Biomass gasification furnace ash conveying mechanism

Abstract

The utility model discloses a kind of ash conveying mechanism of biomass gasifier, belong to gasification furnace technical field. Including gasification furnace, hopper;Upper scraping component rotation is set in the upper of grate, can simultaneously scrape upper surface of grate and inner wall of gasification furnace, lower scraping component rotation is set in the lower of grate, can simultaneously scrape lower surface of grate and inner wall of hopper;Rotary mechanism that can simultaneously control the rotation of upper scraping component and lower scraping component is set in grate. By setting upper scraping component and lower scraping component, and using double-shaft motor synchronous drive, integrated cleaning of the ash of upper surface and lower surface of grate, inner wall of gasification furnace and inner wall of hopper is realized, ash removal efficiency is significantly improved, and structure is simplified.

Description

Technical Field

[0001] This utility model provides an ash conveying mechanism for a biomass gasifier, belonging to the field of gasifier technology. Background Technology

[0002] A biomass gasifier is a device that converts biomass feedstocks (such as straw and sawdust) into combustible gases through thermochemical conversion. During gasification, the biomass feedstock undergoes drying, pyrolysis, oxidation, and reduction reactions sequentially under oxygen-deficient or oxygen-limited conditions, ultimately transforming into combustible gases primarily composed of CO, H2, and CH4. This technology boasts advantages such as high energy efficiency, low pollution emissions, and a wide range of feedstock sources, and is widely used in heating, power generation, and chemical raw material production. However, during long-term operation, the issue of ash and slag removal becomes a key factor affecting the stability and efficiency of the gasifier.

[0003] Currently, ash and slag cleaning in biomass gasification furnaces faces two main challenges: First, a large amount of ash easily accumulates on the inner walls of the ash hopper and furnace, making cleaning inconvenient. Because ash and slag tend to adhere at high temperatures, traditional cleaning methods often require two sets of power structures to clean the inner walls of the ash hopper and furnace, increasing equipment complexity and energy consumption. Second, excessive ash and slag buildup above the grate can easily cause blockages. Existing technologies often use rotating grates or vibration mechanisms to clean the ash and slag above the grate, but this doesn't adequately disturb the ash and slag below the grate, resulting in an overly dense ash and slag layer, uneven airflow distribution, and reduced gasification efficiency. Furthermore, grate cleaning typically requires a separate drive mechanism, further increasing equipment cost and maintenance difficulty. Therefore, there is an urgent need for a highly efficient, low-energy-consumption ash and slag cleaning solution that can simultaneously clean the inner walls of the ash hopper, the furnace walls, and the areas above and below the grate, in order to improve the long-term operational stability of the gasifier. Utility Model Content

[0004] The technical problem this invention aims to solve is that traditional gasifier ash conveying mechanisms are inconvenient for simultaneously cleaning the ash slag from the inner wall of the ash hopper, the inner wall of the furnace, and the area above and below the grate.

[0005] To solve the above problems, the proposed technical solution is as follows: a biomass gasification furnace ash conveying mechanism, including a support frame, a gasification furnace, and an ash hopper; the gasification furnace is fixedly installed between two support frames, and the ash hopper is fixedly installed at the bottom of the gasification furnace; a screw conveyor for conveying furnace ash is installed below the ash hopper; the upper end of the screw conveyor has an inlet communicating with the ash hopper, and the lower end of the screw conveyor has an outlet; a grate is fixedly installed inside the gasification furnace, and several ash troughs are opened on the grate; further comprising:

[0006] An upper scraping assembly and a lower scraping assembly; the upper scraping assembly, capable of simultaneously scraping the upper surface of the grate and the inner wall of the gasifier, is rotatably mounted above the grate, and the lower scraping assembly, capable of simultaneously scraping the lower surface of the grate and the inner wall of the ash hopper, is rotatably mounted below the grate; a rotating mechanism capable of simultaneously controlling the rotation of the upper and lower scraping assemblies is provided inside the grate.

[0007] Preferably, the upper scraping assembly includes an upper scraper and a first wall scraper; the upper scraper, which can scrape the upper surface of the grate, is rotatably disposed on the upper surface of the grate, and the first wall scraper, which can scrape the inner wall of the gasifier, is fixedly connected to the upper scraper, and the first wall scraper is in contact with the inner wall of the gasifier.

[0008] Preferably, the lower scraping assembly includes a lower scraper and a bucket scraper rod; the lower scraper, which can scrape the lower surface of the grate, is rotatably disposed on the lower surface of the grate, and the bucket scraper rod, which can scrape the inner wall of the ash hopper, is fixedly connected to the upper scraper and is in contact with the inner wall of the ash hopper.

[0009] Preferably, a second wall scraper is fixedly connected below the lower scraper bar, which fits against the inner wall of the gasifier and can scrape the inner wall of the gasifier, and the second wall scraper is fixedly connected to the bucket scraper.

[0010] Preferably, the grate has a motor slot, and the rotating structure is a dual-axis motor with upper and lower output shafts; the dual-axis motor is installed in the motor slot, and the two output shafts of the dual-axis motor are fixedly connected to the upper scraper and the lower scraper, respectively.

[0011] Preferably, the upper scraper and the lower scraper are arranged perpendicular to each other.

[0012] The beneficial effects of this utility model are:

[0013] By setting up upper and lower scraping components and using a dual-axis motor for synchronous drive, integrated cleaning of ash accumulation on the upper and lower surfaces of the grate, the inner wall of the gasifier, and the inner wall of the ash hopper is achieved, significantly improving cleaning efficiency and simplifying the structure. Specifically, the upper scraper and the first wall scraper in the upper scraping component can simultaneously remove ash accumulation on the upper surface of the grate and the adhering material on the inner wall of the gasifier, preventing ash and slag buildup and blockage; the lower scraper, the bucket scraper, and the second wall scraper in the lower scraping component can effectively loosen the ash and slag layer below the grate and scrape off the adhering material on the inner wall of the ash hopper, ensuring uniform airflow distribution. The two sets of scraping components are linked and controlled by the same rotating mechanism, requiring only a single power source to complete all-round cleaning, greatly simplifying the complex design of traditional multi-power structures and reducing equipment energy consumption and maintenance costs. Attached Figure Description

[0014] Figure 1 This is a perspective view of the present invention.

[0015] Figure 2 This is a cross-sectional view of the gasifier of this utility model.

[0016] Figure 3 This is a cross-sectional view of the ash hopper of this utility model.

[0017] Figure 4 This is a cross-sectional view of the grate of this utility model.

[0018] 1. Support frame; 2. Gasifier; 3. Ash hopper; 4. Screw conveyor; 5. Discharge port; 6. Grate; 7. Ash trough; 8. Upper scraper; 9. First wall scraper; 10. Feed inlet; 11. Bucket scraper; 12. Motor slot; 13. Dual-shaft motor; 14. Lower scraper; 15. Second wall scraper. Detailed Implementation

[0019] The present invention will be further described below with reference to the accompanying drawings.

[0020] like Figure 1 , 2 As shown, this utility model provides an ash conveying mechanism for a biomass gasifier: including a support frame 1, a gasifier 2, and an ash hopper 3; the gasifier 2 is fixedly installed between two support frames 1, and the ash hopper 3 is fixedly installed at the bottom of the gasifier 2; a screw conveyor 4 for conveying furnace ash is installed below the ash hopper 3; the upper end of the screw conveyor 4 has an inlet 10 communicating with the ash hopper 3, and the lower end of the screw conveyor 4 has an outlet 5; a grate 6 is fixedly installed inside the gasifier 2, and several ash troughs 7 are opened on the grate 6; since this application is an improvement on the ash conveying mechanism of the gasifier 2, other structures of the gasifier 2 and the specific structure of the screw conveyor 4, which are existing technologies, will not be described in detail here.

[0021] like Figure 3 As shown, an upper scraping assembly capable of simultaneously scraping the upper surface of the grate 6 and the inner wall of the gasifier 2 is rotatably mounted above the grate 6; the upper scraping assembly includes an upper scraper 8 and a first wall scraper 9; the upper scraper 8 capable of scraping the upper surface of the grate 6 is rotatably mounted on the upper surface of the grate 6, and the first wall scraper 9 capable of scraping the inner wall of the gasifier 2 is fixedly connected to the upper scraper 8, and the first wall scraper 9 is in contact with the inner wall of the gasifier 2.

[0022] like Figure 4 As shown, a lower scraping assembly capable of simultaneously scraping the lower surface of the grate 6 and the inner wall of the ash hopper 3 is rotatably disposed below the grate 6; the lower scraping assembly includes a lower scraper 14 and a bucket scraper 11; the lower scraper 14 capable of scraping the lower surface of the grate 6 is rotatably disposed on the lower surface of the grate 6, and the bucket scraper 11 capable of scraping the inner wall of the ash hopper 3 is fixedly connected to the upper scraper 8, and the bucket scraper 11 is in contact with the inner wall of the ash hopper 3.

[0023] A second wall scraper 15 is fixedly connected below the lower scraper 14, which fits against the inner wall of the gasifier 2 and can scrape the inner wall of the gasifier 2. The second wall scraper 15 is fixedly connected to the bucket scraper 11. The second wall scraper 15 not only connects the lower scraper 14 and the bucket scraper 11, but also cleans the inner wall located at the bottom of the gasifier 2.

[0024] like Figure 4 As shown, the grate 6 is equipped with a rotating mechanism capable of simultaneously controlling the rotation of the upper and lower scraping components. A motor slot 12 is provided within the grate 6, and the rotating structure is a dual-shaft motor 13 with upper and lower output shafts. The dual-shaft motor 13 is located within the motor slot 12, and its two output shafts are fixedly connected to the upper scraper 8 and the lower scraper 14, respectively. The upper scraper 8 and the lower scraper 14 are arranged perpendicularly to each other, which greatly reduces the overlap of the two scrapers in the vertical direction, resulting in better cleaning of the upper and lower surfaces of the grate 6.

[0025] The principle of this utility model

[0026] When the biomass gasifier 2 is running, ash and slag gradually accumulate above and below the grate 6 and on the inner wall of the gasifier 2. For example... Figure 4 As shown, after the dual-shaft motor 13 is started, its upper and lower output shafts drive the upper scraping assembly and the lower scraping assembly to rotate synchronously. The upper scraper 8 rotates along the upper surface of the grate 6, scraping the accumulated ash into the ash trough 7 of the grate 6. At the same time, the first wall scraper 9, which is fixedly connected, rotates close to the inner wall of the gasifier 2 to remove the ash adhering to the inner wall. The lower scraper 14 rotates on the lower surface of the grate 6 to loosen the dense ash layer, while the bucket scraper 11 and the second wall scraper 15 connected to it scrape the inner wall of the ash hopper 3 and the lower inner wall of the gasifier 2 respectively to prevent ash from sticking together.

[0027] like Figure 2 , 3 As shown, the cleaned ash falls into the ash hopper 3 through the ash trough 7 and is continuously output by the screw conveyor 4. The entire ash cleaning process requires only a single power drive, with the upper and lower scraping components working in tandem to achieve synchronous cleaning of the upper and lower parts of the grate 6 and the inner wall of the furnace. The scraping intensity can be controlled by adjusting the speed of the dual-shaft motor 13 to adapt to biomass raw materials with different ash properties. This mechanism significantly improves the operating efficiency and stability of the equipment.

[0028] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the inventive spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. A biomass gasifier ash conveying mechanism, comprising a support frame (1), a gasifier (2), and an ash hopper (3); the gasifier (2) is fixedly disposed between two support frames (1), and the ash hopper (3) is fixedly disposed at the bottom of the gasifier (2); a screw conveyor (4) capable of conveying furnace ash is disposed below the ash hopper (3); the upper end of the screw conveyor (4) is provided with a feed inlet (10) communicating with the ash hopper (3), and the lower end of the screw conveyor (4) is provided with a discharge outlet (5); a grate (6) is fixedly disposed inside the gasifier (2), and a plurality of ash troughs (7) are provided on the grate (6); characterized in that, Also includes: An upper scraping assembly and a lower scraping assembly; the upper scraping assembly, which can simultaneously scrape the upper surface of the grate (6) and the inner wall of the gasifier (2), is rotatably disposed above the grate (6), and the lower scraping assembly, which can simultaneously scrape the lower surface of the grate (6) and the inner wall of the ash hopper (3), is rotatably disposed below the grate (6); a rotating mechanism capable of simultaneously controlling the rotation of the upper scraping assembly and the lower scraping assembly is provided inside the grate (6).

2. The ash conveying mechanism for a biomass gasifier according to claim 1, characterized in that: The upper scraping assembly includes an upper scraper (8) and a first wall scraper (9); the upper scraper (8), which can scrape the upper surface of the grate (6), is rotatably disposed on the upper surface of the grate (6), and the first wall scraper (9), which can scrape the inner wall of the gasifier (2), is fixedly connected to the upper scraper (8), and the first wall scraper (9) is in contact with the inner wall of the gasifier (2).

3. The ash conveying mechanism for a biomass gasifier according to claim 2, characterized in that: The lower scraping assembly includes a lower scraper (14) and a bucket scraper (11); the lower scraper (14), which can scrape the lower surface of the grate (6), is rotatably disposed on the lower surface of the grate (6), and the bucket scraper (11), which can scrape the inner wall of the ash hopper (3), is fixedly connected to the upper scraper (8), and the bucket scraper (11) is in contact with the inner wall of the ash hopper (3).

4. The ash conveying mechanism for a biomass gasifier according to claim 3, characterized in that: A second wall scraper (15) is fixedly connected below the lower scraper (14) and fits against the inner wall of the gasifier (2) and can scrape the inner wall of the gasifier (2). The second wall scraper (15) is fixedly connected to the bucket scraper (11).

5. The ash conveying mechanism for a biomass gasifier according to claim 4, characterized in that: The grate (6) has a motor slot (12) and the rotating structure is a dual-axis motor (13) with two output shafts. The dual-axis motor (13) is located in the motor slot (12) and the two output shafts of the dual-axis motor (13) are fixedly connected to the upper scraper (8) and the lower scraper (14) respectively.

6. The ash conveying mechanism for a biomass gasifier according to claim 5, characterized in that: The upper scraper (8) and the lower scraper (14) are arranged perpendicular to each other.

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