Anhydrous hydrofluoric acid distillation tower

Abstract

The utility model discloses an anhydrous hydrofluoric acid distillation tower, comprising a filter cartridge, a distillation tank, a distillation tower and a blower. The distillation tower is provided with a first condensation chamber, a second condensation chamber and a third condensation chamber from top to bottom in sequence. The first condensation chamber, the second condensation chamber and the third condensation chamber are provided with condensation pipes and orifice pipes inside. The top of the distillation tank is provided with an upper air pipe, and the upper air pipe is connected to the first condensation chamber, the second condensation chamber and the third condensation chamber respectively through a plurality of shunt pipes. A filter cartridge is provided on one side of the distillation tank, and the filter cartridge is connected to the distillation tank through a guide pipe. The utility model is provided with a filter cartridge, and a filter element is provided inside the filter cartridge, through which the filter element can be adsorbed and purified, impurities can be removed, and the effect of distillation can be improved. A fixing frame is provided on the outside of the distillation tank, and a hoop frame is provided on one side of the fixing frame, and the hoop frame is convenient for installing and fixing the filter cartridge.

Description

Technical Field

[0001] The utility model relates to the field of distillation towers, in particular to an anhydrous hydrofluoric acid distillation tower. Background Art

[0002] The hydrofluoric acid distillation tower is used to distill hydrofluoric acid. Distillation is a separation process that uses the different volatilities of the components in a mixture to separate them. Commonly used equipment includes plate distillation towers and packed distillation towers. Hydrofluoric acid is an aqueous solution of hydrogen fluoride gas. It is a clear, colorless, fuming, corrosive liquid [1] with a strong pungent odor. It is easily soluble in water and ethanol and slightly soluble in ether. Hydrofluoric acid is a weak acid with extremely strong corrosiveness. It can strongly corrode metals, glass and silicon-containing objects. It is generally prepared in the laboratory using fluorite (the main component is calcium fluoride) and concentrated sulfuric acid. It needs to be sealed in a plastic bottle.

[0003] For example, the authorized patent with publication number CN217220232U (hydrofluoric acid distillation and degassing device): includes a crude distillation tower, a vacuum degassing tower, and a distillation tower. The crude distillation tower is connected to the vacuum degassing tower through a first delivery pipeline. A vacuum pump is fixedly installed on the vacuum degassing tower. The vacuum pump is connected to a first condenser through a first gas delivery pipeline. A second condenser is connected to the bottom of the distillation tower through a pipeline. The first condenser is connected to the distillation tower through a pipeline. The second condenser is connected to a mixing kettle through a second delivery pipeline. A flow regulating valve is installed on the second delivery pipeline. The pure water generated during the operation of the vacuum degassing tower is effectively recycled and utilized, thereby improving the purity of the finished hydrofluoric acid solution. While distilling and degassing the hydrofluoric acid, the liquid hydrofluoric acid and the pure water are mixed, which facilitates the preparation of hydrofluoric acid solutions with different concentrations that meet the factory requirements. The concentration adjustment is more convenient, and the operation is safer and more convenient.

[0004] The above-mentioned prior art separation process has a slow collection efficiency for hydrofluoric acid, low separation efficiency, and the condensation and liquefaction process cannot be layered and processed multiple times, the purification is not thorough enough, and the collected distilled hydrofluoric acid cannot be layered and collected. Impurities exist in the solution during the introduction process, and the purification is not thorough enough. Utility Model Content

[0005] The utility model aims to provide an anhydrous hydrofluoric acid distillation tower to solve the problems proposed in the above-mentioned background technology that the separation process for hydrofluoric acid is slow to collect, the separation efficiency is low, the condensation and liquefaction process cannot be layered for multiple treatments, the purification is not thorough enough, and the collected distilled hydrofluoric acid cannot be layered and collected, impurities exist in the solution during the introduction process, and the purification is not thorough enough.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an anhydrous hydrofluoric acid distillation tower, comprising a filter cartridge, a distillation tank, a distillation tower and a fan, wherein the interior of the distillation tower is provided with a first condensation chamber, a second condensation chamber and a third condensation chamber from top to bottom in sequence, and the interiors of the first condensation chamber, the second condensation chamber and the third condensation chamber are all provided with condensation pipes and orifice pipes, an upper air pipe is provided on the top of the distillation tank, and the upper air pipe is respectively connected to the first condensation chamber, the second condensation chamber and the third condensation chamber through a plurality of branch pipes, a filter cartridge is provided on one side of the distillation tank, and the filter cartridge is connected to the distillation tank through a guide pipe.

[0007] In a further embodiment, the first condensation chamber, the second condensation chamber and the third condensation chamber are connected via a liquid collection layer, and a second liquid drain head is provided at one end of the liquid collection layer.

[0008] In a further embodiment, a first liquid drain head is provided in the middle of the bottom end of the distillation tower, and air-permeable drainage holes are provided on both sides of the liquid collecting layer.

[0009] In a further embodiment, the top of the distillation tower is connected to a fan via an air duct, the fan is connected to an exhaust pipe, and the air duct and the distillation tower are embedded via a connector.

[0010] In a further embodiment, a fixing frame is provided in the middle of the distillation tank, a hoop frame is provided on one side of the fixing frame, and the hoop frame is clamped tightly on the outside of the filter cartridge.

[0011] In a further embodiment, an activated carbon adsorption filter element is provided inside the filter cartridge, a heating coil is provided inside the distillation tank, and control valves are provided on the guide pipe and the diversion pipe.

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

[0013] The utility model is provided with a filter cartridge, wherein a filter element is arranged inside the filter cartridge, through which the filter element can be adsorbed and purified, impurities can be removed, and the distillation effect can be improved. A fixing frame is arranged on the outside of the distillation tank, and a hoop frame is arranged on one side of the fixing frame, through which the filter cartridge can be installed and fixed conveniently.

[0014] The utility model is provided with a first condensation chamber, a second condensation chamber and a third condensation chamber on the distillation tower, and an upper air pipe is provided on the top of the distillation tank, and the upper air pipe is connected with the first condensation chamber, the second condensation chamber and the third condensation chamber respectively through three branch pipes, so that multiple chambers can be condensed simultaneously, and the condensation efficiency is low. A liquid collection layer is provided between the first condensation chamber, the second condensation chamber and the third condensation chamber, and a second liquid discharge head is provided on one side of the liquid collection layer for convenient liquid discharge. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1This is a schematic structural diagram of an anhydrous hydrofluoric acid distillation tower of the utility model;

[0016] Figure 2 It is a structural schematic diagram of the distillation tower of the utility model;

[0017] Figure 3 This is a schematic diagram of the structure of the distillation tank of the utility model;

[0018] Figure 4 This is a front view of the exhaust pipe of the utility model;

[0019] Figure 5 It is a top view of the fixing frame and the hoop frame of the utility model.

[0020] In the figure: 1. upper air pipe; 2. branch pipe; 3. hoop frame; 4. filter cartridge; 5. guide pipe; 6. control valve; 7. distillation tank; 8. fixed frame; 9. first liquid discharge head; 10. distillation tower; 11. second liquid discharge head; 12. air guide pipe; 13. fan; 14. exhaust pipe; 15. connector; 16. orifice pipe; 17. first condensation chamber; 18. liquid collecting layer; 19. second condensation chamber; 20. third condensation chamber; 21. heating coil. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0022] See also Figure 1-5 The utility model provides an embodiment: an anhydrous hydrofluoric acid distillation tower, comprising a filter cartridge 4, a distillation tank 7, a distillation tower 10 and a fan 13. The interior of the distillation tower 10 is provided with a first condensation chamber 17, a second condensation chamber 19 and a third condensation chamber 20 from top to bottom. The interiors of the first condensation chamber 17, the second condensation chamber 19 and the third condensation chamber 20 are provided with condensation pipes and orifice pipes 16. The top of the distillation tank 7 is provided with an upper air pipe 1, which is respectively connected to the first condensation chamber 17, the second condensation chamber 19 and the third condensation chamber 20 through a plurality of branch pipes 2. A filter cartridge 4 is provided on one side of the distillation tank 7, and the filter cartridge 4 is connected to the distillation tank 7 through a guide pipe 5. The first condensation chamber 17, the second condensation chamber 19 and the third condensation chamber 20 are used for multi-chamber condensation processing, the upper air pipe 1 is used to discharge the rectified air, and the filter cartridge 4 is used to remove dust, adsorb and purify the introduced liquid. The first condensation chamber 17 , the second condensation chamber 19 and the third condensation chamber 20 are connected via a liquid collection layer 18 . A second liquid discharge head 11 is provided at one end of the liquid collection layer 18 , and the liquid collection layer 18 is used to collect the condensed and liquefied hydrofluoric acid.

[0023] A first liquid drain head 9 is provided at the middle of the bottom end of the distillation tower 10, and air permeable drain holes are provided on both sides of the liquid collecting layer 18, and the collected hydrofluoric acid after distillation is discharged through the first liquid drain head 9. The top of the distillation tower 10 is connected to the fan 13 through the air guide pipe 12, and the fan 13 is connected to the exhaust pipe 14, and the air guide pipe 12 and the distillation tower 10 are embedded through the connector 15, and the fan 13 is convenient for exhaust.

[0024] A fixing frame 8 is provided in the middle of the distillation tank 7, and a hoop frame 3 is provided on one side of the fixing frame 8. The hoop frame 3 is clamped on the outside of the filter cartridge 4, and the filter cartridge 4 is conveniently clamped and fixed by the fixing frame 8 and the hoop frame 3 on the outside thereof. An activated carbon adsorption filter element is provided inside the filter cartridge 4, a heating coil 21 is provided inside the distillation tank 7, and control valves 6 are provided on the guide pipe 5 and the diversion pipe 2, and the activated carbon adsorption filter element is used to remove dust, adsorb and purify the hydrofluoric acid liquid.

[0025] Working principle: When in use, hydrofluoric acid is added into the filter cartridge 4, and the filter element in the filter cartridge 4 is used for adsorption purification and filtration. After adsorption purification, it is introduced into the distillation tank 7 through the guide tube 5, and evaporated through the heating coil 21 in the distillation tank 7. The hydrofluoric acid vapor is gasified from the upper air pipe 1, and is diverted to the first condensation chamber 17, the second condensation chamber 19 and the third condensation chamber 20 through the diversion pipe 2. The vapor is discharged evenly through the perforated tube 16, condensed and liquefied through the condenser, and the liquefied hydrofluoric acid liquid falls into the liquid collecting layer 18. The hydrofluoric acid after distillation is discharged through the second liquid discharge head 11, and part of the hydrofluoric acid is discharged through the first liquid discharge head 9. Through the action of the fan 13, part of the air can be guided out from the air guide pipe 12 and discharged through the exhaust pipe 14. The filter cartridge 4 is clamped and fixed by the hoop frame 3.

[0026] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

Claims

1. An anhydrous hydrofluoric acid distillation tower, comprising a filter cartridge (4), a distillation tank (7), a distillation tower (10) and a fan (13), characterized in that: The interior of the distillation tower (10) is provided with a first condensation chamber (17), a second condensation chamber (19) and a third condensation chamber (20) in order from top to bottom. Condensation pipes and orifice pipes (16) are provided inside the first condensation chamber (17), the second condensation chamber (19) and the third condensation chamber (20). An upper air pipe (1) is provided at the top of the distillation tank (7). The upper air pipe (1) is connected to the first condensation chamber (17), the second condensation chamber (19) and the third condensation chamber (20) respectively through a plurality of branch pipes (2). A filter cartridge (4) is provided on one side of the distillation tank (7), and the filter cartridge (4) is connected to the distillation tank (7) through a flow guide pipe (5).

2. An anhydrous hydrofluoric acid distillation tower according to claim 1, characterized in that: The first condensation chamber (17), the second condensation chamber (19) and the third condensation chamber (20) are connected via a liquid collection layer (18), and a second liquid discharge head (11) is provided at one end of the liquid collection layer (18).

3. An anhydrous hydrofluoric acid distillation tower according to claim 2, characterized in that: A first liquid drain head (9) is provided at the middle of the bottom end of the distillation tower (10), and air-permeable drainage holes are provided on both sides of the liquid collection layer (18).

4. An anhydrous hydrofluoric acid distillation tower according to claim 1, characterized in that: The top of the distillation tower (10) is connected to a fan (13) via an air guide pipe (12), the fan (13) is connected to an exhaust pipe (14), and the air guide pipe (12) and the distillation tower (10) are embedded via a connector (15).

5. An anhydrous hydrofluoric acid distillation tower according to claim 1, characterized in that: A fixing frame (8) is provided in the middle of the distillation tank (7), a hoop frame (3) is provided on one side of the fixing frame (8), and the hoop frame (3) is clamped tightly on the outside of the filter cartridge (4).

6. An anhydrous hydrofluoric acid distillation tower according to claim 1, characterized in that: An activated carbon adsorption filter element is provided inside the filter cartridge (4), a heating coil (21) is provided inside the distillation tank (7), and control valves (6) are provided on both the flow guide pipe (5) and the flow diversion pipe (2).

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