tube.

8. The domestic waste incinerator according to any one of claims 1 to 3, characterized in that The grid plate (7) arranged at the bottom of the inner shell (2) is arched upwards to form an upper concave space; or at least one ash discharge gear (20) is arranged between the gaps of the grid plate (7), and the ash discharge gear (20) is driven by a motor.

9. The domestic waste incinerator according to any one of claims 1 to 3, characterized in that An exhaust gas driving fan (21) is provided at the exhaust port (10) or behind the exhaust port (10), and the exhaust gas driving fan (21) blows air in the exhaust direction.

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