CN211999565U

CN211999565U - Pyrolysis type household garbage treatment furnace

Info

Publication number: CN211999565U
Application number: CN201922358282.3U
Authority: CN
Inventors: 林庆樵
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-12-24
Filing date: 2019-12-24
Publication date: 2020-11-24
Anticipated expiration: 2029-12-24

Abstract

The utility model discloses a pyrolysis type domestic waste treatment furnace, wherein, collect the feeding mechanism including furnace body, feed arrangement, cone ash storage bucket, spiral ash discharging device and return air. The furnace body comprises a pyrolysis layer and a drying layer. The pyrolysis layer comprises a first outer shell, a first inner shell, a first interlayer cavity, a combustion hearth, an oxygen inlet hearth and a pyrolysis chamber. The drying layer comprises a second outer shell, a second inner shell, a second interlayer cavity, a drying chamber and a feeding hole. The return air collecting and supplying device comprises a separator, an oxygen supply air ring, a combustion-supporting air ring, an output connecting pipe, a first return air mechanism, a second return air mechanism, an input main pipe, and a first input branch pipe connected with the first return air mechanism and a second input branch pipe connected with the second return air mechanism are respectively arranged on the input main pipe. The cone ash storage hopper, the pyrolysis chamber, the drying chamber and the feeding device are communicated with each other. The utility model has the advantages of convenient operation, simple structure and stable operation, and the garbage disposal process need not to add combustion-supporting material and the effect that running cost is low.

Description

Pyrolysis type household garbage treatment furnace

Technical Field

The utility model relates to a refuse treatment field, in particular to a pyrolysis type domestic waste treatment furnace for harmless treatment of domestic waste.

Background

In order to protect the national ecological environment most effectively, a great amount of garbage harmless and thorough incineration treatment furnaces pushed by the nation carry out garbage treatment, and the mechanical grate incinerator and the rotary incinerator are mature and widely used at the present stage, however, the incinerator is too complex in structure, garbage pretreatment is needed in the incineration process, and the construction and operation cost is huge. On the basis of the background, a pyrolysis type device is also appeared on the market, but the device is still in the continuous development, research and improvement stage, and has a plurality of defects. For example, the problems of non-uniform pyrolysis, high tar content in tail gas, difficult pipeline cleaning and the like occur in the garbage treatment process.

SUMMERY OF THE UTILITY MODEL

In view of the above problem, the utility model aims to provide a convenient operation, simple structure and operation are stable, and need not to add combustion-supporting material and the low pyrolysis type domestic waste treatment furnace of running cost among the refuse treatment process.

In order to realize the above object, the utility model provides a pair of pyrolysis type domestic waste treatment furnace, wherein, including the furnace body, the feed arrangement who is equipped with in the top of furnace body, the cone ash storage bucket that is equipped with in the below of furnace body, the spiral ash discharging device that is equipped with on cone ash storage bucket bottom, and be equipped with on one side of the furnace body with the furnace body inside communicate with each other and carry out the return air that separates to gas, water, oil and dust and collect supply arrangement. The furnace body includes the pyrolysis layer that is equipped with in cone ash storage bucket top, and the dry layer that is equipped with in pyrolysis layer top. The pyrolysis layer comprises a first outer shell arranged above the cone ash storage hopper, a first inner shell spaced from the first outer shell, a first interlayer cavity formed between the first outer shell and the first inner shell, a combustion hearth arranged above the cone ash storage hopper inside the first inner shell, an oxygen feeding hearth arranged on the cone ash storage hopper below the combustion hearth and used for supplying oxygen to the inside of the first inner shell, and a pyrolysis chamber formed inside the first inner shell above the combustion hearth. The drying layer comprises a second outer shell arranged above the pyrolysis chamber, a second inner shell spaced from the second outer shell, a second interlayer cavity formed between the first outer shell and the second inner shell, a drying chamber formed inside the second inner shell, and a feeding hole connected with a feeding device and arranged at the top of the drying chamber. The return air collecting and supplying device comprises a separator arranged on one side of a furnace body, an oxygen supply air ring which is communicated in a cross shape and is communicated in an annular mode is arranged on the transverse cross section of an oxygen inlet furnace bed in a pyrolysis chamber, a combustion-supporting air ring which is communicated in a cross shape and is communicated in an annular mode is arranged on the transverse cross section of a combustion furnace bed in the pyrolysis chamber, an output connecting pipe which is connected with the combustion-supporting air ring and is used for supplying circulating air is arranged on the separator, a first return air mechanism which penetrates through a first inner shell and a first outer shell and extends to the outside is arranged at the middle position of the pyrolysis chamber, a second return air mechanism which penetrates through the first inner shell and the first outer shell and extends to the outside is arranged at the top position of the pyrolysis chamber, an input main pipe arranged on the separator, and a first input branch pipe connected with the first return air mechanism and a second input branch pipe. The cone ash storage hopper, the pyrolysis chamber, the drying chamber and the feeding device are communicated with each other.

In some embodiments, the first air-returning mechanism includes a middle cross-shaped communicating pipe disposed at a middle position of the pyrolysis chamber, each end of the middle cross-shaped communicating pipe passing through the first inner shell and the first outer shell and extending to the outside, a plurality of longitudinal branch pipes disposed on the middle cross-shaped communicating pipe and vertically downward and communicating with the middle cross-shaped communicating pipe, and air holes disposed on two sides of each longitudinal branch pipe and communicating with the inside of the longitudinal branch pipe. The second return air mechanism comprises a top cross-phase through pipe which is arranged at the top of the pyrolysis chamber, wherein each end of the top cross-phase through pipe penetrates through the first inner shell and the first outer shell and extends to the outside, and a plurality of vertical branch pipes which are vertical downwards and communicated with the top cross-phase through pipe are arranged on the top cross-phase through pipe. The vertical branch pipe is of a structure shaped like a Chinese character 'mi'.

In some embodiments, the oxygen supply air ring comprises a first cross-shaped pipe arranged at the top of the cone ash storage hopper, wherein each end of the first cross-shaped pipe penetrates through the cone ash storage hopper and extends to the outside, a first annular channel communicated with the first cross-shaped pipe is arranged on the first cross-shaped pipe in the cone ash storage hopper, first air holes communicated with the inside of the cone ash storage hopper are arranged on the first cross-shaped pipe and the first annular channel, and damper doors are arranged at the four ends of the first cross-shaped pipe. The combustion-supporting air ring comprises a second cross pipe, a second annular channel and second air holes, wherein the second cross pipe is arranged at the bottom of the pyrolysis chamber, each end part of the second cross pipe penetrates through the pyrolysis chamber and extends to the outside, the second annular channel communicated with the second cross pipe is arranged on the second cross pipe in the cone ash storage hopper, and the second air holes communicated with the inside of the pyrolysis chamber are arranged on the second cross pipe and the second annular channel. One end of the second cross pipe is connected with the output connecting pipe.

In some embodiments, an air draft mechanism is arranged between the first air return mechanism and the combustion-supporting air ring;

the air draft mechanism comprises a flue gas pipeline surrounding the first shell and arranged on the first shell, and a plurality of air draft pipes which are uniformly distributed and penetrate through the first shell and the second shell to communicate the pyrolysis chamber with the flue gas pipeline.

In some embodiments, a downwardly sloping isolation collar is provided on the first inner housing. A plurality of cleaning windows which are uniformly distributed are arranged on the flue gas pipeline. Four air suction openings are symmetrically arranged on two sides of the smoke pipeline. The flue gas pipeline is provided with cleaning holes communicated with the exhaust pipes.

In some embodiments, the lower part and the top part of the first shell are respectively provided with a water filling port and a water outlet which penetrate through the first interlayer cavity, the second shell at the bottom of the second interlayer cavity is provided with a water inlet, and a connecting pipe for communicating the water inlet and the water outlet is arranged between the water inlet and the water outlet. And a steam safety valve for detecting the interior of the second interlayer cavity is arranged at the top of the drying chamber. One side of the steam safety valve is provided with a water outlet communicated with the second interlayer cavity.

In some embodiments, the feeding device comprises a feeding pipe arranged on the feeding port at the top of the drying chamber, a feeding channel communicated with the feeding pipe and arranged on one side of the feeding pipe, a feeding hopper arranged on the end part of the feeding channel, and a material pushing mechanism arranged on the end part of the feeding channel below the feeding hopper. The top of the feeding pipe is provided with a safety door. A sealing cover is arranged between the feeding pipe and the feeding channel. The pushing mechanism comprises a speed reducing motor arranged at the end part of the feeding channel and a screw rod connected with the speed reducing motor and extending to the other end of the feeding channel.

In some embodiments, the pushing mechanism includes a cylinder or an oil cylinder disposed at an end of the feeding channel, a telescopic rod disposed on the cylinder or the oil cylinder and extending into the feeding channel, and a pushing plate disposed at an end of the telescopic rod.

In some embodiments, the pyrolysis layer is provided with an access door which can enter the interior of the pyrolysis layer and the door opening of the access door is slightly inclined inwards and downwards; a temperature control detector is arranged on the pyrolysis layer; the pyrolysis layer on be provided with can observe pyrolysis layer inside and a plurality of first viewing aperture to the lower slope of inside slightly.

In some embodiments, the drying deck is topped with a viewing door communicating with the drying chamber through the second outer casing and the second inner casing. The first input branch pipe and the second input branch pipe are provided with valves. An exhaust fan is arranged on the output connecting pipe.

The beneficial effects of the utility model are specifically as follows: (1) because rubbish when carrying out the pyrolysis in equipment, can produce combustible gas such as a lot of carbon monoxide and vapor, be provided with the ventilator on the output connection pipe in the actual implementation and send into the combustion furnace bed through first return-air mechanism, second return-air mechanism and (gas, water, oil, dirt) separator the combustible gas that the pyrolysis layer produced and directly carry out combustion-supporting and stoving with higher speed to rubbish, so both improved combustion speed, reduced the production and the emission of tail gas and sewage again, realized energy saving and emission reduction's purpose. (2) The pyrolysis layer and the drying layer are provided with a water-cooled cooling interlayer cavity formed between the inner wall plate and the outer wall plate. When the structure is in operation, a large amount of hot water energy can be generated in the interlayer cavity, and then the hot water energy can be utilized to generate electricity, heat, hot water and the like, so that higher economic value is created. (3) The pyrolysis layer is provided with a first air return mechanism and a second air return mechanism which can play a good role in ventilation, so that garbage can be fully and uniformly combusted and pyrolyzed, and the phenomena of piling, overhead and incomplete treatment can be avoided; and the air return channel arranged on the vertical branch pipe of the second air return mechanism is similar to a structure like a Chinese character mi, and the structure can prevent tar blockage caused by lower upper temperature. (4) In order to ensure the stable and safe operation of the equipment, the equipment is provided with a steam safety valve in a cooling interlayer cavity, and the valve is automatically opened to release pressure under the condition of abnormal water temperature; the safety door arranged at the top of the feeding pipe keeps a sealing state by means of negative pressure and dead weight at ordinary times, and when the air pressure in the furnace is overlarge abnormally, the safety door is influenced by the air pressure to open for pressure relief. (5) The access door and the observation port are both arranged in a slightly inward and downward inclined mode, the structure can prevent the problem that residual sewage in garbage and partial water vapor generated during pyrolysis can not flow back when the access door or the observation port is opened, and the occurrence of secondary pollution and hot water injury is avoided. (6) The combustion hearth, the air draft channel, the first air return mechanism and the second air return mechanism which are arranged in the pyrolysis layer are all provided with four connectors, one or two connectors are selected optionally during installation, and the other connectors are plugged by blind plates. Therefore, the effects of convenient operation, simple structure, stable operation, no need of adding combustion-supporting substances in the garbage treatment process and low operation cost are realized.

Drawings

Fig. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic structural view of a second air return mechanism shown in FIG. 1;

fig. 3 is a schematic view of the structure of the combustion hearth shown in fig. 1.

FIG. 4 is a schematic view of the structure of the oxygen feed hearth shown in FIG. 1.

Fig. 5 is a structural schematic diagram of a deformation design of a pushing mechanism in the feeding mechanism shown in fig. 1.

Detailed Description

The following describes the present invention in further detail with reference to the accompanying drawings.

As shown in fig. 1 to 4, a pyrolytic household garbage treating furnace comprises a furnace body 01, a feeding device 02 arranged above the furnace body 01, a cone ash storage hopper 03 arranged below the furnace body 01, a spiral ash discharging device 04 arranged at the bottom of the cone ash storage hopper 03, and a return air collecting and supplying device 05 arranged at one side of the furnace body 01 and communicated with the inside of the furnace body 01 and used for separating air, water, oil and dust. The furnace body 01 comprises a pyrolysis layer 06 arranged above the cone ash storage hopper 03 and a drying layer 07 arranged on the top of the pyrolysis layer 06. The pyrolysis layer 06 comprises a first outer shell 61 arranged above the cone ash hopper 03, a first inner shell 62 spaced apart from the first outer shell 61, a first interlayer cavity 63 formed between the first outer shell 61 and the first inner shell 62, a combustion hearth 64 arranged above the cone ash hopper 03 inside the first inner shell 62, an oxygen feed hearth 65 arranged on the cone ash hopper 03 on one side of the combustion hearth 64 for supplying oxygen to the inside of the first inner shell 62, and a pyrolysis chamber 66 formed inside the first inner shell 62 above the combustion hearth 64. The drying layer 07 includes a second outer shell 71 provided above the pyrolysis chamber 66, a second inner shell 72 spaced apart from the second outer shell 71, a second interlayer cavity 73 formed between the first outer shell 61 and the second inner shell 72, a drying chamber 74 formed inside the second inner shell 72, and a feed inlet 75 provided at the top of the drying chamber 74 and connected to the feeding device 02. The return air collecting and supplying device 05 comprises a separator 51 arranged at one side of the furnace body 01, an oxygen supply air ring 52 which is in cross communication and is in annular through connection with the upper cross section of an oxygen inlet hearth 65 in the pyrolysis chamber 66, a combustion-supporting air ring 53 which is in cross communication and is in annular through connection with the upper cross section of a combustion hearth 64 in the pyrolysis chamber 66, an output connecting pipe 54 which is connected with the combustion-supporting air ring 53 and is used for supplying circulating air is arranged on the separator 51, a first air return mechanism 55 which penetrates through the first inner shell 62 and the first outer shell 61 and extends to the outside is arranged at the middle position of the pyrolysis chamber 66, a second air return mechanism 56 which penetrates through the first inner shell 62 and the first outer shell 61 and extends to the outside is arranged at the top position of the pyrolysis chamber 66, an input main pipe 57 arranged on the separator 51, and a first input branch pipe 58 connected with the first air return mechanism 55 and a second input branch pipe 59 connected with the second air return mechanism 56 are respectively arranged on the input main pipe 57. The cone ash storage hopper 03, the pyrolysis chamber 66, the drying chamber 74 and the feeding device 02 are communicated with each other. The first and second

input branch pipes

58 and 59 are provided with the on-off valves 50, respectively. The first air-returning mechanism 55 comprises a middle cross-shaped through pipe 551, which is provided at the middle position of the pyrolysis chamber 66 and has each end passing through the first inner shell 62 and the first outer shell 61 and extending to the outside, a plurality of longitudinal branch pipes 552, which are vertically downward and are provided on the middle cross-shaped through pipe 551, and air holes 553, which are provided at the two sides of each longitudinal branch pipe 552 and are communicated with the inside of the longitudinal branch pipe 552, respectively. The second air returning mechanism 56 comprises a top cross-shaped through pipe 561 arranged at the top of the pyrolysis chamber 66 and having each end passing through the first inner shell 62 and the first outer shell 61 and extending to the outside, and a plurality of vertical branch pipes 562 arranged on the top cross-shaped through pipe 561 and vertically downward and connected to the top cross-shaped through pipe 561. The vertical branch pipe 562 is a vertical branch pipe of a structure of a shape of a Chinese character mi. The oxygen supply air ring 52 comprises a first cross pipe 521 arranged on the top of the cone ash storage hopper 03 and having each end part penetrating through the cone ash storage hopper 03 and extending to the outside, a first annular channel 522 arranged on the first cross pipe 521 in the cone ash storage hopper 03 and communicated with the first cross pipe 521, a first air hole 523 arranged on the first cross pipe 521 and the first annular channel 522 and communicated with the inside of the cone ash storage hopper 03, and damper doors 524 arranged on the four end parts of the first cross pipe 521. The combustion-supporting air ring 53 includes a second cross-shaped pipe 531 provided at the bottom of the pyrolysis chamber 66 and having each end penetrating through the pyrolysis chamber 66 and extending to the outside, a second annular channel 532 provided on the second cross-shaped pipe 531 in the cone-shaped ash storage hopper 03 and communicating with the second cross-shaped pipe 531, and second air holes 533 provided on the second cross-shaped pipe 531 and the second annular channel 532 and communicating with the inside of the pyrolysis chamber 66. One end of the second cross 531 is connected to the output connection pipe 54. An air draft mechanism 08 is arranged between the first air return mechanism 55 and the combustion-supporting air ring 23; the air draft mechanism 08 comprises a flue gas pipeline 81 which is arranged on the first shell 61 and surrounds the first shell 61, and a plurality of air draft pipes 82 which are uniformly distributed and penetrate through the first shell 61 and the second shell 71 to communicate the pyrolysis chamber 66 and the flue gas pipeline 81 are arranged between the first shell 61 and the flue gas pipeline 81. The first inner housing 62 is provided with a downwardly sloping separation collar 09. A plurality of cleaning windows 10 are arranged on the flue gas duct 81 and are distributed uniformly. The two sides of the flue gas pipeline 81 are symmetrically provided with four air suction ports 11. A cleaning hole 12 is provided on each of the suction pipes 82. The first shell at the bottom and top of the first interlayer cavity 63 is provided with a water filling port 130 and a water outlet 13 respectively, the second shell 71 at the bottom of the second interlayer cavity 73 is provided with a water inlet 14, and a connecting pipe 15 for communicating the water inlet 14 and the water outlet 13 is arranged between the two. The top of the drying chamber 74 is provided with a steam safety valve 16 for detecting the inside of the second interlayer cavity 73. One side of the steam safety valve 16 is provided with a water outlet 17 communicated with the second interlayer cavity 73. The feeding device 02 comprises a feeding pipe 21 arranged on a feeding port 75 at the top of the drying chamber 74, a feeding channel 22 arranged on one side of the feeding pipe 21 and communicated with the feeding pipe 21, a feeding hopper 23 arranged on the end part of the feeding channel 22, and a material pushing mechanism 20 arranged on the end part of the feeding channel 22 below the feeding head. The top of the feeding pipe 21 is provided with a safety door 24. A sealing cover 200 is provided between the feed pipe 21 and the feed passage 22. The pushing mechanism 20 includes a speed reduction motor 25 provided at an end of the feeding passage 22, and a screw rod 26 connected to the speed reduction motor 25 and extending to the other end of the feeding passage 22. The pushing mechanism 20 includes an air cylinder 27 or an oil cylinder provided at an end of the feeding channel 22, an expansion link 28 provided on the air cylinder 27 or the oil cylinder and extending to the feeding channel 22, and a pushing plate 29 provided at an end of the expansion link 28. An access door 18 which can enter the pyrolysis layer 06 and has a slightly inward and downward inclined door opening is arranged on the pyrolysis layer 06; a temperature control detector 19 is arranged on the pyrolysis layer 06; the pyrolysis layer 06 is provided with a plurality of observation ports 210 which can observe the inside of the pyrolysis layer 06 and are slightly inclined inwards and downwards. The top of the drying part 07 is provided with an observation door 211 communicating with the drying chamber 74 through the second outer case 71 and the second inner case 72. An exhaust fan 212 is provided on the output connecting pipe 54.

Embodiment 1 of the pusher mechanism 20 in the feed mechanism

The garbage enters the feed hopper 23, the screw rod 26 is driven to rotate by the speed reducing motor 25, the garbage is pushed forwards from the feed channel 22, when the garbage reaches the automatic sealing cover at the front end of the feed channel 22, the automatic sealing cover is automatically opened under the influence of the pushing force, and the garbage falls into the drying chamber 74 through the feed port 75 to be subjected to pyrolysis treatment;

implementation 2 of the pushing mechanism 20 in the feeding mechanism

As shown in fig. 5, the garbage enters the feeding channel 22 through the feeding hopper 23, then the pneumatic (oil) cylinder 27 drives the telescopic rod 28 to drive the push plate 29 to move forward, so as to push the garbage in the feeding channel 22 forward, when the garbage reaches the automatic sealing cover at the front end of the feeding channel 22, the automatic sealing cover is automatically opened under the influence of the pushing force, the garbage falls into the drying layer chamber through the feeding port 75, after the first stroke is completed, the telescopic rod 28 is driven by the pneumatic (oil) cylinder 28 to return to the original position, and the garbage is put into the feeding hopper 23 again, so as to be fed in a circulating mode.

During operation, garbage is subjected to high-temperature smoldering in the pyrolysis layer 06, a great amount of flue gas containing combustible gas, water vapor and tar is generated in the smoldering process, the flue gas enters the (gas, water, oil and dust) separator 51 from the first gas return mechanism 55, the second gas return mechanism 56 and the input main pipe 57 through the gravity of the exhaust fan 212 arranged on the output connecting pipe 54 for separation treatment, then the combustible gas is sent to the combustion furnace bed 64 through the output connecting pipe 54 and the exhaust fan, is sprayed out through the air holes on the combustion furnace bed 64 to directly support combustion and accelerate drying of the garbage, and part of the gas enters the flue gas pipeline 81 through the exhaust pipe 82 arranged on the exhaust channel and enters a subsequent treatment system through the exhaust port 11.

What has been described above are only some embodiments of the invention. For those skilled in the art, without departing from the inventive concept, several modifications and improvements can be made, which are within the scope of the invention.

Claims

1. A pyrolytic household garbage treatment furnace is characterized by comprising a furnace body, a feeding device arranged above the furnace body, a cone ash storage hopper arranged below the furnace body, a spiral ash discharging device arranged at the bottom of the cone ash storage hopper, and a return air collecting and supplying device which is communicated with the interior of the furnace body and used for separating air, water, oil and dust, wherein one side of the furnace body is provided with the return air collecting and supplying device;

the furnace body comprises a pyrolysis layer arranged above the cone ash storage hopper and a drying layer arranged at the top of the pyrolysis layer;

the pyrolysis layer comprises a first outer shell arranged above the cone ash storage hopper, a first inner shell spaced from the first outer shell, a first interlayer cavity formed between the first outer shell and the first inner shell, a combustion hearth arranged above the cone ash storage hopper in the first inner shell, an oxygen feeding hearth arranged on the cone ash storage hopper below the combustion hearth and used for supplying oxygen to the interior of the first inner shell, and a pyrolysis chamber formed in the first inner shell above the combustion hearth;

the drying layer comprises a second outer shell arranged above the pyrolysis chamber, a second inner shell spaced from the second outer shell, a second interlayer cavity formed between the first outer shell and the second inner shell, a drying chamber formed inside the second inner shell, and a feeding hole connected with the feeding device and arranged at the top of the drying chamber;

the return air collecting and supplying device comprises a separator arranged on one side of a furnace body, an oxygen supply air ring which is communicated in a cross shape and is communicated in an annular mode is arranged on the transverse cross section of an oxygen inlet furnace bed in a pyrolysis chamber, a combustion-supporting air ring which is communicated in a cross shape and is communicated in an annular mode is arranged on the transverse cross section of a combustion furnace bed in the pyrolysis chamber, an output connecting pipe which is connected with the combustion-supporting air ring and is used for supplying circulating air is arranged on the separator, a first return air mechanism which penetrates through a first inner shell and a first outer shell and extends to the outside is arranged at the middle position of the pyrolysis chamber, a second return air mechanism which penetrates through the first inner shell and the first outer shell and extends to the outside is arranged at the top position of the pyrolysis chamber, an input main pipe arranged on the separator, and a first input branch pipe connected with the first return air mechanism and a second input branch pipe connected with;

the cone ash storage hopper, the pyrolysis chamber, the drying chamber and the feeding device are communicated with each other.

2. The pyrolytic household garbage treatment furnace according to claim 1, wherein the first air-returning mechanism comprises a middle cross-shaped communicating pipe provided at the middle position of the pyrolysis chamber and having each end passing through the first inner shell and the first outer shell and extending to the outside, a plurality of longitudinal branch pipes provided on the middle cross-shaped communicating pipe and extending vertically downward and communicating with the middle cross-shaped communicating pipe, and air holes provided at both sides of each longitudinal branch pipe and communicating with the inside of the longitudinal branch pipe;

the second air return mechanism comprises a top cross-shaped through pipe and a plurality of vertical branch pipes, wherein the top cross-shaped through pipe is arranged at the top of the pyrolysis chamber, each end of the top cross-shaped through pipe penetrates through the first inner shell and the first outer shell and extends to the outside, and the vertical branch pipes are arranged on the top cross-shaped through pipe and vertically downwards and are connected with the top cross-shaped through pipe;

the vertical branch pipe is of a structure shaped like a Chinese character 'mi'.

3. The pyrolytic household garbage treatment furnace according to claim 2, wherein the oxygen supply air ring comprises a first cross-shaped pipe provided at the top of the cone ash storage hopper and having each end penetrating through the cone ash storage hopper and extending to the outside, a first annular passage provided on the first cross-shaped pipe in the cone ash storage hopper and communicating with the first cross-shaped pipe, first air holes provided on the first cross-shaped pipe and the first annular passage and communicating with the inside of the cone ash storage hopper, and damper doors provided at the four ends of the first cross-shaped pipe;

the combustion-supporting air ring comprises a second cross pipe, a second annular channel and second air holes, wherein the bottom of the pyrolysis chamber is provided with the second cross pipe, each end part of the second cross pipe penetrates through the pyrolysis chamber and extends to the outside;

one end of the second cross pipe is connected with the output connecting pipe.

4. The pyrolytic household garbage treatment furnace according to claim 1, wherein an air draft mechanism is arranged between the first air return mechanism and the combustion-supporting air ring;

5. The pyrolytic household garbage furnace according to claim 4, wherein the first inner shell is provided with a downward sloping isolation collar;

a plurality of cleaning windows which are uniformly distributed are arranged on the flue gas pipeline;

four air suction ports are symmetrically arranged on two sides of the flue gas pipeline;

the flue gas pipeline is provided with cleaning holes communicated with the exhaust pipes.

6. The pyrolytic household garbage furnace according to claim 1, wherein the lower part and the top of the first shell are respectively provided with a water filling port and a water outlet which penetrate through the first interlayer cavity; a water inlet is formed in the second shell at the bottom of the second interlayer cavity;

a connecting pipe for communicating the water inlet and the water outlet is arranged between the water inlet and the water outlet;

a steam safety valve for detecting the interior of the second interlayer cavity is arranged at the top of the drying chamber;

and a water outlet communicated with the second interlayer cavity is formed in one side of the steam safety valve.

7. The pyrolytic household garbage treatment furnace according to claim 1, wherein the feeding device comprises a feeding pipe arranged on a feeding port at the top of the drying chamber, a feeding channel arranged on one side of the feeding pipe and communicated with the feeding pipe, a feeding hopper arranged on the end part of the feeding channel, and a material pushing mechanism arranged on the end part of the feeding channel below the feeding hopper; a sealing cover is arranged between the feeding pipe and the feeding channel;

the top of the feeding pipe is provided with a safety door;

the pushing mechanism comprises a speed reducing motor arranged at the end part of the feeding channel and a screw rod connected to the speed reducing motor and extending to the other end of the feeding channel.

8. The pyrolytic household garbage treatment furnace according to claim 7, wherein the pushing mechanism comprises an air cylinder or an oil cylinder arranged at the end of the feeding channel, a telescopic rod arranged on the air cylinder or the oil cylinder and stretching out and drawing back to the feeding channel, and a push plate arranged at the end of the telescopic rod.

9. The pyrolytic household garbage treatment furnace according to claim 1, wherein the pyrolytic layer is provided with an access door which can enter the pyrolytic chamber and the door opening of which is slightly inclined inwards and downwards; a temperature control detector is arranged on the pyrolysis layer; the pyrolysis layer on be provided with can observe pyrolysis layer inside and a plurality of first viewing aperture to the lower slope of inside slightly.

10. The pyrolytic household garbage treatment furnace according to claim 1, wherein the top of the drying layer is provided with an observation door communicated with the drying chamber through the second outer shell and the second inner shell;

the first input branch pipe and the second input branch pipe are provided with valves;

and an exhaust fan is arranged on the output connecting pipe.