A high-efficiency domestic waste treatment gasification furnace and use method thereof

Abstract

The present invention proposes a highly efficient gasification furnace for treating domestic waste and a method for using the same. The gasification furnace comprises an upper furnace body and a lower furnace body communicating with the upper furnace body. The lower sides of the upper furnace body and the lower furnace body are both provided with an inverted cone cavity and a first air intake mechanism. The first air intake mechanism comprises an annular air duct arranged outside the inverted cone cavity. The upper edge of the inverted cone cavity is evenly distributed with multiple layers of air intake pipes. The inverted cone cavity is communicated with the annular air duct through the air intake pipe. The upper end of the lower furnace body is provided with a feed port and a first spray gun socket, and the lower end is provided with an ash outlet. The upper end of the upper furnace body is provided with a second air intake mechanism and a smoke outlet, and the lower end is provided with a second spray gun socket. The present invention is conducive to the complete pyrolysis and gasification of domestic waste in the gasification furnace and the full combustion of the pyrolysis gas.

Description

Technical Field

[0001] The invention relates to the technical field of gasifiers, and in particular to a high-efficiency domestic garbage treatment gasifier and a use method thereof. Background Art

[0002] The existing gasification furnaces for treating domestic waste have problems such as incomplete pyrolysis and gasification of domestic waste, the gas produced after pyrolysis and gasification contains components that are harmful to the human body, and is not fully burned. It is difficult to purify it later, and the treatment cost is high. In addition, the existing gasification furnaces will generate high temperatures during the pyrolysis and gasification process, which seriously threatens the safety of the equipment. In order to ensure the rigidity and stability of the overall structure, a jacket is generally set on the outside and cooled by water cooling. This method not only requires the addition of a water reservoir, but also requires the use of a water pump to provide water circulation power, and the circulating water is sprayed to cool it down, which wastes energy and has a high investment cost. At the same time, the heat of the furnace energy is taken away, resulting in waste. The existing domestic waste treatment gasification furnace has a low degree of automation and cannot effectively control the gasification process. Summary of the invention

[0003] The present invention provides a high-efficiency domestic waste treatment gasification furnace and a use method thereof, which are beneficial to the complete pyrolysis and gasification of domestic waste in the gasification furnace and the full combustion of the pyrolysis gas.

[0004] The technical solution of the present invention is achieved as follows: a high-efficiency domestic waste treatment gasification furnace, comprising an upper furnace body and a lower furnace body communicated with the upper furnace body, the lower sides of the upper furnace body and the lower furnace body are provided with an inverted cone cavity and a first air intake mechanism, the first air intake mechanism includes an annular air duct arranged on the outside of the inverted cone cavity, a plurality of layers of air intake pipes are evenly distributed along the circumference of the inverted cone cavity, the inverted cone cavity is communicated with the annular air duct through the air intake pipe, a feed port and a first spray gun socket are provided at the upper end of the lower furnace body, an ash outlet is provided at the lower end, a second air intake mechanism and a smoke outlet are provided at the upper end of the upper furnace body, and a second spray gun socket is provided at the lower end.

[0005] Furthermore, the second air intake mechanism includes an air intake duct arranged on the top of the upper furnace body, the lower end of the air intake duct extends into the upper furnace body, and is provided with multiple layers of air outlets. Each layer of air outlets rotates out obliquely, and the rotation directions of two adjacent layers of air outlets are opposite, the positions are staggered, and the angles are different.

[0006] Furthermore, the upper furnace body and the lower furnace body both include a refractory layer, a refractory ceramic fiber blanket and a furnace body barrel section which are arranged in sequence from the inside to the outside, the refractory layer includes a refractory casting layer, the refractory casting layer forms an inverted cone-shaped cavity, a refractory brick layer is arranged on the upper side of the refractory casting layer, a plurality of fixing rings are arranged on the outer side of the refractory brick layer, and the annular air duct is located between the refractory casting layer and the refractory ceramic fiber blanket.

[0007] Furthermore, refractory casting material and asbestos rope are filled between the upper furnace body and the lower furnace body, and the asbestos rope is located outside the refractory casting material.

[0008] Furthermore, the second air intake mechanism also includes a safety valve, which includes a valve body fixed to the upper end of the air intake duct, the lower end of the valve body is communicated with the upper furnace body, and the upper end is hinged with a deadweight compression cover.

[0009] Furthermore, the feed port is arranged upwardly with an inclination, and a hydraulic feeder is arranged at the feed port, the hydraulic feeder includes a feeding barrel, one end of the feeding barrel is placed at the feed port, and a hydraulic cylinder is arranged at the other end, and travel switches are arranged at both ends of the hydraulic cylinder. A sliding pushing barrel is arranged in the feeding barrel, and the pushing barrel is connected to the working end of the hydraulic cylinder, and a touch device cooperating with the travel switch is arranged on the pushing barrel.

[0010] Furthermore, upper ends of the upper furnace body and the lower furnace body are both provided with upper sealing plates, and lower ends are both provided with lower sealing plates.

[0011] Furthermore, temperature measuring side pressure connectors and thermocouple mounting seats are fixed on the upper furnace body and the lower furnace body. The thermocouple mounting seat is located at the lower end of the inverted cone cavity. A temperature sensor is arranged at the thermocouple mounting seat, and a material level meter is arranged at the upper end of the lower furnace body.

[0012] Furthermore, a manhole is provided on the lower furnace body, and an openable furnace door is provided at the manhole.

[0013] The method for using the high-efficiency domestic waste treatment gasifier comprises the following steps:

[0014] (1) Add auxiliary fuel to the bottom of the lower furnace body through the feed port, then add domestic garbage to the lower furnace body, ignite from the first spray gun socket, and send air into the lower furnace body from the annular air duct and the air inlet pipe of the lower furnace body. The domestic garbage is pyrolyzed and gasified in the lower furnace body to generate combustible gas. After the domestic garbage is gasified, ash is discharged through the ash outlet;

[0015] (2) The combustible gas generated in step (1) enters the upper furnace body, is ignited from the second spray gun socket, and then is supplied to the upper furnace body from the annular air duct and the air inlet pipe of the upper furnace body. At the same time, according to the temperature and pressure values ​​in the upper furnace body, the second air inlet mechanism supplies air to the upper furnace body;

[0016] (3) After the combustible gas is burned, the generated flue gas can be discharged through the flue gas outlet.

[0017] Beneficial effects of the present invention:

[0018] The gasifier of the present invention has a compact structure, is easy to manufacture, has low cost investment, is energy-saving and environmentally friendly, and the waste heat can be reused. In addition, the gasifier has little secondary pollution, is completely harmless, and has a high degree of resource utilization. The structural design of the first air intake mechanism and the second air intake mechanism is more conducive to the complete pyrolysis and gasification of township domestic waste in the gasifier, ensuring that all domestic waste can be completely burned without affecting the discharge of domestic waste after combustion; then, the combustible gas and harmful gases such as nitrogen oxides and dioxins generated by pyrolysis are introduced into and out of the furnace body for sufficient combustion high-temperature treatment, thereby reducing the harmful gases remaining in the high-temperature flue gas. Finally, the high-temperature flue gas is easier to handle after being preheated by a heat exchanger, so that it meets the emission standards.

[0019] The upper furnace body and the lower furnace body of the present invention are both composed of refractory bricks and refractory castables to avoid high temperature being transferred to the external furnace body cylinder section. This method does not require the use of jacket water circulation for cooling, which not only reduces costs but also reduces heat loss, so that the flue gas has a higher heat exchange efficiency when passing through the heat exchanger, and better utilizes the waste heat; the present invention has multiple fixing rings fixed on the outside of the refractory brick layer, which play a role in stabilizing the refractory bricks, and cooperates with the arrangement of the upper and lower sealing plates to ensure the rigidity and stability of the overall structure, which is not only convenient for transportation, but also improves the reliability of the structure and ensures product quality; through the arrangement of temperature and pressure measuring elements, temperature sensors, and level meters, it is convenient to automatically control the feeding and air intake, thereby improving the efficiency of domestic waste treatment. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 It is a structural schematic diagram of the gasifier of the present invention;

[0022] Figure 2 It is a structural schematic diagram of the lower furnace body;

[0023] Figure 3 is a structural schematic diagram of a first air intake mechanism;

[0024] Figure 4 It is a structural schematic diagram of the upper furnace body;

[0025] Figure 5 is a structural schematic diagram of the second air intake mechanism;

[0026] Figure 6 is a schematic diagram of the structure of the air outlet;

[0027] Figure 7It is a structural diagram of the hydraulic feeder.

[0028] Upper furnace body 1, lower furnace body 2, refractory casting material 3, asbestos rope 4, inverted cone cavity 5, annular air duct 6, air inlet pipe 7, feed port 8, first spray gun socket 9, ash outlet 10, smoke outlet 11, second spray gun socket 12, air inlet duct 13, air outlet 14, air duct 15, refractory casting sleeve 16, safety valve 17, valve body 18, deadweight pressing cover 19, refractory ceramic fiber blanket 20, furnace body barrel section 21, refractory casting layer 22, refractory brick layer 23, fixing ring 24, upper sealing plate 25, lower sealing plate 26, middle sealing plate 27, feeding barrel 28, hydraulic cylinder 29, travel switch 30, pushing barrel 31, touch device 32, temperature measuring side pressure connector 33, thermocouple mounting seat 34, material level meter 35, manhole 36, furnace door 37. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] like Figure 1-4 As shown, a high-efficiency gasification furnace for treating domestic waste comprises an upper furnace body 1 and a lower furnace body 2 communicated with the upper furnace body 1, the upper furnace body 1 and the lower furnace body 2 are coaxially arranged, refractory casting material 3 and asbestos rope 4 are filled between the upper furnace body 1 and the lower furnace body 2, the asbestos rope 4 is located on the outside of the refractory casting material 3, after the upper furnace body 1 and the lower furnace body 2 are installed in place, the two are welded together by full welding, three ear-type supports are fixed on the lower furnace body 2, and the ear-type supports are connected to the legs by fasteners.

[0031] An inverted cone-shaped cavity 5 and a first air intake mechanism are provided on the lower side of the upper furnace body 1 and the lower furnace body 2. The first air intake mechanism includes an annular air duct 6 arranged on the outside of the inverted cone-shaped cavity 5. A plurality of air inlet pipes 7 are evenly distributed along the circumference of the inverted cone-shaped cavity 5, specifically including three layers of annular evenly distributed air inlet pipes 7 arranged from bottom to top. The inverted cone-shaped cavity 5 is connected with the annular air duct 6 through the air inlet pipe 7. Air enters the lower furnace body 2 through the annular air duct 6 and the air inlet pipe 7. The upper furnace body 1 and the lower furnace body 2 both adopt an annular air duct 6 in combination with a plurality of air inlet pipes 7 to evenly supply air around the inverted cone-shaped cavity 5, which can fully supply oxygen. Moreover, each layer of air inlet pipes 7 is arranged tangentially, and the rotation directions between the layers are opposite, which is more conducive to the thorough and sufficient oxidation-reduction reaction of township domestic waste in the gasification furnace and the sufficient combustion of combustible gas and harmful gas.

[0032] A feed port 8 and a first spray gun socket 9 are provided at the upper end of the lower furnace body 2, and an ash outlet 10 is provided at the lower end. A second air intake mechanism and a smoke outlet 11 are provided at the upper end of the upper furnace body 1, and a second spray gun socket 12 is provided at the lower end. The second spray gun socket 12 extends obliquely into the interior of the upper furnace body 1, making it easier to ignite the pyrolysis gas; the smoke outlet 11 rotates out tangentially, which conforms to aerodynamics.

[0033] The method for using the high-efficiency domestic waste treatment gasifier comprises the following steps:

[0034] (1) A small amount of biomass materials such as wood chips are added to the bottom of the lower furnace body 2 through the feed port 8 to assist combustion, and then the lower furnace body 2 is filled with township domestic garbage. After the spray gun is ignited from the first spray gun socket 9, air is sent into the lower furnace body 2 through the annular air duct 6 and the air inlet pipe 7 of the lower furnace body 2 by the blower. The domestic garbage undergoes four thermochemical reaction processes of oxidation, reduction, pyrolysis and drying in the lower furnace body 2 and generates combustible gas. After the garbage is gasified, the ash is discharged through the ash outlet 10;

[0035] (2) The combustible gas generated in step (1) enters the upper furnace body 1, and after the spray gun is ignited from the second spray gun socket 12, the blower supplies air into the upper furnace body 1 through the annular air duct 6 and the air inlet pipe 7 of the upper furnace body 1. At the same time, according to the temperature and pressure values ​​in the upper furnace body 1, the second air intake mechanism supplies air into the upper furnace body 1;

[0036] (3) After the combustion of combustible gases and harmful substances is completed, the generated harmless gases can be discharged through the flue gas outlet 11; after the flue gas is discharged, the waste heat is utilized by the heat exchanger, and the cooled flue gas is dedusted by the bag filter, and finally, it is desulfurized and deacidified by the spray tower as needed, and discharged through the chimney after passing the test.

[0037] like Figure 1 , 4 , 5 and 6, the second air intake mechanism includes an air intake duct 13 fixed to the top of the upper furnace body 1, the lower end of the air intake duct 13 extends to the high temperature zone in the upper furnace body 1, that is, near the inverted cone cavity 5 in the upper furnace body 1, and multiple layers of air outlets 14 are arranged on the air intake duct 13. The air intake duct 13 includes an air delivery pipe 15, and a refractory casting sleeve 16 is arranged on the outer side of the air delivery pipe 15. The refractory casting sleeve 16 is cast by refractory casting material, and the refractory casting sleeve 16 plays a role of heat insulation protection for the air intake duct 13, which is conducive to its extension into the high temperature zone of the furnace body. The air outlet 14 is arranged on the refractory casting sleeve 16, including three layers of air outlets 14 arranged from top to bottom, and each layer of air outlets 14 is obliquely rotated out, and the rotation directions of the adjacent two layers of air outlets 14 are opposite, the positions are staggered, and the angles are different. This method enables the combustible gas and air to be fully mixed and burned, thereby improving the combustion effect.

[0038] The second air intake mechanism also includes a safety valve 17. The integration of the safety valve 17 and the air intake duct 13 makes the structure of the furnace body simpler and more compact. The safety valve 17 includes a valve body 18 fixed to the upper end of the air intake duct 13. The lower end of the valve body 18 is connected to the upper cover of the upper furnace body 1 through a flange. The lower end of the valve body 18 is in communication with the upper furnace body 1. The upper end is hinged with a self-weight pressing cover 19. The self-weight pressing cover 19 is a self-weight pressing asbestos packing that closes the safety port. Once the pressure in the furnace exceeds the safety pressure, the self-weight pressing cover 19 of the safety valve 17 will automatically lift up to release the pressure, and automatically return to its position after the pressure is reduced, thereby improving the safety environment of the operating workers and avoiding the hidden danger of furnace explosion caused by the blockage of the pyrolysis gas flow.

[0039] like Figure 1 , 2 As shown in Figure 4, the upper furnace body 1 and the lower furnace body 2 both include a refractory layer, a refractory ceramic fiber blanket 20 and a furnace body barrel section 21 arranged in sequence from the inside to the outside, and the annular air duct 6 is located between the refractory castable layer and the refractory ceramic fiber blanket 20. The refractory layer includes a refractory castable layer 22, and the refractory castable layer 22 forms an inverted cone cavity 5. The inverted cone cavity 5 is cast in a forming mold using refractory castables, which is convenient for the processing and forming of the inverted cone cavity 5. This processing method is not only convenient and quick to manufacture, but also has a more regular structure shape, which is conducive to the pyrolysis reaction and the smooth discharge of smoke. It is not easy to process an inverted cone structure using refractory bricks. The upper side of the refractory castable layer is an annular refractory brick layer 23 built with refractory bricks. The outer side of the refractory brick layer 23 is vertically fixed with multiple fixing rings 24. The fixing rings 24 play a role in stabilizing the refractory bricks, ensuring the rigidity and stability of the overall structure, which is not only convenient for transportation, but also improves the reliability of the structure and ensures product quality.

[0040] The upper ends of the upper furnace body 1 and the lower furnace body 2 are both provided with an upper sealing plate 25, and the lower ends are both provided with a lower sealing plate 26. The furnace body cylinder section 21 is a carbon steel cylinder. The upper sealing plate 25 is welded to the upper end of the furnace body cylinder section 21, and the lower sealing plate 26 is welded to the lower end of the furnace body cylinder section 21. The upper sealing plate 25 and the lower sealing plate 26 are provided to prevent the refractory bricks from scattering during the transportation of the furnace body. In addition, the upper furnace body 1 is designed as a coaxial two-section cylinder, which increases the combustion space. The upper end of each section of the cylinder is fixed with an upper sealing plate 25, and the lower end is fixed with a lower sealing plate 26. The junction of the two sections of the cylinder is also fixed with an intermediate sealing plate 27.

[0041] like Figure 2 and 7 As shown, the feed port 8 is tilted upward with an inclination angle of 5°. A hydraulic feeder is provided at the feed port 8. The hydraulic feeder is tiltedly installed at the feed port 8 and is welded and fixedly connected to the lower furnace body 2. The tilted setting of the hydraulic feeder ensures that the moisture generated when the domestic waste with a high moisture content is squeezed directly enters the furnace body to participate in the pyrolysis reaction.

[0042] The hydraulic feeder includes a feeding barrel 28, on which a chute is fixed, the lower end of the chute is consistent with the inclination angle of the feeding barrel 28, and the upper end of the chute is designed to be flush, ensuring that the domestic garbage conveyed by the belt enters the chute smoothly. One end of the feeding barrel 28 is fixed at the feed port 8, and the other end is fixed with a hydraulic cylinder 29, and both ends of the hydraulic cylinder 29 are fixed with a travel switch 30. A sliding push barrel 31 is arranged in the feeding barrel 28, and the push barrel 31 is connected to the working end of the hydraulic cylinder 29. A touch device 32 cooperating with the travel switch 30 is fixed on the push barrel 31, and the touch device 32 includes a connecting rod fixedly connected to the push barrel 31, and a touch plate is fixed at the end of the connecting rod away from the push barrel 31. As the hydraulic cylinder 29 extends and retracts, the touch device 32 and the push barrel 31 move synchronously, and the touch device 32 hits the travel switch 30, sending a signal to change the movement direction of the hydraulic cylinder 29; the travel switch 30 is fixed to the hydraulic cylinder 29 by a stainless steel hoop, and the stainless steel hoop can be adjusted to change the position of the travel switch 30 as needed.

[0043] like Figure 1 and 2 As shown, the upper furnace body 1 and the lower furnace body 2 are both fixed with a temperature measuring side pressure connector 33 and a thermocouple mounting seat 34, a temperature measuring side pressure element is installed at the temperature measuring side pressure connector 33, a material level meter 35 is arranged on the lower furnace body 2, the material level meter 35 is located at the upper end of the lower furnace body 2, the thermocouple mounting seat 34 is located at the lower end of the inverted cone cavity 5, a temperature sensor is installed at the thermocouple mounting seat 34, after ignition from the first spray gun socket 9 or the second spray gun socket 12, when heated to a preset value, the temperature sensor at the corresponding thermocouple mounting seat 34 sends a signal to close the spray gun. The second air intake mechanism is connected to the variable frequency fan, and the second air intake mechanism in the upper furnace body 1 changes the air intake volume by adjusting the frequency of the variable frequency fan according to the temperature and pressure values ​​measured by the temperature and pressure measuring elements.

[0044] The touch device 32 and the travel switch 30 of the hydraulic feeder can be linked with the signal fed back to the controller by the material level meter 35 and the temperature and pressure measuring elements to control the feeding speed and the amount of feeding. The biomass raw materials are added to the lower furnace body 2 through the hydraulic feeder to assist combustion, and then the town and village domestic garbage is added. The material level meter 35 can detect the material level height, transmit the signal to the control system, and control the hydraulic feeder to feed according to the material level.

[0045] A manhole 36 is provided on the lower furnace body 2, and an openable furnace door 37 is provided at the manhole 36. The furnace door 37 is a quick-opening structure, which can be opened and closed quickly and conveniently for maintenance. Lifting ears are fixed on both the upper furnace body 1 and the lower furnace body 2 for easy lifting.

[0046] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A high-efficiency domestic waste treatment gasification furnace, characterized in that: It comprises an upper furnace body and a lower furnace body communicated with the upper furnace body, the lower sides of the upper furnace body and the lower furnace body are both provided with an inverted cone cavity and a first air intake mechanism, the first air intake mechanism comprises an annular air duct arranged outside the inverted cone cavity, a plurality of air intake pipes are evenly distributed along the circumference of the inverted cone cavity, each layer of air intake pipes is arranged tangentially, and the rotation directions between the layers are opposite, the inverted cone cavity is communicated with the annular air duct through the air intake pipe, the upper end of the lower furnace body is provided with a feed port and a first spray gun socket, and the lower end is provided with an ash outlet, the upper end of the upper furnace body is provided with a second air intake mechanism and a smoke outlet, and the lower end is provided with a second spray gun socket; The second air intake mechanism includes an air intake duct arranged on the top of the upper furnace body, the lower end of the air intake duct extends into the upper furnace body, and is provided with multiple layers of air outlets, each layer of air outlets rotates obliquely, and the rotation directions of the air outlets on two adjacent layers are opposite, the positions are staggered, and the angles are different; Both the upper furnace body and the lower furnace body include a refractory layer, a refractory ceramic fiber blanket and a furnace body barrel section which are arranged in sequence from the inside to the outside. The refractory layer includes a refractory casting layer, which forms an inverted cone-shaped cavity. A refractory brick layer is arranged on the upper side of the refractory casting layer, and multiple fixing rings are arranged on the outer side of the refractory brick layer. The annular air duct is located between the refractory casting layer and the refractory ceramic fiber blanket.

2. A high-efficiency domestic waste treatment gasification furnace according to claim 1, characterized in that: Refractory casting material and asbestos rope are filled between the upper furnace body and the lower furnace body, and the asbestos rope is located outside the refractory casting material.

3. The high-efficiency domestic waste treatment gasification furnace according to claim 1, characterized in that: The second air intake mechanism also includes a safety valve, which includes a valve body fixed to the upper end of the air intake duct, the lower end of the valve body is communicated with the upper furnace body, and the upper end is hinged with a deadweight pressing cover.

4. The high-efficiency domestic waste treatment gasification furnace according to claim 1, characterized in that: The feed port is arranged upwardly with an inclination, and a hydraulic feeder is arranged at the feed port, the hydraulic feeder comprises a feed barrel, one end of the feed barrel is placed at the feed port, and a hydraulic cylinder is arranged at the other end, and travel switches are arranged at both ends of the hydraulic cylinder. A sliding push barrel is arranged in the feed barrel, and the push barrel is connected to the working end of the hydraulic cylinder, and a touch device cooperating with the travel switch is arranged on the push barrel.

5. The high-efficiency domestic waste treatment gasification furnace according to claim 1, characterized in that: The upper ends of the upper furnace body and the lower furnace body are both provided with upper sealing plates, and the lower ends are both provided with lower sealing plates.

6. A high-efficiency domestic waste treatment gasification furnace according to claim 1 or 4, characterized in that: Temperature and pressure measuring connectors and thermocouple mounting seats are fixed on the upper furnace body and the lower furnace body. The thermocouple mounting seat is located at the lower end of the inverted cone cavity. A temperature sensor is arranged at the thermocouple mounting seat. A material level meter is arranged at the upper end of the lower furnace body.

7. The high-efficiency domestic waste treatment gasification furnace according to claim 1, characterized in that: A manhole is arranged on the lower furnace body, and an openable furnace door is arranged at the manhole.

8. A method for using the high-efficiency domestic waste treatment gasifier according to any one of claims 1 to 7, characterized in that: The following steps are involved: (1) Add auxiliary fuel to the bottom of the lower furnace body through the feed port, then add domestic garbage to the lower furnace body, ignite from the first spray gun socket, and send air into the lower furnace body from the annular air duct and air inlet pipe of the lower furnace body. The domestic garbage is pyrolyzed and gasified in the lower furnace body to generate combustible gas. After the domestic garbage is gasified, ash is discharged through the ash outlet; (2) The combustible gas generated in step (1) enters the upper furnace body, is ignited from the second spray gun socket, and then is supplied to the upper furnace body from the annular air duct and the air inlet pipe of the upper furnace body. At the same time, according to the temperature and pressure values ​​in the upper furnace body, the second air inlet mechanism supplies air to the upper furnace body; (3) After the combustion of combustible gases and harmful substances is completed, the generated harmless gases can be discharged through the flue gas outlet; After the flue gas is discharged, it passes through the heat exchanger to utilize the waste heat. The cooled flue gas is dedusted by a bag filter and finally desulfurized and deacidified by a spray tower as needed. It is discharged through the chimney after passing the test.

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