A rectification purification device and method for producing grade g5 hydrochloric acid

Abstract

The application discloses a G5-grade hydrochloric acid production rectification and purification device and method, relates to the technical field of hydrochloric acid rectification and purification, and comprises a purification assembly and a rectification assembly, wherein the purification assembly is located above the rectification assembly; the purification assembly is composed of a plurality of purification trays, the plurality of purification trays are arranged vertically along an axial direction, and the purification tray is composed of a fixed tray and a plurality of conveying grooves; a filler layer is arranged in the conveying groove; the rectification assembly is composed of a supporting column and a rectification tray, the rectification tray is arranged on the side of the supporting column far from the purification tray, and the rectification tray is connected with the supporting column; when the number of hydrochloric acid droplets in the tension bowl increases, the hydrochloric acid droplets form a tension film again under the action of the tension holes on the rest surface of the tension bowl, and then the hydrochloric acid vapor can pass through the same tension bowl for multiple times when being conveyed to the liquid outlet pipe through the tension bowl, so that the hydrochloric acid vapor and the hydrochloric acid droplets are fully contacted and subjected to multiple purity exchange treatments.

Description

Technical Field

[0001] This invention relates to the field of hydrochloric acid distillation and purification technology, specifically a distillation and purification apparatus and method for producing G5 grade hydrochloric acid. Background Technology

[0002] G5 grade hydrochloric acid refers to high-purity hydrochloric acid that meets SEMI standards and has a metal impurity content of less than 0.1 ppb. It is widely used in high-end fields such as semiconductor manufacturing, photovoltaics, and electronic chemicals. Meanwhile, distillation and purification equipment for hydrochloric acid production is a type of chemical equipment used to improve the purity of hydrochloric acid and remove impurities. It is widely used in the preparation process of high-purity hydrochloric acid. Existing distillation purification devices for hydrochloric acid production typically include a purification section and a rectification section, with packing layers or trays inside to increase the gas-liquid contact area. However, in actual operation, the contact between hydrochloric acid vapor and hydrochloric acid droplets is often insufficient, and the number of purity exchanges is limited, resulting in low purification efficiency and difficulty in consistently meeting the stringent purity requirements of G5 grade hydrochloric acid. Summary of the Invention

[0003] The purpose of this invention is to provide a distillation and purification apparatus and method for producing G5 grade hydrochloric acid, so as to solve the problem of limited gas-liquid purity exchange times in the prior art.

[0004] To achieve the above objectives, the present invention provides the following technical solution: A distillation and purification apparatus for producing G5 grade hydrochloric acid includes a purification component and a distillation component, wherein the purification component is located above the distillation component. The purification assembly consists of several purification discs arranged vertically along the axial direction. Each purification disc consists of a fixed disc and several conveying grooves arranged around the axis of the fixed disc. A packing layer is provided inside each conveying groove. The distillation assembly consists of a support column and a distillation tray. The support column is located at the center of several purification trays and is connected to several purification trays. The distillation tray is located on the side of the support column away from the purification trays and is connected to the support column. The purification and distillation components are equipped with a shell. A liquid outlet pipe is provided at the top of the shell, and an impurity pipe is provided at the bottom of the shell. A steam port is provided on the side wall of the shell near the liquid outlet pipe. The highest point of the steam port is located below the lower surface of the distillation tray.

[0005] Hydrochloric acid vapor is supplied into the shell through the steam port, causing the hydrochloric acid vapor to move along the axis of the shell. The hydrochloric acid vapor moves from the bottom to the top of the shell. When the hydrochloric acid vapor moves to the top of the shell, as the hydrochloric acid vapor rises, the temperature of the hydrochloric acid vapor decreases, and the hydrochloric acid vapor will condense at the top of the shell, thus forming hydrochloric acid droplets. Most of the hydrochloric acid droplets are discharged through the liquid outlet pipe, while the other part of the hydrochloric acid droplets move towards the purification plate. When hydrochloric acid vapor enters the shell from the vapor port, since the highest point of the vapor port is located below the lower surface of the distillation tray, the hydrochloric acid vapor will first pass through the distillation tray and then flow to the purification component through the distillation tray. Hydrochloric acid vapor passing through the distillation pan sequentially passes through several purification pans, and then moves through several conveying tanks. During its movement, it passes through the packing layer, which absorbs impurities in the hydrochloric acid vapor. Simultaneously, as the hydrochloric acid vapor rises, it continuously condenses to form hydrochloric acid droplets, which then drip onto the surface of the purification pans. This causes the hydrochloric acid vapor and hydrochloric acid droplets to meet in the purification pans, resulting in an exchange of gas-liquid purity. As hydrochloric acid vapor continuously passes through the purification plate and encounters hydrochloric acid droplets repeatedly in the purification plate, the purity of the hydrochloric acid vapor increases continuously and improves during the exchange process with the hydrochloric acid vapor. The hydrochloric acid vapor that just entered from the steam inlet is the original vapor phase, and the hydrochloric acid droplets that condense in the shell are the original liquid phase. The original vapor phase and the original liquid phase meet and exchange in the purification pan to form a new vapor phase and a new liquid phase. Since the purity of hydrochloric acid in the new vapor phase is greater than that in the original vapor phase, the concentration of hydrochloric acid in the new liquid phase is less than that in the original liquid phase. As a result, the lighter components rise and the heavier components fall, so that the concentration of hydrochloric acid in the new liquid phase generated at the bottom of the shell approaches zero, and the concentration of hydrochloric acid in the new vapor phase generated at the top of the shell is the highest.

[0006] Preferably, each of the conveying troughs is provided with two sets of tension groups, which are located on the upper and lower sides of the packing layer; each tension group consists of several tension cups, which are arranged at equal intervals in the conveying trough.

[0007] Hydrochloric acid vapor moves from the bottom to the top of the purification pan, while hydrochloric acid droplets move from the top to the bottom. The hydrochloric acid droplets form a tension film under the action of the tension bowls. As the hydrochloric acid vapor rises, it first passes through the tension film formed by the tension bowls, then through the packing layer for impurity treatment, and finally through another tension film formed by the tension bowls. This allows the hydrochloric acid vapor to undergo multiple purity exchanges, thereby improving the quality of hydrochloric acid purification.

[0008] Preferably, the tension bowl has a trapezoidal cross-section, and tension holes are provided on each face of the tension bowl.

[0009] Because the tension bowl has a trapezoidal cross-section and tension holes on each side, hydrochloric acid droplets falling into the bowl form a tension film at the rim due to the trapezoidal structure. Simultaneously, as the number of hydrochloric acid droplets increases, they pass through the tension holes on the other sides of the bowl, causing them to form another tension film. This allows the hydrochloric acid vapor to pass through the same tension bowl multiple times as it is transported towards the outlet pipe, ensuring sufficient contact between the vapor and droplets and enabling multiple purity exchanges, thus further improving the efficiency of hydrochloric acid purification.

[0010] Preferably, the support column consists of a fixed tube and a rotating column, the rotating column is located inside the fixed tube, the rotating column is rotatably and sealed to the fixed tube, the bottom of the rotating column is connected to the distillation tray, and the top of the rotating column is provided with a power component.

[0011] After hydrochloric acid vapor is input, the controller starts the power unit, which drives the rotating column to rotate. During the rotation of the rotating column, the distillation tray rotates. As the distillation tray rotates, it rotates several fixed bars to the top of the vapor port in sequence, so that some vapor enters the distillation tube through the air inlet groove. This allows the hydrochloric acid vapor to exchange purity with the hydrochloric acid droplets for the first time in the distillation tube.

[0012] Preferably, the distillation tray consists of a central ring and several fixing bars, which are arranged around the axis of the central ring. Several distillation tubes are provided at the top of each fixing bar, and several connecting pipes are provided inside each fixing bar. The connecting pipes pass through the fixing bars and are connected to the distillation tubes.

[0013] When the rotating column rotates, it drives the central ring to rotate, which in turn drives the fixed bar to rotate. The fixed bar, in turn, drives several distillation tubes to rotate, causing the distillation tubes to revolve around the axis of the fixed bar. When one of the fixed bars rotates to the top of the steam inlet, the hydrochloric acid vapor input from the steam inlet moves to the bottom of the fixed bar and is then transported from the bottom of the fixed bar to the connecting pipe, and then through the connecting pipe to the distillation tubes, and finally through the distillation tubes to the purification tray located at the bottom.

[0014] Preferably, the upper surface diameter of the distillation tube is smaller than the lower surface diameter of the distillation tube, and the surface of the distillation tube is provided with a plurality of gas outlet holes, which are connected to the distillation tube.

[0015] Because the upper surface diameter of the distillation tube is smaller than the lower surface diameter, and the surface of the distillation tube has several vent holes, hydrochloric acid droplets will also form on the outer surface of the distillation tube. These hydrochloric acid droplets will also form a tension film on the surface of the vent holes. By controlling the rotation speed of the rotating column through the power component, the rotation rate of the rotating column is kept low. As a result, the rotation of the distillation plate will not cause the tension film to break, allowing the hydrochloric acid vapor transported through the distillation tube to undergo initial purity exchange treatment.

[0016] Preferably, the bottom of the fixing bar is provided with an air inlet groove, and the distillation tray is radially arranged.

[0017] During the rotation of the distillation tray, the distillation tray drives several fixed bars to rotate. As the fixed bars rotate, they drive the air inlet groove to rotate, so that the air inlet groove rotates to the top of the steam port. Then, after the hydrochloric acid vapor is delivered to the shell, the hydrochloric acid vapor will enter the air inlet groove and be restricted by the air inlet groove. Therefore, the hydrochloric acid vapor located in the air inlet groove can only be delivered to the connecting pipe.

[0018] Preferably, a heating vessel is provided at the bottom of the shell.

[0019] Some of the condensed hydrochloric acid droplets eventually fall to the bottom of the shell. As the hydrochloric acid droplets exchange purity with the hydrochloric acid vapor multiple times during their fall, the hydrochloric acid in the liquid at the bottom of the shell has a lower purity. As a result, the controller starts the heating vessel to heat the hydrochloric acid liquid at the bottom of the shell. The heated hydrochloric acid liquid then outputs hydrochloric acid in the form of vapor, which is then converted into hydrochloric acid vapor again. The re-formed hydrochloric acid vapor continues to undergo distillation and purification along the axis of the shell. After the final hydrochloric acid vapor purification is completed, the remaining impurity liquid at the bottom of the shell is discharged out through the impurity pipe.

[0020] A distillation purification method for producing G5 grade hydrochloric acid includes the following steps: S1: Hydrochloric acid vapor is introduced into the shell through the vapor port and moves along the axis of the shell towards the top of the shell; S2: Hydrochloric acid vapor passes through a distillation tray and several purification trays in sequence during its movement; S3: As hydrochloric acid vapor rises, it condenses upon cooling to form hydrochloric acid droplets. These droplets fall onto the surfaces of the distillation and purification pans and form a tension film on the surface of the tension bowl and the vent. S4: During the movement of hydrochloric acid vapor, it encounters the tension membrane, allowing the hydrochloric acid vapor and hydrochloric acid droplets to exchange purity. S5: The hydrochloric acid liquid that condenses at the top of the shell slides down the side wall of the shell to the outlet pipe and is discharged through the outlet pipe, while the impurity liquid that falls to the bottom of the shell is discharged through the impurity pipe.

[0021] Compared with the prior art, the beneficial effects of the present invention are: The purification tray is equipped with two sets of tension groups, one above the other. Each tension group consists of multiple tension bowls with a trapezoidal cross-section, and tension holes are opened on each surface of each tension bowl. When hydrochloric acid droplets fall into the tension bowl, a tension film can be formed multiple times at the bowl opening and the tension holes. This allows the hydrochloric acid vapor to repeatedly pass through the same tension bowl during its ascent and have multiple full contacts with the tension film, thereby achieving multiple continuous gas-liquid purity exchanges. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the external structure of the present invention; Figure 2 This is a schematic diagram of the internal structure of the present invention; Figure 3 This is a schematic diagram of the distillation tray structure; Figure 4 This is a schematic diagram of the internal structure of the support column and distillation tray; Figure 5 for Figure 3 Enlarged view of point B in the middle; Figure 6 This is a schematic diagram of the cross-sectional structure of the purification disc; Figure 7 A schematic diagram of the structure of the fixed plate, conveying trough, and packing layer; Figure 8 This is a cross-sectional front view of the purification disc; Figure 9 for Figure 6 Enlarged view of point A in the middle; In the diagram: 1. Purification component; 11. Purification disc; 12. Fixed disc; 13. Conveying trough; 14. Packing layer; 15. Tension assembly; 151. Tension bowl; 152. Tension hole; 2. Distillation assembly; 21. Support column; 22. Distillation tray; 221. Central ring; 222. Fixing bar; 223. Distillation tube; 224. Connecting pipe; 225. Gas outlet; 226. Gas inlet groove; 23. Fixing pipe; 24. Rotating column; 3. Shell; 31. Liquid outlet pipe; 32. Impurity pipe; 33. Steam port. Detailed Implementation

[0023] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0024] like Figures 1-5 The first embodiment of the present invention shown is a distillation and purification device for producing G5 grade hydrochloric acid, which includes a purification component 1 and a distillation component 2, wherein the purification component 1 is located above the distillation component 2. The purification component 1 consists of a plurality of purification discs 11, which are arranged vertically along the axial direction. Each purification disc 11 consists of a fixed disc 12 and a plurality of conveying grooves 13, which are arranged around the axis of the fixed disc 12. A packing layer 14 is provided inside the conveying groove 13. The distillation assembly 2 consists of a support column 21 and a distillation tray 22. The support column 21 is located at the center of several purification trays 11 and is connected to several purification trays 11. The distillation tray 22 is located on the side of the support column 21 away from the purification trays 11 and is connected to the support column 21. The purification component 1 and the distillation component 2 are provided with a shell 3. The top of the shell 3 is provided with a liquid outlet pipe 31 and the bottom of the shell 3 is provided with an impurity pipe 32. A steam port 33 is provided on the side wall of the shell 3 near the liquid outlet pipe 31. The highest point of the steam port 33 is located below the lower surface of the distillation tray 22.

[0025] In one specific embodiment of the present invention, the support column 21 is composed of a fixed tube 23 and a rotating column 24. The rotating column 24 is located inside the fixed tube 23 and is rotatably and sealedly connected to the fixed tube 23. The bottom of the rotating column 24 is connected to the distillation tray 22, and a power component (the power component is a motor) is provided on the top of the rotating column 24.

[0026] In one specific embodiment of the present invention, the distillation tray 22 is composed of a central ring 221 and a plurality of fixing bars 222. The plurality of fixing bars 222 are arranged around the axis of the central ring 221. A plurality of distillation tubes 223 are provided at the top of the fixing bars 222. A plurality of connecting pipes 224 are provided inside the fixing bars 222. The connecting pipes 224 penetrate the fixing bars 222 and communicate with the distillation tubes 223.

[0027] In one specific embodiment of the present invention, the upper surface diameter of the distillation tube 223 is smaller than the lower surface diameter of the distillation tube 223, and a plurality of gas outlet holes 225 are provided on the surface of the distillation tube 223, the gas outlet holes 225 being connected to the distillation tube 223.

[0028] In one specific embodiment of the present invention, an air inlet groove 226 is provided at the bottom of the fixing strip 222, and the distillation tray 22 is radially arranged.

[0029] In one specific embodiment of the present invention, a heating vessel is provided at the bottom of the housing 3.

[0030] like Figures 6-9 The second embodiment of the present invention shown provides a conveying tank 13 structure that is different from that of the first embodiment. The difference is that the internal structure of the conveying tank 13 is changed in this embodiment, thereby increasing the number of tension films formed by hydrochloric acid droplets, so that hydrochloric acid vapor can come into contact with the tension film multiple times.

[0031] The specific content is as follows: In one specific embodiment of the present invention, each conveying trough 13 is provided with two sets of tension groups 15, which are located on the upper and lower sides of the packing layer 14. Each tension group 15 is composed of a plurality of tension cups 151, which are arranged at equal intervals in the conveying trough 13.

[0032] In one specific embodiment of the present invention, the cross-section of the tension bowl 151 is trapezoidal, and tension holes 152 are provided on each surface of the tension bowl 151.

[0033] A distillation purification method for producing G5 grade hydrochloric acid includes the following steps: S1: Hydrochloric acid vapor is introduced into the housing 3 through the vapor port 33 and moves along the axis of the housing 3 toward the top of the housing 3; S2: Hydrochloric acid vapor passes through distillation tray 22 and several purification trays 11 in sequence during its movement; S3: As hydrochloric acid vapor rises, it encounters cold and condenses to form hydrochloric acid droplets. The hydrochloric acid droplets fall onto the surface of distillation tray 22 and purification tray 11, and form a tension film on the surface of tension bowl 151 and vent 225. S4: During the movement of hydrochloric acid vapor, it encounters the tension membrane, allowing the hydrochloric acid vapor and hydrochloric acid droplets to exchange purity. S5: The hydrochloric acid liquid that condenses on the top of the shell 3 slides down the side wall of the shell 3 to the outlet pipe 31 and is discharged through the outlet pipe 31. The impurity liquid that falls to the bottom of the shell 3 is discharged through the impurity pipe 32.

[0034] Working principle of the invention: Hydrochloric acid vapor is supplied into the shell 3 through the steam port 33, causing the hydrochloric acid vapor to move along the axis of the shell 3. The hydrochloric acid vapor moves from the bottom to the top of the shell 3. When the hydrochloric acid vapor moves to the top of the shell 3, as the hydrochloric acid vapor rises, the temperature of the hydrochloric acid vapor decreases, and the hydrochloric acid vapor will condense at the top of the shell 3, thus forming hydrochloric acid droplets. Most of the hydrochloric acid droplets are discharged through the liquid outlet pipe 31, while the other part of the hydrochloric acid droplets move towards the purification plate 11. When hydrochloric acid vapor enters the shell 3 from the vapor port 33, since the highest point of the vapor port 33 is located below the lower surface of the distillation plate 22, the hydrochloric acid vapor will first pass through the distillation plate 22 and then flow through the distillation plate 22 to the purification component 1. Hydrochloric acid vapor passing through distillation plate 22 sequentially passes through several purification plates 11, and then moves through several conveying tanks 13. During the movement, it passes through packing layer 14, which absorbs impurities in the hydrochloric acid vapor. At the same time, as the hydrochloric acid vapor rises, it continuously condenses to form hydrochloric acid droplets, which then drip onto the surface of purification plate 11. This causes the hydrochloric acid vapor and hydrochloric acid droplets to meet in the purification plate 11, resulting in gas-liquid purity exchange. As hydrochloric acid vapor continuously passes through the purification plate 11 and continuously encounters hydrochloric acid droplets in the purification plate 11, the purity of the hydrochloric acid vapor increases continuously and improves during the exchange process with the hydrochloric acid vapor. The hydrochloric acid vapor that just entered from the steam port 33 is the original vapor phase, and the hydrochloric acid droplets that condense in the shell 3 are the original liquid phase. The original vapor phase and the original liquid phase meet and exchange in the purification plate 11 to form a new vapor phase and a new liquid phase. Since the purity of hydrochloric acid in the new vapor phase is greater than that in the original vapor phase, the concentration of hydrochloric acid in the new liquid phase is less than that in the original liquid phase. As a result, the light components rise and the heavy components fall, so that the concentration of hydrochloric acid in the new liquid phase generated at the bottom of the shell 3 is close to zero, and the concentration of hydrochloric acid in the new vapor phase generated at the top of the shell 3 is the highest. After hydrochloric acid vapor is input, the controller starts the power component, which drives the rotating column 24 to rotate. During the rotation of the rotating column 24, the distillation tray 22 rotates. During the rotation of the distillation tray 22, several fixed bars 222 are rotated sequentially to the top of the steam port 33, so that some of the vapor enters the distillation tube 223 through the air inlet groove 226, so that the hydrochloric acid vapor exchanges purity with the hydrochloric acid droplets for the first time in the distillation tube 223. When the rotating column 24 rotates, it drives the central ring 221 to rotate. The central ring 221, in turn, drives the fixed bar 222 to rotate. The fixed bar 222, in turn, drives several distillation tubes 223 to rotate, causing the tubes 223 to revolve around the axis of the fixed bar 222. Furthermore, when one of the fixed bars 222 rotates above the steam port 33, the hydrochloric acid vapor input from the steam port 33 moves to the bottom of the fixed bar 222. During the rotation of the distillation tray 22, the distillation tray 22... Several fixed bars 222 rotate, and during the rotation of the fixed bars 222, the air inlet groove 226 rotates, so that the air inlet groove 226 rotates to the top of the steam port 33. Then, after the hydrochloric acid vapor is delivered to the shell 3, the hydrochloric acid vapor will enter the air inlet groove 226 and be restricted by the air inlet groove 226. Therefore, the hydrochloric acid vapor located in the air inlet groove 226 can only be delivered to the connecting pipe 224; then through the connecting pipe 224, it is delivered to the distillation pipe 223, and finally through the distillation pipe 223, it is delivered to the purification plate 11 located at the bottom. Since the upper surface diameter of the distillation tube 223 is smaller than the lower surface diameter, and the surface of the distillation tube 223 is provided with several vent holes 225, hydrochloric acid droplets will also form on the outer surface of the distillation tube 223. The hydrochloric acid droplets will also form a tension film on the surface of the vent holes 225. By controlling the rotation speed of the rotating column 24 through the power component, the rotation rate of the rotating column 24 is kept low. As a result, the rotation of the distillation tray 22 will not cause the tension film to break, so that the hydrochloric acid vapor transported through the distillation tube 223 can undergo initial purity exchange treatment. Hydrochloric acid vapor moves from the bottom to the top of the purification plate 11, while hydrochloric acid droplets move from the top to the bottom of the purification plate 11. The hydrochloric acid droplets form a tension film under the action of the tension bowl 151, so that the hydrochloric acid vapor first passes through the tension film formed by the tension bowl 151 during its upward movement, then passes through the packing layer 14 for impurity treatment, and finally passes through the tension film formed by the tension bowl 151 again, thus allowing the hydrochloric acid vapor to undergo multiple purity exchanges. Because the cross-section of the tension bowl 151 is trapezoidal, and each side of the tension bowl 151 is provided with tension holes 152, when hydrochloric acid droplets fall into the tension bowl 151, a tension film will form at the mouth of the tension bowl 151 under the action of the trapezoidal structure. At the same time, when the number of hydrochloric acid droplets in the tension bowl 151 increases, the hydrochloric acid droplets will form a tension film again under the action of the tension holes 152 on the other sides of the tension bowl 151. As a result, when the hydrochloric acid vapor is transported through the tension bowl 151 to the outlet pipe 31, it can pass through the same tension bowl 151 multiple times, so that the hydrochloric acid vapor and hydrochloric acid droplets can be fully contacted and undergo multiple purity exchange treatments. Some of the condensed hydrochloric acid droplets eventually fall to the bottom of the shell 3. As the hydrochloric acid droplets exchange purity with the hydrochloric acid vapor multiple times during their fall, the hydrochloric acid in the liquid that falls to the bottom of the shell 3 has a low purity. As a result, the controller starts the heating vessel, which heats the hydrochloric acid liquid at the bottom of the shell 3. The heated hydrochloric acid liquid outputs hydrochloric acid in the form of vapor, which then forms hydrochloric acid vapor again. The newly formed hydrochloric acid vapor then continues to undergo distillation and purification along the axis of the shell 3. After the final hydrochloric acid vapor purification is completed, the remaining impurity liquid at the bottom of the shell 3 is discharged out through the impurity pipe 32.

[0035] It will be apparent 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 invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A distillation and purification apparatus for producing G5 grade hydrochloric acid, characterized in that: It includes a purification component (1) and a distillation component (2), wherein the purification component (1) is located above the distillation component (2); The purification component (1) consists of a plurality of purification discs (11), which are arranged vertically along the axial direction. Each purification disc (11) consists of a fixed disc (12) and a plurality of conveying grooves (13), which are arranged around the axis of the fixed disc (12). A packing layer (14) is provided inside the conveying grooves (13). The distillation assembly (2) consists of a support column (21) and a distillation plate (22). The support column (21) is located at the center of several purification plates (11) and is connected to several purification plates (11). The distillation plate (22) is located on the side of the support column (21) away from the purification plates (11) and is connected to the support column (21). The purification component (1) and the distillation component (2) are provided with a shell (3). The top of the shell (3) is provided with a liquid outlet pipe (31), and the bottom of the shell (3) is provided with an impurity pipe (32). A steam port (33) is provided on the side wall of the shell (3) near the liquid outlet pipe (31). The highest point of the steam port (33) is located below the lower surface of the distillation tray (22). Each of the conveying troughs (13) is provided with two sets of tension groups (15), which are located on the upper and lower sides of the packing layer (14); each tension group (15) is composed of several tension cups (151), which are arranged at equal intervals in the conveying trough (13). The cross-section of the tension bowl (151) is trapezoidal, and tension holes (152) are provided on each surface of the tension bowl (151).

2. The distillation and purification apparatus for G5 grade hydrochloric acid production according to claim 1, characterized in that: The support column (21) consists of a fixed tube (23) and a rotating column (24). The rotating column (24) is located inside the fixed tube (23). The rotating column (24) is rotatably and sealed to the fixed tube (23). The bottom of the rotating column (24) is connected to the distillation tray (22). The top of the rotating column (24) is provided with a power component.

3. The distillation and purification apparatus for G5 grade hydrochloric acid production according to claim 2, characterized in that: The distillation tray (22) consists of a central ring (221) and several fixing bars (222). The fixing bars (222) are arranged around the axis of the central ring (221). Several distillation tubes (223) are provided on the top of the fixing bars (222). Several connecting pipes (224) are provided inside the fixing bars (222). The connecting pipes (224) pass through the fixing bars (222) and are connected to the distillation tubes (223).

4. The distillation and purification apparatus for G5 grade hydrochloric acid production according to claim 3, characterized in that: The upper surface diameter of the distillation tube (223) is smaller than the lower surface diameter of the distillation tube (223). The surface of the distillation tube (223) is provided with a plurality of gas outlet holes (225), which are connected to the distillation tube (223).

5. A distillation and purification apparatus for producing G5-grade hydrochloric acid according to claim 3, characterized in that: The bottom of the fixing bar (222) is provided with an air inlet groove (226), and the distillation plate (22) is radial.

6. The distillation and purification apparatus for G5 grade hydrochloric acid production according to claim 1, characterized in that: A heating vessel is provided at the bottom of the shell (3).

7. A distillation purification method for producing G5 grade hydrochloric acid, characterized in that: The distillation and purification apparatus for producing G5-grade hydrochloric acid as described in claim 4 includes the following steps: Includes the following steps: S1: Hydrochloric acid vapor is introduced into the shell (3) through the vapor port (33) and moves along the axis of the shell (3) toward the top of the shell (3); S2: Hydrochloric acid vapor passes through a distillation tray (22) and several purification trays (11) in sequence during its movement. S3: As the hydrochloric acid vapor rises, it condenses upon cooling to form hydrochloric acid droplets. The hydrochloric acid droplets fall onto the surfaces of the distillation tray (22) and the purification tray (11), and form a tension film on the surfaces of the tension bowl (151) and the vent (225). S4: During the movement of hydrochloric acid vapor, it encounters the tension membrane, allowing the hydrochloric acid vapor and hydrochloric acid droplets to exchange purity. S5: The hydrochloric acid liquid that condenses on the top of the shell (3) slides down the side wall of the shell (3) to the outlet pipe (31) and is discharged through the outlet pipe (31). The impurity liquid that falls to the bottom of the shell (3) is discharged through the impurity pipe (32).

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