Environment-friendly acid mist desulfurization and denitrification tower

Abstract

The utility model discloses an environment-friendly acid mist desulfurization and denitrification tower, which relates to the technical field of waste gas treatment and comprises a tower body, a water tank is fixedly arranged in the tower body, a buffer tray is slidably arranged in the tower body, and a plurality of spray heads are fixedly arranged at the bottom of the buffer tray; two first one-way valves are fixedly arranged at the bottom in the telescopic water bag, and two second one-way valves are fixedly arranged at the top in the telescopic water bag; the concentration of harmful substances in acid mist gas is increased through downward movement of the buffer disc, the telescopic water bag is extruded to accelerate spraying of the absorption liquid, and the absorption liquid and the harmful substances are fully combined and neutralized, so that the desulfurization efficiency is improved, automatic gas inlet is realized, and the absorption liquid is automatically supplemented into the buffer disc; and gas which is subjected to desulfurization and denitration in the buffer tank can be automatically sucked onto the partition plate through the lifting of the placing box, and the gas penetrates through the SCR catalyst to realize denitration and automatic discharge.

Description

Technical Field

[0001] This utility model relates to the field of waste gas treatment technology, specifically to an environmentally friendly acid mist desulfurization and denitrification tower. Background Technology

[0002] Acid mist desulfurization and denitrification is a technology that purifies acid mist gas containing acidic substances (such as sulfur dioxide and nitrogen oxides) generated during industrial production processes in order to reduce pollutant emissions and protect the environment. Its main targets are sulfur dioxide and nitrogen oxides in acid mist, and it is commonly used in the power, steel and chemical industries.

[0003] For example, the patent with announcement number CN113713568B, entitled "A Method and Apparatus for Desulfurization and Denitrification of Sintering Flue Gas", includes a conveyor that is assembled to transport activated coke adsorbent particles inside the cylinder, so that the activated coke adsorbent particles can fall from top to bottom and then be transported to the top again to fall; a scraper is used to scrape the activated coke adsorbent particles transported by the conveyor, so that the activated coke particles can fall evenly from the cylinder cover; a permeable plate is used to screen and isolate the falling activated coke adsorbent particles and let them enter the conveyor; and an exhaust recirculation unit is used to recirculate the sintering flue gas input into the cylinder for multiple treatments before it meets the standards and to discharge it after it meets the standards.

[0004] When treating acid mist for desulfurization and denitrification, there are methods such as dry separation and wet separation. Wet separation involves neutralizing and absorbing harmful substances in the acid mist with an absorbent liquid. However, since substances such as sulfur dioxide in the acid mist float in the mist, the activated carbon in the aforementioned patent is mostly granular. As the activated carbon falls from top to bottom at a fast speed, it cannot fully contact the sulfur dioxide in the flue gas, thus affecting the purification effect. Utility Model Content

[0005] The purpose of this invention is to provide an environmentally friendly acid mist desulfurization and denitrification tower to address the aforementioned shortcomings in the existing technology.

[0006] To achieve the above objectives, this utility model provides the following technical solution: an environmentally friendly acid mist desulfurization and denitrification tower, comprising a tower body, a water tank fixedly disposed within the tower body, a buffer plate slidably disposed within the tower body, and a plurality of spray heads fixedly disposed at the bottom of the buffer plate; a telescopic airbag fixedly disposed between the buffer plate and the water tank, and a telescopic waterbag also fixedly disposed between the buffer plate and the water tank, with two first one-way valves fixedly disposed at the bottom of the telescopic waterbag and two second one-way valves fixedly disposed at the top of the telescopic waterbag; and a pressing mechanism comprising a rotating rod rotatably disposed within the tower body, a placement box threadedly connected to the rotating rod, two connecting rods fixedly disposed between the placement box and the buffer plate, and the rotating rod slidably connected to the buffer plate.

[0007] Preferably, an air inlet pipe is fixedly installed on the tower body, the air inlet pipe is fixedly connected to the telescopic airbag, and a second check valve is fixedly installed inside the air inlet pipe.

[0008] Preferably, a partition is fixedly installed inside the tower, a breathable mesh is fixedly installed on the bottom wall of the placement box, and a catalyst is fixedly installed inside the placement box.

[0009] Preferably, the placement box is fixedly provided with two fixing frames, and a sealing ball is slidably disposed in each fixing frame. The top wall of the placement box is provided with a vent hole that is adapted to the sealing ball.

[0010] Preferably, the inner wall of the tower body is provided with a first sliding groove, a pressure plate is fixedly provided on the periphery of the buffer tray, the pressure plate slides in the first sliding groove, and an exhaust mechanism is fixedly provided on the inner wall of the tower body.

[0011] Preferably, the exhaust mechanism includes an exhaust pipe, a sealing plate is slidably disposed on the inner wall of the tower body, two springs are fixedly disposed between the sealing plate and the tower body, a second sliding groove is provided on both sides of the first sliding groove, a slider is slidably disposed between the two second sliding grooves, and two pull ropes are fixedly disposed between the slider and the sealing plate.

[0012] Preferably, a buffer tank is fixedly installed on the outer wall of the tower body, a lifting plate is slidably installed inside the buffer tank, a telescopic pipe is fixedly installed on the lifting plate, a flow pipe is fixedly connected to the end of the telescopic pipe away from the lifting plate, the flow pipe is fixedly connected to the tower body, a first check valve is fixedly installed at the end of the flow pipe away from the lifting plate, and the exhaust pipe is fixedly connected to the buffer tank.

[0013] In the above technical solution, this utility model provides an environmentally friendly acid mist desulfurization and denitrification tower, which has the following beneficial effects: by moving the buffer plate downward, the concentration of harmful substances in the acid mist gas increases, and the compression of the telescopic water bag accelerates the spraying of the absorbent liquid, so that the absorbent liquid and harmful substances are fully combined and neutralized, thereby improving the desulfurization efficiency, and realizing automatic air intake and automatic replenishment of absorbent liquid into the buffer plate. By raising and lowering the placement box, the gas that has completed desulfurization and is waiting to be denitrified in the buffer tank can be automatically drawn into the baffle plate, and then passed through the SCR catalyst to achieve denitrification and automatic discharge. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.

[0015] Figure 1 A schematic diagram of the overall structure provided for an embodiment of this utility model;

[0016] Figure 2 This is a schematic diagram of the structure of the telescopic airbag provided in an embodiment of the present utility model;

[0017] Figure 3 A schematic diagram of the structure of the pressure plate provided in an embodiment of this utility model;

[0018] Figure 4 This is a schematic diagram of the structure of the sealing plate provided in an embodiment of the present utility model;

[0019] Figure 5 Provided for the embodiments of this utility model Figure 3 Enlarged view of the structure at point A in the middle.

[0020] Explanation of reference numerals in the attached figures:

[0021] 1. Tower body; 2. Servo motor; 3. Air inlet pipe; 4. Buffer tank; 5. Lifting plate; 6. Telescopic pipe; 7. Flow pipe; 8. First check valve; 9. Second check valve; 10. Water tank; 11. Telescopic air bag; 12. Buffer plate; 13. Rotating rod; 131. Threaded groove; 14. Telescopic water bag; 15. First one-way valve; 16. Second one-way valve; 17. Spray head; 18. Partition plate; 19. Connecting rod; 20. Placement box; 21. Ventilation net; 22. Catalyst; 23. Fixing frame; 24. Sealing ball; 25. Vent hole; 26. Sleeve; 31. Exhaust pipe; 32. Sealing plate; 33. Spring; 34. Slider; 35. Pull rope; 36. First slide groove; 37. Second slide groove; 38. Pressure plate. Detailed Implementation

[0022] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0023] Please see Figure 1-5An environmentally friendly acid mist desulfurization and denitrification tower, the technical solution proposed in this utility model includes a tower body 1, a water tank 10 fixedly installed inside the tower body 1, a buffer plate 12 slidably installed inside the tower body 1, and several spray heads 17 fixedly installed at the bottom of the buffer plate 12; a telescopic airbag 11, which is fixedly installed between the buffer plate 12 and the water tank 10, and a telescopic waterbag 14 is also fixedly installed between the buffer plate 12 and the water tank 10, with two first one-way valves 15 fixedly installed at the bottom of the telescopic waterbag 14 and two second one-way valves 16 fixedly installed at the top of the telescopic waterbag 14; a pressing mechanism, including a rotating rod 13 rotatably installed inside the tower body 1, a placement box 20 threadedly connected to the rotating rod 13, two connecting rods 19 fixedly installed between the placement box 20 and the buffer plate 12, and the rotating rod 13 slidably connected to the buffer plate 12;A water tank 10 is fixedly installed at the bottom of the tower body 1 to hold the absorbent liquid for purifying acid mist. A buffer tray 12 slides up and down on the inner wall of the tower body 1, with the buffer tray 12 positioned above the water tank 10. A spray head 17 is located on the bottom wall of the buffer tray 12 and communicates with it. A telescopic airbag 11 is used to hold the acid mist to be treated. The buffer tray 12 contains absorbent liquid, which is discharged from above the acid mist through the spray head 17, combining with the acidic harmful substances in the acid mist to purify it. A telescopic waterbag 14 is located inside the telescopic airbag 11, with its lower part fixedly connected to the bottom of the water tank 10 and its upper part fixedly connected to the bottom wall of the buffer tray 12. The first one-way valve 15 ensures that the absorbent liquid in the water hammer can only enter the telescopic water bladder 14, and the second one-way valve 16 ensures that the absorbent liquid in the telescopic water bladder 14 can only enter the buffer tray 12. The bottom of the rotating rod 13 is rotatably connected to the bottom of the telescopic water bladder 14, and the rotating rod 13 slides through the buffer tray 12, creating a sliding seal. The placement box 20 is slidably connected to the inner wall of the tower body 1, and a sleeve 26 is fixedly installed inside the placement box 20. A threaded groove 131 is opened on the upper side of the rotating rod 13, and the sleeve 26 is threadedly connected to the rotating rod 13 through the threaded groove 131. In the initial state, the telescopic water bladder 14 is filled with absorbent liquid. When in use, the acid mist to be treated is filled into the telescopic water bladder 14. In the telescopic airbag 11, the rotating rod 13 moves the placement box 20 downwards via the sleeve 26. As the placement box 20 moves downwards, it drives the buffer plate 12 downwards via the connecting rod 19. The downward movement of the buffer plate 12 compresses the acid mist in the telescopic airbag 11 and compresses the telescopic water bag 14, causing the absorbent liquid inside to enter the buffer plate 12 through the two second one-way valves 16. At this time, the acid mist in the telescopic airbag 11 is gradually compressed, increasing the concentration of harmful substances. As the amount of absorbent liquid in the buffer plate 12 increases, its internal pressure also increases, thus increasing the speed at which the absorbent liquid is sprayed from the spray head 17. This allows the absorbent liquid to fully and quickly interact with the harmful substances in the acid mist. The combination of substances increases purification efficiency. When the buffer tray 12 moves down to the designated position, the compressed acid mist gas in the telescopic airbag 11 is discharged. At this time, the reverse rotating rod 13 is reversed, causing the placement box 20 to move the buffer tray 12 upward. The upward movement of the buffer tray 12 creates a negative pressure inside the telescopic airbag 11, thereby absorbing the acid mist gas to be treated into the telescopic airbag 11. As the buffer tray 12 rises, the telescopic water bag 14 is also stretched, and a negative pressure also appears inside it. The bottom of the telescopic water bag 14 is in the absorbent liquid of the water bag, thereby absorbing the absorbent liquid in the water tank 10 into the telescopic water bag 14 for the next use, so that the absorbent liquid in the water bag can be recycled.

[0024] Specifically, an air inlet pipe 3 is fixedly installed on the tower body 1, and the air inlet pipe 3 is fixedly connected to the telescopic air bag 11. A second check valve 9 is fixedly installed inside the air inlet pipe 3. The air inlet pipe 3 passes through the tower body 1 and is fixedly connected to the bottom of the telescopic air bag 11. The second check valve 9 allows acid mist gas to enter the telescopic air bag 11 from the air inlet pipe 3, but prevents it from flowing out of the telescopic air bag 11. The air inlet pipe 3 is used to introduce acid mist gas into the telescopic air bag 11. When the telescopic air bag 11 is compressed, the acid mist gas is compressed. When the gas inside the telescopic air bag 11 is discharged and it extends, a negative pressure is generated inside. The untreated acid mist gas is drawn into the telescopic air bag 11 through the second check valve 9, realizing automatic air intake.

[0025] Specifically, a partition 18 is fixedly installed inside the tower body 1, a permeable mesh 21 is fixedly installed on the bottom wall of the placement box 20, and a catalyst 22 is fixedly installed inside the placement box 20. The absorbent is used for desulfurization to remove acidic components from the acid mist gas. The catalyst 22 is an SCR catalyst 22 used for denitrification. The bottom wall of the placement box 20 is a permeable mesh 21. When the rotating rod 13 is rotated, the sleeve 26 is moved up and down through the threaded groove 131, thereby moving the placement box 20 up and down. The desulfurized acid mist gas discharged from the telescopic air bag 11 enters between the partition 18 and the placement box 20. When the placement box 20 moves down, the gas passes through the permeable mesh 21 and enters the SCR catalyst 22, thereby completing the denitrification. The denitrified gas is discharged from the top of the placement box 20. An outlet is opened on the top wall of the tower body 1 (not shown in the figure). When the placement box 20 moves up, the desulfurized and denitrified gas above the placement box 20 is squeezed out from the outlet, completing the gas discharge.

[0026] Specifically, two fixing brackets 23 are fixedly installed on the placement box 20, and a sealing ball 24 is slidably installed in each fixing bracket 23. The top wall of the placement box 20 has a vent hole 25 adapted to the sealing ball 24. The lower wall of the placement box 20 is a breathable mesh 21. The SCR catalyst 22 is placed in the placement box 20. When the placement box 20 moves downward, the gas between the partition 18 and the placement box 20 is squeezed into the SCR catalyst 22 and gathers towards the vent hole 25. As the gas moves, the sealing ball 24 is lifted up, and the gas passing through the SCR catalyst 22 flows from the vent to the top of the placement box 20. When the placement box 20 moves down to the partition 18, the reverse rotating rod 13 moves the placement box 20 up. At this time, the sealing ball 24 blocks the vent 25 by gravity. During the upward movement of the placement box 20, a negative pressure is generated between the placement box 20 and the partition 18, and the gas above the placement box 20 that has completed denitrification through the SCR catalyst 22 is pushed up by the placement box 20 and discharged from the outlet.

[0027] Specifically, a first sliding groove 36 is provided on the inner wall of the tower body 1, and a pressure plate 38 is fixedly installed on the periphery of the buffer tray 12. The pressure plate 38 slides in the first sliding groove 36, and an exhaust mechanism is fixedly installed on the inner wall of the tower body 1. The buffer tray 12 and the rotating rod 13 slide and seal below. When the placement box 20 moves the buffer tray 12 down through the two connecting rods 19, the pressure plate 38 slides down in the first sliding groove 36. When the pressure plate 38 moves down to a position close to the water tank 10, the exhaust mechanism is triggered and the exhaust mechanism is opened. At this time, the gas that has been compressed by the buffer tray 12 and desulfurized by the absorbent sprayed on the buffer tray 12 is discharged from the exhaust mechanism to the space between the partition plate 18 and the placement box 20, waiting for the catalyst 22 on the placement box 20 to denitrate the desulfurized gas.

[0028] Specifically, the exhaust mechanism includes an exhaust pipe 31, a sealing plate 32 slidably mounted on the inner wall of the tower body 1, two springs 33 fixedly mounted between the sealing plate 32 and the tower body 1, second sliding grooves 37 opening on both sides of the first sliding groove 36, a slider 34 slidably mounted between the two second sliding grooves 37, and two pull ropes 35 fixedly mounted between the slider 34 and the sealing plate 32; the exhaust pipe 31 is located at the end of the tower body 1 near the water tank 10, and a portion of the exhaust pipe 31 inside the tower body 1 is fixedly connected to the telescopic airbag 11; the inner wall of the tower body 1 has a groove for the sealing plate 32 to slide up and down, and the exhaust pipe 31 is divided into two parts by the groove. In the initial state, the sealing plate 32 is in the middle of the exhaust pipe 31, blocking the exhaust pipe 31, and the slider 34 slides on both sides in the corresponding second sliding grooves 37, such as... Figure 4 As shown, the groove is connected to the first slide groove 36. One end of the pull rope 35 is fixedly connected to the sealing plate 32, and the other end passes around the connection between the groove and the first slide groove 36 and is fixedly connected to the slider 34. When the pressure plate 38 moves down to the slider 34, it abuts against the slider 34. The pressure plate 38 continues to move down, and the slider 34 moves down accordingly. The sealing plate 32 is lifted by the pull rope 35. At this time, the exhaust pipe 31 is connected, and the gas compressed in the telescopic airbag 11 is discharged from the exhaust pipe 31. When the buffer plate 12 moves up, the telescopic airbag 11 extends. After the pressure plate 38 moves up a certain distance, the sealing plate 32 moves down again under the action of the spring 33 to block the exhaust pipe 31. At this time, a negative pressure appears in the telescopic airbag 11, and the unpurified acid mist gas enters the telescopic airbag 11 from the air inlet pipe 3, thereby realizing automatic air intake and exhaust.

[0029] Specifically, a buffer tank 4 is fixedly installed on the outer wall of the tower body 1. A lifting plate 5 is slidably installed inside the buffer tank 4. A telescopic pipe 6 is fixedly installed on the lifting plate 5. A flow pipe 7 is fixedly connected to the end of the telescopic pipe 6 away from the lifting plate 5. The flow pipe 7 is fixedly connected to the tower body 1. A first check valve 8 is fixedly installed at the end of the flow pipe 7 away from the lifting plate 5. An exhaust pipe 31 is fixedly connected to the buffer tank 4. The exhaust pipe 31 is fixedly connected to the bottom of the buffer tank 4. The buffer tank 4 and the bottom of the telescopic airbag 11 are connected together through the exhaust tank. The lifting plate 5 and the buffer tank 4 are slidably sealed. The bottom of the telescopic pipe 6 passes through the lifting plate 5 and is connected to the inside of the buffer tank 4. The flow pipe 7 is located at... The first check valve 8, positioned slightly above the partition 18, ensures that gas in the buffer tank 4 can only enter between the partition 18 and the placement box 20. When the sealing plate 32 moves upward and opens the exhaust pipe 31, the compressed gas in the telescopic airbag 11 enters the buffer tank 4. At this time, the lifting plate 5 moves upward. When the placement box 20 moves the buffer tray 12 upward, a negative pressure is formed between the placement box 20 and the partition 18. The desulfurized gas in the buffer tank 4 enters between the partition 18 and the placement box 20 through the telescopic pipe 6 and the transfer pipe 7, thus completing the automatic gas intake. At this time, the lifting plate 5 moves downward. A servo motor 2 is fixedly installed at the top of the tower body 1, which drives the rotating rod. 13. Reverse rotation: During use, the servo motor 2 drives the rotating rod 13 to rotate forward. At this time, the placement box 20 and the buffer plate 12 move downward, and the acid mist gas in the telescopic airbag 11 is compressed, increasing the concentration of harmful substances such as sulfur dioxide. The absorbent liquid in the telescopic water bag 14 is squeezed into the buffer plate 12 and sprayed out at an accelerated speed, thus fully combining with the substances in the acid mist and improving the desulfurization efficiency. Meanwhile, the gas that has completed desulfurization in the partition plate 18 and placement box 20 also passes through the SCR catalyst 22 and is discharged from the top of the placement box 20. When the buffer plate 12 moves downward, pressing the slider 34 downward, the sealing plate 32 rises and opens the exhaust pipe 31. At this time, the gas in the telescopic airbag 11 is... The gas is squeezed into the buffer tank 4, the lifting plate 5 rises, and then the servo motor 2 drives the rotating rod 13 to reverse. At this time, the placement box 20 and the buffer plate 12 move upward. The gas that has completed denitrification above the placement box 20 is discharged from the tower body 1. The telescopic air bag 11 pull rope 35 to create negative pressure, so that the acid mist gas to be treated is sucked into the telescopic air bag 11 through the air inlet pipe 3. When the buffer plate 12 moves upward, the telescopic water bag 14 also pulls rope 35, so that the absorbent in the water tank 10 is sucked into the telescopic water bag 14. When the placement box 20 moves upward, a negative pressure is generated between it and the partition plate 18, which sucks the gas in the buffer tank 4 into the space between the partition plate 18 and the placement box 20, thereby realizing the automatic flow of gas.

[0030] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An environmentally friendly acid mist desulfurization and denitrification tower, comprising a tower body (1), characterized in that, A water tank (10) is fixedly installed inside the tower body (1), and a buffer plate (12) is slidably installed inside the tower body (1). Several spray heads (17) are fixedly installed at the bottom of the buffer plate (12). A telescopic airbag (11) is fixedly installed between a buffer plate (12) and a water tank (10). A telescopic water bag (14) is also fixedly installed between the buffer plate (12) and the water tank (10). Two first one-way valves (15) are fixedly installed at the bottom of the telescopic water bag (14), and two second one-way valves (16) are fixedly installed at the top of the telescopic water bag (14). The pressing mechanism includes a rotating rod (13) rotatably disposed inside the tower body (1), a placement box (20) is threadedly connected to the rotating rod (13), two connecting rods (19) are fixedly disposed between the placement box (20) and the buffer plate (12), and the rotating rod (13) is slidably connected to the buffer plate (12).

2. The environmentally friendly acid mist desulfurization and denitrification tower according to claim 1, characterized in that, An air inlet pipe (3) is fixedly installed on the tower body (1). The air inlet pipe (3) is fixedly connected to the telescopic airbag (11). A second check valve (9) is fixedly installed inside the air inlet pipe (3).

3. The environmentally friendly acid mist desulfurization and denitrification tower according to claim 2, characterized in that, A partition (18) is fixedly installed inside the tower body (1), a breathable mesh (21) is fixedly installed on the bottom wall of the placement box (20), and a catalyst (22) is fixedly installed inside the placement box (20).

4. The environmentally friendly acid mist desulfurization and denitrification tower according to claim 3, characterized in that, Two fixed brackets (23) are fixedly installed on the placement box (20), and a sealing ball (24) is slidably installed in each fixed bracket (23). A ventilation hole (25) adapted to the sealing ball (24) is opened on the top wall of the placement box (20).

5. The environmentally friendly acid mist desulfurization and denitrification tower according to claim 4, characterized in that, The inner wall of the tower body (1) is provided with a first sliding groove (36), and a pressure plate (38) is fixedly provided on the periphery of the buffer plate (12). The pressure plate (38) slides in the first sliding groove (36), and an exhaust mechanism is fixedly provided on the inner wall of the tower body (1).

6. The environmentally friendly acid mist desulfurization and denitrification tower according to claim 5, characterized in that, The exhaust mechanism includes an exhaust pipe (31), a sealing plate (32) is slidably provided on the inner wall of the tower body (1), two springs (33) are fixedly provided between the sealing plate (32) and the tower body (1), a second slide groove (37) is provided on both sides of the first slide groove (36), a slider (34) is slidably provided between the two second slide grooves (37), and two pull ropes (35) are fixedly provided between the slider (34) and the sealing plate (32).

7. The environmentally friendly acid mist desulfurization and denitrification tower according to claim 6, characterized in that, A buffer tank (4) is fixedly installed on the outer wall of the tower body (1). A lifting plate (5) is slidably installed inside the buffer tank (4). A telescopic pipe (6) is fixedly installed on the lifting plate (5). A flow pipe (7) is fixedly connected to the end of the telescopic pipe (6) away from the lifting plate (5). The flow pipe (7) is fixedly connected to the tower body (1). A first check valve (8) is fixedly installed at the end of the flow pipe (7) away from the lifting plate (5). The exhaust pipe (31) is fixedly connected to the buffer tank (4).

Images