A kind of power station boiler last stage superheater tube oxide skin pickling liquid pool

Abstract

The utility model provides a kind of liquid pool for electric station boiler last stage superheater tube oxide skin pickling, comprising: pool body, lifting device, mounting frame, filter plate and moving device;Lifting device is fixedly installed on the surface of pool body, and the top of mounting frame is fixedly installed on the output end of lifting device, and filter plate is arranged in the inside of mounting frame;Moving device includes two moving grooves, two moving blocks, two clamping grooves, two clamping blocks, moving plate and fixing piece, and two moving grooves are all opened in the inside of mounting frame.The utility model provides a kind of liquid pool for electric station boiler last stage superheater tube oxide skin pickling, filter plate can be taken out from the inside of pool body by lifting device, and after supporting, filter plate is pulled to one side by moving device, so that it moves to moving position to one side, and can be downwardly rotated and inclined, so that staff can conveniently pull out filter plate after cleaning filter plate.

Description

Technical Field

[0001] This utility model relates to the field of pickling, and in particular to a storage tank for pickling oxide scale on the tubes of the final stage superheater of a power plant boiler. Background Technology

[0002] The boiler is a supercritical, variable-pressure spiral coil once-through boiler with a single furnace, tangential combustion at the four corners, and one intermediate reheat. It is a Π-type coal-fired boiler. Both units were officially put into operation in December 2009. The main steam design pressure is 25.4 MPa.g, and the temperature is 571℃. The final reheater steam design pressure is 4.6 MPa, and the temperature is 569℃. The final superheater tube panels are arranged in a counter-current manner after the curtain tubes of the water-cooled wall on the rear wall of the horizontal flue furnace. The final superheater tube panels use a material combination of T23+T91+TP347H, totaling 82 panels with 13 coils of tubes per panel. The final reheater tube panels are arranged at the leading edge of the smoke-shielding angle of the horizontal flue, totaling 33 panels with 33×20 coils of U-shaped tubes. The final reheater uses a material combination of T23+T91+TP304H+TP347H. Boiler No. 1 has an operating time of 100,000 hours. The original boiler design T23 / T91 has an extreme allowable operating temperature of 593℃ / 650℃. TP304H and TP347H are both coarse-grained austenitic stainless steel.

[0003] The prior art patent application with publication number CN217023790U describes a method that involves first filling the tank with pickling solution, then covering it with a top cover onto a receiving block on the inner wall of the tank. This prevents harmful gases from escaping into the external environment and causing harm to humans or pollution. An exhaust pipe is installed on the outside of the tank to release harmful gases, preventing the accumulation of gases and excessive internal pressure. Multiple sets of limiting rods are installed on the inner wall of the tank, and a filter plate is placed within the area formed by these rods. The filter plate is located at the bottom of the tank and is made of polytetrafluoroethylene (PTFE), which has strong acid resistance. When the pickling solution reacts with the tank, it corrodes the inner wall, forming corrosion products that fall onto the filter plate. By pulling the filter plate upwards with a lever, it can be moved to the top of the tank, removing the corrosion products. This effectively removes impurities caused by the pickling solution corrosion, improving the purity of the pickling solution.

[0004] However, after the filter plate is moved upwards and removed, impurities will adhere to the center of the filter plate. The filter plate needs to be completely removed before it can be cleaned, which makes it inconvenient for staff to clean it.

[0005] Therefore, it is necessary to provide a storage tank for acid washing of oxide scale on the final stage superheater tubes of a power plant boiler to solve the above-mentioned technical problems. Utility Model Content

[0006] This utility model provides a storage tank for acid washing of oxide scale on the tubes of the final stage superheater in a power plant boiler, which solves the problem that impurities adhere to the center of the filter plate after it is moved upward and removed, making it inconvenient for workers to clean it.

[0007] To solve the above-mentioned technical problems, this utility model provides a storage tank for acid washing of oxide scale on the final stage superheater tubes of a power plant boiler, comprising: a tank body, a lifting device, a mounting frame, a filter plate, and a moving device;

[0008] The lifting device is fixedly installed on the surface of the pool body, the top of the mounting frame is fixedly installed on the output end of the lifting device, and the filter plate is disposed inside the mounting frame;

[0009] The moving device includes two moving slots, two moving blocks, two slots, two locking blocks, a moving plate, and a fixing component. The two moving slots are all opened inside the mounting frame. The two moving blocks are slidably connected to the interior of the two moving slots. The two slots are all opened inside the mounting frame. The two locking blocks are slidably connected to the interior of the two slots. The moving plate is disposed inside the mounting frame. The fixing component is disposed inside the mounting frame.

[0010] Preferably, one side of the filter plate is rotatably connected to one side of the two movable blocks, while the other side is fixedly connected to one side of the two locking blocks.

[0011] Preferably, the lifting device includes multiple lifting components, a sealing plate, and multiple connecting rods. The multiple lifting components are respectively fixedly connected to both sides of the two ends of the pool body. The bottom of the sealing plate is fixedly connected to the output end of the multiple lifting components, and one end of each of the multiple connecting rods is fixedly connected to the bottom of the sealing plate.

[0012] Preferably, the pool body is provided with a sliding device inside, the sliding device including a sliding groove and a sliding block, the sliding groove is opened inside the pool body, and one side of the sliding block is fixedly connected to one side of the mounting frame.

[0013] Preferably, a support frame is fixedly connected to the top of the mounting frame, and the support frame has multiple drainage grooves inside.

[0014] Preferably, a limiting block is slidably connected inside the drainage channel, and a limiting frame is fixedly connected to the top of the limiting block.

[0015] Preferably, the drainage channel is provided with a limiting member inside, which is used to limit the limiting block.

[0016] Compared with related technologies, the storage tank for acid washing of oxide scale on the final stage superheater tubes of a power plant boiler provided by this utility model has the following beneficial effects:

[0017] This utility model provides a storage tank for acid washing of oxide scale on the final stage superheater tubes of a power plant boiler. A filter plate can be removed from the inside of the tank by a lifting device and supported. The filter plate can be pulled to one side by a moving device and moved to a moving position. It can then be rotated downwards and tilted, making it convenient for workers to pull out the filter plate and clean it. Attached Figure Description

[0018] Figure 1 A schematic diagram of the structure of a first embodiment of a storage tank for acid washing of oxide scale on the tubes of the final stage superheater of a power plant boiler provided by this utility model;

[0019] Figure 2 for Figure 1 The diagram shows a cross-sectional view of the mounting frame.

[0020] Figure 3 for Figure 2 The enlarged schematic diagram of part A shown below;

[0021] Figure 4 for Figure 2 The enlarged schematic diagram of section B is shown below;

[0022] Figure 5 This is a schematic diagram of the second embodiment of a storage tank for acid washing of oxide scale on the final stage superheater tubes of a power plant boiler, provided by this utility model.

[0023] The following are the labels in the diagram: 1. Pool body, 2. Lifting device, 21. Lifting component, 22. Sealing plate, 23. Connecting rod, 3. Mounting frame, 4. Filter plate, 5. Moving device, 51. Moving groove, 52. Moving block, 53. Slot, 54. Slot, 55. Moving plate, 56. Fixing component, 6. Sliding device, 61. Sliding groove, 62. Sliding block, 7. Support frame, 8. Drainage groove, 9. Limiting block, 10. Limiting frame, 11. Limiting component. Detailed Implementation

[0024] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0025] First Embodiment

[0026] Please refer to the following: Figure 1 , Figure 2 , Figure 3 and Figure 4 ,in, Figure 1A schematic diagram of the structure of a first embodiment of a storage tank for acid washing of oxide scale on the tubes of the final stage superheater of a power plant boiler provided by this utility model; Figure 2 for Figure 1 The diagram shows a cross-sectional view of the mounting frame. Figure 3 for Figure 2 The enlarged schematic diagram of part A shown below; Figure 4 for Figure 2 The enlarged schematic diagram of section B is shown. A storage tank for acid washing of oxide scale on the final stage superheater tubes of a power plant boiler includes: a tank body 1, a lifting device 2, a mounting frame 3, a filter plate 4, and a moving device 5;

[0027] The lifting device 2 is fixedly installed on the surface of the pool body 1, the top of the mounting frame 3 is fixedly installed on the output end of the lifting device 2, and the filter plate 4 is disposed inside the mounting frame 3;

[0028] The moving device 5 includes two moving slots 51, two moving blocks 52, two slots 53, two blocks 54, a moving plate 55, and a fixing member 56. The two moving slots 51 are all opened inside the mounting frame 3. The two moving blocks 52 are slidably connected to the inside of the two moving slots 51 respectively. The two slots 53 are all opened inside the mounting frame 3. The two blocks 54 are slidably connected to the inside of the two slots 53 respectively. The moving plate 55 is disposed inside the mounting frame 3. The fixing member 56 is disposed inside the mounting frame 3.

[0029] An exhaust pipe is fixedly connected to one side of the pool body 1.

[0030] The fastener 56 is a bolt. Both the locking block 54 and the mounting frame 3 have threaded holes that are compatible with the bolt. These holes are used to limit the locking block 54 after the bolt is installed into the threaded hole.

[0031] The fastener 56 can also be a lock, buckle, pin, etc.

[0032] The two sides of one end of the filter plate 4 are rotatably connected to one side of the two moving blocks 52, while the two sides of the other end are fixedly connected to one side of the two locking blocks 54.

[0033] The filter plate 4 includes a frame and a filter screen. The filter screen is fixedly installed inside the frame. The two sides of one end of the frame are rotatably connected to one side of the movable block 52, while the two sides of the other end are fixedly connected to one side of the two locking blocks 54.

[0034] The lifting device 2 includes multiple lifting components 21, a sealing plate 22, and multiple connecting rods 23. The multiple lifting components 21 are respectively fixedly connected to both sides of the pool body 1. The bottom of the sealing plate 22 is fixedly connected to the output end of the multiple lifting components 21. One end of each of the multiple connecting rods 23 is fixedly connected to the bottom of the sealing plate 22.

[0035] One end of each of the multiple connecting rods 23 is fixedly connected to the top of the mounting frame 3. After the lifting component 21 is activated, it drives the sealing plate 22 connected to the multiple connecting rods 23 to move, thereby driving the mounting frame 3 to move inside the pool body 1.

[0036] The lifting component 21 includes hydraulic rods, cylinders, electric push rods, etc.

[0037] The sealing plate 22 is used to seal the top of the pool body 1 after it comes into contact with the surface of the pool body 1.

[0038] A sealing gasket or sealing ring is fixedly installed at the bottom of the sealing plate 22.

[0039] The pool body 1 is provided with a sliding device 6, which includes a sliding groove 61 and a sliding block 62. The sliding groove 61 is opened inside the pool body 1, and one side of the sliding block 62 is fixedly connected to one side of the mounting frame 3.

[0040] The sliding block 62 is slidably connected to the inside of the sliding groove 61. When the mounting frame 3 moves, the sliding block 62 moves inside the sliding groove 61, thereby limiting the mounting frame 3 and increasing the stability of the mounting frame 3 when it moves.

[0041] The working principle of the storage tank for acid washing of oxide scale on the final stage superheater tubes of a power plant boiler provided by this utility model is as follows:

[0042] When it is necessary to clean the filter plate 4, the filter plate 4 is moved upward to a suitable position by the lifting device 2.

[0043] After removing the fastener 56, the moving plate 55 is pulled to one side, causing the filter plate 4 connected to the two moving blocks 52 to move inside the two moving slots 51 respectively. When the filter plate 4 moves to the appropriate position, one end of the filter plate 4 is moved downward, causing the filter plate 4 to tilt downward. At this time, the staff cleans the filter plate 4.

[0044] After the filter plate 4 is cleaned, move one end of the filter plate 4 upwards to be parallel with the mounting frame 3, then move the filter plate 4 to one side so that the two moving blocks 52 move to one side and reset inside the two moving slots 51 respectively. At the same time, insert the two locking blocks 54 into the two locking slots 53 respectively, and then install the fixing piece 56.

[0045] Compared with related technologies, the storage tank for acid washing of oxide scale on the final stage superheater tubes of a power plant boiler provided by this utility model has the following beneficial effects:

[0046] This utility model provides a storage tank for acid washing of oxide scale on the final stage superheater tubes of a power plant boiler. The filter plate 4 can be removed from the inside of the tank body 1 by the lifting device 2 and supported. The filter plate 4 can be pulled to one side by the moving device 5. After moving to the moving position, it can be rotated downward and tilted, so that the staff can easily pull out the filter plate 4 and clean it.

[0047] Second Embodiment

[0048] Please refer to the following: Figure 5 Based on the first embodiment of this application, which provides a storage tank for acid washing of oxide scale on the final stage superheater tubes of a power plant boiler, the second embodiment of this application proposes another storage tank for acid washing of oxide scale on the final stage superheater tubes of a power plant boiler. The second embodiment is merely a preferred embodiment of the first embodiment, and the implementation of the second embodiment will not affect the separate implementation of the first embodiment.

[0049] Specifically, the second embodiment of this application provides a storage tank for acid washing of oxide scale on the final stage superheater tubes of a power plant boiler, which is different in that it also includes a support frame 7, which is fixedly connected to the top of the mounting frame 3, and the support frame 7 has multiple drainage grooves 8 inside.

[0050] The drainage channel 8 is internally connected to a limiting block 9, and the top of the limiting block 9 is fixedly connected to a limiting frame 10.

[0051] The limit frame 10 has multiple V-shaped slots inside, which are used to limit the pipes placed on the limit frame 10.

[0052] The drainage channel 8 is provided with a limiting member 11, which is used to limit the limiting block 9.

[0053] The limiting component 11 is a limiting frame, which is adapted to the limiting block 9. The limiting frame is fixedly connected to the inside of the drainage trough 8. It is used to limit the limiting block 9 after it is inserted into the inside of the limiting frame, thereby limiting the limiting frame 10 and making it convenient to adjust the limiting frame 10 to a suitable position.

[0054] The drainage channel 8 has multiple limiting frames for internal fixed connection.

[0055] Limiting component 11 can also be a buckle, lock, bolt, etc.

[0056] The working principle of the storage tank for acid washing of oxide scale on the final stage superheater tubes of a power plant boiler provided by this utility model is as follows:

[0057] In use, the final stage superheater tubes are supported by placing them on the limiting frame 10.

[0058] When the position of the limiting frame 10 needs to be adjusted, the limiting block 9 at the bottom of the limiting frame 10 is inserted into the drainage groove 8 and simultaneously located inside the limiting member 11 to limit the position of the limiting frame 10.

[0059] Compared with related technologies, the storage tank for acid washing of oxide scale on the final stage superheater tubes of a power plant boiler provided by this utility model has the following beneficial effects:

[0060] This utility model provides a storage tank for acid washing of oxide scale on the final stage superheater tubes of a power plant boiler. The support frame 7 and the limiting frame 10 limit the final stage superheater tubes, thereby increasing their stability when moving up and down and preventing collisions between them.

[0061] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A storage tank for acid washing of oxide scale on the final stage superheater tubes of a power plant boiler, characterized in that, include: Pool body, lifting device, mounting frame, filter plate and moving device; The lifting device is fixedly installed on the surface of the pool body, the top of the mounting frame is fixedly installed on the output end of the lifting device, and the filter plate is disposed inside the mounting frame; The moving device includes two moving slots, two moving blocks, two slots, two locking blocks, a moving plate, and a fixing component. The two moving slots are all opened inside the mounting frame. The two moving blocks are slidably connected to the interior of the two moving slots. The two slots are all opened inside the mounting frame. The two locking blocks are slidably connected to the interior of the two slots. The moving plate is disposed inside the mounting frame. The fixing component is disposed inside the mounting frame.

2. The storage tank for acid washing of oxide scale on the final stage superheater tubes of a power plant boiler according to claim 1, characterized in that, One end of the filter plate is rotatably connected to one side of the two movable blocks on both sides, while the other end is fixedly connected to one side of the two locking blocks on both sides.

3. The storage tank for acid washing of oxide scale on the final stage superheater tubes of a power plant boiler according to claim 1, characterized in that, The lifting device includes multiple lifting components, a sealing plate, and multiple connecting rods. The multiple lifting components are respectively fixedly connected to both sides of the pool body. The bottom of the sealing plate is fixedly connected to the output end of the multiple lifting components. One end of each of the multiple connecting rods is fixedly connected to the bottom of the sealing plate.

4. A storage tank for acid washing of oxide scale on the final stage superheater tubes of a power plant boiler according to claim 1, characterized in that, The pool body is equipped with a sliding device, which includes a sliding groove and a sliding block. The sliding groove is opened inside the pool body, and one side of the sliding block is fixedly connected to one side of the mounting frame.

5. A storage tank for acid washing of oxide scale on the final stage superheater tubes of a power plant boiler according to claim 1, characterized in that, A support frame is fixedly connected to the top of the mounting frame, and multiple drainage grooves are provided inside the support frame.

6. A storage tank for acid washing of oxide scale on the final stage superheater tubes of a power plant boiler according to claim 5, characterized in that, The drainage channel is internally connected to a limiting block, and the top of the limiting block is fixedly connected to a limiting frame.

7. A storage tank for acid washing of oxide scale on the final stage superheater tubes of a power plant boiler according to claim 6, characterized in that, The drainage channel is equipped with a limiting component inside, which is used to limit the limiting block.

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