Biomass boiler fly ash collecting device

Abstract

The utility model relates to the technical field of fly ash collection, in particular to a fly ash collection device of a biomass boiler, which not only can be used for filtering flue gas, but also can be used for assisting a worker in cleaning a filtering mechanism, and is convenient to use, low in labor intensity and high in practicability. Comprising a bottom plate, a support, a barrel, a sealing cover and a gas conveying pipe, the barrel is fixedly installed at the upper end of the bottom plate through the support, a cavity is formed in the barrel, a discharging opening communicated with the cavity is formed in the lower portion of the barrel, the sealing cover is installed on the outer side of the discharging opening through bolts, the gas conveying pipe is installed on the lower portion of the barrel, and the output end of the gas conveying pipe is communicated with the lower portion of the cavity of the barrel; the device further comprises a filtering mechanism, a cleaning mechanism and an exhaust mechanism, the filtering mechanism is installed in the barrel, the output end of the filtering mechanism is communicated with the exhaust mechanism, the exhaust mechanism has an exhaust function, the cleaning mechanism is installed on the barrel, the cleaning mechanism is used for cleaning the filtering mechanism, and the filtering mechanism has a filtering function.

Description

Technical Field

[0001] This utility model relates to the technical field of fly ash collection, and in particular to a fly ash collection device for biomass boilers. Background Technology

[0002] A biomass boiler is a thermal energy device that uses biomass as fuel to produce steam or hot water, primarily for industrial production, district heating, or power generation. It releases heat by burning agricultural waste (straw, rice husks), forestry residues (wood chips, bark), energy crops (reeds, miscanthus), or biomass briquettes (pellets, briquettes) to drive a steam turbine for power generation or provide heat for industrial processes. During combustion, fuel particles break down due to volatile matter release and organic matter decomposition, releasing fine particles. Subsequently, minerals melt and aggregate at high temperatures, forming a fly ash matrix. This fly ash is easily discharged into the environment along with the biomass boiler's flue gas system. This fly ash can not only replace some cement raw materials in brick or concrete production, but potassium-rich fly ash can also be used as a slow-release fertilizer to improve acidic soils; therefore, fly ash collection devices are needed to collect this fly ash.

[0003] In the prior art, a utility model patent with patent application number 202021383624.3 discloses a biomass boiler fly ash collection device, which mainly consists of a filter screen and a housing. In use, the flue gas discharged from the biomass boiler enters the housing, and then the flue gas is filtered through the filter screen before being discharged to the outside. The fly ash in the flue gas is blocked by the filter screen and adheres to the filter screen, thus achieving fly ash collection. However, the following problem exists in its use: as the usage time increases, more and more impurities adhere to the filter screen, and the aforementioned prior art device cannot assist the operator in cleaning the fly ash on the filter screen, resulting in inconvenience in use and poor practicality. Utility Model Content

[0004] To solve the above-mentioned technical problems, this utility model provides a biomass boiler fly ash collection device that can not only filter flue gas, but also assist workers in cleaning the filter mechanism. It is easy to use, has low labor intensity, and is highly practical.

[0005] This utility model discloses a biomass boiler fly ash collection device, comprising a base plate, a support, a cylinder, a sealing cover, and a gas supply pipe. The cylinder is fixedly mounted on the upper part of the base plate by the support. A chamber is provided inside the cylinder, and an outlet communicating with the chamber is provided at the lower part of the cylinder. The sealing cover is bolted to the outside of the outlet. The gas supply pipe is installed at the lower part of the cylinder, and its output end communicates with the lower part of the cylinder chamber. It also includes a filtration mechanism, a cleaning mechanism, and an exhaust mechanism. The filtration mechanism is installed in the cylinder, and its output end communicates with the exhaust mechanism, which has the function of exhausting gases. The cleaning mechanism is installed on the cylinder and is used to clean the filtration mechanism, which also has the function of filtering gases. The input end of the gas supply pipe is connected to the flue gas pipe of the biomass boiler. When the furnace is working, the fly ash and flue gas it produces are discharged together into the gas supply pipe through the flue pipe. Then, the flue gas containing fly ash enters the gas supply pipe, and after being filtered by the filtration mechanism, it enters the exhaust mechanism. The filtered flue gas is then discharged into the external gas treatment mechanism for further processing. The filtration mechanism filters out the fly ash from the flue gas. When it is necessary to clean and collect the fly ash on the filtration mechanism, the cleaning mechanism is opened to clean the fly ash adhering to the filtration mechanism, causing the fly ash to fall to the lower part of the cylinder chamber. Then, the gas supply pipe is opened to collect the fly ash that has fallen to the lower part of the cylinder chamber. It can not only filter flue gas, but also assist workers in cleaning the filtration mechanism. It is convenient to use, has low labor intensity, and is highly practical.

[0006] Preferably, the filtration mechanism includes a filter cylinder, a bearing, a connecting pipe, a rotary joint, and a rotating mechanism. The filter cylinder is rotatably mounted on the bearing, which is fixedly mounted inside the cylinder cavity. The filter cylinder has a cavity, and its lower part has multiple filter holes communicating with the cavity. A filter screen is provided on the outer wall of the filter cylinder. The rotating mechanism is used to rotate the filter cylinder. The lower end of the connecting pipe is connected to the filter cylinder and rotatably mounted on the cylinder body. The upper end of the connecting pipe is connected to the rotary joint, which is fixedly mounted on the cylinder body and connected to the exhaust mechanism. When external flue gas enters the cylinder cavity through the gas supply pipe, it is filtered by the filter screen on the filter cylinder and then enters the cavity of the filter cylinder. Fly ash in the flue gas is blocked on the filter screen on the outer wall of the filter cylinder. The flue gas in the cavity of the filter cylinder is then discharged through the connecting pipe and the rotary joint into the exhaust mechanism. This facilitates the filtration and collection of fly ash in the flue gas.

[0007] Preferably, the rotating mechanism includes a support shaft, bevel gear A, bevel gear B, a drive shaft, a fixed plate, and a drive motor. The support shaft is rotatably mounted on the base plate and the cylinder. The filter cylinder is fixedly mounted on the upper end of the support shaft, and the filter cylinder is coaxial with the support shaft. Bevel gear A is fixedly mounted on the support shaft and meshes with bevel gear B. Bevel gear B is fixedly mounted on the drive shaft. The drive shaft is rotatably mounted on the fixed plate. The input end of the drive shaft is connected to the drive motor. Both the fixed plate and the drive motor are fixedly mounted on the upper end of the base plate. When cleaning the fly ash on the outer wall of the filter cylinder by the cleaning mechanism, the drive motor is turned on. The drive motor drives bevel gear B to rotate bevel gear A through the drive shaft. Bevel gear A rotates the sealing cover through the support shaft. During the rotation of the sealing cover, the dust on the outer wall of the filter cylinder is evenly cleaned off by the cleaning mechanism. This facilitates the cleaning of dust on the outer wall of the filter cylinder.

[0008] Preferably, the cleaning mechanism includes a scraper, a sliding rod, a fixed column, a drive mechanism, and a flexible mechanism. The scraper is located on the left side of the filter cylinder and within the cylinder's cavity. The scraper is fixedly mounted on the sliding rod, and the left part of the sliding rod is slidably mounted on the fixed column. The fixed column is fixedly mounted on the inner wall of the cylinder. The drive mechanism is mounted on the cylinder, and its output end is connected to the scraper via the flexible mechanism. When cleaning fly ash adhering to the outer wall of the filter cylinder, the drive mechanism is activated, causing the flexible mechanism to move the scraper to the right, bringing the scraper into contact with the outer wall of the filter cylinder. Then, the filter cylinder rotates. During the rotation, the scraper thoroughly scrapes off the dust from the outer wall of the filter cylinder, facilitating the cleaning of fly ash from the outer wall of the filter cylinder.

[0009] Preferably, the flexible mechanism includes a spring and a movable plate. The movable plate is installed at the output end of the drive mechanism, the left end of the spring is connected to the movable plate, and the scraper is fixedly installed at the right end of the spring. When cleaning the filter cylinder with the scraper, the drive mechanism drives the movable plate to move to the right, and the movable plate causes the scraper to move to the right through the spring, so that the scraper contacts the outer wall of the filter cylinder. Then the filter cylinder rotates. Because the spring is elastic, hard contact between the scraper and the filter cylinder is avoided, reducing the scratches on the filter cylinder caused by the scraper.

[0010] Preferably, the driving mechanism includes a hydraulic cylinder and a sliding rod. The hydraulic cylinder is mounted on the cylinder body, and the sliding rod is slidably mounted on the cylinder body. The left end of the sliding rod is connected to the output end of the hydraulic cylinder, and the right end of the sliding rod is fixedly connected to the moving plate. When the moving plate is driven to move in the left and right direction, the hydraulic cylinder is opened, and the sliding rod causes the moving plate to move to the right. The moving plate causes the scraper to move to the right through a spring. This facilitates the movement of the scraper.

[0011] Preferably, the exhaust mechanism includes an induced draft fan and an exhaust pipe. The input end of the induced draft fan is connected to a rotary joint through the exhaust pipe; the output end of the induced draft fan is connected to an external gas treatment mechanism. When the induced draft fan is turned on, the flue gas in the filter cylinder cavity is discharged sequentially through the connecting pipe, rotary joint, exhaust pipe and induced draft fan, which facilitates the discharge of gas.

[0012] Compared with the prior art, the advantages of this utility model are: it can not only filter flue gas, but also assist workers in cleaning the filter mechanism. It is convenient to use, has low labor intensity, and is highly practical. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the isometric structure of this utility model;

[0014] Figure 2 It is a structural diagram of the filter cartridge, induced draft fan, and rotary joint, etc.

[0015] Figure 3 This is a structural schematic diagram of the drive motor, support shaft, and bevel gear A, etc.

[0016] Figure 4 It is a structural diagram of hydraulic cylinders, sliding rods, and scrapers, etc.

[0017] Figure 5 This is a cross-sectional structural diagram of the present invention.

[0018] The following are labels in the attached diagram: 1. Base plate; 2. Support; 3. Cylinder; 4. Sealing cap; 5. Gas supply pipe; 6. Filter cylinder; 7. Bearing; 8. Connecting pipe; 9. Rotary joint; 10. Support shaft; 11. Bevel gear A; 12. Bevel gear B; 13. Drive shaft; 14. Fixing plate; 15. Drive motor; 16. Scraper; 17. Sliding rod; 18. Fixing column; 19. Spring; 20. Moving plate; 21. Hydraulic cylinder; 22. Sliding rod; 23. Exhaust fan; 24. Discharge pipe. Detailed Implementation

[0019] To facilitate understanding of this utility model, a more complete description will be given below with reference to the accompanying drawings. This utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to make the disclosure of this utility model more thorough and complete.

[0020] Example 1

[0021] like Figures 1 to 5The biomass fly ash collection device of this utility model includes a base plate 1, a support 2, a cylinder 3, a sealing cover 4, a gas supply pipe 5, a filter mechanism, a cleaning mechanism, and an exhaust mechanism. The cylinder 3 is fixedly installed on the upper end of the base plate 1 by the support 2. A chamber is provided inside the cylinder 3. An outlet communicating with the chamber is provided at the lower part of the cylinder 3. The sealing cover 4 is installed on the outside of the outlet by bolts. The gas supply pipe 5 is installed at the lower part of the cylinder 3. The output end of the gas supply pipe 5 is connected to the lower part of the chamber of the cylinder 3. The filter mechanism is installed in the cylinder 3. The output end of the filter mechanism is connected to the exhaust mechanism. The exhaust mechanism has the function of exhausting gas. The cleaning mechanism is installed on the cylinder 3. The cleaning mechanism is used to clean the filter mechanism. The filter mechanism has the function of filtering gas. The input end of the gas supply pipe 5 is connected to the flue gas pipe of the biomass boiler. When the biomass boiler is working, the fly ash and flue gas it produces are discharged together into the gas supply pipe 5 through the flue pipe. Then, the flue gas containing fly ash enters the gas supply pipe 5, and after being filtered by the filter mechanism, it enters the exhaust mechanism. The filtered flue gas is then discharged into the external gas treatment mechanism for further processing. The filter mechanism filters out the fly ash from the flue gas. When it is necessary to clean and collect the fly ash on the filter mechanism, the cleaning mechanism is opened to clean the fly ash adhering to the filter mechanism, causing the fly ash to fall to the lower part of the cylinder 3 chamber. Then, the gas supply pipe 5 is opened to collect the fly ash that has fallen to the lower part of the cylinder 3 chamber. It can not only filter flue gas, but also assist workers in cleaning the filter mechanism. It is convenient to use, has low labor intensity, and is highly practical.

[0022] like Figure 2 , Figure 3 and Figure 5 The filtration mechanism includes a filter cylinder 6, a bearing 7, a connecting pipe 8, a rotary joint 9, and a rotating mechanism. The filter cylinder 6 is rotatably mounted on the bearing 7, which is fixedly mounted in the chamber of the cylinder body 3. The filter cylinder 6 has a cavity, and the lower part of the filter cylinder 6 has multiple filter holes communicating with the cavity. A filter screen is provided on the outer wall of the filter cylinder 6. The rotating mechanism is used to rotate the filter cylinder 6. The lower end of the connecting pipe 8 is connected to the filter cylinder 6, and the connecting pipe 8 is rotatably mounted on the cylinder body 3. The upper end of the connecting pipe 8 is connected to the rotary joint 9, which is fixedly mounted on the cylinder body 3 and is connected to the exhaust mechanism. When external flue gas enters the chamber of the cylinder body 3 through the gas supply pipe 5, the flue gas is filtered by the filter screen on the filter cylinder 6 and then enters the cavity of the filter cylinder 6. The fly ash in the flue gas is blocked on the filter screen on the outer wall of the filter cylinder 6. Then, the flue gas in the cavity of the filter cylinder 6 is discharged through the connecting pipe 8 and the rotary joint 9 into the exhaust mechanism. This facilitates the filtration and collection of fly ash in the flue gas.

[0023] like Figure 3The rotating mechanism includes a support shaft 10, bevel gear A11, bevel gear B12, drive shaft 13, fixed plate 14, and drive motor 15. The support shaft 10 is rotatably mounted on the base plate 1 and the cylinder 3. The filter cylinder 6 is fixedly mounted on the upper end of the support shaft 10, and the filter cylinder 6 is coaxial with the support shaft 10. Bevel gear A11 is fixedly mounted on the support shaft 10, and bevel gear A11 meshes with bevel gear B12. Bevel gear B12 is fixedly mounted on the drive shaft 13, and the drive shaft 13 is rotatably mounted on the fixed plate 14. The input end of the drive shaft 13... The fixed plate 14 and the drive motor 15 are both fixedly installed on the upper end of the base plate 1. When the fly ash on the outer wall of the filter cylinder 6 is cleaned by the cleaning mechanism, the drive motor 15 is turned on. The drive motor 15 drives the bevel gear B12 to rotate the bevel gear A11 through the drive shaft 13. The bevel gear A11 rotates the sealing cover 4 through the support shaft 10. During the rotation, the dust on the outer wall of the filter cylinder 6 is evenly cleaned by the cleaning mechanism. This facilitates the cleaning of dust on the outer wall of the filter cylinder 6.

[0024] like Figure 3 , Figure 4 and Figure 5 The cleaning mechanism includes a scraper 16, a sliding rod 17, a fixed column 18, a drive mechanism, and a flexible mechanism. The scraper 16 is located on the left side of the filter cylinder 6 and is located inside the cylinder 3. The scraper 16 is fixedly installed on the sliding rod 17, and the left part of the sliding rod 17 is slidably installed on the fixed column 18. The fixed column 18 is fixedly installed on the inner side wall of the cylinder 3. The drive mechanism is installed on the cylinder 3, and the output end of the drive mechanism is connected to the scraper 16 through the flexible mechanism. When cleaning the fly ash attached to the outer side wall of the filter cylinder 6, the drive mechanism is opened, so that the flexible mechanism drives the scraper 16 to move to the right, so that the scraper 16 contacts the outer side wall of the filter cylinder 6. Then the filter cylinder 6 is rotated. During the rotation, the scraper 16 scrapes off the dust on the outer side wall of the filter cylinder 6, which facilitates the cleaning of the fly ash on the outer side wall of the filter cylinder 6.

[0025] like Figure 4 The flexible mechanism includes a spring 19 and a movable plate 20. The movable plate 20 is installed at the output end of the drive mechanism. The left end of the spring 19 is connected to the movable plate 20, and the scraper 16 is fixedly installed at the right end of the spring 19. When cleaning the filter cylinder 6 through the scraper 16, the drive mechanism drives the movable plate 20 to move to the right. The movable plate 20 causes the scraper 16 to move to the right through the spring 19, so that the scraper 16 contacts the outer wall of the filter cylinder 6. Then the filter cylinder 6 rotates. Because the spring 19 is elastic, it avoids hard contact between the scraper 16 and the filter cylinder 6, reducing the scratches caused by the scraper 16 to the filter cylinder 6.

[0026] like Figure 4The driving mechanism includes a hydraulic cylinder 21 and a sliding rod 22. The hydraulic cylinder 21 is mounted on the cylinder 3, and the sliding rod 22 is slidably mounted on the cylinder 3. The left end of the sliding rod 22 is connected to the output end of the hydraulic cylinder 21, and the right end of the sliding rod 22 is fixedly connected to the moving plate 20. When the moving plate 20 is driven to move in the left and right direction, the hydraulic cylinder 21 is opened, and the sliding rod 22 causes the moving plate 20 to move to the right. The moving plate 20 causes the scraper 16 to move to the right through the spring 19, which facilitates the movement of the scraper 16.

[0027] The exhaust mechanism includes an induced draft fan 23 and an exhaust pipe 24. The input end of the induced draft fan 23 is connected to the rotary joint 9 through the exhaust pipe 24. The output end of the induced draft fan 23 is connected to an external gas treatment mechanism. When the induced draft fan 23 is turned on, the flue gas in the cavity of the filter cartridge 6 can be discharged sequentially through the connecting pipe 8, the rotary joint 9, the exhaust pipe 24 and the induced draft fan 23, which facilitates the discharge of gas.

[0028] Example 2

[0029] Based on Example 1, a transparent observation window is provided on the cylinder 3; this feature facilitates the observation of the working status of the equipment inside the cylinder 3.

[0030] The gas transmission pipe 5, rotary joint 9, drive shaft 13, scraper 16, spring 19 and induced draft fan 23 of the biomass boiler fly ash collection device of this utility model are all purchased from the market. Technical personnel in this industry only need to install and operate them according to the accompanying instruction manual, without requiring any creative work from those skilled in the art.

[0031] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A biomass boiler fly ash collection device, comprising a base plate (1), a support (2), a cylinder (3), a sealing cover (4), and a gas transmission pipe (5), wherein the cylinder (3) is fixedly installed on the upper end of the base plate (1) by the support (2), a chamber is provided inside the cylinder (3), and an outlet communicating with the chamber is provided at the lower part of the cylinder (3), the sealing cover (4) is installed on the outside of the outlet by bolts, and the gas transmission pipe (5) is installed at the lower part of the cylinder (3), the output end of the gas transmission pipe (5) communicating with the lower part of the chamber of the cylinder (3); characterized in that, It also includes a filtration mechanism, a cleaning mechanism and an exhaust mechanism. The filtration mechanism is installed in the cylinder (3). The output end of the filtration mechanism is connected to the exhaust mechanism. The exhaust mechanism has the function of exhausting air. The cleaning mechanism is installed on the cylinder (3). The cleaning mechanism is used to clean the filtration mechanism. The filtration mechanism has the function of filtering air.

2. The biomass boiler fly ash collection device as described in claim 1, characterized in that, The filtration mechanism includes a filter cylinder (6), a bearing (7), a connecting pipe (8), a rotary joint (9), and a rotating mechanism. The filter cylinder (6) is rotatably mounted on the bearing (7), and the bearing (7) is fixedly mounted in the cavity of the cylinder body (3). A cavity is provided inside the filter cylinder (6). Multiple filter holes communicating with the cavity are provided at the lower part of the filter cylinder (6). A filter screen is provided on the outer wall of the filter cylinder (6). The rotating mechanism is used to rotate the filter cylinder (6). The lower end of the connecting pipe (8) is connected to the filter cylinder (6). The connecting pipe (8) is rotatably mounted on the cylinder body (3). The upper end of the connecting pipe (8) is connected to the rotary joint (9). The rotary joint (9) is fixedly mounted on the cylinder body (3). The rotary joint (9) is connected to the exhaust mechanism.

3. The biomass boiler fly ash collection device as described in claim 2, characterized in that, The rotating mechanism includes a support shaft (10), bevel gear A (11), bevel gear B (12), drive shaft (13), fixed plate (14), and drive motor (15). The support shaft (10) is rotatably mounted on the base plate (1) and the cylinder (3). The filter cylinder (6) is fixedly mounted on the upper end of the support shaft (10). The filter cylinder (6) is coaxial with the support shaft (10). The bevel gear A (11) is fixedly mounted on the support shaft (10). The bevel gear A (11) meshes with the bevel gear B (12). The bevel gear B (12) is fixedly mounted on the drive shaft (13). The drive shaft (13) is rotatably mounted on the fixed plate (14). The input end of the drive shaft (13) is connected to the drive motor (15). The fixed plate (14) and the drive motor (15) are both fixedly mounted on the upper end of the base plate (1).

4. The biomass boiler fly ash collection device as described in claim 1, characterized in that, The cleaning mechanism includes a scraper (16), a sliding rod (17), a fixed column (18), a drive mechanism, and a flexible mechanism. The scraper (16) is located on the left side of the filter cylinder (6) and inside the cylinder body (3). The scraper (16) is fixedly installed on the sliding rod (17). The left side of the sliding rod (17) is slidably installed on the fixed column (18). The fixed column (18) is fixedly installed on the inner wall of the cylinder body (3). The drive mechanism is installed on the cylinder body (3). The output end of the drive mechanism is connected to the scraper (16) through the flexible mechanism.

5. A biomass boiler fly ash collection device as described in claim 4, characterized in that, The flexible mechanism includes a spring (19) and a movable plate (20). The movable plate (20) is installed at the output end of the drive mechanism. The left end of the spring (19) is connected to the movable plate (20), and the scraper (16) is fixedly installed at the right end of the spring (19).

6. The biomass boiler fly ash collection device as described in claim 5, characterized in that, The driving mechanism includes a hydraulic cylinder (21) and a sliding rod (22). The hydraulic cylinder (21) is mounted on the cylinder (3), and the sliding rod (22) is slidably mounted on the cylinder (3). The left end of the sliding rod (22) is connected to the output end of the hydraulic cylinder (21), and the right end of the sliding rod (22) is fixedly connected to the moving plate (20).

7. The biomass boiler fly ash collection device as described in claim 2, characterized in that, The exhaust mechanism includes an exhaust fan (23) and an exhaust pipe (24). The input end of the exhaust fan (23) is connected to the rotary joint (9) through the exhaust pipe (24).

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