CN204224499U - A kind of film produces the device that in waste liquid, N,N-DIMETHYLACETAMIDE reclaims - Google Patents
A kind of film produces the device that in waste liquid, N,N-DIMETHYLACETAMIDE reclaims Download PDFInfo
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- CN204224499U CN204224499U CN201420457970.XU CN201420457970U CN204224499U CN 204224499 U CN204224499 U CN 204224499U CN 201420457970 U CN201420457970 U CN 201420457970U CN 204224499 U CN204224499 U CN 204224499U
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- dimethylacetamide
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Abstract
The utility model discloses a kind of film and produce the device that in waste liquid, N,N-DIMETHYLACETAMIDE reclaims, have employed the technique that rectification under vacuum combines with side take-off, obtain high purity DMAC, this device mainly comprises vaporizer, dehydration tower, product DMAC treating tower.It is characterized in that: vaporizer, dehydration tower, product DMAC treating tower negative-pressure operation; Vaporizer is provided with separate chamber, and dehydration tower is provided with condenser and reboiler; Product DMAC treating tower is provided with condenser, does not establish reboiler; The charging of product DMAC treating tower is dehydration tower side take-off.The reality that the utility model is produced from film, studies the recovery process of DMAC, final design gone out equipment simple, easy to operate, invest less DMAC retrieving arrangement.In addition, at the bottom of DMAC treating tower tower, charging is dehydration tower side take-off, has saved energy consumption, has decreased facility investment.
Description
Technical field
The utility model relates to film production process solvent recuperation field and rectification under vacuum field, particularly relates to a kind of device reclaiming N,N-DIMETHYLACETAMIDE from film production waste liquid.
Background technology
N,N-DIMETHYLACETAMIDE (DMAC) is a kind of colourless transparent liquid, can mix, as alcohol, ketone, ether, ester etc. with multiple organic solvent.For " menstruum universale " dimethyl formamide, because N,N-DIMETHYLACETAMIDE introduces ethyl in the molecular structure, it has better thermostability and chemical stability.
Current technique comparatively advanced in tunica fibrosa is produced take DMAC as the wet processing of solvent, and in this technique, the consumption of DMAC is very large.DMAC consumption in tunica fibrosa industrial production is large, and market value is higher, and it has toxicity again, in production, uses and enters water body in disposal process and can cause very large impact to water quality environment, the health of harm people.Therefore in producing tunica fibrosa, the recovery of DMAC waste liquid and process have important protection of the environment and reduce the meaning of the aspects such as production cost of enterprise.
At present, in the producing about film of document and Patents report, the method for recovery of DMAC waste liquid adopts rectifying tower distillation DMAC waste liquid to reach the object reclaiming DMAC, but the problem of the aspect such as the rectificating method floor space of routine is large, cost of equipment is high.In addition, because DMAC is higher than the boiling point of water, adopt rectifying tower distillation DMAC waste liquid to carry out DMAC recovery, need to process a large amount of water, and the latent heat of water is comparatively large, therefore this method process waste water energy consumption is comparatively large, and economy is poor; In batch distillation process, salt often blocks interchanger simultaneously, and equipment life is shorter.
Therefore, for the deficiency that the above technology exists, the processing unit designing reasonably process DMAC waste liquid has important environmental benefit and economic benefit.To sum up, designing that high safety, energy consumption are low, simple to operate, DMAC rate of recovery equipment, is a problem being worth research.
Summary of the invention
The utility model is for DMAC waste liquid in film manufacture process, propose the device that a kind of rectification under vacuum technology and side take-off combine to reclaim DMAC waste liquid in film industry, this processing unit mainly comprises vaporizer, dehydration tower, product DMAC treating tower, this utility model comparatively prior art significantly can reduce energy consumption, reduces process cost.
In order to realize above-mentioned utility model, the technical scheme that the utility model provides is: a kind of film produces the device that in waste liquid, N,N-DIMETHYLACETAMIDE reclaims, and comprises vaporizer, dehydration tower, product DMAC treating tower.The feature of this purification and recover DMAC device is: vaporizer, dehydration tower, product DMAC treating tower negative-pressure operation; Vaporizer is provided with separate chamber, and dehydration tower is provided with condenser and reboiler; Product DMAC treating tower is provided with condenser, does not establish reboiler; Dehydration tower adopts side take-off technology, and the charging of product DMAC treating tower is dehydration tower side take-off, and tower reactor discharging is circulated back to dehydration tower.
Produce from film the device reclaiming N,N-DIMETHYLACETAMIDE waste liquid, be described as follows:
1) the waste liquid DMAC that a kind of film produces in producing squeezes in the separate chamber (2) of vaporizer (3) after feed preheater (1) preheating;
2) raw material vapour phase after separate chamber is separated enters dehydration tower (4), and liquid phase enters vaporizer (3), gets back to separate chamber (2) carry out enterprise's separation, vaporizer negative-pressure operation through evaporation Posterior circle;
3) enter dehydration tower (4) and be provided with reboiler (5) and condenser (6), after entering the stream stock-traders' know-how rectification under vacuum of dehydration tower (4), vapor stream of top of the tower stock flows into the return tank (7) of dehydration tower (4) after entering condenser (6) condensation, return tank (7) is provided with two interfaces, one connects water pot as tower top discharging, and a connection dehydration tower (4) is as backflow; Tower reactor discharging enters high boiling material treatment system through reboiler (5) heating rear portion as tower reactor discharging, and a part is circulated back to dehydration tower (4) tower reactor; Dehydration tower (4) tower body is provided with side take-off site;
4) product DMAC treating tower (8) charging site connects the lateral line discharging site of dehydration tower (4), overhead vapours enters return tank (10) after condenser (9) condensation, return tank (10) is provided with three outlets, one connects product DMAC treating tower (8) and refluxes, a charging site of a connection dehydration tower (4), be circulated back to dehydration tower (4), one connects product DMAC condenser (11); Product DMAC treating tower (8) does not establish reboiler, and tower reactor liquid discharge nozzle line connects dehydration tower (4) side entry feed site, is circulated back to dehydration tower (4).
Described raw material DMAC content is 10%-30%.
Described vaporizer, dehydration tower, product DMAC treating tower are equipped with vacuum pipe, make its negative-pressure operation.
The low-temperature receiver of described condenser all uses recirculated water, is connected with circulating water pipeline.
Described reboiler and vaporizer, using steam as thermal source, are connected with steam-pipe.
Described dehydration tower side take-off be vapor-phase material, ensure that the charging of product DMAC treating tower tower reactor is vapour phase.
Described product DMAC treating tower does not establish reboiler, with dehydration tower side take-off for charging.
In sum, the utility model has following beneficial effect:
1) the utility model considers the physico-chemical property of DMAC, and boiling point is higher, and whole technological process negative-pressure operation, reduces service temperature, and ensure that stability and the security of equipment;
2) this process unit level of automation is high, simple to operate easy to control;
3) adopt lateral line discharging technology, product DMAC treating tower does not establish reboiler, makes equipment simple, decreases facility investment simultaneously, reduces energy consumption;
4) the utility model is through two-tower rectification, and the product DMAC purity obtained is high, has stopped lower concentration DMAC and has directly discharged, had important environmental benefit.
The utility model is designed by rational, solvent DMAC in energy efficient recovery, purification film art production process.Whole technique have device security stable, easy to operate, invest the advantages such as less, energy efficient, be conducive to Reducing Cost in Enterprises, increase economic efficiency, therefore, the process program that the utility model proposes is a kind of efficiently feasible DMAC retrieving arrangement.Use this device, make the purity of the DMAC reclaimed reach more than 99.5%, and the requirement to solvent DMAC in film production process can be met.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model;
In figure, 1 is feed preheater, 2 is the separate chamber of vaporizer, 3 is vaporizer, and 4 is dehydration tower, and 5 is the reboiler of dehydration tower, 6 is the condenser of dehydration tower, 7 is the return tank of condenser, and 8 is product DMAC treating tower, and 9 is the condenser of product DMAC treating tower, 10 is the return tank of product DMAC treating tower, and 11 is product DMAC condenser.
Embodiment
Below in conjunction with accompanying drawing and concrete case study on implementation, the utility model is described further.
Fig. 1 is structural representation of the present utility model, and working process is specific as follows:
Raw material (in film production process DMAC waste liquid) is after feed preheater (1) preheating, the separate chamber (2) entering vaporizer (3) carries out vapour phase input dehydration tower (4) after vapor-liquid separation, liquid phase is returned separate chamber (2) after entering vaporizer (3) evaporation and is carried out vapor-liquid separation, liquid phase circulates between vaporizer (3) and separate chamber (2), and vapour phase input dehydration tower is as charging; Enter the material stream of dehydration tower (4) after rectifying, overhead vapours flows into the return tank (7) of dehydration tower (4) after condenser (6) condensation, the stream stock part entering return tank (7) returns dehydration tower (4) as backflow, a part enters water pot as overhead extraction, tower reactor discharging enters high boiling material treatment system through reboiler (5) rear portion as tower reactor discharging, a part is circulated back to dehydration tower (4) tower reactor, and lateral line discharging is as product DMAC treating tower (8) tower reactor charging; Enter the material stream of product DMAC treating tower (8) after rectifying, overhead vapours enters return tank (10) after condenser (9) condensation, return tank (10) is provided with three outlets, one connects product DMAC treating tower (8) and refluxes, a connection dehydration tower side line side entry feed site, be circulated back to dehydration tower (4), one connects product DMAC condenser, and condensed material enters product DMAC holding tank; Product DMAC treating tower (8) does not establish reboiler, and tower reactor liquid discharge nozzle line connects dehydration tower (4) side entry feed site, is circulated back to dehydration tower (4).
Above-described embodiment; just preferred embodiment of the present utility model; the utility model is not limited to described embodiment; the related personnel of this area is not departing from the utility model scope of disclosure; make some to the utility model change and revise, all should be included in protection domain of the present utility model.
Claims (4)
1. film produces the device that in waste liquid, N,N-DIMETHYLACETAMIDE reclaims, and comprises vaporizer, dehydration tower, product N,N-DIMETHYLACETAMIDE treating tower, it is characterized in that: dehydration tower side take-off is as the charging of product N,N-DIMETHYLACETAMIDE treating tower.
2. a kind of film according to claim 1 produces the device that in waste liquid, N,N-DIMETHYLACETAMIDE reclaims, and it is characterized in that vaporizer, dehydration tower, product N,N-DIMETHYLACETAMIDE treating tower are equipped with vacuum pipe, makes its negative-pressure operation.
3. a kind of film according to claim 1 and 2 produces the device that in waste liquid, N,N-DIMETHYLACETAMIDE reclaims, and it is characterized in that dehydration tower is provided with side line discharge and side entry feed mouth.
4. a kind of film according to claim 1 and 2 produces the device that in waste liquid, N,N-DIMETHYLACETAMIDE reclaims, it is characterized in that product N,N-DIMETHYLACETAMIDE treating tower tower reactor does not establish reboiler, charging is the side take-off of dehydration tower, and feed entrance point is located at tower reactor, and tower reactor discharging is circulated back to dehydration tower.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420457970.XU CN204224499U (en) | 2014-08-14 | 2014-08-14 | A kind of film produces the device that in waste liquid, N,N-DIMETHYLACETAMIDE reclaims |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420457970.XU CN204224499U (en) | 2014-08-14 | 2014-08-14 | A kind of film produces the device that in waste liquid, N,N-DIMETHYLACETAMIDE reclaims |
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| CN204224499U true CN204224499U (en) | 2015-03-25 |
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| CN201420457970.XU Expired - Fee Related CN204224499U (en) | 2014-08-14 | 2014-08-14 | A kind of film produces the device that in waste liquid, N,N-DIMETHYLACETAMIDE reclaims |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106045872A (en) * | 2016-06-06 | 2016-10-26 | 南京工业大学 | Recovery system and method for dimethylformamide waste liquid by pervaporation method |
| CN109111005A (en) * | 2018-09-19 | 2019-01-01 | 四川久润环保科技有限公司 | A kind of method and system of the high purity DMAC from industrial wastewater |
| CN111100027A (en) * | 2018-10-25 | 2020-05-05 | 中国石油化工股份有限公司 | Method for recovering N, N-dimethylacetamide |
| CN112142140A (en) * | 2019-06-28 | 2020-12-29 | 中国石油化工股份有限公司 | Waste water recovery device and method in nanofiltration membrane production |
| CN112142618A (en) * | 2019-06-28 | 2020-12-29 | 中国石油化工股份有限公司 | Low-concentration dimethyl formamide wastewater recovery system and method |
-
2014
- 2014-08-14 CN CN201420457970.XU patent/CN204224499U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106045872A (en) * | 2016-06-06 | 2016-10-26 | 南京工业大学 | Recovery system and method for dimethylformamide waste liquid by pervaporation method |
| CN106045872B (en) * | 2016-06-06 | 2018-04-27 | 南京工业大学 | Recovery system and method for dimethylformamide waste liquid by pervaporation method |
| CN109111005A (en) * | 2018-09-19 | 2019-01-01 | 四川久润环保科技有限公司 | A kind of method and system of the high purity DMAC from industrial wastewater |
| CN111100027A (en) * | 2018-10-25 | 2020-05-05 | 中国石油化工股份有限公司 | Method for recovering N, N-dimethylacetamide |
| CN112142140A (en) * | 2019-06-28 | 2020-12-29 | 中国石油化工股份有限公司 | Waste water recovery device and method in nanofiltration membrane production |
| CN112142618A (en) * | 2019-06-28 | 2020-12-29 | 中国石油化工股份有限公司 | Low-concentration dimethyl formamide wastewater recovery system and method |
| CN112142618B (en) * | 2019-06-28 | 2023-07-21 | 中国石油化工股份有限公司 | Low-concentration dimethylformamide wastewater recovery system and method |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 300384 Alex Hua Tian Road, Nankai District, Nankai District, Tianjin, No. 2 International Entrepreneurship Center 4023 Patentee after: Tianjin Zhongfu environmental Polytron Technologies Inc Address before: 300384 Alex Hua Tian Road, Nankai District, Nankai District, Tianjin, No. 2 International Entrepreneurship Center 4023 Patentee before: TIANJIN ZHONGFU ENGINEERING TECHNOLOGY CO., LTD. |
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| CP01 | Change in the name or title of a patent holder | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150325 Termination date: 20200814 |
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| CF01 | Termination of patent right due to non-payment of annual fee |