Liquid sulfur dioxide preparation absorption tower

Abstract

This utility model relates to the field of sulfur dioxide technology and discloses an absorption tower for the preparation of liquid sulfur dioxide. The tower includes a tower body with a storage tank fixedly connected inside. A gas conveying assembly is installed on the inner wall of the storage tank. The gas conveying assembly includes a straight pipe that passes through and is rotatably connected to the bottom surfaces of the tower body and the storage tank. An external pipe is rotatably connected to the bottom end of the straight pipe, and a distribution pipe is fixedly connected to the top end of the straight pipe. This absorption tower for the preparation of liquid sulfur dioxide uses a motor-driven bevel gear transmission to rotate the distribution pipe and evenly distribute the waste gas in the absorption liquid. Simultaneously, a stirring plate rotates to agitate the absorption liquid, greatly enhancing the contact and mixing effect between the gas and liquid, effectively improving the absorption efficiency of sulfur dioxide in the absorption liquid. Compared with traditional absorption towers, it can more fully absorb sulfur dioxide from waste gas, improving the preparation efficiency and quality of liquid sulfur dioxide.

Description

Technical Field

[0001] This utility model relates to the field of sulfur dioxide technology, specifically to an absorption tower for preparing liquid sulfur dioxide. Background Technology

[0002] The preparation of liquid sulfur dioxide using an absorption tower generally involves first absorbing sulfur dioxide-containing waste gas with an absorbent liquid to obtain a rich solution. Then, through desorption, purification, and condensation steps, liquid sulfur dioxide is obtained. The rich solution after sulfur dioxide absorption flows out from the bottom of the absorption tower and undergoes a series of treatments to improve the concentration and purity of sulfur dioxide. Typically, an appropriate amount of sulfuric acid is added to convert sulfites or bisulfites into sulfur dioxide gas. The generated sulfur dioxide gas is desorbed from the solution, and the desorption process can be accelerated by heating or reducing pressure. The desorbed sulfur dioxide gas may contain some impurities, such as carbon dioxide and water vapor, requiring purification. Common purification methods include water washing, alkaline washing, and drying to remove impurities and obtain relatively pure sulfur dioxide gas. The purified sulfur dioxide gas is compressed by a compressor to increase its pressure and then condensed by a cooling device. Under certain pressure and temperature conditions, the sulfur dioxide gas is cooled below its boiling point, thus converting into liquid sulfur dioxide. Liquid sulfur dioxide can be stored in specialized storage tanks for subsequent use or transportation.

[0003] However, when the waste gas containing sulfur dioxide enters from the bottom of the absorption tower, and the absorbent liquid (such as sodium carbonate solution or sodium hydroxide solution) is sprayed down from the top of the absorption tower, there are gaps between the tiny droplets. A small amount of waste gas will rise directly to the top of the absorption tower without fully contacting the absorbent liquid, resulting in incomplete waste gas treatment and affecting absorption efficiency and purification effect. Utility Model Content

[0004] The purpose of this invention is to provide an absorption tower for the preparation of liquid sulfur dioxide, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an absorption tower for preparing liquid sulfur dioxide, comprising a tower body, a storage tank fixedly connected inside the tower body, a gas conveying assembly provided on the inner wall of the storage tank, the gas conveying assembly comprising a straight pipe, the straight pipe passing through and rotatably connected to the bottom surface of the tower body and the storage tank respectively, an outer pipe rotatably connected to the bottom end of the straight pipe, a diversion pipe fixedly connected to the top end of the straight pipe, an exhaust hole opened on the outer wall of the diversion pipe, and a bevel gear fixedly connected to the outer wall of the straight pipe.

[0006] Preferably, a cleaning component is provided at the bottom end of the diversion pipe. The cleaning component includes a fixing ring, which is fixedly connected to the bottom end of the diversion pipe. Two sets of symmetrically arranged through holes are opened on the surface of the fixing ring, and guide rods are slidably connected in the through holes. The bottom ends of the two sets of guide rods are fixedly connected to a fixing plate, and a scraper is fixedly connected to the bottom surface of the fixing plate.

[0007] Preferably, the fixing plate and the fixing ring are elastically connected by a return spring, and the two sets of fixing plates are fixedly connected by a connecting ring.

[0008] Preferably, a sleeve is rotatably connected to the outer surface of the diverter, and multiple arrayed notches are provided on the outer surface of the sleeve. A stirring plate is fixedly connected to the outer wall of the sleeve.

[0009] Preferably, a motor is fixedly connected to the bottom surface of the tower body, and a second bevel gear is fixedly connected to the output shaft of the motor, the second bevel gear meshing with the first bevel gear.

[0010] Preferably, a water supply pipe and a water outlet pipe are fixedly connected to both sides of the liquid storage tank, and the water supply pipe and the water outlet pipe both penetrate and extend to the outer wall of the tower body.

[0011] Preferably, the bottom surface of the tower body is fixedly connected to four sets of symmetrically arranged support legs, and the top of the tower body is fixedly connected to an exhaust pipe.

[0012] Compared with the prior art, this utility model provides an absorption tower for the preparation of liquid sulfur dioxide, which has the following beneficial effects:

[0013] 1. This absorption tower for preparing liquid sulfur dioxide uses a motor-driven bevel gear transmission to rotate the distribution pipe and evenly distribute the waste gas in the absorption liquid. At the same time, the stirring plate rotates to stir the absorption liquid, which greatly enhances the contact and mixing effect between gas and liquid, effectively improving the absorption efficiency of sulfur dioxide in the absorption liquid. Compared with traditional absorption towers, it can more fully absorb sulfur dioxide in waste gas, improving the preparation efficiency and quality of liquid sulfur dioxide.

[0014] 2. In this absorption tower for preparing liquid sulfur dioxide, when the diversion pipe rotates, the scraper can always be in close contact with the bottom of the storage tank under the action of the return spring to clean it, and promptly scrape off the impurities attached to the bottom of the storage tank and the bottom of the diversion pipe to prevent the accumulation of impurities. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 This is a schematic cross-sectional view of the present invention.

[0017] Figure 3 This is a schematic diagram of the gas delivery component structure of this utility model;

[0018] Figure 4 This is a schematic diagram of the cleaning component structure of this utility model.

[0019] In the diagram: 1. Tower body; 11. Exhaust pipe; 2. Liquid storage tank; 21. Water supply pipe; 22. Water outlet pipe; 3. Gas supply assembly; 31. Straight pipe; 32. External pipe; 33. Diverter pipe; 34. Exhaust port; 35. Sleeve; 36. Notch; 37. Stirring plate; 38. Bevel gear one; 39. Motor; 310. Bevel gear two; 4. Cleaning assembly; 41. Fixing ring; 42. Guide rod; 43. Fixing plate; 44. Scraper; 45. Return spring; 46. Connecting ring. Detailed Implementation

[0020] like Figures 1-4 As shown, this utility model provides a technical solution: an absorption tower for preparing liquid sulfur dioxide, comprising a tower body 1, with four sets of symmetrically arranged support legs fixedly connected to the bottom surface of the tower body 1, and an exhaust pipe 11 fixedly connected to the top of the tower body 1. The exhaust pipe 11 is used to discharge the gas remaining after absorption treatment, so that the purified gas can be safely discharged from the absorption tower. A liquid storage tank 2 is fixedly connected inside the tower body 1, and a water supply pipe 21 and a water outlet pipe 22 are fixedly connected to both sides of the liquid storage tank 2, respectively. The water supply pipe 21 and the water outlet pipe 22 both penetrate and extend to the outer wall of the tower body 1. The liquid storage tank 2 is used to store the absorbent liquid, providing a place for the absorption of sulfur dioxide, and at the same time, the absorbent liquid is circulated or replaced through the water supply pipe 21 and the water outlet pipe 22.

[0021] like Figures 1-4 As shown, a gas conveying assembly 3 is installed on the inner wall of the storage tank 2. The gas conveying assembly 3 includes a straight pipe 31, which passes through and is rotatably connected to the bottom surfaces of the tower body 1 and the storage tank 2. The straight pipe 31 serves as a gas conveying channel, allowing waste gas to enter the absorbent liquid in the storage tank 2 from outside the tower body 1. Its rotatable connection also provides a basis for subsequent stirring. An external pipe 32 is rotatably connected to the bottom end of the straight pipe 31, connecting to an external waste gas conveying pipeline to introduce waste gas containing sulfur dioxide into the absorption tower. A diversion pipe 33 is fixedly connected to the top end of the straight pipe 31. An exhaust port 34 is opened on the outer wall of the diversion pipe 33. The portion of the diversion pipe 33 with the exhaust port 34 is located inside the storage tank 2, diverting the waste gas conveyed from the straight pipe 31. Through the exhaust port 34 on the outer wall, the waste gas can be dispersed in the absorbent liquid in the form of small bubbles, promoting the gas-liquid mass transfer process and improving absorption efficiency.

[0022] like Figures 1-4As shown, a sleeve 35 is rotatably connected to the outer surface of the diversion pipe 33. Multiple arrayed notches 36 are opened on the outer surface of the sleeve 35. A stirring plate 37 is fixedly connected to the outer wall of the sleeve 35. A bevel gear 38 is fixedly connected to the outer wall of the straight pipe 31. A motor 39 is fixedly connected to the bottom surface of the tower body 1. A bevel gear 310 is fixedly connected to the output shaft of the motor 39. The bevel gear 310 meshes with the bevel gear 38. The output shaft of motor 39 drives bevel gear 310 to rotate, and bevel gear 38 meshing with it will rotate accordingly, thereby driving straight pipe 31 and connected diverter pipe 33 to rotate. When diverter pipe 33 rotates, exhaust holes 34 on its outer wall will evenly distribute the waste gas in the absorbent liquid. At the same time, stirring plate 37 fixed on the outer wall of sleeve 35 will also rotate synchronously with sleeve 35. Notch 36 allows waste gas to pass through sleeve 35, thereby stirring the absorbent liquid, so that the waste gas and absorbent liquid can fully contact each other, improving the absorption efficiency of sulfur dioxide in absorbent liquid.

[0023] like Figures 1-4 As shown, a cleaning component 4 is provided at the bottom end of the diversion pipe 33. The cleaning component 4 includes a fixing ring 41, which is fixedly connected to the bottom end of the diversion pipe 33. The diversion pipe 33 provides fixed support for other components of the cleaning component 4, allowing them to rotate together with the diversion pipe 33. Two sets of symmetrically arranged through holes are opened on the surface of the fixing ring 41, and guide rods 42 are slidably connected in the through holes. The bottom ends of the two sets of guide rods 42 are fixedly connected to fixing plates 43, and scrapers 44 are fixedly connected to the bottom surface of the fixing plates 43. The guide rods 42 play a guiding role, ensuring that the fixing plates 43 and scrapers 44 can move vertically up and down below the fixing ring 41, while restricting their direction of movement. The fixing plates 43 and the fixing ring 41 are elastically connected by a return spring 45, and the two sets of fixing plates 43 are fixedly connected by a connecting ring 46. The scraper 44 is connected to the bottom of the two sets of guide rods 42 by a connecting ring 46, and can move downward under the action of the return spring 45, so that the scraper 44 fits tightly against the bottom surface of the liquid storage tank 2, thereby cleaning the bottom of the liquid storage tank 2.

[0024] In this utility model, when in use, an appropriate amount of absorbent liquid is first injected into the storage tank 2 through the water supply pipe 21. Then, the waste gas containing sulfur dioxide is connected through the external pipe 32. The waste gas is dispersed into the absorbent liquid through the exhaust hole 34 on the straight pipe 31 and the diversion pipe 33.

[0025] When the motor 39 is started, the output shaft of the motor 39 drives the second bevel gear 310 to rotate. Through the meshing transmission of the first bevel gear 38, the straight pipe 31 and the diversion pipe 33 are rotated. On the one hand, the exhaust gas is more evenly distributed in the absorbent liquid. On the other hand, the stirring plate 37 on the sleeve 35 is stirred with the rotation of the sleeve 35, which enhances the gas-liquid mixing and improves the absorption efficiency of sulfur dioxide.

[0026] During the absorption process, impurities adhere to the bottom of the storage tank 2. When the diversion pipe 33 rotates, it drives the fixed ring 41 to rotate. Due to the guiding effect of the guide rod 42, the fixed plate 43 and the scraper 44 can move up and down. Under the action of the return spring 45, the scraper 44 always fits tightly with the bottom surface of the storage tank 2. As the diversion pipe 33 rotates, it cleans the bottom of the storage tank 2 and scrapes away the impurities.

[0027] After absorption is complete, the purified gas is discharged from the absorption tower through exhaust pipe 11, while the absorbent liquid that has absorbed sulfur dioxide can be discharged through water outlet pipe 22 for further treatment or recycling, depending on the situation.

[0028] The present invention has been described in detail above. However, modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, any modifications or improvements that do not depart from the spirit of the present invention are within the protection scope of the present invention.

Claims

1. A liquid sulfur dioxide production absorption tower comprising a tower body (1), characterized in that: The tower body (1) is fixedly connected to a liquid storage tank (2). A gas conveying assembly (3) is provided on the inner wall of the liquid storage tank (2). The gas conveying assembly (3) includes a straight pipe (31). The straight pipe (31) passes through and is rotatably connected to the bottom surface of the tower body (1) and the liquid storage tank (2). An external pipe (32) is rotatably connected to the bottom end of the straight pipe (31). A diversion pipe (33) is fixedly connected to the top end of the straight pipe (31). An exhaust hole (34) is opened on the outer wall of the diversion pipe (33). A bevel gear (38) is fixedly connected to the outer wall of the straight pipe (31).

2. The absorption tower for preparing liquid sulfur dioxide according to claim 1, characterized in that: The bottom end of the diversion pipe (33) is provided with a cleaning component (4). The cleaning component (4) includes a fixing ring (41). The fixing ring (41) is fixedly connected to the bottom end of the diversion pipe (33). The surface of the fixing ring (41) is provided with two sets of symmetrically arranged through holes, and a guide rod (42) is slidably connected in the through holes. The bottom ends of the two sets of guide rods (42) are fixedly connected with a fixing plate (43). The bottom surface of the fixing plate (43) is fixedly connected with a scraper (44).

3. The absorption tower for preparing liquid sulfur dioxide according to claim 2, characterized in that: The fixing plate (43) and the fixing ring (41) are elastically connected by a return spring (45), and the two sets of fixing plates (43) are fixedly connected by a connecting ring (46).

4. The absorption tower for preparing liquid sulfur dioxide according to claim 1, characterized in that: A sleeve (35) is rotatably connected to the outer surface of the diverter (33). Multiple arrayed notches (36) are opened on the outer surface of the sleeve (35). A stirring plate (37) is fixedly connected to the outer wall of the sleeve (35).

5. The absorption tower for preparing liquid sulfur dioxide according to claim 1, characterized in that: A motor (39) is fixedly connected to the bottom surface of the tower body (1), and a bevel gear (310) is fixedly connected to the output shaft of the motor (39). The bevel gear (310) meshes with the bevel gear (38).

6. The absorption tower for preparing liquid sulfur dioxide according to claim 1, characterized in that: The storage tank (2) is fixedly connected to a water supply pipe (21) and a water outlet pipe (22) on both sides, and the water supply pipe (21) and the water outlet pipe (22) both penetrate and extend to the outer wall of the tower body (1).

7. The absorption tower for preparing liquid sulfur dioxide according to claim 1, characterized in that: The bottom surface of the tower body (1) is fixedly connected with four sets of symmetrically arranged support legs, and the top of the tower body (1) is fixedly connected with an exhaust pipe (11).

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