Small concave-convex combined hearth and grate type pyrolysis gasification furnace

Abstract

The invention relates to the technical field of pyrolysis and gasification furnaces, in particular to a small concave-convex combined hearth and grate type pyrolysis and gasification furnace which comprises a furnace body, a furnace cover, a feeding hopper and a crushing and sprinkling mechanism, the crushing and sprinkling mechanism comprises a support, a gear motor, a driving shaft, a bearing set and a sprinkling and crushing cone, and garbage to be pyrolyzed and gasified enters the furnace body through a feeding port; the garbage falls on the upper surface of the sprinkling crushing cone after being guided by the feeding hopper, the speed reducing motor is started, and the sprinkling crushing cone is driven to rotate through the driving shaft, so that the garbage is subjected to centrifugal movement on the sprinkling crushing cone, and the garbage is crushed and scattered after sequentially passing through the first crushing assembly, the second crushing assembly and the third crushing assembly; and materials are uniformly sprayed in the furnace body, so that the thickness distribution of a garbage material layer is more uniform, incineration is facilitated, the phenomenon that the material layer is burnt through or smoldering is caused due to uneven thickness is prevented, and the pyrolysis gasification treatment effect on the garbage is improved.

Description

Technical Field

[0001] The invention relates to the technical field of pyrolysis gasification furnaces, and in particular to a small-sized concave-convex combined hearth and grate-type pyrolysis gasification furnace. Background Art

[0002] Pyrolysis gasification furnace is a kind of treatment equipment that uses pyrolysis gasification technology to treat garbage. Garbage pyrolysis gasification refers to the process in which the macromolecules of organic components in garbage break under oxygen-free or oxygen-deficient conditions to produce molecular gas, tar and residue. Vertical pyrolysis gasification furnace is a garbage treatment equipment that is installed vertically and its drying, pyrolysis, gasification, combustion and burning are arranged from top to bottom. Garbage pyrolysis gasification technology not only realizes the harmlessness, reduction and resource utilization of garbage, but also effectively overcomes the dioxin pollution problem caused by garbage incineration, thus becoming a garbage treatment technology with great development prospects.

[0003] However, in the actual operation of existing garbage pyrolysis gasification furnaces, if the thickness of the material layer in the furnace is unevenly distributed, it is easy to cause the material layer to burn through (the material layer is too thin, and there is excessive oxygen) or smolder (the material layer is too thick, and there is insufficient oxygen supply), which is not conducive to the complete decomposition of harmful substances and results in less than ideal material treatment effects. Summary of the invention

[0004] The purpose of the present invention is to provide a small concave-convex combined hearth and grate-type pyrolysis gasification furnace to solve the problem that in the actual use of the garbage pyrolysis gasification furnace in the prior art, if the thickness of the material layer in the furnace is unevenly distributed, it is easy to cause the material layer to burn through or smolder, which is not conducive to the complete decomposition of harmful substances and leads to unsatisfactory garbage treatment effect.

[0005] To achieve the above-mentioned purpose, the present invention provides a small concave-convex combined hearth and grate type pyrolysis gasification furnace, the small concave-convex combined hearth and grate type pyrolysis gasification furnace comprising a furnace body, a furnace cover, a feed hopper and a crushing and sprinkling mechanism, the furnace cover is installed at the top of the furnace body, smoke exhaust pipes are arranged on both sides of the furnace cover, the feed hopper is installed at the top of the furnace cover through a support, the top of the feed hopper is provided with a feed inlet, and the crushing and sprinkling mechanism is also arranged at the center of the feed hopper; The crushing and sprinkling mechanism includes a bracket, a reduction motor, a driving shaft, a bearing group and a sprinkling and crushing cone. The bracket is installed at the top of the feed hopper, the bearing group is arranged at the center of the upper surface of the feed hopper, the reduction motor is installed on the bracket, the driving shaft is arranged at the output end of the reduction motor, the driving shaft passes through the bearing group and the top of the feed hopper in sequence, the sprinkling and crushing cone is arranged at one end of the driving shaft located at the top of the furnace body, and the first crushing assembly, the second crushing assembly and the third crushing assembly are arranged in sequence on the outer side wall of the sprinkling and crushing cone.

[0006] The first crushing assembly is composed of three first crushing pieces, which are evenly installed on the outer side wall of the material-sprinkling crushing cone and are arranged around the outside of the center of the material-sprinkling crushing cone. Each of the first crushing pieces is provided with a first-level auxiliary crushing blade on a side away from the material-sprinkling crushing cone, and each of the first crushing pieces is provided with a first-level main crushing blade at the end thereof. The second crushing assembly is composed of three second crushing pieces, which are evenly installed on the outer side wall of the material-sprinkling crushing cone, and each of the second crushing pieces is respectively located on one side of one of the first crushing pieces away from the center of the material-sprinkling crushing cone, and each of the second crushing pieces is away from the One side of the sprinkling crushing cone is provided with a secondary auxiliary crushing blade, and the end of each of the second crushing pieces is provided with a secondary main crushing blade. The third crushing assembly is composed of three third crushing pieces, and the three third crushing pieces are evenly installed on the outer side wall of the sprinkling crushing cone. Each of the third crushing pieces is located on the side of one of the second crushing pieces away from the corresponding first crushing piece, and each of the third crushing pieces is provided with a tertiary auxiliary crushing blade on the side away from the sprinkling crushing cone, and the end of each of the third crushing pieces is provided with a tertiary main crushing blade. The first crushing piece, the second crushing piece and the third crushing piece are arranged on the outer side wall of the sprinkling crushing cone in a step-by-step manner.

[0007] In which, the furnace body is arranged in a regular hexagonal structure, and a sliding mounting surface is arranged on each surface of the outer wall of the furnace body, and the sliding mounting surface is located in the combustion section of the furnace body. A mechanical grate group is arranged on each sliding mounting surface, and a conical sliding protrusion is arranged between each two adjacent sliding mounting surfaces located at one end inside the furnace body, and each of the conical sliding protrusions is composed of two lateral sliding surfaces.

[0008] Among them, each of the mechanical grate groups includes a first pushing hydraulic cylinder, a mounting frame, a fixed grate, a driving hydraulic cylinder and a movable grate. The mounting frame is slidably mounted on the sliding mounting surface by rollers. The first pushing hydraulic cylinder is arranged at one end of the sliding mounting surface located outside the furnace body. The output end of the first pushing hydraulic cylinder is connected to the mounting frame. The fixed grate is fixedly arranged on the mounting frame. The movable grate is also slidably arranged on the mounting frame. The driving hydraulic cylinder is also fixedly arranged on the mounting frame. The driving hydraulic cylinder is used to push the movable grate.

[0009] Among them, the interior of the furnace body is also provided with a fixed frame grate and a movable frame grate, the fixed frame grate is located in the burning section of the furnace body, the movable frame grate is arranged above the fixed frame grate, and a second pushing hydraulic cylinder is arranged on the outer wall of the furnace body, and the output end of the second pushing hydraulic cylinder is connected to one end of the movable frame grate extending to the outside of the furnace body.

[0010] Among them, air inlets are arranged on both sides of the middle part of the furnace body, multiple first air holes are arranged on each of the lateral sliding surfaces, multiple second air holes are arranged on the sprinkling and crushing cone, and secondary air conveying pipes and slag outlets are respectively installed on both sides of the bottom of the furnace body.

[0011] Wherein, a pushing spiral blade is also arranged on the outer side wall of the driving shaft, and the pushing spiral blade is arranged inside the feeding hopper.

[0012] The invention discloses a small-sized concave-convex combined hearth and grate-type pyrolysis and gasification furnace, comprising a furnace body, a furnace cover, a feeding hopper and a crushing and sprinkling mechanism, wherein the crushing and sprinkling mechanism comprises a bracket, a reduction motor, a driving shaft, a bearing group and a sprinkling and crushing cone, wherein the garbage to be pyrolyzed and gasified enters the furnace body through the feeding port, and after being guided by the feeding hopper, falls on the upper surface of the sprinkling and crushing cone, and the reduction motor is started to drive the sprinkling and crushing cone to rotate through the driving shaft, so that the garbage is subjected to centrifugal motion on the sprinkling and crushing cone, and the garbage is crushed and scattered after passing through the first crushing component, the second crushing component and the third crushing component in turn, and is evenly sprinkled in the furnace body, and respectively passes through the pyrolysis and gasification and combustion sections in the furnace body, so that the thickness distribution of the garbage material layer is more even, which is conducive to incineration, and prevents the phenomenon of burning through the material layer or smoldering due to uneven thickness, thereby improving the pyrolysis and gasification treatment effect of the garbage. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] 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.

[0014] Figure 1 It is a structural schematic diagram of a small concave-convex combined hearth and grate-type pyrolysis gasification furnace provided by the present invention.

[0015] Figure 2 The present invention provides Figure 1 A magnified view of the local structure at A.

[0016] Figure 3 The present invention provides Figure 1 A magnified view of the local structure at B.

[0017] Figure 4 It is a structural schematic diagram of the material-sprinkling crushing cone provided by the present invention.

[0018] Figure 5 It is a side view of the material-sprinkling crushing cone provided by the present invention.

[0019] Figure 6 It is a schematic diagram of the external structure of the furnace body provided by the present invention.

[0020] Figure 7 It is a schematic diagram of the cross-sectional structure of the furnace body provided by the present invention.

[0021] Figure 8 It is a top view of the furnace body provided by the present invention.

[0022] 101-furnace body, 102-furnace cover, 103-feeding hopper, 104-exhaust pipe, 105-pillar, 106-feeding port, 107-bracket, 108-reduction motor, 109-drive shaft, 110-bearing group, 111-sprinkling crushing cone, 112-first crushing piece, 113-first-level auxiliary crushing blade, 114-first-level main crushing blade, 115-second crushing piece, 116-second-level auxiliary crushing blade, 117-second-level main crushing blade, 118-third crushing piece, 119-third-level auxiliary crushing blade, 120-third-level main crushing blade, 121-sliding mounting surface, 122-mechanical grate group, 123 -lateral sliding surface, 124-first pushing hydraulic cylinder, 125-mounting frame, 126-fixed grate, 127-driving hydraulic cylinder, 128-movable grate, 129-roller, 130-fixed frame grate, 131-movable frame grate, 132-second pushing hydraulic cylinder, 133-air inlet, 134-first air vent, 135-second air vent, 136-secondary air conveying pipe, 137-slag outlet, 138-pushing spiral fan blade, 139-mounting seat, 140-axial bearing, 141-support ring, 142-circumferential bearing, 143-sealing cover, 144-grate clamping mechanism. DETAILED DESCRIPTION

[0023] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0024] See also Figures 1 to 8 ,in Figure 1 It is a structural diagram of a small concave-convex combined hearth and grate-type pyrolysis gasification furnace. Figure 2 yes Figure 1 The enlarged view of the local structure at A. Figure 3 yes Figure 1 The enlarged view of the local structure at B, Figure 4 This is a schematic diagram of the structure of the sprinkler crushing cone. Figure 5 This is a side view of the sprinkler crushing cone. Figure 6 This is a schematic diagram of the external structure of the furnace. Figure 7 It is a schematic diagram of the cross-sectional structure of the furnace body. Figure 8 It is a top view of the furnace body.

[0025] The present invention provides a small concave-convex combined hearth and grate type pyrolysis gasification furnace, comprising a furnace body 101, a furnace cover 102, a feed hopper 103 and a crushing and sprinkling mechanism, wherein the furnace cover 102 is installed at the top of the furnace body 101, smoke exhaust pipes 104 are arranged on both sides of the furnace cover 102, the feed hopper 103 is installed at the top of the furnace cover 102 through a support 105, a feed inlet 106 is arranged at the top of the feed hopper 103, and the crushing and sprinkling mechanism is also arranged at the center of the feed hopper 103; The crushing and sprinkling mechanism includes a bracket 107, a reduction motor 108, a drive shaft 109, a bearing group 110 and a sprinkling and crushing cone 111. The bracket 107 is installed at the top of the feed hopper 103. The bearing group 110 is arranged at the center of the upper surface of the feed hopper 103. The reduction motor 108 is installed on the bracket 107. The drive shaft 109 is arranged at the output end of the reduction motor 108. The drive shaft 109 passes through the bearing group 110 and the top of the feed hopper 103 in sequence. The end of the drive shaft 109 located at the top of the furnace body 101 is provided with the sprinkling and crushing cone 111. The first crushing assembly, the second crushing assembly and the third crushing assembly are arranged in sequence on the outer wall of the sprinkling and crushing cone 111.

[0026] With respect to this specific embodiment, during specific use, the garbage to be pyrolyzed and gasified enters the furnace body 101 through the feed port 106, and after being guided by the feed hopper 103, falls on the upper surface of the sprinkling and crushing cone 111, and the reduction motor 108 is started, and the sprinkling and crushing cone 111 is driven to rotate through the drive shaft 109, so that the garbage is subjected to centrifugal motion on the sprinkling and crushing cone 111. After the garbage passes through the first crushing component, the second crushing component and the third crushing component in turn, it is crushed and scattered, and evenly sprinkled in the furnace body, so that the thickness distribution of the garbage material layer is more even, which is conducive to incineration, prevents the phenomenon of burning through the material layer or smoldering due to uneven thickness, and improves the pyrolysis and gasification treatment effect of the garbage.

[0027] Furthermore, the first crushing component is composed of three first crushing pieces 112, which are evenly installed on the outer side wall of the sprinkler crushing cone 111 and are arranged around the outside of the center of the sprinkler crushing cone 111. Each of the first crushing pieces 112 is provided with a first-level auxiliary crushing blade 113 on a side away from the sprinkler crushing cone 111, and each of the first crushing pieces 112 is provided with a first-level main crushing blade 114 at the end. The second crushing component is composed of three second crushing pieces 115, which are evenly installed on the outer side wall of the sprinkler crushing cone 111, and each of the second crushing pieces 115 is respectively located on one side of one of the first crushing pieces 112 away from the center of the sprinkler crushing cone 111, and each of the second crushing pieces 115 is away from the sprinkler crushing A secondary auxiliary crushing blade 116 is provided on one side of the cone 111, and a secondary main crushing blade 117 is provided at the end of each of the second crushing pieces 115. The third crushing assembly is composed of three third crushing pieces 118, and the three third crushing pieces 118 are evenly installed on the outer wall of the sprinkling crushing cone 111. Each of the third crushing pieces 118 is located on the side of one of the second crushing pieces 115 away from the corresponding first crushing piece 112. A tertiary auxiliary crushing blade 119 is provided on the side of each of the third crushing pieces 118 away from the sprinkling crushing cone 111, and a tertiary main crushing blade 120 is provided at the end of each of the third crushing pieces 118. The first crushing piece 112, the second crushing piece 115 and the third crushing piece 118 are arranged to be shorter in step on the outer wall of the sprinkling crushing cone 111.

[0028] According to the present specific embodiment, since each of the first-level main crushing blades 114, each of the second-level main crushing blades 117 and each of the third-level main crushing blades 120 are arranged in the counterclockwise rotation direction of the material-sprinkling crushing cone 111, when the garbage is scattered on the material-sprinkling crushing cone 111, and is fully crushed by the first-level main crushing blade 114, the first-level auxiliary crushing blade 113, the second-level main crushing blade 117, the second-level auxiliary crushing blade 116, the third-level main crushing blade 120 and the third-level auxiliary crushing blade 119 in sequence, it is evenly distributed in the furnace body 101 under the action of the centrifugal force generated when the material-sprinkling crushing cone 111 rotates, and since the first crushing piece 112, the second crushing piece 115 and the third crushing piece 118 are arranged to be shorter step by step, the first-level main crushing blade 114, the second-level main crushing blade 117 and the third-level main crushing blade 120 arranged along the counterclockwise rotation direction are also arranged in a gradually shorter structure, which is beneficial to the centrifugal crushing and distribution of the garbage.

[0029] Furthermore, the furnace body 101 is arranged in a regular hexagonal structure, and a sliding mounting surface 121 is arranged on each surface of the outer wall of the furnace body 101, and the sliding mounting surface 121 is located in the combustion section of the furnace body 101. A mechanical grate group 122 is arranged on each sliding mounting surface 121, and a conical sliding protrusion is arranged between one end of each adjacent two sliding mounting surfaces 121 located inside the furnace body 101, and each of the conical sliding protrusions is composed of two lateral sliding surfaces 123.

[0030] According to this specific embodiment, the installation of the mechanical grate group 122 is completed by setting the sliding installation surface 121, and the load and pressure of the mechanical grate group 122 are relieved by setting the lateral sliding surface 123, and the reaction waste accumulation surface is increased.

[0031] Furthermore, each of the mechanical grate groups 122 includes a first pushing hydraulic cylinder 124, a mounting frame 125, a fixed grate 126, a driving hydraulic cylinder 127 and a movable grate 128. The mounting frame 125 is slidably mounted on the sliding mounting surface 121 through a roller 129. The sliding mounting surface 121 is located at one end outside the furnace body 101 and is provided with the first pushing hydraulic cylinder 124. The output end of the first pushing hydraulic cylinder 124 is connected to the mounting frame 125. The fixed grate 126 is fixedly mounted on the mounting frame 125. The movable grate 128 is also slidably mounted on the mounting frame 125. The driving hydraulic cylinder 127 is also fixedly mounted on the mounting frame 125. The driving hydraulic cylinder 127 is used to push the movable grate.

[0032] According to this specific embodiment, the installation and positioning of the mechanical grate group 122 are realized through the setting of the first pushing hydraulic cylinder 124, and the installation and maintenance of the mechanical grate group 122 are facilitated through the modular setting, and the reciprocating movement of the movable grate 128 is realized through the setting of the driving hydraulic cylinder 127, completing the step-by-step forward pushing of the material.

[0033] Furthermore, a fixed frame grate 130 and a movable frame grate 131 are also provided inside the furnace body 101. The fixed frame grate 130 is located in the burning section of the furnace body 101, and the movable frame grate 131 is provided above the fixed frame grate 130. A second pushing hydraulic cylinder 132 is provided on the outer wall of the furnace body 101, and the output end of the second pushing hydraulic cylinder 132 is connected to one end of the movable frame grate 131 extending to the outside of the furnace body 101.

[0034] According to this specific embodiment, the movable frame grate 131 moves forward and backward under the push of the second pushing hydraulic cylinder 132, thereby changing the staggered gap between the movable frame grate 131 and the fixed frame grate 130, increasing the gap to realize the unloading of reaction garbage, and the movable frame grate 131 rubs back and forth on the fixed frame grate 130, which can prevent the garbage ash from slagging on the fixed frame grate 130 and avoid clogging the grate slag leakage gap, thereby enhancing the reliability and durability of the entire mechanism.

[0035] Furthermore, three air inlets 133 are arranged around the furnace body 101, a plurality of first air holes 134 are arranged on each of the lateral sliding surfaces 123, a plurality of second air holes 135 are arranged on the sprinkling and crushing cone 111, and a secondary air conveying pipe 136 and a slag outlet 137 are respectively installed on both sides of the bottom of the furnace body 101.

[0036] With respect to this specific embodiment, by setting the air inlet 133, the first air hole 134 and the secondary air duct 136, gas exchange is performed between the interior of the furnace body 101 and the outside, which helps to maintain the freshness and fluidity of the gas in the furnace, prevent the accumulation of harmful gases in the furnace, and maintain the stability of the internal gas flow of the furnace body 101, thereby reducing the unstable combustion phenomenon caused by poor airflow. By setting the second air hole 135, the air permeability of the material on the conical surface of the sprinkler and crushing cone 111 is enhanced, thereby promoting the drying reaction.

[0037] Furthermore, a pushing spiral blade 138 is also provided on the outer side wall of the driving shaft 109 , and the pushing spiral blade 138 is arranged inside the feeding hopper 103 .

[0038] According to this specific embodiment, the pushing spiral blades 138 are provided to facilitate the transportation of the material in the feed hopper 103 to the furnace body 101 , and to avoid the material from being blocked or bridging in the feed hopper 103 , thereby ensuring the stability of the equipment operation.

[0039] Furthermore, the bearing group 110 includes a mounting seat 139, an axial bearing 140, a support ring 141 and a circumferential bearing 142. The mounting seat 139 is arranged at the center of the upper surface of the feed hopper 103. The interior of the mounting seat 139 is sequentially provided with the axial bearing 140, the support ring 141 and the circumferential bearing 142 from bottom to top. The axial bearing 140, the support ring 141 and the circumferential bearing 142 are all arranged on the outside of the drive shaft 109.

[0040] According to this specific embodiment, by providing the axial bearing 140 , the support ring 141 and the circumferential bearing 142 , the structure of the drive shaft 109 is more stable when it rotates, and the rotation of the drive shaft 109 is smoother.

[0041] Furthermore, a plurality of sealing covers 143 are provided on the outer wall of the furnace body 101 , and a sealing cover 143 is provided outside each of the sliding mounting surfaces 121 , and each of the sealing covers 143 is respectively provided outside the corresponding mechanical grate group 122 .

[0042] According to this specific embodiment, the mechanical grate group 122 is sealed by providing the sealing cover 143 .

[0043] Furthermore, a plurality of grate pressing mechanisms 144 are disposed on the outer side wall of the furnace body 101 , and each of the grate pressing mechanisms 144 corresponds to one of the mechanical grate groups 122 .

[0044] According to this specific embodiment, the movable grate 128 on the mechanical grate group 122 is compressed by the provision of the grate compression mechanism 144 .

[0045] 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 small concave-convex combined hearth and grate type pyrolysis gasification furnace, characterized in that: It includes a furnace body, a furnace cover, a feed hopper and a crushing and sprinkling mechanism. The furnace cover is installed on the top of the furnace body, smoke exhaust pipes are arranged on both sides of the furnace cover, the feed hopper is installed on the top of the furnace cover through a support, a feed inlet is arranged on the top of the feed hopper, and the crushing and sprinkling mechanism is also arranged at the center of the feed hopper; The crushing and sprinkling mechanism includes a bracket, a reduction motor, a driving shaft, a bearing group and a sprinkling and crushing cone. The bracket is installed at the top of the feed hopper, the bearing group is arranged at the center of the upper surface of the feed hopper, the reduction motor is installed on the bracket, the driving shaft is arranged at the output end of the reduction motor, the driving shaft passes through the bearing group and the top of the feed hopper in sequence, the sprinkling and crushing cone is arranged at one end of the driving shaft located at the top of the furnace body, and the first crushing assembly, the second crushing assembly and the third crushing assembly are arranged in sequence on the outer side wall of the sprinkling and crushing cone.

2. The small concave-convex combined hearth and grate type pyrolysis gasification furnace according to claim 1, characterized in that: The first crushing assembly is composed of three first crushing pieces, which are evenly installed on the outer side wall of the material sprinkling crushing cone and are arranged around the outside of the center of the material sprinkling crushing cone. Each of the first crushing pieces is provided with a first-level auxiliary crushing blade on a side away from the material sprinkling crushing cone, and each of the first crushing pieces is provided with a first-level main crushing blade at the end. The second crushing assembly is composed of three second crushing pieces, which are evenly installed on the outer side wall of the material sprinkling crushing cone. Each of the second crushing pieces is respectively located on one side of one of the first crushing pieces away from the center of the material sprinkling crushing cone, and each of the second crushing pieces is away from the material sprinkling crushing cone. A secondary auxiliary crushing blade is provided on one side of the crushing cone, and a secondary main crushing blade is provided on the end of each of the second crushing pieces. The third crushing assembly is composed of three third crushing pieces, and the three third crushing pieces are evenly installed on the outer side wall of the sprinkling crushing cone. Each of the third crushing pieces is located on a side of one of the second crushing pieces away from the corresponding first crushing piece, and a third auxiliary crushing blade is provided on a side of each of the third crushing pieces away from the sprinkling crushing cone, and a third main crushing blade is provided on the end of each of the third crushing pieces. The first crushing piece, the second crushing piece and the third crushing piece are arranged to be successively shorter on the outer side wall of the sprinkling crushing cone.

3. The small concave-convex combined hearth and grate type pyrolysis gasification furnace according to claim 2, characterized in that: The furnace body is arranged in a regular hexagonal structure, and each surface of the outer wall of the furnace body is provided with a sliding mounting surface, and the sliding mounting surface is located in the combustion section of the furnace body. A mechanical grate group is arranged on each sliding mounting surface, and a conical sliding protrusion is arranged between each two adjacent sliding mounting surfaces located at one end inside the furnace body, and each of the conical sliding protrusions is composed of two lateral sliding surfaces.

4. The small concave-convex combined hearth and grate type pyrolysis gasification furnace according to claim 3, characterized in that: Each of the mechanical grate groups includes a first pushing hydraulic cylinder, a mounting frame, a fixed grate, a driving hydraulic cylinder and a movable grate. The mounting frame is slidably mounted on the sliding mounting surface by rollers. The first pushing hydraulic cylinder is arranged at one end of the sliding mounting surface located outside the furnace body. The output end of the first pushing hydraulic cylinder is connected to the mounting frame. The fixed grate is fixedly arranged on the mounting frame. The movable grate is also slidably arranged on the mounting frame. The driving hydraulic cylinder is also fixedly arranged on the mounting frame. The driving hydraulic cylinder is used to push the movable grate.

5. The small concave-convex combined hearth and grate type pyrolysis gasification furnace according to claim 4, characterized in that: A fixed frame grate and a movable frame grate are also provided inside the furnace body. The fixed frame grate is located in the burning section of the furnace body, and the movable frame grate is provided above the fixed frame grate. A second pushing hydraulic cylinder is provided on the outer side wall of the furnace body, and the output end of the second pushing hydraulic cylinder is connected to one end of the movable frame grate extending to the outside of the furnace body.

6. The small concave-convex combined hearth and grate type pyrolysis gasification furnace according to claim 5, characterized in that: Three air inlets are arranged around the furnace body, a plurality of first air holes are arranged on each lateral sliding surface, a plurality of second air holes are arranged on the sprinkling and crushing cone, and a secondary air conveying pipe and a slag outlet are respectively installed on both sides of the bottom of the furnace body.

7. The small concave-convex combined hearth and grate type pyrolysis gasification furnace according to claim 6, characterized in that: The outer side wall of the driving shaft is also provided with a pushing spiral blade, and the pushing spiral blade is arranged inside the feeding hopper.

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