A distillation apparatus for concentrating hydrochloric acid

Abstract

This utility model relates to the field of hydrochloric acid distillation and purification technology, and discloses a distillation apparatus for hydrochloric acid concentration. The apparatus includes a base, an insulating shell fixedly connected to the top of the outer wall of the base, a distillation cylinder fixedly connected to the bottom of the inner wall of the insulating shell, heating wires fixedly connected to the periphery of the outer wall of the distillation cylinder, a rotating shaft fixedly connected to the bottom of the inner wall of the distillation cylinder, a stirring paddle rotatably connected to the top of the outer wall of the rotating shaft, a steam collection tank fixedly connected to the top of the outer wall of the steam collection tank, an accelerating spiral shaft fixedly connected to the top of the inner wall of the steam collection tank, and a conveying pipe connected to the top of the outer wall of the steam collection tank. In this utility model, the heating wires fixedly connected to the periphery of the outer wall of the distillation cylinder heat the inside of the distillation cylinder, thus achieving the evaporation and purification of hydrochloric acid. Simultaneously, the rotating shaft is fixedly connected to the bottom of the inner wall of the distillation cylinder, and the stirring paddle is fixedly connected to the top of the outer wall of the rotating shaft.

Description

Technical Field

[0001] This utility model relates to the field of hydrochloric acid distillation and purification technology, and in particular to a distillation apparatus for hydrochloric acid concentration. Background Technology

[0002] In chemical production, high-concentration hydrochloric acid is often required. In the preparation of some hydrochloric acid salts, even higher concentrations and higher purity hydrochloric acid are necessary to meet production demands. Industrial production often generates large quantities of low-concentration hydrochloric acid. Hydrochloric acid is highly corrosive, requiring high corrosion resistance from purification equipment. Some existing distillation equipment is easily corroded by hydrochloric acid due to unreasonable materials and structures, leading to shortened equipment lifespan and increased maintenance costs. Existing purification equipment has complex structures and complicated operating procedures, resulting in low work efficiency and a tendency for leaks, spills, and drips. The safety of employees is not effectively guaranteed, and there is also a risk of environmental pollution. Some distillation processes have high energy consumption. The rectification method requires the column equipment to have good tolerance to pressure and temperature, resulting in relatively high energy consumption. In actual production, it is difficult to achieve optimal economic benefits. Therefore, it is necessary to develop a high-efficiency, energy-saving, corrosion-resistant, and safe distillation device for hydrochloric acid concentration.

[0003] The distillation and concentration of hydrochloric acid requires a large amount of energy to maintain the temperature and pressure conditions required for distillation. Traditional equipment often suffers from insufficient heat utilization, with the heat released during condensation not being effectively recovered, resulting in high energy consumption per unit product. Furthermore, existing technologies still suffer from excessively low distillation rates. Currently, the market addresses this by adding plate and spiral plate heat exchangers between the condensation system and the feed preheating stage of the distillation unit. These heat exchangers introduce the high-temperature condensate from the top condenser and the heat released from the condensation of hydrochloric acid vapor into the heat exchanger to preheat the dilute hydrochloric acid feedstock entering the distillation column. However, this still does not solve the problem of excessively low distillation rates. The distillation process requires a continuous high-temperature and high-pressure environment; a low rate means longer equipment operating time for the same output, increasing energy consumption in heating and pressurization stages. Simultaneously, equipment depreciation and fixed labor costs are spread across fewer products, significantly increasing production costs. Utility Model Content

[0004] To overcome the above shortcomings, this utility model provides a distillation apparatus for hydrochloric acid concentration, which aims to improve the problem of excessively low distillation rate in the prior art.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a distillation apparatus for hydrochloric acid concentration, comprising a base, an insulating shell fixedly connected to the top of the outer wall of the base, a distillation cylinder fixedly connected to the bottom of the inner wall of the insulating shell, heating wires fixedly connected to the four sides of the outer wall of the distillation cylinder, a rotating shaft fixedly connected to the bottom of the inner wall of the distillation cylinder, a stirring paddle rotatably connected to the top of the outer wall of the rotating shaft, a steam collection tank fixedly connected to the top of the outer wall of the distillation cylinder, an accelerating spiral shaft fixedly connected to the top of the inner wall of the steam collection tank, a conveying pipe connected to the top of the outer wall of the steam collection tank, a condenser connected to the bottom of the outer wall of the conveying pipe, a cooling tank fixedly connected to the outer wall of the condenser, a circulation pipe connected to the front side of the outer wall of the cooling tank, a refrigeration pump connected to the middle of the outer wall of the circulation pipe, a collection bucket fixedly connected to the bottom of the outer wall of the condenser, and a waste gas treatment mechanism fixedly connected to the top of the outer wall of the base for treating waste gas.

[0006] As a further description of the above technical solution:

[0007] The waste gas treatment mechanism includes a first waste gas collection tank, the outer walls of which are fixedly connected to the top of the inner wall of a collection bucket. A first connecting pipe is connected to the top of the outer wall of the first waste gas collection tank, and a second waste gas collection tank is connected to the bottom of the outer wall of the first connecting pipe. A waste gas treatment bucket is fixedly connected to the outer walls of the second waste gas collection tank, and a second connecting pipe is connected to both sides of the outer wall of the waste gas treatment bucket. An alkaline solution bucket is connected to the bottom of the outer wall of the second connecting pipe, and a conveying frame is connected to the top of the outer wall of the second connecting pipe. A nozzle is connected to the inner side of the outer wall of the conveying frame, and an exhaust port is connected to the front side of the outer wall of the waste gas treatment bucket.

[0008] As a further description of the above technical solution:

[0009] The bottom of the outer wall of the distillation cylinder is connected to a second conveying pipe, and the top of the outer wall of the second conveying pipe is connected to a waste liquid treatment tank.

[0010] As a further description of the above technical solution:

[0011] A cover plate is fixedly connected to the top of the outer wall of the waste liquid treatment tank, and a motor is fixedly connected to the top of the outer wall of the cover plate.

[0012] As a further description of the above technical solution:

[0013] The output end of the motor is fixedly connected to a second rotating shaft, and the bottom of the outer wall of the second rotating shaft is fixedly connected to a second stirring paddle.

[0014] As a further description of the above technical solution:

[0015] The waste liquid treatment tank has a drain outlet on the left side of its outer wall, and a valve is connected to the upper side of the drain outlet's outer wall.

[0016] As a further description of the above technical solution:

[0017] The upper outer wall of the exhaust port is connected to valve two, and the upper outer wall of the connecting pipe two is connected to valve three.

[0018] As a further description of the above technical solution:

[0019] The bottom of the outer wall of the distillation cylinder is connected to a conveying pipe three, and a funnel is fixedly connected to the top of the outer wall of the conveying pipe three.

[0020] This utility model has the following beneficial effects:

[0021] 1. In this utility model, heating wires fixedly connected to the outer wall of the distillation cylinder heat the inside of the distillation cylinder, thereby achieving the evaporation and purification of hydrochloric acid. At the same time, a rotating shaft is fixedly connected to the bottom of the inner wall of the distillation cylinder, and a stirring paddle is fixedly connected to the top of the outer wall of the rotating shaft. Affected by the boiling of hydrochloric acid, the stirring paddle rotates, accelerating the purification rate. Meanwhile, the steam is collected by heating wires fixedly connected to the top of the inner wall of the distillation cylinder and transported to the condenser through a conveying pipe. The condensation effect is achieved by conveying the steam to the cooling tank and then using cold water. Finally, the steam is collected by a collection bucket connected to the bottom of the outer wall of the condenser.

[0022] 2. In this utility model, waste gas is collected in a collection tank through a waste gas collection tank 1, and transported to a waste gas treatment tank through a connecting pipe 1 and a waste gas collection tank 2. Alkaline solution tanks are fixedly connected to both sides of the outer wall of the waste gas treatment tank. A connecting pipe 2 is connected to the top of the outer wall of the alkaline solution tank. The alkaline solution in the alkaline solution tank is transported through the connecting pipe 2, and then transported by a conveyor frame connected to the top of the outer wall of the connecting pipe 2. Finally, it is evenly sprayed out by a nozzle connected to the inner side of the outer wall of the conveyor frame. The waste gas is treated by acid-base neutralization. Attached Figure Description

[0023] Figure 1 This is a front perspective view of a distillation apparatus for hydrochloric acid concentration proposed in this utility model;

[0024] Figure 2 This is a partial structural diagram of a distillation apparatus for hydrochloric acid concentration proposed in this utility model;

[0025] Figure 3 This is a partial structural exploded view of a distillation apparatus for hydrochloric acid concentration proposed in this utility model;

[0026] Figure 4 This is a partial structural diagram of a distillation apparatus for hydrochloric acid concentration proposed in this utility model;

[0027] Figure 5 This is a partial structural exploded view of a distillation apparatus for hydrochloric acid concentration proposed in this utility model;

[0028] Figure 6 This is a partial structural exploded view of a distillation apparatus for hydrochloric acid concentration proposed in this utility model.

[0029] Legend:

[0030] 1. Base; 2. Exhaust gas treatment mechanism; 201. Exhaust gas treatment tank; 202. Connecting pipe one; 203. Exhaust gas collection tank one; 204. Exhaust gas collection tank two; 205. Alkaline solution tank; 206. Connecting pipe two; 207. Conveying frame; 208. Nozzle; 209. Exhaust port; 3. Insulation shell; 4. Distillation cylinder; 5. Heating wire; 6. Steam collection tank; 7. Conveying pipe one; 8. Accelerating spiral shaft; 9. Rotating shaft one; 10. Stirring paddle one; 11. Cooling tank; 12. Condenser pipe; 13. Circulation pipe; 14. Collection tank; 15. Refrigeration pump; 16. Waste liquid treatment tank; 17. Cover plate; 18. Conveying pipe two; 19. Motor; 20. Rotating shaft two; 21. Stirring paddle two; 22. Drain outlet; 23. Valve one; 24. Valve two; 25. Valve three; 26. Conveying pipe three; 27. Funnel. Detailed Implementation

[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0032] Please see the appendix Figure 4 - Appendix Figure 6An embodiment of this utility model provides a distillation apparatus for hydrochloric acid concentration, comprising a base 1, an insulation shell 3 fixedly connected to the top of the outer wall of the base 1, a distillation cylinder 4 fixedly connected to the bottom of the inner wall of the insulation shell 3, heating wires 5 fixedly connected around the outer wall of the distillation cylinder 4, a rotating shaft 9 fixedly connected to the bottom of the inner wall of the distillation cylinder 4, a stirring paddle 10 rotatably connected to the top of the outer wall of the rotating shaft 9, a steam collection tank 6 fixedly connected to the top of the outer wall of the distillation cylinder 4, an accelerating spiral shaft 8 fixedly connected to the top of the inner wall of the steam collection tank 6, a conveying pipe 7 connected to the top of the outer wall of the steam collection tank 6, a condenser pipe 12 connected to the bottom of the outer wall of the conveying pipe 7, a cooling tank 11 fixedly connected to the outer wall of the condenser pipe 12, a circulation pipe 13 connected to the front side of the outer wall of the cooling tank 11, a refrigeration pump 15 connected to the middle of the outer wall of the circulation pipe 13, a collection bucket 14 fixedly connected to the bottom of the outer wall of the condenser pipe 12, and a waste gas treatment mechanism 2 fixedly connected to the top of the outer wall of the base 1 for treating waste gas.

[0033] Specifically, an insulation shell 3 is fixedly connected to the top of the outer wall of the base 1. This insulation shell 3 maintains a stable internal temperature. A distillation cylinder 4 is fixedly connected to the bottom of the inner wall of the insulation shell 3. The distillation cylinder 4 is used for the distillation process. A ring of heating wires 5 is evenly fixedly connected around the outer wall of the distillation cylinder 4. These heating wires 5 provide the heat required for the distillation process. A rotating shaft 9 is fixedly connected to the bottom of the inner wall of the distillation cylinder 4. A stirring paddle 10 is rotatably connected to the top of the outer wall of the rotating shaft 9. The stirring paddle 10 rotates under the drive of the rotating shaft 9 to evenly mix the substance in the distillation cylinder 4. A steam collection tank 6 is connected to the top of the outer wall of the distillation cylinder 4. The steam collection tank 6 is used to collect the steam generated during the distillation process. An accelerating spiral shaft 8 is fixedly connected to the top of the inner wall of the steam collection tank 6. The function of the accelerating spiral shaft 8 is... To accelerate the flow of steam and improve distillation efficiency, a conveying pipe 7 is connected to the top of the outer wall of the steam collection tank 6. A condenser pipe 12 is connected to the bottom of the outer wall of the conveying pipe 7. The condenser pipe 12 is used to condense the steam into liquid. A cooling tank 11 is fixedly connected to the outer wall of the condenser pipe 12. The cooling tank 11 is filled with cold water to cool the steam in the condenser pipe 12. A circulation pipe 13 is connected to the front of the outer wall of the cooling tank 11. The function of the circulation pipe 13 is to circulate the cooling water and maintain the cooling effect. A refrigeration pump 15 is connected to the middle of the outer wall of the circulation pipe 13. The function of the refrigeration pump 15 is to provide circulation power to ensure that the cold water circulates between the circulation pipe 13 and the cooling tank 11. A collection bucket 14 is fixedly connected to the bottom of the outer wall of the condenser pipe 12. The collection bucket 14 is used to collect the condensed liquid. The model of the refrigeration pump 15 is CSP38110XW.

[0034] Please see the appendix Figure 2 - Appendix Figure 4The exhaust gas treatment mechanism 2 includes an exhaust gas collection tank 203. The outer walls of the exhaust gas collection tank 203 are fixedly connected to the top of the inner wall of the collection tank 14. The top of the outer wall of the exhaust gas collection tank 203 is connected to a connecting pipe 202. The bottom of the outer wall of the connecting pipe 202 is connected to an exhaust gas collection tank 204. The outer walls of the exhaust gas collection tank 204 are fixedly connected to an exhaust gas treatment tank 201. The outer walls of the exhaust gas treatment tank 201 are connected to two connecting pipes 206. The bottom of the outer wall of the connecting pipe 206 is connected to an alkaline solution tank 205. The top of the outer wall of the connecting pipe 206 is connected to a conveying frame 207. The inner side of the outer wall of the conveying frame 207 is connected to a nozzle 208. The front side of the outer wall of the exhaust gas treatment tank 201 is connected to an exhaust port 209.

[0035] Specifically, the waste gas treatment mechanism 2 includes a waste gas collection trough 203 for collecting the generated waste gas. The outer wall of the waste gas collection trough 203 is fixedly connected to the top of the inner wall of the collection tank 14. The top of the outer wall of the waste gas collection trough 203 is connected to a connecting pipe 202, which mainly transmits the collected waste gas to the next treatment stage. The bottom of the outer wall of the connecting pipe 202 is connected to a waste gas collection trough 204. The outer wall of the waste gas collection trough 204 is fixedly connected to the waste gas treatment tank 201. The outer walls of the waste gas treatment tank 201 are connected to the waste gas collection trough 204. A connecting pipe 206 is connected to the outer bottom of the connecting pipe 206, which is connected to an alkaline solution tank 205. This tank contains an alkaline solution used to neutralize acidic substances in the waste gas. A conveyor frame 207 is connected to the outer top of the connecting pipe 206, and the conveyor frame 207 is connected to the inner side of the outer wall of the nozzle 208. Its function is to spray the alkaline solution into the waste gas to neutralize the acidic substances therein. An exhaust port 209 is connected to the front side of the outer wall of the waste gas treatment tank 201. The function of this exhaust port 209 is to discharge the treated waste gas into the external environment.

[0036] Please see the appendix Figure 3 - Appendix Figure 5 The bottom of the outer wall of the distillation cylinder 4 is connected to a second conveying pipe 18, the top of the outer wall of the second conveying pipe 18 is connected to a waste liquid treatment tank 16, the top of the outer wall of the waste liquid treatment tank 16 is fixedly connected to a cover plate 17, the top of the outer wall of the cover plate 17 is fixedly connected to a motor 19, the output end of the motor 19 is fixedly connected to a second rotating shaft 20, and the bottom of the outer wall of the second rotating shaft 20 is fixedly connected to a second stirring paddle 21.

[0037] Specifically, the distillation cylinder 4 has a conveying pipe 18 connected to the bottom of its outer wall. This conveying pipe 18 transports the waste liquid generated during the distillation process. The top of the outer wall of the conveying pipe 18 is connected to the waste liquid treatment tank 16, ensuring that the waste liquid can flow smoothly into the waste liquid treatment tank 16. A cover plate 17 is fixedly connected to the top of the outer wall of the waste liquid treatment tank 16. The cover plate 17 not only serves as a seal but also provides support for the equipment. A motor 19 is fixedly connected to the top of the outer wall of the cover plate 17. The output end of the motor 19 is fixedly connected to the rotating shaft 20, ensuring that the power output by the motor 19 can drive the rotating shaft 20. A stirring paddle 21 is fixedly connected to the bottom of the outer wall of the rotating shaft 20. The stirring paddle 21 is driven by the motor 19 to stir, thereby ensuring that the waste liquid can be fully mixed and treated during the treatment process. The model of the motor 19 is YY56-B.

[0038] Please see the appendix Figure 1 - Appendix Figure 3 The outer wall of the waste liquid treatment tank 16 is connected to the drain outlet 22 on the left side. The upper side of the outer wall of the drain outlet 22 is connected to the valve 1 23. The upper side of the outer wall of the exhaust outlet 209 is connected to the valve 24. The upper side of the outer wall of the connecting pipe 206 is connected to the valve 3 25. The bottom of the outer wall of the distillation cylinder 4 is connected to the conveying pipe 3 26. The top of the outer wall of the conveying pipe 3 26 is fixedly connected to the funnel 27.

[0039] Specifically, the outer left side of the waste liquid treatment tank 16 is connected to a drain outlet 22 for discharging waste liquid. The upper side of the outer wall of the drain outlet 22 is connected to a valve 23 for controlling the flow rate of waste liquid discharge. The upper side of the outer wall of the exhaust outlet 209 for discharging waste gas is connected to a valve 24 for adjusting the exhaust volume. The upper side of the outer wall of the connecting pipe 206 is connected to a valve 25 for controlling the flow direction and flow rate of fluid. The bottom of the outer wall of the distillation cylinder 4 for distillation treatment is connected to a conveying pipe 26 for conveying distillation products. The top of the outer wall of the conveying pipe 26 is fixedly connected to a funnel 27 for guiding fluid in, so as to ensure that the fluid enters the conveying pipe 26 smoothly.

[0040] Working Principle: A heat-insulating shell 3 is fixedly connected to the top of the outer wall of the base 1, and a distillation cylinder 4 is fixedly connected to the bottom of the outer wall of the heat-insulating shell 3. Heating wires 5, fixedly connected around the outer wall of the distillation cylinder 4, uniformly heat the interior of the cylinder 4, distilling the hydrochloric acid inside. The vapor evaporated from the hydrochloric acid is collected by a steam collection tank 6 fixedly connected to the top of the outer wall of the distillation cylinder 4. An accelerating spiral shaft 8 is fixedly connected to the top of the inner wall of the steam collection tank 6, increasing the steam flow rate. A conveying pipe 7 connects to the top of the outer wall of the steam collection tank 6, conveying the steam to a condenser pipe 12. A cooling tank 11 is fixedly connected to the outer wall of the condenser pipe 12. Cold water is conveyed through a circulation pipe 13 connected to the front of the outer wall of the cooling tank 11, condensing the steam. A refrigeration pump 15 connected to the middle of the outer wall of the circulation pipe 13 circulates and cools the steam, purifying it. The vapor is then collected by a collection bucket 14.

[0041] A waste gas collection trough 203 is fixedly connected to the top of the outer wall of the collection tank 14. A connecting pipe 202 is connected to the top of the outer wall of the waste gas collection trough 203. A waste gas collection trough 204 is connected to the bottom of the outer wall of the connecting pipe 202. Waste gas is transported to the waste gas treatment tank 201 through the connecting pipe 202 and the waste gas collection trough 204. Alkaline solution tanks 205 are fixedly connected to both sides of the outer wall of the waste gas treatment tank 201. Alkaline solution is transferred to the tank through the connecting pipe 206. The solution in solution tank 205 is transported to waste gas treatment tank 201. A conveying frame 207 is connected to the bottom of the outer wall of connecting pipe 206. A nozzle 208 is connected to the inner side of the outer wall of the conveying frame 207. The solution is evenly sprayed out by the nozzle 208 through the conveying frame 207 to neutralize the acidic gas inside the waste gas treatment tank 201. Finally, the solution is discharged through the exhaust port 209 connected to the front side of the outer wall of the waste gas treatment tank 201, thus achieving the treatment of waste gas.

[0042] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A distillation apparatus for concentrating hydrochloric acid, comprising a base (1), characterized in that: A heat-insulating shell (3) is fixedly connected to the top of the outer wall of the base (1). A distillation cylinder (4) is fixedly connected to the bottom of the inner wall of the heat-insulating shell (3). Heating wires (5) are fixedly connected to the four sides of the outer wall of the distillation cylinder (4). A rotating shaft (9) is fixedly connected to the bottom of the inner wall of the distillation cylinder (4). A stirring paddle (10) is rotatably connected to the top of the outer wall of the rotating shaft (9). A steam collection tank (6) is fixedly connected to the top of the outer wall of the distillation cylinder (4). An accelerating spiral shaft (8) is fixedly connected to the top of the inner wall of the steam collection tank (6). The top of the outer wall of the 6) is connected to a conveying pipe (7), the bottom of the outer wall of the conveying pipe (7) is connected to a condenser pipe (12), the outer wall of the condenser pipe (12) is fixedly connected to a cooling tank (11), the front side of the outer wall of the cooling tank (11) is connected to a circulation pipe (13), the middle of the outer wall of the circulation pipe (13) is connected to a refrigeration pump (15), the bottom of the outer wall of the condenser pipe (12) is fixedly connected to a collection bucket (14), the top of the outer wall of the base (1) is fixedly connected to a waste gas treatment mechanism (2), and the waste gas treatment mechanism (2) is used to treat waste gas.

2. The distillation apparatus for hydrochloric acid concentration according to claim 1, characterized in that: The waste gas treatment mechanism (2) includes a first waste gas collection tank (203), the outer walls of the first waste gas collection tank (203) are fixedly connected to the top of the inner wall of the collection bucket (14), the top of the outer wall of the first waste gas collection tank (203) is connected to a first connecting pipe (202), the bottom of the outer wall of the first connecting pipe (202) is connected to a second waste gas collection tank (204), the outer walls of the second waste gas collection tank (204) are fixedly connected to a waste gas treatment bucket (201), the outer walls of the waste gas treatment bucket (201) are connected to two sides of the outer wall of the waste gas treatment bucket (201), the bottom of the outer wall of the second connecting pipe (206) is connected to an alkaline solution bucket (205), the top of the outer wall of the second connecting pipe (206) is connected to a conveyor frame (207), the inner side of the outer wall of the conveyor frame (207) is connected to a nozzle (208), and the front side of the outer wall of the waste gas treatment bucket (201) is connected to an exhaust port (209).

3. The distillation apparatus for concentrating hydrochloric acid according to claim 1, characterized in that: The bottom of the outer wall of the distillation cylinder (4) is connected to a second conveying pipe (18), and the top of the outer wall of the second conveying pipe (18) is connected to a waste liquid treatment tank (16).

4. The distillation apparatus for hydrochloric acid concentration according to claim 3, characterized in that: The top of the outer wall of the waste liquid treatment tank (16) is fixedly connected to a cover plate (17), and the top of the outer wall of the cover plate (17) is fixedly connected to a motor (19).

5. The distillation apparatus for hydrochloric acid concentration according to claim 4, characterized in that: The output end of the motor (19) is fixedly connected to a rotating shaft (20), and the bottom of the outer wall of the rotating shaft (20) is fixedly connected to a stirring paddle (21).

6. The distillation apparatus for concentrating hydrochloric acid according to claim 4, characterized in that: The waste liquid treatment tank (16) has a drain outlet (22) connected to the left side of its outer wall, and a valve (23) is connected to the upper side of the outer wall of the drain outlet (22).

7. A distillation apparatus for concentrating hydrochloric acid according to claim 2, characterized in that: The upper outer wall of the exhaust port (209) is connected to valve two (24), and the upper outer wall of the connecting pipe two (206) is connected to valve three (25).

8. The distillation apparatus for concentrating hydrochloric acid according to claim 1, characterized in that: The bottom of the outer wall of the distillation cylinder (4) is connected to a conveying pipe three (26), and a funnel (27) is fixedly connected to the top of the outer wall of the conveying pipe three (26).

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