Miniaturized rake type multi-stage air supply pyrolysis gasification furnace

Abstract

The invention relates to the technical field of waste incineration, in particular to a miniaturized rake type multistage air supply pyrolysis gasification furnace which comprises a support, a furnace body, a stepped cascade grate, an air supply pipe, two connecting pipes, a plurality of air distribution pipes, a plurality of material pushing shovels, a plurality of crushing blades, two slag scraping assemblies, a discharging assembly, a power assembly and an air supply assembly. The furnace body is provided with a feeding hole and a smoke outlet; the slag scraping assembly comprises a mounting plate, an axial material scraping shovel, an axial spring and a guide column, the mounting plate is fixedly connected with the corresponding air distribution pipe, one end of the guide column is fixedly connected with the mounting plate, the other end of the guide column is in sliding connection with the axial material scraping shovel, and the two ends of the axial spring are fixedly connected with the mounting plate and the axial material scraping shovel correspondingly; in this way, the technical problems that in the prior art, when a pyrolysis gasification furnace for waste incineration is used, the stirring, crushing and mixing effects are poor, and when materials are discharged after burning out, ash residues are prone to caking and adhering to the grate, and consequently normal discharging cannot be achieved are solved.

Description

Technical Field

[0001] The invention relates to the technical field of garbage incineration, and in particular to a miniaturized rake-type multi-stage air supply pyrolysis gasification furnace. Background Art

[0002] Waste incineration is a method of high-temperature treatment of waste. Through the combustion process in the high-temperature incinerator, the combustible components in the waste undergo a violent chemical reaction with the oxygen in the air, converting them into high-temperature combustion gases and solid residues with stable properties, and releasing heat. The waste that can be treated by water waste incineration includes common domestic waste, food residues, wood waste, sawdust, etc. The use of waste incineration to treat waste has significant advantages in terms of reduction, harmlessness and resource utilization.

[0003] In the prior art, when it comes to waste incineration, a pyrolysis gasification furnace for waste incineration can be used. The pyrolysis gasification furnace for waste incineration is a device specially designed to treat waste and convert it into gas, liquid and solid products through a pyrolysis gasification process. It is an efficient and environmentally friendly waste treatment equipment.

[0004] However, the existing pyrolysis gasification furnace for waste incineration has poor stirring, crushing and mixing effects during use, and when discharging after combustion, the ash and slag are easy to agglomerate and adhere to the grate, resulting in failure to discharge normally. Summary of the invention

[0005] The purpose of the present invention is to provide a miniaturized rake-type multi-stage air supply pyrolysis gasification furnace, aiming to solve the technical problems that the pyrolysis gasification furnace used for garbage incineration in the prior art has poor stirring, crushing and mixing effects during use, and the ash and slag are easy to agglomerate and adhere to the grate when discharging after combustion, resulting in failure to discharge normally.

[0006] To achieve the above-mentioned purpose, the present invention adopts a miniaturized rake-type multi-stage air supply pyrolysis gasification furnace, comprising a bracket, a furnace body, a stepped stacked grate, an air supply pipe, two connecting pipes, a plurality of air distribution pipes, a plurality of pusher shovels, a plurality of crushing blades, two groups of scraper assemblies, a discharge assembly, a power assembly and an air supply assembly, wherein the furnace body is arranged on the bracket, the furnace body has a feed inlet and a smoke exhaust port, the stepped stacked grate is arranged on the furnace body, the first and second levels of the stepped stacked grate are drying grates, the third and fourth levels of the stepped stacked grate are combustion grates, and the stepped The fifth stage of the stepped grate is a combustion discharge grate, the air supply pipe is rotatably connected to the stepped grate, and the air supply pipe is connected to the furnace body through a detachable support ring and a circumferential bearing, the two connecting pipes are both connected to the air supply pipe, a plurality of branch air pipes are respectively connected to the corresponding connecting pipes, a plurality of pusher shovels are respectively connected to the corresponding branch air pipes, a plurality of crushing blades are connected to the stepped grate, and the pusher shovel is provided with a crushing groove adapted to the corresponding crushing blade, and the power assembly is used to drive the air supply pipe to rotate; The scraper assembly includes a mounting plate, an axial scraper shovel, an axial spring and a guide column. The mounting plate is fixedly connected to the corresponding air distribution pipe, one end of the guide column is fixedly connected to the mounting plate, and the other end of the guide column is slidably connected to the axial scraper shovel. Both ends of the axial spring are respectively fixedly connected to the mounting plate and the axial scraper shovel. The axial scraper shovel is in contact with the burnout discharge grate, and the air supply assembly is connected to the air supply pipe through an axial thrust bearing.

[0007] Wherein, the scraper assembly also includes a circumferential scraper shovel and a circumferential spring. The circumferential scraper shovel is slidably connected to the axial scraper shovel, and the two ends of the circumferential spring are respectively fixedly connected to the axial scraper shovel and the circumferential scraper shovel.

[0008] Wherein, each of the air distribution pipes is provided with at least two first air supply holes; Each step edge of the drying grate and the combustion grate is provided with three discharge troughs, and the depths of the three discharge troughs gradually increase along the rotation direction of the air supply pipe.

[0009] Wherein, the power assembly includes a reduction motor and a gear transmission unit, the reduction motor is installed on the furnace body, and the output end of the reduction motor is connected to the air supply pipe through the gear transmission unit.

[0010] Among them, the unloading assembly includes a discharge chute, a slag discharge cylinder, a guide limit clamp, a slag discharge arc plug plate and a wear-resistant sealing ring. The discharge chute is arranged on the furnace body, the slag discharge cylinder and the guide limit clamp plate are both installed on the furnace body, the output end of the slag discharge cylinder is fixedly connected to the slag discharge arc plug plate, and the slag discharge arc plug plate is slidably sealed with the furnace body through the wear-resistant sealing ring.

[0011] Wherein, the air supply assembly includes a first fan and an air supply pipe, the air supply pipe is connected to the air supply pipe through an axial thrust bearing, and the first fan is used to supply air to the air supply pipe.

[0012] Among them, the miniaturized rake-type multi-stage air supply pyrolysis gasification furnace also includes a second fan and an air inlet pipe, the air inlet pipe is connected to the stepped stacked grate, the second fan is used to connect to the air inlet pipe, and the stepped stacked grate is provided with a plurality of second air supply holes.

[0013] The miniaturized rake-type multi-stage air supply pyrolysis gasification furnace of the present invention, when in use, the garbage to be processed enters the furnace body through the feed port, falls to the stepped stacked grate, and is dried by the drying grate. At the same time, the power assembly is started, the power assembly drives the air supply pipe to rotate, the air supply pipe drives the two connecting pipes to rotate, the two connecting pipes drive the multiple air branch pipes to rotate, the multiple air branch pipes drive the multiple pusher shovels to make circular motion, the pusher shovels on the drying grate push the waste on the drying grate to move, and in this process, the crushing blade passes through the crushing groove, and the clumped waste is broken up and divided by the action of the crushing blade and the pusher shovel, so that the larger waste can be broken up, and the broken waste The waste falls onto the combustion grate under the action of the pushing shovel for combustion. During combustion, the pushing shovel on the combustion grate rotates to drive the waste on the combustion grate to move, so that the waste can be further broken up and divided, making the combustion more complete. After the combustion is completed, the pushing shovel on the combustion grate drops the ash onto the burnout discharge grate. At this time, the corresponding air distribution duct will drive the mounting plate to move, and the mounting plate will drive the axial scraper shovel to move to scrape off the ash on the burnout discharge grate, and the axial scraper shovel is always held against the burnout discharge grate by the axial spring, thereby improving the scraping effect of the axial scraper shovel on the burnout discharge grate, and at the same time, the guide column can prevent the axial scraper shovel from axially rotating; Furthermore, when the mounting plate moves, the circumferential scraper shovel is driven to rotate by the axial scraper shovel, so that the circumferential scraper shovel scrapes off the ash on the side wall between the combustion grate and the ember discharge grate, further improving the discharge effect; This solves the technical problem that the pyrolysis gasification furnace used for garbage incineration in the prior art has poor stirring, crushing and mixing effects during use, and the ash slag easily agglomerates and sticks to the grate when discharging after combustion, resulting in failure to discharge normally. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] 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.

[0015] Figure 1 It is a structural schematic diagram of a miniaturized rake-type multi-stage air supply pyrolysis gasification furnace of the present invention.

[0016] Figure 2 It is a partial structural schematic diagram of the miniaturized rake-type multi-stage air supply pyrolysis gasification furnace of the present invention.

[0017] Figure 3 It is a structural schematic diagram of the stepped stacked grate of the present invention.

[0018] Figure 4 It is a partial structural schematic diagram of a miniaturized rake-type multi-stage air supply pyrolysis gasification furnace of the present invention.

[0019] Figure 5 The present invention Figure 2 A magnified view of the local structure at A.

[0020] 101- bracket, 102- furnace body, 103- stepped stacked grate, 104- air supply pipe, 105- connecting pipe, 106- air distribution pipe, 107- pushing shovel, 108- crushing blade, 109- mounting plate, 110- axial scraper shovel, 111- axial spring, 112- guide column, 113- circumferential scraper shovel, 114- circumferential spring, 115- first air supply hole, 116- discharge chute, 117- reduction motor, 118- gear transmission unit, 119- discharge chute, 120- slag discharge cylinder, 121-guide limit card plate, 122-slag discharge arc plug plate, 123-wear-resistant sealing ring, 124-first fan, 125-gas pipe, 126-second fan, 127-air inlet pipe, 128-second air supply hole, 129-breaking cone, 130-spreading umbrella, 131-breaking groove, 132-feeding port, 133-smoke exhaust port, 134-drying grate, 135-combustion grate, 136-burnt ember discharge grate, 137-axial thrust bearing, 138-detachable support ring, 139-circumferential bearing. DETAILED DESCRIPTION

[0021] Embodiments of the present invention are described in detail below. Examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, but should not be construed as limiting the present invention.

[0022] See also Figure 1~Figure 5 ,in Figure 1 It is a structural schematic diagram of a miniaturized rake-type multi-stage air supply pyrolysis gasification furnace of the present invention. Figure 2 It is a partial structural schematic diagram of the miniaturized rake-type multi-stage air supply pyrolysis gasification furnace of the present invention. Figure 3 is a schematic structural diagram of a stepped stacked grate of the present invention, Figure 4 It is a partial structural schematic diagram of a miniaturized rake-type multi-stage air supply pyrolysis gasification furnace of the present invention. Figure 5 The present invention Figure 2 A magnified view of the local structure at A.

[0023] The present invention provides a miniaturized rake-type multi-stage air supply pyrolysis gasification furnace, comprising a support 101, a furnace body 102, a stepped stacked grate 103, an air supply pipe 104, two connecting pipes 105, a plurality of air distribution pipes 106, a plurality of pusher shovels 107, a plurality of crushing blades 108, two groups of scraper assemblies, a discharge assembly, a power assembly and an air supply assembly, wherein the furnace body 102 is arranged on the support 101, the furnace body 102 has a feed inlet 132 and a smoke exhaust port 133, the stepped stacked grate 103 is arranged on the furnace body 102, the first and second stages of the stepped stacked grate 103 are drying grates 134, the third and fourth stages of the stepped stacked grate 103 are combustion grates 135, and the stepped stacked grate 103 is a heat treatment furnace. The fifth stage of 03 is a burning ember discharge grate 136, the air supply pipe 104 is rotatably connected to the stepped stacked grate 103, and the air supply pipe 104 is connected to the furnace body 102 through a detachable support ring 138 and a circumferential bearing 139, the two connecting pipes 105 are both connected to the air supply pipe 104, a plurality of branch air pipes 106 are respectively connected to the corresponding connecting pipes 105, a plurality of pushing shovels 107 are respectively connected to the corresponding branch air pipes 106, a plurality of crushing blades 108 are all connected to the stepped stacked grate 103, and the pushing shovel 107 is provided with a crushing groove 131 adapted to the corresponding crushing blade 108, and the power assembly is used to drive the air supply pipe 104 to rotate; The scraper assembly includes a mounting plate 109, an axial scraper shovel 110, an axial spring 111 and a guide column 112. The mounting plate 109 is fixedly connected to the corresponding air distribution pipe 106. One end of the guide column 112 is fixedly connected to the mounting plate 109. The other end of the guide column 112 is slidably connected to the axial scraper shovel 110. Both ends of the axial spring 111 are fixedly connected to the mounting plate 109 and the axial scraper shovel 110 respectively. The axial scraper shovel 110 is in contact with the ember discharge grate 136. The air supply assembly is connected to the air supply pipe 104 via an axial thrust bearing 137. The scraper assembly further includes a circumferential scraper shovel 113 and a circumferential spring 114 . The circumferential scraper shovel 113 is slidably connected to the axial scraper shovel 110 , and two ends of the circumferential spring 114 are fixedly connected to the axial scraper shovel 110 and the circumferential scraper shovel 113 , respectively.

[0024] With respect to this specific embodiment, during specific use, the garbage to be processed enters the furnace body 102 through the feed port 132, falls onto the stepped stacked grate 103, and is dried by the drying grate 134. At the same time, the power assembly is started, and the power assembly drives the air supply pipe 104 to rotate, and the air supply pipe 104 drives the two connecting pipes 105 to rotate, and the two connecting pipes 105 drive the multiple air branch pipes 106 to rotate, and the multiple air branch pipes 106 drive the multiple pushing shovels 107 to make circular motions, and the pushing shovels 107 on the drying grate 134 push the waste on the drying grate 134 to move. In this process, the crushing blade 108 passes through the crushing groove 131, and the agglomerated waste is broken up and divided by the action of the crushing blade 108 and the pushing shovel 107, so that the larger waste can be broken up, and the broken waste is pushed onto the pushing shovel 10 7 falls onto the combustion grate 135 for combustion. During combustion, the push shovel 107 on the combustion grate 135 rotates to drive the waste on the combustion grate 135 to move, so that the waste can be further broken up and divided, so that the combustion is more complete. After the combustion is completed, the push shovel 107 on the combustion grate 135 drops the ash onto the ember discharge grate 136. At this time, the corresponding air distribution pipe 106 will drive the installation The plate 109 moves, and the mounting plate 109 drives the axial scraper 110 to move to scrape off the ash on the ember discharge grate 136, and the axial spring 111 makes the axial scraper 110 always abut against the ember discharge grate 136, thereby improving the scraping effect of the axial scraper 110 on the ember discharge grate 136, and the guide column 112 can prevent the axial scraper 110 from rotating axially; Furthermore, when the mounting plate 109 moves, the circumferential scraper 113 is driven to rotate by the axial scraper 110, so that the circumferential scraper 113 scrapes off the ash on the side wall between the combustion grate 135 and the ember discharge grate 136, further improving the discharge effect; This solves the technical problem that the pyrolysis gasification furnace used for garbage incineration in the prior art has poor stirring, crushing and mixing effects during use, and the ash slag easily agglomerates and sticks to the grate when discharging after combustion, resulting in failure to discharge normally.

[0025] Each of the air distribution pipes 106 is provided with at least two first air supply holes 115; Three discharge chutes 116 are provided on each step edge of the drying grate 134 and the combustion grate 135 , and the depths of the three discharge chutes 116 gradually increase along the rotation direction of the air supply pipe 104 .

[0026] With respect to this specific embodiment, when in use, the air supply assembly delivers the combustion gas to the plurality of air distribution pipes 106 through the air supply pipe 104 and the two connecting pipes 105, and discharges the combustion gas through the plurality of the first air supply holes 115 to contact the material, thereby promoting a thorough reaction of the combustible smoke; By arranging three discharge chutes 116 at each step edge of the drying grate 134 and the combustion grate 135, step-by-step discharge is achieved through the three discharge chutes 116 to ensure full reaction.

[0027] Secondly, the power assembly includes a reduction motor 117 and a gear transmission unit 118 . The reduction motor 117 is installed on the furnace body 102 . The output end of the reduction motor 117 is connected to the air supply pipe 104 through the gear transmission unit 118 .

[0028] According to this specific implementation, by starting the reduction motor 117 , the reduction motor 117 drives the air supply pipe 104 to rotate through the gear transmission unit 118 .

[0029] At the same time, the unloading assembly includes a discharge trough 119, a slag discharge cylinder 120, a guide limit clamp 121, a slag discharge arc plug plate 122 and a wear-resistant sealing ring 123. The discharge trough 119 is arranged on the furnace body 102, the slag discharge cylinder 120 and the guide limit clamp 121 are both installed on the furnace body 102, the output end of the slag discharge cylinder 120 is fixedly connected to the slag discharge arc plug plate 122, and the slag discharge arc plug plate 122 is slidingly sealed with the furnace body 102 through the wear-resistant sealing ring 123.

[0030] According to the present specific embodiment, the ash and slag are scraped off by the scraper assembly and fall into the discharge trough 119 . The slag discharge cylinder 120 is started, and the slag discharge cylinder 120 drives the slag discharge arc-shaped insert plate 122 to move, thereby realizing the ash and slag discharge.

[0031] In addition, the air supply assembly includes a first fan 124 and an air supply pipe 125 . The air supply pipe 125 is connected to the air supply pipe 104 via an axial thrust bearing 137 . The first fan 124 is used to supply air to the air supply pipe 125 .

[0032] According to this specific embodiment, the first fan 124 delivers the combustion gas to the gas supply pipe 104 through the gas delivery pipe 125 .

[0033] Again, the miniaturized rake-type multi-stage air supply pyrolysis gasification furnace also includes a second fan 126 and an air inlet pipe 127. The air inlet pipe 127 is connected to the stepped stacked grate 103. The second fan 126 is used to connect the air inlet pipe 127. The stepped stacked grate 103 is provided with a plurality of second air supply holes 128.

[0034] According to this specific embodiment, the hot air is input into the air inlet pipe 127 through the second fan 126, and then the hot air is blown out through the second air supply hole 128, so that the hot air can be blown to the bottom of the waste, further improving the incineration efficiency.

[0035] Finally, the miniaturized rake-type multi-stage air supply pyrolysis gasification furnace also includes a material breaking cone 129 and a material spreading umbrella 130 . The material spreading umbrella 130 is fixedly connected to the air supply pipe 104 . The material breaking cone 129 is fixedly connected to the material spreading umbrella 130 and is located above the material spreading umbrella 130 .

[0036] According to this specific embodiment, the waste input through the feed port 132 first falls on the crushing cone 129, and is preliminarily crushed by the crushing cone 129. Then the waste falls on the scattering umbrella, and the scattering umbrella 130 is driven to rotate by the driving component, so that the scattering umbrella 130 evenly scatters the crushed waste to the top layer of the stepped stacked grate 103, so that the waste distribution is more even, thereby improving the incineration efficiency.

[0037] When using a miniaturized rake-type multi-stage air supply pyrolysis gasification furnace of the present invention, the garbage to be processed enters the furnace body 102 through the feed port 132, falls to the stepped stacked grate 103, and is dried by the drying grate 134. At the same time, the power assembly is started, the power assembly drives the air supply pipe 104 to rotate, the air supply pipe 104 drives the two connecting pipes 105 to rotate, the two connecting pipes 105 drive the multiple air branch pipes 106 to rotate, the multiple air branch pipes 106 drive the multiple pushing shovels 107 to make circular motions, the pushing shovels 107 on the drying grate 134 push the waste on the drying grate 134 to move, and in this process, the crushing blade 108 passes through the crushing groove 131, and the agglomerated waste is broken up and divided by the action of the crushing blade 108 and the pushing shovel 107, so that the larger waste can be broken up, and the broken waste is The ash is dropped onto the combustion grate 135 by the push shovel 107 for combustion. During combustion, the push shovel 107 on the combustion grate 135 rotates to drive the waste on the combustion grate 135 to move, so that the waste can be further broken up and divided, so that the combustion is more complete. After the combustion is completed, the push shovel 107 on the combustion grate 135 drops the ash onto the ember discharge grate 136. At this time, the corresponding air distribution pipe 106 will drive the The mounting plate 109 moves, and the mounting plate 109 drives the axial scraper 110 to move to scrape off the ash on the ember discharge grate 136, and the axial spring 111 makes the axial scraper 110 always abut against the ember discharge grate 136, thereby improving the scraping effect of the axial scraper 110 on the ember discharge grate 136, and the guide column 112 can prevent the axial scraper 110 from rotating axially; Furthermore, when the mounting plate 109 moves, the circumferential scraper 113 is driven to rotate by the axial scraper 110, so that the circumferential scraper 113 scrapes off the ash on the side wall between the combustion grate 135 and the ember discharge grate 136, further improving the discharge effect; This solves the technical problem that the pyrolysis gasification furnace used for garbage incineration in the prior art has poor stirring, crushing and mixing effects during use, and the ash slag easily agglomerates and sticks to the grate when discharging after combustion, resulting in failure to discharge normally.

[0038] What is disclosed above is only a preferred embodiment of the present invention, and it certainly cannot be used to limit the scope of rights of the present invention. Ordinary technicians in this field can understand that all or part of the processes of the above embodiment and equivalent changes made according to the claims of the present invention still fall within the scope of the invention.

Claims

1. A miniaturized rake-type multi-stage air supply pyrolysis gasification furnace, characterized in that: The invention comprises a support, a furnace body, a stepped stacked grate, an air supply pipe, two connecting pipes, a plurality of air distribution pipes, a plurality of pusher shovels, a plurality of crushing blades, two groups of scraper assemblies, a discharge assembly, a power assembly and an air supply assembly. The furnace body is arranged on the support. The furnace body has a feed port and a smoke exhaust port. The stepped stacked grate is arranged on the furnace body. The first and second levels of the stepped stacked grate are drying grates. The third and fourth levels of the stepped stacked grate are combustion grates. The fifth level of the stepped stacked grate is a burnout discharge grate. , the air supply pipe is rotatably connected to the stepped stacked grate, and the air supply pipe is connected to the furnace body through a detachable support ring and a circumferential bearing, the two connecting pipes are both connected to the air supply pipe, a plurality of branch air pipes are respectively connected to the corresponding connecting pipes, a plurality of pusher shovels are respectively connected to the corresponding branch air pipes, a plurality of crushing blades are connected to the stepped stacked grate, and a crushing groove adapted to the corresponding crushing blade is provided on the pusher shovel, and the power assembly is used to drive the air supply pipe to rotate; The scraper assembly includes a mounting plate, an axial scraper shovel, an axial spring and a guide column. The mounting plate is fixedly connected to the corresponding air distribution pipe, one end of the guide column is fixedly connected to the mounting plate, and the other end of the guide column is slidably connected to the axial scraper shovel. Both ends of the axial spring are respectively fixedly connected to the mounting plate and the axial scraper shovel. The axial scraper shovel is in contact with the burnout discharge grate, and the air supply assembly is connected to the air supply pipe through an axial thrust bearing.

2. The miniaturized rake-type multi-stage air supply pyrolysis gasification furnace according to claim 1, characterized in that: The scraper assembly also includes a circumferential scraper shovel and a circumferential spring. The circumferential scraper shovel is slidably connected to the axial scraper shovel, and two ends of the circumferential spring are fixedly connected to the axial scraper shovel and the circumferential scraper shovel respectively.

3. The miniaturized rake-type multi-stage air supply pyrolysis gasification furnace according to claim 2, characterized in that: Each of the air distribution pipes is provided with at least two first air supply holes; Each step edge of the drying grate and the combustion grate is provided with three discharge troughs, and the depths of the three discharge troughs gradually increase along the rotation direction of the air supply pipe.

4. The miniaturized rake-type multi-stage air supply pyrolysis gasification furnace according to claim 3, characterized in that: The power assembly includes a reduction motor and a gear transmission unit. The reduction motor is mounted on the furnace body, and the output end of the reduction motor is connected to the air supply pipe through the gear transmission unit.

5. The miniaturized rake-type multi-stage air supply pyrolysis gasification furnace according to claim 4, characterized in that: The discharge assembly includes a discharge chute, a slag discharge cylinder, a guide limit clamp, a slag discharge arc plug plate and a wear-resistant sealing ring. The discharge chute is arranged on the furnace body. The slag discharge cylinder and the guide limit clamp plate are both installed on the furnace body. The output end of the slag discharge cylinder is fixedly connected to the slag discharge arc plug plate, and the slag discharge arc plug plate is slidably sealed with the furnace body through the wear-resistant sealing ring.

6. The miniaturized rake-type multi-stage air supply pyrolysis gasification furnace according to claim 5, characterized in that: The air supply assembly includes a first fan and an air supply pipe, the air supply pipe is connected to the air supply pipe through an axial thrust bearing, and the first fan is used to supply air to the air supply pipe.

7. The miniaturized rake-type multi-stage air supply pyrolysis gasification furnace according to claim 6, characterized in that: The miniaturized rake-type multi-stage air supply pyrolysis gasification furnace also includes a second fan and an air inlet pipe, the air inlet pipe is connected to the stepped stacked grate, the second fan is used to connect to the air inlet pipe, and the stepped stacked grate is provided with a plurality of second air supply holes.

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