Spray tower for tail gas treatment system

Abstract

The invention relates to the technical field of spray towers, and discloses a spray tower for a tail gas treatment system, the spray tower comprises a tower body, a circulating water tank is fixedly arranged at the bottom of the tower body, a gas inlet end is fixedly arranged on the lower side wall of the tower body, a plurality of layers of pore plates are fixedly arranged in the tower body, and a filler layer is fixedly arranged above the pore plates. An air outlet end is fixedly arranged at the top end of the tower body, a filtering assembly is fixedly arranged in the circulating water tank and comprises an air inlet pipe, the top end of the air inlet pipe is fixedly connected with the top end of the tower body, and the bottom end of the air inlet pipe penetrates through the circulating water tank and is fixedly connected with a first cylinder; and a barrel II is slidably connected to the interior of the barrel I. Impurities in washing liquid are filtered through the filter screen, the cyclic utilization effect is achieved, the filter screen is backwashed through pushing force generated when filtered gas in the tower body flows, the impurities are carried and discharged through the blow-off pipe, and the automatic cleaning effect is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of spray towers, and specifically to a spray tower for a tail gas treatment system. Background Art

[0002] Currently, waste gas treatment is usually carried out using waste gas treatment equipment such as adsorption towers and spray towers. In addition to harmful gas components, the waste gas usually also contains a large amount of dust particle impurities. Currently, the washing liquid of the spray tower is usually recycled. Generally, a pump body is arranged on one side of the bottom of the spray tower, and the pump body sprays the washing liquid that flows back to the bottom of the spray tower through the liquid pipeline from the atomizing nozzles of each layer again. However, a large amount of particulate impurities in the waste gas will continuously accumulate in the washing liquid, resulting in a decline in the treatment effect of the washing liquid, and at the same time, it will also cause blockage problems for the pump body and pipelines.

[0003] After retrieval, a spray tower is disclosed in the publication number: CN118161942B, which belongs to the technical field of waste gas treatment. It includes a tower body. An air inlet is opened on one side of the bottom of the tower body, and an air outlet is arranged at the top of the tower body; the pump body is arranged outside the tower body; the spray pipeline is arranged outside the tower body, the packing layer is arranged inside the tower body and divides the tower body into multiple filtering chambers, and there are multiple spray layers, and the spray layers correspond to the filtering chambers one by one; the filtering component is arranged on the inner wall of the tower body below the bottommost packing layer, and the liquid filtered by the filtering component flows into the bottom of the tower body; among them, a water collection structure for collecting the liquid falling from above is arranged on the grid plate, and the water collection structure conveys the liquid to be filtered to the filtering component.

[0004] In the above application, the device collects impurities through a slag storage chamber, and the slag storage chamber is located inside the tower, which is not convenient for timely cleaning. Summary of the Invention

[0005] Aiming at the deficiencies of the prior art, the present invention provides a spray tower for a tail gas treatment system, which solves the problems that the accumulation of particulate impurities in the waste gas leads to a decline in the treatment effect of the washing liquid, and at the same time, it will also cause blockage problems for the pump body and pipelines.

[0006] To achieve the above objectives, the present invention is realized through the following technical solutions: A spray tower for a tail gas treatment system, comprising a tower body. A circulation water tank is fixedly arranged at the bottom of the tower body. An air inlet end is fixedly arranged on the lower side wall of the tower body. A plurality of perforated plates are fixedly arranged inside the tower body. A packing layer is fixedly arranged above the perforated plates. An air outlet end is fixedly arranged at the top of the tower body. A filtering component is fixedly arranged inside the circulation water tank. The filtering component includes an air inlet pipe. The top end of the air inlet pipe is fixedly connected to the top of the tower body. The bottom end of the air inlet pipe penetrates through the circulation water tank and is fixedly connected to a first cylinder. A second cylinder is slidably connected inside the first cylinder. A water outlet is formed on the lower surface of the second cylinder. The other end of the second cylinder is inserted with a third cylinder. One end of the third cylinder is fixedly connected to a sewage discharge pipe. The sewage discharge pipe penetrates through the circulation water tank. A circulation pipe is fixedly arranged on the upper surface of the third cylinder. The top end of the circulation pipe is fixedly arranged at the bottom of the tower body. A plurality of openings are formed at one end of the second cylinder, and a filter screen is rotatably connected to the other end of the second cylinder. A rotating rod is fixedly connected inside the filter screen. The other end of the rotating rod is rotatably connected to a sealing block. A spraying component is installed on the tower body and the circulation water tank.

[0007] Preferably, a first solenoid valve is fixedly arranged at the top end of the air inlet pipe, a check valve is fixedly arranged at the bottom end of the air inlet pipe, and a second solenoid valve is fixedly arranged on the surface of the air outlet end.

[0008] Preferably, a raised layer is fixedly arranged inside the first cylinder, and a tension spring is fixedly connected to the inner side wall of the first cylinder. The other end of the tension spring is fixedly connected to the second cylinder.

[0009] Preferably, a rotating sleeve is slidably connected to the surface of the rotating rod. Annularly distributed blades are fixedly connected to the outer wall of the rotating sleeve. One end of the rotating sleeve is rotatably connected to a limiting frame. One side of the limiting frame is fixedly connected to the inner side wall of the third cylinder.

[0010] Preferably, the filtering component further includes a return water tank and a threaded groove. The return water tank is fixedly installed on the outer wall of the upper side of the circulation water tank. The threaded groove is formed on the outer side wall of the circulation water tank and is coaxially arranged with the sewage discharge pipe. A filter cartridge is threadedly connected inside the threaded groove. An air outlet is formed on the upper side wall of the return water tank.

[0011] Preferably, the top end of the return water tank is open, and a cover plate is rotatably connected to the top of the return water tank through a shaft. A return water pipe is fixedly arranged on the lower side wall of the return water tank. The other end of the return water pipe is fixedly arranged on the side wall of the circulation water tank.

[0012] Preferably, the filter cartridge includes an outer cylinder and an inner cylinder connected in a sliding manner. A baffle is fixedly connected to the outer wall of the inner cylinder, and an extrusion column is fixedly connected to the inner wall of the inner cylinder. A mounting seat is fixedly connected to the inner bottom wall of the return water tank. A T-shaped connecting rod is slidably connected to the surface of the mounting seat. One end of the connecting rod is fixedly connected with a sealing head, and an elastic member is sleeved on the surface of the connecting rod.

[0013] Preferably, the spraying assembly includes an infusion pipe. The bottom end of the infusion pipe is fixedly connected to the circulating water tank. A water pump is fixedly arranged on the infusion pipe, and the top end of the infusion pipe penetrates into the interior of the tower body. The top end of the infusion pipe is rotatably connected with a spraying pipe. A plurality of groups of atomizing nozzles are fixedly arranged on the surface of the spraying pipe. Each group of atomizing nozzles is cross-distributed with the packing layer. The bottom end of the infusion pipe penetrates through the packing layer and the orifice plate and is fixedly connected with an impeller.

[0014] Preferably, the spraying assembly further includes a plurality of horn-shaped flow guiding covers. The flow guiding covers are cross-distributed with the packing layer, and the outer wall of the flow guiding cover is fixedly connected to the inner wall of the tower body. A spraying chamber is fixedly arranged at the top end of the flow guiding cover.

[0015] Preferably, a drain pipe is fixedly connected to the outer edge of the flow guiding cover. The drain pipe penetrates through the packing layer and the orifice plate below.

[0016] Working principle: Tail gas is introduced through the air inlet end. The harmful components in the tail gas are absorbed through the packing layer. The washing liquid in the circulating water tank is pumped by a water pump and enters the spraying pipe through the infusion pipe and is sprayed out by the atomizing nozzles. When the tail gas enters the interior of the tower body through the air inlet end, it drives the impeller to rotate. The impeller drives the spraying pipe to rotate, so that the atomizing nozzles can generate an annular spraying layer, expanding the spraying area, and enabling the tail gas to be better combined with the washing liquid. When the tail gas flows upward, it is guided by the flow guiding cover to move upward from the middle of the flow guiding cover into the spraying chamber with a smaller diameter, and the spraying layer generated by the atomizing nozzles is also located in the spraying chamber, making the gas-liquid two-phase contact effect between the tail gas and the washing liquid more obvious.

[0017] When the spraying pipe rotates, it drives the shearing blades to rotate. When the washing liquid is sprayed out by the atomizing nozzles and drips downward, the spraying liquid can be sheared and broken by the shearing blades, enabling the tail gas and the washing liquid to be more fully contacted. The atomizing nozzles and the shearing blades can rotate without additional driving equipment, which can reduce costs, realize the multi-functional application of a single device, and achieve more functional applications with less structural and equipment investment.

[0018] After being sprayed out, the washing liquid gathers at the bottom of the tower body, and then enters the interior of the cylinder body three through the circulation pipe and is discharged from the water outlet to the circulating water tank after being filtered through the filter screen, so as to realize recycling. The impurities in the washing liquid remain in the filter screen. When the filter screen needs to be cleaned, the solenoid valve one is opened to allow the filtered gas in the tower body to enter the interior of the cylinder body one through the air inlet pipe. Under the push of the gas, the cylinder body two is pushed to be plugged into the interior of the cylinder body three, so that the circulation pipe of the cylinder body two is closed, and the water outlet of the cylinder body three is closed to prevent gas from escaping and cut off the entry of the washing liquid. When the cylinder body two moves to the interior of the cylinder body three, the sealing block is driven by the rotating rod to stagger with the sewage pipe, thereby opening the sewage pipe. At this time, the gas enters the interior of the cylinder body two and the cylinder body three through the opening, thereby recoils the filter screen and carries the impurities to be discharged through the sewage pipe, so as to achieve the effect of automatic cleaning.

[0019] When the washing liquid passes through the circulation pipe, it pushes the blades to rotate, the rotation of the blades drives the rotating sleeve to rotate, the rotating sleeve drives the rotating rod to rotate, and the rotating rod drives the filter to rotate to generate centrifugal force to peel off impurities and reduce the adhesion of impurities. At the same time, the filter can switch the contact area with the washing liquid to make more comprehensive use of the filter. When the gas flow acts on the blades, the filter rotates to generate centrifugal force to peel off impurities, thereby improving the cleaning effect of the filter. When the filter rotates, the scraper can clean the surface of the filter to reduce the residual impurities.

[0020] The gas blows the liquid and impurities into the interior of the filter cartridge through the drain pipe at the same time. The liquid flows out through the filter cartridge, while the impurities remain in the filter cartridge, so that the operator can remove the filter cartridge to clean the impurities. The filter cartridge can be removed by opening the cover, and the liquid splashed out of the filter cartridge can be intercepted by closing the cover, so that the liquid is retained in the return water tank to avoid pollution caused by liquid splashing, and the liquid in the return water tank flows back to the circulating water tank through the return pipe, thereby avoiding liquid loss when cleaning impurities and reducing the waste of washing liquid.

[0021] The present invention provides a spray tower for an exhaust gas treatment system. It has the following beneficial effects:

[0022] 1. The present invention filters impurities in the washing liquid through the filter screen to achieve the effect of recycling, and the driving force generated by the flow of the filtered gas in the tower body is used to backwash the filter screen, and the impurities are discharged through the sewage pipe to achieve the effect of automatic cleaning.

[0023] 2. The present invention uses the tension of the tension spring to make the sealing block tightly press against the sewage pipe, thereby achieving the effect of closing the sewage pipe. During recoil, the gas pushes the sealing block to move outward to open the sewage pipe for discharging impurities, thereby realizing automatic opening and closing of the sewage pipe.

[0024] 3. When the washing liquid of the present invention passes through the circulation pipe and when the gas flows, it can both drive the blades to rotate, drive the filter screen to rotate, the rotation of the filter screen generates centrifugal force to peel off impurities, and the surface of the filter screen can be cleaned by the scraper to reduce the residue of impurities.

[0025] 4. The present invention drives the spray pipe to rotate through the tail gas, so that the atomizing nozzle can generate an annular spray layer, expanding the spraying area, and enabling the tail gas to be better combined with the washing liquid. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 is a perspective view of the present invention;

[0027] Figure 2 is a schematic sectional view of the tower body and the circulation water tank of the present invention;

[0028] Figure 3 is a schematic structural view of the filtering component of the present invention;

[0029] Figure 4 is a schematic sectional view of the first cylinder, the second cylinder and the third cylinder of the present invention;

[0030] Figure 5 is a schematic internal structure view of the third cylinder of the present invention;

[0031] Figure 6 is a schematic structural view of the filter screen of the present invention;

[0032] Figure 7 is a schematic sectional view of the return water tank of the present invention;

[0033] Figure 8 of the present invention Figure 7 is an enlarged view at A;

[0034] Figure 9 is a schematic structural view of the spray component of the present invention;

[0035] Figure 10 of the present invention Figure 9 is an enlarged view at B.

[0036] Among them, 1. tower body; 2. circulating water tank; 3. air inlet end; 4. orifice plate; 5. packing layer; 6. filtering component; 601. intake pipe; 602. first cylinder; 603. second cylinder; 604. third cylinder; 605. flow pipe; 606. opening; 607. filter screen; 608. rotating rod; 609. sealing block; 610. solenoid valve 1; 611. check valve; 612. raised layer; 613. tension spring; 614. rotating sleeve; 615. blade; 616. limiting frame; 617. return water tank; 618. filter cartridge; 619. return water pipe; 620. air outlet; 621. baffle; 622. extrusion column; 623. mounting seat; 624. connecting rod; 625. sealing head; 626. elastic member; 627. sewage discharge pipe; 628. cover plate; 629. water outlet; 7. spraying component; 71. liquid delivery pipe; 72. spraying pipe; 73. atomizing nozzle; 74. impeller; 75. flow guide cover; 76. spraying chamber; 77. drain pipe; 8. air outlet end; 9. sealing ring; 10. scraper; 11. shearing blade. Detailed implementation manners

[0037] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0038] Please refer to the attached Figure 1 - attached Figure 5, an embodiment of the present invention provides a spray tower for a tail gas treatment system, which includes a tower body 1. A circulation water tank 2 is fixedly arranged at the bottom of the tower body 1. An air inlet end 3 is fixedly arranged on the lower side wall of the tower body 1. A plurality of perforated plates 4 are fixedly arranged inside the tower body 1. A packing layer 5 is fixedly arranged above the perforated plate 4. An air outlet end 8 is fixedly arranged at the top of the tower body 1. A filtering component 6 is fixedly arranged inside the circulation water tank 2. The filtering component 6 includes an air inlet pipe 601. A solenoid valve I 610 is fixedly arranged at the top end of the air inlet pipe 601. The top end of the air inlet pipe 601 is fixedly connected to the top end of the tower body 1. The bottom end of the air inlet pipe 601 penetrates through the circulation water tank 2 and is fixedly connected to a cylinder I 602, and the intersection of the air inlet pipe 601 and the circulation water tank 2 is welded and sealed. A cylinder II 603 is slidably connected inside the cylinder I 602. A water outlet 629 is arranged on the lower surface of the cylinder II 603. The other end of the cylinder II 603 is inserted with a cylinder III 604. One end of the cylinder III 604 is fixedly connected to a sewage discharge pipe 627. The sewage discharge pipe 627 penetrates through and is welded and sealed with the circulation water tank 2. A circulation pipe 605 is fixedly arranged on the upper surface of the cylinder III 604. The top end of the circulation pipe 605 is fixedly arranged at the bottom of the tower body 1. A plurality of openings 606 are arranged at one end of the cylinder II 603. The other end of the cylinder II 603 is rotatably connected to a filter screen 607. A rotating rod 608 is fixedly connected inside the filter screen 607. The other end of the rotating rod 608 is rotatably connected to a sealing block 609. A sealing gasket is fixedly arranged at the intersection of the sealing block 609 and the sewage discharge pipe 627 to improve the sealing effect. A spray component 7 is installed on the tower body 1 and the circulation water tank 2. The packing layer 5 is provided with three layers. The packing of the lower two layers of the packing layer 5 is used to promote the adsorption treatment of harmful components in the gas by the washing liquid. The packing of the uppermost packing layer 5 mainly plays a role in demisting. The packing can use the existing Raschig rings. A negative pressure fan can be fixedly arranged separately or jointly above the tower body 1 or inside the air inlet end 3. The negative pressure fan inside the air inlet end 3 is used to accelerate the circulation of the tail gas. The negative pressure fan above the tower body 1 is used to accelerate the discharge of the gas and make the gas inside the air inlet pipe 601 have a certain thrust. In this solution, the filter screen 607 is cleaned by the driving force when the gas flows in the spray tower. When the gas flow rate in the spray tower is slow, the top end of the air inlet pipe 601 can be connected to an air compressor to accelerate the gas flow rate in the filtering cylinder 618 component.

[0039] Specifically, the filter screen 607 is set in a plate shape, a hemispherical shape or a cone shape. The inner walls of the opposite ends of the cylinder body 1 602 and the cylinder body 3 604 are respectively fixed with sealing rings 9 to improve the sealing performance with the cylinder body 2 603. The exhaust gas is introduced through the air inlet end 3, and the harmful components in the exhaust gas are absorbed by the packing layer 5. The washing liquid in the circulating water tank 2 is extracted through the spray component 7 and sprayed out from the tower. After the washing liquid is sprayed out, it is collected at the bottom of the tower body 1, and then enters the interior of the cylinder body 3 604 through the circulation pipe 605 and is filtered by the filter screen 607 and then discharged from the water outlet 629 to flow back into the circulating water tank 2 to achieve recycling. The impurities in the washing liquid remain in the filter screen 607. When the filter screen 607 needs to be cleaned, the solenoid valve 1 610 is opened. , so that the filtered gas in the tower body 1 enters the interior of the cylinder 1 602 through the air inlet pipe 601, and the cylinder 2 603 is pushed to move toward the interior of the cylinder 3 604 under the push of the gas, so that the cylinder 2 603 closes the circulation pipe 605, and the cylinder 3 604 closes the water outlet 629 to prevent gas escape and cut off the entry of the washing liquid. When the cylinder 2 603 moves toward the interior of the cylinder 3 604, the sealing block 609 is driven by the rotating rod 608 to stagger with the sewage pipe 627, thereby opening the sewage pipe 627. At this time, the gas enters the interior of the cylinder 2 603 and the cylinder 3 604 through the opening 606, thereby backflushing the filter 607, and carrying impurities through the sewage pipe 627 to achieve the effect of automatic cleaning.

[0040] Please see attached Figure 3 A one-way valve 611 is fixedly provided at the bottom end of the air inlet pipe 601, and a solenoid valve 2 is fixedly provided on the surface of the air outlet end 8.

[0041] Specifically, the one-way valve 611 is used to control the unidirectional flow of gas from top to bottom inside the intake pipe 601. During cleaning, by closing the solenoid valve 2, the treated gas can only flow out through the intake pipe 601. The diameter of the intake pipe 601 is small, so the flow rate of the gas can be increased, thereby improving the recoil effect on the filter 607.

[0042] Please see attached Figure 4 A raised layer 612 is fixedly disposed inside the cylinder 1 602 , and a tension spring 613 is fixedly connected to the inner wall of the cylinder 1 602 , and the other end of the tension spring 613 is fixedly connected to the cylinder 2 603 .

[0043] Specifically, the tension of the tension spring 613 pulls the second cylinder 603 against the convex layer 612, so that the water outlet 629 is located outside the third cylinder 604. After closing the first solenoid valve 610 to stop the gas input, the second cylinder 603 can be restored by the tension of the tension spring 613, thereby opening the water outlet 629 and the flow pipe 605 to continue filtering the washing liquid. At the same time, the tension of the tension spring 613 acts on the sealing block 609 through the second cylinder 603, the filter screen 607 and the rotating rod 608. When the second cylinder 603 abuts against the convex layer 612, the sealing block 609 tightly abuts against the sewage discharge pipe 627, thereby achieving the effect of closing the sewage discharge pipe 627. Moreover, the driving force exerted on the filter screen 607 by the water flow can further pull the sealing block 609 to closely fit the sewage discharge pipe 627, improving the sealing effect.

[0044] Please refer to the appendix Figure 4 - appendix Figure 6 A rotating sleeve 614 is slidably connected to the surface of the rotating rod 608. Annularly distributed blades 615 are fixedly connected to the outer wall of the rotating sleeve 614. One end of the rotating sleeve 614 is rotatably connected to a limiting frame 616. One side of the limiting frame 616 is fixedly connected to the inner side wall of the third cylinder 604. A scraper 10 is disposed in a fitting manner on the inner side wall of the filter screen 607. Both ends of the scraper 10 are fixedly connected to the inner wall of the second cylinder 603, and the rotating rod 608 penetrates through the scraper 10.

[0045] Specifically, the rotating rod 608 can horizontally move through the rotating sleeve 614. When the rotating sleeve 614 rotates, it drives the rotating rod 608 to rotate. The limiting frame 616 is used to support the rotating sleeve 614. The blades 615 are installed directly below the flow pipe 605. When the washing liquid passes through the flow pipe 605, it pushes the blades 615 to rotate. The rotation of the blades 615 drives the rotating sleeve 614 to rotate. The rotating sleeve 614 drives the rotating rod 608 to rotate. The rotating rod 608 drives the filter screen 607 to rotate to generate centrifugal force to peel off impurities, reducing the adhesion of impurities. At the same time, the filter screen 607 can switch the contact area with the washing liquid, and the filter screen 607 can be utilized more comprehensively. When the gas flow acts on the blades 615, the filter screen 607 rotates to generate centrifugal force to peel off impurities, improving the cleaning effect of the filter screen 607. When the filter screen 607 rotates, the surface of the filter screen 607 can be cleaned by the scraper 10, reducing the residue of impurities.

[0046] Please refer to the appendix Figure 7, the filtering component 6 further includes a water return tank 617 and a threaded groove. The water return tank 617 is fixedly installed on the upper outer wall of the circulating water tank 2. The threaded groove is opened on the outer wall of the circulating water tank 2 and is coaxially arranged with the sewage discharge pipe 627. A filter cartridge 618 is threadedly connected inside the threaded groove. The filter cartridge 618 can be screwed off. An air outlet 620 is opened on the upper side wall of the water return tank 617, and the gas is discharged from the air outlet 620. The top of the water return tank 617 is open, and a cover plate 628 is rotatably connected to the top of the water return tank 617 through a shaft. The cover plate 628 is fixed to the top of the water return tank 617 by means of a bolt or a buckle. A water return pipe 619 is fixedly arranged on the lower side wall of the water return tank 617. The other end of the water return pipe 619 is fixedly arranged on the side wall of the circulating water tank 2. A check valve is fixedly arranged on the inner wall of the water return pipe 619 to control the one-way flow of the liquid from top to bottom.

[0047] Specifically, when the cylinder body two 603 closes the flow-through pipe 605, at this time, there will be some liquid remaining inside the cylinder body two 603. The gas blows the liquid and impurities into the inside of the filter cartridge 618 through the sewage discharge pipe 627 at the same time. The liquid flows out through the filter cartridge 618, while the impurities stay in the filter cartridge 618, so that the operator can remove the filter cartridge 618 to clean the impurities. The filter cartridge 618 can be disassembled by opening the cover plate 628, and when the cover plate 628 is closed, the liquid splashed out by the filter cartridge 618 can be intercepted, so that the liquid is retained in the water return tank 617, avoiding liquid splashing and causing pollution. And the liquid in the water return tank 617 flows back into the circulating water tank 2 through the water return pipe 619, thus avoiding liquid loss when cleaning impurities and reducing the waste of washing liquid.

[0048] Please refer to the appendix Figure 7 - appendix Figure 8 , the filter cartridge 618 includes an outer cylinder and an inner cylinder connected in a sliding manner. A baffle 621 is fixedly connected to the outer wall of the inner cylinder, and an extrusion column 622 is fixedly connected to the inner wall of the inner cylinder. A mounting seat 623 is fixedly connected to the inner bottom wall of the water return tank 617. A T-shaped connecting rod 624 is slidably connected to the surface of the mounting seat 623. One end of the connecting rod 624 is fixedly connected with a sealing head 625, and an elastic member 626 is sleeved on the surface of the connecting rod 624. The elastic member 626 can be a leaf spring, a helical spring, a torsion bar spring, a rubber spring, etc. In this embodiment, a helical spring is adopted.

[0049] Specifically, the baffle 621 is used to prevent liquid from splashing towards the air outlet 620. When the sealing block 609 moves outward, it pushes the inner cylinder to slide and extend through the extrusion column 622. When the inner cylinder slides outward, it drives the baffle 621 to move towards the connecting rod 624 and pushes the connecting rod 624 to move, so that the sealing head 625 blocks the return water pipe 619. Thus, when the gas flows, it prevents the gas from entering the circulation water tank 2 through the return water pipe 619. When the air flow stops, the elastic force of the elastic member 626 pushes the sealing head 625 to move and open the return water pipe 619, thereby automatically opening the return water pipe 619 to allow the washing liquid to flow downward through the return water pipe 619.

[0050] Please refer to the attached Figure 9 - attached Figure 10 , the spraying assembly 7 includes a liquid delivery pipe 71. The bottom end of the liquid delivery pipe 71 is fixedly connected to the circulation water tank 2. A water pump is fixedly arranged on the liquid delivery pipe 71, and the top end of the liquid delivery pipe 71 penetrates into the interior of the tower body 1. The top end of the liquid delivery pipe 71 is rotatably connected to a spraying pipe 72. A plurality of groups of atomizing nozzles 73 are fixedly arranged on the surface of the spraying pipe 72. Each group of atomizing nozzles 73 is cross-distributed with the packing layer 5. The bottom end of the liquid delivery pipe 71 penetrates through the packing layer 5 and the orifice plate 4 and is fixedly connected to an impeller 74. A liquid adding end with a valve is fixedly arranged on the surface of the circulation water tank 2.

[0051] Specifically, the washing liquid in the circulation water tank 2 is pumped by the water pump and enters the spraying pipe 72 through the liquid delivery pipe 71 and is sprayed out by the atomizing nozzles 73. When the tail gas enters the interior of the tower body 1 through the air inlet end 3, it pushes the impeller 74 to rotate. The impeller 74 drives the spraying pipe 72 to rotate, so that the atomizing nozzles 73 can generate an annular spraying layer, expanding the spraying area and enabling the tail gas to better combine with the washing liquid.

[0052] Please refer to the attached Figure 9 - attached Figure 10 , the spraying assembly 7 further includes a plurality of horn-shaped flow guiding covers 75. The flow guiding covers 75 are cross-distributed with the packing layer 5, and the outer wall of the flow guiding covers 75 is fixedly connected to the inner wall of the tower body 1. A spraying chamber 76 is fixedly arranged at the top end of the flow guiding covers 75.

[0053] Specifically, the flow guiding covers 75 are used to guide the tail gas to move upward from the middle of the flow guiding covers 75 into the spraying chamber 76 with a smaller diameter, and the spraying layer generated by the atomizing nozzles 73 is also located in the spraying chamber 76, making the gas-liquid two-phase contact effect between the tail gas and the washing liquid more obvious.

[0054] Please refer to the attached Figure 9 , a drain pipe 77 is fixedly connected to the outer edge of the flow guiding cover 75. The drain pipe 77 penetrates through the lower packing layer 5 and the orifice plate 4, and the bottom end of the drain pipe 77 is close to the inner bottom wall of the tower body 1, so that the bottom end of the drain pipe 77 is inserted into the washing liquid accumulated at the bottom of the tower body 1 to prevent the tail gas from flowing upward through the drain pipe 77.

[0055] Specifically, the washing liquid that falls above the fairing 75 flows into the bottom of the tower body 1 through the drain pipe 77, avoiding liquid accumulation on the fairing 75.

[0056] Please refer to the appendix Figure 10 On the outer wall of the spray pipe 72, several groups of shear blades 11 are fixedly arranged, and each group of shear blades 11 is cross-distributed with the packing layer 5.

[0057] Specifically, when the spray pipe 72 rotates to drive the shear blades 11 to rotate, when the washing liquid is sprayed downward through the atomizing nozzle 73 and drips, the shear blades 11 can shear and disperse the spray liquid, enabling the tail gas and the washing liquid to come into more sufficient contact. The atomizing nozzle 73 and the shear blades 11 can rotate without additional driving equipment, which can reduce costs, realize the multi-functional application of a single device, and achieve more functional applications with less investment in structure and equipment.

[0058] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A spray tower for an exhaust gas treatment system, comprising a tower body (1), a circulating water tank (2) fixedly disposed at the bottom of the tower body (1), an air inlet (3) fixedly disposed on the lower side wall of the tower body (1), a multi-layer perforated plate (4) fixedly disposed inside the tower body (1), a packing layer (5) fixedly disposed above the perforated plate (4), and an air outlet (8) fixedly disposed at the top of the tower body (1), characterized in that: A filter assembly (6) is fixedly arranged inside the circulating water tank (2), and the filter assembly (6) comprises an air inlet pipe (601), the top end of the air inlet pipe (601) is fixedly connected to the top end of the tower body (1), the bottom end of the air inlet pipe (601) passes through the circulating water tank (2) and is fixedly connected to a cylinder body 1 (602), the inside of the cylinder body 1 (602) is slidably connected to a cylinder body 2 (603), a water outlet (629) is provided on the lower surface of the cylinder body 2 (603), the other end of the cylinder body 2 (603) is plugged with a cylinder body 3 (604), and one end of the cylinder body 3 (604) is fixedly connected to a sewage pipe (6 27), the sewage pipe (627) passes through the circulating water tank (2), a circulation pipe (605) is fixedly arranged on the upper surface of the cylinder body (604), the top end of the circulation pipe (605) is fixedly arranged at the bottom of the tower body (1), one end of the cylinder body (603) is provided with a plurality of openings (606), and the other end of the cylinder body (603) is rotatably connected to a filter screen (607), the interior of the filter screen (607) is fixedly connected to a rotating rod (608), and the other end of the rotating rod (608) is rotatably connected to a sealing block (609), and a spray assembly (7) is installed on the tower body (1) and the circulating water tank (2).

2. The spray tower for tail gas treatment system according to claim 1, characterized in that: A solenoid valve 1 (610) is fixedly provided at the top end of the air inlet pipe (601), a one-way valve (611) is fixedly provided at the bottom end of the air inlet pipe (601), and a solenoid valve 2 is fixedly provided on the surface of the air outlet end (8).

3. The spray tower for tail gas treatment system according to claim 1, characterized in that: A raised layer (612) is fixedly arranged inside the cylinder body 1 (602), and a tension spring (613) is fixedly connected to the inner wall of the cylinder body 1 (602), and the other end of the tension spring (613) is fixedly connected to the cylinder body 2 (603).

4. The spray tower for tail gas treatment system according to claim 1, characterized in that: The surface of the rotating rod (608) is slidably connected to a rotating sleeve (614), the outer wall of the rotating sleeve (614) is fixedly connected to blades (615) distributed in an annular shape, one end of the rotating sleeve (614) is rotatably connected to a limiting frame (616), and one side of the limiting frame (616) is fixedly connected to the inner wall of the cylinder body (604).

5. The spray tower for tail gas treatment system according to claim 1, characterized in that: The filter assembly (6) further comprises a return water tank (617) and a threaded groove, wherein the return water tank (617) is fixedly mounted on the upper outer wall of the circulating water tank (2), the threaded groove is provided on the outer wall of the circulating water tank (2), and the threaded groove is coaxially arranged with a sewage pipe (627), the internal threads of the threaded groove are connected to a filter cartridge (618), and an air outlet (620) is provided on the upper wall of the return water tank (617).

6. The spray tower for tail gas treatment system according to claim 5, characterized in that: The top end of the return water tank (617) is open, and the top of the return water tank (617) is rotatably connected to a cover plate (628) via an axis. A return water pipe (619) is fixedly arranged on the lower side wall of the return water tank (617), and the other end of the return water pipe (619) is fixedly arranged on the side wall of the circulating water tank (2).

7. The spray tower for tail gas treatment system according to claim 5, characterized in that: The filter cartridge (618) comprises an outer cylinder body and an inner cylinder body which are slidably connected, the outer wall of the inner cylinder body is fixedly connected to a baffle (621), the inner wall of the inner cylinder body is fixedly connected to an extrusion column (622), the inner bottom wall of the return water tank (617) is fixedly connected to a mounting seat (623), the surface of the mounting seat (623) is slidably connected to a T-shaped connecting rod (624), one end of the connecting rod (624) is fixedly connected to a sealing head (625), and an elastic member (626) is sleeved on the surface of the connecting rod (624).

8. The spray tower for tail gas treatment system according to claim 1, characterized in that: The spray assembly (7) comprises a liquid infusion pipe (71), the bottom end of the liquid infusion pipe (71) is fixedly connected to the circulating water tank (2), a water pump is fixedly arranged on the liquid infusion pipe (71), and the top end of the liquid infusion pipe (71) penetrates into the interior of the tower body (1), the top end of the liquid infusion pipe (71) is rotatably connected to a spray pipe (72), a plurality of groups of atomizing nozzles (73) are fixedly arranged on the surface of the spray pipe (72), each group of atomizing nozzles (73) is cross-distributed with the packing layer (5), and the bottom end of the liquid infusion pipe (71) penetrates the packing layer (5) and the orifice plate (4) and is fixedly connected to an impeller (74).

9. The spray tower for tail gas treatment system according to claim 8, characterized in that: The spray assembly (7) further comprises a plurality of trumpet-shaped flow guide covers (75), the flow guide covers (75) and the packing layer (5) are cross-distributed, and the outer wall of the flow guide covers (75) is fixedly connected to the inner wall of the tower body (1), and a spray chamber (76) is fixedly provided at the top of the flow guide covers (75).

10. The spray tower for tail gas treatment system according to claim 9, characterized in that: The outer edge of the deflector cover (75) is fixedly connected with a drainage pipe (77), and the drainage pipe (77) passes through the packing layer (5) and the orifice plate (4) below.

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