Hydrogen chloride gas absorption device

Abstract

The utility model relates to a hydrogen chloride gas absorption device. The hydrogen chloride gas absorption device comprises a shell, the shell is provided with an absorption area and a liquid storage area located on the lower side of the absorption area, a gas inlet pipe extending into the absorption area is arranged on the shell, the end of the gas inlet pipe is provided with a sieve hole pipe which vertically extends upwards, the upper end of the sieve hole pipe is sealed, a liquid inlet pipe is arranged at the upper end of the absorption area, and a dispersion disc is arranged at the lower end of the liquid inlet pipe. A stirring mechanism is arranged in the liquid storage area, the upper end of the absorption area is connected with the lower end of the liquid storage area through a return pipe, a circulating pump and a densimeter are arranged on the return pipe, an output pipe is arranged at the lower end of the liquid storage area, and an output pump is arranged on the output pipe. According to the hydrogen chloride gas absorption device disclosed by the utility model, the stirring mechanism is arranged in the liquid storage area, so that the homogeneity of hydrochloric acid in the liquid storage area is improved, and the concentration of hydrochloric acid solution in each position of the liquid storage area is equal. The stirring mechanism comprises a central stirring rod and two side stirring rods, so that the mixing uniformity of the hydrochloric acid solution in the liquid storage area can be improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of lithium hexafluorophosphate production equipment, and particularly relates to a hydrogen chloride gas absorption device. Background Technique

[0002] As the most widely commercialized lithium-ion battery electrolyte, lithium hexafluorophosphate has good ionic conductivity and electrochemical stability, and has become the core raw material for producing lithium-ion battery electrolytes. With the rapid development of the new energy industry, its market demand has increased sharply, and the development prospect is good.

[0003] Hydrogen chloride gas is generated during the production and preparation of lithium hexafluorophosphate. By using an absorption device to absorb the hydrogen chloride gas, the recycling of hydrogen chloride gas can be realized.

[0004] The Chinese invention patent with the application publication number of CN106731518A discloses a hydrochloric acid absorption tower. The hydrochloric acid absorption tower includes a tower body. An air inlet channel is provided at the top of the tower body. A first spraying device, a gas-liquid mixing structure and a second spraying device are sequentially arranged in the tower body from top to bottom. The first spraying device is arranged in the upper part of the tower body to evenly spray liquid on the upper part of the tower body. The gas-liquid mixing structure respectively includes a water collector and a water distributor. The water distributor is arranged below the water collector. The water distributor is frustum-shaped. The liquid collected by the water collector slides onto the water distributor. The nozzles of the second spraying device are arranged around the bottom of the water distributor. The hydrogen chloride gas is wetted by water, dissolved in water to form a hydrochloric acid solution, which drops to the bottom of the absorption tower and is discharged. Due to the instability of the water spraying and the air inlet rate, the homogeneity of the hydrochloric acid solution is poor, which is not conducive to the recycling of hydrochloric acid. Content of the Utility Model

[0005] In order to solve the above technical problems, the utility model provides a hydrogen chloride gas absorption device.

[0006] The technical solution of a hydrogen chloride gas absorption device of the utility model is as follows:

[0007] A hydrogen chloride gas absorption device includes a housing. The housing has an absorption area and a liquid storage area located below the absorption area. An air inlet pipe extending into the absorption area is provided on the housing. A sieve hole pipe extending vertically upward with a sealed upper end is provided at the end of the air inlet pipe. A liquid inlet pipe is provided at the upper end of the absorption area. A dispersion plate is provided at the lower end of the liquid inlet pipe. A stirring mechanism is provided in the liquid storage area. The upper end of the absorption area is connected to the lower end of the liquid storage area through a return pipe. A circulation pump and a densitometer are provided on the return pipe. An output pipe is provided at the lower end of the liquid storage area. An output pump is provided on the output pipe.

[0008] Furthermore, a transmission cavity is separated by a partition at the inner lower end of the liquid storage area. The stirring mechanism includes a driving motor, a central stirring rod, two side stirring rods, and a transmission mechanism. The central stirring rod is rotatably installed at the center of the partition, and the two side stirring rods are rotatably installed on the partition and symmetrically arranged with respect to the central stirring rod. The driving motor is fixedly connected to the lower end of the housing through a motor fixing seat. The driving motor drives the central stirring rod to rotate, and the transmission mechanism realizes the transmission connection between the central stirring rod and the two transmission stirring rods.

[0009] Furthermore, the transmission mechanism includes a driving sprocket, a first driven sprocket, a second driven sprocket, a first chain, and a second chain. The output shaft of the driving motor, the central shaft of the central stirring rod, and the central shafts of the two side stirring rods respectively extend into the transmission cavity. The output shaft of the driving motor is fixedly connected to the central shaft of the central stirring rod. The first driven sprocket and the second driven sprocket are respectively fixedly connected to the lower ends of the central shafts of the two side stirring rods. The first chain is wound between the driving sprocket and the first driven sprocket, and the second chain is wound between the driving sprocket and the second driven sprocket.

[0010] Furthermore, the liquid storage area includes a cylindrical section with a closed lower end, a tapered ring section with a smaller upper part and a larger lower part, and a circular ring section, which are integrally formed from bottom to top. A lower flange is provided at the upper end of the circular ring section. The absorption area includes a cylindrical section with both ends open and an arc-shaped cover, which are integrally formed from bottom to top. An upper flange is provided at the lower end of the cylindrical section. The upper flange and the lower flange are fixedly connected by a bolt assembly.

[0011] Furthermore, the inner and outer diameters of the cylindrical section are equal to the inner and outer diameters of the circular ring section.

[0012] Furthermore, an annular intermediate pipe is provided outside the upper end of the absorption area. The intermediate pipe is communicated with the reflux pipe. A plurality of spray pipes with ends extending into the absorption area are provided inside the intermediate pipe. Nozzles are provided at the ends of the spray pipes. The plurality of spray pipes are evenly spaced along the circumferential direction of the intermediate pipe.

[0013] Furthermore, a stop valve is provided on the output pipe.

[0014] The utility model provides a hydrogen chloride gas absorption device. Compared with the prior art, its beneficial effects are:

[0015] The hydrogen chloride gas absorption device of the present utility model is provided with a stirring mechanism in the liquid storage area. The stirring mechanism improves the homogeneity of hydrochloric acid in the liquid storage area, which helps to make the concentration of hydrochloric acid solution equal at each position in the liquid storage area. The stirring mechanism includes a central stirring rod and two side stirring rods, which can improve the mixing uniformity of the hydrochloric acid solution in the liquid storage area. By arranging a hole pipe at the end of the inlet pipe, the hydrogen chloride gas entering the absorption area is more dispersed, which helps the hydrogen chloride gas to be fully absorbed by water and improves the absorption effect of hydrogen chloride gas. The circulation pump pumps the hydrochloric acid solution in the liquid storage area to the absorption area and sprays it on the top of the absorption area. When the density meter detects that the density is within a certain range, the output pump pumps out the hydrochloric acid solution in the liquid storage area, which can output the hydrochloric acid concentration that meets the use requirements in time. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic structural diagram of the hydrogen chloride gas absorption device of the present utility model;

[0017] Figure 2 is Figure 1 the enlarged view of part A in

[0018] Figure 3 is Figure 1 the enlarged view of part B in

[0019] In the figure: 1, absorption area; 2, liquid storage area; 3, inlet pipe; 4, hole pipe; 5, inlet liquid pipe; 6, dispersion plate; 7, cylindrical section; 8, arc cover; 9, cylindrical section; 10, conical ring section; 11, ring section; 12, lower flange; 13, upper flange; 14, partition board; 15, central stirring rod; 16, side stirring rod; 17, drive motor; 18, motor fixing seat; 19, driving sprocket; 20, first driven sprocket; 21, second driven sprocket; 22, first chain; 23, second chain; 24, return pipe; 25, circulation pump; 26, density meter; 27, intermediate pipe; 28, spray pipe; 29, nozzle; 30, output pipe; 31, output pump; 32, stop valve. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] The following further describes the present utility model in detail in conjunction with the drawings and specific embodiments:

[0021] A specific embodiment of the hydrogen chloride gas absorption device of the present utility model is as Figures 1 to 3As shown in the figure, it includes a housing which has an absorption area 1 and a liquid storage area 2 located below the absorption area 1. An air inlet pipe 3 extending into the absorption area 1 is connected to the housing. The end of the air inlet pipe 3 is connected to a sieve hole pipe 4 extending vertically upward with a sealed upper end. A liquid inlet pipe 5 is connected to the upper end of the absorption area 1, and the lower end of the liquid inlet pipe 5 is connected to a dispersion plate 6. A stirring mechanism is connected in the liquid storage area 2. The upper end of the absorption area 1 and the lower end of the liquid storage area 2 are connected through a reflux pipe 24, and a circulation pump 25 and a densitometer 26 are connected to the reflux pipe 24. The lower end of the liquid storage area 2 is connected to an output pipe 30, and an output pump 31 and a stop valve 32 are connected to the output pipe 30.

[0022] The inner lower end of the liquid storage area 2 is separated by a partition plate 14 into a transmission cavity. The stirring mechanism includes a driving motor 17, a central stirring rod 15, two side stirring rods 16 and a transmission mechanism. The central stirring rod 15 is rotatably installed at the central position of the partition plate 14. The two side stirring rods 16 are rotatably installed on the partition plate 14 and are symmetrically arranged with respect to the central stirring rod 15. The driving motor 17 is fixedly connected to the lower end of the housing through a motor fixing seat 18. The driving motor 17 drives the central stirring rod 15 to rotate, and the transmission mechanism realizes the transmission connection between the central stirring rod 15 and the two transmission stirring rods. The transmission mechanism includes a driving sprocket 19, a first driven sprocket 20, a second driven sprocket 21, a first chain 22 and a second chain 23. The output shaft of the driving motor 17, the central axis of the central stirring rod 15 and the central axes of the two side stirring rods 16 respectively extend into the transmission cavity. The output shaft of the driving motor 17 is fixedly connected to the central axis of the central stirring rod 15. The first driven sprocket 20 and the second driven sprocket 21 are respectively fixedly connected to the lower ends of the central axes of the two side stirring rods 16. The first chain 22 is wound between the driving sprocket 19 and the first driven sprocket 20, and the second chain 23 is wound between the driving sprocket 19 and the second driven sprocket 21. An electromagnetic valve is installed on the liquid inlet pipe 5 to control the on-off of the liquid inlet pipe 5.

[0023] The liquid storage area 2 includes a cylindrical section 9 with a sealed lower end, a conical ring section 10 with a smaller upper part and a larger lower part, and a circular ring section 11 which are integrally formed from bottom to top. The upper end of the circular ring section 11 is connected with a lower flange 12. The absorption area 1 includes a cylindrical section 7 with both ends open and an arc-shaped cover 8 which are integrally formed from bottom to top. The lower end of the cylindrical section 7 is connected with an upper flange 13. The upper flange 13 and the lower flange 12 are fixedly connected through a bolt assembly. The inner and outer diameters of the cylindrical section 7 are equal to the inner and outer diameters of the circular ring section 11. An annular intermediate pipe 27 is connected to the outside of the upper end of the absorption area 1. The intermediate pipe 27 is communicated with the reflux pipe 24. A plurality of spray pipes 28 with ends extending into the absorption area 1 are connected to the inner side of the intermediate pipe 27. The ends of the spray pipes 28 are connected with nozzles 29. The plurality of spray pipes 28 are evenly spaced along the circumferential direction of the intermediate pipe 27.

[0024] The working principle of the hydrogen chloride gas absorption device of the present utility model is as follows: A certain amount of water is added into the shell through the liquid inlet pipe 5, and hydrogen chloride gas enters the shell through the gas inlet pipe 3. During this process, the circulation pump 25 is started, and the circulation pump 25 pumps the water in the liquid storage area 2 of the shell through the return pipe 24, the intermediate pipe 27 and the spray head to the top of the absorption area 1 and evenly sprays it on the top of the absorption area 1. The evenly sprayed water combines with the hydrogen chloride gas to form hydrochloric acid solution, which falls into the liquid storage area 2. The driving motor 17 is started, and the driving motor 17 drives the central stirring rod 15 to rotate. The central stirring rod 15 drives the two side stirring rods 16 to rotate through the transmission mechanism, stirring the hydrochloric acid solution in the liquid storage area 2 and improving the uniformity of the hydrochloric acid solution in the liquid storage area 2. During the process that the circulation pump 25 pumps the hydrochloric acid solution in the liquid storage area 2 to the absorption area 1, the densitometer 26 detects the density of the hydrochloric acid solution in real time. When the hydrochloric acid density is within a certain range, the output pump 31 is started, and the output pump 31 pumps out the hydrochloric acid solution in the liquid storage area 2. During this process, water is supplemented into the shell through the liquid inlet pipe 5. When the hydrochloric acid density is not within this range, the output pump 31 is closed.

[0025] The above are only the preferred embodiments of the present utility model, and are not intended to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included in the protection scope of the present utility model.

Claims

1. A hydrogen chloride gas absorption device, characterized in that, It includes a housing which has an absorption zone and a liquid storage zone located below the absorption zone. An air inlet pipe extending into the absorption zone is provided on the housing. The end of the air inlet pipe is provided with a sieve hole pipe extending vertically upward with a sealed upper end. A liquid inlet pipe is provided at the upper end of the absorption zone, and a dispersion plate is provided at the lower end of the liquid inlet pipe. A stirring mechanism is provided in the liquid storage zone. The upper end of the absorption zone is connected to the lower end of the liquid storage zone through a return pipe. A circulation pump and a densitometer are provided on the return pipe. An output pipe is provided at the lower end of the liquid storage zone, and an output pump is provided on the output pipe.

2. The hydrogen chloride gas absorption device according to claim 1, characterized in that, The inner lower end of the liquid storage zone is separated by a partition into a transmission cavity. The stirring mechanism includes a driving motor, a central stirring rod, two side stirring rods and a transmission mechanism. The central stirring rod is rotatably installed at the center of the partition. The two side stirring rods are rotatably installed on the partition and are symmetrically arranged with respect to the central stirring rod. The driving motor is fixedly connected to the lower end of the housing through a motor fixing seat. The driving motor drives the central stirring rod to rotate, and the transmission mechanism realizes the transmission connection between the central stirring rod and the two transmission stirring rods.

3. The hydrogen chloride gas absorption device according to claim 2, wherein, The transmission mechanism includes a driving sprocket, a first driven sprocket, a second driven sprocket, a first chain and a second chain. The output shaft of the driving motor, the central axis of the central stirring rod and the central axes of the two side stirring rods respectively extend into the transmission cavity. The output shaft of the driving motor is fixedly connected to the central axis of the central stirring rod. The first driven sprocket and the second driven sprocket are respectively fixedly connected to the lower ends of the central axes of the two side stirring rods. The first chain is wound between the driving sprocket and the first driven sprocket, and the second chain is wound between the driving sprocket and the second driven sprocket.

4. The hydrogen chloride gas absorption device according to claim 1, characterized in that, The liquid storage zone includes a cylindrical section with a sealed lower end, a conical ring section with a smaller upper part and a larger lower part, and a circular ring section which are integrally formed from bottom to top. A lower flange is provided at the upper end of the circular ring section. The absorption zone includes a cylindrical section with both ends open and an arc-shaped cover which are integrally formed from bottom to top. An upper flange is provided at the lower end of the cylindrical section. The upper flange and the lower flange are fixedly connected through a bolt assembly.

5. The hydrogen chloride gas absorption device according to claim 4, wherein, The inner and outer diameters of the cylindrical section are equal to the inner and outer diameters of the circular ring section.

6. The hydrogen chloride gas absorption device according to claim 1, characterized in that, [[ID= 7. The hydrogen chloride gas absorption device according to claim 1, characterized in that, ​

Images