A triethylamine recovery system

Abstract

The application discloses a triethylamine recovery system and relates to the technical field of chemical equipment. The triethylamine recovery system comprises a dissolving mechanism and a neutralizing mechanism. The dissolving mechanism comprises a dissolving tank, and a first feeding port, a first liquid inlet and a first discharging port are formed in the dissolving tank. The first liquid inlet is used for inputting dissolving liquid. The neutralizing mechanism comprises a neutralizing kettle, and a second feeding port, a second liquid inlet and a second discharging port are formed in the neutralizing kettle. The second feeding port is communicated with the first discharging port, and the second liquid inlet is used for inputting neutralizing liquid. The triethylamine recovery system can cooperate with the dissolving mechanism and the neutralizing mechanism to recover triethylamine in solid triethylamine waste, and the solid triethylamine waste does not need to be stored in a sealed manner, so that the production cost is effectively reduced.

Description

Technical Field

[0001] This application relates to the field of chemical equipment, and in particular to a triethylamine recovery system. Background Technology

[0002] During the synthesis of ethylene carbonate, triethylamine hydrochloride is produced as a byproduct in the form of solid particles. Recycling triethylamine hydrochloride back into triethylamine through a recovery process, thus achieving the recycling of triethylamine, is of great significance for reducing production costs.

[0003] However, current triethylamine hydrochloride recovery technologies have significant shortcomings. Most existing recovery processes and equipment are designed around the waste liquid and wastewater generated during glyphosate production, lacking dedicated recovery and treatment equipment for solid particulate triethylamine hydrochloride. This means that in production scenarios involving the generation of solid triethylamine hydrochloride, such as ethylene carbonate production, the only option is to handle the byproduct through closed storage. This method is not only cumbersome and time-consuming, but also significantly increases storage management costs and the economic burden on the entire production process, making it difficult to meet the demands of efficient and low-cost industrial production. Therefore, developing recovery processes and equipment suitable for solid particulate triethylamine hydrochloride has become an urgent technical challenge for the industry. Utility Model Content

[0004] In order to overcome the shortcomings of the prior art, this application provides a triethylamine recovery system capable of processing solid triethylamine waste.

[0005] The triethylamine recovery system provided in this application adopts the following technical solution:

[0006] A triethylamine recovery system includes a dissolution mechanism and a neutralization mechanism;

[0007] The dissolving mechanism includes a dissolving tank, which has a first feed inlet, a first liquid inlet and a first discharge outlet, wherein the first liquid inlet is used to input the dissolving liquid.

[0008] The neutralization mechanism includes a neutralization vessel, which has a second feed inlet, a second liquid inlet, and a second discharge outlet. The second feed inlet is connected to the first discharge outlet, and the second liquid inlet is used to input neutralizing liquid.

[0009] By adopting the above technical solution, the dissolving mechanism and the neutralizing mechanism can work together to recover triethylamine from the solid triethylamine waste, eliminating the need for closed storage of the solid triethylamine waste and effectively reducing production costs.

[0010] In one specific implementation scheme, the dissolving mechanism further includes a spraying assembly disposed in the dissolving tank. The spraying assembly includes an infusion pipe, multiple spraying pipes connected to the infusion pipe, and a plurality of spraying holes opened on the spraying pipes. One end of the infusion pipe is connected to the first inlet, and the multiple spraying pipes are arranged at intervals along the length of the infusion pipe.

[0011] By adopting the above technical solution, the spraying assembly can evenly spray the input dissolving liquid into the dissolving tank, effectively reducing the dissolving dead zones and improving the dissolving effect of solid triethylamine waste.

[0012] In one specific implementation scheme, the plurality of spray holes includes a plurality of first spray holes and a plurality of second spray holes respectively disposed on the lower part of both sides of the spray pipe in the horizontal direction, and the plurality of first spray holes and the plurality of second spray holes are arranged alternately along the length direction of the spray pipe.

[0013] By adopting the above technical solution, multiple first spray holes and multiple second spray holes can spray dissolving liquid from both sides of the spray pipe toward the bottom of the dissolving tank. This not only prevents the excessive accumulation of solid triethylamine waste at the bottom of the dissolving tank, but also further improves the dissolution efficiency of solid triethylamine waste.

[0014] In one specific implementation scheme, the dissolving mechanism further includes a first circulation component, the first circulation component including a circulation pipe with its two ends respectively connected to the first discharge port and the first liquid inlet, a first delivery pump disposed on the circulation pipe, a first valve disposed on the circulation pipe between the first discharge port and the first delivery pump, and a second valve disposed on the circulation pipe between the first delivery pump and the first liquid inlet.

[0015] By adopting the above technical solution, the first delivery pump can circulate and pump the dissolved liquid in the dissolving tank to the spraying assembly, which not only improves the dissolution efficiency of solid triethylamine waste, but also reduces the consumption of dissolved liquid and saves costs.

[0016] In one specific implementation scheme, the dissolving mechanism further includes a slag discharge assembly located at the lower part of the dissolving tank. The slag discharge assembly includes a partition disposed in the dissolving tank, a slag discharge cavity formed between the partition and the bottom surface of the dissolving tank, a slag discharge port opened on the dissolving tank and communicating with the slag discharge cavity, a slag discharge pipe communicating with the slag discharge port, and a third valve disposed on the slag discharge pipe.

[0017] By adopting the above technical solution, impurities at the bottom of the dissolving tank can be discharged outward through the slag discharge pipe to prevent impurities from accumulating and affecting the dissolution effect of solid triethylamine waste; while the baffle can block the dissolving liquid, preventing too much dissolving liquid from being discharged outward with the impurities and affecting the dissolution effect of solid triethylamine waste.

[0018] In one specific implementation, the neutralization mechanism further includes a discharge assembly, which includes a discharge pipe, a first branch pipe and a second branch pipe connected to the discharge pipe, a fourth valve provided on the first branch pipe, and a fifth valve provided on the second branch pipe. The discharge pipe is connected to a second discharge port, the first branch pipe is connected to a first storage tank, and the second branch pipe is connected to a second storage tank.

[0019] By adopting the above technical solution, the triethylamine obtained after neutralization and the reaction waste liquid can be output and stored through the first branch pipe and the second branch pipe, respectively, which effectively improves the recovery quality and recovery efficiency of triethylamine.

[0020] In one specific implementation, the neutralization mechanism further includes a stirring assembly, a second circulation assembly, and a detection assembly. The second circulation assembly includes an inlet pipe and an outlet pipe connected to the neutralization vessel, and the detection assembly includes a second temperature module and a first pressure module disposed on the neutralization vessel.

[0021] In one specific implementation scheme, the triethylamine recovery system further includes a first separation mechanism located at the front end of the dissolution mechanism. The first separation mechanism includes a first solid-liquid separation component and a feeding component whose two ends are respectively connected to the first solid-liquid separation component and the first feed inlet.

[0022] By adopting the above technical solution, the first separation unit can dry the solid triethylamine waste, thus avoiding the influence of the moisture contained in the solid triethylamine waste on the subsequent dissolution.

[0023] In one specific implementation, the triethylamine recovery system further includes a second separation mechanism disposed between the dissolving mechanism and the neutralizing mechanism. The second separation mechanism includes a second solid-liquid separation component and a liquid storage component that are interconnected. The second solid-liquid separation component is connected to the first discharge port, and the liquid storage component is connected to the second inlet port.

[0024] By adopting the above technical solution, the second separation unit can purify and refine the dissolved triethylamine waste liquid, thereby removing impurities from the triethylamine waste liquid and improving the quality of the recovered triethylamine.

[0025] In one specific implementation scheme, a first conveying component is connected between the first discharge port and the second solid-liquid separation component. The first conveying component includes a first conveying pipe, and a sixth valve is provided on the first conveying pipe.

[0026] A second conveying assembly is connected between the liquid storage component and the second inlet. The second conveying assembly includes a second conveying pipe, on which a second conveying pump and a seventh valve are installed.

[0027] In summary, this application includes at least one of the following beneficial technical effects:

[0028] The dissolving and neutralizing mechanisms can work together to recover triethylamine from solid triethylamine waste, eliminating the need for sealed storage of the solid triethylamine waste and effectively reducing production costs. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the triethylamine recovery system according to an embodiment of this application.

[0030] Figure 2 This is a schematic diagram of the structure of the spray assembly according to an embodiment of this application.

[0031] Explanation of reference numerals in the attached figures:

[0032] 1. Dissolving mechanism; 10. First exhaust pipe; 11. Dissolving tank; 111. First feed inlet; 112. First liquid inlet; 113. First discharge outlet; 12. Spray assembly; 121. Liquid delivery pipe; 122. Spray pipe; 123. Spray hole; 13. First circulation assembly; 131. Circulation pipe; 132. First transfer pump; 133. First valve; 134. Second valve; 14. Slag discharge assembly; 141. Baffle plate; 142. Slag discharge chamber; 143. Slag discharge port; 144. Slag discharge pipe; 145. Third valve; 15. Feed pipe; 16. Water injection pipe; 17. Eighth valve; 18. First flow meter; 19. First level gauge;

[0033] 2. Neutralization mechanism; 20. Second exhaust pipe; 21. Neutralization vessel; 211. Second feed inlet; 212. Second liquid inlet; 213. Second discharge outlet; 22. Discharge assembly; 221. Discharge pipe; 222. First branch pipe; 223. Second branch pipe; 224. Fourth valve; 225. Fifth valve; 226. First storage tank; 227. Second storage tank; 228. Anti-cyclone device; 229. Sight glass; 23. Stirring assembly; 24. Second circulation assembly; 241. Water inlet pipe; 242. Water return pipe; 243. First temperature module; 25. Detection assembly; 251. Second temperature module; 252. First pressure module; 26. Liquid injection pipe; 27. Ninth valve; 28. Third flow meter; 29. ​​Densitometer;

[0034] 3. First separation mechanism; 31. First solid-liquid separation assembly; 32. Feeding assembly;

[0035] 4. Second separation mechanism; 41. Second solid-liquid separation assembly; 42. Liquid storage assembly;

[0036] 5. First conveying assembly; 51. First conveying pipe; 52. Sixth valve; 53. Second pressure module;

[0037] 6. Second conveying assembly; 61. Second conveying pipe; 62. Second conveying pump; 63. Seventh valve; 64. Second flow meter. Detailed Implementation

[0038] The present application will be further described in detail below with reference to the accompanying drawings.

[0039] See Figure 1 As shown, a triethylamine recovery system is illustrated for treating triethylamine hydrochloride particles generated during the synthesis of vinylene carbonate to recover the triethylamine therein. The triethylamine recovery system includes a first separation unit 3, a dissolution unit 1, a second separation unit 4, and a neutralization unit 2, arranged sequentially.

[0040] The first separation mechanism 3 includes a first solid-liquid separation component 31 and a feeding component 32 connected at both ends to the first solid-liquid separation component 31 and the dissolving mechanism 1, respectively. The first solid-liquid separation component 31 is a filter press in the prior art, specifically a four-in-one filter press, which can dehydrate and dry triethylamine hydrochloride particles containing moisture. The feeding component 32 is a scraper conveyor in the prior art, with the outlet of the filter press connected to the inlet of the scraper conveyor, which can transport the dried triethylamine hydrochloride particles in a fully sealed manner.

[0041] In this embodiment, the dissolving mechanism 1 includes a dissolving tank 11, which has a first feed inlet 111, a first liquid inlet 112 and a first discharge outlet 113. The first feed inlet 111 is located at the top of the dissolving tank 11 and is connected to the outlet of the feeding assembly 32 by a feed pipe 15. The first liquid inlet 112 and the first discharge outlet 113 are located on the side of the dissolving tank 11 along the vertical direction. The first liquid inlet 112 is connected to a water injection pipe 16. The water injection pipe 16 is equipped with an eighth valve 17 and a first flow meter 18. The water injection pipe 16 is used to inject water into the dissolving tank 11.

[0042] When the first solid-liquid separation component 31 removes water and dries the triethylamine hydrochloride particles, the water injection pipe 16 injects water into the dissolution tank 11 in advance. Then, after the triethylamine hydrochloride particles enter the dissolution tank 11, the water injection pipe 16 injects water into the dissolution tank 11 again. The triethylamine hydrochloride particles can dissolve in water and form a triethylamine hydrochloride solution.

[0043] A first level gauge 19 is also installed on the dissolving tank 11. The first level gauge 19 can cooperate with the first flow meter 18 to control the water injection volume of the water injection pipe 16. When the preset water volume value is reached, the eighth valve 17 is closed. A first exhaust pipe 10 is also connected to the upper part of the dissolving tank 11. The first exhaust pipe 10 is connected to a fan and is used to discharge the waste gas generated during the dissolution of triethylamine hydrochloride particles.

[0044] In this embodiment, combined with Figure 2 As shown, a spray assembly 12 is also provided in the dissolving tank 11. The spray assembly 12 is horizontally arranged in the lower part of the dissolving tank 11, and a support for supporting the spray assembly 12 is provided at the bottom of the dissolving tank 11. The spray assembly 12 includes a horizontally extending infusion pipe 121, multiple spray pipes 122 that are connected to both sides of the infusion pipe 121 in a horizontal direction and perpendicular to the infusion pipe 121, and a number of spray holes 123 opened on the spray pipes 122. One end of the infusion pipe 121 is connected to the first inlet 112. The multiple spray pipes 122 are arranged at intervals along the length of the infusion pipe 121, and the multiple spray pipes 122 located on both sides of the infusion pipe 121 are arranged symmetrically in pairs.

[0045] The spray holes 123 include a plurality of first spray holes and a plurality of second spray holes respectively located on the lower part of both sides of the spray pipe 122 in the horizontal direction. The plurality of first spray holes and the plurality of second spray holes are arranged alternately along the length of the spray pipe 122. The angle between the opening direction of the first spray hole and the horizontal direction is 45°, and the angle between the opening direction of the second spray hole and the horizontal direction is also 45°.

[0046] In this way, the spray assembly 12 can spray the input water evenly into the dissolving tank 11, effectively reducing the dead zones in the dissolution process and improving the dissolution effect of triethylamine hydrochloride particles. At the same time, multiple first spray holes and multiple second spray holes can spray water from both sides of the spray pipe 122 toward the bottom of the dissolving tank 11, which can prevent the triethylamine hydrochloride particles from accumulating excessively at the bottom of the dissolving tank 11.

[0047] In this embodiment, combined again Figure 1 As shown, the spray assembly 12 is located below the first discharge port 113. The dissolving mechanism 1 also includes a first circulation assembly 13. The first circulation assembly 13 includes a circulation pipe 131 with its two ends connected to the first discharge port 113 and the first liquid inlet 112, respectively, and a first delivery pump 132 disposed on the circulation pipe 131. A first valve 133 is disposed on the circulation pipe 131 between the first discharge port 113 and the first delivery pump 132, and a second valve 134 is disposed on the circulation pipe 131 between the first delivery pump 132 and the first liquid inlet 112. A water injection pipe 16 is connected to the circulation pipe 131 between the first delivery pump 132 and the first liquid inlet 112.

[0048] After opening the first valve 133 and the second valve 134, the first delivery pump 132 can continuously pump the water in the upper part of the dissolving tank 11 to the spray assembly 12. Then the spray assembly 12 continuously sprays water onto the triethylamine hydrochloride particles at the bottom of the dissolving tank 11. This not only ensures the dissolution efficiency of the triethylamine hydrochloride particles, but also eliminates the need for continuous water supply, thereby reducing water consumption and saving costs.

[0049] In this embodiment, the dissolving mechanism 1 further includes a slag discharge assembly 14, which is located at the lower part of the dissolving tank 11. The slag discharge assembly 14 includes a partition 141 disposed in the dissolving tank 11 and located on one side of the spray assembly 12, a slag discharge cavity 142 formed between the partition 141 and the bottom surface of the dissolving tank 11, a slag discharge port 143 opened on the dissolving tank 11 and communicating with the slag discharge cavity 142, a slag discharge pipe 144 communicating with the slag discharge port 143, and a third valve 145 disposed on the slag discharge pipe 144. The slag discharge pipe 144 is connected to the circulation pipe 131 between the first discharge port 113 and the first conveying pump 132.

[0050] After the dissolving tank 11 has been in operation for a long time, a lot of impurities will remain at the bottom. At this time, water can be injected into the dissolving tank 11 through the water injection pipe 16. The injected water is sprayed onto the bottom of the dissolving tank 11 through the spray assembly 12. The impurities after being washed are discharged out through the slag discharge pipe 144 to prevent the accumulation of impurities from affecting the dissolution effect of solid triethylamine waste. The baffle 141 can block the dissolving liquid and prevent too much water from being discharged out with the impurities, thus affecting the dissolution effect of solid triethylamine waste.

[0051] In this embodiment, the second separation mechanism 4 includes a second solid-liquid separation component 41 and a liquid storage component 42 that are interconnected. The second solid-liquid separation component 41 is connected to the dissolving mechanism 1, and the liquid storage component 42 is connected to the neutralization mechanism 2. The second solid-liquid separation component 41 is also a filter press in the prior art, specifically a plate and frame filter press. The second solid-liquid separation component 41 can remove impurities from the dissolved triethylamine hydrochloride solution. The liquid storage component 42 is a storage tank, on which a second level gauge is installed, and the first outlet 113 is connected to the inlet of the plate and frame filter press. The storage tank can store clean triethylamine hydrochloride solution, allowing the triethylamine hydrochloride solution to enter the neutralization mechanism 2 in batches, thereby improving the neutralization effect.

[0052] A first conveying assembly 5 connects the first discharge port 113 and the second solid-liquid separation assembly 41. The first conveying assembly 5 includes a first conveying pipe 51, and the first discharge pipe 221 is connected to the circulation pipe 131. A sixth valve 52 and a second pressure module 53 are installed on the first conveying pipe 51. The second pressure module 53 is a pressure gauge. After the triethylamine hydrochloride particles are dissolved, the first valve 133 and the sixth valve 52 are opened, and the second valve 134 is closed. The dissolved triethylamine hydrochloride solution can enter the second solid-liquid separation assembly 41 through the first conveying pipe 51 under the action of the first delivery pump 132. When the pressure displayed by the second pressure module 53 is too high, the first delivery pump 132 can be turned off and the second solid-liquid separation assembly 41 can be cleaned.

[0053] Of course, the impurities discharged from the slag discharge pipe 144 can also enter the second solid-liquid separation component 41 through the first conveying pipe 51 to complete the purification of the impurities.

[0054] In this embodiment, the neutralization mechanism 2 includes a neutralization vessel 21, and a stirring assembly 23 is provided inside the neutralization vessel 21. The stirring assembly 23 includes a stirring paddle and a motor for driving the stirring paddle to rotate. The neutralization vessel 21 has a second feed inlet 211, a second liquid inlet 212 and a second discharge outlet 213. The second feed inlet 211 is connected to the outlet of the storage tank. A second conveying assembly 6 is connected between the storage tank and the second feed inlet 211. The second conveying assembly 6 includes a second conveying pipe 61. The second conveying pipe 61 is provided with a second delivery pump 62, a seventh valve 63 and a second flow meter 64. The second liquid inlet 212 is connected to an injection pipe 26. The injection pipe 26 is provided with a ninth valve 27 and a third flow meter 28. The injection pipe 26 is used to inject sodium hydroxide solution into the neutralization vessel 21.

[0055] After the triethylamine hydrochloride solution is purified, the seventh valve 63 and the second transfer pump 62 are opened. The triethylamine hydrochloride solution enters the neutralization vessel 21 through the second feed pipe 61. The sodium hydroxide solution can neutralize the triethylamine hydrochloride solution under the action of the stirring paddle to obtain aqueous triethylamine, sodium chloride solution and water. Then, the aqueous triethylamine is output through the second discharge port 213, thus realizing the recovery of triethylamine.

[0056] In this embodiment, the neutralization mechanism 2 further includes a discharge assembly 22, which includes a discharge pipe 221, a first branch pipe 222 and a second branch pipe 223 connected to the discharge pipe 221, a fourth valve 224 provided on the first branch pipe 222, and a fifth valve 225 provided on the second branch pipe 223. The discharge pipe 221 is connected to a second discharge port 213. The first branch pipe 222 is connected to a first storage tank 226, and the second branch pipe 223 is connected to a second storage tank 227. The first storage tank 226 is used to store aqueous triethylamine, and the second storage tank 227 is used to store sodium chloride.

[0057] The aqueous triethylamine, sodium chloride solution, and water are allowed to stand and separate into layers. Then, the fifth valve 225 is opened, allowing the sodium chloride solution at the bottom to flow into the second storage tank 227 through the second branch pipe 223. After the sodium chloride solution has drained, the fourth valve 224 is opened, allowing the aqueous triethylamine to flow into the first storage tank 226 through the first branch pipe 222. The first storage tank 226 is connected to a distillation system, which further purifies the aqueous triethylamine into the finished product triethylamine.

[0058] In this embodiment, an anti-swirling device 228 is also provided between the discharge pipe 221 and the second discharge port 213. The anti-swirling device 228 is a prior art technology that can enhance the discharge effect. A sight glass 229 for observing the discharge situation is provided on the discharge pipe 221. A densitometer 29 is also provided at the second discharge port 213. The densitometer 29 can detect the density of the output material and determine the type of output material based on the density parameter, thereby switching the fourth valve 224 and the fifth valve 225 according to the material type.

[0059] In this embodiment, the neutralization mechanism 2 further includes a second circulation component 24 and a detection component 25. The second circulation component 24 includes an inlet pipe 241 and a return pipe 242 connected to the neutralization vessel 21. The return pipe 242 is equipped with a first temperature module 243 for monitoring the return water temperature; the first temperature module 243 is a thermometer. The inlet pipe 241 and the return pipe 242 are used to circulate water to the neutralization vessel 21 to ensure the normal progress of the neutralization reaction. The detection component 25 includes a second temperature module 251 and a first pressure module 252 installed on the neutralization vessel 21. The second temperature module 251 is a thermometer, and the first pressure module 252 is a pressure gauge. Both can monitor the temperature and pressure inside the neutralization vessel 21 to ensure the normal progress of the neutralization reaction.

[0060] A second exhaust pipe 20 is also connected to the upper part of the neutralization vessel 21. The second exhaust pipe 20 is connected to a fan and is used to discharge the waste gas generated during the neutralization reaction of the triethylamine hydrochloride solution.

[0061] The implementation principle of a triethylamine recovery system according to an embodiment of this application is as follows:

[0062] Triethylamine hydrochloride particles are fed into the first solid-liquid separation component 31 for dehydration and drying, and then the dried triethylamine hydrochloride particles are fed into the dissolving mechanism 1 through the feeding component 32.

[0063] When the triethylamine hydrochloride particles enter the dissolution mechanism 1, water is passed into the dissolution mechanism 1, and the triethylamine hydrochloride particles dissolve in the water to form a triethylamine hydrochloride solution;

[0064] The triethylamine hydrochloride solution is sent to the second solid-liquid separation component 41 for purification to remove impurities from the triethylamine hydrochloride solution, and then the clean triethylamine hydrochloride solution is sent to the storage tank.

[0065] The triethylamine hydrochloride solution in the storage tank is fed into neutralization unit 2 in batches; at the same time, sodium hydroxide solution is introduced into neutralization unit 2, and the triethylamine hydrochloride solution and sodium hydroxide solution undergo a neutralization reaction to obtain aqueous triethylamine, sodium chloride solution and water;

[0066] After standing and separating, the aqueous triethylamine and sodium chloride solutions are output separately. The output aqueous triethylamine is then sent to a distillation system for further purification, and finally the finished product triethylamine is obtained.

[0067] 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 triethylamine recovery system characterized by: The device comprises a dissolving mechanism (1) and a neutralizing mechanism (2); The dissolving mechanism (1) comprises a dissolving tank (11) with a first feeding port (111), a first liquid inlet (112) and a first discharging port (113), and the first liquid inlet (112) is used for inputting dissolving liquid. The neutralizing mechanism (2) comprises a neutralizing tank (21) with a second feeding port (211), a second liquid inlet (212) and a second discharging port (213), the second feeding port (211) is communicated with the first discharging port (113), and the second liquid inlet (212) is used for inputting neutralizing liquid.

2. A triethylamine recovery system according to claim 1, characterized in that: The dissolving mechanism (1) further comprises a spraying assembly (12) arranged in the dissolving tank (11), the spraying assembly (12) comprises a liquid conveying pipe (121), a plurality of spraying pipes (122) communicated with the liquid conveying pipe (121), and a plurality of spraying holes (123) arranged on the spraying pipes (122), one end of the liquid conveying pipe (121) is communicated with the first liquid inlet (112), and the plurality of spraying pipes (122) are arranged along the length direction of the liquid conveying pipe (121) at intervals.

3. A triethylamine recovery system according to claim 2, characterised in that: The plurality of spraying holes (123) comprise a plurality of first spraying holes and a plurality of second spraying holes arranged at the lower part of the two sides of the spraying pipes (122) in the horizontal direction, and the plurality of first spraying holes and the plurality of second spraying holes are arranged along the length direction of the spraying pipes (122) at intervals.

4. A triethylamine recovery system according to claim 2, characterized in that: The dissolving mechanism (1) further comprises a first circulating assembly (13), the first circulating assembly (13) comprises a circulating pipe (131) with two ends communicated with the first discharging port (113) and the first liquid inlet (112) respectively, a first conveying pump (132) arranged on the circulating pipe (131), a first valve (133) arranged on the circulating pipe (131) between the first discharging port (113) and the first conveying pump (132), and a second valve (134) arranged on the circulating pipe (131) between the first conveying pump (132) and the first liquid inlet (112).

5. A triethylamine recovery system according to claim 1, characterized in that: The dissolving mechanism (1) further comprises a residue discharging assembly (14) arranged at the lower part of the dissolving tank (11), the residue discharging assembly (14) comprises a partition plate (141) arranged in the dissolving tank (11), a residue discharging cavity (142) formed between the partition plate (141) and the bottom surface of the dissolving tank (11), a residue discharging port (143) arranged on the dissolving tank (11) and communicated with the residue discharging cavity (142), a residue discharging pipe (144) communicated with the residue discharging port (143), and a third valve (145) arranged on the residue discharging pipe (144).

6. A triethylamine recovery system according to claim 1, characterized in that: The neutralizing mechanism (2) further comprises a discharging assembly (22), the discharging assembly (22) comprising a discharging pipe (221), a first sub-pipe (222) and a second sub-pipe (223) communicated with the discharging pipe (221), a fourth valve (224) arranged on the first sub-pipe (222), and a fifth valve (225) arranged on the second sub-pipe (223), the discharging pipe (221) being communicated with the second discharging port (213), the first sub-pipe (222) being communicated with a first storage tank (226), and the second sub-pipe (223) being communicated with a second storage tank (227).

7. A triethylamine recovery system according to claim 1, characterized in that: The neutralizing mechanism (2) further comprises a stirring assembly (23), a second circulating assembly (24), and a detecting assembly (25), the second circulating assembly (24) comprising a water inlet pipe (241) and a water return pipe (242) communicated with the neutralizing kettle (21), and the detecting assembly (25) comprising a second temperature module (251) and a first pressure module (252) arranged on the neutralizing kettle (21).

8. A triethylamine recovery system according to claim 1, characterized in that: The triethylamine recovery system further comprises a first separating mechanism (3) arranged at the front end of the dissolving mechanism (1), the first separating mechanism (3) comprising a first solid-liquid separation assembly (31) and a feeding assembly (32) communicated with the first solid-liquid separation assembly (31) and the first feeding port (111) respectively.

9. A triethylamine recovery system according to claim 1, characterized in that: The triethylamine recovery system further comprises a second separating mechanism (4) arranged between the dissolving mechanism (1) and the neutralizing mechanism (2), the second separating mechanism (4) comprising a second solid-liquid separation assembly (41) and a liquid storage assembly (42) communicated with each other, the second solid-liquid separation assembly (41) being communicated with the first discharging port (113), and the liquid storage assembly (42) being communicated with the second feeding port (211).

10. A triethylamine recovery system according to claim 9, characterized in that: A first feeding assembly (5) is communicated between the first discharging port (113) and the second solid-liquid separation assembly (41), the first feeding assembly (5) comprising a first feeding pipe (51), and a sixth valve (52) being arranged on the first feeding pipe (51); A second feeding assembly (6) is communicated between the liquid storage assembly (42) and the second feeding port (211), the second feeding assembly (6) comprising a second feeding pipe (61), and a second conveying pump (62) and a seventh valve (63) being arranged on the second feeding pipe (61).

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