Automatic bundling, distributing, superposing and coupling gasification biomass boiler structure
The combustion process of the biomass boiler is optimized through the double-layer grate structure, and the problem of difficulty in completely burning out the single-layer grate fuel is solved, achieving efficient combustion and low-cost fuel utilization.
Patent Information
- Application Number
- CN202421672602.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-16
- Publication Date
- 2025-08-01
- Estimated Expiration
- 2034-07-16
AI Technical Summary
The single-layer grate design of existing biomass boilers makes it difficult to completely burn out the fuel near the grate and has low combustion efficiency.
The double-layer grate structure is adopted, including an upper fixed water-cooled grate and a lower rotatable chain grate, which is separately carried out the baled ignition, gasification and burnout process. The upper water-cooled grate is used to achieve ignition and preliminary gasification, and the lower grate is deeply burned out, and fuel distribution and heat exchange are optimized through the split membrane wall and S-type flue gas channel.
Improve the combustion efficiency of biomass baled fuel, reduce equipment investment and environmental pollution, and reduce fire protection risks and costs.
Smart Images
Figure CN223178822U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of biomass boilers, and particularly relates to a structure of an automatic bale fabric superposition coupling gasification biomass boiler. Background Art
[0002] A biomass boiler is a thermal energy device that uses biomass as fuel for heating. Biomass includes various plant materials, such as wood, straw, rice bran, wood chips, waste crops, etc. The biomass boiler converts the thermal energy generated by the combustion of biomass into steam or hot water for heating, power generation or other industrial processes. The boiler adopts the most suitable combustion equipment for biomass fuel combustion - a chain grate (inverted type). A normal stoker biomass boiler is an up-fired single-layer grate, and it is difficult for the fuel near the grate to burn out, resulting in low combustion efficiency of the boiler. Content of the Utility Model
[0003] The purpose of the utility model is to provide a structure of an automatic bale fabric superposition coupling gasification biomass boiler to solve the problem that in the normal stoker biomass boiler mentioned in the above background art, it is an up-fired single-layer grate, and it is difficult for the fuel near the grate to burn out, resulting in low combustion efficiency of the boiler.
[0004] To achieve the above purpose, the utility model provides the following technical solution: A structure of an automatic bale fabric superposition coupling gasification biomass boiler, including a furnace body. The lower half of the interior of the furnace body is provided with a combustion chamber, and the upper half of the interior of the furnace body is provided with a heat exchange chamber. At a position on the left side of the furnace body corresponding to the upper end of the combustion chamber, there is a feeding port. At a position inside the combustion chamber corresponding to the feeding port on the left side, there is an upper water-cooled grate. At the lower end of the combustion chamber, there is a rotating grate. Above the rotating grate at the lower end of the combustion chamber, there is a horizontal grate. At a position on the upper right side inside the combustion chamber corresponding to the feeding port, there is a smoke outlet window. Between the horizontal grate and the smoke outlet window, there is a partition membrane wall. On the right side inside the heat exchange chamber, there is an S-shaped flue gas channel. At the lower end of the S-shaped flue gas channel, there is an ash hopper. The inner surfaces of the combustion chamber and the heat exchange chamber are both provided with tube bundle membrane walls. At the upper right end of the furnace body, there is a flue gas outlet connected to the S-shaped flue gas channel.
[0005] Preferably, above the upper water-cooled grate inside the combustion chamber, there is an upper combustion zone. Below the upper water-cooled grate inside the combustion chamber, there is a gasification zone. Between the gasification zone and the rotating grate inside the combustion chamber, there is a lower combustion zone. On the left side of the partition membrane wall, there is a front flue gas channel. On the right side of the partition membrane wall, there is a rear flue gas channel.
[0006] Preferably, a feed push plate is provided at a position corresponding to the left side of the furnace body and opposite to the feed inlet. A slideway is provided above the feed push plate. The feed push plate is slidably connected to the slideway through a pulley. A hydraulic rod is provided on the left side of the feed push plate.
[0007] Preferably, the left end of the upper water-cooled grate is higher than the right end. The cross-section of the upper water-cooled grate in the left-right direction is an arc structure. A limiting grate is connected and communicated below the right end of the upper water-cooled grate.
[0008] Preferably, the upper water-cooled grate, the horizontal grate, the smoke outlet window, the partition membrane wall and the tube bundle membrane wall are connected and communicated with each other.
[0009] Preferably, a partition throat is provided between the combustion chamber and the heat exchange chamber.
[0010] Compared with the prior art, the beneficial effects of the present utility model are as follows: The present utility model adopts a double-layer grate structure. The upper part is a fixed water-cooled grate, and the lower part is a rotatable crossbeam (chain) grate. The ignition, gasification, combustion, and burnout of the bales are carried out separately. The upper grate realizes ignition and preliminary gasification. The upper water-cooled grate with a one-drag-two function is not only a part of the boiler heating surface but also undertakes the functions of igniting the bale fuel, breaking the bale, and distributing the fuel to the lower grate. From the cross-section of the boiler, it is high in the middle and low at both ends, which can realize uniform cloth feeding to the lower grate. The fuel is automatically unpacked and falls onto the lower grate, where deep gasification and ignition burnout are realized. A relatively closed fuel stacking space is established between the upper and lower grates. The fuel falling from the upper grate undergoes pyrolysis gasification and further combustion, greatly improving the combustion efficiency of the biomass bale fuel and solving the problems of large floor area for fuel crushing outside the furnace, serious environmental pollution, high fire protection investment, large equipment investment, and high cost in the conventional bale boiler. BRIEF DESCRIPTION OF THE DRAWINGS
[0011] Figure 1 is the front view schematic diagram of the main structure of the present utility model;
[0012] Figure 2 is the left view schematic diagram of the main structure of the present utility model;
[0013] Figure 3 is the left view schematic diagram of the structure of the upper water-cooled grate of the present utility model.
[0014] In the figure: 1 - furnace body, 2 - combustion chamber, 3 - heat exchange chamber, 4 - feed inlet, 5 - upper water-cooled grate, 6 - rotating grate, 7 - horizontal grate, 8 - smoke outlet window, 9 - dividing membrane wall, 10 - S-shaped flue gas channel, 11 - ash hopper, 12 - tube bundle membrane wall, 13 - upper combustion zone, 14 - gasification zone, 15 - lower combustion zone, 16 - front flue gas channel, 17 - rear flue gas channel, 18 - feed push plate, 19 - slideway, 20 - hydraulic rod, 21 - limiting grate, 22 - flue gas outlet, 23 - dividing throat. Specific embodiments
[0015] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.
[0016] Please refer to Figures 1-3 , the present invention provides a structure of an automatic bundling fabric superposition coupling gasification biomass boiler, including a furnace body 1. A combustion chamber 2 is provided in the lower half of the interior of the furnace body 1. A heat exchange chamber 3 is provided in the upper half of the interior of the furnace body 1. A feed inlet 4 is provided on the left side of the furnace body 1 and corresponding to the upper end of the combustion chamber 2. An upper water-cooled grate 5 is provided inside the combustion chamber 2 on the left side and corresponding to the feed inlet 4. A rotating grate 6 is provided at the lower end of the interior of the combustion chamber 2. A horizontal grate 7 is provided at the lower end of the interior of the combustion chamber 2 and above the rotating grate 6. A smoke outlet window 8 is provided on the upper right side of the interior of the combustion chamber 2 and corresponding to the feed inlet 4. A dividing membrane wall 9 is provided between the horizontal grate 7 and the smoke outlet window 8. An S-shaped flue gas channel 10 is provided on the right side of the interior of the heat exchange chamber 3. An ash hopper 11 is provided at the lower end of the S-shaped flue gas channel 10. Tube bundle membrane walls 12 are provided on the inner surfaces of the combustion chamber 2 and the heat exchange chamber 3. A flue gas outlet 22 is connected and communicated with the S-shaped flue gas channel 10 at the upper right side of the furnace body 1.
[0017] In use, the biomass fuel bale is input into the interior of the furnace body 1 through the feed inlet 4. The bale is first input into the interior of the combustion chamber 2. The bale catches fire and unpacks at the upper end of the upper water-cooled grate 5. The combustion heat is exchanged into filtration heat through the tube bundle membrane wall 12. The fuel is automatically unpacked and falls between the upper water-cooled grates 5. The uncompleted gasified fuel falls to the position of the lower combustion zone 15 on the rotating grate 6. A horizontal grate 7 is arranged at the upper end of the rotating grate 6. The bale on the rotating grate 6 is leveled by the horizontal grate 7. A dividing membrane wall 9 is arranged inside the combustion chamber 2. A smoke outlet window 8 is arranged at the upper end of the dividing membrane wall 9. The dividing membrane wall 9 is fixed by the smoke outlet window 8 and the horizontal grate 7. The combustion chamber 2 is divided into two front and rear combustion chambers by the dividing membrane wall 9. The uncompleted burned bale on the rotating grate 6 is input to the right side of the dividing membrane wall 9 and continues to burn on the right side of the dividing membrane wall 9. The combustion heat is exchanged into the heat of the boiler through the dividing membrane wall 9. The flue gas enters the interior of the heat exchange chamber 3. An S-shaped flue gas passage 10 is arranged inside the heat exchange chamber 3. A tube bundle membrane wall 12 is arranged inside the S-shaped flue gas passage 10. The flue gas circulates back and forth inside the S-shaped flue gas passage 10. The heat of the flue gas is exchanged into the heat of the boiler through the tube bundle membrane wall 12. The ash inside the S-shaped flue gas passage 10 falls into the ash hopper 11 and is output externally. The flue gas that has completed heat exchange is output externally through the flue gas outlet 22.
[0018] An upper combustion zone 13 is arranged inside the combustion chamber 2 and above the upper water-cooled grate 5. The fuel above the upper water-cooled grate 5 burns at the position of the upper combustion zone 13, unpacks and falls downward through the upper water-cooled grate 5. A gasification zone 14 is arranged inside the combustion chamber 2 and below the upper water-cooled grate 5. The fallen fuel falls to the position of the gasification zone 14 and is gasified by heating. A lower combustion zone 15 is arranged inside the combustion chamber 2 between the gasification zone 14 and the rotating grate 6. The uncompleted gasified fuel falls to the position of the lower combustion zone 15 and continues to burn. A front flue gas passage 16 is arranged on the left side of the dividing membrane wall 9. The flue gas generated by the combustion in the lower combustion zone 15 is output upward through the front flue gas passage 16. A rear flue gas passage 17 is arranged on the right side of the dividing membrane wall 9. The flue gas generated by the combustion of the fuel transported by the rotating grate 6 to the right side of the dividing membrane wall 9 is output upward through the rear flue gas passage 17.
[0019] A feed push plate 18 is arranged at the position corresponding to the feed inlet 4 on the left side of the furnace body 1. A slideway 19 is arranged above the feed push plate 18. The feed push plate 18 is slidably connected to the slideway 19 through a pulley. A hydraulic rod 20 is arranged on the left side of the feed push plate 18. The feed push plate 18 is driven by the hydraulic rod 20 to move under the support of the slideway 19, so as to drive the biomass bale to be output into and input from the interior of the furnace body 1.
[0020] The left end of the upper water-cooled grate 5 is higher than the right end, and the cross-section of the upper water-cooled grate 5 in the left-right direction is an arc structure. The upper water-cooled grate 5 designed with an arc structure ensures that the dropped fuel can be evenly dispersed onto the rotating grate 6. A limiting grate 21 is connected and communicated below the right end of the upper water-cooled grate 5. The limiting grate 21 limits the bale that has not been unpacked and slides down from the right side of the upper water-cooled grate 5, so that the bale is stuck between the limiting grate 21 and the dividing membrane wall 9 and continues to be heated to complete unpacking.
[0021] The upper water-cooled grate 5, the horizontal grate 7, the smoke outlet window 8, the dividing membrane wall 9 and the tube bundle membrane wall 10 are connected and communicated with each other. By connecting the upper water-cooled grate 5, the horizontal grate 7, the smoke outlet window 8, the dividing membrane wall 9 and the tube bundle membrane wall 10 in communication, it is ensured that the heat generated at each position inside the furnace body 1 can be converted into the heat of the boiler water through heat exchange, and the heat generated at each position inside the furnace body 1 is centrally collected.
[0022] A dividing throat 23 is provided between the combustion chamber 2 and the heat exchange chamber 3. By setting the dividing throat 23, the furnace body 1 is divided into the combustion chamber 2 and the heat exchange chamber 3, and the flue gas generated inside the combustion chamber 2 is input into the inside of the heat exchange chamber 3 through the dividing throat 23.
[0023] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. An automatic bundling fabric superposition coupling gasification biomass boiler structure, characterized in that: It includes a furnace body (1). In the lower half of the interior of the furnace body (1), there is a combustion chamber (2). In the upper half of the interior of the furnace body (1), there is a heat exchange chamber (3). On the left side of the furnace body (1) and at the position corresponding to the upper end of the combustion chamber (2), there is a feed inlet (4). Inside the combustion chamber (2) and at the position on the left side corresponding to the feed inlet (4), there is an upper water-cooled grate (5). At the lower end of the interior of the combustion chamber (2), there is a rotating grate (6). Above the rotating grate (6) at the lower end of the interior of the combustion chamber (2), there is a horizontal grate (7). At the upper right side of the interior of the combustion chamber (2) and at the position corresponding to the feed inlet (4), there is a smoke outlet window (8). Between the horizontal grate (7) and the smoke outlet window (8), there is a partition membrane wall (9). Inside the heat exchange chamber (3) on the right side, there is an S-shaped flue gas channel (10). At the lower end of the S-shaped flue gas channel (10), there is an ash hopper (11). On the inner surfaces of both the combustion chamber (2) and the heat exchange chamber (3), there are tube bundle membrane walls (12). At the upper right side of the furnace body (1) and communicating with the S-shaped flue gas channel (10), there is a flue gas outlet (22).
2. The structure of an automatic bundling fabric superposition coupling gasification biomass boiler according to claim 1, characterized in that: Inside the combustion chamber (2) and above the upper water-cooled grate (5), there is an upper combustion zone (13). Inside the combustion chamber (2) and below the upper water-cooled grate (5), there is a gasification zone (14). Inside the combustion chamber (2) and between the gasification zone (14) and the rotating grate (6), there is a lower combustion zone (15). On the left side of the partition membrane wall (9), there is a front flue gas channel (16). On the right side of the partition membrane wall (9), there is a rear flue gas channel (17).
3. An automatic bundling fabric superposition coupling gasification biomass boiler structure according to claim 1, characterized in that: At the position on the left side of the furnace body (1) corresponding to the feed inlet (4), there is a feed push plate (18). Above the feed push plate (18), there is a slideway (19). The feed push plate (18) is slidably connected to the slideway (19) through a pulley. On the left side of the feed push plate (18), there is a hydraulic rod (20).
4. An automatic strapping fabric superposition coupling gasification biomass boiler structure according to claim 1, characterized in that: The left end of the upper water-cooled grate (5) is higher than the right end. The cross-section of the upper water-cooled grate (5) in the left-right direction is an arc structure. Below the right end of the upper water-cooled grate (5), there is a connecting limit grate (21).
5. The structure of an automatic strapping fabric superposition-coupled gasification biomass boiler according to claim 1, wherein: The upper water-cooled grate (5), the horizontal grate (7), the smoke outlet window (8), the partition membrane wall (9), and the tube bundle membrane wall (G10) are connected in communication.
6. The structure of an automatic strapping fabric superposition-coupled gasification biomass boiler according to claim 1, characterized in that: There is a partition throat (23) between the combustion chamber (2) and the heat exchange chamber (3).