Biomass semi-gasification combustion device

Abstract

The utility model discloses a biomass semi-gasification combustion device which is composed of a multi-point feeding mechanism, a three-dimensional air distribution mechanism and a combustion device body, and the multi-point feeding mechanism is composed of a feeding rotary disc, a conical distributing device, a rotary water seal tank, a feeding shell and a fixed water seal tank. The combustion device body is formed by welding a body upper cover and the upper end of a shell, a furnace skirt is welded to the lower end of the shell, and the lower end of the furnace skirt is inserted into water of an ash basin to serve as an ash basin water seal partition plate. And the three-dimensional air distribution mechanism comprises a tower grid arranged in the combustion device main body, the tower grid is arranged on the top side of a tower grid supporting seat, and the tower grid supporting seat is fixedly arranged in the ash basin. The utility model has the advantages that: 1, both fuel gas and open fire are produced in the inner cavity of the device; 2, the biomass fuel application range is wide; 3, ash can be smoothly discharged under the condition that normal operation is not influenced; 4, the device can be suitable for a large-scale biomass semi-gasification combustion device; 5, the operation is easy and safe; and 6, the equipment investment is low, and the occupied area and space are small.

Description

Technical Field

[0001] The utility model relates to a biomass semi-gasification combustion device, belonging to the field of biomass burners. Background Art

[0002] Biomass burner is a biomass semi-gasification automatic control burner, a biomass high-temperature cracking burner that uses organic biomass such as biomass pellets as fuel. It is generally divided into two types: air-cooled biomass burner and water-cooled biomass burner.

[0003] Figure 1 This is a schematic diagram of an existing biomass burner. Figure 1 As shown, it is provided with a furnace chamber, a charging port 1-1 is provided at the top of the furnace chamber along the oblique upper direction, a fire outlet 1-2 is provided at the top horizontal direction of the furnace chamber, a porous fixed grate 1-3 is provided at the middle and lower part of the furnace chamber, a ash cleaning door 1-4 and a blast inlet 1-5 communicating with the furnace chamber are provided below the porous fixed grate 1-3, and an ignition port 1-6 is provided at the middle and lower part of the side wall of the furnace chamber. Although the above-mentioned biomass burner has a relatively simple structure, it also has some shortcomings: 1. The fuel used must be formed biomass pellets, which has a narrow range of application and the price of formed biomass pellets is as high as 1,000-1,300 yuan / ton; 2. Once the furnace chamber is slagging and cannot be handled, the furnace must be shut down, and then the furnace material must be removed from the ignition port 1-6 and re-ignited, causing the heat-using equipment to stop production; 3. Due to the single-point charging, the fuel is unevenly distributed in the furnace chamber, making it difficult to scale up the equipment; 4. The fuel is burned in a direct combustion manner, and the flame carries a lot of dust. Utility Model Content

[0004] Purpose of the utility model: The utility model makes improvements to the problems existing in the above-mentioned prior art, that is, the utility model discloses a biomass semi-gasification combustion device.

[0005] Technical solution: A biomass semi-gasification combustion device, consisting of a multi-point feeding mechanism, a three-dimensional air distribution mechanism and a combustion device body, wherein:

[0006] The multi-point feeding mechanism is composed of the following components:

[0007] The feeding turntable is an annular water box. The feeding turntable is welded by a turntable inner sleeve, a turntable outer sleeve, a turntable annular cover, and a turntable bottom plate. The turntable inner sleeve is concentrically arranged on the inner side of the turntable outer sleeve. The bottom of the turntable inner sleeve and the bottom of the turntable outer sleeve are welded through the turntable bottom plate, and the top of the turntable inner sleeve and the top of the turntable outer sleeve are welded through the turntable annular cover. The feeding turntable is evenly distributed along the circumference with a plurality of turntable blanking openings that pass through the feeding turntable. The top side of the trapezoidal ring is welded to the turntable annular cover, and the bottom end of the trapezoidal ring is welded to the turntable bottom plate to form the turntable blanking opening. The turntable blanking opening is isolated from the water in the feeding turntable, wherein:

[0008] A feeding turntable center shaft seat is provided at the center of the circle on the top side of the main body upper cover. A center shaft is sleeved in the center of the upper part of the feeding turntable center shaft seat. The top of the center shaft is welded to one end of the connecting plate, and the other end of the connecting plate is welded to the inner sleeve of the turntable.

[0009] The turntable bottom plate is arranged on the main body upper cover, and the turntable bottom plate is supported by the main body upper cover and is slidably fitted;

[0010] A feeding ratchet is provided on the outer edge of the annular cover of the turntable. The outer end of the feeding ratchet cooperates with one end of the feeding pawl. The other end of the feeding pawl is connected to the piston rod of the oil cylinder. The oil cylinder is fixed on the feeding housing. The piston rod of the oil cylinder is extended and retracted to pull the feeding pawl, and then drives the feeding turntable to rotate around the central axis through the feeding ratchet.

[0011] The turntable annular cover is provided with a plurality of turntable water connection holes connected to the bottom of the rotating water seal groove;

[0012] A conical distributor is provided in the feeding shell and is located at the lower center of the feeding port, and the lower end of the conical distributor is welded to the inner circle of the turntable annular cover as a whole;

[0013] The rotating water seal groove is formed by welding the lower ends of the rotating water seal inner ring plate and the lower ends of the rotating water seal outer ring plate to the turntable annular cover respectively. The lower end of the rotating water seal ring partition is inserted into the rotating water seal groove and separated from the turntable annular cover. The upper end of the rotating water seal ring partition is welded to the feeding shell;

[0014] The feeding shell is welded to the top ends of the four feeding box legs respectively, and the lower ends of the four feeding box legs are welded to the top side of the main body cover; a feeding port is welded on the upper part of the feeding shell, and a gate valve is provided in the feeding port. The gate valve is connected to the hydraulic cylinder piston rod in a transmission manner, and the opening and closing of the gate valve is controlled by the extension and contraction of the hydraulic cylinder piston rod. The upper end of the feeding port is adapted to the outlet of the lifting machine; an air pressure balance pipe outlet is provided in the feeding port, and the air pressure balance pipe outlet is used to balance the flue gas pressure, wherein:

[0015] A material stripping plate is welded and fixed on the inner wall of the feeding shell, and the lower end of the material stripping plate is hung corresponding to the blanking port of the turntable;

[0016] A fixed water seal groove is formed by welding the lower ends of the fixed water seal inner ring plate and the lower ends of the fixed water seal outer ring plate to the main body upper cover respectively. A fixed water seal ring partition is provided in the fixed water seal groove. The upper end of the fixed water seal ring partition is welded to the bottom side of the turntable annular cover, and the lower end of the fixed water seal ring partition is separated from the main body upper cover;

[0017] The combustion device body is welded together by the main body cover and the upper end of the shell. The lower end of the shell is welded with a furnace skirt. The lower end of the furnace skirt is inserted into the water in the ash basin and serves as an ash basin water seal baffle to seal the gas in the main body during ash removal.

[0018] The inner wall of the combustion device body is provided with a heat-insulating refractory material layer;

[0019] The main body upper cover is provided with main body dropout openings of the same number and size as the turntable dropout openings. When the turntable dropout openings and the main body dropout openings are in a completely or partially overlapping position, the material is added into the combustion device main body. When the turntable dropout openings and the main body dropout openings are in a completely non-overlapping position, the feed turntable seals the main body dropout openings.

[0020] The upper part of the main body cover and the upper part of the shell are both provided with a plurality of slag holes;

[0021] An ignition port is provided in the middle of the shell, and a fire outlet is provided in the upper middle portion of the shell;

[0022] Four legs are welded on the bottom side of the combustion device body;

[0023] The three-dimensional air distribution mechanism includes a tower grid arranged in the main body of the combustion device, the tower grid is arranged on the top side of the tower grid support seat, the tower grid support seat is fixed in the ash basin, the tower grid is welded by multiple layers of tower grid fans to form multiple layers of wind lines, and slag breaking teeth are welded on the multiple layers of tower grid fans. The lower end of the tower grid is welded to the support ring, and the lower end of the support ring is welded to the bottom of the ash basin. A cone bellows is welded to the lower end of the upper tower grid in the support ring, and a three-way pipe water seal baffle ring is welded to the lower end of the cone bellows. The lower end of the three-way pipe water seal baffle ring is inserted into the three-way pipe water seal groove, and the three-way pipe water seal groove is welded by a three-way pipe water seal jacket, a three-way pipe water seal groove bottom plate, and a three-way pipe upper part. Blast air is sent into the tower grid from the three-way pipe outlet at the upper end of the three-way pipe;

[0024] The middle part of the tee is welded to one end of the blast pipe, and the other end of the blast pipe is connected to the blower outlet. The blast pipe is provided with a balance air duct and a secondary air duct.

[0025] The lower end of the tee pipe is inserted into the water of the water tank to seal the blast, and the ash from the fine ash outlet at the lower end of the tee pipe is discharged into the water of the water tank. The fine ash can be fished out of the water at any time through the oblique side of the water tank. The lower end of the tee pipe is supported by a support plate;

[0026] The tower grid is welded to the bottom of the ash basin, and an ash basin track is welded to the bottom of the ash basin. The ash basin track falls on the support ring and forms a sliding fit with the support ring. The support ring is welded to the support ring bracket, and the support ring bracket is welded and fixed to the support leg;

[0027] The outer edge of the ash basin bottom is provided with an ash basin ratchet, which cooperates with the pawl to pull the ash basin and the tower grid to rotate together. The small ash knife pushes the ash to the outer edge of the ash basin bottom, and the large ash knife shovels it out of the ash basin water and discharges it at the ash outlet point, wherein:

[0028] The upper part of the large ash knife is fixedly connected to the supporting legs, and the inner curvature of the large ash knife is adapted to the curvature of the inner side of the ash basin;

[0029] The upper part of the small ash knife is fixed to the furnace skirt, and the bottom of the small ash knife is separated from the bottom of the ash basin.

[0030] Furthermore, the thickness of the thermal insulation refractory material layer is 12-25 cm.

[0031] The ventilation area of ​​the multi-layer wind lines is several times that of the fixed grate of the biomass burner, which can reduce the wind speed and gently supply air to gasify the biomass, while reducing the amount of dust carried by the fire outlet.

[0032] Beneficial effects: The biomass semi-gasification combustion device disclosed in the utility model has the following beneficial effects:

[0033] 1. There is both gas and open flame in the inner cavity of the device. The open flame ignites the gas, that is, the gas is ignited as it is produced, and flames are ejected from the device outlet. Firstly, there is no gas accumulation and no gas explosion. Secondly, solid fuel is converted into gas fuel combustion, which solves the pollution problem caused by direct combustion of biomass.

[0034] 2. It is suitable for a wide range of biomass fuels, including biomass pellets, biomass crushed materials, and biomass fuels with slagging properties;

[0035] 3. Even if the biomass fuel is slagging in the main body due to high temperature, the ash can be discharged smoothly without affecting the normal operation of the device;

[0036] 4. Can be adapted to large-scale biomass semi-gasification combustion devices;

[0037] 5. Easy to operate and safe to operate;

[0038] 6. Small equipment investment, small floor space and space. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 This is a schematic diagram of an existing biomass burner.

[0040] Figure 2 This is a schematic front view of a biomass semi-gasification combustion device disclosed in the utility model.

[0041] Figure 3 This is a top view schematic diagram of a biomass semi-gasification combustion device disclosed in the utility model.

[0042] Figure 4 This is a top view of the feeding turntable.

[0043] Figure 5 It is a top view schematic diagram of the fixed water seal groove.

[0044] Figure 6 Schematic diagram of the tower grid.

[0045] Figure 7 This is a schematic diagram of the main view of the material stripping plate.

[0046] Figure 8 Schematic diagram of the top view of the material stripping plate.

[0047] Figure 9 This is a schematic diagram of the main view of the trapezoidal ring.

[0048] Figure 10 Schematic diagram of the trapezoidal ring from top view.

[0049] Figure 11 This is a schematic diagram of the large gray knife.

[0050] Figure 12 This is a schematic diagram of the main view of the small gray knife.

[0051] Figure 13 This is a top view of the small gray knife.

[0052] Among them: existing technology

[0053] 1-1: Feeding port 1-2: Fire outlet 1-3: porous fixed grate 1-4: Cleaning door 1-5: Blast inlet 1-6: Ignition port

[0054] This application:

[0055]

[0056] DETAILED DESCRIPTION

[0057] The specific implementation methods of the present utility model are described in detail below.

[0058] The "ranges" disclosed in this utility model are defined in the form of lower limits and upper limits. A given range is defined by selecting a lower limit and an upper limit, and the selected lower limit and upper limit define the boundaries of the particular range. Ranges defined in this manner can be inclusive or exclusive of the end values ​​and can be combined arbitrarily, that is, any lower limit can be combined with any upper limit to form a range. For example, if a range of 10 to 50 is listed for a particular parameter, it is understood that ranges of 10 to 40 and 20 to 50 are also contemplated. Furthermore, if the minimum range values ​​listed are 1 and 2, and if the maximum range values ​​listed are 3, 4, and 5, then the following ranges are all contemplated: 1 to 3, 1 to 4, 1 to 5, 2 to 3, 2 to 4, and 2 to 5. In this application, unless otherwise specified, the numerical range "a to b" is an abbreviation for any combination of real numbers between a and b, where a and b are real numbers. For example, the numerical range "0 to 5" means that all real numbers between "0 to 5" are listed herein, and "0 to 5" is merely an abbreviation for these numerical combinations.

[0059] Unless otherwise specified, all embodiments and optional embodiments of the present application can be combined with each other to form a new technical solution.

[0060] Unless otherwise specified, all technical features and optional technical features of this application can be combined with each other to form a new technical solution.

[0061] Unless otherwise specified, all steps of the present application may be performed sequentially or randomly, preferably sequentially. For example, the method includes steps (a) and (b), indicating that the method may include steps (a) and (b) performed sequentially, or may include steps (b) and (a) performed sequentially. For example, the method may further include step (c), indicating that step (c) may be added to the method in any order, for example, the method may include steps (a), (b) and (c), or may include steps (a), (c) and (b), or may include steps (c), (a) and (b), etc.

[0062] Unless otherwise specified, the terms "include" and "comprising" used in this application may be open-ended or closed-ended. For example, "include" and "comprising" may mean that other components not listed may also be included or that only the listed components are included.

[0063] Unless otherwise specified, the reaction is carried out at room temperature and pressure.

[0064] Unless otherwise specified, all parts or percentages are by weight.

[0065] In the present invention, all substances used are known substances and can be purchased or synthesized by known methods.

[0066] In the present invention, the devices or equipment used are all conventional devices or equipment known in the field and are all commercially available.

[0067] Example 1

[0068] A biomass semi-gasification combustion device is composed of a multi-point feeding mechanism, a three-dimensional air distribution mechanism and a combustion device body, wherein:

[0069] The multi-point feeding mechanism is composed of the following components:

[0070] The feeding turntable is an annular water box. The feeding turntable is welded by a turntable inner sleeve 33, a turntable outer sleeve 38, a turntable annular cover 34, and a turntable bottom plate 41. The turntable inner sleeve 33 is concentrically arranged on the inner side of the turntable outer sleeve 38. The bottom of the turntable inner sleeve 33 and the bottom of the turntable outer sleeve 38 are welded through the turntable bottom plate 41, and the top of the turntable inner sleeve 33 and the top of the turntable outer sleeve 38 are welded through the turntable annular cover 34. The feeding turntable is evenly distributed along the circumference with a plurality of turntable dropouts 36 that pass through the feeding turntable. The top side of the trapezoidal ring 56 is welded to the turntable annular cover 34, and the bottom end of the trapezoidal ring 56 is welded to the turntable bottom plate 41 to form the turntable dropout 36. The turntable dropout 36 is isolated from the water in the feeding turntable, wherein:

[0071] A feed turntable center shaft seat 58 is provided at the center of the top side of the main body upper cover 39. A center shaft 57 is sleeved in the center of the upper part of the feed turntable center shaft seat 58. The top of the center shaft 57 is welded to one end of a connecting plate 59, and the other end of the connecting plate 59 is welded to the turntable inner sleeve 33.

[0072] The turntable bottom plate 41 is provided on the main body upper cover 39 , and the turntable bottom plate 41 is supported and slidably fitted by the main body upper cover 39 ;

[0073] The outer edge of the turntable annular cover 34 is provided with a feeding ratchet 37. The outer end of the feeding ratchet 37 cooperates with one end of a feeding pawl 60. The other end of the feeding pawl 60 is connected to the piston rod of the oil cylinder. The oil cylinder is fixed to the feeding housing 31. The piston rod of the oil cylinder is extended and retracted to pull the feeding pawl 60, which in turn drives the feeding turntable to rotate around the central axis 57 through the feeding ratchet 37.

[0074] The turntable annular cover 34 is provided with a plurality of turntable water connection holes 35 connected to the bottom of the rotating water seal groove;

[0075] The conical distributor 27 is provided in the feeding housing 31 and is located at the lower center of the feeding port 29. The lower end of the conical distributor 27 is welded to the inner circle of the turntable annular cover 34.

[0076] The rotating water seal groove is formed by welding the lower ends of the rotating water seal inner ring plate 23 and the lower ends of the rotating water seal outer ring plate 25 to the turntable annular cover 34 respectively. The lower end of the rotating water seal ring partition 24 is inserted into the rotating water seal groove and separated from the turntable annular cover 34. The upper end of the rotating water seal ring partition 24 is welded to the feeding shell 31;

[0077] The feeding shell 31 is welded to the top of the four feeding box legs 32 respectively, and the lower ends of the four feeding box legs 32 are welded to the top side of the main body cover 39; a feeding port 29 is welded on the upper part of the feeding shell 31, and a gate valve 30 is provided in the feeding port 29. The gate valve 30 is connected to the hydraulic cylinder piston rod by transmission, and the opening and closing of the gate valve 30 is controlled by the extension and contraction of the hydraulic cylinder piston rod. The upper end of the feeding port 29 is adapted to the outlet of the lifting machine; a wind pressure balance pipe outlet 28 is provided in the feeding port 29, and the wind pressure balance pipe outlet 28 is used to balance the flue gas pressure, wherein:

[0078] A material stripping plate 26 is welded and fixed on the inner wall of the feeding shell 31, and the lower end of the material stripping plate 26 is suspended corresponding to the turntable blanking port 36;

[0079] The fixed water seal groove is formed by welding the lower ends of the fixed water seal inner ring plate 20 and the lower ends of the fixed water seal outer ring plate 22 to the main body upper cover 39 respectively. A fixed water seal ring partition 21 is provided in the fixed water seal groove. The upper end of the fixed water seal ring partition 21 is welded to the bottom side of the turntable annular cover 34, and the lower end of the fixed water seal ring partition 21 is separated from the main body upper cover 39.

[0080] The combustion device body is welded together by the main body cover 39 and the upper end of the shell 43. The lower end of the shell 43 is welded to the furnace skirt 13. The lower end of the furnace skirt 13 is inserted into the water of the ash basin 11 and serves as an ash basin water seal partition to seal the gas in the main body during ash removal.

[0081] The inner wall of the combustion device body is provided with a heat-insulating refractory material layer;

[0082] The main body upper cover 39 is provided with main body dropout openings 40 of the same number and size as the turntable dropout openings 36. When the turntable dropout openings 36 and the main body dropout openings 40 are in a completely or partially overlapping position, the fuel is fed into the combustion device main body. When the turntable dropout openings 36 and the main body dropout openings 40 are in a completely non-overlapping position, the feed turntable seals the main body dropout openings 40.

[0083] The upper part of the main body cover 39 and the upper part of the shell 43 are both provided with a plurality of slag holes 19;

[0084] The middle portion of the shell 43 is provided with an ignition port 18, and the upper middle portion of the shell 43 is provided with a fire outlet 42;

[0085] Four legs 4 are welded on the bottom side of the combustion device body;

[0086] The three-dimensional air distribution mechanism includes a tower grid 45 arranged in the main body of the combustion device, the tower grid 45 is arranged on the top side of the tower grid support seat 14, the tower grid support seat 14 is fixed in the ash basin 11, the tower grid 45 is welded by multiple layers of tower grid fans 16 to form multiple layers of wind lines 17, and slag breaking teeth 44 are welded on the multiple layers of tower grid fans 16. The lower end of the tower grid 45 is welded to the support ring 6, and the lower end of the support ring 6 is welded to the ash basin bottom 8. The lower end of the tower grid 45 in the upper part of the support ring 6 is welded with a cone bellows 15, and the lower end of the cone bellows 15 is welded to a three-way pipe water seal baffle ring 50. The lower end of the three-way pipe water seal baffle ring 50 is inserted into the three-way pipe water seal groove, and the three-way pipe water seal groove is welded by a three-way pipe water seal jacket 53, a three-way pipe water seal groove bottom plate 54, and the upper part of the three-way pipe 49. The blast is sent into the tower grid 45 through the three-way pipe outlet 46 at the upper end of the three-way pipe 49;

[0087] The middle part of the tee pipe 49 is welded to one end of the blast pipe 55, and the other end of the blast pipe 55 is connected to the blower outlet. The blast pipe 55 is provided with a balance air pipe 51 and a secondary air pipe 52.

[0088] The lower end of the tee pipe 49 is inserted into the water of the water tank 3 to seal the blast. The ash discharged from the fine ash outlet 1 at the lower end of the tee pipe 49 falls into the water of the water tank 3. The fine ash can be fished out of the water at any time through the oblique side of the water tank 3. The lower end of the tee pipe 49 is supported by the support plate 2.

[0089] The tower grid 45 is welded to the ash basin bottom 8 as a whole, and the ash basin bottom 8 is welded with an ash basin track 7. The ash basin track 7 falls on the support ring 6 and forms a sliding fit with the support ring 6. The support ring 6 is welded to the support ring bracket 5, and the support ring bracket 5 is welded and fixed to the support leg 4;

[0090] The outer edge of the ash basin bottom 8 is provided with an ash basin ratchet 9, which cooperates with the pawl 47 to pull the ash basin 11 and the tower grid 45 to rotate together, and the small ash knife 48 pushes the ash to the outer edge of the ash basin bottom 8, and the large ash knife 10 shovels it out of the ash basin water and discharges it from the ash outlet point 12, wherein:

[0091] The upper portion of the large ash knife 10 is fixedly connected to the support leg 4, and the inner curvature of the large ash knife 10 is adapted to the curvature of the inner side of the ash basin 11;

[0092] The upper portion of the small ash knife 48 is fixed to the furnace skirt 13 , and the bottom of the small ash knife 48 is separated from the bottom of the ash basin 11 .

[0093] Furthermore, the thickness of the thermal insulation refractory material layer is 20 cm.

[0094] Example 2

[0095] It is substantially the same as Example 1, with the only difference being that the thickness of the thermal insulation refractory material layer is 12 cm.

[0096] Example 3

[0097] It is substantially the same as Example 1, with the only difference being that the thickness of the thermal insulation refractory material layer is 25 cm.

[0098] The above describes the embodiments of the present invention in detail. However, the present invention is not limited to the above embodiments, and various modifications can be made within the scope of knowledge possessed by ordinary technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. A biomass semi-gasification combustion device, characterized in that: It consists of a multi-point feeding mechanism, a three-dimensional air distribution mechanism and a combustion device body, among which: The multi-point feeding mechanism is composed of the following components: The feeding turntable is an annular water box. The feeding turntable is welded by a turntable inner sleeve, a turntable outer sleeve, a turntable annular cover, and a turntable bottom plate. The turntable inner sleeve is concentrically arranged on the inner side of the turntable outer sleeve. The bottom of the turntable inner sleeve and the bottom of the turntable outer sleeve are welded through the turntable bottom plate, and the top of the turntable inner sleeve and the top of the turntable outer sleeve are welded through the turntable annular cover. The feeding turntable is evenly distributed along the circumference with a plurality of turntable blanking openings that pass through the feeding turntable. The top side of the trapezoidal ring is welded to the turntable annular cover, and the bottom end of the trapezoidal ring is welded to the turntable bottom plate to form the turntable blanking opening. The turntable blanking opening is isolated from the water in the feeding turntable, wherein: A feeding turntable center shaft seat is provided at the center of the circle on the top side of the main body upper cover. A center shaft is sleeved in the center of the upper part of the feeding turntable center shaft seat. The top of the center shaft is welded to one end of the connecting plate, and the other end of the connecting plate is welded to the inner sleeve of the turntable. The turntable bottom plate is arranged on the main body upper cover, and the turntable bottom plate is supported by the main body upper cover and is slidably fitted; A feeding ratchet is provided on the outer edge of the annular cover of the turntable. The outer end of the feeding ratchet cooperates with one end of the feeding pawl. The other end of the feeding pawl is connected to the piston rod of the oil cylinder. The oil cylinder is fixed on the feeding housing. The piston rod of the oil cylinder is extended and retracted to pull the feeding pawl, and then drives the feeding turntable to rotate around the central axis through the feeding ratchet. The turntable annular cover is provided with a plurality of turntable water connection holes connected to the bottom of the rotating water seal groove; A conical distributor is provided in the feeding shell and is located at the lower center of the feeding port, and the lower end of the conical distributor is welded to the inner circle of the turntable annular cover; The rotating water seal groove is formed by welding the lower ends of the rotating water seal inner ring plate and the lower ends of the rotating water seal outer ring plate to the turntable annular cover respectively. The lower end of the rotating water seal ring partition is inserted into the rotating water seal groove and separated from the turntable annular cover. The upper end of the rotating water seal ring partition is welded to the feeding shell; The feeding shell is welded to the top ends of the four feeding box legs respectively, and the lower ends of the four feeding box legs are welded to the top side of the main body cover; a feeding port is welded on the upper part of the feeding shell, and a gate valve is provided in the feeding port. The gate valve is connected to the hydraulic cylinder piston rod in a transmission manner, and the opening and closing of the gate valve is controlled by the extension and contraction of the hydraulic cylinder piston rod. The upper end of the feeding port is adapted to the outlet of the lifting machine; an air pressure balance pipe outlet is provided in the feeding port, and the air pressure balance pipe outlet is used to balance the flue gas pressure, wherein: A material stripping plate is welded and fixed on the inner wall of the feeding shell, and the lower end of the material stripping plate is hung corresponding to the blanking port of the turntable; A fixed water seal groove is formed by welding the lower ends of the fixed water seal inner ring plate and the lower ends of the fixed water seal outer ring plate to the main body upper cover respectively. A fixed water seal ring partition is provided in the fixed water seal groove. The upper end of the fixed water seal ring partition is welded to the bottom side of the turntable annular cover, and the lower end of the fixed water seal ring partition is separated from the main body upper cover; The combustion device body is welded together by the main body cover and the upper end of the shell. The lower end of the shell is welded with a furnace skirt. The lower end of the furnace skirt is inserted into the water in the ash basin and serves as an ash basin water seal baffle to seal the gas in the main body during ash removal. The inner wall of the combustion device body is provided with a heat-insulating refractory material layer; The main body upper cover is provided with main body dropout openings of the same number and size as the turntable dropout openings. When the turntable dropout openings and the main body dropout openings are in a completely or partially overlapping position, the material is added into the combustion device main body. When the turntable dropout openings and the main body dropout openings are in a completely non-overlapping position, the feed turntable seals the main body dropout openings. The upper part of the main body cover and the upper part of the shell are both provided with a plurality of slag holes; An ignition port is provided in the middle of the shell, and a fire outlet is provided in the upper middle portion of the shell; Four legs are welded on the bottom side of the combustion device body; The three-dimensional air distribution mechanism includes a tower grid arranged below the main body of the combustion device, the tower grid is arranged on the top side of the tower grid support seat, the tower grid support seat is fixed in the ash basin, the tower grid is welded by multiple layers of tower grid fans to form multiple layers of wind lines, and slag breaking teeth are welded on the multiple layers of tower grid fans. The lower end of the tower grid is welded to the support ring, and the lower end of the support ring is welded to the bottom of the ash basin. A cone bellows is welded to the lower end of the upper tower grid in the support ring, and a three-way pipe water seal baffle ring is welded to the lower end of the cone bellows. The lower end of the three-way pipe water seal baffle ring is inserted into the three-way pipe water seal groove, and the three-way pipe water seal groove is welded by a three-way pipe water seal jacket, a three-way pipe water seal groove bottom plate, and a three-way pipe upper part. Blast air is sent into the tower grid from the three-way pipe outlet at the upper end of the three-way pipe; The middle part of the tee is welded to one end of the blast pipe, and the other end of the blast pipe is connected to the blower outlet. The blast pipe is provided with a balance air duct and a secondary air duct. The lower end of the tee pipe is inserted into the water of the water tank to seal the blast, and the ash from the fine ash outlet at the lower end of the tee pipe is discharged into the water of the water tank. The fine ash can be fished out of the water at any time through the oblique side of the water tank. The lower end of the tee pipe is supported by a support plate; The tower grid is welded to the bottom of the ash basin, and an ash basin track is welded to the bottom of the ash basin. The ash basin track falls on the support ring and forms a sliding fit with the support ring. The support ring is welded to the support ring bracket, and the support ring bracket is welded and fixed to the support leg; The outer edge of the ash basin bottom is provided with an ash basin ratchet, which cooperates with the pawl to pull the ash basin and the tower grid to rotate together. The small ash knife pushes the ash to the outer edge of the ash basin bottom, and the large ash knife shovels it out of the ash basin water and discharges it at the ash outlet point, wherein: The upper part of the large ash knife is fixedly connected to the supporting legs, and the inner curvature of the large ash knife is adapted to the curvature of the inner side of the ash basin; The upper part of the small ash knife is fixed to the furnace skirt, and the bottom of the small ash knife is separated from the bottom of the ash basin.

2. A biomass semi-gasification combustion device according to claim 1, characterized in that: The thickness of the thermal insulation refractory material layer is 12-25 cm.

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