Circulating fluidized bed
By designing the mixing mechanism and material conveying mechanism in the circulating fluidized bed, the problem of insufficient mixing ratio and combustion of limestone and coal blocks is solved, and more efficient combustion efficiency and sufficient combustion are achieved.
Patent Information
- Application Number
- CN202323583056.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2023-12-27
- Publication Date
- 2024-12-27
- Estimated Expiration
- 2033-12-27
AI Technical Summary
When transporting limestone and coal blocks, the mixing ratio of existing circulating fluidized beds is difficult to meet the standard requirements, resulting in unsatisfactory desulfurization effect, and limestone and coal blocks are prone to accumulate, resulting in insufficient combustion of materials.
A circulating fluidized bed is designed, including a air cloth plate and an air chamber at the bottom of the furnace, a first and a second stirring mechanism are installed on the support platform, a limestone and coal blocks are mixed through the stirring mechanism, and a material conveying mechanism is used to transfer the limestone and coal blocks. The mixture is laid flat on the bottom of the furnace to ensure full combustion.
Through the design of the mixing mechanism, the mixing ratio of limestone and coal blocks meets the standard, which improves the combustion efficiency. The design of the material conveying mechanism makes the material burn more fully and increases the combustion area.
Smart Images
Figure CN222256525U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of fluidized beds, in particular to a circulating fluidized bed. Background Art
[0002] A circulating fluidized bed is a device that uses airflow through a granular solid layer to keep solid particles in a suspended motion state and perform gas-solid phase reactions. Fluidized beds are widely used in the fields of chemical, pharmaceutical, food, boilers, etc., and are the core equipment for drying, chemical reactions, combustion, granulation, coating and other processes.
[0003] During operation, the circulating fluidized bed will incinerate the materials in the boiler at high temperature, and then transport the solid particles and gases to the separator for separation through the airflow. The solid particles will sink through the return channel connected to the separator and enter the boiler for combustion again, while the gas will enter the flue through the exhaust pipe for subsequent operations. The existing circulating fluidized bed simply transports limestone and coal blocks through their respective pipes to the boiler for incineration during the material transportation process. However, the mixing ratio of limestone and coal blocks cannot fully meet the standard requirements, resulting in unsatisfactory desulfurization effect, which will reduce the utilization rate of the materials. At the same time, during transportation, limestone and coal blocks are also easily accumulated at the bottom of the boiler, so that the materials at the bottom cannot be completely and fully burned.
[0004] Therefore, there is an urgent need to provide a circulating fluidized bed to solve the above problems. Utility Model Content
[0005] The technical problem to be solved by the utility model is that the existing circulating fluidized bed simply transports limestone and coal blocks through their respective pipelines to the boiler for incineration during the material transportation process. However, the mixing ratio of limestone and coal blocks cannot fully meet the standard requirements, resulting in unsatisfactory desulfurization effect. At the same time, during the transportation process, limestone and coal blocks are also easily accumulated at the bottom of the boiler, so that the materials at the bottom cannot be completely and fully burned.
[0006] In order to solve the above technical problems, a technical solution adopted by the utility model is: to provide a circulating fluidized bed, including a furnace, a wind distribution plate is provided at the bottom of the furnace, a wind chamber is connected to the bottom of the wind distribution plate, and a support platform is provided on one side of the furnace;
[0007] A first stirring mechanism is installed on one side of the center of the top of the support platform, and a limestone storage barrel and a coal storage barrel are connected to the top pipeline of the first stirring mechanism;
[0008] A fixing frame is fixedly connected to one side of the top of the support platform, and the limestone storage barrel and the coal storage barrel are both fixedly connected to the fixing frame;
[0009] A conveying trough is provided on the top of the supporting platform, one end of the conveying trough is located below the first stirring mechanism, and the other end is connected to the second stirring mechanism;
[0010] A conveying trough is provided on the top of the support platform, one end of the conveying trough is located at the bottom end of the first stirring mechanism, and a second stirring mechanism is provided on the other side of the top of the support platform;
[0011] A material conveying mechanism is provided between the second stirring mechanism and the furnace;
[0012] A feed pipe is fixedly connected to one side of the furnace outer wall near the top, a separator is fixedly connected to the other end of the feed pipe, a return pipe is fixedly connected to the bottom of the separator, a first ventilation pipe is fixedly connected to one side of the return pipe outer wall, and a first blower is fixedly connected to the other end of the first ventilation pipe;
[0013] A second ventilation pipe is fixedly connected to one side of the outer wall of the air chamber, and a second blower is fixedly connected to the other end of the second ventilation pipe.
[0014] The utility model is further configured as follows: the first stirring mechanism includes a first storage tank arranged on one side of the top of the supporting platform, a first stepper motor is installed in the first storage tank, the top of the output shaft of the first stepper motor is connected to a reducer, the top of the output shaft of the reducer is fixedly connected to a first rotating shaft, a plurality of evenly distributed first stirring blades are fixedly connected to the outer wall of the first rotating shaft, and a mixing tank is fixedly connected to the top of the first storage tank.
[0015] Through the above technical solution, the rotation speed provided by the output shaft of the first stepper motor is too large, and further deceleration is required to reduce the rotation speed of the output shaft of the first stepper motor. After the first stepper motor is energized, the rotation speed of the output shaft of the first stepper motor is reduced by the reducer, and then the output shaft on the reducer drives the first rotating shaft to rotate, and the multiple first stirring blades on the outer wall of the first rotating shaft stir the material entering the mixing tank under the drive of the first rotating shaft.
[0016] The utility model is further configured as follows: the top end of the first rotating shaft passes through the bottom end of the mixing tank and extends toward the inside thereof, and the plurality of first stirring blades are all located inside the mixing tank.
[0017] Through the above technical solution, the first stirring blade is located inside the mixing tank to prevent the material from splashing out and causing unnecessary waste during the stirring process.
[0018] The utility model is further configured as follows: the second stirring mechanism includes a second storage groove opened on the other side of the top of the supporting platform, a second stepper motor is installed at the bottom center of the second storage groove, the top end of the output shaft of the second stepper motor is fixedly connected to a second rotating shaft, and a plurality of evenly distributed second stirring blades are fixedly connected to the outer wall periphery of the second rotating shaft.
[0019] Through the above technical solution, after the second stepper motor at the bottom center of the second storage tank is energized, the output shaft at the top of the second stepper motor drives the second rotating shaft to rotate, and the multiple second stirring blades on the outer wall of the second rotating shaft further stir the incoming material under the drive of the second rotating shaft, and at the same time transport the mixed material to the material conveying mechanism.
[0020] The utility model is further configured as follows: the material conveying mechanism includes a first transport pipeline, a second transport pipeline and a third transport pipeline that penetrate the second storage tank; and the other ends of the first transport pipeline, the second transport pipeline and the third transport pipeline all penetrate and extend into the furnace.
[0021] Through the above technical solution, materials enter the furnace through the first transport pipe, the second transport pipe and the third transport pipe and are discharged at different positions, spreading the materials flat on the bottom of the furnace to facilitate material combustion and enable the materials to burn more fully.
[0022] The utility model is further configured as follows: the separator comprises a cyclone cylinder connected to a feed pipe, and an exhaust pipe is fixedly connected to the top of the cyclone cylinder.
[0023] Through the above technical solution, the material is burned in the furnace, and the generated solid particles and gases enter the separator through the feed pipe for separation, and the separated gas enters the next process through the exhaust pipe on the top of the separator.
[0024] The beneficial effects of the utility model are as follows:
[0025] 1. The utility model mixes and stirs limestone and coal blocks by designing the first stirring mechanism and the second stirring mechanism, so that the mixing ratio of limestone and coal blocks meets the standard requirements, which greatly enhances the combustion efficiency of the materials;
[0026] 2. The utility model conveys the material to different directions of the bottom of the furnace by designing a material conveying mechanism. In this way, the material is spread flat on the bottom of the furnace, increasing the combustion area of the material and making the material burn more fully. BRIEF DESCRIPTION OF THE DRAWINGS
[0027] Figure 1 This is the appearance diagram of the utility model;
[0028] Figure 2 It is a top view of the utility model;
[0029] Figure 3 It is a side view of the utility model;
[0030] Figure 4 It is the front view of the utility model;
[0031] Figure 5 for Figure 2 Middle AA section view;
[0032] Figure 6 for Figure 4 Middle CC section view;
[0033] In the figure: 1, furnace; 2, air distribution plate; 3, wind chamber; 4, supporting platform; 5, limestone storage barrel; 6, coal storage barrel; 7, first stirring mechanism; 701, first storage tank; 702, first rotating shaft; 703, reducer; 704, first stepper motor; 705, first stirring blade; 706, mixing tank; 8, fixing frame; 9, conveying trough; 10, second stirring mechanism; 1001, second storage tank; 1002, second rotating shaft; 1003, second stepper motor; 1004, second stirring blade; 11, material conveying mechanism; 1101, first transport pipeline; 1102, second transport pipeline; 1103, third transport pipeline; 12, feed pipe; 13, separator; 1301, cyclone; 1302, exhaust pipe; 14, return pipe; 15, first ventilation pipe; 16, first blower; 17, second ventilation pipe; 18, second blower. DETAILED DESCRIPTION
[0034] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the protection scope of the present invention.
[0035] See also Figure 1-Figure 6 A circulating fluidized bed comprises a furnace 1, an air distribution plate 2 is arranged at the bottom of the furnace 1, a wind chamber 3 is connected to the bottom of the air distribution plate 2, and a supporting platform 4 is arranged at one side of the furnace 1.
[0036] like Figure 5As shown, a first stirring mechanism 7 is installed on one side of the top center of the support platform 4, and a limestone storage barrel 5 and a coal storage barrel 6 are connected to the top pipeline of the first stirring mechanism 7. The first stirring mechanism 7 includes a first storage tank 701 arranged on one side of the top of the support platform 4, and a first stepper motor 704 is installed in the first storage tank 701. The top of the output shaft of the first stepper motor 704 is connected to a reducer 703, and the top of the output shaft of the reducer 703 is fixedly connected to a first rotating shaft 702, and a plurality of uniformly distributed first stirring blades 705 are fixedly connected to the outer wall of the first rotating shaft 702. A mixing tank 706 is fixedly connected to the top of the first storage tank 701, and the top of the first rotating shaft 702 passes through the bottom end of the mixing tank 706 and extends to the inside thereof, and a plurality of first stirring blades 705 are fixedly connected to the outer wall of the first rotating shaft 702. The mixing blades 705 are all located inside the mixing tank 706. The first stirring blade 705 is located inside the mixing tank 706 to prevent the material from splashing out during the stirring process. The rotation speed provided by the output shaft of the first stepper motor 704 is too large, and further deceleration is required to reduce the rotation speed of the output shaft of the first stepper motor 704. After the first stepper motor 704 is started, the rotation speed of the output shaft of the first stepper motor 704 is further reduced by the reducer 703, and then the output shaft on the reducer 703 drives the first rotating shaft 702 to rotate. The multiple first stirring blades 705 on the outer wall of the first rotating shaft 702 are driven by the first rotating shaft 702 to stir the material entering the mixing tank 706. A discharge port is opened on the outside of the mixing tank 706 to facilitate the outflow of the stirred material.
[0037] like Figure 1 or Figure 4 As shown, a fixing frame 8 is fixedly connected to one side of the top of the support platform 4, and the limestone storage barrel 5 and the coal storage barrel 6 are both fixedly connected to the fixing frame 8. The fixing frame 8 can fix the limestone storage barrel 5 and the coal storage barrel 6 to prevent them from falling off during the material mixing process;
[0038] A conveying trough 9 is provided on the top of the supporting platform 4. One end of the conveying trough 9 is located below the first stirring mechanism 7, and the other end is connected to the second stirring mechanism 10. The conveying trough 9 has a certain angle with the horizontal plane, so that the material can move to the second stirring mechanism 10 under the action of gravity.
[0039] like Figure 2As shown, a conveying groove 9 is provided on the top of the support platform 4, one end of the conveying groove 9 is located at the bottom end of the first stirring mechanism 7, and a second stirring mechanism 10 is provided on the other side of the top of the support platform 4. The second stirring mechanism 10 includes a second storage groove 1001 provided on the other side of the top of the support platform 4, and a second stepper motor 1003 is installed at the bottom center of the second storage groove 1001. The top end of the output shaft of the second stepper motor 1003 is fixedly connected to the second rotating shaft 1002, and a plurality of evenly distributed second stirring blades 1004 are fixedly connected to the outer wall of the second rotating shaft 1002. After the second stepper motor 1003 at the bottom center of the second storage groove 1001 is energized, the output shaft at the top of the second stepper motor 1003 drives the second rotating shaft 1002 to rotate, and the plurality of second stirring blades 1004 on the outer wall of the second rotating shaft 1002 further stir the incoming material under the drive of the second rotating shaft 1002, and at the same time transport the mixed material to the material conveying mechanism 11.
[0040] like Figure 3 or Figure 6 As shown, a material conveying mechanism 11 is arranged between the second stirring mechanism 10 and the furnace 1, and the material conveying mechanism 11 includes a first transport pipe 1101, a second transport pipe 1102 and a third transport pipe 1103 which penetrate the second storage tank 1001; and the other ends of the first transport pipe 1101, the second transport pipe 1102 and the third transport pipe 1103 all penetrate and extend into the furnace 1, and the material enters the furnace 1 through the first transport pipe 1101, the second transport pipe 1102 and the third transport pipe 1103 and is discharged at different positions, spreading the material on the bottom of the furnace 1 to facilitate the combustion of the material so that the material can be burned more fully.
[0041] like Figure 3 As shown, a feed pipe 12 is fixedly connected to one side of the outer wall of the furnace 1 near the top, a separator 13 is fixedly connected to the other end of the feed pipe 12, a return pipe 14 is fixedly connected to the bottom of the separator 13, a first ventilation pipe 15 is fixedly connected to one side of the outer wall of the return pipe 14, and a first blower 16 is fixedly connected to the other end of the first ventilation pipe 15. The material is burned in the furnace 1, and the generated solid particles and gases enter the separator 13 through the feed pipe 12 for separation. The separator 13 includes a cyclone 1301 connected to the feed pipe 12, and an exhaust pipe 1302 is fixedly connected to the top of the cyclone 1301. The separated solid particles will sink into the return pipe 14, and the high-pressure airflow provided by the first blower 16 enters the return pipe 14 through the first ventilation pipe 15 to return the solid particles to the furnace 1 for combustion, and the separated gas enters the next program through the exhaust pipe 1302 at the top of the separator 13.
[0042] A second ventilation pipe 17 is fixedly connected to one side of the outer wall of the wind chamber 3, and a second blower 18 is fixedly connected to the other end of the second ventilation pipe 17. The second blower 18 can provide a stream of high-pressure gas and enter the wind chamber 3 through the second ventilation pipe 17. The high-pressure gas entering the wind chamber 3 generates a high-pressure airflow after passing through the air distribution plate 2 to lift the solid particles and gases in the furnace 1 to the top of the furnace 1.
[0043] When the utility model is in use, the materials inside the limestone storage barrel 5 and the coal storage barrel 6 on the fixed frame 8 are transported to the mixing tank 706 through the pipeline. After the first stepper motor 704 inside the first storage tank 701 on the top side of the support platform 4 is energized, it rotates the first rotating shaft 702 under the deceleration of the reducer 703, thereby driving the multiple first stirring blades 705 on the outer wall of the first rotating shaft 702 to rotate, and stir the materials entering the mixing tank 706. The stirred materials enter the second storage tank 1001 through the conveying trough 9. After the second stepper motor 1003 at the bottom center of the second storage tank 1001 is energized, it drives the second rotating shaft 1002 to rotate, thereby driving the multiple second stirring blades 1004 on the outer wall of the second rotating shaft 1002 to stir the entered materials for the second time. The stirred materials pass through the first transport The pipeline 1101, the second transport pipeline 1102 and the third transport pipeline 1103 enter the furnace 1, and materials are discharged at different positions so that the materials can cover the bottom of the furnace 1. The furnace 1 begins to burn and heat, and the solid particles and gases generated by the combustion of the materials are provided by the second blower 18. A high-pressure gas enters the wind chamber 3 through the second ventilation pipe 17 to provide a high-pressure airflow to the furnace 1 to lift the solid particles and gases to the top of the furnace 1. The generated solid particles and gases enter the separator 13 through the feed pipe 12 for separation, and the separated gas enters the next program through the exhaust pipe 1302 at the top of the separator 13. The solid particles will sink into the return pipe 14, and the high-pressure airflow provided by the first blower 16 enters the return pipe 14 through the first ventilation pipe 15 to return the solid particles to the furnace 1 for combustion.
[0044] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.
Claims
1. A circulating fluidized bed, comprising a furnace (1), characterized in that: An air distribution plate (2) is provided at the bottom of the furnace (1), a wind chamber (3) is connected to the bottom of the air distribution plate (2), and a support platform (4) is provided at one side of the furnace (1); A first stirring mechanism (7) is installed on one side of the center of the top of the support platform (4), and a limestone storage barrel (5) and a coal storage barrel (6) are connected to the top pipeline of the first stirring mechanism (7); A fixing frame (8) is fixedly connected to one side of the top of the support platform (4), and the limestone storage barrel (5) and the coal storage barrel (6) are both fixedly connected to the fixing frame (8); A conveying trough (9) is provided on the top of the support platform (4), one end of the conveying trough (9) is located below the first stirring mechanism (7), and the other end is connected to the second stirring mechanism (10); A conveying trough (9) is provided on the top of the support platform (4), one end of the conveying trough (9) is located at the bottom end of the first stirring mechanism (7), and a second stirring mechanism (10) is provided on the other side of the top of the support platform (4); A material conveying mechanism (11) is provided between the second stirring mechanism (10) and the furnace (1); A feed pipe (12) is fixedly connected to one side of the outer wall of the furnace (1) near the top, a separator (13) is fixedly connected to the other end of the feed pipe (12), a return pipe (14) is fixedly connected to the bottom of the separator (13), a first ventilation pipe (15) is fixedly connected to one side of the outer wall of the return pipe (14), and a first blower (16) is fixedly connected to the other end of the first ventilation pipe (15); A second ventilation pipe (17) is fixedly connected to one side of the outer wall of the air chamber (3), and a second blower (18) is fixedly connected to the other end of the second ventilation pipe (17).
2. A circulating fluidized bed according to claim 1, characterized in that: The first stirring mechanism (7) comprises a first storage tank (701) arranged on one side of the top of the supporting platform (4), a first stepper motor (704) is installed in the first storage tank (701), the top end of the output shaft of the first stepper motor (704) is connected to a reducer (703), the top of the output shaft of the reducer (703) is fixedly connected to a first rotating shaft (702), a plurality of evenly distributed first stirring blades (705) are fixedly connected to the outer wall of the first rotating shaft (702), and a mixing tank (706) is fixedly connected to the top of the first storage tank (701).
3. A circulating fluidized bed according to claim 2, characterized in that: The top end of the first rotating shaft (702) passes through the bottom end of the mixing tank (706) and extends toward the inside thereof, and the plurality of first stirring blades (705) are all located inside the mixing tank (706).
4. A circulating fluidized bed according to claim 1, characterized in that: The second stirring mechanism (10) comprises a second storage groove (1001) opened on the other side of the top of the supporting platform (4); a second stepping motor (1003) is installed at the bottom center of the second storage groove (1001); a second rotating shaft (1002) is fixedly connected to the top end of the output shaft of the second stepping motor (1003); and a plurality of evenly distributed second stirring blades (1004) are fixedly connected to the outer wall of the second rotating shaft (1002).
5. A circulating fluidized bed according to claim 4, characterized in that: The material conveying mechanism (11) comprises a first conveying pipeline (1101), a second conveying pipeline (1102) and a third conveying pipeline (1103) which penetrate the second storage tank (1001).
6. A circulating fluidized bed according to claim 5, characterized in that: The other ends of the first transport pipeline (1101), the second transport pipeline (1102) and the third transport pipeline (1103) all penetrate and extend into the furnace (1).
7. A circulating fluidized bed according to claim 1, characterized in that: The separator (13) comprises a cyclone barrel (1301) connected to the feed pipe (12), and an exhaust pipe (1302) is fixedly connected to the top of the cyclone barrel (1301).