Tail gas dust removal device for circulating fluidized bed boiler

Abstract

The utility model relates to a circulating fluidized bed boiler tail gas dust removal device, and relates to the technical field of circulating fluidized bed boilers, the circulating fluidized bed boiler tail gas dust removal device comprises a tail gas pipe, a mounting frame is arranged in the tail gas pipe, a filter screen is fixedly arranged in the mounting frame, a sliding hole is formed in the bottom of the tail gas pipe in a penetrating mode, and the mounting frame is in sliding fit with the sliding hole; a connecting sleeve is arranged at the bottom of the tail gas pipe, the top of the connecting sleeve is fixedly connected with the bottom of the tail gas pipe, the sliding hole is located in the connecting sleeve, and a sliding assembly is arranged on the connecting sleeve and used for driving the mounting frame to vertically slide; a cleaning sleeve shell is fixedly connected to the bottom of the connecting sleeve in a butt joint mode, a supporting frame is fixedly arranged in the cleaning sleeve shell, and a cleaning disc is rotationally arranged on the supporting frame. Brush cloth is arranged on the outer end face of the cleaning disc and can abut against the filter screen. The device has the advantages that the filter screen can be conveniently cleaned, the filtering capacity of the filter screen is guaranteed, and manpower consumption is reduced.

Description

Technical Field

[0001] The present application relates to the technical field of circulating fluidized bed boilers, and in particular to a circulating fluidized bed boiler tail gas dust removal device. Background Art

[0002] In the circulating fluidized bed boiler exhaust gas treatment technology, the filter is used to remove smoke and dust from the exhaust gas. However, during use, the filter mesh is easily blocked by smoke and dust impurities, affecting the filtering capacity.

[0003] The existing technology uses manual regular cleaning of the filter, which has the problems of low cleaning efficiency and high labor intensity. Moreover, manual cleaning can only remove surface impurities and cannot penetrate deep into the filter pores, resulting in repeated filter clogging problems.

[0004] Therefore, there is a need for a circulating fluidized bed boiler tail gas dust removal device that can automatically clean the filter screen and achieve deep cleaning of the filter holes. Utility Model Content

[0005] In order to facilitate the cleaning of the filter, ensure the filtering capacity of the filter, and reduce manpower consumption, the present application provides a circulating fluidized bed boiler exhaust gas dust removal device.

[0006] The present application provides a circulating fluidized bed boiler tail gas dust removal device that adopts the following technical solution:

[0007] A circulating fluidized bed boiler exhaust gas dust removal device comprises an exhaust pipe, a mounting frame is provided in the exhaust pipe, a filter screen is fixedly provided in the mounting frame, a sliding hole is opened through the bottom of the exhaust pipe, the mounting frame slides with the sliding hole, a connecting sleeve is provided at the bottom of the exhaust pipe, the top of the connecting sleeve is fixedly connected to the bottom of the exhaust pipe, the sliding hole is located in the connecting sleeve, a sliding assembly is provided on the connecting sleeve, and the sliding assembly is used to drive the mounting frame to slide vertically; a cleaning sleeve is fixedly docked with a cleaning sleeve at the bottom, a support frame is fixedly provided in the cleaning sleeve, and a cleaning disc is rotatably provided on the support frame; a brush cloth is provided on the outer end surface of the cleaning disc, the brush cloth can be abutted against the filter screen, and a cleaning motor for driving the cleaning disc to rotate is provided on the cleaning sleeve.

[0008] By adopting the above technical solution, when the filter needs to be cleaned, the sliding assembly is started to drive the mounting frame to slide vertically downward along the sliding hole, so that the filter enters the cleaning sleeve, and then the cleaning motor is started to drive the cleaning disk to rotate. The brush cloth on the cleaning disk contacts the filter and cleans the filter, cleaning the smoke and dust impurities on the filter, realizing automatic cleaning of the filter, ensuring the filtering capacity of the filter, eliminating the need for manual regular cleaning of the filter, and reducing manpower consumption; when filtering the exhaust gas normally, the sliding assembly is started to drive the mounting frame to slide vertically upward along the sliding hole, and the mounting frame is located in the exhaust pipe, which does not affect the normal filtering and treatment process of the exhaust gas; such a design improves the practicality and convenience of the device, and effectively solves the problem in the prior art that the filter is easily clogged and requires manual cleaning.

[0009] Preferably, the number of the mounting frames and the number of the sliding holes are both two, wherein one mounting frame is slidably matched with one of the sliding holes and is located in the exhaust pipe, and the other mounting frame is slidably matched with the other sliding hole and is located in the cleaning housing.

[0010] By adopting the above technical solution, two mounting frames and sliding holes are set, one of the mounting frames normally performs exhaust gas filtering work in the exhaust pipe, and the other mounting frame is located in the cleaning sleeve for cleaning or standby. When the working mounting frame needs to be cleaned, it can be quickly moved to the cleaning sleeve for cleaning through the sliding assembly. At the same time, the mounting frame that was originally cleaned or on standby in the cleaning sleeve is moved to the exhaust pipe to continue the filtering work, thereby realizing uninterrupted filter cleaning and exhaust gas filtration, improving the working efficiency and continuity of the device, reducing the idle period of exhaust gas treatment caused by filter cleaning, and further improving the practicality and reliability of the device.

[0011] Preferably, the sliding assembly includes a gear, a rack, and a drive motor. The gear is rotatably arranged in the connecting sleeve, and the rack is fixedly arranged on the inner side of the mounting frame. One side of the gear is engaged with one of the racks, and the other side of the gear is engaged with the other rack. The drive motor is used to drive the gear to rotate.

[0012] By adopting the above technical solution, when it is necessary to drive the mounting frame to slide, the drive motor is started, and the drive motor drives the gear to rotate. Since the gear is engaged with the two racks respectively, the rotation of the gear will drive the two racks to move in opposite directions, thereby realizing the synchronous reverse sliding of the two mounting frames in the exhaust pipe and the cleaning sleeve, making the whole process smoother and more efficient. Moreover, through the transmission method of the gear rack, the moving position and speed of the mounting frame can be accurately controlled to ensure the stable operation and good working effect of the device.

[0013] Preferably, an embedded groove is provided on the side wall of the mounting frame, the rack is located in the embedded groove, and the gear extends into the embedded groove to engage with the rack.

[0014] By adopting the above technical solution, the rack is set in the embedded groove, making the structure more compact and reducing space occupancy. At the same time, it also provides a certain degree of protection for the rack, further improving the reliability and safety of the sliding assembly, and ensuring the normal and efficient operation of the entire exhaust dust removal device.

[0015] Preferably, the drive motor is fixedly arranged on the outer wall of the connecting sleeve, passes through the connecting sleeve and is fixedly connected to the gear, and the drive motor is a servo motor.

[0016] By adopting the above technical solution, the drive motor is fixed on the outer wall of the connecting sleeve, which makes rational use of space and makes the overall structure more stable. The drive motor is located outside the connecting sleeve to facilitate heat dissipation. The drive motor passes through the connecting sleeve and is fixedly connected to the gear, which can directly and effectively transmit power to the gear, thereby realizing precise control of the installation frame. The servo motor is adopted, which has the advantages of high control accuracy and fast response speed, and can better realize precise control of the moving speed and position of the installation frame, ensuring the accuracy and timeliness of the action during the filter switching and cleaning process, and further improving the performance and work quality of the device.

[0017] Preferably, two cleaning discs are provided, and the two cleaning discs are coaxially fixed, the brush cloth on one cleaning disc can be pressed against the filter screen on one mounting frame, and the brush cloth on the other cleaning disc can be pressed against the filter screen on the other mounting frame.

[0018] By adopting the above technical solution, two cleaning discs are set up and correspond to the filter screens on the two mounting frames respectively. When the two mounting frames work alternately, the corresponding cleaning discs can clean the corresponding filter screens in a timely and effective manner, ensuring the timeliness and comprehensiveness of the filter screen cleaning, and further enhancing the working effect and operation continuity of the device.

[0019] Preferably, a driven pulley is coaxially fixed on the cleaning disc, a driving pulley is rotatably provided on the bottom side of the support frame, a transmission belt is provided for transmission between the driven pulley and the driving pulley, one side of the transmission belt is sleeved on the driven pulley, and the other side of the transmission belt is sleeved on the driving pulley, the cleaning motor is fixedly provided on the outer wall of the cleaning sleeve, a transmission shaft is provided between the cleaning motor and the driving pulley, the driving pulley is fixedly connected to one end of the transmission shaft, and the driving shaft of the cleaning motor passes through the side wall of the cleaning sleeve and is fixedly connected to the other end of the transmission shaft.

[0020] By adopting the above technical solution, when the cleaning motor is working, the driving pulley is driven to rotate by the transmission shaft, and the driving pulley drives the driven pulley to rotate through the transmission belt, so that the cleaning disc rotates synchronously to clean the filter. This transmission method has a relatively simple structure and stable and reliable operation, which can ensure that the cleaning disc can continuously and effectively perform cleaning work. At the same time, the cleaning motor is arranged on the outer wall of the cleaning sleeve, which is convenient for maintenance and inspection, and does not occupy too much space inside the cleaning sleeve, which is convenient for the heat dissipation of the cleaning motor.

[0021] Preferably, the cleaning sleeve and the connecting sleeve are fixed by fixing bolts.

[0022] By adopting the above technical solution, the cleaning sleeve and the connecting sleeve are fixed with fixing bolts, so that the connection between the two is firm and reliable. When the components in the cleaning sleeve need to be inspected or maintained, it is also convenient to separate the cleaning sleeve and the connecting sleeve by removing the fixing bolts. The operation is simple and quick, which is conducive to improving the maintainability and ease of use of the device.

[0023] In summary, this application includes at least one of the following beneficial technical effects:

[0024] 1. By setting up the installation frame, filter screen, sliding hole, connecting sleeve, sliding assembly, cleaning shell, support frame, cleaning plate and brush cloth, the filter screen can be automatically cleaned, ensuring the filtering capacity of the filter screen and reducing manpower consumption;

[0025] 2. By setting up gears, racks, drive motors, and embedded slots, it is easy to control the alternating use of the two mounting frames, realizing the simultaneous cleaning of the filter and filtering of smoke and dust, thus improving work efficiency and continuity;

[0026] 3. By arranging a driven pulley, a driving pulley, a transmission belt, and a transmission shaft, the torque output by the cleaning motor is reliably transmitted to the cleaning disk, so that the cleaning motor can be arranged outside the cleaning housing, which is convenient for the cleaning motor to dissipate heat and reduce the space occupied inside the cleaning housing. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a structural schematic diagram of a circulating fluidized bed boiler tail gas dust removal device provided in an embodiment of the present application.

[0028] Figure 2 It is a schematic cross-sectional structural diagram of a circulating fluidized bed boiler tail gas dust removal device provided in an embodiment of the present application.

[0029] Figure 3 This is a schematic cross-sectional structural diagram of the position of the sliding component on a circulating fluidized bed boiler exhaust gas dust removal device provided in an embodiment of the present application.

[0030] Explanation of the accompanying drawings: 1. Exhaust pipe; 11. Mounting frame; 111. Filter screen; 112. Embedded groove; 12. Sliding hole; 13. Connecting sleeve; 2. Cleaning sleeve; 21. Support frame; 211. Driving pulley; 22. Cleaning disc; 222. Driven pulley; 23. Transmission belt; 24. Cleaning motor; 241. Transmission shaft; 25. Fixing bolt; 3. Sliding assembly; 31. Gear; 32. Rack; 33. Drive motor. DETAILED DESCRIPTION

[0031] The following is combined with Figure 1-3 This application is described in further detail.

[0032] The present application discloses a circulating fluidized bed boiler tail gas dust removal device. Figure 1 and Figure 2 The exhaust pipe 1 includes a filter 111, a heating wire, and a delivery pipe. Two sliding holes 12 are provided through the bottom of the exhaust pipe 1. Each sliding hole 12 contains a mounting frame 11 that slides vertically. One mounting frame 11 is located within the exhaust pipe 1, while the other is located within the cleaning housing 2. A filter 111 is provided on each mounting frame 11.

[0033] Reference Figure 2 and Figure 3 A connecting sleeve 13 is provided at the bottom of the exhaust pipe 1. The top of the connecting sleeve 13 is fixedly welded to the bottom of the exhaust pipe 1 as a whole, and the sliding hole 12 is located in the connecting sleeve 13. A sliding assembly 3 is provided on the connecting sleeve 13, and the sliding assembly 3 is used to drive the mounting frame 11 to slide vertically. A cleaning sleeve 2 is fixedly docked at the bottom of the connecting sleeve 13, and the cleaning sleeve 2 and the connecting sleeve 13 are fixed by fixing bolts 25. A supporting frame 21 is fixedly provided in the cleaning sleeve 2, and a cleaning disc 22 is rotatably provided on the top of the supporting frame 21; a brush cloth is provided on the outer end surface of the cleaning disc 22, and the brush cloth can be abutted against the filter screen 111. A cleaning motor 24 for driving the cleaning disc 22 to rotate is provided on the cleaning sleeve 2.

[0034] Reference Figure 2 and Figure 3 When filter 111 needs to be cleaned, the sliding assembly 3 drives the mounting frame 11 to slide vertically, lowering filter 111 into the cleaning housing 2. The cleaning motor 24 drives the cleaning disc 22 to rotate, and the brush on the outer end wall of the cleaning disc 22 cleans filter 111. This ensures the filtering capacity of filter 111 and eliminates the need for regular manual cleaning, significantly reducing labor consumption. During normal exhaust gas filtering, the mounting frame 11 moves upward into the exhaust pipe 1 without affecting the exhaust gas treatment process.

[0035] In order to facilitate the sliding of the mounting frame 11, refer to Figure 2 and Figure 3The sliding assembly 3 includes a gear 31, a rack 32, and a drive motor 33. An embedded groove 112 is provided on the side of the mounting frame 11, and the rack 32 is fixedly arranged in the embedded groove 112. The gear 31 is rotatably arranged in the connecting sleeve 13, and the gear 31 extends into the embedded groove 112. One side of the gear 31 is engaged with one of the racks 32, and the other side of the gear 31 is engaged with the other rack 32. The drive motor 33 is used to drive the gear 31 to rotate. The drive motor 33 is fixedly arranged on the outer wall of the connecting sleeve 13. The drive motor 33 passes through the connecting sleeve 13 and is fixedly connected to the gear 31. In this design, the drive motor 33 is located outside the connecting sleeve 13 to facilitate heat dissipation. The drive motor 33 is a servo motor.

[0036] Reference Figure 2 and Figure 3 When the mounting frame 11 needs to slide, the drive motor 33 rotates the gear 31, which in turn drives the mounting frame 11 to slide vertically. Because the gear 31 meshes with two racks 32, the rotation of the gear 31 drives the racks 32 in opposite directions, enabling the two mounting frames 11 to slide in opposite directions within the exhaust pipe 1 and the cleaning housing 2. This ensures that one mounting frame 11 is performing exhaust gas filtering work properly within the exhaust pipe 1, while the other mounting frame 11 is located within the cleaning housing 2 for cleaning or standby.

[0037] In order to facilitate the cleaning of the two filters 111, refer to Figure 2 Two cleaning discs 22 are provided, and the two cleaning discs 22 are fixed coaxially. The brush cloth on one cleaning disc 22 can be pressed against the filter screen 111 on one mounting frame 11, and the brush cloth on the other cleaning disc 22 can be pressed against the filter screen 111 on the other mounting frame 11. When the two mounting frames 11 work alternately, the corresponding cleaning disc 22 can clean the corresponding filter screen 111 in a timely and effective manner.

[0038] Reference Figure 2A driven pulley 222 is coaxially fixed to the cleaning disc 22, and a driving pulley 211 is rotatably provided on the bottom side of the support frame 21. A transmission belt 23 is provided between the driven pulley 222 and the driving pulley 211. One side of the transmission belt 23 is sleeved on the driven pulley 222, and the other side of the transmission belt 23 is sleeved on the driving pulley 211. The cleaning motor 24 is fixedly provided on the outer wall of the cleaning housing 2. A transmission shaft 241 is provided between the cleaning motor 24 and the driving pulley 211. The driving pulley 211 is fixedly connected to one end of the transmission shaft 241. The drive shaft of the cleaning motor 24 passes through the side wall of the cleaning housing 2 and is fixedly connected to the other end of the transmission shaft 241. When the cleaning motor 24 is working, the driving pulley 211 is driven to rotate through the transmission shaft 241, and the driving pulley 211 drives the driven pulley 222 to rotate through the transmission belt 23, so that the two cleaning discs 22 rotate synchronously to clean the filter 111. The cleaning motor 24 is arranged on the outer wall of the cleaning housing 2 to facilitate maintenance and inspection and to facilitate heat dissipation of the cleaning motor 24.

[0039] The working principle of a circulating fluidized bed boiler exhaust dust removal device according to an embodiment of the present application is as follows: In actual application, the circulating fluidized bed boiler generates exhaust gas during operation, and the exhaust gas is processed through an exhaust pipe 1. Within the exhaust pipe 1, one mounting frame 11 is located within the exhaust pipe 1 to perform exhaust gas filtering, while the other mounting frame 11 is located within the cleaning housing 2 and is in a standby state or has just completed cleaning.

[0040] When the working installation frame 11 needs to be cleaned, the drive motor 33 is started, and the gear 31 engages with the two racks 32 respectively, driving the two installation frames 11 to start sliding alternately along the sliding hole 12. The working installation frame 11 slides downward into the cleaning sleeve 2, while the installation frame 11 originally in the cleaning sleeve 2 slides upward into the exhaust pipe 1 to continue filtering the exhaust gas. The drive shaft of the cleaning motor 24 drives the transmission shaft 241 to rotate, thereby rotating the active pulley 211. The active pulley 211 drives the driven pulley 222 to rotate through the transmission belt 23, and the cleaning disc 22 rotates accordingly. The brush cloth on the cleaning disc 22 contacts the filter screen 111 on the installation frame 11 that enters the cleaning sleeve 2, and the brush cloth sweeps off the smoke and dust impurities on the filter screen 111, thereby realizing automatic cleaning of the filter screen 111.

[0041] When it is necessary to inspect or maintain the components in the cleaning housing 2, the cleaning housing 2 can be separated from the connecting sleeve 13 by simply unscrewing the fixing bolts 25. During operation, the entire device realizes the automation of the cleaning of the filter 111, reduces manpower consumption, and improves the efficiency of dust removal.

[0042] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A circulating fluidized bed boiler tail gas dust removal device, comprising a tail gas pipe (1), a mounting frame (11) provided in the tail gas pipe (1), a filter screen (111) fixedly provided in the mounting frame (11), characterized in that: The bottom of the exhaust pipe (1) is provided with a sliding hole (12), the mounting frame (11) is slidably matched with the sliding hole (12), the bottom of the exhaust pipe (1) is provided with a connecting sleeve (13), the top of the connecting sleeve (13) is fixedly connected to the bottom of the exhaust pipe (1), the sliding hole (12) is located in the connecting sleeve (13), the connecting sleeve (13) is provided with a sliding component (3), the sliding component (3) is used to drive the mounting frame (11) to slide vertically; the bottom of the connecting sleeve (13) is fixedly docked with a cleaning sleeve (2), the cleaning sleeve (2) is fixedly provided with a support frame (21), and a cleaning disc (22) is rotatably provided on the support frame (21); a brush cloth is provided on the outer end surface of the cleaning disc (22), the brush cloth can be abutted against the filter screen (111), and the cleaning sleeve (2) is provided with a cleaning motor (24) for driving the cleaning disc (22) to rotate.

2. The circulating fluidized bed boiler tail gas dust removal device according to claim 1, characterized in that: The mounting frame (11) and the sliding hole (12) are both provided in pairs, wherein one mounting frame (11) is slidably matched with one of the sliding holes (12) and is located in the tailpipe (1), and the other mounting frame (11) is slidably matched with the other sliding hole (12) and is located in the cleaning housing (2).

3. The circulating fluidized bed boiler tail gas dust removal device according to claim 2, characterized in that: The sliding assembly (3) comprises a gear (31), a rack (32), and a drive motor (33); the gear (31) is rotatably arranged in the connecting sleeve (13); the rack (32) is fixedly arranged inside the mounting frame (11); one side of the gear (31) is meshed with one of the racks (32); the other side of the gear (31) is meshed with the other rack (32); and the drive motor (33) is used to drive the gear (31) to rotate.

4. The circulating fluidized bed boiler tail gas dust removal device according to claim 3, characterized in that: An embedded groove (112) is provided on the side wall of the installation frame (11), the rack (32) is located in the embedded groove (112), and the gear (31) extends into the embedded groove (112) and meshes with the rack (32).

5. The circulating fluidized bed boiler tail gas dust removal device according to claim 2, characterized in that: The cleaning discs (22) are provided in two numbers, and the two cleaning discs (22) are coaxially fixed. The brush cloth on one of the cleaning discs (22) can be pressed against the filter screen (111) on one of the mounting frames (11), and the brush cloth on the other cleaning disc (22) can be pressed against the filter screen (111) on the other mounting frame (11).

6. The circulating fluidized bed boiler tail gas dust removal device according to claim 1, characterized in that: A driven pulley (222) is coaxially fixed on the cleaning disc (22), a driving pulley (211) is rotatably provided on the bottom side of the support frame (21), a transmission belt (23) is provided between the driven pulley (222) and the driving pulley (211), one side of the transmission belt (23) is sleeved on the driven pulley (222), and the other side of the transmission belt (23) is sleeved on the driving pulley (211), the cleaning motor (24) is fixedly provided on the outer wall of the cleaning housing (2), a transmission shaft (241) is provided between the cleaning motor (24) and the driving pulley (211), the driving pulley (211) is fixedly connected to one end of the transmission shaft (241), and the driving shaft of the cleaning motor (24) passes through the side wall of the cleaning housing (2) and is fixedly connected to the other end of the transmission shaft (241).

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