Reverse blowing type filter element ash removal device and ash removal method

Abstract

The invention relates to a back flushing type filter element ash removal device and an ash removal method, and belongs to the technical field of filter element cleaning equipment of filters in the metallurgical industry. According to the technical scheme, a barrel (4) is fixed to a barrel support (11), an upper end cover (1) is arranged at the upper end of the barrel (4), a lower end plate (6) is arranged at the lower end of the barrel (4), a reverse blowing rotor (2) is arranged on the central axis of the barrel (4), the upper end of the reverse blowing rotor (2) is of a closed structure, the lower end of the reverse blowing rotor (2) is connected with a nitrogen inlet pipe and a valve (10), and three sets of spray pipes (3) are arranged on the reverse blowing rotor (2). The three groups of spray pipes (3) are uniformly arranged along the circumferential direction, the back flushing rotor (2) is rotatably connected with the lower end plate (6) through a bearing, and the lower end plate (6) is provided with an ash discharging pipeline and a valve (8). The method has the beneficial effects that the repeated utilization rate of the filter element can be effectively improved, the use cost of the filter element is reduced, and meanwhile, environmental pollution in the purging process is avoided.

Description

Technical Field

[0001] The invention relates to a back-flushing filter element cleaning device and a cleaning method, belonging to the technical field of filter element cleaning equipment in the metallurgical industry. Background Art

[0002] Coke oven gas, a high-calorific-value secondary energy source, is abundant in the steel industry and possesses significant utilization value. However, because the coke oven gas and its delivery pipelines contain impurities such as dust, rust, and coal tar, a filter must be installed before the pressure regulating valve in the gas pressure regulator to remove these impurities and ensure proper and stable operation of the regulator, thereby meeting production safety requirements. On the one hand, since each gas filter costs 1,500 yuan, and approximately 100 are used monthly, the cost is high. To reduce costs, it is necessary to purge and clean some of the replaced filters, increasing filter reuse and thus reducing operating costs. On the other hand, this process generates significant amounts of dust and rust, polluting the environment. Therefore, through research and repeated testing, a device for cleaning and purging filter elements was developed that balances cost reduction with environmental protection, demonstrating high application and practical value. Summary of the Invention

[0003] The purpose of the present invention is to provide a back-flushing filter element cleaning device and a method of use, which can effectively improve the reuse rate of the filter element, reduce the cost of using the filter element, and avoid polluting the environment during the purge process, thereby solving the problems existing in the background technology.

[0004] The technical solution of the present invention is: A back-blowing filter element cleaning device comprises an upper end cover, a back-blowing rotor, a nozzle, a cylinder, a lower end plate, an ash discharge pipe and valve, a nitrogen inlet pipe and valve, and a cylinder bracket. The cylinder is fixed on the cylinder bracket, an upper end cover is provided at the upper end of the cylinder, a lower end plate is provided at the lower end of the cylinder, the back-blowing rotor is arranged on the central axis of the cylinder, the upper end of the back-blowing rotor is a closed structure, the lower end of the back-blowing rotor is connected to the nitrogen inlet pipe and valve, three groups of nozzles are provided on the back-blowing rotor, and the three groups of nozzles are evenly arranged in the circumferential direction. The back-blowing rotor is rotatably connected to the lower end plate through a bearing, and an ash discharge pipe and valve are provided on the lower end plate.

[0005] Each group of nozzles consists of 8-12 nozzles arranged at equal distances up and down.

[0006] The upper end cover and the lower end plate are respectively provided with circular bosses that match the filter element.

[0007] The size of the cylinder matches the size of the filter element.

[0008] The bearing comprises a rolling bearing and an axial thrust bearing installed in a bearing body, wherein the rolling bearing is located at an upper portion and the axial thrust bearing is located at a lower portion.

[0009] The diameter of the central opening of the bearing body is the same as the inner diameter of the bearing, and the outside of the center of the bearing body is welded to the nitrogen inlet pipe and the valve.

[0010] There are eight ash discharge pipes and valves on the lower end plate, which are arranged in the circumferential direction of the lower end plate.

[0011] A method for backwashing and cleaning the filter element by reverse blowing uses the reverse blowing filter element cleaning device defined above. When backwashing and cleaning the filter element, first load the filter element into the cylinder body of the device and place it on the circular boss of the lower end plate. Adjust the distance between the three groups of nozzles of the reverse blowing rotor and the inner wall of the filter element. Press the upper end face of the filter element with the corresponding circular boss of the upper end cover, and fix the upper end cover firmly with four bolts. Close the ash discharge pipes and valves on the lower end plate, open the nitrogen inlet pipe and the valve, and blow the filter element.

[0012] After blowing the filter element, open the ash discharge pipes and valves, and collect the dust and impurities into the dust collection bag.

[0013] The beneficial effects of the present invention are: simple structure, strong practicability, no environmental pollution during cleaning and reverse blowing, corresponding devices can be made according to different sizes of filter elements, and the manufacturing materials are all common pipes, steel plates, bearings, valves, etc. on site, which can effectively improve the reuse rate of the filter element and reduce the use cost of the filter element. Brief Description of the Drawings

[0014] Figure 1 It is a schematic diagram of the present invention; In the figure: upper end cover 1, reverse blowing rotor 2, nozzle 3, cylinder body 4, filter element 5, lower end plate 6, rolling bearing 7, ash discharge pipe and valve 8, axial thrust bearing 9, nitrogen inlet pipe and valve 10, cylinder body support 11. Detailed Embodiments

[0015] The following further illustrates the present invention through examples in conjunction with the drawings.

[0016] Referring to the attached Figure 1 , a reverse blowing filter element cleaning device includes an upper end cover 1, a reverse blowing rotor 2, a nozzle 3, a cylinder body 4, a lower end plate 6, an ash discharge pipe and valve 8, a nitrogen inlet pipe and valve 10, and a cylinder body support 11. The cylinder body 4 is fixed on the cylinder body support 11. An upper end cover 1 is provided at the upper end of the cylinder body 4, and a lower end plate 6 is provided at the lower end of the cylinder body 4. The reverse blowing rotor 2 is arranged on the central axis of the cylinder body 4. The upper end of the reverse blowing rotor 2 is a closed structure. The lower end of the reverse blowing rotor 2 is connected to the nitrogen inlet pipe and valve 10. Three groups of nozzles 3 are provided on the reverse blowing rotor 2, and the three groups of nozzles 3 are evenly arranged in the circumferential direction. The reverse blowing rotor 2 is rotationally connected to the lower end plate 6 through a bearing, and an ash discharge pipe and valve 8 is provided on the lower end plate 6.

[0017] In this embodiment, referring to the attachedFigure 1 , the device includes: upper end cover 1, backflush rotor 2, nozzle 3, cylinder body 4, filter element 5, lower end plate 6, rolling bearing 7, ash discharge pipeline and valve 8, axial thrust bearing 9, nitrogen inlet pipe and valve 10, and cylinder body support 11, where: The upper end cover 1 is made of ordinary carbon steel plate with a thickness of 10 - 12 mm, and is internally provided with a concentric circular boss with a thickness of 5 mm, and the diameter is equal to the outer diameter of the filter element 5.

[0018] The backflush rotor 2 is made of a carbon steel pipe with a diameter of φ57, and the upper end is welded with a blind plate for sealing. Three groups of nozzles 3 with a diameter of φ12 are evenly distributed on the carbon steel pipe at an angle of 120°, and each group of nozzles 3 is equidistantly arranged with 8 - 12 pieces.

[0019] The cylinder body 4 is made of a carbon steel pipe with DN800 * 16, and the height is 6 - 8 mm higher than the height of the filter element 5.

[0020] The lower end plate 6 is made of a steel plate with a thickness of 30 mm, and is internally provided with a concentric circular boss with a thickness of 5 mm. Eight ash discharge holes with a diameter of 32 - 40 mm are evenly distributed in the circular ring between the boss and the cylinder body 4 for discharging ash.

[0021] The rolling bearing 7 and the axial thrust bearing 9 are installed in the prefabricated bearing body. During installation, the rolling bearing 7 is on the upper part and the axial thrust bearing 9 is on the lower part, and they cannot be installed reversely. The diameter of the central hole of the bearing body is the same as the inner diameter of the bearing, and the outside is welded to the nitrogen inlet pipe and valve 10.

[0022] During backflush cleaning, first install the filter element 5 to be cleaned on the circular boss of the lower end plate 6 of this device, adjust the distance between the three groups of nozzles 3 of the backflush rotor 2 and the inner wall of the filter element 5 to be uniform. After pressing the upper end face of the filter element 5 with the corresponding circular boss of the upper end cover 1, fix the upper end cover 1 firmly with four bolts to prevent the filter element 5 from shaking or moving. If the gap between the upper end cover 1 and the upper end face of the filter element 5 is large, a rubber gasket with a certain thickness can be added for adjustment; connect the eight ash discharge holes on the outer circle of the lower end plate 6 to the pipeline and the dust collection bag in advance, and close the ash discharge valve; Connect the nitrogen pipeline firmly to the nitrogen inlet pipe and valve 10 at the lower part of this device, and gradually open the nitrogen inlet valve to adjust the nitrogen intake; follow the method of valve opening of 20% in the first 5 minutes, 50% in the middle 5 minutes, and 100% in the last 5 minutes, and gradually increase the purging intensity step by step to achieve the cleaning effect; After 5 minutes of backflush cleaning, open four ash discharge valves, open two more after 5 minutes, and open the last two after another 5 minutes. After the purging is over, pack the collected dust impurities, etc. and transport them to the designated place. After each use, pay attention to flushing the ash discharge pipeline with water and drying it to avoid excessive ash accumulation affecting the next use.

Claims

1. A back-blowing filter element dust cleaning device, characterized in that: It includes an upper end cover (1), a backwashing rotor (2), a nozzle (3), a cylinder body (4), a lower end plate (6), an ash discharge pipeline and valve (8), a nitrogen inlet pipe and valve (10), and a cylinder body support (11). The cylinder body (4) is fixed on the cylinder body support (11). An upper end cover (1) is provided at the upper end of the cylinder body (4), and a lower end plate (6) is provided at the lower end of the cylinder body (4). The backwashing rotor (2) is arranged on the central axis of the cylinder body (4). The upper end of the backwashing rotor (2) is a closed structure. The lower end of the backwashing rotor (2) is connected to the nitrogen inlet pipe and valve (10). Three groups of nozzles (3) are provided on the backwashing rotor (2), and the three groups of nozzles (3) are evenly arranged in the circumferential direction. The backwashing rotor (2) is rotationally connected to the lower end plate (6) through a bearing, and an ash discharge pipeline and valve (8) are provided on the lower end plate (6).

2. The backwashing type filter element dust cleaning device according to claim 1, characterized in that: Each group of nozzles (3) has 8 - 12 nozzles arranged at equal intervals up and down.

3. The back-blowing type filter element dust cleaning device according to claim 1, characterized in that: Circular bosses for cooperating with the filter element (5) are respectively provided on the upper end cover (1) and the lower end plate (6).

4. The backflush type filter element dust cleaning device according to claim 1, characterized in that: The size of the cylinder body (4) matches the size of the filter element (5).

5. The back-blowing type filter element dust cleaning device according to claim 1, characterized in that: The bearing includes a rolling bearing (7) and an axial thrust bearing (9) installed in a bearing body. The rolling bearing (7) is located in the upper part, and the axial thrust bearing (9) is located in the lower part.

6. The backflush type filter element dust cleaning device according to claim 5, characterized in that: The diameter of the central opening of the bearing body is the same as the inner diameter of the bearing, and the outside of the center of the bearing body is welded to the nitrogen inlet pipe and valve (10).

7. The backflush filter element dust cleaning device according to claim 1, characterized in that: There are eight ash discharge pipelines and valves (8) on the lower end plate (6) arranged in the circumferential direction of the lower end plate (6).

8. A method for backwashing a filter element to remove dust, characterized in that: When using a backwashing type filter element dust cleaning device defined in claims 1 - 7 to backwash and clean the filter element (5), first install the filter element (5) into the cylinder body (4) of the device and place it on the circular boss of the lower end plate (6). Adjust the distance between the three groups of nozzles (3) of the backwashing rotor (2) and the inner wall of the filter element (5). Press the upper end face of the filter element (5) with the corresponding circular boss of the upper end cover (1), and fix the upper end cover (1) firmly with four bolts. Close the ash discharge pipeline and valve (8) on the lower end plate (6), open the nitrogen inlet pipe and valve (10), and blow the filter element (5).

9. A backflush filter element dust cleaning method according to claim 8, characterized in that: After blowing the filter element (5), open the ash discharge pipeline and valve (8) to collect dust and impurities into a dust collection bag.

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