A gasifier rotary grate

Abstract

This utility model discloses a rotary grate for a gasifier, belonging to the technical field of gasifiers. It includes a support base, a grate seat rotatably connected to the support base, a gasifier body mounted on the grate seat, a conical groove at the top of the grate seat, and a spiral guide plate fixedly connected to the inner cavity of the gasifier body. The bottom surface of the spiral guide plate is in contact with the top surface of the conical groove. A cleaning mechanism is provided on the grate seat. In this utility model, when the grate seat rotates, it drives the support plate and the annular bevel gear seat to rotate. The meshing transmission between the annular bevel gear seat and two bevel gears drives the chopping shaft and chopping blade to rotate. The chopping blade crushes the material conveyed in the preheating zone, preparing it for subsequent pyrolysis. Simultaneously, the support plate and protective cover protect the annular bevel gear seat and bevel gears, preventing material and waste from falling onto them. This design is highly practical.

Description

Technical Field

[0001] This utility model relates to the field of gasification furnace technology, and more specifically, to a rotating grate for a gasification furnace. Background Technology

[0002] A biomass gasifier is a device that heats biomass in an oxidation zone to produce carbon dioxide, which then reacts with carbon and water vapor in a reduction zone to produce combustible gases such as carbon monoxide, methane, and hydrogen. These gases are then subjected to high-temperature pyrolysis and drying in a fuel preparation zone to achieve better heat output. The gasifier grate is a key component of the gasifier, its main function being to support the fuel and promote its gasification reaction. The grate is typically composed of multiple metal strips or metal sieves, designed to ensure that the fuel can successfully undergo chemical reactions, heating, and oxidation processes at high temperatures.

[0003] A search revealed that utility model patent CN220098925U discloses a rotating grate for a biomass gasification furnace, comprising a rotating grate body installed inside a rotating furnace, a transmission mechanism connected to the rotating furnace at the bottom outer side of the rotating grate body, a feed inlet on one side of the rotating grate body, a furnace chamber connected to the feed inlet inside the rotating grate body, a flow divider plate fixedly installed inside the furnace chamber, and the furnace chamber, under the action of the flow divider plate, sequentially comprising a preheating zone, a pyrolysis zone, a reduction zone, an oxidation zone, and a slag discharge zone from the outside to the inside. The preheating zone is connected to the feed inlet, the oxidation zone has a gas supply channel, and a bevel gear seat is installed on the upper side of the slag discharge zone in the furnace chamber. The bevel gear seat is meshed with several bevel gears, and the several bevel gears are connected to a stirring shaft. The other side of the stirring shaft passes through the flow divider plate and the furnace chamber and extends to the outer side of the rotating grate body, and an agitator is sleeved on the surface of the stirring shaft. However, the aforementioned patents still have the following shortcomings: the bevel gears and bevel gear seats are directly exposed in the rotary furnace, and the waste generated during fuel combustion easily falls onto the bevel gears and bevel gear seats, affecting the smooth operation of the rotary grate. In addition, when fuel burns in the gas supply channel, the gas supply channel is easily blocked. To address these issues, we have proposed a rotary grate for a gasifier. Utility Model Content

[0004] In view of the problems existing in the prior art, the purpose of this utility model is to provide a rotating grate for a gasifier.

[0005] To solve the above problems, the present invention adopts the following technical solution:

[0006] A rotating grate for a gasifier includes a support base, a grate seat rotatably connected to the support base, a gasifier body mounted on the grate seat, a conical groove at the top of the grate seat, a spiral guide plate fixedly connected to the inner cavity of the gasifier body, the bottom surface of the spiral guide plate being in contact with the top surface of the inner cavity of the conical groove, a cleaning mechanism on the grate seat, multiple air supply holes on the top surface of the inner cavity of the conical groove, two support columns fixedly connected to the bottom of the inner cavity of the conical groove, a support plate fixedly connected to the top of the two support columns, an annular bevel gear seat on the top surface of the support plate, two chopping shafts rotatably connected to the spiral guide plate, multiple chopping blades fixedly connected to each of the two chopping shafts, bevel gears fixedly sleeved at the ends of the two chopping shafts, the two bevel gears meshing with the annular bevel gear seat, and protective covers sleeved on the outer sides of the ends of the two chopping shafts, the protective covers being located above the support plate.

[0007] As a preferred embodiment of this utility model, the cleaning mechanism includes an electric push rod fixedly installed at the bottom of the grate seat. The output end of the electric push rod extends into the inner cavity of the grate seat and is fixedly connected to a lifting plate. The top surface of the lifting plate is provided with a plurality of pins, which are respectively located directly below a plurality of air supply holes. The outer diameter of the pins is equal to the inner diameter of the air supply holes.

[0008] As a preferred embodiment of this utility model, a preheating zone is provided above the conical groove and on the side of the spiral guide plate, a pyrolysis zone is provided above the conical groove and on the inner side of the spiral guide plate, the gas supply hole is located in the pyrolysis zone, and a slag discharge hole is provided in the middle of the grate seat.

[0009] As a preferred embodiment of this utility model, a feed inlet is provided on the outer side of the gasification furnace body.

[0010] As a preferred embodiment of this utility model, a spur gear is fixedly sleeved on the outer side of the grate seat.

[0011] In a preferred embodiment of this utility model, an annular seat is fixedly connected to the top surface of the support plate, and the outer side of the annular seat is in contact with the inner wall of the protective cover.

[0012] Compared with the prior art, the advantages of this utility model are as follows: In this utility model, when the grate seat rotates, it drives the support plate and the ring bevel gear seat to rotate. Through the meshing transmission between the ring bevel gear seat and the two bevel gears, it drives the chopping shaft and the chopping blade to rotate. The chopping blade is used to crush the material conveyed in the preheating zone, preparing for subsequent pyrolysis. At the same time, the support plate and the protective cover protect the ring bevel gear seat and the bevel gears, preventing materials and waste from falling onto the bevel gears and the ring bevel gear seat.

[0013] In this invention, an electric push rod is used at regular intervals to drive the lifting plate and the pins upward, so that the top of the pins is inserted into the air supply hole. This allows the pins to push out the material blocking the air supply hole, thereby cleaning the air supply hole and preventing it from being blocked by material. This improves the practicality of the gasifier's rotary grate. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0015] Figure 2 This is a schematic diagram of the internal structure of the gasification furnace body of this utility model;

[0016] Figure 3 This is a schematic cross-sectional view of the present invention;

[0017] Figure 4 This is a schematic diagram of the grate seat of this utility model;

[0018] Figure 5 This is a bottom view of the grate seat of this utility model;

[0019] Figure 6 This is a schematic diagram of the spiral guide plate of this utility model.

[0020] Explanation of the labels in the diagram:

[0021] 1. Support base; 2. Grate base; 3. Conical groove; 4. Slag discharge hole; 5. Gasification furnace body; 6. Spiral guide plate; 7. Preheating zone; 8. Pyrolysis zone; 9. Gas supply hole; 10. Cleaning mechanism; 11. Support column; 12. Support plate; 13. Annular bevel gear seat; 14. Chopping shaft; 15. Chopping blade; 16. Bevel gear; 17. Protective cover; 18. Annular seat; 19. Electric push rod; 20. Lifting plate; 21. Insert pin; 22. Spur gear; 23. Feed inlet. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0023] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "top / bottom," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0024] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "sleeved / connected," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. Example 1:

[0025] Please see Figure 1-6 A rotating grate for a gasifier includes a support base 1, a grate seat 2 rotatably connected to the support base 1, a gasifier body 5 mounted on the grate seat 2, a conical groove 3 at the top of the grate seat 2, a spiral guide plate 6 fixedly connected to the inner cavity of the gasifier body 5, the bottom surface of the spiral guide plate 6 abutting against the top surface of the inner cavity of the conical groove 3, a cleaning mechanism 10 mounted on the grate seat 2, multiple air supply holes 9 on the top surface of the inner cavity of the conical groove 3, and two support columns 11 fixedly connected to the bottom of the inner cavity of the conical groove 3. A support plate 12 is fixedly connected to the top of the support column 11. An annular bevel gear seat 13 is provided on the top surface of the support plate 12. Two shredding shafts 14 are rotatably connected to the spiral guide plate 6. Multiple shredding blades 15 are fixedly connected to the two shredding shafts 14 respectively. Bevel gears 16 are fixedly sleeved at the ends of the two shredding shafts 14 respectively. The two bevel gears 16 and the annular bevel gear seat 13 mesh with each other. A protective cover 17 is sleeved on the outer side of the ends of the two shredding shafts 14. The protective cover 17 is located above the support plate 12.

[0026] In this embodiment, the bevel gear 16 and the annular bevel gear seat 13 are protected by the support plate 12 and the protective cover 17 to prevent biomass materials from falling onto the annular bevel gear seat 13 and the bevel gear 16.

[0027] For details, please refer to Figure 3 and Figure 4The cleaning mechanism 10 includes an electric push rod 19 fixedly installed at the bottom of the grate seat 2. The output end of the electric push rod 19 extends into the inner cavity of the grate seat 2 and is fixedly connected to a lifting plate 20. The top surface of the lifting plate 20 is provided with a plurality of pins 21. The plurality of pins 21 are located directly below a plurality of air supply holes 9. The outer diameter of the pins 21 is equal to the inner diameter of the air supply holes 9.

[0028] In this embodiment, the electric push rod 19 is used to drive the lifting plate 20 and the pin 21 to move upward, so that the pin 21 can be inserted into the air supply hole 9, thereby clearing the material blocking the air supply hole 9.

[0029] For details, please refer to Figure 1 and Figure 2 A preheating zone 7 is provided above the conical groove 3 and on the side of the spiral guide plate 6. A pyrolysis zone 8 is provided above the conical groove 3 and on the inner side of the spiral guide plate 6. An air supply hole 9 is located in the pyrolysis zone 8. A slag discharge hole 4 is provided in the middle of the grate seat 2.

[0030] In this embodiment, the material is preheated in the preheating zone 7 and pyrolyzed in the pyrolysis zone 8.

[0031] For details, please refer to Figure 1 and Figure 2 A feed inlet 23 is provided on the outer side of the gasifier body 5.

[0032] In this embodiment, the material is placed into the conical groove 3 through the feed inlet 23.

[0033] For details, please refer to Figure 1 and Figure 3 A spur gear 22 is fixedly sleeved on the outer side of the grate seat 2.

[0034] In this embodiment, the grate seat 2 is driven to rotate by the meshing of an external gear and a spur gear 22, so as to drive the material on the conical groove 3 at the top of the grate seat 2 to rotate.

[0035] For details, please refer to Figures 1 to 4 The top surface of the support plate 12 is fixedly connected to an annular seat 18, and the outer side of the annular seat 18 is in contact with the inner wall of the protective cover 17.

[0036] In this embodiment, the inner side of the protective cover 17 is supported by the annular seat 18 to ensure the sealing between the support plate 12 and the protective cover 17.

[0037] Working principle: When in use, the material is put into the inner cavity of the gasifier body 5 through the feed port 23 and falls into the conical groove 3. The spur gear 22 and the external drive gear drive the grate seat 2 to rotate. The rotation of the grate seat 2 drives the material on the conical groove 3 to move synchronously. At the same time, the spiral guide plate 6 guides the material, so that the material moves in the preheating zone 7 to preheat the material and then enters the pyrolysis zone 8 to pyrolyze the material to produce combustible gas. The waste residue after pyrolysis is discharged from the slag discharge hole 4.

[0038] During the rotation of the grate seat 2, the support column 11, support plate 12 and annular bevel gear seat 13 are driven to rotate. The meshing transmission between the annular bevel gear seat 13 and the two bevel gears 16 drives the shredding shaft 14 and the shredding blade 15 to rotate. The shredding blade 15 is used to crush the material conveyed in the preheating zone 7 to prepare for subsequent pyrolysis. At the same time, the support plate 12 and the protective cover 17 protect the annular bevel gear seat 13 and the bevel gears 16.

[0039] Additionally, the electric push rod 19 is activated at regular intervals to move the lifting plate 20 and the pin 21 upwards, so that the top of the pin 21 is inserted into the air supply hole 9. This allows the pin 21 to push out the material blocking the air supply hole 9, thereby cleaning the air supply hole 9 and preventing it from being blocked by material.

[0040] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model based on the technical solution and its improved concept should be covered within the protection scope of the present utility model.

Claims

1. A gasifier rotary grate, comprising a support base (1), characterized in that: A grate seat (2) is rotatably connected to the support base (1). A gasification furnace body (5) is provided on the grate seat (2). A conical groove (3) is provided at the top of the grate seat (2). A spiral guide plate (6) is fixedly connected to the inner cavity of the gasification furnace body (5). The bottom surface of the spiral guide plate (6) and the top surface of the inner cavity of the conical groove (3) are in contact. A cleaning mechanism (10) is provided on the grate seat (2). Multiple air supply holes (9) are provided on the top surface of the inner cavity of the conical groove (3). Two support columns (11) are fixedly connected to the bottom of the inner cavity of the conical groove (3). A support plate (12) is fixedly connected to the top of the spiral guide plate (6). A ring bevel gear seat (13) is provided on the top surface of the support plate (12). Two shredding shafts (14) are rotatably connected to the spiral guide plate (6). Multiple shredding blades (15) are fixedly connected to the two shredding shafts (14). Bevel gears (16) are fixedly sleeved at the ends of the two shredding shafts (14). The two bevel gears (16) and the ring bevel gear seat (13) mesh with each other. A protective cover (17) is sleeved on the outer side of the ends of the two shredding shafts (14). The protective cover (17) is located above the support plate (12).

2. The gasifier rotary grate according to claim 1, characterized in that: The cleaning mechanism (10) includes an electric push rod (19) fixedly installed at the bottom of the grate seat (2). The output end of the electric push rod (19) extends into the inner cavity of the grate seat (2) and is fixedly connected to a lifting plate (20). The top surface of the lifting plate (20) is provided with a plurality of pins (21). The plurality of pins (21) are located directly below a plurality of air supply holes (9). The outer diameter of the pins (21) is equal to the inner diameter of the air supply holes (9).

3. The rotary grate of a gasifier according to claim 1, characterized in that: A preheating zone (7) is provided above the conical groove (3) and on the side of the spiral guide plate (6). A pyrolysis zone (8) is provided above the conical groove (3) and on the inner side of the spiral guide plate (6). The gas supply hole (9) is located in the pyrolysis zone (8). A slag discharge hole (4) is provided in the middle of the grate seat (2).

4. The rotary grate of a gasifier according to claim 1, characterized in that: The gasifier body (5) is provided with a feed inlet (23) on the outside.

5. A gasifier rotary grate according to claim 1, characterized in that: A spur gear (22) is fixedly sleeved on the outer side of the grate seat (2).

6. A gasifier rotary grate according to claim 1, characterized in that: The top surface of the support plate (12) is fixedly connected to an annular seat (18), and the outer side of the annular seat (18) is in contact with the inner wall of the protective cover (17).

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