Flue gas treatment system

Abstract

The invention provides a flue gas treatment system, which relates to the technical field of flue gas treatment, and comprises a flue gas absorption device and a flue gas treatment tower, the flue gas absorption device comprises a ventilation pipeline and a spraying component, and the spraying component comprises a spraying box and a spraying assembly; the flue gas treatment tower comprises a tower body and a spraying component; a packing layer, a spraying layer and a demisting layer are sequentially arranged above the gas inlet in the tower body; and the spraying part comprises at least three groups of spraying assemblies arranged on the spraying layer. Through the combination of the flue gas absorption device and the flue gas treatment tower, the flue gas is pretreated through the front spraying space, the load of the spraying layer of the tower body is reduced, and graded removal and resource recycling of pollutants can be realized through a multi-stage absorption process, so that the environmental protection requirement of flue gas emission is met; meanwhile, by arranging at least three groups of spraying assemblies which are arranged at the deviation angle, a staggered covering atomization area is formed, spraying dead angles are eliminated, the purification efficiency is improved, and the reaction efficiency is remarkably improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of flue gas treatment, in particular to a flue gas treatment system. BACKGROUND

[0002] With the increasingly stringent environmental protection requirements, the industrial flue gas treatment system needs to have higher treatment efficiency. The traditional flue gas purification device usually adopts a single layer or multiple layers of linearly arranged spray components to realize purification through the contact between the spray liquid and the flue gas.

[0003] The Chinese invention utility model patent with the publication number CN202876577U discloses a flue gas purification tower, which is provided with a combined structure of dust removal grid packing and defoaming unit in the tower body. The dust removal grid packing is composed of rows of inclined strip plates. The adjacent rows of strip plates are opposite in the direction of inclination and are staggered, forming a three-dimensional grid channel. The dust removal efficiency is improved by strengthening the collision between the dust and the packing and prolonging the contact time between the flue gas and the cooling and dust removal liquid. Although the arrangement mode of the strip plates of the dust removal grid packing can enhance the collision, it may cause the increase of the air flow resistance, and the packing layer needs to be disassembled during cleaning and maintenance.

[0004] In the aluminum processing (such as smelting and anodic oxidation) and aluminum spraying industry, the waste gas composition is complex, often containing fluorides (HF), particulate matter (alumina dust), VOCs (benzene series, esters), acid gases (HCl, H2SO4 fog) and heavy metals (such as lead and chromium in the paint). The layout of the spray layer in the above flue gas purification tower is mostly in parallel or symmetrical arrangement, which causes the existence of repetition or gap in the spray coverage area, and it is difficult to form uniform atomization coverage; blind areas may be generated between adjacent components, and part of the flue gas may not be fully contacted with the spray liquid before entering the subsequent processing link, affecting the purification effect; at the same time, the purification solution sprayed only by the spray unit is difficult to purify multiple pollutants, and the emission requirements cannot be met. SUMMARY

[0005] Therefore, in order to solve the problems of uneven spray coverage and high maintenance cost in the prior art, the present application provides a flue gas purification device and a flue gas treatment system, and the specific technical scheme is as follows:

[0006] A flue gas purification system comprises a flue gas absorption device and a flue gas treatment tower; the flue gas absorption device comprises a ventilation pipeline and a spraying component, the spraying component comprises a spraying box and a spraying assembly arranged in the spraying box, and the spraying box is provided with a spraying space communicated with the ventilation pipeline; the ventilation pipeline is used for ventilating flue gas into the spraying space; the flue gas treatment tower comprises a tower body and a spraying component, the tower body is provided with an air inlet at the bottom and an air outlet at the top; the spraying space is provided with a ventilation outlet communicated with the air inlet; the tower body is provided with, above the air inlet, a filler layer, a spraying layer and a demisting layer in sequence; the spraying component comprises at least three groups of spraying assemblies arranged in the spraying layer; the spraying assembly comprises a liquid delivery pipe, a branch pipe arranged perpendicularly to the liquid delivery pipe and spraying nozzles arranged on both sides of the branch pipe.

[0007] The flue gas purification system combines the flue gas absorption device and the flue gas treatment tower, pre-treats the flue gas through the front spraying space, reduces the load of the spraying layer of the tower body, realizes the staged removal and recycling of pollutants through the multi-stage absorption process, and thus meets the environmental protection requirements of flue gas emission; meanwhile, at least three groups of spraying assemblies are arranged at offset angles to form staggered and overlapped atomization areas, avoid the overlapping or gap of the spraying trajectories of adjacent spraying assemblies, ensure the sufficient contact between the flue gas and the spraying water, eliminate the spraying dead angle, improve the purification efficiency and significantly improve the reaction efficiency.

[0008] Further, the solution sprayed by the spraying assembly is NaOH solution, and the solution sprayed by the spraying assembly is Ca(OH)2 slurry.

[0009] Further, the flue gas purification system further comprises a recovery component; the recovery component comprises a recovery assembly and a circular pool body arranged below the tower body, the outer circle of the circular pool body is provided with a water outlet, and the bottom center of the circular pool body is provided with a sedimentation hole; the recovery assembly comprises a water circulation unit and a sediment collection unit; the water circulation unit is provided with a water inlet communicated with the water outlet, and the sediment collection unit is provided with a mud suction port communicated with the sedimentation hole.

[0010] Further, the recovery component further comprises a mud scraping assembly arranged in the circular pool body, the mud scraping assembly comprises a driving unit and a mud scraping unit, the driving unit is arranged at the center of the circular pool body, and the mud scraping unit comprises a rotating frame and at least two groups of scraper groups symmetrically arranged on the rotating frame.

[0011] Further, a plurality of arc-shaped mud scraping plates are arranged on the scraper group, and the mud scraping plates are arranged at an inclined angle towards the center of the circular pool body.

[0012] Further, the water circulation unit comprises a circulating water pump, a circulating water tank, and a circulating water pipe connecting the circulating water pump and the circulating water tank, the circulating water pump pumps out water in the water outlet and delivers the water to the circulating water tank; the sediment collection unit comprises a collection pump and a transfer tank, the collection pump pumps out the sediment in the sediment hole and delivers the sediment to the transfer tank.

[0013] Further, the infusion tube is provided with at least a first branch tube, a second branch tube and a third branch tube; the diameters of the first branch tube, the second branch tube and the third branch tube decrease in turn.

[0014] Further, the spraying assembly comprises a first spraying group and a second spraying group connected in turn; the spraying tank comprises a first spraying barrel, a second spraying barrel and a connecting pipeline connecting the first spraying barrel and the second spraying barrel; the first spraying group comprises a first cyclone unit arranged in the first spraying barrel and a first spraying unit arranged above the first cyclone unit; the second spraying group comprises a second cyclone unit arranged in the second spraying barrel and a second spraying unit arranged above the second cyclone unit.

[0015] Further, the spraying space as a whole has an N-shaped structure, the flue gas enters from the middle part of the first spraying barrel, passes through the first cyclone unit, the first spraying unit, the connecting pipeline, the bottom of the second spraying barrel, the second cyclone unit and the second spraying unit in turn.

[0016] Further, the flue gas absorption device further comprises a collecting component, the bottom of the first spraying barrel is provided with a first outlet, and the bottom of the second spraying barrel is provided with a second outlet; the collecting component comprises a first collecting groove arranged at the bottom of the first spraying barrel and a second collecting groove arranged at the bottom of the second spraying barrel. BRIEF DESCRIPTION OF DRAWINGS

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

[0018] Figure 1 is a structural schematic diagram of the flue gas treatment system according to an embodiment of the application Figure One ;

[0019] Figure 2 is a structural schematic diagram of the flue gas treatment tower according to an embodiment of the application

[0020] Figure 3 is a structural sectional view of the flue gas absorption device according to an embodiment of the application

[0021] Figure 4is a structural cross-sectional view of a flue gas treatment tower according to one embodiment of the present invention;

[0022] Figure 5 This is a schematic diagram of the structure of the flue gas treatment system according to one embodiment of the present invention. Figure Two ;

[0023] Figure 6 1 is a schematic structural diagram of a spray component according to an embodiment of the present invention;

[0024] Figure 7 This is a schematic diagram of the structure of the flue gas absorption device according to one embodiment of the present invention. Figure One ;

[0025] Figure 8 This is a schematic diagram of the structure of the flue gas absorption device according to one embodiment of the present invention. Figure Two .

[0026] Description of reference numerals:

[0027] 1. Flue gas absorption device; 2. Flue gas treatment tower; 3. Ventilation duct; 4. Spraying components; 5. Tower body; 6. Spraying components; 7. Recovery components; 8. Collection components; 9. Material receiving device;

[0028] 41. Spray box; 42. Spray assembly; 43. First spray group; 44. Second spray group;

[0029] 411. First spray barrel; 412. Second spray barrel; 413. Connecting pipe;

[0030] 431. First cyclone unit; 432. First spraying unit;

[0031] 441. Second cyclone unit; 442. Second spraying unit;

[0032] 501, air inlet; 502, air outlet;

[0033] 51. Filling layer; 52. Spraying layer; 53. Demisting layer;

[0034] 61. Spray assembly; 62. Infusion tube; 63. Branch pipe; 64. Spray nozzle;

[0035] 621, first branch pipe; 622, second branch pipe; 623, third branch pipe;

[0036] 71. Recovery assembly; 72. Circular tank body; 73. Water circulation unit; 74. Sediment collection unit; 75. Sludge scraping assembly;

[0037] 731. Circulating water pump; 732. Circulating water tank; 733. Circulating water pipe;

[0038] 741, collecting pump; 742, transfer tank;

[0039] 751, driving unit; 752, mud scraping unit; 753, trolley; 754, scraper group;

[0040] 81, first collecting tank; 82, second collecting tank;

[0041] 91, pushing component; 92, dumping component; 93, moving component. DETAILED DESCRIPTION

[0042] In order to make the objectives, technical solutions and advantages of the present application clearer, the present application will be further described in detail below with reference to the embodiments thereof. It should be understood that the specific embodiments described herein are only used to explain the present application and do not limit the protection scope of the present application.

[0043] It should be noted that when an element is referred to as being "fixed" to another element, it can be directly on the other element or there can be intervening elements. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements can be present. As used herein the terms "vertical", "horizontal", "left", "right", and the like are used for explanation purposes only and are not intended to limit the present application.

[0044] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description of the application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0045] The "first", "second" in the present application do not represent the specific number and order, but only for the name of the distinction.

[0046] As Figure 1 and Figure 2 , Figure 3As shown, the flue gas purification system in an embodiment of the present application comprises a flue gas absorption device 1 and a flue gas treatment tower 2; the flue gas absorption device 1 comprises a ventilation pipeline 3 and a spraying component 4, the spraying component 4 comprises a spraying box 41 and a spraying assembly 42 arranged in the spraying box 41, the spraying box 41 is provided with a spraying space communicated with the ventilation pipeline 3; the ventilation pipeline 3 is used for introducing flue gas into the spraying space; the flue gas treatment tower 2 comprises a tower body 5 and a spraying component 6, the tower body 5 is provided with an air inlet 501 at the bottom and an air outlet 502 at the top; the spraying space is provided with a ventilation outlet communicated with the air inlet 501; the tower body 5 is sequentially provided with a filler layer 51, a spraying layer 52 and a demisting layer 53 above the air inlet 501; the spraying component 6 comprises at least three groups of spraying assemblies 61 arranged in the spraying layer 52; the spraying assembly 61 comprises a liquid delivery pipe 62, a branch pipe 63 arranged perpendicularly to the liquid delivery pipe 62 and spraying nozzles 64 arranged on both sides of the branch pipe 63.

[0047] The flue gas purification system above, through the combination of the flue gas absorption device 1 and the flue gas treatment tower 2, pre-treats the flue gas through the front spraying space, reduces the load of the spraying layer 52 of the tower body 5, and the multi-stage absorption process can realize the staged removal and resource recovery of pollutants, so as to meet the environmental protection requirements of flue gas emission; at the same time, by arranging at least three groups of spraying assemblies 61 arranged at an offset angle, an interlaced coverage atomization area is formed, the spraying trajectories of adjacent spraying assemblies 61 are avoided to overlap or have a gap, the flue gas is ensured to fully contact with the spraying water, the spraying dead angle is eliminated, the purification efficiency is improved, and the reaction efficiency is significantly improved.

[0048] In one of the embodiments, the liquid delivery pipes 62 of the spraying assemblies 61 are arranged at an offset angle, and the offset angle ranges from 15° to 45°. By arranging at least three groups of spraying assemblies 61 and arranging the liquid delivery pipes at an offset angle ranging from 15° to 45°, an interlaced coverage atomization area is formed, the spraying trajectories of adjacent spraying assemblies are avoided to overlap or have a gap, the flue gas is ensured to fully contact with the spraying water, the spraying dead angle is eliminated, the purification efficiency is improved, and the desulfurization and dust removal efficiency is significantly improved; at the same time, the spraying nozzles symmetrically arranged on both sides of the branch pipe can disperse the liquid pressure, combined with the asymmetric washing effect caused by the offset angle, the formation of scale or deposits on the surface of the filler layer 51 is reduced, and the continuous operation period of the equipment is prolonged.

[0049] In one embodiment, the offset angle is 20°. In this way, by limiting the offset angle between the spray assemblies 61 to 20°, the mixing efficiency of the airflow and the liquid droplets is further optimized while ensuring that the spray coverage density is maximized; compared to a smaller angle (e.g., 15°), the 20° offset angle reduces the edge overlap of adjacent spray areas, reducing liquid waste; and compared to a larger angle (e.g., 45°), the layout of the offset angle is more compact, avoiding the problem of the expansion of the spray blind area due to the excessively large angle.

[0050] In one embodiment, the solution sprayed by the spraying assembly 42 is a NaOH solution, and the solution sprayed by the spray assembly 61 is a Ca(OH)2 slurry. In large aluminum production enterprises, the composition of the exhaust gas is complex, often containing fluorides (HF), particulate matter (aluminum oxide dust), VOCs (benzene series, esters), acid gases (HCl, H2SO4 mist), and heavy metals (such as lead and chromium in coatings).

[0051] Under the spraying action of the spraying assembly 42, the heavy metals (such as lead, chromium, cadmium, etc.) form insoluble precipitates with the NaOH solution in the following way: by adjusting the pH to alkaline (usually pH≥9), heavy metal ions combine with OH- to form hydroxide precipitates:

[0052] Pb 2+ +2OH - → Pb(OH)2↓

[0053] Cr 3+ +3OH - → Cr(OH)3↓

[0054] Under the spraying action of the spraying assembly 61, the HF contained in the aluminum production exhaust gas, which may have residual fluoride ions in the previous treatment, reacts with the calcium salt in the Ca(OH)2 slurry to form CaF2 precipitate:

[0055] 2F - +Ca 2+ → CaF2↓

[0056] In addition, the oxidation of chlorinated organic compounds (such as chlorinated solvents) involved in the VOCs degradation process generates chloride salt precipitates:

[0057] The specific reaction mechanism is as follows: chlorinated VOCs (such as tetrachloroethylene) are decomposed into CO2, H2O, and HCl in catalytic oxidation, and HCl reacts with Ca(OH)2 slurry to form calcium chloride:

[0058] 2HCl + Ca(OH)2 → CaCl2 + 2H2O

[0059] CaCl2 has high solubility and usually exists in dissolved state; excessive addition of alkaline reagents can react with other anions (such as SO4 2- ) produces calcium sulfate (CaSO4) precipitate.

[0060] like Figure 4 and Figure 5 As shown, in one embodiment, a recovery component 7 is further included; the recovery component 7 includes a recovery assembly 71 and a circular pool body 72 arranged below the tower body 5, the outer circle of the circular pool body 72 is provided with a water outlet, and the bottom center of the circular pool body 72 is provided with a sedimentation hole; the recovery assembly 71 includes a water circulation unit 73 and a sedimentation collection unit 74; the water circulation unit 73 is provided with a water inlet connected to the water outlet, and the sedimentation collection unit 74 is provided with a mud extraction port connected to the sedimentation hole. In this way, it is convenient for the sediment to be deposited in the circular pool body 72 and fall into the sedimentation hole at the bottom center, and then be extracted to the sedimentation collection unit 74 for sedimentation collection and processing, thereby improving the sedimentation processing efficiency and avoiding the influence of excessive sedimentation on the chemical reaction efficiency.

[0061] In one embodiment, the recovery unit 7 further includes a scraper assembly 75 disposed on the circular pool body 72. The scraper assembly 75 includes a drive unit 751 and a scraper unit 752. The drive unit 751 is disposed at the center of the circular pool body 72. The scraper unit 752 includes a rotating frame 753 and at least two scraper assemblies 754 symmetrically disposed on the rotating frame 753. Thus, the rotating frame 753 is driven to rotate by the drive unit 751, so that the at least two scraper assemblies 754 scrape the bottom wall of the circular pool body 72, so that the sediment is concentrated to the center of the circular pool body 72 along with the scraper assemblies 754 and then falls into the sedimentation hole.

[0062] In one embodiment, the scraper assembly 754 is provided with a plurality of arc-shaped scrapers, which are arranged at an inclined angle toward the center of the circular pool body 72. In this way, the scrapers can collect the sediment into the sedimentation hole for processing, thereby preventing sediment accumulation at the bottom of the circular pool body 72.

[0063] In one embodiment, the bottom of the circular tank body 72 is an inverted cone, and the sedimentation hole is located at the conical portion of the inverted cone. Specifically, the scraper blade is attached to the conical surface of the inverted cone. This facilitates the sediment to fall due to its own weight to the mud outlet of the sedimentation hole at the bottom of the circular tank body 72, thereby preventing sediment accumulation from clogging the pipeline and reducing sedimentation treatment efficiency.

[0064] In one embodiment, the water circulation unit 73 includes a circulating water pump 731, a circulating water tank 732, and a circulating water pipe 733 connecting the circulating water pump 731 and the circulating water tank 732; the sediment collection unit 74 includes a collection pump 741 and a transfer tank 742, and the collection pump 741 pumps the sediment from the sedimentation hole into the transfer tank 742. Specifically, the circulating water tank 732 is connected to the spray component 6. In this way, the circulating water pump 731 pumps the water from the water outlet and transports the water to the circulating water tank 732, thereby returning part of the unreacted solution to the circulating water tank 732, and pumping it to the spray assembly 61 through the spray pump of the spray component 6.

[0065] In one embodiment, the recovery component 7 includes a chamber filter press, which is provided with a mud inlet and a drain outlet; the chamber filter press includes a bracket, which includes two parallel crossbeams, and a plurality of filter plates are slidably connected to the two crossbeams. A pressure plate and a thrust plate are respectively provided at both ends of the bracket. The bracket is located at one end of the pressure plate and is provided with an oil cylinder for driving the pressure plate. Grooves are provided on both sides of the filter plate, and push plates are provided in the grooves. A drive assembly for driving the two push plates to move toward both sides is provided in the filter plate. In this way, the chamber filter press pumps the sludge from the transfer tank 742 into the filter pressure space formed by the filter plate through the mud inlet. The oil cylinder drives the pressure plate to squeeze the filter pressure space, and the squeezed water returns to the transfer tank 742 through the drain outlet.

[0066] In one embodiment, the filter plate is provided with a connecting groove extending through one side thereof, a chute connected to the connecting groove is provided at the bottom of the connecting groove, the connecting groove is connected to the groove, and the drive assembly includes two sliding rods slidably connected to the chute, the two sliding rods are respectively fixedly connected to two push plates, a plurality of springs are provided between the push plates and the bottom of the groove, and a drive member for controlling the movement of the two sliding rods is provided in the connecting groove. Thus, by inserting the drive rod into the connecting groove, the two push plates are pushed toward the sides of the filter plate by the top, thereby separating the filter plate from the filter cake adhered to the filter plate, facilitating unloading, and thereby improving the sludge treatment efficiency.

[0067] like Figure 2 and Figure 6As shown, in one of the embodiments, the infusion pipe 62 is provided with at least a first branch pipe 621, a second branch pipe 622 and a third branch pipe 623; the diameters of the first branch pipe 621, the second branch pipe 622 and the third branch pipe 623 decrease in turn. In this way, the gradient pipe diameter design is adapted to the liquid pressure distribution law, the first branch pipe 621 near the inlet of the infusion pipe 62 can bear higher flow, avoiding uneven liquid injection caused by too high pressure at the inlet end; the decreasing pipe diameter of the subsequent branch pipes maintains the stability of the end spraying pressure, ensuring the consistent atomization effect of the spray nozzle mist 64.

[0068] As shown, Figure 3 As shown, in one of the embodiments, the spraying assembly 42 includes a first spraying group 43 and a second spraying group 44 which are sequentially communicated; the spraying box 41 includes a first spraying barrel 411, a second spraying barrel 412 and a connecting pipeline 413 which connects the first spraying barrel 411 and the second spraying barrel 412; the first spraying group 43 includes a first cyclone unit 431 arranged in the first spraying barrel 411 and a first spraying unit 432 arranged above the first cyclone unit 431; the second spraying group 44 includes a second cyclone unit 441 arranged in the second spraying barrel 412 and a second spraying unit 442 arranged above the second cyclone unit 441. In this way, the segmented processing of the first spraying group 43 and the second spraying group 44 forms a double-stage purification of “rough processing-precise processing”; at the same time, the cyclone unit preferentially removes large particles of dust, and the spraying unit targets fine contaminants, with clear division of labor, avoiding overloading of a single processing unit and improving the stability of the spraying assembly 42.

[0069] In one of the embodiments, the spraying space as a whole has an N-shaped structure, the flue gas enters from the middle of the first spraying barrel 411, sequentially passes through the first cyclone unit 431, the first spraying unit 432, the connecting pipeline 413, the bottom of the second spraying barrel 412, the second cyclone unit 441 and the second spraying unit 442. In this way, the N-shaped structure prolongs the residence time of the flue gas, strengthens the gas-liquid contact through the effect of flow deflection, and at the same time, the compact structure reduces the equipment area; at the same time, the design of the flue gas path entering from the middle and turning back at the bottom effectively utilizes the principle of gravity sedimentation to preliminarily separate liquid droplets and particulate matter.

[0070] In one embodiment, the flue gas absorption device 1 further includes a collecting component 8, wherein a first outlet is provided at the bottom of the first spray barrel 411, and a second outlet is provided at the bottom of the second spray barrel 412; the collecting component 8 includes a first collecting trough 81 provided at the bottom of the first spray barrel 411, and a second collecting trough 82 provided at the bottom of the second spray barrel 412. In this way, the first collecting trough 81 and the second collecting trough 82 correspond to the waste liquid collection of the first spray barrel 411 and the second spray barrel 412, respectively, to achieve classified recovery of liquids with different degrees of pollution. Specifically, the first collecting trough 81 mainly recovers high-concentration dust slurry, and the second collecting trough 82 processes low-concentration waste liquid, which facilitates subsequent quality separation or resource utilization, thereby reducing the overall processing cost.

[0071] like Figure 7 and Figure 8 As shown, in one embodiment, it also includes a material receiving device 9, which includes a pushing component 91 and a dumping component 92; the first collecting trough 81 is arranged on the spray bracket of the flue gas absorption device 1 through a sliding structure, and the sliding structure includes a sliding flange arranged at the bottom of the first collecting trough 81, and a sliding groove arranged on the spray bracket; the dumping component 92 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 91 is used to push the first collecting trough 81 out of the spray bracket and push it to 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.

[0072] In one embodiment, the material receiving device 9 also includes a moving component 93 arranged at the bottom of the mounting support; the moving component 93 includes a fixed seat, a moving seat, and a rodless cylinder that drives the moving seat to move relative to the fixed seat; the rodless cylinder drives the moving seat to move back and forth between the first dumping station and the second dumping station, the first dumping station is located on the side of the first collecting trough 81, and the first dumping station is located on the side of the second collecting trough 82; the dumping component 92 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 provided 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. The first cylinder drives the first locking seat to move, thereby switching the locking state or the release 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 release state of the second rotating pin.

[0073] The technical features of the above-described embodiments can be combined in any manner. For the sake of brevity, not all possible combinations of the technical features are described, but it is understood that the scope of the present disclosure includes all possible combinations.

[0074] The above-described embodiments only express several implementation manners of the present application, and the description is relatively specific and detailed, but it should not be understood as a limitation on the scope of the patent. It should be pointed out that, for ordinary skilled persons in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which are within the scope of protection of the present application. Therefore, the scope of protection of the patent of the present application should be subject to the appended claims.

Claims

1. A flue gas purification system, characterized in that: It includes a flue gas absorption device and a flue gas treatment tower; The fume absorption device includes a ventilation pipe and a spraying component, 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 pipe; The ventilation duct is used to pass the smoke into the spraying space; The flue gas treatment tower comprises a tower body and a spray component, wherein the bottom of the tower body is provided with an air inlet and the top is provided with an air outlet; The spraying space is provided with an air outlet communicated with the air inlet; The tower body is provided with a packing layer, a spray layer and a demisting layer in sequence above the air inlet; The spray component includes at least three groups of spray assemblies arranged on the spray layer; The spray assembly comprises a liquid infusion pipe, a branch pipe arranged perpendicular to the liquid infusion pipe, and spray nozzles arranged on both sides of the branch pipe.

2. A flue gas purification system according to claim 1, characterized in that: The solution sprayed by the spraying assembly is NaOH solution, and the solution sprayed by the shower assembly is Ca(OH)2 slurry.

3. A flue gas purification system according to claim 1, characterized in that: Also includes recycled parts; The recovery component includes a recovery assembly and a circular pool body arranged below the tower body, a water outlet is provided at the outer circle of the circular pool body, and a sedimentation hole is provided at the bottom center of the circular pool body; The recovery component includes a water circulation unit and a sediment collection unit; The water circulation unit is provided with a water inlet communicated with the water outlet, and the sediment collection unit is provided with a mud pumping port communicated with the sedimentation hole.

4. A flue gas purification system according to claim 3, characterized in that: The recovery component also includes a scraper assembly arranged in the circular pool body, the scraper assembly includes a drive unit and a scraper unit, the drive unit is arranged in the center of the circular pool body, and the scraper unit includes a rotating frame and at least two scraper groups symmetrically arranged on the rotating frame.

5. A flue gas purification system according to claim 4, characterized in that: The scraper group is provided with a plurality of arc-shaped scrapers, and the scrapers are arranged at an inclined angle toward the center of the circular pool body.

6. A flue gas purification system according to claim 3, characterized in that: The water circulation unit includes a circulating water pump, a circulating water tank, and a circulating water pipe connecting the circulating water pump and the circulating water tank. The circulating water pump pumps the water from the water outlet and transports the water to the circulating water tank. The sediment collection unit includes a collection pump and a transfer tank. The collection pump pumps the sediment from the sedimentation hole into the transfer tank.

7. The flue gas purification device according to claim 1, characterized in that: The infusion tube is provided with at least a first branch tube, a second branch tube and a third branch tube; The diameters of the first branch pipe, the second branch pipe and the third branch pipe decrease in sequence.

8. A flue gas treatment system according to claim 7, characterized in that: The spray assembly includes a first spray group and a second spray group that 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 spraying group includes a first cyclone unit disposed in the first spraying barrel, and a first spraying unit disposed above the first cyclone unit; The second spraying group includes a second cyclone unit disposed in the second spraying barrel and a second spraying unit disposed above the second cyclone unit.

9. A flue gas treatment system according to claim 8, characterized in that: The spraying space has an N-shaped structure as a whole. 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.

10. A flue gas treatment system according to claim 9, characterized in that: The fume absorption device further 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 provided at the bottom of the first spray barrel, and a second collecting trough provided at the bottom of the second spray barrel.

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