CN220034100U - Purification device of NMP waste liquid containing trace moisture - Google Patents
Purification device of NMP waste liquid containing trace moisture Download PDFInfo
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- CN220034100U CN220034100U CN202320997533.6U CN202320997533U CN220034100U CN 220034100 U CN220034100 U CN 220034100U CN 202320997533 U CN202320997533 U CN 202320997533U CN 220034100 U CN220034100 U CN 220034100U
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- waste liquid
- nmp
- condenser
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- 239000007788 liquid Substances 0.000 title claims abstract description 116
- 239000002699 waste material Substances 0.000 title claims abstract description 63
- 238000000746 purification Methods 0.000 title claims abstract description 22
- 238000001704 evaporation Methods 0.000 claims abstract description 71
- 230000008020 evaporation Effects 0.000 claims abstract description 60
- 230000018044 dehydration Effects 0.000 claims abstract description 41
- 238000006297 dehydration reaction Methods 0.000 claims abstract description 41
- 239000012535 impurity Substances 0.000 claims abstract description 17
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 15
- 238000007701 flash-distillation Methods 0.000 claims description 10
- 238000010992 reflux Methods 0.000 claims description 9
- SECXISVLQFMRJM-UHFFFAOYSA-N N-Methylpyrrolidone Chemical compound CN1CCCC1=O SECXISVLQFMRJM-UHFFFAOYSA-N 0.000 description 62
- 208000005156 Dehydration Diseases 0.000 description 29
- 239000000463 material Substances 0.000 description 9
- 238000000034 method Methods 0.000 description 8
- 239000007789 gas Substances 0.000 description 4
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 238000012958 reprocessing Methods 0.000 description 2
- 239000002904 solvent Substances 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- 239000002912 waste gas Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 231100000053 low toxicity Toxicity 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910021645 metal ion Inorganic materials 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D3/00—Distillation or related exchange processes in which liquids are contacted with gaseous media, e.g. stripping
- B01D3/14—Fractional distillation or use of a fractionation or rectification column
- B01D3/143—Fractional distillation or use of a fractionation or rectification column by two or more of a fractionation, separation or rectification step
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D17/00—Separation of liquids, not provided for elsewhere, e.g. by thermal diffusion
- B01D17/02—Separation of non-miscible liquids
- B01D17/0208—Separation of non-miscible liquids by sedimentation
- B01D17/0214—Separation of non-miscible liquids by sedimentation with removal of one of the phases
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D3/00—Distillation or related exchange processes in which liquids are contacted with gaseous media, e.g. stripping
- B01D3/10—Vacuum distillation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D3/00—Distillation or related exchange processes in which liquids are contacted with gaseous media, e.g. stripping
- B01D3/14—Fractional distillation or use of a fractionation or rectification column
- B01D3/143—Fractional distillation or use of a fractionation or rectification column by two or more of a fractionation, separation or rectification step
- B01D3/148—Fractional distillation or use of a fractionation or rectification column by two or more of a fractionation, separation or rectification step in combination with at least one evaporator
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D207/00—Heterocyclic compounds containing five-membered rings not condensed with other rings, with one nitrogen atom as the only ring hetero atom
- C07D207/02—Heterocyclic compounds containing five-membered rings not condensed with other rings, with one nitrogen atom as the only ring hetero atom with only hydrogen or carbon atoms directly attached to the ring nitrogen atom
- C07D207/18—Heterocyclic compounds containing five-membered rings not condensed with other rings, with one nitrogen atom as the only ring hetero atom with only hydrogen or carbon atoms directly attached to the ring nitrogen atom having one double bond between ring members or between a ring member and a non-ring member
- C07D207/22—Heterocyclic compounds containing five-membered rings not condensed with other rings, with one nitrogen atom as the only ring hetero atom with only hydrogen or carbon atoms directly attached to the ring nitrogen atom having one double bond between ring members or between a ring member and a non-ring member with hetero atoms or with carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals, directly attached to ring carbon atoms
- C07D207/24—Oxygen or sulfur atoms
- C07D207/26—2-Pyrrolidones
- C07D207/263—2-Pyrrolidones with only hydrogen atoms or radicals containing only hydrogen and carbon atoms directly attached to other ring carbon atoms
- C07D207/267—2-Pyrrolidones with only hydrogen atoms or radicals containing only hydrogen and carbon atoms directly attached to other ring carbon atoms with only hydrogen atoms or radicals containing only hydrogen and carbon atoms directly attached to the ring nitrogen atom
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
- Heat Treatment Of Water, Waste Water Or Sewage (AREA)
Abstract
The utility model discloses a purification device of NMP waste liquid containing trace moisture, which comprises an evaporation unit, a rectification unit, a dehydration unit and a flash evaporation unit, wherein an NMP waste liquid feed inlet of the evaporation unit is connected with an NMP waste liquid feed pipe, a steam outlet of the evaporation unit is connected with a feed inlet of the rectification unit through a pipeline, a condensate outlet at the top of the rectification unit is connected with the dehydration unit through a pipeline, a liquid outlet at the bottom of the dehydration unit is converged with the NMP waste liquid feed pipe, a liquid outlet at the bottom of the rectification unit is connected with the feed inlet of the flash evaporation unit, the top of the flash evaporation unit is connected with an NMP product output pipe, a bottom discharge outlet of the evaporation unit is connected with a heavy component impurity discharge pipe, and a bottom discharge outlet of the flash evaporation unit is converged with the heavy component impurity discharge pipe through a pipeline. The utility model can obtain NMP product after treating NMP waste liquid containing trace water.
Description
Technical Field
The utility model relates to the technical field of NMP purification, in particular to a purification device for NMP waste liquid containing trace moisture.
Background
N-methyl pyrrolidone (NMP for short) is an important chemical solvent, has the characteristics of low toxicity, high boiling point, strong dissolving power, good selectivity and good stability, and is the most commonly used solvent in the production of metal ion batteries.
NMP waste gas recovery process can be divided into water washing process and runner process, wherein the water content in NMP waste liquid produced by the water washing process is higher, and the water content in NMP waste liquid produced by the runner process is very low (basically the water content in air).
And NMP has a high price, so waste liquid generated by NMP waste gas recovery is usually subjected to waste liquid rectification and purification. The rectification process generally employs a double-column process or a triple-column process. These processes all deal with the waste solutions of NMP which have a high moisture content (> 5%).
There is no process for treating a waste liquid containing almost no moisture in NMP waste liquid (NMP waste liquid produced by the rotary wheel process).
Disclosure of Invention
The utility model aims to provide a purification device of NMP waste liquid containing trace moisture, which is specially used for treating NMP waste liquid containing trace moisture.
To achieve the purpose, the utility model adopts the following technical scheme:
the utility model provides a purification device of NMP waste liquid that contains trace moisture, including evaporation unit, rectifying element, dewatering unit and flash distillation unit, the NMP waste liquid feed inlet and the NMP waste liquid inlet pipe of evaporation unit are connected, the steam outlet of evaporation unit with the feed inlet of rectifying element is connected, the condensate outlet at the top of rectifying element with dewatering unit connects, the liquid outlet of dewatering unit bottom with NMP waste liquid inlet pipe merges, the liquid outlet of rectifying element's bottom pass through the pipeline with the feed inlet of flash distillation unit is connected, NMP product output tube is connected at the top of flash distillation unit, the heavy fraction impurity discharge pipe is connected to the bottom discharge gate of evaporation unit, the bottom discharge gate of flash distillation unit pass through the pipeline with heavy fraction impurity discharge pipe merges.
In the scheme, the NMP waste liquid containing trace moisture refers to NMP waste liquid with the moisture mass fraction less than 5%.
NMP waste liquid containing trace moisture sequentially passes through an evaporation unit and a rectification unit for treatment, the top discharge of the rectification unit is treated by a dehydration unit and then is converged with NMP waste liquid containing trace moisture, and then enters the evaporation unit, and the discharge at the bottom of the rectification unit is treated by a flash evaporation unit, so that an NMP product is obtained.
By adopting the scheme, NMP waste liquid with the water mass fraction less than 5% can be treated.
As a preferred scheme of purification device of NMP waste liquid containing trace moisture, the evaporation unit includes the evaporating kettle and installs in the first reboiler of evaporating kettle bottom, the evaporating kettle has NMP waste liquid feed inlet, the top of evaporating kettle have with the steam outlet of being connected of the feed inlet of rectifying element, the bottom of evaporating kettle have with heavy component impurity discharge pipe connection's discharge gate.
In this scheme, NMP waste liquid that contains trace moisture carries out evaporation treatment in evaporating kettle, and the NMP steam that evaporating kettle top produced gets into the rectifying unit, and the heavy component impurity that evaporating kettle bottom produced discharges.
As a preferred scheme of purification device of NMP waste liquid containing trace moisture, the rectification unit includes rectifying column, first condenser and second reboiler, the rectifying column have with the feed inlet that the evaporation unit is connected, the top gas vent of rectifying column pass through the pipeline with first condenser is connected, the export of first condenser is connected respectively the backward flow mouth at the top of rectifying column with the dehydration unit, the leakage fluid dram of the bottom of rectifying column is connected respectively the second reboiler with flash distillation unit, the discharge gate of second reboiler pass through the pipeline with the backward flow mouth at the bottom of rectifying column is connected.
In the scheme, the water content of NMP solution obtained by condensing the top discharge of the rectifying tower through the first condenser is 10-60%, so that the NMP solution is required to be conveyed to a dehydration unit for dehydration treatment. And one part of the discharged material at the bottom of the rectifying tower flows back after passing through a second reboiler at the bottom of the tower, and the other part of the discharged material is conveyed to a flash evaporation unit for treatment.
As a preferable scheme of the purification device of the NMP waste liquid containing trace moisture, the rectification unit further comprises a first storage tank and a first liquid pump, wherein an outlet of the first condenser is connected with an inlet of the first liquid pump through the first storage tank, one path of the outlet of the first liquid pump is connected with a reflux port at the top of the rectification tower, and the other path of the outlet of the first liquid pump is connected with the dehydration unit.
As a preferred scheme of purification device of NMP waste liquid containing trace moisture, the dehydration unit includes the dehydration tower, be located the third reboiler of the tower bottom of dehydration tower and with the second condenser that the gas vent of the top of dehydration tower is connected, the export of second condenser is connected respectively the return port and the outside raceway at the top of dehydration tower, the liquid outlet of dehydration tower bottom pass through the pipeline with NMP waste liquid inlet pipe merges.
The NMP solution with the water content of 10-60% obtained by condensing the discharged material at the top of the rectifying tower through a first condenser enters a dehydration tower of a dehydration unit for dehydration treatment, and the water is partially used for reflux after being condensed at the top of the dehydration tower, and the other part is discharged; after the NMP waste liquid at the bottom of the dehydration tower is concentrated, the concentrated NMP waste liquid is conveyed into an evaporation kettle of an evaporation unit for re-evaporation treatment.
As a preferable scheme of the purification device of the NMP waste liquid containing trace moisture, the dehydration unit further comprises a second storage tank and a second liquid pump, wherein an outlet of the second condenser is connected with an inlet of the second liquid pump through the second storage tank, one way of the outlet of the second liquid pump is connected with a reflux port at the top of the dehydration tower, and the other way of the outlet of the second liquid pump is connected with the external water pipe.
As a preferred scheme of purification device of NMP waste liquid containing trace moisture, the flash distillation unit includes the flash tank, with the third condenser that the gas vent of flash tank top is connected and install in the flash tank and be located the fourth reboiler of bottom, the flash tank have through the pipeline with the feed inlet that the liquid outlet of the bottom of rectifying element is connected, the bottom of flash tank has the discharge gate, this discharge gate pass through the pipeline with heavy ends impurity discharge pipe merges, NMP product output tube is connected to the liquid outlet of third condenser.
NMP solution from the bottom of the rectifying tower is divided into two discharge flows under the action of a third reboiler in the flash tank, NMP product is formed after the discharge flow at the top of the flash tank is condensed by a third condenser, and heavy component impurities at the bottom of the flash tank and heavy component impurities of the evaporating unit are discharged for reprocessing after being converged.
As a preferred scheme of purification device of NMP waste liquid containing trace moisture, the flash evaporation unit further comprises a third storage tank and a third liquid pump, the liquid discharge port of the third condenser is sequentially connected with the third storage tank and the third liquid pump, and the outlet of the third liquid pump is connected with the NMP product output pipe.
The utility model has the beneficial effects that: the utility model is specially designed for the treatment of the NMP waste liquid containing trace moisture, the NMP waste liquid containing trace moisture is sequentially treated by an evaporation unit and a rectification unit, the top discharge of the rectification unit is treated by a dehydration unit and then is converged with the NMP waste liquid containing trace moisture, and then enters the evaporation unit, and the discharge at the bottom of the rectification unit is treated by a flash evaporation unit, so that the NMP product is obtained.
Drawings
In order to more clearly illustrate the technical solution of the embodiments of the present utility model, the drawings that are required to be used in the embodiments of the present utility model will be briefly described below. It is evident that the drawings described below are only some embodiments of the present utility model and that other drawings may be obtained from these drawings without inventive effort for a person of ordinary skill in the art.
FIG. 1 is a schematic flow chart of a purification device for NMP waste liquid containing trace moisture according to an embodiment of the utility model.
In the figure:
1. an evaporation unit; 11. an evaporation kettle; 12. a first reboiler;
2. a rectification unit; 21. a rectifying tower; 22. a first condenser; 23. a second reboiler; 24. a first storage tank; 25. a first liquid pump;
3. a dehydration unit; 31. a dehydration tower; 32. a third reboiler; 33. a second condenser; 34. a second storage tank; 35. a second liquid pump;
4. a flash unit; 41. a flash tank; 42. a third condenser; 43. a fourth reboiler; 44. a third tank; 45. and a third liquid pump.
Detailed Description
The technical scheme of the utility model is further described below by the specific embodiments with reference to the accompanying drawings.
Wherein the drawings are for illustrative purposes only and are shown in schematic, non-physical, and not intended to be limiting of the present patent; for the purpose of better illustrating embodiments of the utility model, certain elements of the drawings may be omitted, enlarged or reduced and do not represent the size of the actual product; it will be appreciated by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.
The same or similar reference numbers in the drawings of embodiments of the utility model correspond to the same or similar components; in the description of the present utility model, it should be understood that, if the terms "upper", "lower", "left", "right", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, only for convenience in describing the present utility model and simplifying the description, rather than indicating or implying that the apparatus or elements being referred to must have a specific orientation, be constructed and operated in a specific orientation, so that the terms describing the positional relationships in the drawings are merely for exemplary illustration and should not be construed as limiting the present patent, and that the specific meaning of the terms described above may be understood by those of ordinary skill in the art according to specific circumstances.
In the description of the present utility model, unless explicitly stated and limited otherwise, the term "coupled" or the like should be interpreted broadly, as it may be fixedly coupled, detachably coupled, or integrally formed, as indicating the relationship of components; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between the two parts or interaction relationship between the two parts. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.
As shown in fig. 1, the purification device of NMP waste liquid containing trace moisture of this embodiment includes an evaporation unit 1, a rectification unit 2, a dehydration unit 3, and a flash evaporation unit 4.
The evaporation unit 1 comprises an evaporation kettle 11 and a first reboiler 12 arranged at the bottom of the evaporation kettle 11, the evaporation kettle 11 is provided with an NMP waste liquid feeding port, the top of the evaporation kettle 11 is provided with a steam outlet, and the bottom of the evaporation kettle 11 is provided with a discharge port connected with a heavy component impurity discharge pipe.
The rectifying unit 2 comprises a rectifying tower 21, a first condenser 22, a second reboiler 23, a first storage tank 24 and a first liquid pump 25, the rectifying tower 21 is provided with a feed inlet connected with a steam outlet of the evaporating unit 1, a top exhaust port of the rectifying tower 21 is connected with the first condenser 22 through a pipeline, an outlet of the first condenser 22 is connected with an inlet of the first liquid pump 25 through the first storage tank 24, one path of an outlet of the first liquid pump 25 is connected with a reflux port at the top of the rectifying tower 21, the other path of the outlet is connected with the dewatering unit 3, liquid discharge ports at the bottom of the rectifying tower 21 are connected with the second reboiler 23 and the flash evaporation unit 4 through pipelines respectively, and a discharge port of the second reboiler 23 is connected with a reflux port at the bottom of the rectifying tower 21 through a pipeline.
The dehydration unit 3 comprises a dehydration tower 31, a third reboiler 32 positioned at the bottom of the dehydration tower 31, a second condenser 33 connected with an exhaust port at the top of the dehydration tower 31, a second storage tank 34 and a second liquid pump 35, wherein an outlet of the second condenser 33 is connected with an inlet of the second liquid pump 35 through the second storage tank 34, one path of the outlet of the second liquid pump 35 is connected with a backflow port at the top of the dehydration tower 31, the other path of the outlet of the second liquid pump is connected with an external water pipe, and a liquid outlet at the bottom of the dehydration tower 31 is converged with an NMP waste liquid feeding pipe connected to the evaporation kettle 11 through a pipeline.
The flash evaporation unit 4 comprises a flash evaporation tank 41, a third condenser 42 connected with an exhaust port at the top of the flash evaporation tank 41, a fourth reboiler 43 arranged in the flash evaporation tank 41 and positioned at the bottom, a third storage tank 44 and a third liquid pump 45, wherein the flash evaporation tank 41 is provided with a feed inlet connected with a liquid outlet at the bottom of the rectifying tower 21 of the rectifying unit 2 through a pipeline, the bottom of the flash evaporation tank 41 is provided with a discharge port which is converged with the heavy component impurity discharge pipe through a pipeline, the liquid outlet of the third condenser 42 is sequentially connected with the third storage tank 44 and the third liquid pump 45, and the outlet of the third liquid pump 45 is connected with the NMP product output pipe.
In this embodiment, a person skilled in the art may set pumps, valves and other meters on the corresponding pipelines according to actual needs, which will not be described in detail.
The working principle of the purification device of NMP waste liquid containing trace moisture of this embodiment is as follows:
NMP waste liquid containing trace moisture (less than 5%) enters an evaporation kettle 11, NMP steam at the top of the evaporation kettle 11 enters a rectifying tower 21, condensate (moisture content 10-60%) formed by gas discharged from the top of the rectifying tower 21 under the action of a first condenser 22 is stored in a first storage tank 24, part of the condensate is refluxed by a first liquid pump 25, the other part of the condensate is conveyed to a dehydrating tower 31 for dehydration treatment, moisture is removed from the top of the dehydrating tower 31 and forms condensate after passing through a second condenser 33 and stored in a second storage tank 34, part of the condensate is refluxed by a second liquid pump 35, and the other part of the condensate is discharged by an external water pipe; the NMP solution at the bottom of the dehydrating tower 31 is gathered into a NMP waste liquid feeding pipe, and is subjected to cyclic evaporation treatment together with the original NMP waste liquid containing trace moisture (< 5%), the discharged material at the bottom of the rectifying tower 21 flows back after passing through a second reboiler 23, the other part of the discharged material is conveyed into a flash tank 41, the discharged material at the top of the flash tank 41 is stored in a third storage tank 44 after being condensed by a third condenser 42, and then the condensed material is pumped out by a third liquid pump 45, so that an NMP product is obtained; the discharged material (heavy component impurities) at the bottom of the evaporation kettle 11 and the discharged material (heavy component impurities) at the bottom of the flash tank 41 are converged and discharged for reprocessing.
It should be understood that the above description is only illustrative of the preferred embodiments of the present utility model and the technical principles employed. It will be apparent to those skilled in the art that various modifications, equivalents, variations, and the like can be made to the present utility model. However, such modifications are intended to fall within the scope of the present utility model without departing from the spirit of the present utility model. In addition, some terms used in the description and claims of the present utility model are not limiting, but are merely for convenience of description.
Claims (8)
1. The utility model provides a purification device of NMP waste liquid that contains trace moisture, its characterized in that includes evaporation unit, rectifying element, dewatering unit and flash distillation unit, the NMP waste liquid feed inlet and the NMP waste liquid inlet pipe of evaporation unit are connected, the steam outlet of evaporation unit with the feed inlet of rectifying element is connected, the condensate outlet at the top of rectifying element with dewatering unit is connected, the liquid outlet of dewatering unit bottom pass through the pipeline with NMP waste liquid inlet pipe merges, the liquid outlet of the bottom of rectifying element with the feed inlet of flash distillation unit is connected, NMP product output tube is connected at the top of flash distillation unit, the heavy fraction impurity discharge pipe is connected to the bottom discharge gate of evaporation unit, the bottom discharge gate of flash distillation unit pass through the pipeline with heavy fraction impurity discharge pipe merges.
2. The device for purifying NMP waste liquid containing trace moisture according to claim 1, wherein said evaporation unit comprises an evaporation kettle and a first reboiler installed at the bottom of said evaporation kettle, said evaporation kettle has an NMP waste liquid feed inlet, the top of said evaporation kettle has said steam outlet connected to said feed inlet of said rectification unit, and the bottom of said evaporation kettle has a discharge outlet connected to said heavy component impurity discharge pipe.
3. The purification device of NMP waste liquid containing trace moisture according to claim 1, wherein the rectification unit comprises a rectification tower, a first condenser and a second reboiler, the rectification tower is provided with a feed port connected with the evaporation unit, a top exhaust port of the rectification tower is connected with the first condenser through a pipeline, an outlet of the first condenser is respectively connected with a reflux port at the top of the rectification tower and the dehydration unit, a liquid outlet at the bottom of the rectification tower is respectively connected with the second reboiler and the flash evaporation unit, and a discharge port of the second reboiler is connected with a reflux port at the bottom of the rectification tower through a pipeline.
4. The device for purifying NMP waste liquid containing trace moisture according to claim 3, wherein said rectifying unit further comprises a first storage tank and a first liquid pump, wherein an outlet of said first condenser is connected to an inlet of said first liquid pump through said first storage tank, and an outlet of said first liquid pump is connected to a reflux port at a top of said rectifying tower in one path and to said dehydrating unit in the other path.
5. The purification device of the NMP waste liquid containing trace moisture according to claim 1, wherein the dehydration unit comprises a dehydration tower, a third reboiler positioned at the bottom of the dehydration tower and a second condenser connected with an exhaust port at the top of the dehydration tower, an outlet of the second condenser is respectively connected with a reflux port at the top of the dehydration tower and an external water delivery pipe, and a liquid outlet at the bottom of the dehydration tower is converged with the NMP waste liquid feeding pipe through a pipeline.
6. The purification device of the NMP waste liquid containing trace moisture according to claim 5, wherein the dehydration unit further comprises a second storage tank and a second liquid pump, an outlet of the second condenser is connected with an inlet of the second liquid pump through the second storage tank, one path of the outlet of the second liquid pump is connected with a backflow port at the top of the dehydration tower, and the other path of the outlet of the second liquid pump is connected with the external water pipe.
7. The device for purifying NMP waste liquid containing trace moisture according to claim 1, wherein the flash unit comprises a flash tank, a third condenser connected to an exhaust port at the top of the flash tank, and a fourth reboiler installed in the flash tank and located at the bottom, the flash tank has a feed port connected to a drain port at the bottom of the rectification unit through a pipe, the bottom of the flash tank has a discharge port, the discharge port is joined to the heavy component impurity discharge pipe through a pipe, and the drain port of the third condenser is connected to an NMP product output pipe.
8. The device for purifying NMP waste liquid containing trace moisture according to claim 7, wherein said flash evaporation unit further comprises a third storage tank and a third liquid pump, a liquid outlet of said third condenser is connected to said third storage tank and said third liquid pump in sequence, and an outlet of said third liquid pump is connected to said output pipe of NMP product.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320997533.6U CN220034100U (en) | 2023-04-24 | 2023-04-24 | Purification device of NMP waste liquid containing trace moisture |
| DE202023106140.0U DE202023106140U1 (en) | 2023-04-24 | 2023-10-24 | Cleaning device for low moisture NMP waste liquid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320997533.6U CN220034100U (en) | 2023-04-24 | 2023-04-24 | Purification device of NMP waste liquid containing trace moisture |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220034100U true CN220034100U (en) | 2023-11-17 |
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ID=88736327
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320997533.6U Active CN220034100U (en) | 2023-04-24 | 2023-04-24 | Purification device of NMP waste liquid containing trace moisture |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN220034100U (en) |
| DE (1) | DE202023106140U1 (en) |
-
2023
- 2023-04-24 CN CN202320997533.6U patent/CN220034100U/en active Active
- 2023-10-24 DE DE202023106140.0U patent/DE202023106140U1/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| DE202023106140U1 (en) | 2024-03-19 |
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