Circulating fluidized bed rice hull gasification device based on rice hulls
The rice husk gasification device with a circulating fluidized bed design solves the problems of high crushing and mixing costs, uneven gasification, and low gas purity of traditional devices, and achieves efficient and stable rice husk gasification and resource utilization.
Patent Information
- Application Number
- CN202520076429.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-14
- Publication Date
- 2026-01-02
- Estimated Expiration
- 2035-01-14
AI Technical Summary
Traditional rice husk gasification devices require pre-crushing and mixing of combustion aids, resulting in high production costs, uneven gasification, low gas purity, and the inability to recover unburned materials.
The system adopts a circulating fluidized bed design, including a crushed material conduit, a fluidized bed plate, a primary separation chamber, and a secondary separation chamber. This design enables uniform mixing of crushed rice husks and combustion aids, prevents backflow and blockage, and separates incompletely burned materials through centrifugal force, as well as secondary separation of unburned materials.
To reduce production costs, improve gasification efficiency and gas quality, ensure stable gasification reaction, increase the purity of combustible gas, and achieve full utilization of resources.
Smart Images
Figure CN223752689U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to the energy related technical field, concretely relates to a kind of based on the circulation fluidized bed rice hull gasification device of rice hull. BACKGROUND
[0002] In the energy field, the gasification utilization of rice hull has important significance.However, the traditional rice hull gasification device has many problems.
[0003] The previous device needs other equipment to crush and uniformly mix with combustion improver in advance when feeding, which increases production cost and affects the full progress of gasification reaction, resulting in low gasification efficiency and quality.
[0004] The introduction mode of gasification agent in gasification furnace is not uniform enough, which can easily cause uneven reaction, and lack effective anti-backflow measures, resulting in that rice hull powder and combustion improver easily block the air inlet pipe and affect normal operation.
[0005] The separation effect of combustible gas and impurities generated during the gasification process is not good, and the unburned rice hull powder and combustion improver cannot be effectively removed, so that the purity of the produced combustible gas is not high.
[0006] At the same time, the unburned substances cannot be fully recovered and reused, causing resource waste.
[0007] In summary, in order to improve the gasification efficiency and gas production quality of rice hull and realize the full utilization of resources, an innovative circulation fluidized bed rice hull gasification device based on rice hull is needed to solve the problems in the prior art. UTILITY MODEL CONTENTS
[0008] The utility model aims to provide a kind of based on the circulation fluidized bed rice hull gasification device of rice hull, to solve the problem that the traditional rice hull gasification device needs other equipment to crush and uniformly mix with combustion improver in advance in the above background art.
[0009] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: a kind of based on the circulation fluidized bed rice hull gasification device of rice hull, including feed hopper, the lower end of the feed hopper is connected with the broken material guide pipe, the rear end of the broken material guide pipe is connected with the gasification furnace, the lower end center of the gasification furnace is connected with the air inlet pipe, the upper end of the gasification furnace is connected with the secondary separation chamber, and the radius of the secondary separation chamber is greater than the radius of the gasification furnace, the connection between the gasification furnace and the air inlet pipe and the secondary separation chamber is conical, the upper end center of the secondary separation chamber is connected with the guide-out pipe.
[0010] Preferably, the lower end of the gasification furnace is internally provided with a fluidized bed plate, and the fluidized bed plate is located below the broken material guide pipe and at the upper end of the connection between the gasification furnace and the air inlet pipe, a plurality of air guide pipes are communicated with the upper end of the fluidized bed plate.
[0011] Preferably, the upper end of the air guide pipe is fixedly connected with an anti-backflow cover, a plurality of air guide holes are formed in the inner portion of the upper end of the air guide pipe, and the plurality of air guide holes are located at the connecting position of the air guide pipe and the anti-backflow cover and in the inner portion of the anti-backflow cover.
[0012] Preferably, the upper inner wall of the gasification furnace is fixedly connected with a primary separation chamber through a connecting column, and a gap is arranged between the primary separation chamber and the gasification furnace, and the inner portion of the primary separation chamber is fixedly connected with a flow guide separation plate.
[0013] Preferably, the flow guide separation plate is arranged in a spiral shape, a plurality of separation holes are formed in the inner portion of the upper inner wall of the primary separation chamber, and the plurality of separation holes are located between the spiral gaps of the flow guide separation plate.
[0014] Preferably, the lower end of the material guide pipe is fixedly connected with a motor seat, the lower end of the motor seat is fixedly connected with a material crushing motor through a bolt assembly, and the upper end of the material crushing motor is rotatably connected with a vertically upward connecting shaft.
[0015] Preferably, the upper end of the connecting shaft extends into the inner portion of the material guide pipe, and a plurality of movable material crushing blades are fixedly connected to the outer portion of the connecting shaft.
[0016] Preferably, the movable material crushing blades are sleeved on the outer portion of the connecting shaft and are fixedly connected to the inner wall of the material guide pipe, the movable material crushing blades are rotatably connected with the fixed material crushing blades and shear each other, and the two surfaces shearing each other are both arranged in an inclined surface.
[0017] Compared with the prior art, the utility model provides a circulating fluidized bed rice hull gasification device based on rice hull, has the following beneficial effects:
[0018] 1、The utility model discloses a material guide pipe, which can crush rice hull and mix with combustion improver evenly during the feeding process, so that the rice hull and the combustion improver do not need to be treated in advance by other equipment, the production cost is reduced, the motor speed can be adjusted according to the crushing requirement of the rice hull, the rice hull is fully gasified, and the gasification efficiency and quality are improved.
[0019] 2、The fluidized bed plate and the air guide pipe in the gasification furnace are designed to uniformly guide the gasification agent and prevent the rice hull powder and the combustion improver from flowing back and blocking the air inlet pipe, so that the gasification reaction can be stably carried out.
[0020] 3、The primary separation chamber and the spiral flow guide separation plate in the gasification furnace utilize centrifugal force to realize the primary separation of the incompletely burned rice hull powder, the combustion improver and the combustible gas, and improve the gas purity.
[0021] 4、The secondary separation chamber is larger than the gasification furnace, the combustible gas flow rate is reduced, the substances not separated completely are subjected to secondary separation by using gravity and rotating centrifugal force, and the purity of the combustible gas is further improved.
[0022] 5、The unburned rice hull fragments and combustion aids can be refluxed to the lower end of the gasification furnace for combustion reaction multiple times, resource utilization is improved, and waste is reduced.
[0023] 6、The overall device is rationally designed, the components work cooperatively, the gasification treatment of the rice hull is effectively realized, and the gasification effect and gas production quality are improved. BRIEF DESCRIPTION OF DRAWINGS
[0024] Figure 1 It is a three-dimensional structure schematic view of the rice hull gasification device of the utility model.
[0025] Figure 2 It is a three-dimensional sectional structure schematic view of the rice hull gasification device of the utility model.
[0026] Figure 3 It is a three-dimensional sectional structure schematic view of the rice hull gasification device of the utility model. Figure 2 It is an enlarged schematic view of position A in the utility model.
[0027] Figure 4 It is an enlarged schematic view of position B in the utility model. Figure 2 It is an enlarged schematic view of position B in the utility model.
[0028] Figure 5 It is a schematic view of a dynamic crushing blade connecting structure of the utility model.
[0029] In the figure, 1 is a feeding hopper, 2 is a crushing material guide pipe, 3 is a gasification furnace, 4 is an air inlet pipe, 5 is a secondary separation chamber, 6 is a guide pipe, 7 is a fluidized bed plate, 8 is an air guide pipe, 9 is an anti-backflow cover, 10 is an air guide hole, 11 is a primary separation chamber, 12 is a guide separation plate, 13 is a separation hole, 14 is a motor base, 15 is a crushing material motor, 16 is a connecting shaft, 17 is a dynamic crushing blade, and 18 is a fixed crushing blade. DETAILED DESCRIPTION
[0030] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.
[0031] The utility model provides a rice hull gasification device as Figures 1-5The rice hull gasification device based on the rice hull circulating fluidized bed shown in the application comprises a feeding hopper 1, a broken material guide pipe 2 connected to the lower end of the feeding hopper 1, a gasification furnace 3 connected to the rear end of the broken material guide pipe 2, an air inlet pipe 4 connected to the lower end center of the gasification furnace 3, a secondary separation chamber 5 connected to the upper end of the gasification furnace 3, and the radius of the secondary separation chamber 5 is greater than that of the gasification furnace 3, the connection between the gasification furnace 3 and the air inlet pipe 4 and the secondary separation chamber 5 is conical, and the upper end center of the secondary separation chamber 5 is connected to a guide pipe 6. The rice hull and combustion-supporting agent are put into the feeding hopper 1, stirred and mixed evenly through the broken material guide pipe 2, and then introduced into the gasification furnace 3 for combustion reaction. In the process of combustion reaction, the gasification agent is introduced into the gasification furnace 3 through the air inlet pipe 4, and the rice hull broken powder and combustion-supporting agent introduced into the gasification furnace 3 are blown, so that the rice hull broken powder, combustion-supporting agent and gasification agent are fully combusted and reacted, thereby gasifying the rice hull and producing combustible gas. Then the combustible gas is separated from the rice hull broken powder and combustion-supporting agent in the gasification furnace 3 and the secondary separation chamber 5, so that the combustible gas is guided out of the guide pipe 6 and enters the next process, and the unburned rice hull broken powder and combustion-supporting agent return to the lower end of the gasification furnace 3 for combustion reaction again.
[0032] Preferably, the lower end of the broken material guide pipe 2 is fixedly connected to the front side of a motor seat 14, the lower end of the motor seat 14 is fixedly connected to a broken material motor 15 through a bolt assembly, the upper end center of the broken material motor 15 is rotationally connected to a vertically upward connecting shaft 16, the upper end of the connecting shaft 16 extends into the broken material guide pipe 2, a plurality of moving broken material blades 17 are fixedly connected to the outside of the connecting shaft 16, a fixed broken material blade 18 is arranged on the upper end of each moving broken material blade 17, the fixed broken material blade 18 is sleeved on the outside of the connecting shaft 16 and is fixedly connected to the inner wall of the broken material guide pipe 2, the moving broken material blade 17 is rotationally connected to the fixed broken material blade 18 and shears each other, and the two shearing surfaces are both inclined surfaces. After the rice hull and combustion-supporting agent enter the vertical pipeline at the front end of the broken material guide pipe 2, the broken material motor 15 drives the connecting shaft 16 to rotate and drives the plurality of moving broken material blades 17 to rotate through the connecting shaft 16. Since the upper end of each moving broken material blade 17 is provided with a fixed broken material blade 18 that shears each other, the rice hull is crushed under the shearing of the plurality of moving broken material blades 17 and the plurality of fixed broken material blades 18 and is stirred with the combustion-supporting agent under the rotation of the plurality of moving broken material blades 17, and finally introduced into the gasification furnace 3 for combustion reaction, so that the rice hull can be crushed and stirred during the introduction into the gasification furnace 3, and the rotation speed of the connecting shaft 16 and the plurality of moving broken material blades 17 driven by the motor seat 14 can be adjusted according to the crushing degree required by the rice hull, so as to ensure that the rice hull can be fully gasified and improve the gasification efficiency and quality.
[0033] Preferably, the lower end of the gasifier 3 is internally provided with a fluidized bed plate 7, and the fluidized bed plate 7 is located below the crushed material guide pipe 2 and at the upper end of the connection between the gasifier 3 and the gas inlet pipe 4. The upper end of the fluidized bed plate 7 is communicated with a plurality of air guide pipes 8, the upper end of the air guide pipe 8 is fixedly connected with an anti-backflow cover 9, a plurality of air guide holes 10 are formed in the upper end of the air guide pipe 8, and the plurality of air guide holes 10 are located at the connection between the air guide pipe 8 and the anti-backflow cover 9 and inside the anti-backflow cover 9. After the rice hull powder and the combustion-supporting agent enter the inside of the gasifier 3, they fall onto the upper end of the fluidized bed plate 7. The gasification agent is introduced into the inside of the gasifier 3 through the gas inlet pipe 4 and is uniformly introduced into the upper end of the fluidized bed plate 7 through the plurality of air guide pipes 8 and the plurality of air guide holes 10 formed in the air guide pipes 8, blows the rice hull powder and the combustion-supporting agent, and carries out a combustion reaction to generate combustible gas. Since the air guide holes 10 are located at the connection between the air guide pipe 8 and the anti-backflow cover 9 and inside the anti-backflow cover 9, the gasification agent can enter the inside of the gasifier 3 on the upper side of the fluidized bed plate 7 through the plurality of air guide holes 10, while the rice hull powder and the combustion-supporting agent cannot enter the inside of the gasifier 3 on the lower side of the fluidized bed plate 7 through the plurality of air guide holes 10, thereby preventing the gas inlet pipe 4 from being blocked and contaminated.
[0034] Preferably, the upper side of the gasifier 3 is internally provided with a primary separation chamber 11 which is fixedly connected to the gasifier 3 through connecting columns and has a gap with the gasifier 3. The inside of the primary separation chamber 11 is fixedly connected with a flow separation plate 12 which is arranged in a spiral shape. A plurality of separation holes 13 are formed in the upper side of the inner wall of the primary separation chamber 11 and are located between the spiral gaps of the flow separation plate 12. The combustible gas generated by the combustion reaction of the rice hull powder floats upwards and drives the incompletely combusted rice hull powder and combustion-supporting agent to float upwards. At this time, when the incompletely combusted rice hull powder, combustion-supporting agent and combustible gas pass between the primary separation chamber 11 and the flow separation plate 12, the incompletely combusted rice hull powder and combustion-supporting agent move in the flow separation plate 12 in a spiral shape and generate centrifugal force, which drives them to hit the inner wall of the primary separation chamber 11. Then, the incompletely combusted rice hull powder and combustion-supporting agent enter the gap between the gasifier 3 and the primary separation chamber 11 through the plurality of separation holes 13 formed in the upper end of the primary separation chamber 11, thereby being separated from the combustible gas. Finally, the incompletely combusted rice hull powder and combustion-supporting agent are guided back to the upper end of the fluidized bed plate 7 through the gap between the gasifier 3 and the primary separation chamber 11 to carry out a combustion reaction again.
[0035] Preferably, the rice husk powder and combustion-supporting agent that are not separated out inside the gasification furnace 3 enter the secondary separation chamber 5 in a spiral shape and rotate upward inside the secondary separation chamber 5. Since the radius of the secondary separation chamber 5 is larger than the radius of the gasification furnace 3, the combustible gas cannot carry the incompletely combusted rice husk powder and combustion-supporting agent to continue floating upward after the combustible gas enters the secondary separation chamber 5 from the gasification furnace 3. The incompletely combusted rice husk powder and combustion-supporting agent are thrown to the inner wall of the secondary separation chamber 5 under the action of gravity and rotational centrifugal force, slide downward along the inner wall of the secondary separation chamber 5, and are separated from the combustible gas. Finally, the incompletely combusted rice husk powder and combustion-supporting agent are guided back to the upper end of the fluidized bed plate 7 through the gap between the gasification furnace 3 and the primary separation chamber 11 to be combusted again, and the combustible gas is guided out through the guide pipe 6 to be treated in the next process.
[0036] Finally, it should be noted that the above description is only preferred embodiments of the present application and is not intended to limit the present application. Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or equivalently replace some of the technical features, and any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.
Claims
1. A circulating fluidized bed rice husk gasification device based on rice husks, characterized in that, It includes a feeding hopper (1), the lower end of which is connected to a crushing guide pipe (2), the rear end of which is connected to a gasifier (3), the lower center of which is connected to an air inlet pipe (4), the upper end of which is connected to a secondary separation chamber (5), and the radius of the circle of the secondary separation chamber (5) is larger than the radius of the circle of the gasifier (3). The connection between the gasifier (3), the air inlet pipe (4), and the secondary separation chamber (5) is conical. The upper center of the secondary separation chamber (5) is connected to an outlet pipe (6).
2. The circulating fluidized bed rice husk gasification device based on rice husk according to claim 1, characterized in that: The gasifier (3) is provided with a fluidized bed plate (7) at the lower end, and the fluidized bed plate (7) is located below the crushed material guide pipe (2) and above the connection between the gasifier (3) and the air inlet pipe (4). The upper end of the fluidized bed plate (7) is connected to multiple air guide pipes (8).
3. The circulating fluidized bed rice husk gasification device based on rice husk according to claim 2, characterized in that: The upper end of the air guide tube (8) is fixedly connected to the anti-backflow cover (9). Multiple air guide holes (10) are opened inside the upper end of the air guide tube (8), and the multiple air guide holes (10) are located at the connection between the air guide tube (8) and the anti-backflow cover (9), and are located inside the anti-backflow cover (9).
4. The circulating fluidized bed rice husk gasification device based on rice husk according to claim 1, characterized in that: A primary separation chamber (11) is fixedly connected to the upper inner wall of the gasifier (3) by a connecting column, and a gap is provided between the primary separation chamber (11) and the gasifier (3). A flow guide separation plate (12) is fixedly connected inside the primary separation chamber (11).
5. A circulating fluidized bed rice husk gasification device based on rice husks according to claim 4, characterized in that: The flow separation plate (12) is spirally arranged, and multiple separation holes (13) are opened inside the upper inner wall of the primary separation chamber (11), and the multiple separation holes (13) are located between the spiral gaps of the flow separation plate (12).
6. The circulating fluidized bed rice husk gasification device based on rice husk according to claim 1, characterized in that: The lower front end of the crushing guide tube (2) is fixedly connected to a motor base (14), and the lower end of the motor base (14) is fixedly connected to a crushing motor (15) by a bolt assembly. The upper center of the crushing motor (15) is rotatably connected to a vertically upward connecting shaft (16).
7. A circulating fluidized bed rice husk gasification device based on rice husks according to claim 6, characterized in that: The upper end of the connecting shaft (16) extends into the inside of the crushing guide tube (2), and multiple moving crushing blades (17) are fixedly connected to the outside of the connecting shaft (16). Each of the multiple moving crushing blades (17) has a fixed crushing blade (18) at its upper end.
8. A circulating fluidized bed rice husk gasification device based on rice husks according to claim 7, characterized in that: The fixed crushing blade (18) is sleeved on the outside of the connecting shaft (16) and fixedly connected to the inner wall of the crushing guide tube (2). The moving crushing blade (17) is rotatably connected to the fixed crushing blade (18) and shears each other, and both shearing surfaces are set at an angle.