Oxidation rack device for biomass gasification furnace and biomass gasification furnace

Abstract

The utility model provides an oxidation rack device for a biomass gasification furnace, comprising a plurality of grate units arranged in parallel at a preset interval, and beams located at both ends of each grate unit for supporting and fixing the grate units. The grate units are all columnar structures with cavities arranged axially inside. The beams are provided with cooling liquid infusion pipes connected from the ends to the internal cavities of each grate unit, which are used to introduce cooling liquid into the grate unit to cool the grate unit. The middle cavity of each grate unit is connected to the cooling liquid infusion pipe once through the end to introduce the cooling liquid into the grate unit, and cool the grate unit during use to avoid the temperature of the grate unit being too high to the extent that its own structure may be damaged. The use of this design can effectively extend the service life of the oxidation layer grate, reduce the material requirements for the oxidation layer material, and reduce the use cost of the biomass gasification furnace. The utility model also provides a biomass gasification furnace.

Description

Technical Field

[0001] The utility model relates to the technical field of biomass energy, in particular to an oxidation rack device for a biomass gasification furnace and also to a biomass gasification furnace. Background Art

[0002] A biomass gasifier is a device that converts biomass resources into energy. Its main principle is to convert biomass into gaseous fuel through a high-temperature oxidation process. Currently, biomass gasifiers that produce gas from straw, forest waste, edible mushroom residue, and cattle and sheep manure are widely used in the green energy sector. They can replace natural gas and liquefied petroleum gas to a certain extent, and are clean and environmentally friendly.

[0003] Under current technological conditions, biomass gasifiers primarily operate using flat, reciprocating, and tower-type grates. Their primary design structure comprises an oxidation layer, a reduction layer, a cracking layer, and a drying layer. The oxidation layer operates as follows: The biomass is primarily oxidized in the oxidation layer. The gasifying agent is introduced from the lower portion of the grate, absorbs heat in the ash layer, and then enters the oxidation layer, where it undergoes a combustion reaction with the high-temperature carbon, generating large amounts of carbon dioxide and releasing heat, reaching temperatures of 1000-1300°C. Combustion in the oxidation layer is exothermic, and this reaction heat provides the heat source for the reduction reaction, cracking, and drying of the material in the reduction layer.

[0004] However, given the typical operating environment of the oxide layer, this design also presents certain technical challenges. The oxide layer can reach temperatures as high as 1300°C, making it difficult for grates made of commonly used materials to withstand such high temperatures. Long-term use can easily lead to deformation, damage, and seizure of the grates, necessitating frequent replacement. Even the use of high-temperature-resistant alloys can only improve the grate's service life to a certain extent, but cannot completely resolve the problem. This results in frequent grate replacement, increasing the overall operating and maintenance costs of the grate and the gasifier, hindering the popularization and promotion of biomass energy.

[0005] In summary, the oxide layer design of the existing biomass gasifier is not resistant to high temperatures and is easily damaged, resulting in high equipment use costs. Utility Model Content

[0006] The technical problem to be solved by the utility model is that the oxide layer design of the existing biomass gasifier is not resistant to high temperature and is easily damaged, resulting in high equipment use costs.

[0007] In order to solve the above problems, the utility model provides an oxidation rack device for a biomass gasification furnace, comprising a plurality of grate units arranged in parallel at a preset distance, and beams located at both ends of each of the grate units for supporting and fixing the grate units. The grate units are all columnar structures with cavities arranged axially inside. The beams are provided with cooling liquid infusion pipes that connect from the ends to the internal cavities of each grate unit, for introducing cooling liquid into the grate units to cool the grate units. The oxidation rack device for a biomass gasifier in the present invention provides a novel structural design for protecting the grate at high temperatures. The grate units are arranged in parallel in the shape of hollow columns, and the middle cavities of the grate units are connected to the coolant infusion pipe through the end to introduce the coolant into the grate units. The grate units are cooled during use to prevent the temperature of the grate units from being too high to the extent that the structure thereof may be damaged. The use of this design can effectively extend the service life of the oxidation layer grate, reduce the material requirements for the oxidation layer, reduce the use cost of the biomass gasifier, and effectively solve the problem that the oxidation layer design of the existing biomass gasifier is not resistant to high temperatures and is easily damaged, resulting in high equipment use costs.

[0008] As a preferred solution, the cross-section of the grate unit perpendicular to its axial direction is T-shaped, and the arrangement angles of each grate unit are consistent, so as to place the fuel at the end with the larger width of its cross-sectional shape. This design further optimizes the shape of the grate unit, mainly to deal with the problem that the slag is easily stuck in the gap between adjacent grate units when cleaning the slag after combustion is completed. The top larger surface of this T-shaped cross-section is used to carry the fuel, and the gap between the adjacent grate units is smaller at the top and larger at the bottom, which can effectively prevent the slag waste from clogging and filling the gap; in addition, because the bottom of the fuel has a larger air flow space using this design, it can actually increase the contact area between the fuel and the air, making the combustion more complete and the energy utilization rate higher.

[0009] As a preferred solution, the grate units have a triangular cross-section perpendicular to their axial direction, and the grate units are arranged at a consistent angle, positioning the fuel above one side of the triangular cross-section. This design, similar to the aforementioned design principle, offers an alternative grate unit shape alongside the T-shaped cross-section. Similarly, utilizing its triangular cross-section, the gap between adjacent grate units is wider at the bottom, preventing waste clogging and increasing the contact area between the fuel and air.

[0010] As a preferred solution, the cross-section of the grate unit is an isosceles triangle, with the longer side used for fuel placement. This design further optimizes the above-mentioned structural design. The isosceles triangle cross-section is designed for ease of assembly and force balance, avoiding the unnecessary difficulty of carefully identifying the orientation during installation and fixing of the grate unit due to the asymmetrical grate unit shape.

[0011] As a preferred solution, the cooling liquid delivery pipe connected to one end of the grate unit is connected to the liquid inlet pipe, and the cooling liquid delivery pipe connected to the other end of the grate unit is connected to the liquid discharge pipe, which is used to ensure the unidirectional flow of coolant through the grate unit. This design optimizes the inlet and outlet design of the coolant pipes connected to each grate unit. The coolant pipes at one end of all grate units are connected to the liquid inlet pipe, and the other end is connected to the liquid discharge pipe. This ensures the unidirectional flow of coolant through the grate unit, maintaining the coolant flow rate and thus the cooling effect.

[0012] As a preferred solution, the beams are connected to a cleaning assembly for cleaning fuel residue remaining on the upper surfaces of the grate units after combustion. This cleaning assembly discharges the fuel residue downward through the gaps between adjacent grate units. This design further incorporates a cleaning assembly to facilitate the rapid and timely removal of slag and other fuel waste from the top of the grate units after a combustion phase. The waste is discharged directly downward through the gaps between adjacent grate units, ensuring ease of use and enabling rapid and continuous operation of the gasifier.

[0013] As a preferred solution, the cleaning assembly includes a push plate structure arranged perpendicular to the axial direction of the grate unit. The push plate structure is arranged in contact with the upper surface of the grate unit. The push plate structure is connected to a slag pushing drive mechanism that drives it to feed axially along the grate unit. This design provides a preferred cleaning assembly structural design, which mainly includes two parts: a push plate structure and a slag pushing drive mechanism that drives it to feed. The push plate structure is in contact with the upper surface of the grate unit, and the feeding direction is along the axial direction of the grate unit. The drive mechanism outputs linear motion to push the slag to fall downward through the gap between the grate units. This structure is simple and has a good cleaning effect, and can realize automatic drive control.

[0014] As a preferred solution, the slag pushing drive mechanism includes a drive cylinder group, the cylinder feed direction of which is parallel to the axial direction of the grate unit. This design further optimizes the slag pushing drive mechanism in the above design, using a cylinder group to perform linear pushing output, ensuring stable pushing action and facilitating automated control.

[0015] The present invention also provides a biomass gasifier, which includes an oxidation rack device for a biomass gasifier as described in any of the above items. Since the above oxidation rack device has the above beneficial effects, the biomass gasifier equipped with the oxidation rack should also have corresponding effects. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a structural schematic diagram of an oxidation rack device for a biomass gasification furnace provided by the utility model;

[0017] Figure 2 for Figure 1 A schematic cross-sectional structural diagram of a grate unit of an oxidation rack device for a biomass gasification furnace;

[0018] Figure 3 This is a schematic structural diagram of another oxidation rack device for a biomass gasification furnace provided by the present invention;

[0019] Figure 4 for Figure 3 Schematic diagram of the cross-sectional structure of the grate unit of the oxidation rack device used in the biomass gasification furnace.

[0020] in, Figures 1-4 middle:

[0021] 1. Grate unit; 2. Beam frame; 3. Push plate structure; 4. Driving cylinder group. DETAILED DESCRIPTION

[0022] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods.

[0023] Before explaining the working principle of the present invention in detail, the description of the present invention needs to be further explained: In the description of the present invention, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "two ends," "one end," "the other end," and the like, indicating positions or relationships, are based on the positions or relationships shown in the accompanying drawings and are intended only to facilitate the description of the present invention and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limiting the present invention. In addition, 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 expressly specified or limited, the terms "installed," "provided with," "connected," etc. should be understood in a broad sense. For example, "connected" may refer to a fixed connection, a detachable connection, or an integral connection; it may refer to a mechanical connection, a direct connection, an indirect connection via an intermediate medium, or a connection between two components by welding. Those skilled in the art will be able to understand the specific meanings of the above terms in this utility model in specific circumstances.

[0025] refer to Figure 1 、 Figure 2 The following examples are described, Figure 1 This is a structural schematic diagram of an oxidation rack device for a biomass gasification furnace provided by the utility model; Figure 2 for Figure 1 Schematic diagram of the cross-sectional structure of the grate unit of the oxidation rack device used in the biomass gasification furnace.

[0026] An embodiment of the present invention provides an oxidation rack device for a biomass gasification furnace, comprising a plurality of grate units 1 arranged in parallel at a preset distance, and beams 2 located at both ends of each grate unit 1 for supporting and fixing the grate units 1. The grate units 1 are all columnar structures with cavities arranged axially inside. The beams 2 are provided with cooling liquid infusion pipes that connect from the ends to the internal cavities of each grate unit 1, for introducing cooling liquid into the grate units 1 to cool the grate units 1. The oxidation rack device for a biomass gasifier in the present invention provides a novel structural design for protecting the grate at high temperatures. The grate units 1 are arranged in parallel in a hollow column shape, and the middle cavity of each grate unit 1 is connected to a coolant infusion pipe through an end to introduce the coolant into the grate unit 1. The grate unit 1 is cooled during use to prevent the temperature of the grate unit 1 from being too high to a level that may damage its own structure. The use of this design can effectively extend the service life of the oxidation layer grate, reduce the material requirements for the oxidation layer, reduce the use cost of the biomass gasifier, and effectively solve the problem that the oxidation layer design of the existing biomass gasifier is not resistant to high temperatures and is easily damaged, resulting in high equipment use costs.

[0027] In the technical solution provided by this embodiment, the cross-section of the grate unit 1 perpendicular to its axial direction is T-shaped, and the arrangement angle of each grate unit 1 is consistent, which is used to place the fuel at the end with the larger width of its cross-sectional shape. This design further optimizes the shape of the grate unit 1, mainly to deal with the problem that the slag is easily stuck in the gap between adjacent grate units 1 when cleaning the slag after combustion is completed. The top larger surface of this T-shaped cross-section is used to carry the fuel, and the gap between the adjacent grate units 1 is smaller at the top and larger at the bottom, which can effectively prevent the slag waste from clogging and filling the gap; in addition, because the bottom of the fuel has a larger air flow space using this design, it can actually increase the contact area between the fuel and the air, making the combustion more complete and the energy utilization rate higher.

[0028] refer to Figure 3 、 Figure 4 The following examples are described, Figure 3 This is a schematic structural diagram of another oxidation rack device for a biomass gasification furnace provided by the present invention; Figure 4 for Figure 3 Schematic diagram of the cross-sectional structure of the grate unit of the oxidation rack device used in the biomass gasification furnace.

[0029] In the technical solution provided in this embodiment, the cross-section of the grate unit 1 perpendicular to its axial direction is triangular, and each grate unit 1 is arranged at a uniform angle, which is used to place the fuel above one side of the triangular cross-section. This design, similar to the design principle described above, is an alternative grate unit 1 shape design scheme alongside the T-shaped cross-section. Similarly, the triangular cross-sectional structure of the grate unit 1 is used to widen the gap between adjacent grate units 1 at the bottom, preventing waste blockage and increasing the contact area between the fuel and air.

[0030] In the technical solution provided in this embodiment, the cross-section of the grate unit 1 is an isosceles triangle, with the longer side used for fuel placement. This design further optimizes the above-mentioned structural design. The adoption of an isosceles triangle cross-section is primarily for ease of assembly and force balance considerations. It avoids the unnecessary difficulty of carefully identifying the orientation during the installation and fixing process of the grate unit 1 due to the asymmetrical shape of the grate unit 1.

[0031] In the technical solution provided by this embodiment, the cooling liquid delivery pipe connected to one end of the grate unit 1 is connected to the liquid inlet pipe, and the cooling liquid delivery pipe connected to the other end of the grate unit 1 is connected to the liquid discharge pipe, which is used to ensure the unidirectional flow of the coolant flowing through the grate unit 1. This design optimizes the coolant inlet and outlet design of the coolant pipes connected to each grate unit 1. The coolant pipes at one end of all grate units 1 are connected to the liquid inlet pipe, and the other end is connected to the liquid discharge pipe. This ensures the unidirectional flow of coolant through the grate unit 1, maintains the coolant flow rate, and thus ensures the cooling effect.

[0032] In the technical solution provided in this embodiment, the beam 2 is connected to a cleaning assembly for cleaning fuel residue remaining on the upper surface of the grate units 1 after combustion. The cleaning assembly discharges the fuel residue downward through the gaps between adjacent grate units 1. This design further adds a cleaning assembly to facilitate the rapid and timely removal of slag and other fuel waste located on the top of the grate units 1 after a combustion phase. The waste is directly discharged downward through the gaps between adjacent grate units 1, ensuring ease of use and enabling rapid and continuous use of the gasifier.

[0033] In the technical solution provided in this embodiment, the cleaning assembly includes a push plate structure 3 arranged perpendicular to the axial direction of the grate unit 1. The push plate structure 3 is arranged in contact with the upper surface of the grate unit 1. The push plate structure 3 is connected to a slag pushing drive mechanism that drives it to feed axially along the grate unit 1. This design provides a preferred cleaning assembly structural design, which mainly includes two parts: the push plate structure 3 and the slag pushing drive mechanism that drives it to feed. The push plate structure 3 is in contact with the upper surface of the grate unit 1, and the feeding direction is along the axial direction of the grate unit 1. The drive mechanism outputs linear motion to push the slag to fall downward through the gap of the grate unit 1. This structure is simple and has a good cleaning effect, and can realize automatic drive control.

[0034] In the technical solution provided in this embodiment, the slag pushing drive mechanism includes a drive cylinder group 4, the cylinder feed direction of which is parallel to the axial direction of the grate unit 1. This design further optimizes the slag pushing drive mechanism in the above design, selecting a cylinder group to perform linear pushing output, ensuring stable pushing action and facilitating automated control.

[0035] This embodiment also provides a biomass gasifier, which includes an oxidation rack device for a biomass gasifier as described in any of the above embodiments. Since the above oxidation rack device has the above beneficial effects, the biomass gasifier equipped with the oxidation rack should also have corresponding effects.

[0036] Although the disclosure is as described above, the scope of protection of the disclosure is not limited thereto. Those skilled in the art may make various changes and modifications without departing from the spirit and scope of the disclosure, and these changes and modifications will fall within the scope of protection of the utility model.

Claims

1. An oxidation rack device for a biomass gasifier, characterized in that: The invention comprises a plurality of grate units (1) arranged in parallel at a preset distance, and beam frames (2) respectively located at both ends of each of the grate units (1) and used to support and fix the grate units (1); the grate units (1) are all columnar structures with cavities arranged inside along the axial direction; the beam frames (2) are provided with cooling liquid infusion pipes connected from the ends to the internal cavities of each grate unit (1) and used to introduce cooling liquid into the grate units (1) to cool the grate units (1).

2. The oxidation rack device for a biomass gasification furnace according to claim 1, characterized in that: The cross section of the grate unit (1) perpendicular to its axial direction is T-shaped, and the arrangement angles of the grate units (1) are consistent, so as to place the fuel at the end with a larger width of the cross section.

3. The oxidation rack device for a biomass gasification furnace according to claim 2, characterized in that: The cross section of the grate unit (1) perpendicular to its axial direction is triangular, and the arrangement angles of the grate units (1) are consistent, so as to place the fuel above one side of the triangular cross section.

4. The oxidation rack device for a biomass gasification furnace according to claim 3, characterized in that: The cross section of the grate unit (1) is in the shape of an isosceles triangle, and one side of the grate unit with a longer length is used for placing fuel.

5. The oxidation rack device for a biomass gasification furnace according to any one of claims 1 to 4, characterized in that: The cooling liquid infusion pipe connected to one end of the grate unit (1) is connected to the liquid inlet pipeline, and the cooling liquid infusion pipe connected to the other end of the grate unit (1) is connected to the liquid discharge pipeline, so as to ensure the unidirectional movement of the cooling liquid flowing through the grate unit (1).

6. The oxidation rack device for a biomass gasification furnace according to claim 5, characterized in that: The beam frame (2) is connected to a cleaning assembly for cleaning fuel residues remaining on the upper surface of the grate unit (1) after combustion, and the fuel residues are discharged downward through the gaps between adjacent grate units (1) through the cleaning assembly.

7. The oxidation rack device for a biomass gasification furnace according to claim 6, characterized in that: The cleaning assembly comprises a push plate structure (3) arranged perpendicular to the axial direction of the grate unit (1); the push plate structure (3) is arranged in contact with the upper surface of the grate unit (1); and the push plate structure (3) is connected to a slag pushing drive mechanism for driving it to feed axially along the grate unit (1).

8. The oxidation rack device for a biomass gasification furnace according to claim 7, characterized in that: The slag pushing drive mechanism comprises a driving cylinder group (4), and the cylinder feeding direction of the driving cylinder group (4) is parallel to the axial direction of the grate unit (1).

9. A biomass gasifier, characterized in that: The biomass gasifier comprises an oxidation rack device for a biomass gasifier as described in any one of claims 1-8.

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