CN111167146A - NMP waste liquid is retrieved with dehydration tower - Google Patents
NMP waste liquid is retrieved with dehydration tower Download PDFInfo
- Publication number
- CN111167146A CN111167146A CN201911368082.4A CN201911368082A CN111167146A CN 111167146 A CN111167146 A CN 111167146A CN 201911368082 A CN201911368082 A CN 201911368082A CN 111167146 A CN111167146 A CN 111167146A
- Authority
- CN
- China
- Prior art keywords
- tower
- section
- waste liquid
- pipe
- tower body
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
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
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
Abstract
The invention relates to the technical field of chemical equipment, and particularly discloses a dehydration tower for recycling NMP (N-methyl pyrrolidone) waste liquid, which comprises a tower base, a tower kettle, a tower body and a tower top which are fixedly connected in sequence, wherein the bottom of the tower kettle is communicated with a discharge pipe, the side wall of the tower kettle is communicated with a steam pipe, the tower top is communicated with an air outlet, filler is arranged in the tower body, the tower body comprises a rectifying section and a stripping section, the rectifying section is positioned above the stripping section, the diameter of the rectifying section is 0.65-0.7 times of that of the stripping section, the stripping section is provided with a feed pipe, the feed pipe is provided with a liquid distributor positioned in the tower body, the upper part of the rectifying section is provided with a return pipe, and the return pipe is provided with a return distributor. By adopting the technical scheme in the patent, the separation requirement of the NMP waste liquid can be ensured, the product meeting the purity requirement can be obtained, the size of equipment can be optimized, and the equipment investment is reduced.
Description
Technical Field
The invention relates to the technical field of chemical equipment, in particular to a dehydration tower for recycling NMP waste liquid.
Background
With the rapid development of global economy, the exploitation amount of non-renewable resources such as petroleum and coal is continuously increased, and people are forced to find new energy. Lithium batteries have been widely used in various fields due to their small size, high voltage, light weight, no memory effect, no pollution, high specific energy, and long service life. In recent years, due to the rapid development of lithium batteries, N-methylpyrrolidone (NMP for short) has been used in large quantities as an auxiliary material for positive electrodes.
In a lithium battery, NMP is mainly used for dissolving PVDF to manufacture structural materials such as electrodes, diaphragms and the like; in the process of preparing the lithium ion battery, NMP is often used as an excellent organic solvent for a positive electrode material, a binder and a mixed solution of other substances. The water content and the particle content in NMP affect the performance of the electrode material and the electrolyte of the lithium battery, and metal ions easily cause the breakdown effect of the lithium battery in the using process. Therefore, the use of high quality NMP has an important influence on the number of times lithium batteries are charged and discharged and the service life. Generally, NMP can be recovered by washing and condensing in a lithium battery production plant, NMP waste liquid after washing, condensing and recovering can be reused after being purified to the components of more than 99.9 wt%, and the purity required by some electronic industries can be higher, so that the stable and efficient waste liquid rectification process has an extremely important role in recycling NMP, but the NMP obtained by the existing rectification tower has insufficient purity and lower efficiency.
Disclosure of Invention
The invention provides a dehydration tower for recovering NMP waste liquid, which aims to solve the problems of insufficient purity and low efficiency of NMP obtained by the existing dehydration tower.
In order to achieve the purpose, the technical scheme of the invention is as follows:
the utility model provides a NMP waste liquid is retrieved and is used dehydration tower, includes fixed connection's tower base, tower cauldron, tower body and top of the tower in proper order, tower cauldron bottom intercommunication has the discharging pipe, and the intercommunication has the steam pipe on the lateral wall of tower cauldron, and top of the tower intercommunication has the gas outlet, is equipped with the filler in the tower body, the tower body includes rectifying section and stripping section, and the rectifying section is located the top of stripping section, and the diameter of rectifying section is 0.65 ~ 0.7 times of stripping section diameter, is equipped with the inlet pipe on the stripping section, and inlet pipe department is equipped with the liquid distributor who is located the tower body, and the upper portion of rectifying section is equipped with the back flow, back flow department is equipped with the backward flow distributor who is located the.
The technical principle and the effect of the technical scheme are as follows:
1. when the scheme is adopted to treat the waste liquid, high-temperature steam generated by a reboiler is sent into a tower kettle through a steam pipe, the waste liquid is pumped into a tower body through a feeding pipe, is uniformly dispersed under the action of a liquid distributor, flows downwards and is contacted with the high-temperature steam in a stripping section, light component materials in the waste liquid are quickly evaporated under the action of the high-temperature steam, flow upwards and enter the rectifying section, enter a condenser arranged outside from a top air outlet, after being condensed in the condenser, part of condensate returns to a reflux tank arranged outside a dehydration tower again under the action of gravity flow or a booster pump, and then enter the dehydration tower again under the action of a reflux distributor through the reflux tank and a reflux pipe, and the process is to ensure the mass transfer and the heat transfer of gas and liquid in the dehydration tower; in addition, heavy component materials fall downwards into the tower kettle and are discharged from a discharge pipe at the bottom of the tower kettle, so that the efficient recovery of NMP in waste liquid is realized.
2. In general, the content of impurity water in the NMP waste liquid is obviously lower than that of the effective component NMP. Because light component water in the dehydration tower is evaporated from the top of the tower, the load of the stripping section (lower half section) of the dehydration tower is obviously higher than that of the rectifying section (upper half section), if the diameters of the rectifying section and the stripping section of the dehydration tower are the same, the diameter of the tower selected because the stripping section meets the hydraulics requirement will appear, and the rectifying section has larger allowance. In the scheme, the reducing dehydration tower with the small top and the large bottom is determined according to the maximum gas-liquid load of the stripping section and the rectifying section, so that the separation requirement of NMP waste liquid can be ensured, a product meeting the purity requirement can be obtained, the size of equipment can be optimized, and the equipment investment is reduced.
Assuming that the treatment capacity of the dehydration tower before reconstruction on the waste liquid is 2.5t/h, under the condition of meeting hydraulics, the required tower diameter is 1m, and the net weight of the equipment is 2.4 t. By adopting the scheme, the treatment capacity is still 2.5t/h, the tower diameter of the stripping section is still 1m, the tower diameter of the rectifying section can be reduced to 0.7m on the premise of meeting the hydraulics, the net weight of equipment is 1.8t, the net weight of the equipment is reduced by 25%, and the investment of the equipment is reduced.
Furthermore, a conical section is fixed between the rectifying section and the stripping section, and the conical section is narrow at the top and wide at the bottom.
Has the advantages that: the effect that sets up the toper section lies in, and the waste liquid after the vaporization can enter into the rectification section along the inner wall of toper section in, and on the assumption that is the horizontally board between rectification section and the stripping section and is connected, directly striking the horizontally board when the waste liquid after the vaporization up-flow then, directly condense even on the horizontal board for the rectification effect of waste liquid reduces.
Further, be equipped with the water conservancy diversion structure on the inner wall of toper section, the water conservancy diversion structure includes many water conservancy diversion strips of fixing on toper section inner wall, and many vertical settings of water conservancy diversion strip, many water conservancy diversion strips form the guiding gutter along the circumference equipartition of toper section between the adjacent water conservancy diversion strip.
Has the advantages that: and a plurality of flow guide grooves are formed, so that liquid beads which are possibly condensed on the inner wall of the conical section can flow downwards along the flow guide grooves in the working process of the dehydration tower, enter the stripping section again and are vaporized under the action of high-temperature steam, and then the rectification is completed.
Furthermore, the tower body comprises a plurality of cylinders, flange plates are fixed at the end parts of the cylinders, adjacent flange plates are connected through bolts, and fillers are arranged in the cylinders.
Has the advantages that: because the dehydration tower is bulky and high, the convenient installation of the tower body is realized.
Further, a sealing structure is arranged between the adjacent cylinders, the sealing structure comprises a concave ring fixed at the top of the cylinder and a limiting ring fixed at the bottom of the cylinder and in an inverted convex shape, and the concave ring on the adjacent cylinder is matched and connected with the limiting ring.
Has the advantages that: set up like this and make the leakproofness between the barrel improve to make the leakproofness of whole tower body improve, prevent that the waste liquid of vaporization from leaking outward.
Further, the liquid distributor and the reflux distributor are both groove-type distributors.
Has the advantages that: the distillation rate of the mixed material is further improved by adopting a groove type distributor.
Further, the steam pipe is connected with a reboiler, and a connecting pipe communicated with the reboiler is arranged at the bottom of the tower kettle.
Has the advantages that: the material with higher boiling point (still in liquid state) in the heavy component material can enter the reboiler through the connecting pipe, is discharged into the tower kettle again from the steam pipe after being vaporized under the action of the reboiler, and is circulated again for distillation treatment.
Furthermore, the end part of the steam pipe, which is positioned at one end in the tower kettle, is sealed, and a notch is formed in the steam pipe and is arranged downwards.
Has the advantages that: the arrangement is such that when the high-temperature steam is discharged into the tower kettle, the flow direction of the high-temperature steam flows downwards and then upwards, so as to prolong the contact time between the high-temperature steam and the waste liquid.
Furthermore, a plurality of grid plates are fixed in the tower body and are respectively positioned above the steam pipe, above and below the liquid distributor and below the reflux distributor.
Has the advantages that: the setting of grid tray is more enough to carry out the redispersion to steam or waste liquid for waste liquid distillation efficiency improves.
Further, the tip that the inlet pipe is located one end in the tower body is sealed setting, a plurality of discharge openings have been seted up along its axial in the inlet pipe bottom.
Has the advantages that: compare and adopt a macropore feeding among the prior art, adopt a plurality of little discharge openings feeding in this scheme for the waste liquid can be even flow down, and then improve the rectification effect of waste liquid.
Drawings
FIG. 1 is an overall schematic view of embodiment 1 of the present invention;
FIG. 2 is an enlarged view of portion A of FIG. 1;
FIG. 3 is an enlarged view of portion B of FIG. 1;
FIG. 4 is an enlarged view of portion C of FIG. 1;
FIG. 5 is an enlarged view of portion D of FIG. 1;
FIG. 6 is an enlarged view of section E of FIG. 1;
FIG. 7 is an enlarged view of portion F of FIG. 2;
fig. 8 is a sectional view taken along line G-G in fig. 3.
Detailed Description
The following is further detailed by way of specific embodiments:
reference numerals in the drawings of the specification include: the tower comprises a tower base 1, a tower kettle 2, a tower body 3, a stripping section 31, a rectifying section 32, a conical section 33, a tower top 4, a cylinder body 5, a flange 6, a lifting lug 7, a discharge pipe 8, a steam pipe 9, a notch 10, a support plate 11, a connecting pipe 12, a feed pipe 13, a discharge hole 14, a liquid distributor 15, a return pipe 16, a return distributor 17, a grid plate 18, an air outlet 19, a concave ring 20, a limiting ring 21, a flow guide strip 22 and a flow guide groove 23.
Example 1 is substantially as shown in figures 1, 2, 3, 4, 5 and 6 of the accompanying drawings:
a dehydration tower for recycling NMP waste liquid comprises a tower base 1, a tower kettle 2, a tower body 3 and a tower top 4 which are fixedly connected in sequence from bottom to top, wherein the tower base 1 is fixed on the ground through a bolt, the tower body 3 comprises a stripping section 31 and a rectifying section 32, wherein the rectifying section 32 is positioned above the stripping section 31, the diameter of the rectifying section 32 is 0.65-0.7 times of the diameter of the stripping section 31, the diameter of the stripping section 31 is 1m in the embodiment, the diameter of the rectifying section 32 is 0.7m, a tapered section 33 with a narrow top and a wide bottom is connected between the stripping section 31 and the rectifying section 32, the tower body 3 is formed by detachably connecting a plurality of barrel bodies 5, namely, the diameter of the cylinder constituting the stripping section 31 is 1m, and the diameter of the cylinder constituting the rectifying section 32 is 0.7m, the upper end and the lower end of each barrel 5 are respectively fixed with a flange 6, the adjacent flanges 6 are connected through bolts, and a group of lifting lugs 7 are symmetrically arranged on the side wall of the tower body 3 for convenient installation; a packing (shown by crossed broken lines in fig. 1) is also provided in each cylinder.
Bottom intercommunication at tower cauldron 2 has discharging pipe 8, discharging pipe 8 is used for discharging the heavy ends material after the dehydration, the intercommunication has steam pipe 9 on tower cauldron 2's the lateral wall, the tip that steam pipe 9 is located tower cauldron 2 inner end is the closed setting, breach 10 has been seted up on steam pipe 9, and breach 10 sets up down, be fixed with backup pad 11 between steam pipe 9 and the tower cauldron 2 inner wall, steam pipe 9 and reboiler intercommunication, tower cauldron 2's bottom is equipped with the connecting pipe 12 with the reboiler intercommunication, the higher material of boiling point gets into in the reboiler through connecting pipe 12 in the heavy ends after the vaporization, distill once more in steam pipe 9 gets into tower cauldron 2.
Be equipped with inlet pipe 13 on stripping section 31, the end seal of inlet pipe 13 one end is located tower body 3, a plurality of discharge openings 14 have been seted up along its axial in the bottom of inlet pipe 13, still be fixed with the liquid distributor 15 that is located inlet pipe 13 below in the tower body 3, be equipped with back flow 16 on the upper portion of tower body 3, the tower body 3 internal fixation has the backward flow distributor 17 that is located back flow 16 below, liquid distributor 15 all adopts the slot type distributor with backward flow distributor 17 in this embodiment, the slot type distributor includes the flow distribution box that the level set up, and a plurality of distributing grooves with the flow distribution box intercommunication.
In order to improve the rectification effect, a plurality of grid plates 18 are further fixed in the tower body 3, as shown in the figure 1, the grid plates 18 are respectively fixed below the steam pipe 9, the upper part and the lower part of the liquid distributor 15 and the lower part of the reflux distributor 17, the top of the tower top 4 is provided with an air outlet 19, the top of the tower top 4, the side wall of the tower body 3 and the side wall of the tower kettle 2 are respectively provided with a thermometer and a pressure gauge, and in addition, the side wall of the tower kettle 2 is also provided with a liquid level meter.
Referring to fig. 7, a sealing structure is arranged between adjacent cylinders 5, and the sealing structure includes a concave ring 20 welded on the top of the cylinder 5 and a limiting ring 21 welded on the bottom of the cylinder 5 and shaped like an inverted convex character, wherein the concave ring 20 on the adjacent cylinder 5 is connected with the limiting ring 21 in a matching manner. Set up like this and make the leakproofness between the barrel 5 improve to make the leakproofness of whole tower body 3 improve, prevent that the material of vaporization from leaking outward.
In this example, the treatment amount of the waste NMP liquid in the dehydration column was 2.5t/h, and the waste NMP liquid contained 81.5 wt% of NMP, 15.0 wt% of water, 1.70 wt% of N-methylsuccinimide, and 1.8 wt% of 5-hydroxy-N-methylpyrrolidone.
When the dehydration tower works, high-temperature steam generated by a reboiler is sent into a tower kettle 2 through a steam pipe 9, waste liquid is pumped into a tower body 3 through a feeding pipe 13, is dispersed under the action of a liquid distributor 15 and flows downwards to be contacted with the high-temperature steam in a stripping section 31, light component materials (such as water) in the waste liquid are quickly evaporated under the action of the high-temperature steam and flow upwards to enter a rectifying section 32, then enter a condenser arranged outside from a top air outlet 19 under the action of a reflux distributor 17, after the light component materials are condensed in the condenser, part of condensed liquid returns to a reflux tank arranged outside the dehydration tower again under the action of gravity flow or pressurization of a pump, and then enter the dehydration tower again under the action of the reflux distributor 17 through the reflux tank and a reflux pipe 16, the process is to ensure gas-liquid mass transfer and heat transfer in the dehydration tower, and the tank top of the reflux tank is connected to a vacuum pumping device through a pipeline, the dehydration tower is subjected to air exhaust treatment, so that the system is ensured to keep negative pressure operation, and the over-high pressure in the dehydration tower is prevented.
In addition, heavy component materials fall downwards and enter the tower kettle 2, one part of the heavy component materials entering the tower kettle 2 is discharged from a discharge pipe 8 at the bottom of the tower kettle 2, the other part of the heavy component materials enters the reboiler through a connecting pipe 12, the heavy component materials are vaporized under the action of the reboiler and then discharged into the tower kettle 2 again through a steam pipe 9, the heavy component materials are circularly distilled again, and sufficient gas phase is guaranteed for gas-liquid mass transfer and heat transfer in the dehydration tower.
Example 2 is substantially as shown in figure 8:
the difference from example 1 is that: still be equipped with the water conservancy diversion structure on the inner wall of toper section 33, specifically be, be fixed with many water conservancy diversion strips 22 along vertical on the inner wall of toper section 33, many water conservancy diversion strips 22 along the circumference equipartition of toper section 33, form guiding gutter 23 between the adjacent water conservancy diversion strip 22. The formation of the plurality of guide grooves 23 enables liquid beads which may be condensed on the inner wall of the conical section 33 to flow downward along the guide grooves 23 during the operation of the dehydration tower, enter the stripping section 31 again and be vaporized under the action of high-temperature steam, thereby completing the rectification.
The foregoing is merely an example of the present invention and common general knowledge of known specific structures and features of the embodiments is not described herein in any greater detail. It should be noted that, for those skilled in the art, without departing from the structure of the present invention, several changes and modifications can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicability of the patent. The scope of the claims of the present application shall be determined by the contents of the claims, and the description of the embodiments and the like in the specification shall be used to explain the contents of the claims.
Claims (10)
1. The utility model provides a NMP waste liquid is retrieved and is used dehydration tower, includes fixed connection's tower base, tower cauldron, tower body and top of the tower in proper order, its characterized in that: the bottom of the tower kettle is communicated with a discharge pipe, the side wall of the tower kettle is communicated with a steam pipe, the top of the tower is communicated with a gas outlet, filler is arranged in the tower body, the tower body comprises a rectification section and a stripping section, the rectification section is positioned above the stripping section, the diameter of the rectification section is 0.65-0.7 times of the diameter of the stripping section, the stripping section is provided with a feed pipe, the feed pipe is provided with a liquid distributor positioned in the tower body, the upper part of the rectification section is provided with a return pipe, and the return pipe is provided with a return distributor positioned in the tower body.
2. The dehydration column for NMP waste liquid recovery according to claim 1, characterized in that: a conical section is fixed between the rectifying section and the stripping section and is narrow at the top and wide at the bottom.
3. The dehydration column for NMP waste liquid recovery according to claim 2, characterized in that: be equipped with the water conservancy diversion structure on the inner wall of toper section, the water conservancy diversion structure includes many water conservancy diversion strips of fixing on toper section inner wall, and many vertical settings of water conservancy diversion strip, many water conservancy diversion strips form the guiding gutter along the circumference equipartition of toper section between the adjacent water conservancy diversion strip.
4. The dehydration column for NMP waste liquid recovery according to claim 1, characterized in that: the tower body comprises a plurality of cylinders, flange plates are fixed at the end parts of the cylinders, adjacent flange plates are connected through bolts, and fillers are arranged in the cylinders.
5. The dehydration column for recovering an NMP waste liquid according to claim 4, wherein: and a sealing structure is arranged between the adjacent cylinders, the sealing structure comprises a concave ring fixed at the top of the cylinder and a limiting ring fixed at the bottom of the cylinder and in an inverted convex shape, and the concave ring and the limiting ring on the adjacent cylinders are connected in a matching way.
6. The dehydration column for NMP waste liquid recovery according to claim 1, characterized in that: the liquid distributor and the reflux distributor are both groove-type distributors.
7. The dehydration column for NMP waste liquid recovery according to claim 1, characterized in that: the steam pipe is connected with a reboiler, and the bottom of the tower kettle is provided with a connecting pipe communicated with the reboiler.
8. The dehydration column for NMP waste liquid recovery according to claim 8, characterized in that: the end part of the steam pipe, which is positioned at one end in the tower kettle, is sealed, and the steam pipe is provided with a notch which is arranged downwards.
9. The dehydration tower for recovering an NMP waste liquid according to any one of claims 1 to 8, wherein: a plurality of grid plates are fixed in the tower body and are respectively positioned above the steam pipe, above and below the liquid distributor and below the reflux distributor.
10. The dehydration column for NMP waste liquid recovery according to claim 9, characterized in that: the tip that the inlet pipe is located one end in the tower body is sealed setting, a plurality of discharge openings have been seted up along its axial in the inlet pipe bottom.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911368082.4A CN111167146A (en) | 2019-12-26 | 2019-12-26 | NMP waste liquid is retrieved with dehydration tower |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911368082.4A CN111167146A (en) | 2019-12-26 | 2019-12-26 | NMP waste liquid is retrieved with dehydration tower |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111167146A true CN111167146A (en) | 2020-05-19 |
Family
ID=70619799
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911368082.4A Pending CN111167146A (en) | 2019-12-26 | 2019-12-26 | NMP waste liquid is retrieved with dehydration tower |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111167146A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113521782A (en) * | 2021-08-24 | 2021-10-22 | 安徽晟捷新能源科技有限公司 | Be used for NMP to retrieve refined reactor |
| CN115819311A (en) * | 2022-05-17 | 2023-03-21 | 重庆市中润化学有限公司 | GBL heavy component recycling method |
Citations (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02160833A (en) * | 1988-12-14 | 1990-06-20 | Toray Philips Petorooriamu Kk | Production of polyarylene sulfide |
| CN2863215Y (en) * | 2005-12-26 | 2007-01-31 | 山东玉皇化工有限公司 | Distributor for filling tower |
| CN101544913A (en) * | 2009-05-04 | 2009-09-30 | 济南冶金化工设备有限公司 | Process and equipment for negative pressure benzene removal |
| CN102482213A (en) * | 2009-09-14 | 2012-05-30 | 三菱化学工程株式会社 | Nmp distilling apparatus |
| CN203227315U (en) * | 2013-04-24 | 2013-10-09 | 中冶焦耐工程技术有限公司 | Recovery tower |
| CN105169734A (en) * | 2015-08-14 | 2015-12-23 | 长岭炼化岳阳工程设计有限公司 | Vacuum rectification device and rectification method thereof |
| CN105194899A (en) * | 2015-10-16 | 2015-12-30 | 青岛科技大学 | Variable-diameter rectifying device and method for separating methylbenzene-isobutylbenzene mixture |
| CN205886484U (en) * | 2016-07-19 | 2017-01-18 | 安徽广信农化股份有限公司 | Be used for pyraclostrobin production to use gas -liquid separation |
| CN106831526A (en) * | 2017-02-22 | 2017-06-13 | 岳阳市德立机械设备有限公司 | Reclaim, purify the device and method of N methyl pyrrolidones |
| CN107382810A (en) * | 2017-02-22 | 2017-11-24 | 岳阳市德立机械设备有限公司 | Purify the device and method of N methyl pyrrolidones |
| CN107403960A (en) * | 2016-05-19 | 2017-11-28 | 张建岗 | NMP in working procedure of coating lithium ion cell recovery essence steams purification recycling device |
| CN107715491A (en) * | 2017-11-21 | 2018-02-23 | 滨化集团股份有限公司 | A kind of chlorine refines process units |
| CN207654737U (en) * | 2017-09-25 | 2018-07-27 | 路桂英 | A kind of novel ammonium sulfate decyanation tower |
| CN207654736U (en) * | 2017-09-25 | 2018-07-27 | 路桂英 | A kind of novel distillation tower |
| CN109157859A (en) * | 2018-09-25 | 2019-01-08 | 无锡科伦达化工热力装备有限公司 | A kind of fatty acid vacuum (distilling) column |
| CN208814924U (en) * | 2018-07-17 | 2019-05-03 | 天津中福环保科技股份有限公司 | The equipment of the accurate processing of NMP recycling purification in a kind of production of lithium battery |
| CN109851501A (en) * | 2019-03-20 | 2019-06-07 | 江苏索普（集团）有限公司 | Ethyl acetate integration system is for tower |
-
2019
- 2019-12-26 CN CN201911368082.4A patent/CN111167146A/en active Pending
Patent Citations (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02160833A (en) * | 1988-12-14 | 1990-06-20 | Toray Philips Petorooriamu Kk | Production of polyarylene sulfide |
| CN2863215Y (en) * | 2005-12-26 | 2007-01-31 | 山东玉皇化工有限公司 | Distributor for filling tower |
| CN101544913A (en) * | 2009-05-04 | 2009-09-30 | 济南冶金化工设备有限公司 | Process and equipment for negative pressure benzene removal |
| KR101709101B1 (en) * | 2009-09-14 | 2017-02-22 | 미츠비시 가가쿠 엔지니어링 가부시키가이샤 | Nmp distilling apparatus |
| CN102482213A (en) * | 2009-09-14 | 2012-05-30 | 三菱化学工程株式会社 | Nmp distilling apparatus |
| CN203227315U (en) * | 2013-04-24 | 2013-10-09 | 中冶焦耐工程技术有限公司 | Recovery tower |
| CN105169734A (en) * | 2015-08-14 | 2015-12-23 | 长岭炼化岳阳工程设计有限公司 | Vacuum rectification device and rectification method thereof |
| CN105194899A (en) * | 2015-10-16 | 2015-12-30 | 青岛科技大学 | Variable-diameter rectifying device and method for separating methylbenzene-isobutylbenzene mixture |
| CN107403960A (en) * | 2016-05-19 | 2017-11-28 | 张建岗 | NMP in working procedure of coating lithium ion cell recovery essence steams purification recycling device |
| CN205886484U (en) * | 2016-07-19 | 2017-01-18 | 安徽广信农化股份有限公司 | Be used for pyraclostrobin production to use gas -liquid separation |
| CN106831526A (en) * | 2017-02-22 | 2017-06-13 | 岳阳市德立机械设备有限公司 | Reclaim, purify the device and method of N methyl pyrrolidones |
| CN107382810A (en) * | 2017-02-22 | 2017-11-24 | 岳阳市德立机械设备有限公司 | Purify the device and method of N methyl pyrrolidones |
| CN207654737U (en) * | 2017-09-25 | 2018-07-27 | 路桂英 | A kind of novel ammonium sulfate decyanation tower |
| CN207654736U (en) * | 2017-09-25 | 2018-07-27 | 路桂英 | A kind of novel distillation tower |
| CN107715491A (en) * | 2017-11-21 | 2018-02-23 | 滨化集团股份有限公司 | A kind of chlorine refines process units |
| CN208814924U (en) * | 2018-07-17 | 2019-05-03 | 天津中福环保科技股份有限公司 | The equipment of the accurate processing of NMP recycling purification in a kind of production of lithium battery |
| CN109157859A (en) * | 2018-09-25 | 2019-01-08 | 无锡科伦达化工热力装备有限公司 | A kind of fatty acid vacuum (distilling) column |
| CN109851501A (en) * | 2019-03-20 | 2019-06-07 | 江苏索普（集团）有限公司 | Ethyl acetate integration system is for tower |
Non-Patent Citations (1)
| Title |
|---|
| 贾绍义: "《化工原理课程设计》", 30 August 2002, 天津大学出版社 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113521782A (en) * | 2021-08-24 | 2021-10-22 | 安徽晟捷新能源科技有限公司 | Be used for NMP to retrieve refined reactor |
| CN115819311A (en) * | 2022-05-17 | 2023-03-21 | 重庆市中润化学有限公司 | GBL heavy component recycling method |
| CN115819311B (en) * | 2022-05-17 | 2023-11-07 | 重庆中润新材料股份有限公司 | GBL heavy component recycling method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111170919B (en) | NMP waste liquid recovery process | |
| CN101230283B (en) | Oil shale retorting process reclaiming method | |
| CN111167146A (en) | NMP waste liquid is retrieved with dehydration tower | |
| CN103351321B (en) | The continuous production method of a kind of NMP | |
| CN108218756A (en) | A kind of NMP waste water low temperature recovery system and its method | |
| CN208893656U (en) | The equipment of NMP recycling heat pump distillation in a kind of production of lithium electricity | |
| CN108546243A (en) | A kind of lithium battery production double tower NMP recycling purification systems and its recycling method of purification | |
| CN108654130A (en) | The method and apparatus of NMP recycling heat pump distillation in a kind of production of lithium electricity | |
| CN207811625U (en) | A kind of NMP Mead-Bauer recovery systems | |
| CN103301717B (en) | Double-tower integrated recovery device and method for micro-acetone-contained air | |
| CN109942136A (en) | The processing system and technique of UTILIZATION OF VESIDUAL HEAT IN after the gas-fired of a kind of pair of semi-coke wastewater and coal gas power plant | |
| CN213924578U (en) | Dichloromethane recovery device in production process of wet lithium battery diaphragm | |
| CN211752585U (en) | NMP is with high-efficient type dehydration tower | |
| CN104357096B (en) | Efficient energy-saving gas purifying treatment method | |
| CN105669345B (en) | A kind of complete set of equipments of the depth separating methanol of carbon four and water | |
| CN109173318B (en) | Energy-saving solvent high-efficiency separation combined evaporator | |
| CN2127940Y (en) | Forced circulation type hydrogen oxygen generator | |
| CN102964262A (en) | DMF (dimethyl formamide) recovery device and method in production of synthetic leather | |
| CN202942672U (en) | DMF (Dimethyl Formamide) recovering device in production of synthetic leather | |
| CN112174773A (en) | Dichloromethane recovery device and method in wet lithium battery diaphragm production process | |
| CN208865214U (en) | One kind being used for supercritical CO2The mass transfer system of extracting rectifying | |
| CN203479046U (en) | Device for recycling condensate steam in process of production | |
| CN208604047U (en) | The equipment of NMP recycling purification in a kind of production of lithium battery | |
| CN216703401U (en) | High-efficient composite set that retrieves of solvent chlorobenzene in naphthol production | |
| CN221286926U (en) | Stripping deamination tower |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20200519 |