Rectification device based on electronic-grade hydrofluoric acid distillation system

Abstract

The utility model relates to the technical field of hydrofluoric acid rectification, in particular to a rectification device based on an electronic-grade hydrofluoric acid distillation system, which comprises a base plate, a liquid storage tank and a support frame are fixedly connected to the left side and the right side of the top of the base plate respectively, and a heating tank is connected to the top of the support frame through bolts. A rectifying tank is fixedly connected to an inner cavity of the heating box, a stirring mechanism is connected to the bottom of the rectifying tank through bolts, a collecting cover is welded to the top of the rectifying tank, and electric heaters are connected to the two sides and the bottom of the inner cavity of the heating box through bolts. Hydrofluoric acid steam flows into the heat exchange pipe through the gas conveying pipe, high-temperature steam flows in the heat exchange pipe to preheat a solution in the liquid storage tank, and the heating time in the rectification tank can be shortened after the solution in the liquid storage tank is heated and enters the rectification tank, so that heat energy can be recycled, a large amount of electric energy is saved, and the energy-saving and environment-friendly effects are better.

Description

Technical Field

[0001] The utility model relates to the technical field of hydrofluoric acid distillation, in particular to a distillation device based on an electronic-grade hydrofluoric acid distillation system. Background Art

[0002] Hydrofluoric acid is an aqueous solution of hydrogen fluoride gas. It is a clear, colorless, fuming, corrosive liquid with a strong pungent odor. The hydrofluoric acid liquid enters the distillation tower and undergoes distillation operation. The resulting electronic grade hydrogen fluoride gas can be further purified after cooling.

[0003] After searching, the patent number is CN220370449U, and the name is a utility model for a distillation device for preparing electronic grade hydrofluoric acid from waste hydrofluoric acid, which includes a sleeve located on the distillation body. Through research and analysis, it is found that although the heating furnace can make the hydrofluoric acid in the kettle body heated evenly when heating the kettle body, thereby improving the efficiency of hydrofluoric acid distillation, the following defects still exist to a certain extent.

[0004] For example, it does not have a heat recovery function. After the hydrofluoric acid solution is distilled, high-temperature steam will be obtained, and then the steam will be cooled. In this way, a large amount of heat energy will be wasted in the process from high-temperature steam to cooling, which is not energy-saving and environmentally friendly. In addition, it is impossible to filter the impurities in the solution before distillation. It is difficult to clean the impurities after they enter the distillation device, and the cleaning operation is time-consuming and labor-intensive. In order to solve the above technical problems, we have designed a distillation device based on an electronic-grade hydrofluoric acid distillation system. Utility Model Content

[0005] The utility model aims to provide a distillation device based on an electronic-grade hydrofluoric acid distillation system, which has the advantages of being able to recycle and reuse heat energy, being more energy-saving and environmentally friendly, being able to pre-filter impurities in a solution, and reducing the difficulty of cleaning the inside of the distillation device, and solves the problems of being unable to recycle and reuse heat energy, being insufficiently energy-saving and environmentally friendly, being unable to pre-filter impurities in a solution, and increasing the difficulty of cleaning the inside of the distillation device.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a distillation device based on an electronic-grade hydrofluoric acid distillation system, comprising a base plate, wherein the left and right sides of the top of the base plate are respectively fixedly connected with a liquid storage box and a support frame, the top of the support frame is connected with a heating box by bolts, the inner cavity of the heating box is fixedly connected with a distillation tank, the bottom of the distillation tank is connected with a stirring mechanism by bolts, a collecting hood is welded on the top of the distillation tank, and the top of the collecting hood is welded with a gas pipe, both sides and the bottom of the inner cavity of the heating box are connected with electric heaters by bolts, the top of the left side of the heating box is connected with a filter residue mechanism by bolts, the left side of the filter residue mechanism is connected with a liquid pump, the liquid inlet pipe of the liquid pump is fixedly connected with the bottom of the rear side of the liquid storage tank, and a heat exchange pipe is fixedly connected through the inner cavity of the liquid storage tank.

[0007] Preferably, the filter residue mechanism includes a filter residue box, the inner cavity of the filter residue box is fixedly connected to a filter residue mesh plate, the bottom of the filter residue box is fixedly connected to a slag collecting bottom shell, the bottom of the slag collecting bottom shell is fixedly connected to a slag discharge valve, the right side of the filter residue box is fixedly connected to a liquid injection pipe, the right side of the liquid injection pipe passes through the inner cavity of the heating box and is connected to the distillation tank.

[0008] Preferably, the top of the filter residue box is fixedly connected with a flushing pipe, and the left side of the filter residue box is fixedly connected with a connecting pipe.

[0009] Preferably, the stirring mechanism comprises a driving motor, the output shaft of the driving motor passes through the inner cavity of the heating box and is fixedly connected to a rotating rod, the top of the rotating rod passes through the top of the inner cavity of the distillation tank and a stirring rod is fixedly sleeved on the surface.

[0010] Preferably, the top of the left side of the liquid storage tank is fixedly connected to a liquid injection valve, and the top of the liquid storage tank is fixedly connected to a liquid extraction pump.

[0011] Preferably, the top of the heat exchange tube passes through the top of the liquid storage tank and is connected to the gas pipe, the left side of the heat exchange tube passes through the left side of the liquid storage tank, and ventilation openings are provided on both the front and rear sides of the top of the inner cavity of the distillation tank.

[0012] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0013] Hydrofluoric acid vapor flows into the heat exchange tube through the gas pipe. The high-temperature steam flows in the heat exchange tube to preheat the solution in the liquid storage tank. After the solution in the liquid storage tank heats up and enters the distillation tank, the heating time in the distillation tank can be shortened. In this way, the heat energy can be recycled and reused, a large amount of electricity can be saved, and the energy-saving and environmental protection effects are better.

[0014] The liquid extraction pump draws out the solution into the filter residue box, and the filter residue mesh plate filters the impurities in the solution. The filtered solution flows into the distillation tank through the injection pipe for distillation. This can prevent a large amount of impurities from entering the distillation tank and reduce the difficulty of subsequent cleaning of the distillation tank. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is an axonometric drawing of the structure of the utility model;

[0016] Figure 2 It is a sectional isometric view of the filter residue mechanism and the heating box of the utility model;

[0017] Figure 3 It is a sectional isometric view of the heating box and the distillation tank of the utility model;

[0018] Figure 4 It is a rear axonometric view of the structure of the utility model.

[0019] In the figure: 1. base plate; 2. liquid storage tank; 3. heat exchange tube; 4. liquid injection valve; 5. liquid extraction pump; 6. filter residue mechanism; 7. gas pipeline; 8. heating box; 9. support frame; 10. flushing pipe; 11. filter residue box; 12. connecting pipe; 13. filter residue mesh plate; 14. slag collecting bottom shell; 15. slag discharge valve; 16. collecting cover; 17. distillation tank; 18. electric heater; 19. stirring mechanism; 20. ventilation opening; 21. rotating rod; 22. driving motor; 23. stirring rod; 24. liquid injection tube. DETAILED DESCRIPTION

[0020] See also Figure 1-Figure 4 A distillation device based on an electronic-grade hydrofluoric acid distillation system comprises a base plate 1, a liquid storage tank 2 and a support frame 9 are fixedly connected to the left and right sides of the top of the base plate 1, a heating box 8 is connected to the top of the support frame 9 by bolts, a distillation tank 17 is fixedly connected to the inner cavity of the heating box 8, a stirring mechanism 19 is connected to the bottom of the distillation tank 17 by bolts, a collecting hood 16 is welded to the top of the distillation tank 17, a gas transmission pipe 7 is welded to the top of the collecting hood 16, an electric heater 18 is connected to both sides and the bottom of the inner cavity of the heating box 8 by bolts, a filter residue mechanism 6 is connected to the top of the left side of the heating box 8 by bolts, a liquid pump 5 is connected to the left side of the filter residue mechanism 6, a liquid inlet pipe of the liquid pump 5 is fixedly connected to the bottom of the rear side of the liquid storage tank 2, and a heat exchange pipe 3 is fixedly connected to the inner cavity of the liquid storage tank 2;

[0021] See also Figure 2The filter residue mechanism 6 includes a filter residue box 11, the inner cavity of the filter residue box 11 is fixedly connected with a filter residue mesh plate 13, the bottom of the filter residue box 11 is fixedly connected with a slag collecting bottom shell 14, by setting the slag collecting bottom shell 14, the filtered impurities can be collected, the bottom of the slag collecting bottom shell 14 is fixedly connected with a slag discharge valve 15, by setting the slag discharge valve 15, the filtered impurities can be discharged from the filter residue box 11 after opening, the right side of the filter residue box 11 is fixedly connected with an injection pipe 24, the right side of the injection pipe 24 passes through the inner cavity of the heating box 8 and is connected with the distillation tank 17;

[0022] See also Figure 2 The top of the filter residue box 11 is fixedly connected with a flushing pipe 10. By setting the flushing pipe 10, it can be connected with an external water pipeline so that the flushing water can backwash the filter residue mesh plate 13 to remove impurities attached to the bottom of the filter residue mesh plate 13. The left side of the filter residue box 11 is fixedly connected with a connecting pipe 12;

[0023] See also Figure 3 The stirring mechanism 19 includes a driving motor 22, the output shaft of the driving motor 22 penetrates the inner cavity of the heating box 8 and is fixedly connected to a rotating rod 21, the top of the rotating rod 21 penetrates the top of the inner cavity of the distillation tank 17 and a stirring rod 23 is fixedly sleeved on the surface. By setting the stirring mechanism 19, the driving motor 22 can be controlled to drive the stirring rod 23 on the surface of the rotating rod 21 to rotate to stir the heated solution, so that the solution is heated more evenly and the heating efficiency is improved;

[0024] See also Figure 1 The top of the left side of the liquid storage tank 2 is fixedly connected with a liquid injection valve 4. By setting the liquid injection valve 4, it is convenient to add solution into the liquid storage tank 2. The top of the liquid storage tank 2 is fixedly connected to the liquid pump 5;

[0025] See also Figure 1 and Figure 3 The top of the heat exchange tube 3 passes through the top of the liquid storage tank 2 and is connected to the gas pipe 7. The left side of the heat exchange tube 3 passes through the left side of the liquid storage tank 2. Ventilation openings 20 are provided on both the front and rear sides of the top of the inner cavity of the distillation tank 17. By setting the ventilation openings 20, the steam in the distillation tank 17 can flow out.

[0026] When in use, the device is connected to an external power supply and a controller to control the liquid pump 5 to pump out the solution in the liquid storage tank 2 and enter the filter residue box 11. The internal filter residue mesh plate 13 filters the impurities in the solution and filters the impurities on the lower surface of the filter residue mesh plate 13. The filtered solution flows into the distillation tank 17 through the injection pipe 24 for distillation, which can prevent a large amount of impurities from entering the distillation tank 17 and reduce the difficulty of subsequent cleaning of the distillation tank 17. The electric heaters 18 on both sides and the bottom of the heating box 8 are controlled to heat the solution in the distillation tank 17. As the temperature of the solution rises, high-temperature hydrofluoric acid vapor is formed. Under the action of air pressure, the vapor flows into the heat exchange tube 3 through the gas pipe 7. The high-temperature vapor preheats the solution in the liquid storage tank 2 during the flow in the heat exchange tube 3. After the solution in the liquid storage tank 2 heats up and enters the distillation tank 17, the heating time in the distillation tank 17 can be shortened. In this way, the heat energy can be recycled and reused, a large amount of electric energy can be saved, and the energy-saving and environmental protection effect is better.

[0027] In summary: the distillation device based on the electronic grade hydrofluoric acid distillation system, through the coordinated use of the liquid storage tank 2, the heat exchange tube 3, the liquid pump 5, the filter residue mechanism 6, the gas pipeline 7, the heating box 8, the distillation tank 17, the electric heater 18 and the stirring mechanism 19, solves the problems of being unable to recycle and reuse heat energy, being insufficient in energy conservation and environmental protection, being unable to pre-filter impurities in the solution, and increasing the difficulty of cleaning the inside of the distillation device.

Claims

1. A distillation device based on an electronic grade hydrofluoric acid distillation system, comprising a base plate (1), characterized in that: The left and right sides of the top of the base plate (1) are respectively fixedly connected to a liquid storage box (2) and a support frame (9); the top of the support frame (9) is connected to a heating box (8) by bolts; the inner cavity of the heating box (8) is fixedly connected to a distillation tank (17); the bottom of the distillation tank (17) is connected to a stirring mechanism (19) by bolts; a collecting hood (16) is welded to the top of the distillation tank (17); the top of the collecting hood (16) is welded to a gas transmission pipe (7); both sides and the bottom of the inner cavity of the heating box (8) are connected to electric heaters (18) by bolts; the top of the left side of the heating box (8) is connected to a filter residue mechanism (6) by bolts; the left side of the filter residue mechanism (6) is connected to a liquid pump (5); the liquid inlet pipe of the liquid pump (5) is fixedly connected to the bottom of the rear side of the liquid storage box (2); and a heat exchange pipe (3) is fixedly connected to the inner cavity of the liquid storage box (2).

2. A distillation device based on an electronic grade hydrofluoric acid distillation system according to claim 1, characterized in that: The filter residue mechanism (6) comprises a filter residue box (11), the inner cavity of the filter residue box (11) is fixedly connected to a filter residue mesh plate (13), the bottom of the filter residue box (11) is fixedly connected to a slag collecting bottom shell (14), the bottom of the slag collecting bottom shell (14) is fixedly connected to a slag discharge valve (15), the right side of the filter residue box (11) is fixedly connected to a liquid injection pipe (24), and the right side of the liquid injection pipe (24) passes through the inner cavity of the heating box (8) and is connected to the distillation tank (17).

3. A distillation device based on an electronic grade hydrofluoric acid distillation system according to claim 2, characterized in that: The top of the filter residue box (11) is fixedly connected to a flushing pipe (10), and the left side of the filter residue box (11) is fixedly connected to a connecting pipe (12).

4. A distillation device based on an electronic grade hydrofluoric acid distillation system according to claim 1, characterized in that: The stirring mechanism (19) comprises a driving motor (22), the output shaft of the driving motor (22) passing through the inner cavity of the heating box (8) and being fixedly connected to a rotating rod (21), the top of the rotating rod (21) passing through the top of the inner cavity of the distillation tank (17) and having a stirring rod (23) fixedly sleeved on its surface.

5. A distillation device based on an electronic grade hydrofluoric acid distillation system according to claim 1, characterized in that: The top of the left side of the liquid storage tank (2) is fixedly connected to a liquid injection valve (4), and the top of the liquid storage tank (2) is fixedly connected to a liquid extraction pump (5).

6. A distillation device based on an electronic grade hydrofluoric acid distillation system according to claim 1, characterized in that: The top of the heat exchange tube (3) penetrates to the top of the liquid storage tank (2) and is connected to the gas transmission pipe (7), the left side of the heat exchange tube (3) penetrates to the left side of the liquid storage tank (2), and ventilation openings (20) are provided on both the front and rear sides of the top of the inner cavity of the distillation tank (17).

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