An ultra-clean, high-purity, electronic-grade hydrofluoric acid high-efficiency purification device

Abstract

The utility model discloses an ultra-clean high-purity electronic-grade hydrofluoric acid efficient purification device, comprising a distillation tower, a condensation box fixedly installed on the top of the distillation tower, a cavity opened inside the condensation box, an inflation tube installed on the top shell wall of the condensation box, the inflation tubes are evenly distributed on the top outer wall of the condensation box and are connected with the inside of the condensation box, an air bag is arranged on the top of the inflation tube, the air bag is connected with the inflation tube, the air bag is in a flat state in the initial state, a folding hose is connected between every two air bags, and the folding hose is connected with the air bag. With the increase of the amount of hydrogen fluoride gas in the condensation box, the hydrogen fluoride gas enters the air bag and gradually inflates the air bag. The gas will automatically flow to other air bags with less gas through the folding hose, balancing the air pressure in each air bag, and producing a pressure relief buffer effect. Moreover, the air bag changes from flat to full, which can remind the staff that there is too much high-purity hydrogen fluoride gas in the condensation box and collect it in time.

Description

Technical Field

[0001] The utility model relates to the technical field of hydrofluoric acid, in particular to an ultra-clean high-purity electronic-grade hydrofluoric acid high-efficiency purification device. Background Art

[0002] Hydrofluoric acid is an aqueous solution of hydrogen fluoride gas, a clear, colorless, fuming, corrosive liquid. In the industrial preparation of hydrogen fluoride, calcium fluoride and concentrated sulfuric acid are usually used to react to generate hydrogen fluoride gas.

[0003] The final product of the existing hydrofluoric acid purification technology is high-purity hydrogen fluoride gas. The hydrofluoric acid purification is carried out in a distillation tower. When hydrogen fluoride gas is continuously generated, the gas pressure in the distillation tower becomes higher and higher. If the gas pressure in the distillation tower is not relieved and buffered, the reliability of the distillation tower during operation is poor. Utility Model Content

[0004] In order to overcome the shortcomings of the prior art, the utility model provides an ultra-clean high-purity electronic-grade hydrofluoric acid high-efficiency purification device. As the amount of hydrogen fluoride gas in the condensation box increases, the hydrogen fluoride gas enters the airbag and gradually inflates the airbag. Through the arranged folding hose, the gas will automatically flow to other airbags with less gas, balancing the air pressure in each airbag, thereby producing a pressure relief buffer effect. In addition, the airbag changes from flat to full, which can remind the staff that there is too much high-purity hydrogen fluoride gas in the condensation box and collect it in time.

[0005] In order to solve the above technical problems, the utility model provides the following technical solutions: an ultra-clean high-purity electronic grade hydrofluoric acid high-efficiency purification device, comprising a distillation tower, a condenser box is fixedly installed on the top of the distillation tower, a cavity is opened inside the condenser box, an inflation tube is installed on the top shell wall of the condenser box, the inflation tubes are equidistantly distributed on the top outer wall of the condenser box, and are connected with the inside of the condenser box, an air bag is arranged on the top of the inflation tube, the air bag is connected with the inflation tube, the air bag is in a flat state in the initial state, a folding hose is connected between every two air bags, and the folding hose is connected with the air bag;

[0006] Furthermore, springs are bonded to both sides of the outer surface of the bottom end of the airbag, and the other ends of the springs are bonded to the top outer wall of the condensation box. The springs are distributed on both sides of the inflation tube, and the number is at least two.

[0007] As a preferred technical solution of the utility model, a mounting frame is fixedly installed in the middle of the outer wall of the bottom end of the distillation tower, a servo motor is installed on the mounting frame, a stirring roller is fixedly connected to the output end of the servo motor, the stirring roller runs through the interior of the distillation tower and is connected to the bearing on the inner wall of the top end of the distillation tower, and stirring rods are fixedly connected to the outer surface of the stirring roller at equal intervals;

[0008] Furthermore, fixed sleeves are fixedly provided at equal intervals on the outer surface of the stirring roller, and stirring rods are evenly and vertically distributed along the circumferential direction on the outer surface of each fixed sleeve.

[0009] As a preferred technical solution of the utility model, a plurality of condensing plates are fixedly connected to both sides of the inner wall of the condensing box, each of the condensing plates is provided with an installation groove, a condensing tube is installed in each of the installation grooves, both ends of each of the condensing tubes penetrate the two side walls of the condensing box and extend outward, and the two ends of the condensing tubes are respectively converged on a fixed tube, and the fixed tube is connected to an external water tank;

[0010] Furthermore, a sponge pad is arranged above the condensation plate, and the sponge pad is horizontally fixed between the inner walls on both sides of the condensation box;

[0011] Furthermore, the shape and size of the sponge pad are compatible with the shape and size of the cavity of the condensation box;

[0012] Furthermore, a plurality of connecting pipes are provided between the top of the distillation tower and the condenser, and the connecting pipes are evenly distributed along the circumferential direction;

[0013] Furthermore, both ends of the connecting pipe are connected to the distillation tower and the condenser respectively, and each connecting pipe is provided with a one-way valve;

[0014] Furthermore, the inflation tube is arranged above the sponge pad, and the space between the sponge pad and the inner wall of the top end of the condensation box is connected with the inflation tube;

[0015] Furthermore, the structure, working principle and beneficial effects of the condensation plate and the condensation tube are all referred to the details recorded in the patent document with publication number CN216629696U.

[0016] Compared with the prior art, the utility model can achieve the following beneficial effects:

[0017] When the device is in use, through the provided inflation tube, air bag and folding hose, as the amount of hydrogen fluoride gas in the condensation box increases, the hydrogen fluoride gas enters the air bag through the inflation tube, and gradually inflates the air bag to prop it up, and the gas will automatically flow to other air bags with less gas through the provided folding hose to balance the gas pressure in each air bag, which can produce a pressure relief buffer effect for the rising hydrogen fluoride gas, and the air bag changes from flat to full, which can remind the staff that there is too much high-purity hydrogen fluoride gas in the condensation box and collect it in time. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the structure of the utility model;

[0019] Figure 2 For this utility model Figure 1 Enlarged view of point A in the middle;

[0020] Figure 3 This is a schematic diagram of the connecting pipe structure of the utility model;

[0021] Figure 4 This is a schematic diagram of the structure of the stirring rod of the utility model;

[0022] Figure 5 This is the front view of the utility model;

[0023] Among them: 1. Distillation tower; 2. Condensation box; 3. Mounting frame; 4. Servo motor; 5. Stirring roller; 6. Fixed sleeve; 7. Stirring rod; 8. Connecting pipe; 9. Condensation pipe; 10. Condensation plate; 11. Sponge pad; 12. Inflatable pipe; 13. Air bag; 14. Folding hose; 15. Spring. DETAILED DESCRIPTION

[0024] In order to make the technical means, creative features, purpose and efficacy of the utility model easy to understand, the utility model is further described below in conjunction with specific embodiments, but the following embodiments are only preferred embodiments of the utility model, not all. Based on the embodiments in the implementation mode, other embodiments obtained by those skilled in the art without creative work are all within the scope of protection of the utility model. The experimental methods in the following embodiments are conventional methods unless otherwise specified, and the materials, reagents, etc. used in the following embodiments are all commercially available unless otherwise specified.

[0025] Example

[0026] like Figure 1 , Figure 2 , Figure 5 As shown, the utility model provides an ultra-clean high-purity electronic-grade hydrofluoric acid efficient purification device, comprising a distillation tower 1, a condensation box 2 is fixedly installed on the top of the distillation tower 1, a cavity is opened inside the condensation box 2, an air-filling tube 12 is installed on the top shell wall of the condensation box 2, the air-filling tube 12 is evenly distributed on the top outer wall of the condensation box 2, and is communicated with the inside of the condensation box 2, an air bag 13 is arranged on the top of the air-filling tube 12, the air bag 13 is communicated with the air bag 12, the air bag 13 is in a flat state in the initial state, a folding hose 14 is connected between every two of the air bags 13, the folding hose 14 is communicated with the air bag 13, springs 15 are bonded on both sides of the outer surface of the bottom end of the air bag 13, the other end of the spring 15 is bonded to the top outer wall of the condensation box 2, and the springs 15 are distributed on both sides of the air-filling tube 12, and the number is at least two;

[0027] When using the device, water vapor condenses into liquid in the condensation box 2, and the hydrogen fluoride gas passes through the sponge pad 11. The sponge pad 11 absorbs the remaining water in the hydrogen fluoride. As the amount of hydrogen fluoride gas in the condensation box 2 increases, the hydrogen fluoride gas enters the airbag 13 through the inflation tube 12, and gradually inflates the airbag 13 to prop up the airbag 13. Since the inflation speed of each airbag 13 is different, when there is more gas in one or more of the airbags 13, the gas will automatically flow to other airbags 13 with less gas through the folding hose 14 connected between the two airbags 13, so as to balance the air pressure in each airbag 13. The spring 15 can be set to limit the airbag 13 to prevent it from detaching. When the airbag 13 is deformed during inflation, the spring 15 will also deform accordingly. , to adapt to the changes of the airbag 13. When the device is in use, through the provided inflation tube 12, the airbag 13 and the folding hose 14, as the amount of hydrogen fluoride gas in the condensation box 2 increases, the hydrogen fluoride gas enters the airbag 13 through the inflation tube 12, and gradually inflates the airbag 13 to prop up the airbag 13. Since the inflation speed of each airbag 13 is different, when there is more gas in one or more of the airbags 13, the gas will automatically flow to other airbags 13 with less gas through the folding hose 14 connected between the two airbags 13, balancing the air pressure in each airbag 13, which can produce a pressure relief buffer effect on the rising hydrogen fluoride gas, and the airbag 13 from flat to full can remind the staff that there is too much high-purity hydrogen fluoride gas in the condensation box 2 and collect it in time.

[0028] like Figure 1 , Figure 4 , Figure 5 As shown, a mounting frame 3 is fixedly installed at the middle of the outer wall of the bottom end of the distillation tower 1, and a servo motor 4 is installed on the mounting frame 3. A stirring roller 5 is fixedly connected to the output end of the servo motor 4. The stirring roller 5 runs through the interior of the distillation tower 1 and is connected to the bearing of the inner wall of the top end of the distillation tower 1. Fixed sleeves 6 are fixedly provided at equal intervals on the outer surface of the stirring roller 5, and stirring rods 7 are evenly and vertically distributed along the circumferential direction on the outer surface of each fixed sleeve 6;

[0029] When the device is used, hydrofluoric acid is an aqueous solution of hydrogen fluoride. When hydrogen fluoride is prepared industrially, calcium fluoride and concentrated sulfuric acid are usually used to react to generate hydrogen fluoride gas. The servo motor 4 is started, and the servo motor 4 drives the stirring roller 5 to rotate. The stirring roller 5 drives the stirring rod 7 installed thereon to rotate. The stirring rod 7 stirs the mixture of calcium fluoride and concentrated sulfuric acid, which can increase the contact area between calcium fluoride and concentrated sulfuric acid and accelerate the reaction speed between the two.

[0030] like Figure 1 , Figure 3As shown, a plurality of condensing plates 10 are fixedly connected to both sides of the inner wall of the condensing box 2, and a mounting groove is provided in each of the condensing plates 10, and a condensing tube 9 is installed in each of the mounting grooves, and both ends of each of the condensing tubes 9 penetrate the two side walls of the condensing box 2 and extend outward, and the two ends of the condensing tubes 9 are respectively converged to a fixed tube, and the fixed tube is connected to the external water tank, and a plurality of connecting tubes 8 are arranged between the top of the distillation tower 1 and the condensing box 2, and the connecting tubes 8 are evenly distributed along the circumferential direction, and the two ends of the connecting tubes 8 are respectively connected to the distillation tower 1 and the condensing box 2, and each of the connecting tubes 8 is provided with a one-way valve;

[0031] Hydrofluoric acid is an aqueous solution of hydrogen fluoride. When hydrogen fluoride is prepared industrially, calcium fluoride and concentrated sulfuric acid are usually used to react to generate hydrogen fluoride gas. The generated hydrogen fluoride gas and part of the water vapor enter the condenser 2 together. The temperature of the external water tank connected to the condenser 9 is 50°C. The fixed pipe is opened, and water flows from the water tank into the fixed pipe and then into the condenser 9. The hydrogen fluoride gas enters the condenser 2 from the distillation tower 1 through the connecting pipe 8. Since the boiling point of hydrogen fluoride gas is about 20°C, the water vapor entering the condenser 2 will condense into liquid at 50°C, while the hydrogen fluoride gas will remain in the gaseous state, thereby separating water from the hydrogen fluoride gas.

[0032] like Figure 1 As shown, a sponge pad 11 is arranged above the condensation plate 10, and the sponge pad 11 is horizontally fixed between the inner walls of both sides of the condensation box 2. The shape and size of the sponge pad 11 are adapted to the shape and size of the cavity of the condensation box 2. The inflation tube 12 is arranged above the sponge pad 11, and the space between the sponge pad 11 and the inner wall of the top end of the condensation box 2 is connected with the inflation tube 12.

[0033] Hydrofluoric acid is an aqueous solution of hydrogen fluoride. When hydrogen fluoride is prepared industrially, calcium fluoride and concentrated sulfuric acid are usually used to react to generate hydrogen fluoride gas. The generated hydrogen fluoride gas and part of the water vapor enter the condenser 2 together. The temperature of the external water tank connected to the condenser 9 is 50°C. Since the boiling point of hydrogen fluoride gas is about 20°C, the water vapor entering the condenser 2 will condense into liquid under the environment of 50°C, while the hydrogen fluoride gas remains in the gas state. The hydrogen fluoride gas passes through the sponge pad 11 upward, and the sponge pad 11 can absorb moisture and take away the remaining moisture in the hydrogen fluoride gas, so that the collected hydrogen fluoride gas has a higher purity, and the purity of the hydrofluoric acid finally produced is also high.

[0034] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An ultra-clean high-purity electronic grade hydrofluoric acid high-efficiency purification device, comprising a distillation tower (1), characterized in that: A condenser box (2) is fixedly installed on the top of the distillation tower (1), and a cavity is provided inside the condenser box (2). An air filling pipe (12) installed on the top shell wall of the condensation box (2), wherein the air filling pipe (12) is evenly distributed on the top outer wall of the condensation box (2) and is connected to the inside of the condensation box (2); An airbag (13) is arranged at the top end of the inflation tube (12), the airbag (13) is connected to the inflation tube (12), and the airbag (13) is in a flat state in an initial state; A folded hose (14) is connected between every two air bags (13), and the folded hose (14) is communicated with the air bags (13).

2. The ultra-clean high-purity electronic-grade hydrofluoric acid efficient purification device according to claim 1, characterized in that: Springs (15) are bonded to both sides of the outer surface of the bottom end of the airbag (13), and the other end of the spring (15) is bonded to the top outer wall of the condensation box (2). The springs (15) are distributed on both sides of the inflation tube (12), and the number is at least two.

3. The ultra-clean high-purity electronic grade hydrofluoric acid efficient purification device according to claim 1, characterized in that: A mounting frame (3) is fixedly mounted on the middle of the outer wall at the bottom end of the distillation tower (1); a servo motor (4) is mounted on the mounting frame (3); an output end of the servo motor (4) is fixedly connected to a stirring roller (5); the stirring roller (5) passes through the interior of the distillation tower (1) and is connected to a bearing on the inner wall of the top end of the distillation tower (1); and stirring rods (7) are fixedly connected to the outer surface of the stirring roller (5) at equal intervals.

4. The ultra-clean high-purity electronic-grade hydrofluoric acid efficient purification device according to claim 3, characterized in that: Fixed sleeves (6) are fixedly arranged at equal intervals on the outer surface of the stirring roller (5), and stirring rods (7) are evenly and vertically distributed along the circumferential direction on the outer surface of each fixed sleeve (6).

5. The ultra-clean high-purity electronic-grade hydrofluoric acid efficient purification device according to claim 1, characterized in that: A plurality of condensation plates (10) are fixedly connected to both sides of the inner wall of the condensation box (2), each of the condensation plates (10) is provided with an installation groove, each of the installation grooves is provided with a condensation tube (9), both ends of each of the condensation tubes (9) penetrate through both side walls of the condensation box (2) and extend outward, and the two ends of the condensation tubes (9) are respectively converged on a fixed tube, and the fixed tube is connected to an external water tank.

6. The ultra-clean high-purity electronic grade hydrofluoric acid efficient purification device according to claim 5, characterized in that: A sponge pad (11) is arranged above the condensation plate (10) at intervals, and the sponge pad (11) is horizontally fixed between the inner walls on both sides of the condensation box (2).

7. The ultra-clean high-purity electronic grade hydrofluoric acid efficient purification device according to claim 6, characterized in that: The shape and size of the sponge pad (11) are compatible with the shape and size of the cavity of the condensation box (2).

8. The ultra-clean high-purity electronic-grade hydrofluoric acid efficient purification device according to claim 1, characterized in that: A plurality of connecting pipes (8) are arranged between the top of the distillation tower (1) and the condenser (2), and the connecting pipes (8) are evenly distributed along the circumferential direction.

9. The ultra-clean high-purity electronic grade hydrofluoric acid efficient purification device according to claim 8, characterized in that: The two ends of the connecting pipe (8) are respectively connected to the distillation tower (1) and the condenser (2), and each connecting pipe (8) is provided with a one-way valve.

10. The ultra-clean high-purity electronic-grade hydrofluoric acid high-efficiency purification device according to claim 6, characterized in that: The inflation tube (12) is arranged above the sponge pad (11), and the space between the sponge pad (11) and the inner wall of the top end of the condensation box (2) is connected to the inflation tube (12).

Images