A purification device for acetylene production

Abstract

This utility model belongs to the technical field of acetylene production equipment, specifically disclosing a purification device for acetylene production. It includes a purification cylinder with a mounting frame at the top. A stirring motor is embedded in the mounting frame, and the output end of the stirring motor is connected to a hollow shaft. The hollow shaft is rotatably connected to the top of the purification cylinder. A stirring plate is located on the outer surface of the hollow shaft, and a nozzle is connected to the stirring plate. The nozzle is connected to the hollow shaft. A circulation mechanism is located on the outside of the purification cylinder. The input end of the circulation mechanism is connected to the bottom of the purification cylinder, and the output end is connected to the liquid inlet of a rotary joint. An absorbent filter box is installed on the circulation mechanism. This utility model, by incorporating a stirring motor, a hollow shaft, and a stirring plate, can continuously stir the absorbent liquid and acetylene gas during the purification process, effectively preventing the precipitation of sulfides and phosphides produced in the reaction from adhering to the inner wall of the purification cylinder. This reduces the frequency of regular manual cleaning, lowers maintenance costs, and improves purification efficiency.

Description

Technical Field

[0001] This utility model belongs to the technical field of acetylene production equipment, specifically a purification device for acetylene production. Background Technology

[0002] The crude acetylene gas produced by the calcium carbide process contains a variety of harmful impurities, which can lead to catalyst poisoning and equipment corrosion in subsequent synthesis reactions. Therefore, it is necessary to purify the acetylene produced by the process using purification equipment.

[0003] The existing utility model with authorization announcement number CN217855439U discloses a purification device for acetylene production, including a barrel, a purification mechanism and a drying mechanism; the barrel has legs evenly arranged at its bottom end, an air inlet pipe is provided on the outer arc surface of the barrel, the right end of the air inlet pipe penetrates and is exposed to the inside of the barrel, a distributor is provided at the lower end of the air inlet pipe, through holes are evenly arranged on the outer arc surface of the distributor, and a liquid inlet pipe is provided on the upper side of the outer arc surface of the barrel.

[0004] The above technical solution can purify acetylene using various purification methods, achieving good purification results. It also boasts high utilization of sodium hypochlorite solution, enabling drying of acetylene after purification. The operation is simple, efficient, and widely applicable. However, this technical solution suffers from drawbacks. After processing, acetylene gas contains impurities that react with the absorbent liquid, easily producing sulfide and phosphide precipitates. These precipitates gradually adhere to the inner wall of the absorption and purification device, affecting its ability to purify acetylene. Regular cleaning of the precipitate layer inside the purification device is time-consuming and labor-intensive, leading to a decrease in purification efficiency.

[0005] Therefore, we propose a purification device for acetylene production to solve the above problems. Utility Model Content

[0006] The purpose of this invention is to provide a purification device for acetylene production, so as to solve the technical problem in the prior art that it is inconvenient to clean up the precipitate generated during the purification of acetylene in the purification device.

[0007] To solve the above technical problems, the technical solution of this utility model is as follows: a purification device for acetylene production, including a purification cylinder, an inlet pipe connected to the bottom of the purification cylinder and an outlet pipe connected to the top of the purification cylinder, a mounting frame fixedly connected to the top of the purification cylinder, a stirring motor fixedly connected within the mounting frame, a rotary joint fixedly connected to the output end of the stirring motor, a hollow shaft fixedly connected to the lower end of the rotary joint, the hollow shaft being rotatably connected to the top of the purification cylinder, the lower end of the hollow shaft extending into the interior of the purification cylinder, six stirring plates arranged circumferentially at equal intervals fixedly connected to the outer surface of the hollow shaft, a plurality of nozzles arranged at equal intervals fixedly connected to the outer side of each stirring plate, the input end of the nozzles being connected to the hollow shaft through a liquid supply pipe embedded inside the stirring plate, a circulation mechanism being provided on the outer side of the purification cylinder, the input end of the circulation mechanism being connected to the bottom of the purification cylinder, the output end of the circulation mechanism being connected to the liquid inlet of the rotary joint, an absorbent filter box being installed on the circulation mechanism, and a liquid inlet being provided at the top of the purification cylinder.

[0008] Furthermore, the circulation mechanism includes a circulation pipe and a liquid pump. The liquid pump is fixedly connected to the bottom of the purification cylinder. The liquid pump is installed on the circulation pipe. The input end of the circulation pipe is fixedly connected to the bottom of the purification cylinder. The output end of the circulation pipe is fixedly connected to the liquid inlet of the rotary joint. The absorbent filter box is installed on the circulation pipe and is fixedly connected to the outer wall of the purification cylinder.

[0009] Furthermore, the output end of the stirring motor is fixedly connected to the extension shaft at the upper end of the rotary joint via a coupling, the flange at the lower end of the rotary joint is fixedly connected to the upper end of the hollow shaft, and the liquid outlet of the rotary joint is connected to the interior of the hollow shaft.

[0010] Furthermore, a drain pipe is fixedly connected to the bottom of the purification cylinder, a drain valve is installed on the drain pipe, and a sealing plug is installed on the liquid filling port.

[0011] Furthermore, a ring-shaped support frame is fixedly connected to the outer bottom of the purification cylinder.

[0012] This utility model has the following advantages compared with the prior art:

[0013] This invention, by incorporating a stirring motor, hollow shaft, and stirring plate, continuously stirs the absorbent and acetylene gas during the purification process. This effectively prevents the sulfides and phosphides produced in the reaction from precipitating and adhering to the inner wall of the purification cylinder, reducing the frequency of regular manual cleaning, lowering maintenance costs, and improving purification efficiency. Through the coordination of the circulation mechanism, absorbent filter box, and nozzles, the absorbent is recycled and filtered online. This not only improves the utilization rate of the absorbent but also removes precipitates in the absorbent in a timely manner, maintaining the activity of the absorbent. This extends the service life of the device and ensures the stability of the purification effect, avoiding the downtime for cleaning caused by sediment accumulation in traditional devices, and improving the overall efficiency of acetylene purification. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0015] Figure 2 This is a bottom view of the structure of this utility model;

[0016] Figure 3 This is a cross-sectional view of the purification cylinder of this utility model;

[0017] Figure 4 This is a schematic diagram of the structure of the stirring plate of this utility model;

[0018] Figure 5 This is a schematic diagram of the internal liquid supply pipe of the stirring plate of this utility model.

[0019] In the diagram: 1. Purification cylinder; 2. Mounting frame; 3. Stirring motor; 4. Air inlet pipe; 5. Air outlet pipe; 6. Rotary joint; 7. Hollow shaft; 8. Stirring plate; 9. Nozzle; 10. Liquid supply pipe; 11. Drain valve; 12. Drain pipe; 13. Liquid inlet; 14. Sealing plug; 15. Circulation pipe; 16. Liquid pump; 17. Annular support frame; 18. Absorption liquid filter box. Detailed Implementation

[0020] The present invention will be further described below with reference to the accompanying drawings.

[0021] like Figures 1 to 5The purification device for acetylene production shown includes a purification cylinder 1. An inlet pipe 4 is connected to the bottom of the purification cylinder 1, and an outlet pipe 5 is connected to the top. The inlet pipe 4 and outlet pipe 5 respectively deliver and discharge acetylene into and out of the purification cylinder 1. A mounting frame 2 is fixedly connected to the top of the purification cylinder 1. A stirring motor 3 is embedded and fixedly connected within the mounting frame 2. The output end of the stirring motor 3 is downward-facing, and a rotary joint 6 is fixedly connected to the output end of the stirring motor 3. A hollow shaft 7 is fixedly connected to the lower end of the rotary joint 6. The hollow shaft 7 is rotatably connected to the top of the purification cylinder 1 via a sealed bearing. The lower end of the hollow shaft 7 extends into the interior of the purification cylinder 1. Six equidistantly arranged circular stirring rods are fixedly connected to the outer surface of the hollow shaft 7 located inside the purification cylinder 1. Each stirring plate 8 has four nozzles 9 fixedly connected to its outer side at equal intervals. The input end of each nozzle 9 is connected to the hollow shaft 7 through a liquid supply pipe 10. The liquid supply pipe 10 is embedded inside the stirring plate 8. A circulation mechanism is provided on the outer side of the purification cylinder 1. The input end of the circulation mechanism is connected to the bottom of the purification cylinder 1, and the output end of the circulation mechanism is connected to the liquid inlet of the rotary joint 6. An absorbent filter box 18 is installed on the circulation mechanism. The absorbent filter box 18 contains a filter cloth for filtering the precipitate generated in the absorbent liquid. The precipitate in the absorbent liquid that has passed through the absorbent filter box 18 can be filtered and collected. A liquid inlet 13 is opened at the top of the purification cylinder 1. The liquid inlet 13 is used to add absorbent liquid into the purification cylinder 1.

[0022] To circulate the absorbent liquid within the purification cylinder 1, a circulation mechanism includes a circulation pipe 15 and a liquid pump 16. The liquid pump 16 is fixedly connected to the bottom of the purification cylinder 1 and mounted on the circulation pipe 15. The input end of the circulation pipe 15 is fixedly connected to the bottom of the purification cylinder 1, and the output end of the circulation pipe 15 is fixedly connected to the inlet of the rotary joint 6. An absorbent liquid filter box 18 is mounted on the circulation pipe 15 and fixedly connected to the outer wall of the purification cylinder 1. Under the action of the liquid pump 16, the absorbent liquid in the purification cylinder 1 is drawn out from the input end of the circulation pipe 15 at the bottom, passes through the liquid pump 16 and the absorbent liquid filter box 18 in sequence, and then enters the inlet of the rotary joint 6 from the output end of the circulation pipe 15. After passing through the rotary joint 6, it enters the hollow shaft 7, and is then conveyed by the hollow shaft 7 into each supply pipe 10. Finally, it flows out from the nozzle 9 at the output end of the supply pipe and re-enters the purification cylinder 1.

[0023] In order to allow the hollow shaft 7 to rotate while liquid enters, the rotary joint 6 is a rotary joint with an extension shaft, model MT218. The medium being transported is a chemical liquid agent. The output end of the stirring motor 3 is fixedly connected to the extension shaft at the upper end of the rotary joint 6 via a coupling. The flange at the lower end of the rotary joint 6 is fixedly connected to the upper end of the hollow shaft 7. The liquid outlet of the rotary joint 6 is connected to the interior of the hollow shaft 7.

[0024] To facilitate the discharge of waste liquid from the purification cylinder 1, a drain pipe 12 is fixedly connected to the bottom of the purification cylinder 1, and a drain valve 11 is installed on the drain pipe 12. To prevent acetylene gas from being discharged from the filling port 13 outside the purification cylinder 1, a sealing plug 14 is installed on the filling port 13.

[0025] In order to support the purification cylinder 1 and improve the stability of the device, a ring support frame 17 is fixedly connected to the outer side of the bottom of the purification cylinder 1.

[0026] The specific working process of this utility model is as follows:

[0027] First, an appropriate amount of absorbent liquid is added into the purification cylinder 1 through the liquid inlet 13, and the sealing plug 14 is installed on the liquid inlet 13 to seal it. Then, the stirring motor 3 and the liquid pump 16 are started. The stirring motor 3 drives the hollow shaft 7 and the stirring plate 8 to rotate through the rotary joint 6. At the same time, the liquid pump 16 draws the absorbent liquid from the bottom of the purification cylinder 1 through the circulation pipe 15. After being filtered by the absorbent liquid filter box 18, it is delivered to the rotary joint 6, and then sprayed out from the nozzle 9 through the hollow shaft 7 and the liquid supply pipe 10, and re-enters the purification cylinder 1.

[0028] Acetylene gas enters the bottom of the purification cylinder 1 through the inlet pipe 4. During its ascent, it comes into full contact with the absorbent liquid agitated by the rotating stirring plate 8 and the absorbent liquid sprayed from the nozzle 9. Harmful impurities (such as hydrogen sulfide and phosphine) react chemically with the absorbent liquid to form precipitates. The rotation of the stirring plate 8 prevents the precipitates from settling on the inner wall of the purification cylinder 1, allowing them to settle to the bottom with the absorbent liquid. The circulation mechanism works continuously, and the absorbent liquid is constantly filtered and recycled. The precipitates are collected in the absorbent liquid filter box 18, and the purified acetylene gas is discharged from the outlet pipe 5 to enter the next process.

[0029] When cleaning is required, stop acetylene from entering the purification cylinder 1, open the drain valve 11, and discharge the accumulated waste liquid and sediment through the drain pipe 12. Then, disassemble the absorbent filter box 18, take out the filter cloth, clean the inside of the absorbent filter box 18, replace the filter cloth with a new one, and reinstall the absorbent filter box 18 to complete the cleaning.

Claims

1. A purification device for acetylene production, comprising a purification cylinder (1), wherein the bottom of the purification cylinder (1) is connected to an inlet pipe (4) and the top is connected to an outlet pipe (5), characterized in that: A mounting bracket (2) is fixedly connected to the top of the purification cylinder (1). A stirring motor (3) is embedded and fixedly connected inside the mounting bracket (2). A rotary joint (6) is fixedly connected to the output end of the stirring motor (3). A hollow shaft (7) is fixedly connected to the lower end of the rotary joint (6). The hollow shaft (7) is rotatably connected to the top of the purification cylinder (1). The lower end of the hollow shaft (7) extends into the interior of the purification cylinder (1). Six stirring plates (8) arranged circumferentially at equal intervals are fixedly connected to the outer surface of the hollow shaft (7). Each stirring plate (8) A number of nozzles (9) are fixedly connected to the outside at equal intervals. The input end of the nozzles (9) is connected to the hollow shaft (7) through the liquid supply pipe (10). The liquid supply pipe (10) is embedded inside the stirring plate (8). A circulation mechanism is provided on the outside of the purification cylinder (1). The input end of the circulation mechanism is connected to the bottom of the purification cylinder (1). The output end of the circulation mechanism is connected to the liquid inlet of the rotary joint (6). An absorption liquid filter box (18) is installed on the circulation mechanism. A liquid inlet (13) is opened on the top of the purification cylinder (1).

2. The purification device for acetylene production according to claim 1, characterized in that: The circulation mechanism includes a circulation pipe (15) and a liquid pump (16). The liquid pump (16) is fixedly connected to the bottom of the purification cylinder (1). The liquid pump (16) is installed on the circulation pipe (15). The input end of the circulation pipe (15) is fixedly connected to the bottom of the purification cylinder (1). The output end of the circulation pipe (15) is fixedly connected to the liquid inlet of the rotary joint (6). The absorbent filter box (18) is installed on the circulation pipe (15). The absorbent filter box (18) is fixedly connected to the outer wall of the purification cylinder (1).

3. The purification device for acetylene production according to claim 1, characterized in that: The output end of the stirring motor (3) is fixedly connected to the extension shaft at the upper end of the rotary joint (6) via a coupling. The flange at the lower end of the rotary joint (6) is fixedly connected to the upper end of the hollow shaft (7). The liquid outlet of the rotary joint (6) is connected to the interior of the hollow shaft (7).

4. The purification device for acetylene production according to claim 1, characterized in that: The bottom of the purification cylinder (1) is fixedly connected to a drain pipe (12), a drain valve (11) is installed on the drain pipe (12), and a sealing plug (14) is installed on the liquid inlet (13).

5. The purification device for acetylene production according to claim 1, characterized in that: The bottom outer side of the purification cylinder (1) is fixedly connected to an annular support frame (17).

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