A process for the recovery of hydrochloric acid

Abstract

The application belongs to the field of hydrochloric acid recycling, and particularly relates to a hydrochloric acid recycling and analyzing process. In the existing hydrochloric acid recycling process, the hydrochloric acid waste liquid is inconvenient to pretreat, thereby too many impurities affect the analyzing effect, and the water vapor is inconvenient to uniformly and quickly condense, and the hydrochloric acid recycling efficiency is low. The present application comprises a base, a first box and a second box are fixedly installed on the top of the base, a liquid inlet and a liquid outlet are respectively arranged on the top and one side of the first box, a steam outlet is arranged on the top of the first box, a filter plate is fixedly installed in the first box, and a condensing mechanism is arranged in the second box. In the use process, the hydrochloric acid waste liquid can be conveniently pretreated, thereby too many impurities can be avoided to affect the analyzing effect, the water vapor can be conveniently uniformly and quickly condensed, the hydrochloric acid recycling efficiency is improved, the structure is simple, and the application is convenient to use.

Description

Technical Field

[0001] The present invention relates to the technical field of hydrochloric acid recovery and utilization, and in particular to an analytical process for recovery and utilization of hydrochloric acid. Background Art

[0002] Hydrochloric acid is a key raw material in the chemical industry, widely used in industries such as chemical raw materials, dyes, pharmaceuticals, food, printing and dyeing, leather, sugar production, and metallurgy. It is also used in the regeneration of ion exchange resins and as a cleaning agent for electroplating and metal surfaces. Currently, there are three methods for treating hydrochloric acid wastewater and waste hydrochloric acid: roasting, extraction, and evaporation. The roasting method, primarily imported from abroad, is suitable for treating waste hydrochloric acid generated in the steel pickling industry and recovers a large amount of hydrochloric acid. However, it carries disadvantages such as secondary pollution, high investment, the need for high-energy fuels, technical difficulties, bulky equipment, and difficulties in management and maintenance. The extraction method uses an organic phase in a countercurrent extraction process, with the extract phase being recycled. However, this method is still relatively expensive and inconvenient to operate, making it less practical. The evaporation method, on the other hand, primarily consumes steam and heats and evaporates hydrochloric acid-containing wastewater (waste hydrochloric acid) to produce hydrochloric acid and a concentrated liquid phase. Its advantages are low investment and ease of operation.

[0003] Patent publication number CN216764374U discloses a device for recycling hydrochloric acid waste liquid. The device comprises a fixed member having a circular ring-shaped structure, four support legs welded to its bottom and arranged in a rectangular array, a processing tank welded to its inner bottom, a heating and reaction mechanism built into the processing tank, a discharge pipe welded to its bottom, a stop valve provided on the discharge pipe, and a collection mechanism provided on the top of the processing tank. This device for recycling hydrochloric acid waste liquid utilizes distillation and condensation to collect and recycle the hydrochloric acid in the hydrochloric acid waste liquid, effectively avoiding environmental pollution caused by direct discharge of the hydrochloric acid waste liquid. It also recovers hydrochloric acid from the hydrochloric acid waste liquid to a certain extent, effectively reducing the waste of hydrochloric acid resources and significantly improving the practicality of the device.

[0004] However, the above patent document is not convenient for pre-treating the hydrochloric acid waste liquid during use, which leads to excessive impurities affecting the analytical effect, and is not convenient for rapid and uniform condensation of water vapor, resulting in low hydrochloric acid recovery efficiency. Therefore, we propose a hydrochloric acid recovery and utilization analytical process to solve the above problems. Summary of the Invention

[0005] The present invention aims to solve the shortcomings of the prior art in that, during the hydrochloric acid recovery process, it is inconvenient to pretreat the hydrochloric acid waste liquid, which leads to excessive impurities affecting the analytical effect, and it is inconvenient to quickly and uniformly condense water vapor, resulting in low hydrochloric acid recovery efficiency. A hydrochloric acid recovery and analytical process is proposed.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] A hydrochloric acid recovery and utilization analytical process comprises the following steps:

[0008] S1: Prepare an analysis device, which includes a base, a first box body and a second box body fixedly mounted on the top of the base, a liquid inlet and a liquid drain port respectively provided on the top and one side of the first box body, a steam exhaust port provided on the top of the first box body, a filter plate fixedly mounted in the first box body, a condensation mechanism provided in the second box body, a packing layer fixedly mounted in the second box body, air inlets provided on both sides of the second box body, dustproof plates fixedly mounted in both air inlets, a mounting port provided on one side of the second box body, a shell fixedly mounted in the mounting port, a heat dissipation mechanism provided in the shell body, an electromagnetic heating plate fixedly mounted on the bottom inner wall of the first box body, and a mounting slot provided in the second box body;

[0009] S2: First, hydrochloric acid waste liquid is added into the first box through the liquid inlet. The filter plate can pre-treat the hydrochloric acid waste liquid and intercept and filter the impurities therein. The hydrochloric acid waste liquid can be heated by the electromagnetic heating plate until the volatile solute hydrogen chloride in the hydrochloric acid waste liquid is evaporated into a vapor state;

[0010] S3: Then, the vaporized hydrogen chloride is discharged to the condensing mechanism through the exhaust port. The condensing mechanism can condense the hydrogen chloride vapor and water vapor. The water vapor is condensed into liquid water. Then, the hydrogen chloride vapor and liquid water are mixed to obtain hydrochloric acid.

[0011] S4: Finally, the cooling water flows back to the packing layer, and the cooling water can be quickly cooled by the heat dissipation mechanism, which can effectively ensure the efficiency of hydrochloric acid analysis.

[0012] Preferably, a second through hole is opened on one side of the first box body and the second box body, and the same third rotating rod is rotatably installed in the two second through holes, a first sprocket is fixedly installed on the other end of the first rotating rod, and a second sprocket is fixedly installed on the outer side of the third rotating rod, and the same first chain is engaged with the first sprocket and the second sprocket.

[0013] Preferably, a fourth through hole is opened on one side of the second box body, and a second rotating shaft is rotatably installed in the fourth through hole. A fourth bevel gear is fixedly installed on one end of the second rotating shaft and the outer side of the second rotating rod, and a third bevel gear is fixedly installed on the other end of the third rotating rod, and the third bevel gear is meshed with the two fourth bevel gears.

[0014] Preferably, a third sprocket is fixedly mounted on the other end of the second rotating shaft and one end of the third rotating shaft, and the two third sprockets are meshed with the same second chain.

[0015] Preferably, a sealing plate is fixedly installed in the second box body, a through opening is opened on the sealing plate, a slide groove is opened on one side of the second box body, a connecting plate is slidably installed in the slide groove, a blocking block is fixedly installed on the connecting plate, and the blocking block cooperates with the through opening.

[0016] Preferably, a sliding hole is provided on the bottom inner wall of the mounting groove, the sliding hole is communicated with the sliding groove, a guide rod is slidably installed in the sliding hole, one end of the guide rod is fixedly connected to the outer side of the connecting plate, an eccentric wheel is fixedly installed on the outer side of the third rotating rod, the eccentric wheel cooperates with the guide rod, a spring is sleeved on the outer side of the guide rod, and both ends of the spring are fixedly connected to the top inner wall of the sliding groove and the outer side of the connecting plate respectively.

[0017] Preferably, the condensing mechanism includes a condensing coil, and the top and one side of the second box body are fixedly connected with a connecting pipe and a drain pipe respectively. The two ends of the condensing coil are fixedly connected with one end of the connecting pipe and the drain pipe respectively, and the other end of the connecting pipe is fixedly connected with the exhaust port.

[0018] Preferably, a fifth through hole is opened on one side of the shell, a third rotating shaft is rotatably installed in the fifth through hole, an impeller is fixedly installed on the outside of the third rotating shaft, a water pump is fixedly installed on the bottom inner wall of the second box body, a circulation pipe is fixedly installed on the second box body, and one end of the circulation pipe is fixedly connected to the output port of the water pump.

[0019] Preferably, a third through hole is provided on the top of the first box body, a first rotating shaft is rotatably installed in the third through hole, a second bevel gear is fixedly installed on the outside of the first rotating shaft, the first bevel gear is fixedly installed on one end of the third rotating rod, the first bevel gear is meshed with the second bevel gear, and a scraper is fixedly installed on one end of the first rotating shaft.

[0020] Preferably, first through holes are provided on both sides of the first box body and the top of the second box body, and the first rotating rod and the second rotating rod are rotatably installed in the three first through holes respectively. A motor is fixedly installed on one side of the first box body, and the output shaft of the motor is fixedly connected to one end of the first rotating rod, and multiple stirring blades are fixedly connected to the outer sides of the first rotating rod and the second rotating rod.

[0021] In the present invention, the beneficial effects of the analytical process for recycling hydrochloric acid are:

[0022] 1. In this solution, when the motor is turned on, the motor drives the first rotating rod to rotate, and the first rotating rod drives multiple stirring blades to rotate, so that the multiple stirring blades can stir the hydrochloric acid waste liquid, and the electromagnetic heating plate can heat the hydrochloric acid waste liquid evenly and quickly. At the same time, through the setting of the filter plate, the filter plate can filter out impurities in the hydrochloric acid waste liquid to avoid affecting the analysis effect.

[0023] 2. In this solution, when the first rotating rod rotates, the first sprocket drives the second sprocket to rotate through the first chain, the second sprocket drives the third rotating rod to rotate, the third bevel gear drives the two fourth bevel gears to rotate, and the second rotating rod drives multiple stirring blades to rotate. The multiple stirring blades can stir the cooling water, thereby making the steam in the condensing coil evenly and quickly condense, thereby improving the hydrochloric acid recovery efficiency.

[0024] 3. In this solution, when the fourth bevel gear rotates, the second shaft drives the third sprocket to rotate, and the two third sprockets are driven by the second chain, and then the third shaft drives the impeller to rotate. The suction force generated by the rotation of the impeller can make the air in the second box circulate quickly, thereby achieving the purpose of dissipating heat to the coolant and ensuring the condensation effect.

[0025] The present invention can facilitate pretreatment of hydrochloric acid waste liquid during use, thereby preventing excessive impurities from affecting the analysis effect, and is convenient for quickly and evenly condensing water vapor, thereby improving hydrochloric acid recovery efficiency. It has a simple structure and is easy to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a schematic structural diagram of the main view of an analytical process analytical device for hydrochloric acid recovery and utilization proposed by the present invention;

[0027] Figure 2 This is a schematic structural diagram of a side view of an analytical process analytical device for hydrochloric acid recovery and utilization proposed by the present invention;

[0028] Figure 3 A hydrochloric acid recovery and utilization analytical process proposed by the present invention Figure 1 A schematic diagram of the structure of the enlarged part A;

[0029] Figure 4 A hydrochloric acid recovery and utilization analytical process proposed by the present invention Figure 1 A schematic diagram of the structure of the enlarged portion B;

[0030] Figure 5 A hydrochloric acid recovery and utilization analytical process proposed by the present invention Figure 1 The enlarged structural diagram of part C in the middle;

[0031] Figure 6 A hydrochloric acid recovery and utilization analytical process proposed by the present invention Figure 1 Schematic diagram of the structure with the D part enlarged.

[0032] In the figure: 1. Base; 2. First housing; 3. Second housing; 4. Exhaust port; 5. Filter plate; 6. Electromagnetic heating plate; 7. Motor; 8. First rotating rod; 9. Stirring blade; 10. Sealing plate; 11. Packing layer; 12. Dustproof plate; 13. Housing; 14. Condensing coil; 15. Connecting pipe; 16. Drain pipe; 17. Water pump; 18. Circulation pipe; 19. First sprocket; 20. First chain; 21. Second sprocket ; 22. Third rotating rod; 23. Mounting groove; 24. First bevel gear; 25. Second bevel gear; 26. First rotating shaft; 27. Scraper; 28. Second rotating rod; 29. ​​Third bevel gear; 30. Fourth bevel gear; 31. Eccentric wheel; 32. Slide groove; 33. Connecting plate; 34. Guide rod; 35. Spring; 36. Second rotating shaft; 37. Third sprocket; 38. Second chain; 39. Third rotating shaft; 40. Impeller. DETAILED DESCRIPTION

[0033] The technical solutions in the embodiments of the present invention will be clearly and completely described 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 the embodiments.

[0034] Example 1

[0035] Reference Figure 1 and Figure 2 , a hydrochloric acid recovery and utilization analytical process, comprising the following steps:

[0036] S1: Prepare an analysis device, which includes a base 1. A first box body 2 and a second box body 3 are fixedly installed on the top of the base 1. A liquid inlet and a liquid drain port are respectively provided on the top and one side of the first box body 2. An exhaust port 4 is provided on the top of the first box body 2. A filter plate 5 is fixedly installed in the first box body 2. A condensation mechanism is provided in the second box body 3. The condensation mechanism includes a condensation coil 14. A connecting pipe 15 and a drain pipe 16 are fixedly connected to the top and one side of the second box body 3 respectively. Both ends of the condensation coil 14 are fixedly connected to one end of the connecting pipe 15 and the drain pipe 16 respectively, and the other end of the connecting pipe 15 is fixedly connected to the exhaust port 4. A packing layer 11 is fixedly installed in the second box body 3. Air inlets are provided on both sides of the second box body 3. Dustproof plates 12 are fixedly installed in the two air inlets. A mounting port is provided on one side of the second box body 3. A shell 13 is fixedly installed in the mounting port. A heat dissipation mechanism is provided in the shell 13. An electromagnetic heating plate 6 is fixedly installed on the inner wall of the bottom of the first box body 2. A mounting groove 23 is provided in the casing 3, and the other end of the second rotating shaft 36 and one end of the third rotating shaft 39 are fixedly installed with a third sprocket 37, and the two third sprockets 37 are meshed with the same second chain 38. A fifth through hole is provided on one side of the casing 13, and the third rotating shaft 39 is rotatably installed in the fifth through hole. An impeller 40 is fixedly installed on the outer side of the third rotating shaft 39. A water pump 17 is fixedly installed on the bottom inner wall of the second casing 3, and a circulation pipe 18 is fixedly installed on the second casing 3. One end of the circulation pipe 18 is fixedly connected to the output port of the water pump 17. First through holes are provided on both sides of the first casing 2 and the top of the second casing 3, and a first rotating rod 8 and a second rotating rod 28 are rotatably installed in the three first through holes respectively. A motor 7 is fixedly installed on one side of the first casing 2, and the output shaft of the motor 7 is fixedly connected to one end of the first rotating rod 8. A plurality of stirring blades 9 are fixedly connected to the outer sides of the first rotating rod 8 and the second rotating rod 28. When the motor 7 is turned on, the first rotating rod 8 can drive the plurality of stirring blades 9 to rotate;

[0037] S2: First, hydrochloric acid waste liquid is added into the first housing 2 through the liquid inlet. The filter plate 5 can pre-treat the hydrochloric acid waste liquid and intercept and filter the impurities therein. The electromagnetic heating plate 6 can heat the hydrochloric acid waste liquid until the volatile solute hydrogen chloride in the hydrochloric acid waste liquid is evaporated into a vapor state.

[0038] S3: Then, the vaporized hydrogen chloride is discharged to the condensing mechanism through the exhaust port 4. The condensing mechanism can condense the hydrogen chloride vapor and water vapor, and the water vapor is condensed into liquid water. Then, the hydrogen chloride vapor and liquid water are mixed to obtain hydrochloric acid;

[0039] S4: Finally, the cooling water flows back to the packing layer 11, and the cooling water can be quickly cooled by the heat dissipation mechanism, which can effectively ensure the efficiency of hydrochloric acid analysis.

[0040] Reference Figure 3A second through hole is opened on one side of the first box body 2 and the second box body 3, and the same third rotating rod 22 is rotatably installed in the two second through holes. The other end of the first rotating rod 8 is fixedly installed with a first sprocket 19, and the outer side of the third rotating rod 22 is fixedly installed with a second sprocket 21. The first sprocket 19 and the second sprocket 21 are meshed with the same first chain 20. When the first rotating rod 8 rotates, the first sprocket 19 can drive the second sprocket 21 to rotate through the first chain 20.

[0041] Reference Figure 4 A third through hole is provided on the top of the first box body 2, and a first rotating shaft 26 is rotatably installed in the third through hole. A second bevel gear 25 is fixedly installed on the outside of the first rotating shaft 26, and a first bevel gear 24 is fixedly installed on one end of the third rotating rod 22. The first bevel gear 24 is meshed with the second bevel gear 25. A scraper 27 is fixedly installed on one end of the first rotating shaft 26. When the third rotating rod 22 rotates, the first bevel gear 24 can drive the second bevel gear 25 to rotate.

[0042] Reference Figure 5 A fourth through hole is opened on one side of the second box body 3, and a second rotating shaft 36 is rotatably installed in the fourth through hole. One end of the second rotating shaft 36 and the outer side of the second rotating rod 28 are fixedly installed with a fourth bevel gear 30, and the other end of the third rotating rod 22 is fixedly installed with a third bevel gear 29. The third bevel gear 29 is engaged with the two fourth bevel gears 30. When the third rotating rod 22 rotates, the third bevel gear 29 can drive the two fourth bevel gears 30 to rotate.

[0043] Reference Figure 6 The cam 33 is fixed on the top of the cam 33 and the cam 33 is fixed on the top of the cam 33 so that the cam 33 can move in a straight line.

[0044] In this embodiment, when in use, the hydrochloric acid waste liquid is transported to the first box body 2 through the liquid inlet, the filter plate 5 can intercept and filter the impurities in the hydrochloric acid waste liquid, turn on the motor 7 and the electromagnetic heating plate 6, the motor 7 drives the first rotating rod 8 to rotate, the first rotating rod 8 drives the multiple stirring blades 9 to rotate, and then the electromagnetic heating plate 6 can evenly heat the hydrochloric acid waste liquid. After the hydrochloric acid waste liquid is heated for a certain period of time, the hydrogen chloride and water in the hydrochloric acid waste liquid evaporate together, and the evaporated steam can be discharged to the condensing coil 14 through the exhaust port 4 connecting pipe 15, and the coolant in the second box body 3 can Hydrogen and water vapor are condensed to obtain hydrochloric acid. At the same time, the first rotating rod 8 drives the first sprocket 19 to rotate. The first sprocket 19 drives the second sprocket 21 to rotate through the first chain 20. The second sprocket 21 drives the third rotating rod 22 to rotate. The third rotating rod 22 drives the first bevel gear 24 to rotate. The first bevel gear 24 drives the second bevel gear 25 to rotate. The second bevel gear 25 drives the first rotating shaft 26 to rotate. The first rotating shaft 26 drives the scraper 27 to rotate. The scraper 27 scrapes the impurities on the filter plate 5, thereby preventing the filter plate 5 from being blocked. At the same time, the third rotating rod 22 drives the third bevel gear The wheel 29 rotates, the third bevel gear 29 drives the two fourth bevel gears 30 to rotate, the fourth bevel gear 30 drives the second rotating rod 28 to rotate, the second rotating rod 28 drives the multiple stirring blades 9 to rotate, and the multiple stirring blades 9 stir the coolant, which can make the steam in the condensing coil 14 evenly exchange heat and improve the heat exchange efficiency. At the same time, the third rotating rod 22 drives the eccentric wheel 31 to rotate, the eccentric wheel 31 drives the guide rod 34 to move vertically downward, the guide rod 34 drives the connecting plate 33 to move vertically, and the connecting plate 33 stretches the spring 35. When the eccentric wheel 31 rotates to a certain position, the spring 35 can be deformed by the deformation force belt The movable connecting plate 33 is reset, and then the connecting plate 33 drives the blocking block to reciprocate to open and close the opening, and the coolant can flow back to the bottom of the second box body 3 through the opening. At the same time, the fourth bevel gear 30 drives the second rotating shaft 36 to rotate, and the second rotating shaft 36 drives the third sprocket 37 to rotate. The two third sprockets 37 are transmitted through the second chain 38, and the third sprocket 37 drives the third rotating shaft 39 to rotate. The third rotating shaft 39 drives the impeller 40 to rotate. The suction force generated by the rotation of the impeller 40 can make the air in the second box body 3 circulate quickly, thereby achieving the purpose of quickly dissipating heat to the coolant and ensuring the recovery efficiency of hydrochloric acid.

[0045] Example 2

[0046] The difference between this embodiment and the first embodiment is that a liquid level gauge is fixedly installed on the inner wall of the bottom of the second box body 3, and a controller and a warning light are fixedly installed on the outer side of the second box body 3. The liquid level gauge, the controller and the warning light are connected in sequence. The liquid level gauge can monitor the cooling water level in the second box body 3. When the cooling water level drops to a set threshold, the liquid level gauge sends an instruction to the controller, and the controller can control the warning light to light up, thereby reminding the staff to replenish the cooling water in time.

[0047] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A hydrochloric acid recovery and utilization analytical process, characterized in that: The following steps are involved: S1: Prepare an analysis device, the analysis device comprising a base (1), a first box (2) and a second box (3) are fixedly mounted on the top of the base (1), a liquid inlet and a liquid outlet are respectively provided on the top and one side of the first box (2), a steam exhaust port (4) is provided on the top of the first box (2), a filter plate (5) is fixedly mounted in the first box (2), a condensation mechanism is provided in the second box (3), a packing layer (11) is fixedly mounted in the second box (3), air inlets are provided on both sides of the second box (3), dustproof plates (12) are fixedly mounted in both air inlets, a mounting port is provided on one side of the second box (3), a shell (13) is fixedly mounted in the mounting port, a heat dissipation mechanism is provided in the shell (13), an electromagnetic heating plate (6) is fixedly mounted on the bottom inner wall of the first box (2), and a mounting groove (23) is provided in the second box (3); S2: First, hydrochloric acid waste liquid is added into the first box (2) through the liquid inlet, the filter plate (5) can pre-treat the hydrochloric acid waste liquid, intercept and filter the impurities therein, and the hydrochloric acid waste liquid can be heated by the electromagnetic heating plate (6) until the volatile solute hydrogen chloride in the hydrochloric acid waste liquid is evaporated into a vapor state; S3: Then, the vaporized hydrogen chloride is discharged to the condensing mechanism through the exhaust port (4). The condensing mechanism can condense the hydrogen chloride vapor and water vapor, and the water vapor is condensed into liquid water. Then, the hydrogen chloride vapor and the liquid water are mixed to obtain hydrochloric acid; S4: Finally, the cooling water flows back to the packing layer (11), and the cooling water can be quickly cooled by the heat dissipation mechanism, which can effectively ensure the efficiency of hydrochloric acid analysis; First through holes are provided on both sides of the first housing (2) and the top of the second housing (3), and a first rotating rod (8) and a second rotating rod (28) are rotatably mounted in the three first through holes respectively. A motor (7) is fixedly mounted on one side of the first housing (2), and the output shaft of the motor (7) is fixedly connected to one end of the first rotating rod (8). A plurality of stirring blades (9) are fixedly connected to the outer sides of the first rotating rod (8) and the second rotating rod (28); A second through hole is provided on one side of each of the first housing (2) and the second housing (3); a third rotating rod (22) is rotatably mounted in the two second through holes; a first sprocket (19) is fixedly mounted on the other end of the first rotating rod (8); a second sprocket (21) is fixedly mounted on the outer side of the third rotating rod (22); and a first chain (20) is meshed with the first sprocket (19) and the second sprocket (21); A third through hole is provided on the top of the first housing (2), a first rotating shaft (26) is rotatably mounted in the third through hole, a second bevel gear (25) is fixedly mounted on the outer side of the first rotating shaft (26), a first bevel gear (24) is fixedly mounted on one end of the third rotating rod (22), the first bevel gear (24) is meshed with the second bevel gear (25), and a scraper (27) is fixedly mounted on one end of the first rotating shaft (26).

2. A hydrochloric acid recovery and utilization analytical process according to claim 1, characterized in that, A fourth through hole is provided on one side of the second housing (3), a second rotating shaft (36) is rotatably mounted in the fourth through hole, a fourth bevel gear (30) is fixedly mounted on one end of the second rotating shaft (36) and on the outer side of the second rotating rod (28), a third bevel gear (29) is fixedly mounted on the other end of the third rotating rod (22), and the third bevel gear (29) is meshed with the two fourth bevel gears (30).

3. A hydrochloric acid recovery and utilization analytical process according to claim 2, characterized in that, A fifth through hole is provided on one side of the housing (13), a third rotating shaft (39) is rotatably mounted in the fifth through hole, an impeller (40) is fixedly mounted on the outer side of the third rotating shaft (39), a water pump (17) is fixedly mounted on the bottom inner wall of the second housing (3), a circulation pipe (18) is fixedly mounted on the second housing (3), and one end of the circulation pipe (18) is fixedly connected to the output port of the water pump (17).

4. A hydrochloric acid recovery and utilization analytical process according to claim 3, characterized in that, The other end of the second rotating shaft (36) and one end of the third rotating shaft (39) are both fixedly mounted with a third sprocket (37), and the two third sprockets (37) are meshed with the same second chain (38).

5. A hydrochloric acid recovery and utilization analytical process according to claim 4, characterized in that, The condensing mechanism comprises a condensing coil (14); the top and one side of the second box (3) are fixedly connected with a connecting pipe (15) and a drain pipe (16), respectively; the two ends of the condensing coil (14) are fixedly connected with one end of the connecting pipe (15) and the drain pipe (16), respectively; the other end of the connecting pipe (15) is fixedly connected with the exhaust port (4).

6. A hydrochloric acid recovery and utilization analytical process according to claim 5, characterized in that, A sealing plate (10) is fixedly installed in the second box body (3), and a through opening is provided on the sealing plate (10). A sliding groove (32) is provided on one side of the second box body (3), and a connecting plate (33) is slidably installed in the sliding groove (32). A blocking block is fixedly installed on the connecting plate (33), and the blocking block is matched with the through opening.

7. A hydrochloric acid recovery and utilization analytical process according to claim 6, characterized in that, A sliding hole is provided on the inner wall of the bottom of the mounting groove (23), which is communicated with the sliding groove (32). A guide rod (34) is slidably installed in the sliding hole. One end of the guide rod (34) is fixedly connected to the outer side of the connecting plate (33). An eccentric wheel (31) is fixedly installed on the outer side of the third rotating rod (22). The eccentric wheel (31) cooperates with the guide rod (34). A spring (35) is sleeved on the outer side of the guide rod (34). The two ends of the spring (35) are fixedly connected to the top inner wall of the sliding groove (32) and the outer side of the connecting plate (33) respectively.

Images