Hydrogen fluoride pre-purification tower with high purification rate

Abstract

The utility model discloses a hydrogen fluoride pre-purification tower with high purification rate, which belongs to the technical field of purification towers and particularly comprises a tower body, a base fixedly arranged at the bottom of the tower body and a top cover fixedly arranged at the top of the tower body. The tower body comprises a gas inlet tower section; the liquid storage tower section is arranged at the bottom of the gas inlet tower section; a plurality of purification tower sections are arranged between the gas inlet tower section and the top cover, a pore plate distributor is fixedly arranged in each purification tower section, and a hydrogen fluoride purifying agent liquid inlet pipe is fixedly arranged above each pore plate distributor; according to the utility model, a traditional hanging scaffold type acid distribution structure is changed through the pore plate distributor, a hydrogen fluoride purifying agent can be uniformly distributed in the tower body by adopting an acid distribution mode of the pore plate distributor, and the contact area between the hydrogen fluoride purifying agent and hydrogen fluoride gas can be increased, so that the purification effect on the hydrogen fluoride gas is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of purification towers, and in particular relates to a hydrogen fluoride pre-purification tower with a high purification rate. Background Art

[0002] Aluminum fluoride is a colorless or white product. It is insoluble in water, acid and alkali. It is very stable and can be hydrolyzed when heated. It is mainly used in aluminum smelting to reduce the melting point and increase the conductivity of the electrolyte. It can also be used as an inhibitor of secondary fermentation in alcohol production, as a flux and glaze component for ceramic glaze and enamel glaze, and as a flux for smelting non-ferrous metals. It can be prepared by the reaction of aluminum trichloride with hydrofluoric acid and ammonia water. A large amount of tail gas containing hydrogen fluoride and sulfur dioxide will be generated during the production of aluminum fluoride.

[0003] When purifying hydrogen fluoride gas, the existing hydrogen fluoride purification tower generally injects a hydrogen fluoride purifier into the purification tower through a hanging tray type acid distribution device, so that the hydrogen fluoride purifier and the hydrogen fluoride gas are neutralized to purify the hydrogen fluoride gas. However, the use of the hanging tray type acid distribution device causes the hydrogen fluoride purifier to be unevenly distributed in the purification tower, reducing the contact area between the hydrogen fluoride purifier and the hydrogen fluoride gas, thereby affecting the purification effect of the hydrogen fluoride gas. Utility Model Content

[0004] In order to solve the problems raised in the above background technology, the utility model provides a hydrogen fluoride pre-purification tower with a high purification rate, which has the characteristics of being able to evenly distribute the hydrogen fluoride purifier and increasing the contact area between the hydrogen fluoride purifier and the hydrogen fluoride gas.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a high purification rate hydrogen fluoride pre-purification tower, comprising a tower body, a base fixedly arranged at the bottom of the tower body and a top cover fixedly arranged at the top of the tower body;

[0006] The tower body includes an air intake tower section;

[0007] A liquid storage tower section, used for collecting hydrogen fluoride purifier liquid, wherein the liquid storage tower section is arranged at the bottom of the air intake tower section;

[0008] The purification tower section is used to purify hydrogen fluoride gas. A plurality of purification tower sections are arranged between the air intake tower section and the top cover. A perforated plate distributor is fixedly arranged in the purification tower section. A hydrogen fluoride purifier liquid inlet pipe is fixedly arranged above the perforated plate distributor.

[0009] Preferably, a hydrogen fluoride gas inlet is provided on the air intake tower section.

[0010] Preferably, a liquid drain pipe is provided on the liquid storage tower section.

[0011] Preferably, a hydrogen fluoride gas outlet is provided on the top cover.

[0012] Preferably, the orifice plate distributor is made of polytetrafluoroethylene.

[0013] Preferably, it further comprises a hydrogen fluoride recovery mechanism disposed in the liquid storage tower section, the hydrogen fluoride recovery mechanism comprising a drainage hopper and a liquid discharge hopper fixedly disposed at the bottom of the drainage hopper, a partition fixedly connected to the liquid storage tower section is disposed at the bottom of the liquid discharge hopper, and a heating wire is fixedly disposed below the partition;

[0014] A steam exhaust pipe is arranged on the liquid storage tower section and below the partition, and a condensing device is connected to the steam exhaust pipe.

[0015] Preferably, a filter cartridge is fixedly disposed in the drainage bucket, and a coarse filter screen and a fine filter screen are disposed in the filter cartridge.

[0016] Preferably, it also includes a sealing assembly arranged below the filter cartridge, which is used to open and close the filter cartridge, the sealing assembly includes a rotating shaft rotatably arranged on the drainage bucket and a flip plate fixedly arranged on the rotating shaft, the flip plate is adapted to the inner wall of the drainage bucket, and one end of the rotating shaft is connected to a motor fixedly arranged on the partition.

[0017] Compared with the prior art, the beneficial effects of the utility model are:

[0018] The utility model changes the traditional hanging plate type acid distribution structure through the orifice plate distributor, and adopts the acid distribution method of the orifice plate distributor, so that the hydrogen fluoride purifier can be evenly distributed inside the tower body, and the contact area between the hydrogen fluoride purifier and the hydrogen fluoride gas can be increased, thereby improving the purification effect of the hydrogen fluoride gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0020] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of the present utility model;

[0021] Figure 2 This is a schematic diagram of the structure of Embodiment 2 of the present utility model;

[0022] Figure 3 This is a schematic diagram of the three-dimensional structure of the liquid storage tower section of Example 2 of the utility model;

[0023] Figure 4This is a schematic diagram of the cross-sectional structure of a liquid storage tower section in Example 2 of the utility model;

[0024] In the figure: 1. base; 2. top cover; 3. air inlet tower section; 4. liquid storage tower section; 5. purification tower section; 6. orifice plate distributor; 7. hydrogen fluoride purifier liquid inlet pipe; 8. hydrogen fluoride gas inlet; 9. drain pipe; 10. hydrogen fluoride gas outlet; 11. drainage bucket; 12. drain bucket; 13. partition; 14. heating wire; 15. steam discharge pipe; 16. coarse filter; 17. fine filter; 18. flip plate; 19. motor. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] Example 1

[0027] See also Figure 1 This embodiment provides the following technical solution: a high purification rate hydrogen fluoride pre-purification tower, comprising a tower body, a base 1 fixedly arranged at the bottom of the tower body, and a top cover 2 fixedly arranged at the top of the tower body.

[0028] The tower body includes an air inlet tower section 3 ; a hydrogen fluoride gas inlet 8 is provided on the air inlet tower section 3 . In some embodiments, a plurality of hydrogen fluoride gas inlets 8 may be provided, through which the hydrogen fluoride gas to be purified can enter the interior of the tower body.

[0029] The liquid storage tower section 4 is used to collect the hydrogen fluoride purifier liquid. The liquid storage tower section 4 is arranged at the bottom of the air inlet tower section 3. The liquid storage tower section 4 can collect the hydrogen fluoride purifier liquid after contacting the hydrogen fluoride gas.

[0030] The purification tower section 5 is used to purify the hydrogen fluoride gas. A plurality of purification tower sections 5 are arranged between the air inlet tower section 3 and the top cover 2. A perforated plate distributor 6 is fixedly arranged in the purification tower section 5. A hydrogen fluoride purifier liquid inlet pipe 7 is fixedly arranged above the perforated plate distributor 6. The perforated plate distributor 6 changes the traditional hanging plate type acid distribution structure. The acid distribution method of the perforated plate distributor 6 can make the hydrogen fluoride purifier evenly distributed inside the tower body, and can increase the contact area between the hydrogen fluoride purifier and the hydrogen fluoride gas, thereby improving the purification effect of the hydrogen fluoride gas.

[0031] In some embodiments, a plurality of hydrogen fluoride purifier liquid inlet pipes 7 may be provided, which is beneficial for the hydrogen fluoride purifier to enter the interior of the purification tower section 5 .

[0032] A liquid discharge pipe 9 is provided on the liquid storage tower section 4, through which the hydrogen fluoride purifier can be discharged from the tower body.

[0033] The top cover 2 is provided with a hydrogen fluoride gas outlet 10 , through which the hydrogen fluoride gas can be discharged from the tower body.

[0034] The orifice plate distributor 6 is made of polytetrafluoroethylene. Polytetrafluoroethylene, also known as Teflon, is a polymer material known for its excellent chemical stability, heat resistance and electrical insulation. Using polytetrafluoroethylene when manufacturing the orifice plate distributor 64 can ensure that the orifice plate maintains its performance in harsh chemical environments and is not corroded.

[0035] Working principle: Hydrogen fluoride gas enters the air inlet tower section 3 through the hydrogen fluoride inlet, and the control system causes the discharge pipe 9 to transport the hydrogen fluoride purifier to the purification tower section 5. The hydrogen fluoride purifier contacts the hydrogen fluoride gas after being diverted by the orifice distributor 6, increasing the contact area between the hydrogen fluoride purifier and the hydrogen fluoride gas. The purified hydrogen fluoride gas is discharged from the tower body through the hydrogen fluoride gas outlet 10, while the hydrogen fluoride purifier falls into the liquid storage tower section 4 and is stored.

[0036] Example 2

[0037] See also Figure 2-4 , and also includes a hydrogen fluoride recovery mechanism arranged in the liquid storage tower section 4, the hydrogen fluoride recovery mechanism includes a drainage bucket 11 and a drainage bucket 12 fixedly arranged at the bottom of the drainage bucket 11, a partition 13 fixedly connected to the liquid storage tower section 4 is arranged at the bottom of the drainage bucket 12, and a heating wire 14 is fixedly arranged below the partition 13. The hydrogen fluoride purifier in the liquid storage tower section 4 is heated by the heating wire 14, and the hydrogen fluoride purifier is heated to boiling. Since the boiling point of hydrogen fluoride is lower than that of water, the heated hydrogen fluoride will evaporate before water.

[0038] The steam exhaust pipe 15 is arranged on the liquid storage tower section 4, and the steam exhaust pipe 15 is arranged below the partition 13. The steam exhaust pipe 15 is connected with a condensing device. Through the steam exhaust pipe 15 and the condensing device, the hydrogen fluoride vapor can be discharged and enter the inside of the condensing device, so that the hydrogen fluoride vapor is condensed into liquid, which is convenient for workers to recycle the hydrogen fluoride purifier.

[0039] A filter cartridge is fixedly provided in the drain hopper 12, and a coarse filter screen 16 and a fine filter screen 17 are provided in the filter cartridge. The coarse filter screen 16 and the fine filter screen 17 can remove suspended matter and impurities in the hydrogen fluoride purifier entering the liquid storage tower section 4, so as to facilitate the subsequent recovery of the hydrogen fluoride purifier.

[0040] It also includes a plugging component arranged below the filter cartridge, which is used to open and close the filter cartridge. The plugging component includes a rotating shaft rotatably arranged on the drainage bucket 12 and a flip plate 18 fixedly arranged on the rotating shaft. The flip plate 18 is adapted to the inner wall of the drainage bucket 12. One end of the rotating shaft is connected to a motor 19 fixedly arranged on the partition 13. Through the motor 19, the flip plate 18 can be flipped around the rotating shaft as the center, so that the drainage bucket 12 can be in an open or closed state. When the drainage bucket 12 is in an open state, the hydrogen fluoride purifier can enter the liquid storage tower section 4. When the drainage bucket 12 is in a closed state, the heating wire 14 can be controlled to heat and evaporate the hydrogen fluoride purifier in the liquid storage tower section 4.

[0041] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A hydrogen fluoride pre-purification tower with a high purification rate, characterized in that: It comprises a tower body, a base (1) fixedly arranged at the bottom of the tower body, and a top cover (2) fixedly arranged at the top of the tower body; The tower body comprises an air intake tower section (3); A liquid storage tower section (4) for collecting hydrogen fluoride purifier liquid, wherein the liquid storage tower section (4) is arranged at the bottom of the air intake tower section (3); A purification tower section (5) is used to purify hydrogen fluoride gas. A plurality of purification tower sections (5) are arranged between the air inlet tower section (3) and the top cover (2). An orifice plate distributor (6) is fixedly arranged inside the purification tower section (5). A hydrogen fluoride purifier liquid inlet pipe (7) is fixedly arranged above the orifice plate distributor (6).

2. A high purification rate hydrogen fluoride pre-purification tower according to claim 1, characterized in that: The air inlet tower section (3) is provided with a hydrogen fluoride gas inlet (8).

3. A high purification rate hydrogen fluoride pre-purification tower according to claim 1, characterized in that: The liquid storage tower section (4) is provided with a liquid discharge pipe (9).

4. A high purification rate hydrogen fluoride pre-purification tower according to claim 1, characterized in that: The top cover (2) is provided with a hydrogen fluoride gas outlet (10).

5. A high purification rate hydrogen fluoride pre-purification tower according to claim 1, characterized in that: The orifice plate distributor (6) is made of polytetrafluoroethylene.

6. A high purification rate hydrogen fluoride pre-purification tower according to claim 1, characterized in that: It also includes a hydrogen fluoride recovery mechanism disposed in the liquid storage tower section (4), the hydrogen fluoride recovery mechanism comprising a drainage hopper (11) and a liquid discharge hopper (12) fixedly disposed at the bottom of the drainage hopper (11), a partition (13) fixedly connected to the liquid storage tower section (4) disposed at the bottom of the liquid discharge hopper (12), and a heating wire (14) fixedly disposed below the partition (13); A steam exhaust pipe (15), wherein the steam exhaust pipe (15) is arranged on the liquid storage tower section (4), and the steam exhaust pipe (15) is arranged below the partition plate (13), and a condensing device is connected to the steam exhaust pipe (15).

7. A high purification rate hydrogen fluoride pre-purification tower according to claim 6, characterized in that: A filter cartridge is fixedly arranged in the drainage bucket (12), and a coarse filter screen (16) and a fine filter screen (17) are arranged in the filter cartridge.

8. A high purification rate hydrogen fluoride pre-purification tower according to claim 7, characterized in that: It also includes a plugging assembly arranged below the filter cartridge and used for opening and closing the filter cartridge, the plugging assembly including a rotating shaft rotatably arranged on the drainage bucket (12) and a flip plate (18) fixedly arranged on the rotating shaft, the flip plate (18) being adapted to be arranged on the inner wall of the drainage bucket (12), and one end of the rotating shaft being connected to a motor (19) fixedly arranged on the partition (13).

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