Tail gas dehumidification device for thermal power plant

Abstract

The invention discloses a tail gas dehumidification device for a thermal power plant, and belongs to the technical field of thermal power plant tail gas treatment. The device comprises a supporting frame and a dehumidifier, the dehumidifier is fixedly installed at the top end of the supporting frame, air inlet pipes symmetrically penetrate through and are fixedly connected to the side wall of one side of the dehumidifier, a moisture absorption component is installed in the dehumidifier, a replacement assembly is installed at the top end of the dehumidifier, and auxiliary assemblies are symmetrically installed on the side wall of the dehumidifier. And a repairing assembly is mounted in each air inlet pipe. By arranging the auxiliary assembly, before the first moisture absorption cotton is replaced, electromagnets in the second mounting boxes on the two sides are powered on, so that the electromagnets generate magnetic poles with the same polarity as the adjacent surfaces of permanent magnets, and then third moisture absorption cotton in each second mounting box is pushed to be close to each other under the action of magnetic repulsive force; complete moisture absorption cotton is formed between the first moisture absorption cotton and the air inlet pipe, auxiliary dehumidification is conducted through the third moisture absorption cotton, and the tail gas dehumidification effect is ensured.

Description

Technical Field

[0001] The invention belongs to the technical field of tail gas treatment in thermal power plants, and in particular relates to a tail gas dehumidification device for thermal power plants. Background Art

[0002] The impact of moisture on thermal power plant equipment cannot be ignored. Moisture can penetrate into the equipment, causing problems such as circuit board short circuit and insulation aging. In severe cases, it can even cause large-scale power outages in the power system. Especially in key equipment such as substations and switch cabinets, the harm of moisture is particularly obvious, which may cause equipment failure, current leakage, arcing and short circuit, threatening the overall safety of the power system.

[0003] Chinese patent CN114345088B discloses a tail gas dehumidification device for a thermal power plant, which includes a filter module, the filter module includes a dust filter component and a recoil component, the recoil component is arranged in the dust filter component; and a heat absorption module, the heat absorption module is movably connected to the filter module, the heat absorption module includes a water storage component, a heat absorption component and a start-up component, the heat absorption component and the start-up component are both movably connected to the water storage component; and a dehumidification module. The device double dehumidifies the moisture in the tail gas through the pre-dehumidification component and the moisture absorption component, avoiding the tail gas carrying too much moisture into the next process to affect the treatment quality of the tail gas, and through the use of the transmission component, the tail gas can be effectively transmitted, ensuring the stable transmission of the tail gas and avoiding the phenomenon of tail gas backflow.

[0004] At present, during the exhaust gas dehumidification process, the hygroscopic cotton cannot be used continuously, and when it is replaced, the device needs to be shut down and then disassembled and replaced. If the dehumidification effect of the hygroscopic cotton is not good during the dehumidification process and it cannot be replaced in time, the exhaust gas dehumidification effect will be affected and there will be safety hazards. In addition, during the dehumidification operation, the process of replacing the first hygroscopic cotton will inevitably affect the dehumidification effect, resulting in a high water vapor content in the exhaust gas, affecting the dehumidification effect. Moreover, during the exhaust gas dehumidification process of the thermal power plant, metal corrosion will occur on the inner wall of the air inlet pipe, because the corrosion will destroy the smoothness of the metal surface inside the air inlet pipe, increase friction and resistance, thereby affecting the dehumidification efficiency.

[0005] Therefore, we proposed an exhaust gas dehumidification device for thermal power plants in order to solve the above-mentioned problems. Summary of the invention

[0006] In view of the problem that the desiccant cotton in the prior art cannot be used continuously and cannot be replaced during the exhaust gas dehumidification process, and that the dehumidification effect will be affected during the replacement of the first desiccant cotton, and metal corrosion will occur on the inner wall of the air inlet pipe, affecting the dehumidification efficiency, the purpose of the present invention is to provide an exhaust gas dehumidification device for a thermal power plant.

[0007] In order to solve the above problems, the technical solution adopted by the present invention is as follows: a tail gas dehumidification device for a thermal power plant, comprising a support frame and a dehumidifier, the dehumidifier is fixedly installed on the top of the support frame, an air inlet pipe is symmetrically penetrated and fixedly connected to the side wall of one side of the dehumidifier, two of the air inlet pipes are commonly fixedly connected to a guide pipe, and an air outlet pipe is penetrated and fixedly connected to the side wall of the other side of the dehumidifier, a feed hole is opened at the top of the dehumidifier, and a discharge hole is opened at the bottom of the dehumidifier, the feed hole and the discharge hole are located in the same vertical plane, the inner walls of the feed hole and the discharge hole are both sealed and slidably connected with a first sealing plate, and the two first sealing plates are commonly fixedly connected with a first moisture-absorbing cotton, a moisture-absorbing component is installed inside the dehumidifier, a replacement component is installed at the top of the dehumidifier, auxiliary components are symmetrically installed on the side walls of the dehumidifier, and a repair component is installed inside each of the air inlet pipes.

[0008] Furthermore, the replacement component includes a first installation box, which is fixedly connected to the top of the dehumidifier. A plurality of second moisture-absorbing cottons are slidably connected inside the first installation box, and the top and bottom ends of each of the second moisture-absorbing cottons are fixedly connected to a second sealing plate.

[0009] Furthermore, each of the second sealing plates is slidably connected to the inner bottom wall of the first installation box, the inner side wall of the first installation box is symmetrically fixedly connected with a first spring, and multiple first springs are commonly fixedly connected with a first push plate, and the first push plate is in contact with the adjacent second moisture-absorbing cotton side wall.

[0010] Furthermore, the top of the first installation box is symmetrically fixedly connected with electric push rods, the movable end of each electric push rod is slidably connected to the top of the first installation box, the movable ends of the two electric push rods are commonly fixedly connected with a second push plate, and the bottom end of the second push plate is in contact with the top of the adjacent first sealing plate.

[0011] Furthermore, the auxiliary component includes two second installation boxes, and the two second installation boxes are symmetrically fixedly connected to the side walls of the dehumidifier. The side walls of the dehumidifier are symmetrically provided with rectangular holes, each of the rectangular holes is located inside the second installation box, and the inner side walls of each second installation box are symmetrically fixedly connected with a second spring.

[0012] Furthermore, multiple second springs are commonly fixedly connected to a connecting plate, the inner side wall of each second installation box is fixedly connected to an electromagnet, each side wall of the connecting plate is fixedly connected to a permanent magnet, and each second installation box is slidably connected to a third moisture-absorbing cotton, and the side walls on both sides of the third moisture-absorbing cotton are symmetrically fixedly connected to third sealing plates, one of the third sealing plates is sealingly and slidably connected to the inner wall of the rectangular hole, and the other third sealing plate is fixedly connected to an adjacent third sealing plate.

[0013] Furthermore, the repair component includes two mounting rings, each of which is slidably connected to the inside of the corresponding air inlet pipe, the interior of the mounting ring is a hollow structure, the outer wall of the mounting ring is provided with a groove body, the inner bottom wall of the groove body is provided with first circular holes at equal angles, a one-way discharge valve is installed in each of the first circular holes, a side wall of one side of the mounting ring is provided with second circular holes at equal angles, a second control valve is installed in each of the second circular holes, the inner wall of the mounting ring is symmetrically fixedly connected with a third spring, and one end of multiple third springs is commonly fixedly connected to a sealing ring.

[0014] Furthermore, the sealing ring is sealingly and slidingly connected to the inside of the mounting ring, a feeding hole is opened on the inner wall of the mounting ring, a first control valve is installed inside the feeding hole, a fourth spring and a bellows are symmetrically and fixedly connected to the side wall on the other side of the mounting ring, each of the fourth spring and the bellows is fixedly connected to the inner wall of the adjacent air inlet pipe, each of the side walls of the bellows is fixedly connected to a pressure relief pipe, and one end of the pressure relief pipe is penetrated and fixedly connected to the side wall of the adjacent air inlet pipe.

[0015] Furthermore, a pressure relief valve is installed inside the pressure relief pipe, a fixing plate is fixedly connected to the side wall of the support frame, an airbag is fixedly connected to the top of the fixing plate, a support spring is symmetrically fixedly connected to the top of the fixing plate, a plurality of support springs are commonly fixedly connected to a pull plate, a bottom end of the pull plate is fixedly connected to the top of the airbag, and a catheter is fixedly connected to the side wall of one side of the airbag.

[0016] Furthermore, a third control valve is installed inside the catheter, a second connecting pipe is fixedly connected to the other side wall of the airbag, a one-way exhaust valve is installed inside the second connecting pipe, one end of the second connecting pipe is symmetrically fixedly connected to the first connecting pipe, each of the first connecting pipes is a U-shaped structure, and two ports of the first connecting pipe pass through the adjacent side walls of the air inlet pipe and are fixedly connected to the corresponding bellows.

[0017] Compared with the prior art, the present invention has the following beneficial effects: By setting a replacement component and starting the electric push rod, the second push plate will be driven to move downward. During the downward movement, the first hygroscopic cotton is pushed downward synchronously by the second push plate to push the first hygroscopic cotton out along the discharge hole, and the first hygroscopic cotton is squeezed to shrink the first hygroscopic cotton until the first hygroscopic cotton is completely pushed out from the inside of the dehumidifier, and then the electric push rod shrinks until it moves close to the top wall of the first installation box. At this time, the side wall of the movable end of the electric push rod releases the limit of the second hygroscopic cotton, and under the elastic action of the first spring, the first push plate is used to push multiple second hygroscopic cottons to move forward, so that the adjacent second hygroscopic cottons move above the feed hole, and then the movable end of the electric push rod is extended again, pushing the second hygroscopic cotton to pass through the feed hole and enter the inside of the dehumidifier until the second sealing plate at the bottom of the second hygroscopic cotton enters the inside of the discharge hole to complete the replacement; the device can also replace the first hygroscopic cotton without affecting the exhaust gas dehumidification process. Compared with the prior art, the device needs to be closed and then disassembled and replaced. The device is more convenient and practical, and the practicality of the device is improved; By setting up an auxiliary component, before the first moisture-absorbing cotton is replaced, the electromagnets inside the second installation boxes on both sides are energized, so that the electromagnets generate magnetic poles with the same polarity as the adjacent surfaces of the permanent magnets, thereby pushing the third moisture-absorbing cotton inside each second installation box closer to each other under the action of magnetic repulsion. At this time, the second spring is in a stretched state until the adjacent surfaces of the two third moisture-absorbing cottons contact each other, forming a completed moisture-absorbing cotton between the first moisture-absorbing cotton and the air inlet pipe, and using the third moisture-absorbing cotton for auxiliary dehumidification to ensure that the effect of exhaust gas dehumidification is not affected; by setting up a repair component, metal appears on the inner wall of the air inlet pipe Corrosion, open the second control valve and the one-way discharge valve, the high temperature inside the air inlet pipe enters the inside of the mounting ring along the second circular hole, and the high temperature enters the right side of the sealing ring, heating the air on the right side of the sealing ring, increasing the pressure, thereby pushing the sealing ring to move to the left, and utilizing the generated pressure difference to discharge the anti-corrosion paint along the first circular hole. The anti-corrosion paint will fill the slot body, making the inside of the slot body full of anti-corrosion paint, so that after the anti-corrosion paint enters the slot body, it can quickly fill the slot body, contact with the inner wall of the air inlet pipe, and cooperate with the expansion of the bellows to move along the air inlet pipe, thereby repairing the anti-corrosion layer. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a rear view of the present invention; Figure 3 is a cross-sectional view of the present invention; Figure 4 for Figure 3 A partial enlarged schematic diagram of part A; Figure 5 is a cross-sectional view of the dehumidifier of the present invention; Figure 6It is a structural schematic diagram of the replacement component in the present invention; Figure 7 is a cross-sectional view of the auxiliary component in the present invention; Figure 8 It is a schematic diagram of the main structure of the auxiliary components in the present invention; Fig. 9 It is a schematic diagram of the structure of the repair component in the present invention; Fig.10 A side wall diagram of the repair component of the present invention; Fig.11 It is a schematic diagram of the structure of the mounting ring in the present invention; Fig.12 for Fig. 9 A partial enlarged schematic diagram of part B; Fig.13 It is a partial structural schematic diagram of the repair component in the present invention; Fig.14 for Fig.13 A partial enlarged schematic diagram of part C in the middle.

[0019] In the figure: 1. support frame; 2. dehumidifier; 21. air inlet pipe; 22. guide pipe; 23. air outlet pipe; 24. first moisture-absorbing cotton; 25. moisture-absorbing component; 26. discharge hole; 27. feed hole; 28. first sealing plate; 3. replacement component; 31. first installation box; 32. first spring; 33. first push plate; 34. second moisture-absorbing cotton; 35. second sealing plate; 36. electric push rod; 37. second push plate; 4. auxiliary component; 41. rectangular hole; 42. second installation box; 43. second spring; 44. connecting plate; 45. third sealing plate; 46. third moisture-absorbing cotton; 47. electromagnet ;48. Permanent magnet;5. Repair component;51. Mounting ring;52. Trough body;53. Feed hole;54. First control valve;55. First circular hole;56. One-way discharge valve;57. Third spring;58. Sealing ring;59. Fourth spring;510. Bellows;511. Second circular hole;512. Second control valve;513. Pressure relief pipe;514. Pressure relief valve;515. First connecting pipe;516. Second connecting pipe;517. One-way exhaust valve;518. Fixed plate;519. Support spring;520. Pull plate;521. Airbag;522. Catheter;523. Third control valve. DETAILED DESCRIPTION

[0020] The present invention is further described below in conjunction with specific embodiments.

[0021] In order to solve the problem that the dehumidifying cotton cannot be used continuously during the exhaust gas dehumidification process, and when replacing it, the device needs to be turned off and then disassembled and replaced. If the dehumidification effect of the dehumidifying cotton is not good during the dehumidification process and it cannot be replaced in time, the exhaust gas dehumidification effect will be affected, and there will be safety hazards, such as Figure 1- Figure 6 As shown: A tail gas dehumidification device for a thermal power plant comprises a support frame 1 and a dehumidifier 2, wherein the dehumidifier 2 is fixedly mounted on the top of the support frame 1, an air inlet pipe 21 is symmetrically penetrated and fixedly connected to the side wall of one side of the dehumidifier 2, and the two air inlet pipes 21 are fixedly connected to a guide pipe 22, and an air outlet pipe 23 is penetrated and fixedly connected to the side wall of the other side of the dehumidifier 2, and the tail gas is introduced into the dehumidifier 2 along the guide pipe 22 and the air inlet pipe 21, and the tail gas passes through the first moisture absorbing cotton 24 and the moisture absorbing component 25 in sequence, and is finally discharged through the air outlet pipe 23, and a feed hole 27 is provided at the top of the dehumidifier 2, and a discharge hole 26 is provided at the bottom of the dehumidifier 2, and the feed hole 27 is provided at the bottom of the dehumidifier 2, and the feed hole 27 is provided at the bottom of the dehumidifier 2, and the feed hole 27 is provided at the bottom of the dehumidifier 2, and the feed hole 27 is provided at the top ... The feed hole 27 and the discharge hole 26 are located in the same vertical plane. The inner walls of the feed hole 27 and the discharge hole 26 are sealed and slidably connected with the first sealing plate 28. The two first sealing plates 28 are commonly fixedly connected with the first hygroscopic cotton 24. A hygroscopic component 25 is installed inside the dehumidifier 2. The dehumidifier 2 used for exhaust gas dehumidification is the prior art. Its dehumidification principle is to pre-dehumidify the exhaust gas using the first hygroscopic cotton 24, and then further dehumidify it through the hygroscopic component 25: the hygroscopic component 25 includes a mesh frame and a hygroscopic sleeve. The hygroscopic sleeve is equidistantly arranged in the mesh frame for further absorbing moisture in the exhaust gas to achieve the purpose of exhaust gas dehumidification.

[0022] A replacement component 3 is installed at the top of the dehumidifier 2. By setting the replacement component 3 and starting the electric push rod 36, the second push plate 37 will be driven to move downward. During the downward movement, the first moisture-absorbing cotton 24 is pushed downward synchronously by the second push plate 37, and the first moisture-absorbing cotton 24 is pushed out along the discharge hole 26, and the first moisture-absorbing cotton 24 is squeezed to shrink until the first moisture-absorbing cotton 24 is completely pushed out from the inside of the dehumidifier 2. At this time, the first sealing plate 28 above the first moisture-absorbing cotton 24 will block the port of the discharge hole 26, and then the electric push rod 36 will shrink until it moves close to the top wall of the first installation box 31. At this time, the movable end side wall of the electric push rod 36 releases the second moisture-absorbing cotton The cotton 34 is limited, and under the elastic action of the first spring 32, the first push plate 33 is used to push the plurality of second moisture-absorbing cottons 34 forward, so that the adjacent second moisture-absorbing cottons 34 are moved to above the feed hole 27, and then the movable end of the electric push rod 36 is extended again, pushing the second moisture-absorbing cotton 34 to pass through the feed hole 27 and enter the dehumidifier 2 until the second sealing plate 35 at the bottom end of the second moisture-absorbing cotton 34 enters the discharge hole 26, and the replacement is completed; the present device can also replace the first moisture-absorbing cotton 24 without affecting the exhaust gas dehumidification process. Compared with the prior art, the device needs to be shut down and then disassembled and replaced. The present device is more convenient and practical, and the practicality of the device is improved.

[0023] The auxiliary components 4 are symmetrically installed on the side walls of the dehumidifier 2. By setting the auxiliary components 4, before the first hygroscopic cotton 24 is replaced, the electromagnets 47 inside the second installation boxes 42 on both sides are energized, so that the electromagnets 47 generate magnetic poles with the same polarity as the adjacent surfaces of the permanent magnets 48, thereby pushing the third hygroscopic cotton 46 inside each second installation box 42 closer to each other under the action of magnetic repulsion. At this time, the second spring 43 is in a stretched state until the adjacent surfaces of the two third hygroscopic cottons 46 contact each other, forming a completed hygroscopic cotton between the first hygroscopic cotton 24 and the air inlet pipe 21, and the third hygroscopic cotton 46 is used for auxiliary dehumidification to ensure that the exhaust gas dehumidification effect will not be significantly reduced. At this time, the first hygroscopic cotton 24 is replaced.

[0024] A repair component 5 is installed inside each air inlet pipe 21. By setting up the repair component 5, metal corrosion occurs on the inner wall of the air inlet pipe 21, and the second control valve 512 and the one-way discharge valve 56 are opened. The high temperature inside the air inlet pipe 21 enters the inside of the mounting ring 51 along the second circular hole 511, and the high temperature enters the right side of the sealing ring 58, heating the air on the right side of the sealing ring 58, increasing the pressure, thereby pushing the sealing ring 58 to move to the left, and utilizing the pressure difference to discharge the anti-corrosion paint along the first circular hole 55. The anti-corrosion paint will fill the groove body 52, so that the inside of the groove body 52 is filled with the anti-corrosion paint, so that after the anti-corrosion paint enters the groove body 52, the groove body 52 can be quickly filled, and contact with the inner wall of the air inlet pipe 21, and cooperate with the expansion of the bellows 510 to move along the air inlet pipe 21, thereby repairing the anti-corrosion layer.

[0025] The replacement component 3 includes a first installation box 31, which is fixedly connected to the top of the dehumidifier 2. A plurality of second moisture-absorbing cottons 34 are slidably connected inside the first installation box 31, and a second sealing plate 35 is fixedly connected to the top and bottom of each second moisture-absorbing cotton 34.

[0026] Each second sealing plate 35 is slidably connected to the inner bottom wall of the first installation box 31, the inner side wall of the first installation box 31 is symmetrically fixedly connected with the first spring 32, and multiple first springs 32 are commonly fixedly connected with the first push plate 33, and the first push plate 33 is in contact with the adjacent side wall of the second moisture-absorbing cotton 34.

[0027] The top of the first installation box 31 is symmetrically fixedly connected with an electric push rod 36, and the movable end of each electric push rod 36 is slidably connected to the top of the first installation box 31. The movable ends of the two electric push rods 36 are commonly fixedly connected with a second push plate 37, and the bottom end of the second push plate 37 is in contact with the top of the adjacent first sealing plate 28.

[0028] In this solution: the second moisture absorbent cotton 34 located inside the first installation box 31 is all for standby use, and the first moisture absorbent cotton 24 inside the dehumidifier 2 is all in working condition, and the second moisture absorbent cotton 34 is used to dehumidify the exhaust gas; when the first moisture absorbent cotton 24 is gradually saturated after long-term use, the adsorption capacity of the first moisture absorbent cotton 24 will gradually weaken, and it will no longer be able to effectively adsorb moisture in the exhaust gas; the electric push rod 36 is started, wherein the initial position of the electric push rod 36 is that the second push plate 37 at its active end is in contact with the top end of the first sealing plate 28, so that the active end of the electric push rod 36 will drive the second push plate 37 to move downward, and at the bottom During the dehumidification process, the first moisture absorbent cotton 24 is pushed downward synchronously by the second push plate 37, and the first sealing plate 28 at the bottom of the first moisture absorbent cotton 24 will slide downward in a sealed manner inside the discharge hole 26, and the first sealing plate 28 at the top will slide downward in a sealed manner inside the feed hole 27. By setting the first sealing plate 28, the top and bottom ends of the first moisture absorbent cotton 24 seal the feed hole 27 and the discharge hole 26 respectively, so as to prevent the exhaust gas from overflowing along the discharge hole 26 and the feed hole 27 and affecting the dehumidification operation; the movable end of the electric push rod 36 is extended to push the first moisture absorbent cotton 24 out along the discharge hole 26, and squeeze the first moisture absorbent cotton 24. The wet cotton 24 is pressed against the dehumidifier 2, causing the first moisture-absorbing cotton 24 to shrink until the first moisture-absorbing cotton 24 is completely pushed out of the dehumidifier 2. At this time, the first sealing plate 28 above the first moisture-absorbing cotton 24 will block the port of the discharge hole 26, and then the electric push rod 36 shrinks until it moves close to the top wall of the first installation box 31. At this time, the side wall of the movable end of the electric push rod 36 releases the limit on the second moisture-absorbing cotton 34, and under the elastic action of the first spring 32, the first push plate 33 is used to push multiple second moisture-absorbing cottons 34 forward, so that the adjacent second moisture-absorbing cottons 34 move to above the feed hole 27, and then the electric push rod 36 is pressed against the dehumidifier 2, causing the second moisture-absorbing cotton 34 to move to above the feed hole 27. The movable end of the rod 36 is extended again, pushing the second moisture-absorbing cotton 34 through the feed hole 27 and into the dehumidifier 2, until the second sealing plate 35 at the bottom of the second moisture-absorbing cotton 34 enters the discharge hole 26, and the replacement is completed. Then the staff will take away the first moisture-absorbing cotton 24 pushed out along the discharge hole 26. If the second moisture-absorbing cotton 34 needs to be replaced, just repeat the above steps; the device can also replace the first moisture-absorbing cotton 24 without affecting the exhaust gas dehumidification process. Compared with the prior art, the device needs to be shut down and then disassembled and replaced. The device is more convenient and practical, and the practicality of the device is improved; The first moisture absorbent cotton 24, the second moisture absorbent cotton 34 and the third moisture absorbent cotton 46 are all made of the same material and have a certain hardness. They will not deform when they are moderately squeezed. Therefore, when the first moisture absorbent cotton 24, the second moisture absorbent cotton 34 and the third moisture absorbent cotton 46 are pushed to move, they will not deform. When the squeezing force is too large, they will deform.

[0029] In order to solve the problem that the dehumidification effect will inevitably be affected during the replacement of the first moisture-absorbing cotton 24 during the dehumidification operation, resulting in a high water vapor content in the tail gas, which affects the dehumidification effect, such as Figure 7 - Figure 8 As shown: The auxiliary component 4 includes two second installation boxes 42, which are symmetrically fixedly connected to the side walls of the dehumidifier 2. The side walls of the dehumidifier 2 are symmetrically provided with rectangular holes 41, each of which is located inside the second installation box 42, and the inner wall of each second installation box 42 is symmetrically fixedly connected with a second spring 43.

[0030] A plurality of second springs 43 are commonly fixedly connected to a connecting plate 44, an electromagnet 47 is fixedly connected to the inner wall of each second mounting box 42, a permanent magnet 48 is fixedly connected to the side wall of each connecting plate 44, a third moisture-absorbing cotton 46 is slidably connected to the interior of each second mounting box 42, and third sealing plates 45 are symmetrically fixedly connected to the side walls on both sides of the third moisture-absorbing cotton 46, one of the third sealing plates 45 is sealingly and slidably connected to the inner wall of the rectangular hole 41, and another third sealing plate 45 is fixedly connected to the adjacent third sealing plate 45.

[0031] In this scheme: since only the hygroscopic component 25 is performing the dehumidification operation during the process of replacing the first hygroscopic cotton 24, the dehumidification effect at this time will be significantly reduced, affecting the exhaust gas dehumidification; in order not to affect the dehumidification effect during the process of replacing the first hygroscopic cotton 24, before the first hygroscopic cotton 24 is replaced, the electromagnets 47 inside the second installation boxes 42 on both sides are energized, so that the electromagnets 47 generate magnetic poles of the same polarity as the adjacent surfaces of the permanent magnets 48, thereby pushing the third hygroscopic cotton 46 inside each second installation box 42 to approach each other under the action of magnetic repulsion, and at this time the second spring 43 is in a stretched state until the adjacent surfaces of the two third hygroscopic cottons 46 contact each other, forming a completed hygroscopic cotton between the first hygroscopic cotton 24 and the air inlet pipe 21, and the third hygroscopic cotton 46 is used for auxiliary dehumidification to ensure that the exhaust gas dehumidification effect will not be significantly reduced, and then the first hygroscopic cotton 24 is replaced; After the first hygroscopic cotton 24 is replaced, the electromagnet 47 is powered off, so that the magnetic repulsion between the electromagnet 47 and the permanent magnet 48 is lost, and the two third hygroscopic cottons 46 are pulled back to their original positions under the elastic action of the second spring 43. At this time, the third sealing plate 45 on one side of the third hygroscopic cotton 46 enters the adjacent rectangular hole 41 to seal the rectangular hole 41 to prevent the exhaust gas from overflowing along the rectangular hole 41 and causing an impact. The third hygroscopic cotton 46 is reset and recovered for subsequent continued use. When the third hygroscopic cotton 46 is used for a long time, it can be replaced by opening the box door on the top of the second installation box 42.

[0032] In order to solve the problem that metal corrosion occurs on the inner wall of the air inlet pipe 21 during the exhaust gas dehumidification process of the thermal power plant, the corrosion will destroy the smoothness of the metal surface inside the air inlet pipe 21, increase friction and resistance, and thus affect the dehumidification efficiency. Figure 3 - Figure 4 and Fig. 9 - Fig.14 As shown: The repair component 5 includes two mounting rings 51, each mounting ring 51 is slidably connected to the inside of the corresponding air inlet pipe 21, the interior of the mounting ring 51 is a hollow structure, the outer wall of the mounting ring 51 is provided with a groove body 52, the inner bottom wall of the groove body 52 is provided with first circular holes 55 at equal angles, a one-way discharge valve 56 is installed in each first circular hole 55, and the side wall of one side of the mounting ring 51 is provided with second circular holes 511 at equal angles, a second control valve 512 is installed in each second circular hole 511, and the inner wall of the mounting ring 51 is symmetrically fixedly connected with third springs 57, and one end of multiple third springs 57 is commonly fixedly connected with a sealing ring 58.

[0033] The sealing ring 58 is sealingly and slidingly connected to the inside of the mounting ring 51. A feeding hole 53 is opened on the inner wall of the mounting ring 51. A first control valve 54 is installed inside the feeding hole 53. The side wall on the other side of the mounting ring 51 is symmetrically fixedly connected with a fourth spring 59 and a bellows 510. Each fourth spring 59 and bellows 510 are fixedly connected to the inner wall of the adjacent air inlet pipe 21. The side wall of each bellows 510 is fixedly connected with a pressure relief pipe 513. One end of the pressure relief pipe 513 passes through and is fixedly connected to the side wall of the adjacent air inlet pipe 21.

[0034] A pressure relief valve 514 is installed inside the pressure relief pipe 513, a fixing plate 518 is fixedly connected to the side wall of the support frame 1, an airbag 521 is fixedly connected to the top of the fixing plate 518, a support spring 519 is symmetrically fixedly connected to the top of the fixing plate 518, a plurality of support springs 519 are commonly fixedly connected to a pull plate 520, a bottom end of the pull plate 520 is fixedly connected to the top of the airbag 521, and a side wall of one side of the airbag 521 is fixedly connected to a conduit 522.

[0035] A third control valve 523 is installed inside the conduit 522, and the other side wall of the airbag 521 is fixedly connected to a second connecting pipe 516, a one-way exhaust valve 517 is installed inside the second connecting pipe 516, and one end of the second connecting pipe 516 is symmetrically fixedly connected to the first connecting pipe 515. Each first connecting pipe 515 is a U-shaped structure, and the two ports of the first connecting pipe 515 pass through the adjacent side wall of the air inlet pipe 21 and are fixedly connected to the corresponding bellows 510.

[0036] In this solution, since the tail gas of the thermal power plant contains a large amount of high temperature, which is as high as several hundred degrees, a large amount of high temperature will be stored inside the air inlet pipe 21. After working for a long time, metal corrosion will appear on the inner wall of the air inlet pipe 21. The second control valve 512 and the one-way discharge valve 56 are opened, and the high temperature inside the air inlet pipe 21 enters the inside of the mounting ring 51 along the second circular hole 511. The hollow part inside the mounting ring 51 is divided into two parts by the sealing ring 58. The anti-corrosion paint is located on the left side of the sealing ring 58. This kind of anti-corrosion paint is made of high temperature resistant material and will not burn in a high temperature environment. In addition, the anti-corrosion paint can be removed by the back The first control valve 54 is opened continuously to replenish the air through the feeding hole 53; when the second control valve 512 is opened, high temperature enters the right side of the sealing ring 58, heats the air on the right side of the sealing ring 58, increases the pressure, and pushes the sealing ring 58 to move to the left. The anti-corrosion paint is discharged along the first circular hole 55 by utilizing the pressure difference, and the anti-corrosion paint fills the groove body 52, so that the inside of the groove body 52 is full of the anti-corrosion paint. The thickness of the groove body 52 is small, so that after the anti-corrosion paint enters the groove body 52, the groove body 52 can be quickly filled and contacted with the inner wall of the air inlet pipe 21, so as to repair the anti-corrosion layer; The use of the repair component 5 is during the replacement of the first moisture absorbent cotton 24, and it can be used selectively to avoid repairing the anti-corrosion layer on the inner wall of the air inlet pipe 21 every time the first moisture absorbent cotton 24 is replaced, resulting in the anti-corrosion layer being too thick. During the replacement of the first moisture absorbent cotton 24, the first moisture absorbent cotton 24 will be pushed out along the discharge hole 26 through the electric push rod 36. During this process, the pull plate 520 will be pushed downward, thereby squeezing the airbag 521. At this time, the support spring 519 is in a compressed state. If the repair component 5 is not needed, the third control valve 523 is opened, the airbag 521 is squeezed, and the internal gas thereof is discharged along the conduit 522; if the repair component 5 is needed, the third control valve 523 is closed and the one-way exhaust valve 517 is opened, so that the gas inside the airbag 521 enters the corresponding inner wall of the bellows 510 along the second connecting pipe 516 and the first connecting pipe 515, respectively, so that the bellows 510 begins to expand and stretch. At this time, the fourth spring 59 is in a stretched state, thereby pushing the adjacent mounting ring 51 to be Move, at this time, use the repair component 5, so that the anti-corrosion paint moves along the inner wall of the air inlet pipe 21, and the anti-corrosion layer on the inner wall of the air inlet pipe 21 is repaired; when the installation ring 51 moves close to the end of the air inlet pipe 21, the one-way exhaust valve 517 is closed and the pressure relief valve 514 is opened, and it contracts under the elastic action of the fourth spring 59, pulling the installation ring 51 to reset and move, so that the internal gas of each bellows 510 is discharged along the pressure relief pipe 513, thereby resetting and moving, and completing the anti-corrosion layer repair on the inner wall of the air inlet pipe 21. The third control valve 523 is opened after the staff takes away the first moisture-absorbing cotton 24, and the pull plate 520 is driven to move upward under the elastic action of the support spring 519, so that the airbag 521 expands, thereby the external gas is drawn into the airbag 521 along the conduit 522 to replenish the gas inside the airbag 521 for subsequent continued use.

[0037] The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field.

[0038] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A tail gas dehumidification device for a thermal power plant, comprising a support frame (1) and a dehumidifier (2), characterized in that: The dehumidifier (2) is fixedly mounted on the top of the support frame (1); an air inlet pipe (21) is symmetrically penetrated and fixedly connected to a side wall of one side of the dehumidifier (2); two air inlet pipes (21) are commonly fixedly connected to a flow guide pipe (22); an air outlet pipe (23) is penetrated and fixedly connected to the side wall of the other side of the dehumidifier (2); a feed hole (27) is provided at the top of the dehumidifier (2); a discharge hole (26) is provided at the bottom of the dehumidifier (2); the feed hole (27) and the discharge hole (26) are located In the same vertical plane, the inner walls of the feed hole (27) and the discharge hole (26) are both sealed and slidably connected with a first sealing plate (28), the two first sealing plates (28) are commonly fixedly connected with a first moisture-absorbing cotton (24), a moisture-absorbing component (25) is installed inside the dehumidifier (2), a replacement component (3) is installed at the top of the dehumidifier (2), auxiliary components (4) are symmetrically installed on the side walls of the dehumidifier (2), and a repair component (5) is installed inside each of the air inlet pipes (21).

2. The tail gas dehumidification device for a thermal power plant according to claim 1, characterized in that: The replacement assembly (3) comprises a first installation box (31), the first installation box (31) being fixedly connected to the top end of the dehumidifier (2), a plurality of second moisture-absorbing cottons (34) being slidably connected inside the first installation box (31), and a second sealing plate (35) being fixedly connected to the top and bottom ends of each second moisture-absorbing cotton (34).

3. The tail gas dehumidification device for a thermal power plant according to claim 2, characterized in that: Each of the second sealing plates (35) is slidably connected to the inner bottom wall of the first installation box (31); the inner side wall of the first installation box (31) is symmetrically fixedly connected to a first spring (32); a plurality of the first springs (32) are commonly fixedly connected to a first push plate (33); the first push plate (33) is in contact with the adjacent side wall of the second moisture-absorbing cotton (34).

4. The tail gas dehumidification device for a thermal power plant according to claim 3, characterized in that: The top of the first installation box (31) is symmetrically fixedly connected to an electric push rod (36), the movable end of each electric push rod (36) is slidably connected to the top of the first installation box (31), the movable ends of the two electric push rods (36) are commonly fixedly connected to a second push plate (37), and the bottom end of the second push plate (37) is in contact with the top of the adjacent first sealing plate (28).

5. The tail gas dehumidification device for a thermal power plant according to claim 1, characterized in that: The auxiliary component (4) comprises two second installation boxes (42), the two second installation boxes (42) being symmetrically fixedly connected to the side walls of the dehumidifier (2), the side walls of the dehumidifier (2) being symmetrically provided with rectangular holes (41), each of the rectangular holes (41) being located inside the second installation box (42), and the inner side walls of each second installation box (42) being symmetrically fixedly connected with a second spring (43).

6. The tail gas dehumidification device for a thermal power plant according to claim 5, characterized in that: A plurality of second springs (43) are commonly fixedly connected to a connecting plate (44); an electromagnet (47) is fixedly connected to the inner side wall of each second installation box (42); a permanent magnet (48) is fixedly connected to the side wall of each connection plate (44); a third moisture-absorbing cotton (46) is slidably connected to the interior of each second installation box (42); and third sealing plates (45) are symmetrically fixedly connected to the side walls of both sides of the third moisture-absorbing cotton (46); one of the third sealing plates (45) is sealingly and slidably connected to the inner wall of the rectangular hole (41), and the other third sealing plate (45) is fixedly connected to an adjacent third sealing plate (45).

7. The tail gas dehumidification device for a thermal power plant according to claim 1, characterized in that: The repair component (5) comprises two mounting rings (51), each of the mounting rings (51) being slidably connected to the inside of a corresponding air inlet pipe (21), the inside of the mounting ring (51) being a hollow structure, the outer wall of the mounting ring (51) being provided with a groove body (52), the inner bottom wall of the groove body (52) being provided with first circular holes (55) at equal angles, each of the first circular holes (55) being provided with a one-way discharge valve (56), the side wall of one side of the mounting ring (51) being provided with second circular holes (511) at equal angles, each of the second circular holes (511) being provided with a second control valve (512), the inner wall of the mounting ring (51) being symmetrically fixedly connected with third springs (57), and one end of a plurality of the third springs (57) being fixedly connected with a sealing ring (58) in common.

8. The tail gas dehumidification device for a thermal power plant according to claim 7, characterized in that: The sealing ring (58) is sealingly and slidably connected to the inside of the mounting ring (51); a feeding hole (53) is provided on the inner wall of the mounting ring (51); a first control valve (54) is installed inside the feeding hole (53); a fourth spring (59) and a bellows (510) are symmetrically and fixedly connected to the side wall on the other side of the mounting ring (51); each of the fourth springs (59) and the bellows (510) is fixedly connected to the inner wall of the adjacent air inlet pipe (21); each of the side walls of the bellows (510) is fixedly connected to a pressure relief pipe (513); one end of the pressure relief pipe (513) penetrates and is fixedly connected to the side wall of the adjacent air inlet pipe (21).

9. The tail gas dehumidification device for a thermal power plant according to claim 8, characterized in that: A pressure relief valve (514) is installed inside the pressure relief pipe (513); a fixing plate (518) is fixedly connected to the side wall of the support frame (1); an airbag (521) is fixedly connected to the top of the fixing plate (518); a support spring (519) is symmetrically fixedly connected to the top of the fixing plate (518); a plurality of support springs (519) are commonly fixedly connected to a pull plate (520); a bottom end of the pull plate (520) is fixedly connected to the top of the airbag (521); and a guide tube (522) is fixedly connected to one side wall of the airbag (521).

10. The tail gas dehumidification device for a thermal power plant according to claim 9, characterized in that: A third control valve (523) is installed inside the conduit (522); a second connecting pipe (516) is fixedly connected to the side wall of the other side of the air bag (521); a one-way exhaust valve (517) is installed inside the second connecting pipe (516); one end of the second connecting pipe (516) is symmetrically fixedly connected to a first connecting pipe (515); each of the first connecting pipes (515) is of a U-shaped structure; two ports of the first connecting pipe (515) penetrate the side wall of an adjacent air inlet pipe (21) and are fixedly connected to a corresponding bellows (510).

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