A primary air purification filter device for combustion engines

Abstract

The utility model belongs to the air treatment technical field of thermal power plant, concretely relates to a kind of gas turbine air purification primary filter device, including the frame for fixed installation in the air inlet of unit, multiple guide rails are horizontally provided on the frame, the guide rail is U-shaped structure, several filter components are arranged between the guide rail and guide rail, the filter component includes filter bag, the inside of filter bag is V-shaped structure, and the opening direction of filter bag corresponds with the direction of the air inlet of unit.The utility model solves the technical problem that the filter area of the existing technology under plate type primary air purification filter is smaller, the mode of dismounting filter plate is more cumbersome, and when replacing, dust attached on plate type primary air purification filter is easily shaken off, affecting the service life of subsequent cylinder type fine filtration air purification filter.

Description

Technical Field

[0001] This utility model belongs to the field of air treatment technology for thermal power plants, and specifically relates to a primary filtration device for gas turbine air purification. Background Technology

[0002] A gas turbine power plant is a circulating system composed of a gas turbine, generator, waste heat boiler, and steam turbine. It recovers the high-temperature exhaust gas from the gas turbine through the waste heat boiler, converting it into steam, which is then injected into the steam turbine to generate electricity. During operation, air filters are installed in the gas turbine to effectively remove dust from the air, ensuring the quality of the gas turbine's intake air and protecting the aerodynamic equipment from dust, thus extending equipment lifespan and ensuring stable and safe unit operation. Traditional gas turbine-steam combined cycle cogeneration units are generally equipped with plate-type primary air filters and cartridge-type fine air filters, handling dust particles larger than 10 microns and 0.4 microns respectively. However, in practice, it has been found that the plate-type primary air filter has a relatively small filtration area due to its plate structure, and the filter frame uses a pressure plate installation method, requiring unscrewing the nuts for disassembly and reassembly, which is time-consuming and labor-intensive. Furthermore, during the replacement and disassembly of the plate-type primary air filter, dust from the filter plate easily falls off and adheres to the subsequent cartridge-type fine air filter, causing secondary pollution. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a primary air purification filter for gas turbines, in order to solve the technical problems of existing plate-type primary air purification filters having a small filtration area, cumbersome filter plate disassembly and assembly, and dust adhering to the plate-type primary air purification filter being easily shaken off during replacement, affecting the service life of subsequent cartridge-type fine air purification filters.

[0004] To solve the above-mentioned technical problems, embodiments of this utility model provide a primary air purification filtration device for gas turbines, including a frame for fixed installation at the air inlet of the unit. Multiple guide rails are horizontally arranged on the frame. The guide rails have an H-shaped structure. Several filter components are arranged between the guide rails. Each filter component includes a filter bag. The filter bag has a V-shaped internal structure, and the opening direction of the filter bag corresponds to the direction of the air inlet of the unit.

[0005] The guide rail is provided with an installation component at its end. The installation component includes a movable part. The movable part has a rectangular cylindrical structure in the transverse direction. A sliding groove is provided on the surface of the movable part. A bolt with a wing nut at the end is provided in the sliding groove. The bolt is fixedly connected to the frame. The movable part moves in the sliding groove with the shank of the bolt and abuts against the filter component.

[0006] The filter assembly further includes a side frame and a clamping frame. Both the side frame and the clamping frame have openings. The opening of the side frame is provided with a clamping groove, and the opening of the clamping frame is provided with a protrusion. The clamping groove and the protrusion correspond to each other. The side frame and the clamping frame are used to clamp the filter bag.

[0007] The clamping frame also has threaded holes through its sides, and the side of the side frame is provided with threaded rods that are adapted to the threaded holes.

[0008] Rubber pads are also provided on both sides of the side frame and clamping frame.

[0009] A sealing strip is provided between the filter assembly and the installation assembly, and both ends of the sealing strip are interference-fitted with the guide rail.

[0010] The beneficial effects of the above-mentioned technical solution of this utility model are as follows: This invention replaces the original plate filter structure with a bag filter structure, increasing the filtration area and helping to trap dust during disassembly, thus preventing secondary pollution. The guide rail and mounting components also facilitate the disassembly and replacement of the bag filter components, which can be completed without the assistance of other tools, making it convenient for staff to replace or maintain the filter components. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the primary air purification filter for a medium-speed combustion engine according to this utility model. Figure 2 This is a schematic diagram of the frame structure in this utility model; Figure 3 for Figure 2 A schematic diagram of A in the middle; Figure 4 This is a schematic diagram of the side frame and clamping frame in this utility model.

[0012] Explanation of reference numerals in the attached figures: 1. Frame; 2. Guide rail; 3. Filter assembly; 301. Filter bag; 302. Side frame; 303. Clamping frame; 304. Threaded hole; 305. Threaded rod; 306. Clamping groove; 307. Protrusion; 308. Rubber pad; 4. Mounting assembly; 401. Moving part; 402. Sliding groove; 403. Bolt; 404. Wing nut; 5. Sealing strip. Detailed Implementation

[0013] To make the technical problems, technical solutions and advantages of this utility model clearer, a detailed description will be given below in conjunction with the accompanying drawings and specific embodiments.

[0014] like Figure 1 , Figure 2As shown, an embodiment of this utility model provides a primary air purification filtration device for a gas turbine, including a frame 1 for fixed installation at the air inlet of the unit. Multiple guide rails 2 are horizontally arranged on the frame 1. The guide rails 2 have an H-shaped structure. A plurality of filter components 3 are arranged between the guide rails 2. The filter components 3 include filter bags 301. The filter bags 301 have a V-shaped internal structure, and the opening direction of the filter bags 301 corresponds to the direction of the air inlet of the unit.

[0015] In this embodiment, the V-shaped structure inside the filter bag 301 significantly increases the filtration area compared to the plate-type filter structure. The V-shaped structure ensures uniform and stable airflow through the filter bag 301, preventing turbulence and increased pressure differential. Furthermore, the V-shaped structure prevents the filter bags 301 from squeezing each other during operation, further increasing the effective filtration area. The bag filter structure also helps trap dust during disassembly, reducing the risk of secondary contamination.

[0016] like Figure 3 As shown, the end of the guide rail 2 is provided with a mounting component 4. The mounting component 4 includes a movable part 401. The movable part 401 has a rectangular cylindrical structure in the transverse direction. A sliding groove 402 is provided on the surface of the movable part 401. A bolt 403 with a wing nut 404 at the end is provided in the sliding groove 402. The bolt 403 is fixedly connected to the frame 1. The movable part 401 moves in the sliding groove 402 with the rod of the bolt 403 and abuts against the filter component 3.

[0017] It should also be noted that the aforementioned multiple guide rails 2 are fixedly connected to the frame 1 using bolts 403 in the mounting assembly 4. During installation, the movable part 401 is first fitted onto the end of the guide rail 2, and then the guide rail 2 is fixedly connected to the frame 1 by the bolts 403 passing through the sliding groove 402. In use, the movable part 401 moves towards the filter assembly 3 within the sliding groove 402 along with the rod of the bolt 403, thereby abutting against the filter assembly 3 and being further fixed by the wing nut 404. During disassembly and assembly, the wing nut 404 is loosened, and the movable part 401 is moved away using the sliding groove 402, thus achieving push-pull disassembly and assembly.

[0018] In this embodiment, one end of the guide rail 2 is installed using a push-pull mounting assembly 4, while the other end is fixedly connected only by bolts 403 and sealed by a sealing strip 5. like Figure 4As shown, the filter assembly 3 further includes a side frame 302 and a clamping frame 303. Both the side frame 302 and the clamping frame 303 have openings. The opening of the side frame 302 has a clamping groove 306, and the opening of the clamping frame 303 has a protrusion 307. The clamping groove 306 corresponds to the protrusion 307. The side frame 302 and the clamping frame 303 cooperate to clamp the filter bag 301. A threaded hole 304 is also provided through the side of the clamping frame 303, and a threaded rod 305 is correspondingly provided on the side of the side frame 302. The threaded rod 305 is adapted to the threaded hole 304. In this embodiment, rubber pads 308 are also provided on both sides of the side frame 302 and the clamping frame 303. After the filter bag 301 is fixed in place by the side frame 302 and the clamping frame 303, it is placed in the guide rail 2, and the filter assemblies 3 are sealed together by the rubber pads 308.

[0019] When replacing the filter bag 301, place the end of the filter bag 301 into the clamping groove 306 at the opening of the side frame 302, and then use the protrusion 307 of the clamping frame 303 to insert into the clamping groove 306 to quickly and firmly fix the filter bag 301. Finally, after threading the threaded rod 305 to the threaded hole 304, the filter bag 301 can be fixed in the side frame 302 and the clamping frame 303.

[0020] A sealing strip 5 is also provided between the filter component 3 and the installation component 4, and the two ends of the sealing strip 5 are press-fitted with the guide rail 2 to achieve a seal and ensure that air leakage does not cause air short circuit.

[0021] The installation process and working principle of this utility model are as follows: The frame 1 is installed on the compressor intake support structure. The movable part 401 is fitted onto the end of the guide rail 2, and then the guide rail 2 is fixedly connected to the frame 1 by bolts 403 passing through the sliding groove 402, thus completing the installation of the guide rail 2. The end of the filter bag 301 is placed in the clamping groove 306 at the opening of the side frame 302. Then, the protrusion 307 of the clamping frame 303 is inserted into the clamping groove 306 to fix the filter bag 301 in the side frame 302 and the clamping frame 303. Then, the fixed filter bag 301 is inserted into the guide rail 2. Multiple filter bags 301 are laterally distributed between the guide rails 2 and sealed by rubber gaskets 308. After the installation of multiple filter bags 301 is completed, a sealing strip 5 is attached to the end. Then, the movable part 401 is abutted against the sealing strip 5 and fixed by the wing nut 404. This completes the installation of the gas turbine air purification primary filtration device. When replacement or repair is needed, loosen the wing nut 404, move the movable part 401 along the sliding groove 402, tear off the sealing strip 5 and take out the filter bag 301 along the guide rail 2, and replace the filter bag 301.

[0022] The following will further elaborate on this point with specific examples.

[0023] Example 1 The aforementioned primary air filtration device for gas turbines is installed on the existing compressor intake support structure without requiring any changes to the existing intake support structure. Frame 1 is made of national standard 304 stainless steel with a thickness of not less than 2.0mm. The gap between the primary air filtration device and the original steel frame structure is sealed with a sealing strip.

[0024] In this embodiment, during actual operation, it was found that the pressure differential of the bag filter structure is reduced by approximately 30% compared to the plate filter structure, which helps reduce compressor operation and thus improves the unit's operating rate. Meanwhile, in terms of technical parameters, the bag filter area is 4.2m². 2 The plate filter area is 1.4m². 2 This improves efficiency by approximately 67%, and extends the service life of the bag filter structure by more than 50%, allowing it to operate for 4000~4500 hours. Specific technical parameters are compared in Table 1 below.

[0025] Table 1. Comparison of Technical Parameters between Bag Filter Structures and Plate Filter Structures .

[0026] In summary, this utility model, by replacing the original plate filter structure with a bag filter structure, increases the filtration area and also helps to trap dust during disassembly, preventing secondary pollution. At the same time, the push-pull installation of the guide rail and mounting components facilitates the disassembly and replacement of the bag filter components. Disassembly and replacement can be completed without the assistance of other tools, making it convenient for staff to replace or maintain the filter components.

[0027] The above description is the preferred embodiment of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this utility model, and these improvements and modifications should also be considered within the protection scope of this utility model.

Claims

1. A primary filtration device for gas turbine air purification, characterized in that, It includes a frame for fixed installation at the air inlet of the unit, with multiple guide rails arranged horizontally on the frame. The guide rails have an H-shaped structure, and several filter components are arranged between the guide rails. Each filter component includes a filter bag with a V-shaped internal structure, and the opening direction of the filter bag corresponds to the direction of the air inlet of the unit.

2. The primary air filtration device for gas turbines according to claim 1, characterized in that, The guide rail is provided with an installation component at its end. The installation component includes a movable part. The movable part has a rectangular cylindrical structure in the transverse direction. A sliding groove is provided on the face of the movable part. A bolt with a wing nut at the end is provided in the sliding groove. The bolt is fixedly connected to the frame. The movable part moves in the sliding groove with the shank of the bolt and abuts against the filter component.

3. The primary air filtration device for gas turbines according to claim 1, characterized in that, The filter assembly also includes a side frame and a clamping frame. Both the side frame and the clamping frame have openings. The opening of the side frame is provided with a clamping groove, and the opening of the clamping frame is provided with a protrusion. The clamping groove and the protrusion correspond to each other. The side frame and the clamping frame are used to clamp the filter bag.

4. The primary air filtration device for gas turbines according to claim 3, characterized in that, The side of the clamping frame is also provided with threaded holes, and the side of the side frame is provided with threaded rods, which are adapted to the threaded holes.

5. The primary air filtration device for gas turbines according to claim 3, characterized in that, Rubber pads are also provided on both sides of the side frame and clamping frame.

6. The primary air filtration device for gas turbines according to claim 1, characterized in that, A sealing strip is also provided between the filter assembly and the installation assembly, and both ends of the sealing strip are interference-fitted with the guide rail.

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