Waste gas recovery treatment device for LNG (Liquefied Natural Gas)

Abstract

The invention relates to the technical field of waste gas treatment equipment, and particularly discloses a waste gas recovery treatment device for LNG (Liquefied Natural Gas), which comprises a demister, the demister comprises a plurality of demisting blades, a desulfurization tower is provided with a dismounting opening, a dismounting device is arranged in the desulfurization tower, and the dismounting device comprises a mounting frame, a mounting rod, an adjusting rod, a rotating mechanism and an adjusting assembly. A sliding groove is formed in the mounting rod, the adjusting rod is movably matched with the sliding groove, the adjusting assembly drives the rotating mechanism to move, the rotating mechanism drives the adjusting rod to rotate, the adjusting rod drives the multiple demisting blades to get close to each other or get away from each other, and after the multiple demisting blades get close to each other to be adjusted, the adjusting assembly and the multiple demisting blades slide out of the disassembling opening to be disassembled. The adjusting assembly and the multiple demisting blades slide in from the dismounting opening, and the multiple demisting blades are installed after being separated from each other and adjusted; the waste gas recovery treatment device for the LNG has the effect that the use efficiency of the demister can be improved.

Description

Technical Field

[0001] The present invention relates to the technical field of waste gas treatment equipment, and particularly relates to an exhaust gas recovery and treatment device for LNG. Background Art

[0002] Liquefied natural gas, abbreviated as LNG, is a liquefied form of natural gas. Its main component is methane, which is recognized as the cleanest fossil energy on Earth. It is colorless, odorless, non-toxic and non-corrosive. Its volume is about 1 / 625 of the volume of the same amount of gaseous natural gas, and the mass of liquefied natural gas is only about 45% of the mass of the same volume of water. Its manufacturing process is to first purify the natural gas produced in the gas field, and after a series of ultra-low temperature liquefaction, it is transported by liquefied natural gas ships. The combustion of liquefied natural gas causes very little air pollution and releases a large amount of heat. Therefore, liquefied natural gas is a relatively advanced energy source. The exhaust gas recovery and treatment in the production process of liquefied natural gas usually uses a desulfurization tower. The desulfurization tower is a key device for removing sulfides in the exhaust gas. The sulfides in the exhaust gas are removed by chemical or physical methods, so as to achieve clean emission or further resource utilization.

[0003] The Chinese patent document with the publication number of CN 118846793 discloses a flue gas dust removal and desulfurization reaction device, including a desulfurization tower, a packing bed arranged in the middle of the desulfurization tower, and a spray pipe for spraying an alkaline solution above the packing bed; an exhaust port for the flue gas to flow through is opened at the top end inside the desulfurization tower, and a rotating rod capable of passing through the packing bed is rotatably connected to the top end inside the desulfurization tower. Rubber rods are arranged on the rotating rod, and a plurality of bumps capable of abutting against the rubber rods are arranged at the bottom of the packing bed; a lifting driving member is arranged at the top end inside the desulfurization tower, and a sealing plate capable of blocking the exhaust port is vertically slidably connected to the execution end of the lifting driving member; a linkage member is arranged between the lifting driving member and the rotating rod for rotating the rotating rod when the lifting driving member drives the transition plate to lift and lower.

[0004] During operation, when flue gas enters the desulfurization tower through the inlet flue pipe at the bottom of the desulfurization tower, the liquid supply pump introduces the alkaline solution inside the liquid storage tank into the desulfurization tower through the spray pipe, causing the alkaline solution to drip onto the packing bed and seep downward through the packing gaps inside it, so as to carry out flue gas dust removal and desulfurization work. During the subsequent flue gas dust removal and desulfurization process, the lifting drive member can periodically expand and contract. When the lifting drive member extends downward, it will drive the transition plate and the sealing plate to move downward together until the sealing plate blocks the exhaust port, blocking the exhaust process of the flue gas, enabling the flue gas to stay in the desulfurization tower for sufficient time, and reducing the possibility that the flue gas is directly discharged from the desulfurization tower without reacting with the alkaline solution; when the exhaust port is blocked and the lifting drive member continues to extend, the spring will be gradually compressed, and the rotating rod will rotate under the action of the linkage member. At this time, the rubber rod rotating together with the rotating rod will continuously strike the convex block, causing the packing inside the packing bed to vibrate and displace, so that the alkaline solution is evenly distributed on the outer surface of the packing along with the displacement of the packing. After the flue gas stays in the desulfurization tower for sufficient time, the lifting drive member contracts upward, driving the transition plate and the sealing plate to move upward and reset together, so that the flue gas rises from the exhaust port. After the flue gas passes through the demister arranged at the top of the desulfurization tower, the flue gas will continue to rise and be discharged from the desulfurization tower.

[0005] In the above technology, when the flue gas enters the demister, the demister blades inside the demister separate and remove the droplets carried in the flue gas. During long-term use of the demister blades, the demister blades need to be cleaned. At this time, workers need to enter the desulfurization tower to disassemble the demister for cleaning and then install it after cleaning. The installation and disassembly of the demister are not convenient, resulting in low use efficiency of the demister. Summary of the Invention

[0006] The present invention provides an exhaust gas recovery and treatment device for LNG, aiming to solve the technical problem in the prior art that when the flue gas enters the demister, the demister blades inside the demister separate and remove the droplets carried in the flue gas. During long-term use of the demister blades, the demister blades need to be cleaned. At this time, workers need to enter the desulfurization tower to disassemble the demister for cleaning and then install it after cleaning. The installation and disassembly of the demister are not convenient, resulting in low use efficiency of the demister.

[0007] An exhaust gas recovery and treatment device for LNG of the present invention includes a demister disposed in a desulfurization tower. The demister includes a plurality of demisting blades. A disassembly opening for the demister to slide out is formed on the desulfurization tower. A sealing door is provided at the disassembly opening. A disassembly device is arranged in the desulfurization tower. The disassembly device includes a mounting frame arranged in the desulfurization tower, a mounting rod connected to the demisting blades, an adjusting rod for driving the plurality of demisting blades to approach or move away from each other, a rotating mechanism for driving the adjusting rod to rotate, and an adjusting component for driving the rotating mechanism to slide into or out of the disassembly opening. A sliding groove is formed on the mounting rod, and the adjusting rod is movably fitted in the sliding groove. The adjusting component drives the rotating mechanism to move, the rotating mechanism drives the adjusting rod to rotate, and the adjusting rod drives the plurality of demisting blades to approach or move away from each other. After the plurality of demisting blades are adjusted to approach each other, the adjusting component and the plurality of demisting blades are slid out from the disassembly opening for disassembly. The adjusting component and the plurality of demisting blades are slid into the disassembly opening, and after the plurality of demisting blades are adjusted to move away from each other, installation is carried out.

[0008] Beneficial effects: Through the arrangement of the disassembly opening and the disassembly device, the adjusting component drives the rotating mechanism to move, the rotating mechanism drives the adjusting rod to rotate, and the adjusting rod drives the plurality of demisting blades to slide in the direction of approaching each other, so as to gather the plurality of demisting blades. Subsequently, the plurality of demisting blades are taken out from the disassembly opening, and the disassembly of the demister can be realized. After the demister is taken out, the demisting blades are cleaned, and then the demisting blades are slid into the desulfurization tower from the disassembly opening. The adjusting component drives the rotating mechanism to move, the rotating mechanism drives the adjusting rod to rotate, and the adjusting rod drives the plurality of demisting blades to slide in the direction of moving away from each other, and the plurality of demisting blades are arranged in an extended manner to complete the installation of the demister, making the installation and disassembly of the demister relatively convenient and capable of improving the use efficiency of the demister.

[0009] Preferably, the adjusting component includes an adjusting frame slidably fitted on the mounting frame and a support plate arranged on the adjusting frame. An installation plate is arranged on the adjusting frame, and one end of the adjusting rod is rotatably fitted on the installation plate.

[0010] Preferably, the rotating mechanism includes a rotating component for driving the adjusting rod to rotate and a driving component for driving the rotating component to move.

[0011] Beneficial effects: The driving component drives the rotating component to move, and the rotating component drives the adjusting rod to rotate, thereby realizing the rotational adjustment of the adjusting rod.

[0012] Preferably, the rotating component includes a rotating frame slidably fitted on the adjusting rod and used for driving the adjusting rod to rotate, and a sliding rod for driving the rotating frame to move. One end of the sliding rod is rotatably fitted with the rotating frame.

[0013] Preferably, the driving assembly includes a slider slidably fitted on the adjusting frame and a driving rod slidably fitted on the support plate, and the driving rod is connected to the slider.

[0014] Preferably, a rotating column is movably fitted on the adjusting rod, the rotating column is movably fitted in the chute, and an elastic member for pushing two adjacent rotating columns away from each other is arranged between two adjacent rotating columns.

[0015] Beneficial effects: Through the arrangement of the rotating column and the elastic member, the elastic force of the elastic member can support the two rotating columns, so that the distance between two adjacent demisting blades remains the same.

[0016] Preferably, a filter plate is arranged above the demister in the desulfurization tower.

[0017] Beneficial effects: Through the arrangement of the filter plate, the sundries in the flue gas can be filtered. At the same time, when the demister fails after long-term use, it can reduce the discharge of liquid droplets carrying sundries in the flue gas from the desulfurization tower, causing environmental pollution.

[0018] Preferably, a cleaning device is arranged on the desulfurization tower. The cleaning device includes two cleaning plates for scraping the sundries at the bottom of the filter plate, a collection box arranged on the adjusting frame, a moving assembly for driving the cleaning plates to rotate, and a collection assembly for collecting the sundries scraped by the cleaning plates. The cleaning plates are abutted against the lower surface of the filter plate.

[0019] Beneficial effects: Through the arrangement of the cleaning device, the moving assembly drives the cleaning plates to rotate. During the rotation of the cleaning plates, the sundries at the bottom of the filter plate can be scraped off, and the scraped sundries are collected into the collection box through the collection assembly, so as to clean the filter plate in time, reduce the blockage of the filter plate by sundries, and prevent the phenomenon that the filter plate cannot be used normally.

[0020] Preferably, the moving assembly includes a toothed ring for driving the cleaning plate to rotate, a gear for driving the toothed ring to rotate, and a driving rod connected to the gear. The two toothed rings are respectively connected to the two cleaning plates. The gear meshes with the two toothed rings and is used for driving the two toothed rings to rotate in opposite directions.

[0021] Preferably, the collection assembly includes a collection plate slidably fitted at the bottom of the cleaning plate and used for receiving the scraped sundries, a fixed sleeve installed on the cleaning plate, a sliding sleeve arranged on the collection plate and sleeved on the fixed sleeve, and an elastic member for supporting the sliding sleeve. One end of the elastic part is connected to the fixed sleeve, and the other end is connected to the sliding sleeve.

[0022] Beneficial effects: When the two cleaning plates rotate towards each other and the two collecting plates are in contact, the two collecting plates can squeeze each other, thereby driving the sliding sleeve to slide towards the fixed sleeve and compressing the elastic part. During the process of the collecting plate sliding towards the cleaning plate, the cleaning plate can push the sundries on the collecting plate, so that the sundries can fall into the collecting frame, completing the convenient collection of sundries.

[0023] The beneficial effects of the present invention are as follows: 1. In the present invention, through the setting of the disassembly port and the disassembly device, the rotation mechanism is driven by the adjustment component, the rotation mechanism drives the adjusting rod to rotate, and the adjusting rod drives a plurality of demisting blades to slide towards each other, so as to gather the plurality of demisting blades. Subsequently, the plurality of demisting blades are taken out from the disassembly port, and the demister can be disassembled. After the demister is taken out, the demisting blades are cleaned, and then the demisting blades are slid into the desulfurization tower from the disassembly port. The rotation mechanism is driven by the adjustment component, the rotation mechanism drives the adjusting rod to rotate, and the adjusting rod drives a plurality of demisting blades to slide away from each other, arranging the plurality of demisting blades in an expanded manner, completing the installation of the demister, making the installation and disassembly of the demister more convenient, and improving the use efficiency of the demister.

[0024] 2. In the present invention, through the setting of the filter plate, the sundries in the flue gas can be filtered. At the same time, when the demister fails after long-term use, it can reduce the discharge of liquid droplets carrying sundries in the flue gas from the desulfurization tower, causing environmental pollution.

[0025] 3. In the present invention, through the setting of the cleaning device, the movable component drives the cleaning plate to rotate. During the rotation of the cleaning plate, the sundries at the bottom of the filter plate can be scraped off, and the scraped sundries are collected into the collecting frame through the collecting component, thereby cleaning the filter plate in time, reducing the blockage of the filter plate by sundries, and preventing the filter plate from being unable to be used normally.

[0026] 4. In the present invention, when the two cleaning plates rotate towards each other and the two collecting plates are in contact, the two collecting plates can squeeze each other, thereby driving the sliding sleeve to slide towards the fixed sleeve and compressing the elastic member. During the process of the collecting plate sliding towards the cleaning plate, the cleaning plate can push the sundries on the collecting plate, so that the sundries can fall into the collecting frame, completing the convenient collection of sundries. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 is the overall structural schematic diagram of the present invention.

[0028] Figure 2 is the structural schematic diagram showing the connection relationship between the sealing door and the desulfurization tower of the present invention.

[0029] Figure 3It is a partial cross-sectional view showing the connection relationship between the disassembly device and the desulfurization tower according to the present invention.

[0030] Figure 4 It is a schematic structural view showing the connection relationship between the adjusting rod and the rotating column according to the present invention.

[0031] Figure 5 It is Figure 4 The partial enlarged view at position A in

[0032] Figure 6 It is a schematic structural view showing the connection relationship between the gear ring and the cleaning plate according to the present invention.

[0033] Figure 7 It is Figure 6 The partial enlarged view at position B in

[0034] Figure 8 It is a schematic structural view showing the connection relationship between the collection plate and the cleaning plate according to the present invention.

[0035] Reference numerals: 1. Desulfurization tower; 11. Disassembly opening; 2. Demister; 21. Demisting blades; 3. Sealing door; 4. Disassembly device; 41. Mounting frame; 42. Mounting rod; 421. Chute; 422. Limiting groove; 423. Limiting rod; 43. Adjusting rod; 44. Adjusting assembly; 441. Adjusting frame; 442. Support plate; 45. Rotating assembly; 451. Rotating frame; 452. Sliding rod; 46. Driving assembly; 461. Slide block; 462. Driving rod; 5. Mounting plate; 6. Rotating column; 7. Elastic member; 8. Filter plate; 9. Cleaning device; 91. Cleaning plate; 92. Collection box; 93. Moving assembly; 931. Gear ring; 932. Gear; 933. Rotating rod; 94. Collection assembly; 941. Collection plate; 942. Fixed sleeve; 943. Sliding sleeve; 944. Elastic part. Detailed description of the specific implementation

[0036] The following will describe in detail the embodiments of the present invention, and the examples of the embodiments are shown in the drawings. The embodiments described below by referring to the drawings are exemplary and are intended to explain the present invention, and should not be construed as limiting the present invention.

[0037] Refer to Figures 1-8, An exhaust gas recovery and treatment device for LNG according to the present invention includes a demister 2 and a disassembly device 4 disposed in a desulfurization tower 1. An air inlet pipe for flue gas is provided at the bottom of the desulfurization tower 1, and an exhaust pipe for flue gas is provided at the top of the desulfurization tower 1. A disassembly opening 11 for the demister 2 to slide out is formed on the desulfurization tower 1, and a sealing door 3 is provided at the disassembly opening 11. The sealing door 3 is hinged to the desulfurization tower 1 through a hinge. The demister 2 includes a plurality of demisting blades 21, and the plurality of demisting blades 21 are arranged at intervals along the radial direction of the desulfurization tower 1. The disassembly device 4 is used for disassembling and installing the demister 2. When the desulfurization tower 1 is working, the flue gas enters the desulfurization tower 1 from the air inlet pipe, the flue gas rises in the desulfurization tower 1, and the liquid droplets in the flue gas are intercepted by the plurality of demisting blades 21 of the demister 2. Then the flue gas continues to rise in the desulfurization tower 1 and is discharged from the exhaust pipe. When the plurality of demisting blades 21 of the demister 2 need to be cleaned after long-term use, the sealing door 3 is opened, and then the plurality of demisting blades 21 are slid out from the disassembly opening 11 through the disassembly device 4, disassembled, and cleaned. Subsequently, the plurality of demisting blades 21 are slid into the desulfurization tower 1 from the disassembly opening 11 through the disassembly device 4, and the plurality of demisting blades 21 are installed to complete the disassembly and installation operations of the plurality of demisting blades 21.

[0038] Refer to Figures 3-5 , Figure 8 , The disassembly device 4 includes a mounting frame 41 fixedly arranged in the desulfurization tower 1, a mounting rod 42 connected to the demisting blade 21, an adjusting rod 43 for driving the plurality of demisting blades 21 to approach or separate from each other, a rotating mechanism for driving the adjusting rod 43 to rotate, and an adjusting component 44 for driving the rotating mechanism to slide into or out of the disassembly opening 11. The mounting frame 41 is in a "concave" shape structure. The mounting rod 42 is fixedly connected to the top end of the demisting blade 21. A sliding groove 421 is formed on the mounting rod 42, and the sliding groove 421 is arranged along the length direction of the mounting rod 42. The adjusting rod 43 is movably fitted in the sliding groove 421. A limiting groove 422 is formed on the mounting rod 42, and the limiting groove 422 is arranged along the width direction of the mounting rod 42. Limiting rods 423 are fixedly arranged on the mounting rod 42 near the middle position and on the mounting rod 42 close to this mounting rod 42. When the plurality of mounting rods 42 drive the demisting blades 21 to approach or separate from each other, the limiting rods 423 slide and adjust in the limiting groove 422; the adjusting component 44 drives the rotating mechanism to move, the rotating mechanism drives the adjusting rod 43 to rotate, the adjusting rod 43 drives the plurality of demisting blades 21 to approach or separate from each other. After the plurality of demisting blades 21 are adjusted to approach each other, the adjusting component 44 and the plurality of demisting blades 21 are slid out from the disassembly opening 11 for disassembly, and the adjusting component 44 and the plurality of demisting blades 21 are slid into the disassembly opening 11. After the plurality of demisting blades 21 are adjusted to separate from each other, they are installed.

[0039] Refer to Figures 3-5 , Figure 8, the adjusting assembly 44 includes an adjusting frame 441 slidably fitted on the mounting frame 41 and a support plate 442 fixedly arranged on the adjusting frame 441. The adjusting frame 441 has a "convex" shape. An installation plate 5 is fixedly arranged on the adjusting frame 441. One end of the adjusting rod 43 is rotatably fitted on the installation plate 5, and the installation rod 42 at the middle position is fixedly connected to the installation plate 5.

[0040] Referring to Figures 3-5 , Figure 8 , the rotating mechanism includes a rotating assembly 45 for driving the adjusting rod 43 to rotate and a driving assembly 46 for driving the rotating assembly 45 to move. The driving assembly 46 includes a slider 461 slidably fitted on the adjusting frame 441 along the length direction of the adjusting frame 441 and a driving rod 462 slidably fitted on the support plate 442. The driving rod 462 is fixedly connected to the slider 461; the rotating assembly 45 includes a rotating frame 451 slidably fitted on the adjusting rod 43 and used for driving the adjusting rod 43 to rotate and a sliding rod 452 for driving the rotating frame 451 to move. The rotating frame 451 has a "concave" shape. One end of the sliding rod 452 is fixedly connected to the slider 461, and the other end is rotatably fitted with the rotating frame 451. When the driving rod 462 is pulled to slide outside the support plate 442, the driving rod 462 drives the slider 461 to slide. When the slider 461 slides, it drives the sliding rod 452 to slide. When the sliding rod 452 slides, it drives the rotating frame 451 to slide. When the rotating frame 451 slides, it drives the two adjusting rods 43 to rotate towards each other; when the driving rod 462 is pushed to slide inside the support plate 442, the driving rod 462 drives the slider 461 to slide. When the slider 461 slides, it drives the sliding rod 452 to slide. When the sliding rod 452 slides, it drives the rotating frame 451 to slide. When the rotating frame 451 slides, it drives the two adjusting rods 43 to rotate away from each other.

[0041] Referring to Figures 3-5 , Figure 8A rotating column 6 is movably fitted on the adjusting rod 43, and the rotating column 6 is movably fitted in the sliding groove 421. An elastic member 7 for pushing the two adjacent rotating columns 6 away from each other is provided between the two adjacent rotating columns 6. The elastic member 7 directly adopts a spring, and the two ends of the elastic member 7 are respectively connected to the two adjacent rotating columns 6. When the two adjusting rods 43 rotate in the direction of approaching each other, the multiple mounting rods 42 on both sides of the mounting rod 42 at the middle position slide at the same time, and slide in the direction close to the mounting rod 42 at the middle position, and the multiple mounting rods 42 respectively drive the multiple defogger blades 21 to slide in the direction of approaching each other. During the sliding process of the multiple defogger blades 21, the limiting rod 423 slides and adjusts in the limiting groove 422, and at the same time drives the rotating column 6 to slide and compresses the elastic member 7 to achieve the gathering adjustment operation of the multiple defogger blades 21; when the two adjusting rods 43 rotate in the direction of moving away from each other, the multiple mounting rods 42 on both sides of the mounting rod 42 at the middle position slide at the same time, and slide in the direction away from the mounting rod 42 at the middle position, and the multiple mounting rods 42 respectively drive the multiple defogger blades 21 to slide in the direction away from each other. During the sliding process of the multiple defogger blades 21, the limiting rod 423 slides and adjusts in the limiting groove 422, and at the same time drives the rotating column 6 to slide, and the elastic member 7 is reset to achieve the expansion adjustment operation of the multiple defogger blades 21.

[0042] Reference Figure 3 , Figures 6-8 The desulfurization tower 1 is located above the demister 2 and is fixedly provided with a filter plate 8, which is used to filter the debris in the flue gas passing through the filter plate 8. A cleaning device 9 is provided on the desulfurization tower 1, which is used to collect the debris intercepted at the bottom of the filter plate 8. The cleaning device 9 includes two cleaning plates 91 for scraping the debris at the bottom of the filter plate 8, a collecting frame 92 fixedly provided on the adjusting frame 441, a movable component 93 for driving the cleaning plate 91 to rotate, and a collecting component 94 for collecting the debris scraped by the cleaning plate 91. The end of the cleaning plate 91 away from the inner wall of the desulfurization tower 1 is set as a triangular structure, the cleaning plate 91 is in contact with the lower surface of the filter plate 8, the collecting frame 92 is a "concave" shaped structure, and the end of the collecting frame 92 close to the inner wall of the desulfurization tower 1 is set as an open end.

[0043] Reference Figure 3 , Figure 6 and Figure 7, the movable component 93 includes a gear ring 931 for driving the cleaning plate 91 to rotate, a gear 932 for driving the gear ring 931 to rotate, and a rotating rod 933 fixedly connected to the gear 932. The two gear rings 931 are arranged at intervals along the vertical direction. The two gear rings 931 are respectively fixedly connected to the two cleaning plates 91, and the gear ring 931 is rotationally matched with the desulfurization tower 1. The gear 932 is arranged vertically and is located between the two gear rings 931. The gear 932 meshes with both gear rings 931 and is used to drive the two gear rings 931 to rotate in opposite directions. The rotating rod 933 is rotationally matched with the desulfurization tower 1, and a motor (not shown in the figure) for driving the rotating rod 933 to rotate can be fixedly installed on the desulfurization tower 1; starting the motor can drive the rotating rod 933 to rotate, the rotating rod 933 drives the gear 932 to rotate, the gear 932 drives the two gear rings 931 to rotate in opposite directions, and the two gear rings 931 respectively drive the two cleaning plates 91 to rotate in opposite directions. During the rotation of the cleaning plate 91, the sundries on the lower surface of the filter plate 8 are scraped off.

[0044] Refer to Figure 3 , Figures 6-8The collecting assembly 94 includes a collecting plate 941 that is slidably matched with the bottom of the cleaning plate 91 and is used to receive the scraped debris, a fixed sleeve 942 fixedly installed on the cleaning plate 91, a sliding sleeve 943 fixedly arranged on the collecting plate 941 and sleeved on the fixed sleeve 942, and an elastic part 944 for supporting the sliding sleeve 943. A sliding groove is provided at the bottom of the cleaning plate 91, and the collecting plate 941 is slidably matched with the sliding groove. An extrusion slope is provided at one end of the collecting plate 941 away from the inner wall of the desulfurization tower 1, and the extrusion slope is located between the two collecting plates 94. 1, the elastic part 944 is located between the fixed sleeve 942 and the sliding sleeve 943. The elastic part 944 directly adopts a spring. One end of the elastic part 944 is fixedly connected to the fixed sleeve 942, and the other end is fixedly connected to the sliding sleeve 943. In the initial state, the elastic part 944 pushes the sliding sleeve 943 away from the fixed sleeve 942, and the collecting plate 941 is partially located outside the sliding groove of the cleaning plate 91; when the two cleaning plates 91 rotate in opposite directions to scrape off the debris on the lower surface of the filter plate 8, the debris will fall onto the collecting plate 941, and the two cleaning plates 91 will rotate in opposite directions to scrape off the debris on the lower surface of the filter plate 8. During the rotation of the cleaning plates 91, the debris gradually falls onto the collecting plate 941, and the collecting plate 941 rotates synchronously with the cleaning plate 91. When the two collecting plates 941 approach each other and the two extrusion slopes abut against each other, the two collecting plates 941 are squeezed against each other. At this time, the two collecting plates 941 are located above the collecting frame 92, and the two collecting plates 941 slide in a direction away from each other. The collecting plate 941 drives the sliding sleeve 943 to slide into the fixed sleeve 942 and compresses the elastic part 944. During the sliding process of the collecting plate 941, the side of the cleaning plate 91 The debris on the upper surface of the collecting plate 941 is squeezed so that the debris falls from the collecting plate 941 and enters the collecting frame 92. After the debris is cleaned, it is collected. When there are a lot of debris on the collecting frame 92, it can be removed from the desulfurization tower 1 and cleaned. After the debris is collected, the motor is started to drive the rotating rod 933 to rotate in the opposite direction, thereby driving the gear 932, the ring gear 931, the cleaning plate 91, and the collecting plate 941 to rotate and reset. During the rotation of the collecting plate 941, the elastic part 944 releases the elastic restoring force to drive the sliding sleeve 943 to reset.

[0045] The implementation principle of the waste gas recovery and treatment device for LNG of the present invention is as follows: when the desulfurization tower 1 is working, the flue gas enters the desulfurization tower 1 from the air inlet pipe, the flue gas rises in the desulfurization tower 1, and the liquid droplets in the flue gas are intercepted by the multiple demisting blades 21 of the demister 2, and then the flue gas continues to rise in the desulfurization tower 1 and is discharged from the exhaust pipe; When the multiple demisting vanes 21 of the demister 2 need to be cleaned after long-term use, open the sealing door 3, and disassemble the multiple demisting vanes 21 from the disassembly opening 11. During disassembly, when pulling the driving rod 462 to slide outward of the support plate 442, the driving rod 462 drives the slider 461 to slide. When the slider 461 slides, it drives the sliding rod 452 to slide. When the sliding rod 452 slides, it drives the rotating frame 451 to slide. When the rotating frame 451 slides, it drives the two adjusting rods 43 to rotate in the direction of approaching each other. The multiple mounting rods 42 on both sides of the mounting rod 42 at the middle position slide simultaneously and slide in the direction of approaching the mounting rod 42 at the middle position. The multiple mounting rods 42 respectively drive the multiple demisting vanes 21 to slide in the direction of approaching each other. During the sliding process of the multiple demisting vanes 21, the limiting rod 423 slides and adjusts in the limiting groove 422, drives the rotating column 6 to slide at the same time, and compresses the elastic member 7, realizing the gathering adjustment operation of the multiple demisting vanes 21. Then take out the adjusting frame 441, the collection box 92 and the multiple demisting vanes 21 from the disassembly opening 11, and the disassembly of the multiple demisting vanes 21 can be completed, and the multiple demisting vanes 21 can be cleaned; When the multiple demisting vanes 21 need to be installed, first slide the adjusting frame 441, the collection box 92 and the multiple demisting vanes 21 into the desulfurization tower 1 from the disassembly opening 11. Then, when pushing the driving rod 462 to slide inward of the support plate 442, the driving rod 462 drives the slider 461 to slide. When the slider 461 slides, it drives the sliding rod 452 to slide. When the sliding rod 452 slides, it drives the rotating frame 451 to slide. When the rotating frame 451 slides, it drives the two adjusting rods 43 to rotate in the direction of moving away from each other. The multiple mounting rods 42 on both sides of the mounting rod 42 at the middle position slide simultaneously and slide away from the mounting rod 42 at the middle position. The multiple mounting rods 42 respectively drive the multiple demisting vanes 21 to slide in the direction of moving away from each other. During the sliding process of the multiple demisting vanes 21, the limiting rod 423 slides and adjusts in the limiting groove 422, drives the rotating column 6 to slide at the same time, and the elastic member 7 resets, realizing the expansion adjustment of the multiple demisting vanes 21, and the installation of the multiple demisting vanes 21 can be completed; When it is necessary to clean the sundries on the lower surface of the filter plate 8 during the use of the filter plate 8, the motor is started, which can drive the rotating rod 933 to rotate. The rotating rod 933 drives the gear 932 to rotate, and the gear 932 drives the two toothed rings 931 to rotate in opposite directions. The two toothed rings 931 respectively drive the two cleaning plates 91 to rotate in opposite directions to scrape the sundries on the lower surface of the filter plate 8. The sundries will fall onto the collecting plate 941. During the rotation of the two cleaning plates 91, the sundries gradually fall onto the collecting plate 941. At the same time, the collecting plate 941 rotates synchronously with the cleaning plate 91. When the two collecting plates 941 approach each other and the two extrusion inclined surfaces are in contact with each other, the two collecting plates 941 squeeze each other. At this time, the two collecting plates 941 are located above the collecting frame 92, and the two collecting plates 941 slide in the direction away from each other. The collecting plate 941 drives the sliding sleeve 943 to slide into the fixed sleeve 942 and compresses the elastic part 944. During the sliding of the collecting plate 941, the side surface of the cleaning plate 91 squeezes the sundries on the upper surface of the collecting plate 941, so that the sundries fall off the collecting plate 941 and enter the collecting frame 92, completing the cleaning and collection of the sundries. When there are more sundries on the collecting frame 92, it can be disassembled from the desulfurization tower 1 and then cleaned.

[0046] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present invention.

Claims

1. An exhaust gas recovery and treatment device for LNG, comprising a demister (2) arranged in a desulfurization tower (1), the demister (2) including a plurality of demister vanes (21), characterized in that, The desulfurization tower (1) is provided with a disassembly opening (11) for the demister (2) to slide out. A sealing door (3) is arranged at the disassembly opening (11). A disassembly device (4) is arranged inside the desulfurization tower (1). The disassembly device (4) includes a mounting frame (41) arranged inside the desulfurization tower (1), a mounting rod (42) connected to the demisting blades (21), an adjusting rod (43) for driving a plurality of demisting blades (21) to approach or move away from each other, a rotating mechanism for driving the adjusting rod (43) to rotate, and an adjusting component (44) for driving the rotating mechanism to slide into or out of the disassembly opening (11). A chute (421) is formed on the mounting rod (42). The adjusting rod (43) is movably fitted in the chute (421). The adjusting component (44) drives the rotating mechanism to move. The rotating mechanism drives the adjusting rod (43) to rotate. The adjusting rod (43) drives a plurality of demisting blades (21) to approach or move away from each other. After a plurality of demisting blades (21) are adjusted to approach each other, the adjusting component (44) and a plurality of demisting blades (21) are slid out of the disassembly opening (11) for disassembly. The adjusting component (44) and a plurality of demisting blades (21) are slid into the disassembly opening (11). After a plurality of demisting blades (21) are adjusted to move away from each other, they are installed.

2. The waste gas recovery and treatment device for LNG according to claim 1, characterized in that, The adjusting component (44) includes an adjusting frame (441) slidably fitted on the mounting frame (41) and a support plate (442) arranged on the adjusting frame (441). An installation plate (5) is arranged on the adjusting frame (441). One end of the adjusting rod (43) is rotatably fitted on the installation plate (5).

3. The waste gas recovery and treatment device for LNG according to claim 2, wherein, The rotating mechanism includes a rotating component (45) for driving the adjusting rod (43) to rotate and a driving component (46) for driving the rotating component (45) to move.

4. The waste gas recovery and treatment device for LNG according to claim 3, characterized in that, The rotating component (45) includes a rotating frame (451) slidably fitted on the adjusting rod (43) and used for driving the adjusting rod (43) to rotate, and a sliding rod (452) for driving the rotating frame (451) to move. One end of the sliding rod (452) is rotatably fitted with the rotating frame (451).

5. The waste gas recovery and treatment device for LNG according to claim 4, wherein The driving component (46) includes a slider (461) slidably fitted on the adjusting frame (441) and a driving rod (462) slidably fitted on the support plate (442). The driving rod (462) is connected to the slider (461).

6. The waste gas recovery and treatment device for LNG according to claim 1, characterized in that, A rotating column (6) is movably fitted on the adjusting rod (43). The rotating column (6) is movably fitted in the chute (421). An elastic member (7) for pushing adjacent two rotating columns (6) to move away from each other is arranged between adjacent two rotating columns (6).

7. The waste gas recovery and treatment device for LNG according to claim 2, characterized in that, A filter plate (8) is arranged above the demister (2) in the desulfurization tower (1).

8. An exhaust gas recovery and treatment device for LNG according to claim 7, characterized in that, The desulfurization tower (1) is provided with a cleaning device (9), the cleaning device (9) comprising two cleaning plates (91) for scraping off debris at the bottom of the filter plate (8), a collecting frame (92) provided on the adjustment frame (441), a movable component (93) for driving the cleaning plates (91) to rotate, and a collecting component (94) for collecting the debris scraped off by the cleaning plates (91), the cleaning plates (91) being in contact with the lower surface of the filter plate (8).

9. The waste gas recovery and treatment device for LNG according to claim 8, wherein, The movable assembly (93) comprises a gear ring (931) for driving the cleaning plate (91) to rotate, a gear (932) for driving the gear ring (931) to rotate, and a rotating rod (933) connected to the gear (932); the two gear rings (931) are respectively connected to the two cleaning plates (91); the gear (932) meshes with the two gear rings (931) and is used to drive the two gear rings (931) to rotate in opposite directions.

10. A waste gas recovery and treatment device for LNG according to claim 8, characterized in that, The collecting assembly (94) comprises a collecting plate (941) which is slidably fitted on the bottom of the cleaning plate (91) and is used to receive scraped debris, a fixed sleeve (942) mounted on the cleaning plate (91), a sliding sleeve (943) arranged on the collecting plate (941) and sleeved on the fixed sleeve (942), and an elastic part (944) used to support the sliding sleeve (943), wherein one end of the elastic part (944) is connected to the fixed sleeve (942), and the other end is connected to the sliding sleeve (943).

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