A flue gas desulfurization device and a flue gas treatment system

Abstract

The present invention provides a flue gas desulfurization device and a flue gas treatment system, which relate to the technical field of flue gas treatment, wherein the flue gas desulfurization device comprises a ventilation pipe, a spray component and a circulation component, the spray component comprises a spray box and a spray assembly arranged in the spray box, and a spray space connected to the ventilation pipe is arranged in the spray box; the circulation component comprises a circulation pump and a circulation pipe, and a mesh layer and a heat preservation layer are arranged on the outside of the ventilation pipe in sequence, and the circulation pipe comprises a circulation water pipe arranged in the mesh layer, and the circulation water pipe is connected to the spray assembly. By arranging the mesh layer and the heat preservation layer on the outside of the ventilation pipe, the heat transfer of the flue gas from the pipe wall is reduced; at the same time, the circulation water pipe is arranged in the mesh layer, and the mesh layer is used to increase the heat transfer area, so that the heat is transferred to the spray solution in the circulation water pipe, thereby improving the desulfurization effect.

Description

Technical Field

[0001] The present invention relates to the technical field of flue gas treatment, and in particular to a flue gas desulfurization device and a flue gas treatment system. Background Art

[0002] Desulfurization refers to the process of removing sulfur from fuel before combustion and before flue gas is discharged. It is one of the important technical measures to prevent and control air pollution. Domestic and foreign desulfurization technologies are divided into three categories according to whether water is added during the desulfurization process and the dry and wet forms of the desulfurization products: wet desulfurization, semi-dry desulfurization and dry desulfurization. At present, 80% of the processes of large domestic desulfurization units are wet desulfurization technologies, among which the most widely used is limestone-gypsum desulfurization. The main process flow is to use limestone or lime as a desulfurization absorbent. The limestone is crushed and ground into powder and mixed with water to form an absorption slurry. The absorption slurry is then contacted and mixed with the flue gas in the absorption tower. The sulfur dioxide in the flue gas reacts chemically with the calcium carbonate in the slurry and the oxidizing air blown in to be removed. The desulfurized flue gas is removed by a demister to remove the fine droplets brought out, and is heated by a heater and discharged into the chimney.

[0003] However, the flue gas itself has a lot of heat due to heating. Before entering the flue gas desulfurization device, the heat is usually transferred to the factory environment, resulting in a high factory environment temperature. Summary of the invention

[0004] Based on this, in order to solve the above problems, the present invention provides a flue gas desulfurization device and a flue gas treatment system, and its specific technical solutions are as follows:

[0005] On the one hand, a flue gas desulfurization device includes a ventilation duct, a spray component and a circulation component, the spray component includes a spray box and a spray assembly arranged in the spray box, the spray box is provided with a spray space connected to the ventilation duct; the ventilation duct is used to pass the flue gas into the spray space; the circulation component includes a circulation pump and a circulation duct, the outer side of the ventilation duct is provided with a mesh layer and a thermal insulation layer in sequence, the circulation duct includes a circulation water pipe arranged in the mesh layer, and the circulation water pipe is connected to the spray assembly; the circulation pump pumps the spray solution at the bottom of the spray box to the circulation water pipe, and the spray solution is sprayed into the spray space through the spray assembly.

[0006] The above-mentioned flue gas desulfurization device reduces the heat transfer of flue gas from the pipe wall by arranging a mesh layer and a thermal insulation layer on the outside of the ventilation pipe; at the same time, the circulating water pipe is arranged in the mesh layer, and the mesh layer is used to increase the heat transfer area, which facilitates the heat transfer to the spray solution in the circulating water pipe; in addition, the solubility of the spray solution can increase with the increase of temperature, so as to better react chemically with the sulfur component in the flue gas and improve the desulfurization effect.

[0007] Furthermore, the spray assembly includes a first spray group and a second spray group connected in sequence; the spray box includes a first spray barrel, a second spray barrel, and a connecting pipe connecting the first spray barrel and the second spray barrel; the first spray group includes a first cyclone unit arranged in the first spray barrel, and a first spray unit arranged above the first cyclone unit; the second spray group includes a second cyclone unit arranged in the second spray barrel, and a second spray unit arranged above the second cyclone unit; the spray space has an N-shaped structure as a whole, and the smoke enters from the middle of the first spray barrel, and passes through the first cyclone unit, the first spray unit, the connecting pipe, the bottom of the second spray barrel, the second cyclone unit and the second spray unit in sequence.

[0008] Furthermore, it also includes a collecting component, the bottom of the first spray barrel is provided with a first outlet, and the bottom of the second spray barrel is provided with a second outlet; the collecting component includes a first collecting trough arranged at the bottom of the first spray barrel, and a second collecting trough arranged at the bottom of the second spray barrel.

[0009] Furthermore, it also includes a spray bracket, a pushing component and a dumping component; the spray box is fixedly arranged on the spray bracket, and the first collecting trough is arranged on the spray bracket through a sliding structure, and the sliding structure includes a sliding flange arranged at the bottom of the first collecting trough, and a sliding groove arranged on the spray bracket; the dumping component includes a mounting support, a placement bracket and a driving component, and the placement bracket is provided with a rotating part and a mounting part; the pushing component is used to push the first collecting trough out of the spray bracket and onto the mounting part of the placement bracket, and the driving component drives the placement bracket to rotate at least 90° with the rotating part as the rotation center.

[0010] Furthermore, the driving assembly includes a driving motor, a driving shaft and a connecting rod unit which are transmission-connected to the output end of the driving motor; the placement bracket is provided with a connecting portion, and the connecting rod unit is provided with a driving end with a hub connected to the driving shaft, and a hinged end which is rotationally connected to the connecting portion.

[0011] Furthermore, the pushing component includes a first pushing cylinder, and the output rod end of the first pushing cylinder is connected to the first collecting tank through a connecting structure; the connecting structure includes a rotating joint arranged at the output rod end of the first pushing cylinder, a connecting head connected to the rotating joint, and a clamping seat arranged on the wall of the first collecting tank, and the connecting head is provided with a clamping shoulder end adapted to the clamping seat.

[0012] Furthermore, it also includes a moving component arranged at the bottom of the mounting support; the moving component includes a fixed seat, a moving seat, and a rodless cylinder driving the moving seat to move relative to the fixed seat; the rodless cylinder drives the moving seat to reciprocate between the first dumping station and the second dumping station, the first dumping station is located on the side of the first collecting tank, and the first dumping station is located on the side of the second collecting tank; the dumping component includes a reversing structure, and the reversing structure includes a first rotating groove, a second rotating groove, a first locking unit and a second locking unit arranged on the mounting support; the rotating part is arranged on the placement The first rotating pin and the second rotating pin are on both sides of the bottom of the bracket, the first rotating pin is adapted to the first rotating groove, and the second rotating pin is adapted to the second rotating groove; the first locking unit includes a first cylinder and a first locking seat driven by the first cylinder, the first cylinder drives the first locking seat to move, thereby switching the locking state or the releasing state of the first rotating pin; the second locking unit includes a second cylinder and a second locking seat driven by the second cylinder, the second cylinder drives the second locking seat to move, thereby switching the locking state or the releasing state of the second rotating pin.

[0013] Furthermore, the first collecting tank is a tank shell with an opening at the top, and a discharge oblique opening is provided at the top of the tank shell and a water leakage hole group is provided at the bottom.

[0014] On the other hand, a flue gas treatment system includes a secondary sedimentation device, a box-type compressor and a flue gas desulfurization device; the flue gas desulfurization device, the secondary sedimentation device and the box-type compressor are connected in sequence.

[0015] The above-mentioned flue gas treatment system performs primary precipitation on the flue gas through the flue gas desulfurization device, and the secondary precipitation device performs secondary precipitation on the primary treated flue gas discharged from the flue gas desulfurization device. The box-type compressor performs water-liquid separation and compression treatment on the precipitation mixed liquid produced by the secondary precipitation device. The desulfurization effect is good, and the precipitate can be separated, and the continuous use is good.

[0016] Furthermore, a first air outlet is provided on the top of the spray box; the secondary sedimentation device includes a sedimentation box, which is provided with a sedimentation outlet, a second air inlet, and a second air outlet from bottom to top, the second air inlet is connected to the first air outlet, and the sedimentation outlet is connected to the box-type compressor; the box-type compressor includes a pumping component and a compression component, the pumping component pumps the sediment at the bottom of the sedimentation box to the compression component through the sedimentation outlet, and the compression component is used to compress the sediment into a sedimentation block. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention can be further understood from the following description in conjunction with the accompanying drawings. The components in the figures are not necessarily drawn to scale, but the emphasis is placed on illustrating the principles of the embodiments. In different views, the same reference numerals designate corresponding parts.

[0018] Figure 1 The structure of the flue gas desulfurization device according to one embodiment of the present invention is shown in FIG. Figure 1 ;

[0019] Figure 2 is a structural cross-sectional view of a flue gas desulfurization device according to an embodiment of the present invention;

[0020] Figure 3 The structure of the flue gas desulfurization device according to one embodiment of the present invention is shown in FIG. Figure 2 ;

[0021] Figure 4 The structure of the flue gas desulfurization device according to one embodiment of the present invention is shown in FIG. Figure 3 ;

[0022] Figure 5 is a schematic structural diagram of a dumping component according to an embodiment of the present invention;

[0023] Figure 6 yes Figure 1 A magnified view of the structure at E in the middle;

[0024] Figure 7 The structure of the flue gas treatment system according to one embodiment of the present invention is shown in FIG. Figure 1 ;

[0025] Figure 8 The structure of the flue gas treatment system according to one embodiment of the present invention is shown in FIG. Figure 2 .

[0026] Description of reference numerals:

[0027] 1. Ventilation pipe; 2. Spraying parts; 3. Circulation parts; 4. Collection parts; 5. Spraying bracket; 6. Pushing parts; 7. Dumping parts; 8. Connection structure; 9. Moving parts;

[0028] 101, mesh layer; 102, thermal insulation layer;

[0029] 11. Secondary precipitation device; 12. Box compressor; 13. Flue gas desulfurization device;

[0030] 111. Sedimentation tank;

[0031] 121. Pumping component; 122. Compression component;

[0032] 21. Spray box; 22. Spray assembly; 23. First spray group; 24. Second spray group;

[0033] 211. first spray barrel; 212. second spray barrel; 213. connecting pipe;

[0034] 231. a first cyclone unit; 232. a first spray unit;

[0035] 241. second cyclone unit; 242. second spray unit;

[0036] 31. Circulation pump; 32. Circulation pipeline;

[0037] 321. Circulating water pipe;

[0038] 41. a first collecting tank; 42. a second collecting tank;

[0039] 61. The first push cylinder;

[0040] 71. Mounting support; 72. Placement bracket; 73. Driving assembly; 74. Reversing structure; 75. First rotating groove; 76. Second rotating groove; 77. First locking unit; 78. Second locking unit;

[0041] 721, rotating part; 722, mounting part; 723, connecting part;

[0042] 731, driving motor; 732, driving shaft; 733, connecting rod unit;

[0043] 81. Rotating joint; 82. Connecting head; 83. Card seat;

[0044] 91. Fixed seat; 92. Moving seat; 93. Rodless cylinder. DETAILED DESCRIPTION

[0045] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with its embodiments. It should be understood that the specific implementation methods described herein are only used to explain the present invention and do not limit the protection scope of the present invention.

[0046] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation method.

[0047] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0048] The “first” and “second” mentioned in the present invention do not represent specific quantities and orders, but are merely used to distinguish names.

[0049] On the one hand, if Figure 1 and Figure 2 As shown, a flue gas desulfurization device in one embodiment of the present invention includes a ventilation duct 1, a spray component 2 and a circulation component 3, the spray component 2 includes a spray box 21, and a spray assembly 22 arranged in the spray box 21, and a spray space connected to the ventilation duct 1 is provided in the spray box 21; the ventilation duct 1 is used to pass the flue gas into the spray space; the circulation component 3 includes a circulation pump 31 and a circulation duct 32, a mesh layer 101 and an insulation layer 102 are sequentially provided on the outside of the ventilation duct 1, the circulation duct 32 includes a circulation water pipe 321 arranged in the mesh layer 101, and the circulation water pipe 321 is connected to the spray assembly 22; the circulation pump 31 pumps the spray solution at the bottom of the spray box 21 to the circulation water pipe 321, and the spray solution is sprayed into the spray space through the spray assembly 22.

[0050] The above-mentioned flue gas desulfurization device reduces the heat transfer of flue gas from the pipe wall by arranging a mesh layer 101 and a thermal insulation layer 102 on the outer side of the ventilation duct 1; at the same time, the circulating water pipe 321 is arranged in the mesh layer 101, and the mesh layer 101 is used to increase the heat transfer area, so as to facilitate the heat transfer to the spray solution in the circulating water pipe 321; in addition, the solubility of the solute in the spray solution can increase with the increase of temperature, so as to better react chemically with the sulfur component in the flue gas and improve the desulfurization effect.

[0051] In one embodiment, the circulating water pipe 321 is disposed in a serpentine ring inside the mesh layer 101 .

[0052] In a specific embodiment, the spray solution is a calcium ion solution, which increases the solubility of the solute as the temperature increases.

[0053] In one embodiment, the spray assembly 22 includes a first spray group 23 and a second spray group 24 connected in sequence; the spray box 21 includes a first spray barrel 211, a second spray barrel 212, and a connecting pipe 213 connecting the first spray barrel 211 and the second spray barrel 212; the first spray group 23 includes a first cyclone unit 231 arranged in the first spray barrel 211, and a first spray unit 232 arranged above the first cyclone unit 231; the second spray group 24 includes a second cyclone unit 241 arranged in the second spray barrel 212, and a second spray unit 242 arranged above the second cyclone unit 241; the spray space has an N-shaped structure as a whole, and the smoke enters from the middle of the first spray barrel 211, and passes through the first cyclone unit 231, the first spray unit 232, the connecting pipe 213, the bottom of the second spray barrel 212, the second cyclone unit 241 and the second spray unit 242 in sequence. In this way, the first spray group 23 and the second spray group 24 are used to perform double spraying on the flue gas introduced into the spraying space, so that the flue gas reacts with the spraying solution for multiple times, thereby ensuring the desulfurization effect.

[0054] In one embodiment, a filtering unit is provided on the top of the second spray barrel 212, and the filtering unit is used to filter water and other impurities.

[0055] In one embodiment, a collecting component 4 is further included, a first outlet is provided at the bottom of the first spray barrel 211, and a second outlet is provided at the bottom of the second spray barrel 212; the collecting component 4 includes a first collecting tank 41 provided at the bottom of the first spray barrel 211, and a second collecting tank 42 provided at the bottom of the second spray barrel 212. In this way, the sulfur-containing precipitate generated by the reaction in the first spray barrel 211 is collected by the first collecting tank 41, and the sulfur-containing precipitate generated by the reaction in the second spray barrel 212 is collected by the second collecting tank 42, so that the sulfur-containing precipitate generated by the reaction can be quickly cleaned.

[0056] like Figure 1 and Figure 3 , Figure 4 , Figure 5As shown, in one embodiment, it also includes a spray bracket 5, a pushing component 6 and a dumping component 7; the spray box 21 is fixedly arranged on the spray bracket 5, and the first collection tank 41 is arranged on the spray bracket 5 through a sliding structure, and the sliding structure includes a sliding flange arranged at the bottom of the first collection tank 41, and a sliding groove arranged on the spray bracket 5; the dumping component 7 includes a mounting support 71, a placement bracket 72 and a driving component 73, and the placement bracket 72 is provided with a rotating part 721 and a mounting part 722; the pushing component 6 is used to push the first collection tank 41 out of the spray bracket 5 and onto the mounting part 722 of the placement bracket 72, and the driving component 73 drives the placement bracket 72 to rotate at least 90° with the rotating part 721 as the rotation center. Specifically, the second collection tank 42 is arranged on the spray bracket 5 through a sliding structure. In this way, the sliding direction of the first collecting tank 41 is limited by the sliding structure. When the pushing component 6 pushes the first collecting tank 41 out of the spray bracket 5 and onto the mounting portion 722 of the placement bracket 72, the driving component 73 drives the placement bracket 72 to rotate at least 90° with the rotating portion 721 as the rotation center, thereby dumping the sulfur-containing precipitates in the first collecting tank 41 and completing the cleaning of the sulfur-containing precipitates.

[0057] In one embodiment, the structure of the second collection tank 42 is the same as that of the first collection tank 41, and a fixing groove is provided on the mounting portion 722 of the placement bracket 72. In this way, the first collection tank 41 and the second collection tank 42 can be pushed onto the placement bracket 72 by the pushing component 6, and the first collection tank 41 or the second collection tank 42 can be temporarily fixed on the placement bracket 72 by the fixing groove and the sliding flange.

[0058] In one embodiment, the driving assembly 73 includes a driving motor 731, a driving shaft 732 and a connecting rod unit 733 which are connected to the output end of the driving motor 731; the placing bracket 72 is provided with a connecting portion 723, and the connecting rod unit 733 is provided with a driving end whose hub is connected to the driving shaft 732, and a hinged end which is rotatably connected to the connecting portion 723. Thus, the driving shaft 732 is driven to rotate by the output end of the driving motor 731, so that the driving end of the connecting rod unit 733 is rotated, thereby driving the hinged end to drive the placing bracket 72 to swing.

[0059] like Figure 1 and Figure 6As shown, in one embodiment, the pushing component 6 includes a first pushing cylinder 61, and the output rod end of the first pushing cylinder 61 is connected to the first collecting tank 41 through a connecting structure 8; the connecting structure 8 includes a rotating joint 81 arranged at the output rod end of the first pushing cylinder 61, a connecting head 82 connected to the rotating joint 81, and a clamping seat 83 arranged on the wall of the first collecting tank 41, and the connecting head 82 is provided with a clamping shoulder end adapted to the clamping seat 83. In this way, when the output rod end of the first pushing cylinder 61 pushes the first collecting trough 41 out of the spray bracket 5 and pushes it to the mounting portion 722 of the placement bracket 72, the driving component 73 drives the placement bracket 72 to rotate with the rotating portion 721 as the rotation center, the connecting head 82 disengages from the clamping seat 83, and the first collecting trough 41 can swing with the placement bracket 72; when the driving component 73 drives the placement bracket 72 to rotate with the rotating portion 721 as the rotation center, the clamping seat 83 re-clamps with the connecting head 82, and the output rod end of the first pushing cylinder 61 pushes the first collecting trough 41 back to the spray bracket 5.

[0060] In one embodiment, it also includes a moving component 9 arranged at the bottom of the mounting support 71; the moving component 9 includes a fixed seat 91, a moving seat 92, and a rodless cylinder 93 that drives the moving seat 92 to move relative to the fixed seat 91; the rodless cylinder 93 drives the moving seat 92 to and from the first dumping station and the second dumping station, the first dumping station is located on the side of the first collecting tank 41, and the first dumping station is located on the side of the second collecting tank 42; the dumping component 7 includes a reversing structure 74, and the reversing structure 74 includes a first rotating groove 75, a second rotating groove 76, a first locking unit 77 and a second rotating groove 78 arranged on the mounting support 71 Two locking units 78; the rotating part 721 is a first rotating pin and a second rotating pin arranged on both sides of the bottom of the placement bracket 72, the first rotating pin is adapted to the first rotating groove 75, and the second rotating pin is adapted to the second rotating groove 76; the first locking unit 77 includes a first cylinder and a first locking seat driven by the first cylinder, the first cylinder drives the first locking seat to move, thereby switching the locking state or the loosening state of the first rotating pin; the second locking unit 78 includes a second cylinder and a second locking seat driven by the second cylinder, the second cylinder drives the second locking seat to move, thereby switching the locking state or the loosening state of the second rotating pin. In this way, when the rodless cylinder 93 drives the moving seat 92 to the first dumping station, the first locking unit 77 switches the first rotating pin shaft to a locked state, and the second locking unit 78 switches the second rotating pin shaft to a loosened state, and the driving component 73 drives the placement bracket 72 to rotate with the first rotating pin as the rotation center, and the first collecting trough 41 performs the dumping operation; when the rodless cylinder 93 drives the moving seat 92 to the second dumping station, the first locking unit 77 switches the first rotating pin shaft to a loosened state, and the second locking unit 78 switches the second rotating pin shaft to a locked state, and the driving component 73 drives the placement bracket 72 to rotate with the second rotating pin as the rotation center, and the second collection trough 42 performs the dumping operation.

[0061] In one embodiment, the connecting portion 723 is disposed between the first rotating pin and the second rotating pin.

[0062] In one embodiment, the first collecting tank 41 is a tank shell with an opening at the top, and a discharge oblique opening is provided at the top of the tank shell and a water leakage hole group is provided at the bottom. In this way, the unreacted spray solution can be refluxed into the bottom tank on the spray bracket 5 through the water leakage hole group, and pumped to the spray unit again through the circulation pump 31; at the same time, the sulfur-containing precipitate can be poured out from the collection space in the tank shell by using the discharge oblique opening when the tank shell is tilted.

[0063] In one embodiment, a sedimentation detector is provided on the first collecting tank 41. Thus, when the sedimentation detector detects that the sulfur-containing sediment reaches a preset amount, a signal is sent to the controller, and the controller controls the moving part 9, the pushing part 6, and the dumping part 7 to complete the dumping action.

[0064] On the other hand, Figure 7 and Figure 8 As shown, a flue gas treatment system in one embodiment of the present invention includes a secondary precipitation device 11, a box compressor 12 and a flue gas desulfurization device 13; the flue gas desulfurization device 13, the secondary precipitation device 11 and the box compressor 12 are connected in sequence. In this way, the flue gas desulfurization device 13 performs primary precipitation on the flue gas, the secondary precipitation device 11 performs secondary precipitation on the primary treated flue gas discharged from the flue gas desulfurization device 13, and the box compressor 12 performs water-liquid separation and compression treatment on the precipitation mixed liquid generated by the secondary precipitation device 11, so that the desulfurization effect is good, and the precipitate can be separated, and the continuous use is good.

[0065] In one embodiment, the top of the spray box 21 is provided with a first air outlet; the secondary sedimentation device 11 includes a sedimentation box 111, and the sedimentation box 111 is provided with a sedimentation outlet, a second air inlet, and a second air outlet from bottom to top, the second air inlet is connected to the first air outlet, and the sedimentation outlet is connected to the box compressor 12; the box compressor 12 includes a pumping component 121 and a compression component 122, the pumping component 121 pumps the sediment at the bottom of the sedimentation box 111 to the compression component 122 through the sedimentation outlet, and the compression component 122 is used to compress the sediment into a sedimentation block. Specifically, the second air inlet is below the liquid surface in the sedimentation box 111. In this way, the flue gas that has undergone the initial reaction is introduced into the second air inlet through the first air outlet, and the flue gas directly reacts chemically with the reaction solution in the sedimentation tank 111 to produce sulfur-containing precipitates; the pumping component 121 pumps the sulfur-containing precipitates at the bottom of the sedimentation tank 111 to the compression component 122 through the sedimentation outlet, and the compression component 122 compresses the sulfur-containing precipitates into sedimentation blocks and sends the water therein back to the sedimentation tank 111 through the recovery pipe.

[0066] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0067] The above-mentioned embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A flue gas desulfurization device, characterized in that: It includes a ventilation pipeline, a spraying component and a circulation component, wherein the spraying component includes a spray box and a spraying assembly arranged in the spray box, and the spray box is provided with a spraying space connected to the ventilation pipeline; The ventilation duct is used to pass smoke into the spray space; The circulation component includes a circulation pump and a circulation pipeline, a mesh layer and a heat preservation layer are arranged on the outside of the ventilation pipeline in sequence, and the circulation pipeline includes a circulation water pipe arranged in the mesh layer, and the circulation water pipe is connected to the spray assembly; The circulating pump pumps the spray solution at the bottom of the spray box to the circulating water pipe, and the spray solution is sprayed into the spray space through the spray assembly; The spray assembly comprises a first spray group and a second spray group which are connected in sequence; The spray box includes a first spray barrel, a second spray barrel, and a connecting pipe connecting the first spray barrel and the second spray barrel; The first spray group includes a first cyclone unit disposed in the first spray barrel, and a first spray unit disposed above the first cyclone unit; The second spray group includes a second cyclone unit disposed in the second spray barrel, and a second spray unit disposed above the second cyclone unit; The spray space is in an N-shaped structure as a whole, and the smoke enters from the middle of the first spray barrel, passes through the first cyclone unit, the first spray unit, the connecting pipe, the bottom of the second spray barrel, the second cyclone unit and the second spray unit in sequence; It also includes a collecting component, wherein the bottom of the first spray barrel is provided with a first outlet, and the bottom of the second spray barrel is provided with a second outlet; The collecting component comprises a first collecting tank disposed at the bottom of the first spray barrel, and a second collecting tank disposed at the bottom of the second spray barrel; It also includes a spray bracket, a pusher component and a dumping component; The spray box is fixedly arranged on the spray bracket, and the first collecting tank is arranged on the spray bracket through a sliding structure, and the sliding structure includes a sliding flange arranged at the bottom of the first collecting tank and a sliding groove arranged on the spray bracket; The tipping component comprises a mounting support, a placement bracket connected to the mounting support, and a driving assembly, wherein the placement bracket is provided with a rotating portion and a mounting portion; The pushing component is used to push the first collecting tank out of the spray bracket and onto the mounting portion of the placement bracket, and the driving component drives the placement bracket to rotate at least 90° with the rotating portion as the rotation center; The driving assembly includes a driving motor, a driving shaft and a connecting rod unit which are transmission-connected to the output end of the driving motor; The placement bracket is provided with a connecting portion, and the connecting rod unit is provided with a driving end whose hub is connected to the driving shaft, and a hinged end rotatably connected to the connecting portion; The pushing component comprises a first pushing cylinder, and an output rod end of the first pushing cylinder is connected to the first collecting tank through a connecting structure; The connection structure includes a rotating joint arranged at the output rod end of the first push cylinder, a connecting head connected to the rotating joint, and a clamping seat arranged on the wall of the first collecting tank, and the connecting head is provided with a clamping shoulder end adapted to the clamping seat; Also included is a moving component disposed at the bottom of the mounting support; The moving component includes a fixed seat, a moving seat, and a rodless cylinder driving the moving seat to move relative to the fixed seat; The rodless cylinder drives the movable seat to and fro between a first dumping station and a second dumping station, wherein the first dumping station is located on the side of the first collecting tank, and the second dumping station is located on the side of the second collecting tank; The tipping component further includes a reversing structure, which includes a first rotating groove, a second rotating groove, a first locking unit and a second locking unit arranged on the mounting support; The rotating part is a first rotating pin and a second rotating pin arranged on both sides of the bottom of the placement bracket, the first rotating pin is adapted to the first rotating groove, and the second rotating pin is adapted to the second rotating groove; The first locking unit includes a first cylinder and a first locking seat driven by the first cylinder, wherein the first cylinder drives the first locking seat to move, thereby switching the locking state or the releasing state of the first rotating pin shaft; The second locking unit includes a second cylinder and a second locking seat driven by the second cylinder, and the second cylinder drives the second locking seat to move, thereby switching the locking state or the releasing state of the second rotating pin shaft; The connection portion is provided between the first rotation pin and the second rotation pin.

2. A flue gas desulfurization device according to claim 1, characterized in that: The first collecting tank is a tank shell with an opening at the top, wherein a discharge oblique opening is arranged at the top of the tank shell and a water leakage hole group is arranged at the bottom.

3. A flue gas treatment system, characterized in that: It comprises a secondary precipitation device, a box-type compressor and a flue gas desulfurization device as claimed in any one of claims 1 to 2; The flue gas desulfurization device, the secondary precipitation device and the box-type compressor are connected in sequence.

4. A flue gas treatment system according to claim 3, characterized in that: The top of the spray box is provided with a first air outlet; The secondary sedimentation device comprises a sedimentation box, which is provided with a sedimentation outlet, a second air inlet, and a second air outlet in sequence from bottom to top, the second air inlet is connected to the first air outlet, and the sedimentation outlet is connected to the box-type compressor; The box-type compressor comprises a pumping component and a compression component. The pumping component pumps the sediment at the bottom of the sedimentation box to the compression component through the sedimentation outlet. The compression component is used to compress the sediment into sedimentation blocks.

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