Full-automatic pretreatment system for recycling triethylamine hydrochloride wastewater

Abstract

The invention discloses a full-automatic pretreatment system for recycling triethylamine hydrochloride wastewater, and belongs to the field of triethylamine hydrochloride wastewater treatment.The full-automatic pretreatment system comprises an activated carbon powder bin, a batching tank, an intermediate tank, a first spiral tube type reactor and a second spiral tube type reactor, and a star-shaped unloader is arranged at the bottom of the activated carbon powder bin; a filtering assembly used for filtering activated carbon powder is arranged between the batching tank and the intermediate tank, the intermediate tank is communicated with a first spiral tubular reactor through a pipeline, and the first spiral tubular reactor is communicated with a second spiral tubular reactor through a pipeline. A pipeline II for conveying hydrochloric acid into the spiral tubular reactor I is arranged on the spiral tubular reactor I, and a pipeline III for discharging a pretreated sodium chloride solution into the MVR system is arranged on the spiral tubular reactor II. The MVR system has the advantages that enrichment of carbonate and organic matter solutions in the MVR system is reduced, the boiling point of the solutions is increased, sufficient steam cannot be vaporized at an inlet of the steam compressor, and circulating operation cannot be achieved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of triethylamine hydrochloride wastewater treatment, and in particular to a full-automatic pretreatment system for recycling triethylamine hydrochloride wastewater. BACKGROUND

[0002] The main application of vinylene carbonate is lithium battery electrolyte additive, accounting for more than 90%, as a key film-forming additive, it can form a dense and stable SEI film on the electrode surface, inhibit the decomposition of electrolyte, improve the cycle life, rate performance and safety of the battery, adapt to lithium ion battery, lithium-sulfur battery, sodium ion battery, etc., and the application products cover new energy vehicle power battery, consumer electronic battery such as mobile phone / laptop, energy storage battery for energy storage power station. The by-product of vinylene carbonate synthesis is triethylamine hydrochloride, which reacts with sodium hydroxide to form triethylamine and sodium chloride aqueous solution, which is converted into sodium chloride solution meeting the MVR feeding requirements after being treated by the process system. Sodium chloride can be used as a by-product, and the sewage is discharged after being treated by the sewage station.

[0003] Many side reactions occur during the synthesis of vinylene carbonate, resulting in a large amount of carbonate and a small amount of organic matter in the sodium chloride solution. Without pretreatment, the solution directly enters the MVR system, which can cause the enrichment of carbonate and organic matter solution in the MVR system, resulting in an increase in the boiling point of the solution, and the inlet of the steam compressor cannot vaporize enough steam, thereby causing the steam compressor to fail to operate in a cycle. SUMMARY

[0004] In order to improve the enrichment of carbonate and organic matter solution in the MVR system, resulting in an increase in the boiling point of the solution, and the inlet of the steam compressor cannot vaporize enough steam, thereby causing the steam compressor to fail to operate in a cycle, the present application provides a full-automatic pretreatment system for recycling triethylamine hydrochloride wastewater.

[0005] The full-automatic pretreatment system for recycling triethylamine hydrochloride wastewater provided by the present application adopts the following technical solution: A fully automated pretreatment system for recovering triethylamine hydrochloride wastewater includes an activated carbon powder silo, a mixing tank, an intermediate tank, a spiral tube reactor I, and a spiral tube reactor II. A star-shaped discharge device is installed at the bottom of the activated carbon powder silo. A feeding assembly for conveying activated carbon powder into the mixing tank is installed at the bottom of the star-shaped discharge device. A pipe I for conveying sodium chloride solution into the mixing tank is installed on the mixing tank. A filter assembly for filtering activated carbon powder is installed between the mixing tank and the intermediate tank. The intermediate tank is connected to the spiral tube reactor I via a pipeline. The spiral tube reactor I is connected to the spiral tube reactor II via a pipeline. A pipe II for conveying hydrochloric acid into the spiral tube reactor I is installed on the spiral tube reactor I. A pipe III for discharging the pretreated sodium chloride solution into the MVR system is installed on the spiral tube reactor II.

[0006] By adopting the above technical solution, pipeline 1 transports sodium chloride solution to the mixing tank, and activated carbon powder is poured into the activated carbon powder silo. Then, the activated carbon powder is transported to the feeding assembly through a rotary valve. The feeding assembly transports the activated carbon powder to the mixing tank, allowing the activated carbon powder to adsorb the organic matter in the sodium chloride solution in the mixing tank. When the sodium chloride solution in the mixing tank is transported to the intermediate tank, the activated carbon powder in the sodium chloride solution is filtered out by the filter assembly. The sodium chloride solution in the intermediate tank is transported to the spiral tube reactor 1 through pipeline. Then, hydrochloric acid is transported to the spiral tube reactor 1 through pipeline 2 to eliminate carbonate ions in the sodium chloride solution. Next, the sodium chloride solution in the spiral tube reactor 1 flows into the spiral tube reactor 2 through pipeline. Finally, the pretreated sodium chloride solution is discharged into the MVR system through pipeline 3, thereby reducing the accumulation of carbonate ions and organic matter in the solution within the MVR system, which could lead to an increase in the boiling point of the solution and prevent the steam compressor inlet from vaporizing sufficient steam and thus failing to circulate.

[0007] Preferably, the feeding assembly includes a water jet degasser, the bottom of the star-shaped unloader is connected to the top of the water jet degasser via a pipeline, the outlet pipeline of the water jet degasser adopts a spiral blade structure, the outlet pipeline of the water jet degasser is inserted into the mixing tank, a circulation pump is provided on one side of the mixing tank, the circulation pump is connected to the mixing tank and the water jet degasser via a pipeline, and the sodium chloride solution in the mixing tank is drawn into the water jet degasser through the circulation pump.

[0008] By adopting the above technical solution, activated carbon powder is transported to the water jet aerator. The circulating pump draws the sodium chloride solution in the mixing tank into the water jet aerator. The outlet pipeline of the water jet aerator adopts a spiral blade structure, which forces the activated carbon powder to come into contact with the sodium chloride solution. This allows the activated carbon powder to absorb enough water and be evenly suspended in the mixing tank to absorb the organic matter in the sodium chloride solution, ensuring the effectiveness of the activated carbon powder in absorbing organic matter.

[0009] Preferably, a gas delivery pipe is provided on the pipeline connecting the rotary valve and the water jet pump, and a steam heater is provided on the gas delivery pipe.

[0010] By adopting the above technical solution, the gas in the gas pipeline is heated by a steam heater, so that the activated carbon powder is transported by high-temperature gas, thereby reducing the possibility that the activated carbon powder will not be able to flow after absorbing moisture.

[0011] Preferably, a gas thermometer is installed on the gas pipeline, and the gas thermometer is located on the side of the steam heater near the water jet pump.

[0012] By adopting the above technical solution, a gas thermometer is installed on the gas pipeline, so that the gas thermometer can detect the temperature inside the gas pipeline in real time.

[0013] Preferably, the top of the mixing tank is provided with a vent pipe, and the vent pipe is connected to the mixing tank.

[0014] By adopting the above technical solution, when the water jet pump delivers the mixed conveying gas to the mixing tank, it is convenient for the gas in the mixing tank to be discharged from the vent pipe.

[0015] Preferably, the filtration assembly includes a plate and frame filter press one and a plate and frame filter press two. A transfer pump one is provided between the batching tank and the plate and frame filter press one and the plate and frame filter press two. The transfer pump one is connected to the batching tank and the plate and frame filter press one and the plate and frame filter press two respectively through pipelines.

[0016] By adopting the above technical solution, the sodium chloride solution in the mixing tank is transported through pipelines to plate and frame filter press one and plate and frame filter press two, thereby filtering out the activated carbon powder in the sodium chloride solution by plate and frame filter press one and plate and frame filter press two.

[0017] Preferably, the upper part of the mixing tank is connected to a calcium chloride tank via a pipeline.

[0018] By adopting the above technical solution, an appropriate amount of calcium chloride is transported to the batching tank through a pipeline via a calcium chloride tank, so that the calcium chloride reacts with some of the carbonate ions in the sodium chloride solution to generate calcium carbonate. When the sodium chloride solution passes through plate and frame filter press one and plate and frame filter press two, the calcium carbonate forms a filter cake layer with smaller pores during filtration in plate and frame filter press one and plate and frame filter press two, thereby enhancing the filtration effect.

[0019] Preferably, the spiral tube reactor is provided with a water supply pipe and a water return pipe.

[0020] By adopting the above technical solution, by setting a water supply pipe and a return water pipe on the spiral tube reactor, water is circulated inside the spiral tube reactor, which facilitates the control of the temperature inside the spiral tube reactor.

[0021] Preferably, a fourth pipe for conveying defoamer is connected to the third pipe, and the fourth pipe is connected to the third pipe.

[0022] By adopting the above technical solution, the sodium chloride solution will produce foam after being mixed with hydrochloric acid. Defoamer is then transported from pipeline four to pipeline three, thereby reducing the generation of foam in the sodium chloride solution.

[0023] In summary, this application includes at least one of the following beneficial technical effects: 1. Pipeline 1 delivers sodium chloride solution to the mixing tank. Activated carbon powder is poured into the activated carbon powder silo and then conveyed to the feeding assembly via a rotary valve. The feeding assembly then delivers the activated carbon powder to the mixing tank, allowing the activated carbon powder to adsorb organic matter in the sodium chloride solution. When the sodium chloride solution in the mixing tank is conveyed to the intermediate tank, the activated carbon powder is filtered out by the filter assembly. The sodium chloride solution in the intermediate tank is then conveyed to the spiral tube reactor 1 via pipeline. Then, hydrochloric acid is conveyed to the spiral tube reactor 1 via pipeline 2 to eliminate carbonate ions in the sodium chloride solution. Next, the sodium chloride solution in the spiral tube reactor 1 flows into the spiral tube reactor 2 via pipeline. Finally, the pretreated sodium chloride solution is discharged into the MVR system via pipeline 3, thereby reducing the accumulation of carbonate ions and organic matter in the MVR system, which could lead to an increase in the boiling point of the solution and prevent the steam compressor inlet from vaporizing sufficient steam, thus hindering the circulation process. 2. The activated carbon powder is delivered to the water jet aerator. The circulating pump draws the sodium chloride solution from the mixing tank into the water jet aerator. The outlet pipeline of the water jet aerator adopts a spiral blade structure to force the activated carbon powder to come into contact with the sodium chloride solution. This allows the activated carbon powder to absorb enough water and be evenly suspended in the mixing tank to absorb the organic matter in the sodium chloride solution, ensuring the effective absorption of organic matter by the activated carbon powder. 3. An appropriate amount of calcium chloride is transported to the batching tank through a pipeline via a calcium chloride tank, where it reacts with some of the carbonate ions in the sodium chloride solution to form calcium carbonate. When the sodium chloride solution passes through plate and frame filter press one and plate and frame filter press two, the calcium carbonate forms a filter cake layer with smaller pores during filtration in plate and frame filter press one and plate and frame filter press two, thereby enhancing the filtration effect. Attached Figure Description

[0024] Figure 1 This is a process flow diagram of a fully automated pretreatment system for recovering triethylamine hydrochloride wastewater according to an embodiment of this application.

[0025] Attached reference numerals: 1. Batching tank; 11. Pipeline 1; 12. Flow meter 1; 13. Control valve 1; 14. Level gauge 1; 2. Activated carbon powder silo; 21. Weighing module; 22. Rotary rotary valve; 23. Water jet ejector; 24. Circulating pump; 25. Vent pipe; 3. Gas pipeline; 31. Steam heater; 32. Inlet pipe; 33. Pipeline 5; 34. Flow meter 2; 35. Control valve 2; 36. Control valve 3; 37. Gas thermometer; 4. Calcium chloride tank; 41. Flow meter 3; 42. Control valve 4; 43. Level gauge 3; 5. Plate and frame filter press 1; 51. Plate and frame filter press 2; 52. Transfer pump 1; 53. Valve 1; 54. Valve 2; 55. 6. Pressure gauge; 6. Intermediate tank; 61. Level gauge II; 62. Transfer pump II; 63. Flow meter IV; 64. Control valve V; 7. Spiral reactor I; 71. Pipeline II; 72. Flow meter V; 73. Control valve VI; 74. Water supply pipe I; 75. Water return pipe I; 76. Control valve VII; 77. Thermometer I; 78. Spiral reactor II; 8. pH meter I; 81. Flow meter VI; 82. Thermometer II; 83. Water supply pipe II; 84. Water return pipe II; 85. Control valve VIII; 86. Pipeline VI; 87. Flow meter VII; 88. Control valve IX; 9. Pipeline III; 91. pH meter II; 92. Pipeline IV; 93. Flow meter VIII; 94. Control valve X. Detailed Implementation

[0026] The following is in conjunction with the appendix Figure 1 This application will be described in further detail.

[0027] This application discloses a fully automated pretreatment system for recovering triethylamine hydrochloride wastewater. Reference Figure 1A fully automated pretreatment system for recovering triethylamine hydrochloride wastewater includes an activated carbon powder silo 2, a batching tank 1, an intermediate tank 6, a spiral tube reactor 7, and a spiral tube reactor 2 78. The batching tank 1 is equipped with a pipe 11 for supplying sodium chloride solution into it. A flow meter 12 and a regulating valve 13 are fixed to the pipe 11, and both are configured for automatic control. A level gauge 14 is installed on the batching tank 1. The level gauge 14 and the flow meter 12 are also configured for automatic control; when the liquid level in the batching tank 1 exceeds 70%, the flow meter 12 reduces the feed rate.

[0028] Reference Figure 1 A weighing module 21 is installed on the activated carbon powder silo 2, and a rotary valve 22 is installed at the bottom of the activated carbon powder silo 2. The discharge volume of the rotary valve 22 is proportional to the flow rate of the sodium chloride solution feed meter 12. The set value of the flow rate meter 12 is proportional to the load-bearing module on the activated carbon powder silo 2. The discharge port of the rotary valve 22 is connected to a water jet vacuum pump 23 via a pipeline. The pipeline of the discharge port of the rotary valve 22 is connected to the top of the water jet vacuum pump 23. The outlet pipeline of the water jet vacuum pump 23 adopts a spiral blade structure and is inserted into the mixing tank 1. A circulation pump 24 is installed on one side of the mixing tank 1. The circulation pump 24 is connected to the mixing tank 1 and the water jet vacuum pump via a pipeline. The sodium chloride solution in the mixing tank 1 is drawn into the water jet vacuum pump 23 through the circulation pump 24. The top of the mixing tank 1 is fixed with a vent pipe 25, which is connected to the mixing tank 1.

[0029] Reference Figure 1 A gas delivery pipe 3 is fixedly connected to the pipeline connecting the rotary valve 22 and the water jet ejector 23. The gas delivery pipe 3 is connected to the pipeline connecting the rotary valve 22 and the water jet ejector 23. A steam heater 31 is installed on the gas delivery pipe 3. An inlet pipe 32 and a steam inflow pipe 33 are fixedly connected to the steam heater 31. A regulating valve 36 is fixedly installed on the inlet pipe 32 to control the steam flow. A flow meter 34 and a regulating valve 35 are fixedly installed on the gas delivery pipe 3. The flow meter 34 and regulating valve 35 are located on the side of the steam heater 31 furthest from the water jet ejector 23, and the flow meter 34 is located on the side of the regulating valve 35 furthest from the steam heater 31. A gas thermometer 37 is fixedly installed on the gas delivery pipe 3. The gas thermometer 37 is located on the side of the steam heater 31 furthest from the regulating valve 35, and its set value is 105°C.

[0030] Reference Figure 1A calcium chloride tank 4 is installed above the mixing tank 1. A level gauge 43 is fixed on the outer circumference of the calcium chloride tank 4. The calcium chloride tank 4 is connected to the mixing tank 1 through a pipeline. A flow meter 41 and a regulating valve 42 are fixed on the pipeline connecting the calcium chloride tank 4 and the mixing tank 1. The flow meter 41 and the regulating valve 42 are set to automatic control. The set value of the flow meter 41 is directly proportional to the set value of the flow meter 12.

[0031] Reference Figure 1 A plate and frame filter press 51 and a plate and frame filter press 21 are installed between the batching tank 1 and the intermediate tank 6. The batching tank 1 is connected to the plate and frame filter press 51 and the plate and frame filter press 21 via pipelines. A transfer pump 52 is installed on the pipelines between the batching tank 1 and the plate and frame filter press 51 and the plate and frame filter press 21. The transfer pump 52 is used to transfer the sodium chloride solution in the batching tank 1 to the plate and frame filter press 51 and the plate and frame filter press 21. Valves 1 (53) and 2 (54) are fixed on the pipelines that supply sodium chloride solution to plate and frame filter press 5 and plate and frame filter press 2 (51). Pressure gauges 55 are fixed on the pipelines connecting the mixing tank 1 to the plate and frame filter press 5 and plate and frame filter press 2 (51). When the pressure reaches 1.3 MPa, the system automatically cuts off the feed to the plate and frame filter press 5 and plate and frame filter press 2 (51), closes valves 1 (53) and 2 (54), and allows the cut-off plate and frame filter press 5 and plate and frame filter press 2 (51) to perform automatic drying and unloading operations.

[0032] Reference Figure 1 Plate and frame filter press 51 and plate and frame filter press 21 are connected to the top of intermediate tank 6 via pipelines. A level gauge 261 is fixed on intermediate tank 6. Intermediate tank 6 is connected to spiral tube reactor 7 via pipelines. A transfer pump 262, a flow meter 463, and a regulating valve 564 are sequentially installed on the pipeline connecting intermediate tank 6 and spiral tube reactor 7. A pipe 271 for conveying hydrochloric acid into spiral tube reactor 7 is fixed to the outer circumference of spiral tube reactor 7. A flow meter 572 and a regulating valve 66 are fixed to the outer circumference of pipe 271. The setpoint of flow meter 572 is directly proportional to the setpoint of flow meter 12. A water supply pipe 74 is fixed to the bottom end of the spiral tube reactor 7, and a return water pipe 75 is fixed to the top end of the spiral tube reactor 7. The water supply pipe 74 and the return water pipe 75 are respectively connected to the spiral tube reactor 7. A regulating valve 76 is fixed to the outer circumference of the return water pipe 75, and a thermometer 77 for monitoring the temperature inside the spiral tube reactor 7 is fixed to the outer circumference of the spiral tube reactor 7. The water outflow rate of the return water pipe 75 is controlled by controlling the regulating valve 76, thereby controlling the temperature of the thermometer.

[0033] Reference Figure 1Helical reactor 7 is connected to helical reactor 2 78 via a pipeline. A pH meter 8 and a flow meter 81 are fixed on the pipeline connecting helical reactor 7 and helical reactor 2 78. The pH meter 8 displays the pH value of the solution after acid washing in real time. The normal pH range is 3-4. When the pH value exceeds this range, the system will correct the direct proportional relationship between flow meters 72 and 63. Flow meter 81 is used to calculate the sum of the flow rates of flow meters 72 and 12. When the sum of the flow rates deviates significantly, the system will automatically alarm, and the operator needs to confirm whether the instruments are malfunctioning.

[0034] Reference Figure 1 A thermometer 282 for monitoring the temperature inside the spiral tube reactor 278 is fixed on the spiral tube reactor 278. A water supply pipe 283 and a water return pipe 284 are fixed to the bottom and top of the spiral tube reactor 278, respectively, and are connected to the spiral tube reactor. A regulating valve 85 is fixed to the outer circumference of the water return pipe 284, which controls the temperature of the thermometer on the spiral tube reactor 278. A pipe 6 86 for supplying sodium hydroxide solution into the spiral tube reactor 278 is fixed to the outer circumference of the spiral tube reactor 278. A flow meter 7 87 and a control valve 9 88 are fixed to the outer circumference of the pipe 6 86, and the flow meter 7 87 and the control valve 9 88 are set to automatic control. The sodium hydroxide solution is supplied to the spiral tube reactor 278 through the pipe 6 86 to adjust the pH value of the sodium chloride solution inside the spiral tube reactor 278, thereby reducing the possibility of excessively high pH value of the sodium chloride solution corroding downstream system equipment.

[0035] Reference Figure 1 The outer circumference of the spiral reactor 278 is fixed with a pipe 39 for discharging the pretreated sodium chloride solution into the MVR system. A pH meter 291 is fixed to the outer circumference of pipe 39. The set value of flow meter 787 is inversely proportional to the pH meter 291, with a normal pH range of 7-8. A pipe 492 for conveying defoamer into pipe 39 is fixed to the outer circumference of pipe 39. Pipe 492 is connected to pipe 39. A flow meter 893 and a regulating valve 1094 are fixed to the outer circumference of pipe 492. Flow meter 893 and regulating valve 1094 are set for automatic control, and flow meter 893 is set to a direct proportional relationship with flow meter 681.

[0036] The implementation principle of a fully automatic pretreatment system for recovering triethylamine hydrochloride wastewater according to an embodiment of this application is as follows: Sodium chloride solution is transported to the mixing tank 1 through pipeline 11, activated carbon powder is poured into the activated carbon powder silo 2, and activated carbon powder is transported to the water jet aerator 23 through the gas transmission pipeline 3 using high-temperature gas. The pipeline from the outlet of the water jet aerator 23 to the mixing tank 1 adopts a spiral blade structure, which forces the activated carbon powder to contact the sodium chloride solution. The activated carbon powder can absorb enough water and is evenly suspended in the mixing tank 1 to absorb organic matter, ensuring the absorption effect of organic matter.

[0037] Then, the calcium chloride tank 4 transports the sodium chloride solution to the mixing tank 1 via pipeline. In the mixing tank 1, some of the carbonate ions in the sodium chloride solution react with the calcium chloride to form calcium carbonate. Then, the sodium chloride solution in the mixing tank 1 is transported to the plate and frame filter press 5 and the plate and frame filter press 2 51 via the transfer pump 52. When the calcium carbonate passes through the plate and frame filter press 5 and the plate and frame filter press 2 51, it forms a filter cake layer with smaller pores, enhancing the filtration effect of the plate and frame filter press 5 and the plate and frame filter press 2 51. After the plate and frame filter press 5 and the plate and frame filter press 2 51 filter out the activated carbon powder from the sodium chloride liquid, the solution is then... The filtered sodium chloride solution is transported to intermediate tank 6 via pipeline. Then, pump 62 transfers the sodium chloride solution from intermediate tank 6 to spiral tubular reactor 7. Hydrochloric acid is then transported to spiral tubular reactor 7 via pipeline 71 to eliminate carbonate ions in the sodium chloride solution. Subsequently, the sodium chloride solution flows through pipeline into spiral tubular reactor 78. Next, sodium hydroxide solution is transported to spiral tubular reactor 78 via pipeline 86 to adjust the pH value of the sodium chloride solution, reducing the possibility of high pH levels corroding downstream systems. Then, defoamer is transported to pipeline 9 via pipeline 92 to eliminate foam in the sodium chloride solution in pipeline 9. Finally, the sodium chloride solution, after passing through the defoamer, is discharged into the MVR system via pipeline 9. By eliminating organic matter and carbonate ions in the sodium chloride solution, the accumulation of carbonate and organic matter in the MVR system is reduced, which could cause the solution boiling point to rise and prevent the steam compressor inlet from vaporizing sufficient steam, thus hindering circulation.

[0038] The above are all preferred embodiments of this application and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A fully automated pretreatment system for recovering triethylamine hydrochloride wastewater, characterized in that: The reactor includes an activated carbon powder silo (2), a mixing tank (1), an intermediate tank (6), a spiral tube reactor one (7), and a spiral tube reactor two (78). A star-shaped discharger (22) is installed at the bottom of the activated carbon powder silo (2). A feeding assembly for conveying activated carbon powder into the mixing tank (1) is installed at the bottom of the star-shaped discharger (22). A pipe one (11) for conveying sodium chloride solution into the mixing tank (1) is installed on the mixing tank (1). The mixing tank (1) and the intermediate tank (6) are connected... A filter assembly for filtering activated carbon powder is provided in the middle tank (6). The intermediate tank (6) is connected to the first spiral reactor (7) through a pipeline. The first spiral reactor (7) is connected to the second spiral reactor (78) through a pipeline. The first spiral reactor (7) is provided with a second pipeline (71) for conveying hydrochloric acid into the first spiral reactor (7). The second spiral reactor (78) is provided with a third pipeline (9) for discharging pretreated sodium chloride solution into the MVR system.

2. The fully automated pretreatment system for recovering triethylamine hydrochloride wastewater according to claim 1, characterized in that: The feeding assembly includes a water jet degasser (23). The bottom of the star-shaped unloader (22) is connected to the top of the water jet degasser (23) via a pipeline. The outlet pipeline of the water jet degasser (23) adopts a spiral blade structure. The outlet pipeline of the water jet degasser (23) is inserted into the mixing tank (1). A circulation pump (24) is provided on one side of the mixing tank (1). The circulation pump (24) is connected to the mixing tank (1) and the water jet degasser (23) via a pipeline. The sodium chloride solution in the mixing tank (1) is drawn into the water jet degasser (23) through the circulation pump (24).

3. The fully automated pretreatment system for recovering triethylamine hydrochloride wastewater according to claim 2, characterized in that: A gas delivery pipe (3) is provided on the pipeline connecting the star-shaped unloader (22) and the water jet pump (23), and a steam heater (31) is provided on the gas delivery pipe (3).

4. The fully automated pretreatment system for recovering triethylamine hydrochloride wastewater according to claim 3, characterized in that: A gas thermometer (37) is installed on the gas pipeline (3), and the gas thermometer (37) is located on the side of the steam heater (31) near the water jet pump (23).

5. The fully automated pretreatment system for recovering triethylamine hydrochloride wastewater according to claim 2, characterized in that: The top of the mixing tank (1) is provided with a vent pipe (25), which is connected to the mixing tank (1).

6. The fully automated pretreatment system for recovering triethylamine hydrochloride wastewater according to claim 2, characterized in that: The filtration assembly includes a plate and frame filter press one (5) and a plate and frame filter press two (51). A conveying pump one (52) is provided between the batching tank (1) and the plate and frame filter press one (5) and the plate and frame filter press two (51). The conveying pump one (52) is connected to the batching tank (1) and the plate and frame filter press one (5) and the plate and frame filter press two (51) respectively through pipelines.

7. The fully automated pretreatment system for recovering triethylamine hydrochloride wastewater according to claim 4, characterized in that: The upper part of the mixing tank (1) is connected to a calcium chloride tank (4) via a pipeline.

8. The fully automated pretreatment system for recovering triethylamine hydrochloride wastewater according to claim 2, characterized in that: The spiral reactor (7) is equipped with a water supply pipe (74) and a water return pipe (75).

9. The fully automated pretreatment system for recovering triethylamine hydrochloride wastewater according to claim 2, characterized in that: The pipe three (9) is connected to the pipe four (92) for conveying defoamer, and the pipe four (92) is connected to the pipe three (9).

Images