Tail gas scrubbing purification device

Abstract

The utility model discloses a tail gas washing and purifying device relates to tail gas purification technical field, including the lower box of the open upper end and the conical lower end, be provided with a group of the purification tank of the upside triangle in the lower box, still be provided with the stirring mechanism, and the stirring mechanism can be set up and can stir the washing liquid in the purification tank to the washing liquid flow rate in the box is accelerated to make the tail gas of washing speed faster, and the washing speed is accelerated, improves the device work efficiency, simultaneously can through motor positive and negative rotation to let the stirring blade rotation in the corresponding purification tank and do not rotate in another purification tank, uses a motor to can perfect realization stirring task, and the external box body is by the lower box and with its adaptation upper box composition, when not using, can reduce the device overall height through reducing the upper box height, reduces device storage space, and when using, can let the upper box position original guarantee nozzle is at the predetermined height, and the lifting of upper box is driven completely by electric cylinder.

Description

Technical Field

[0001] This utility model relates to the field of exhaust gas purification, and in particular to an exhaust gas scrubbing and purification device. Background Technology

[0002] Calcium fluoride, also known as fluorite, is a fluorine-containing mineral. It is a naturally occurring mineral, commonly found in rocks and mineral deposits in the Earth's crust. Calcium fluoride typically exhibits various colors, including transparent, white, purple, yellow, and green, depending on the impurities present. Calcium fluoride has important industrial applications, the most well-known being its use as a flux in aluminum smelting. During the heating and reaction of calcium fluoride, a tail gas containing hydrofluoric acid is produced. If not purified and discharged, this gas can severely pollute the environment.

[0003] For example, a Chinese patent discloses a mining scrubbing tower with exhaust gas purification and emission (publication number: CN222752951U). This prior art sets up two purification tanks inside the main body of the scrubbing tower, which can take turns receiving exhaust gas. The fluorosilicic acid scrubbing liquid inside the purification tank reacts with the hydrofluoric acid in the exhaust gas to generate hexafluorosilicic acid and water, thereby achieving purification. The two purification tanks can automatically exchange liquids, effectively preventing a single purification tank from continuously reacting, causing the continuous generation of hexafluorosilicic acid and water inside the purification tank to dilute the scrubbing liquid and affect the purification effect on the exhaust gas.

[0004] However, there are still some shortcomings in the aforementioned patents and existing technologies in the market: the exhaust gas directly enters the washing liquid, and since the washing liquid itself is in the purification tank and its own flow rate is slow, the washing rate of the exhaust gas is low. In order to adapt, the exhaust gas needs to enter the purification tank at a low rate, which results in a slow purification speed of the device.

[0005] Therefore, those skilled in the art have proposed an exhaust gas scrubbing and purification device. Utility Model Content

[0006] To address the shortcomings of existing technologies, this invention provides an exhaust gas scrubbing and purification device, which solves the problems mentioned in the background section.

[0007] To achieve the above objectives, this utility model is implemented through the following technical solution: a tail gas washing and purification device, including a lower box with an open upper end and a conical lower end, wherein a set of purification boxes with a triangular upper side are arranged inside the lower box.

[0008] A stirring mechanism is also provided, which includes a set of shafts rotatably installed in the corresponding purification box. Several evenly distributed stirring blades are installed on the side of each shaft. An L-shaped plate is installed on one side of each shaft on the side of the lower box. A synchronous pulley aligned with the shaft on the same side is rotatably installed on the side of the L-shaped plate. A synchronous belt is provided on both synchronous pulleys. A one-way clutch is installed between the end of each shaft extending to the outside of the lower box and the corresponding synchronous pulley. A motor with a drive end connected to the corresponding synchronous pulley is installed on the other side of one of the L-shaped plates.

[0009] It also includes a spray system.

[0010] As a further technical solution of this utility model, when the synchronous pulley on the left rotates forward, it drives the shaft to rotate in the same direction through a one-way clutch, but it cannot drive it in reverse. When the synchronous pulley on the right rotates forward, it cannot drive the shaft to rotate in the same direction through a one-way clutch, but it can drive it in reverse.

[0011] As a further technical solution of this utility model, the upper port of the lower box is fitted with an upper box that is compatible with it and has a conical upper end. A set of electric cylinders connected to the upper box are symmetrically installed on the side of the lower box. A sealing ring that is compatible with it is installed on the upper outer port of the lower box.

[0012] As a further technical solution of this utility model, the spraying mechanism includes several horizontal pipes that are evenly installed between the inner walls of the upper box and are arranged horizontally near the upper end. The sides of the horizontal pipes are equipped with a number of evenly distributed and downward-facing nozzles. One end of all the horizontal pipes extends to the outside of the upper box and is jointly installed with a conveying pipe.

[0013] As a further technical solution of this utility model, an upward-facing exhaust pipe is installed at the upper end of the upper box, a filter screen is installed on the inner wall of the lower box near the bottom, a downward-facing sewage pipe is installed at the lower end of the lower box, and a box door is opened on the side of the lower box on the side of the filter screen.

[0014] As a further technical solution of this utility model, a three-way pipe is provided on the other side of the lower box, and the two ends of the three-way pipe extend to the bottom of the two purification boxes respectively. A solenoid valve is provided on the branch pipe of the three-way pipe extending to the purification box.

[0015] As a further technical solution of this utility model, an L-shaped input pipe extending to the outside of the lower box is installed on the upper side of the purification box, and an output end extending to the outside of the lower box is installed on the bottom of the purification box. Solenoid valves are provided on both the input pipe and the output end.

[0016] As a further technical solution of this utility model, a U-shaped tube with its port facing downward is installed on the upper side of the purification box on the side of the input pipe.

[0017] This utility model provides an exhaust gas scrubbing and purification device, which has the following advantages compared with the prior art: 1. This design provides an exhaust gas washing and purification device. The set stirring mechanism can stir the washing liquid in the purification tank, thereby accelerating the flow rate of the washing liquid in the tank. This allows for faster washing of exhaust gas, speeds up the washing process, and improves the working efficiency of the device. At the same time, the forward and reverse rotation of the motor can be used to rotate the stirring blades in one purification tank while keeping the blades in another purification tank stationary. Thus, the stirring task can be perfectly accomplished using only one motor.

[0018] 2. The exhaust gas scrubbing and purification device designed in this paper consists of an outer box composed of a lower box and a matching upper box. When not in use, the overall height of the device can be reduced by lowering the height of the upper box, thereby reducing the storage space of the device. When in use, the position of the upper box can be restored to ensure that the nozzle is at the predetermined height. At the same time, the lifting and lowering of the upper box is completely driven by an electric cylinder, which does not require manual operation by the operator and is more automated. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of a tail gas scrubbing and purification device. Figure 2 This is a schematic diagram of the storage structure of an exhaust gas scrubbing and purification device. Figure 3 This is a schematic diagram of the internal structure of a tail gas scrubbing and purification device. Figure 4 A schematic diagram of the stirring mechanism of a tail gas scrubbing and purification device; Figure 5 This is a partial structural diagram of the purification box of an exhaust gas scrubbing and purification device.

[0020] In the diagram: 1. Lower box; 2. Purification box; 3. Stirring mechanism; 301. Shaft; 302. Stirring blade; 303. L-shaped plate; 304. Motor; 305. Synchronous pulley; 306. Synchronous belt; 307. One-way clutch; 4. Upper box; 5. Electric cylinder; 6. Horizontal pipe; 7. Nozzle; 8. Conveying pipe; 9. Exhaust pipe; 10. Filter screen; 11. Sewage pipe; 12. T-shaped pipe; 13. Solenoid valve one; 14. U-shaped pipe; 15. Input pipe; 16. Output end; 17. Solenoid valve two. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0022] Please see Figure 1-5 This utility model provides a technical solution for an exhaust gas washing and purification device: it includes a lower box 1 with an open upper end and a conical lower end, and an upper box 4 with a corresponding conical upper end fitted to the upper port of the lower box 1. A set of electric cylinders 5 connected to the upper box 4 are symmetrically installed on the side of the lower box 1. A sealing ring is installed on the upper outer port of the lower box 1. After use, the two electric cylinders 5 shorten and drive the upper box 4 to descend, thereby reducing the overall height of the device and reducing its storage space. When in use, the two electric cylinders 5 extend to their longest position and drive the upper box 4 to return to its original position. The sealing ring can seal the gap between the lower box 1 and the upper box 4 to prevent the internal exhaust gas from leaking out.

[0023] like Figure 1 , Figure 3 and Figure 5 As shown, a set of purification boxes 2 with a triangular shape on the upper side are installed in the lower box 1. A three-way pipe 12 is installed on the other side of the lower box 1. The two ends of the three-way pipe 12 extend to the bottom of the two purification boxes 2 respectively. A solenoid valve 13 is installed on the branch pipe of the three-way pipe 12 extending to the purification box 2. An L-shaped input pipe 15 extending to the outside of the lower box 1 is installed on the upper side of the purification box 2. An output end 16 extending to the outside of the lower box 1 is installed at the bottom of the purification box 2. A solenoid valve 2 17 is installed on both the input pipe 15 and the output end 16. A U-shaped pipe 14 with the port facing down is installed on the upper side of the purification box 2 on the side of the input pipe 15. A level gauge is installed inside the purification tank 2 to monitor the liquid level inside the purification tank 2.

[0024] Open the solenoid valve 17 on the input pipe 15 and inject fluorosilicic acid washing liquid into the two purification tanks 2 until the predetermined liquid level is reached. Then, open the solenoid valve 13 corresponding to the left purification tank 2 and close the other solenoid valve 13 to send the exhaust gas into the three-way pipe 12. The exhaust gas then enters the fluorosilicic acid washing liquid in the corresponding purification tank 2 through the opened solenoid valve 13. The fluorosilicic acid washing liquid is used to wash the hydrofluoric acid in the exhaust gas, continuously generating hexafluorosilicic acid and water. After that, the exhaust gas is discharged from the U-shaped pipe 14 into the lower tank 1 and continues to rise.

[0025] Once the liquid level gauge in purification tank 2 detects that the liquid has accumulated to its maximum height, it means that the washing liquid is unusable. Then, close the solenoid valve 13 corresponding to the left purification tank 2 and open the solenoid valve 13 corresponding to the right purification tank 2, and start using the washing liquid in purification tank 2. Then, open the solenoid valve 17 on the output terminal 16 of the left purification tank 2 to completely drain the waste liquid in the left purification tank 2 and close it again. Then, open the solenoid valve 17 on the input pipe 15 of the left purification tank 2 and refill the left purification tank 2 with washing liquid until the predetermined height is reached.

[0026] like Figure 3 and Figure 4As shown, a stirring mechanism 3 is also provided. The stirring mechanism 3 includes a set of shafts 301 rotatably installed in the corresponding purification box 2. Several evenly distributed stirring blades 302 are installed on the side of each shaft 301. An L-shaped plate 303 is installed on one side of each shaft 301 on the side of the lower box 1. A synchronous wheel 305 aligned with the shaft 301 on the same side is rotatably installed on the side of the L-shaped plate 303. A synchronous belt 306 is provided on both synchronous wheels 305. A one-way clutch 307 is installed between the end of each shaft 301 extending to the outside of the lower box 1 and the corresponding synchronous wheel 305. A motor 304 with a drive end connected to the corresponding synchronous wheel 305 is installed on the other side of one of the L-shaped plates 303. When the left synchronous wheel 305 rotates forward, it drives the shaft 301 to rotate in the same direction through the one-way clutch 307. When it rotates in reverse, it cannot drive the shaft 301. When the right synchronous wheel 305 rotates forward, it cannot drive the shaft 301 to rotate in the same direction through the one-way clutch 307. When it rotates in reverse, it can drive the shaft 301.

[0027] like Figure 3 As shown, it also includes a spraying mechanism, which includes several horizontal pipes 6 that are evenly installed on the inner wall of the upper box 4 near the upper end and arranged laterally. Multiple evenly distributed and downward-facing nozzles 7 are installed on the side of the horizontal pipes 6. One end of all the horizontal pipes 6 extends to the outside of the upper box 4 and is connected to a conveying pipe 8. The conveying pipe 8 is connected to the water supply end in advance. Then, the condensate enters each horizontal pipe 6 through the conveying pipe 8 and is then sprayed out by the nozzles 7 to condense and wash the rising exhaust gas.

[0028] like Figure 1-3 As shown, an upward-facing exhaust pipe 9 is installed at the upper end of the upper chamber 4, a filter screen 10 is installed on the inner wall of the lower chamber 1 near the bottom, and a downward-facing drain pipe 11 is installed at the lower end of the lower chamber 1. A door is opened on the side of the lower chamber 1 on one side of the filter screen 10. The wastewater generated during washing falls freely onto the filter screen 10 and is filtered. The fixed reactants remain on the filter screen 10. After that, the falling wastewater is discharged from the drain pipe 11. After purification is completed, the upper chamber door of the lower chamber 1 can be opened to clean the fixed reactants on the filter screen 10.

[0029] An exhaust fan is installed on the side of 1 below 2. The exhaust fan can blow air into 1, thereby accelerating the rapid rise of the exhaust gas discharged from 14.

[0030] The working principle of this utility model is as follows: Open solenoid valve 17 on input pipe 15 to inject fluorosilicic acid washing solution into the two purification tanks 2 until the predetermined liquid level is reached. Then, open solenoid valve 13 corresponding to the left purification tank 2 and close the other solenoid valve 13 to send exhaust gas containing hydrofluoric acid into the three-way pipe 12. The exhaust gas then enters the fluorosilicic acid washing solution in the corresponding purification tank 2 through the opened solenoid valve 13. The fluorosilicic acid washing solution washes the hydrofluoric acid in the exhaust gas, continuously generating hexafluorosilicic acid and water. Afterward, the exhaust gas is discharged from U-shaped pipe 14 into the lower tank 1 and continues to rise, waiting... Once the liquid level gauge in purification tank 2 detects that the liquid has accumulated to its maximum height, it indicates that the washing liquid is unusable. Then, close the solenoid valve 13 corresponding to the left purification tank 2 and open the solenoid valve 13 corresponding to the right purification tank 2, and start using the washing liquid in purification tank 2. Then, open the solenoid valve 17 on the output terminal 16 of the left purification tank 2 to completely drain the waste liquid in the left purification tank 2 and close it again. Then, open the solenoid valve 17 on the input pipe 15 of the left purification tank 2 and refill the left purification tank 2 with washing liquid until the predetermined height is reached.

[0031] When the motor 304 drives the synchronous pulley 305 connected to it to rotate forward, it drives the inner shaft 301 and stirring blade 302 of the left purification tank 2 to rotate through the one-way clutch 307 on the left side. When the exhaust gas enters, it stirs the washing liquid and improves the washing effect of the washing liquid on the exhaust gas. When using the right purification tank 2, the motor 304 drives the synchronous pulley 305 connected to it to rotate in reverse. The synchronous belt 306 drives another synchronous pulley 305 to rotate in reverse. The corresponding one-way clutch 307 drives the inner shaft 301 and stirring blade 302 of the right purification tank 2 to stir the washing liquid.

[0032] Beforehand, the delivery pipe 8 is connected to the water supply end. Then, the condensate enters each horizontal pipe 6 through the delivery pipe 8 and is sprayed out by the nozzle 7 to condense and wash the rising exhaust gas. The cleaned exhaust gas is then discharged from the exhaust pipe 9. The wastewater generated during washing falls freely onto the filter screen 10 and is filtered. The fixed reactants remain on the filter screen 10. The falling wastewater is then discharged from the drain pipe 11. After purification is completed, the upper door of the lower box 1 can be opened to clean the fixed reactants on the filter screen 10.

[0033] After use, the two electric cylinders 5 shorten, causing the upper box 4 to descend. When the electric cylinders 5 are at their shortest length, the nozzle 7 is close to the upper port of the lower box 1, thereby reducing the overall height of the device and reducing its storage space. When in use, the two electric cylinders 5 are extended to their longest length, causing the upper box 4 to return to its original position.

[0034] The above description is merely a preferred embodiment of this utility model. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of this utility model, and these improvements and modifications should also be considered within the scope of protection of this utility model. Structures, devices, and operating methods not specifically described or explained in this utility model are implemented according to conventional methods in the art, unless otherwise specified or limited.

Claims

1. A tail gas scrubbing and purification device, comprising a lower chamber (1) with an open upper end and a conical lower end, wherein a set of purification chambers (2) with triangular upper sides are disposed inside the lower chamber (1), characterized in that: It also includes a spray system; A stirring mechanism (3) is also provided. The stirring mechanism (3) includes a set of shafts (301) rotatably installed in the corresponding purification box (2). Each shaft (301) has several evenly distributed stirring blades (302) installed on its side. An L-shaped plate (303) is installed on one side of each shaft (301) on the side of the lower box (1). A synchronous pulley (305) aligned with the shaft (301) on the same side is rotatably installed on the side of the L-shaped plate (303). A synchronous belt (306) is provided on both synchronous pulleys (305). A one-way clutch (307) is installed between the end of each shaft (301) extending to the outside of the lower box (1) and the corresponding synchronous pulley (305). A motor (304) with a drive end connected to the corresponding synchronous pulley (305) is installed on the other side of one of the L-shaped plates (303).

2. The exhaust gas scrubbing and purification device according to claim 1, characterized in that, When the synchronous pulley (305) on the left rotates forward, it drives the shaft (301) to rotate in the same direction through the one-way clutch (307). When it rotates in reverse, it cannot drive the shaft (301) to rotate in the same direction. When the synchronous pulley (305) on the right rotates forward, it cannot drive the shaft (301) to rotate in the same direction through the one-way clutch (307). When it rotates in reverse, it can drive the shaft (301) to rotate in the same direction.

3. The exhaust gas scrubbing and purification device according to claim 1, characterized in that, The upper port of the lower box (1) is fitted with an upper box (4) that is compatible with it and has a conical upper end. A set of electric cylinders (5) connected to the upper box (4) are symmetrically installed on the side of the lower box (1). A sealing ring compatible with it is installed on the upper outer port of the lower box (1).

4. The exhaust gas scrubbing and purification device according to claim 3, characterized in that, The spraying mechanism includes several horizontal pipes (6) that are evenly installed on the inner wall of the upper box (4) and arranged horizontally near the upper end. The side of the horizontal pipes (6) is equipped with a number of evenly distributed and downward-facing nozzles (7). One end of all the horizontal pipes (6) extends to the outside of the upper box (4) and is connected to a conveying pipe (8).

5. The exhaust gas scrubbing and purification device according to claim 4, characterized in that, The upper box (4) is equipped with an upward-facing exhaust pipe (9), the inner wall of the lower box (1) is equipped with a filter screen (10) near the bottom, the lower end of the lower box (1) is equipped with a downward-facing drain pipe (11), and a box door is opened on the side of the lower box (1) on one side of the filter screen (10).

6. The exhaust gas scrubbing and purification device according to claim 5, characterized in that, A three-way pipe (12) is provided on the other side of the lower box (1). The two ends of the three-way pipe (12) extend to the bottom of the two purification boxes (2) respectively. A solenoid valve (13) is provided on the branch pipe of the three-way pipe (12) extending to the purification box (2).

7. The exhaust gas scrubbing and purification device according to claim 6, characterized in that, An L-shaped input pipe (15) extending to the outside of the lower box (1) is installed on the upper side of the purification box (2), and an output end (16) extending to the outside of the lower box (1) is installed at the bottom of the purification box (2). Solenoid valves (17) are provided on both the input pipe (15) and the output end (16).

8. The exhaust gas scrubbing and purification device according to claim 7, characterized in that, The purification box (2) has a U-shaped tube (14) with its port facing downward installed on the upper side of the input pipe (15).

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