CN203639619U - Spandex dry spinning medium circulation system - Google Patents
Spandex dry spinning medium circulation system Download PDFInfo
- Publication number
- CN203639619U CN203639619U CN201320856826.9U CN201320856826U CN203639619U CN 203639619 U CN203639619 U CN 203639619U CN 201320856826 U CN201320856826 U CN 201320856826U CN 203639619 U CN203639619 U CN 203639619U
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- CN
- China
- Prior art keywords
- membrane separator
- heat exchanger
- dry spinning
- pipeline
- polyurethane fiber
- 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.)
- Expired - Lifetime
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- 238000000578 dry spinning Methods 0.000 title claims abstract description 38
- 229920002334 Spandex Polymers 0.000 title abstract description 10
- 239000004759 spandex Substances 0.000 title abstract description 10
- 239000012528 membrane Substances 0.000 claims abstract description 56
- MHABMANUFPZXEB-UHFFFAOYSA-N O-demethyl-aloesaponarin I Natural products O=C1C2=CC=CC(O)=C2C(=O)C2=C1C=C(O)C(C(O)=O)=C2C MHABMANUFPZXEB-UHFFFAOYSA-N 0.000 claims abstract description 40
- 238000009987 spinning Methods 0.000 claims abstract description 27
- 239000012530 fluid Substances 0.000 claims abstract description 13
- 239000007788 liquid Substances 0.000 claims abstract description 13
- 238000000926 separation method Methods 0.000 claims abstract description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 11
- 238000003860 storage Methods 0.000 claims abstract description 7
- 229920006306 polyurethane fiber Polymers 0.000 claims description 30
- 230000008676 import Effects 0.000 claims description 5
- 238000000034 method Methods 0.000 abstract description 25
- 238000001816 cooling Methods 0.000 abstract description 12
- 230000008569 process Effects 0.000 abstract description 8
- 238000011084 recovery Methods 0.000 abstract description 8
- 238000005265 energy consumption Methods 0.000 abstract description 4
- 239000002826 coolant Substances 0.000 abstract 1
- 239000000498 cooling water Substances 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 37
- 239000008246 gaseous mixture Substances 0.000 description 16
- 238000005516 engineering process Methods 0.000 description 10
- 239000002904 solvent Substances 0.000 description 9
- 238000007599 discharging Methods 0.000 description 7
- 238000010438 heat treatment Methods 0.000 description 7
- 230000008901 benefit Effects 0.000 description 5
- 238000009833 condensation Methods 0.000 description 5
- 230000005494 condensation Effects 0.000 description 5
- 229920006395 saturated elastomer Polymers 0.000 description 4
- JOYRKODLDBILNP-UHFFFAOYSA-N Ethyl urethane Chemical compound CCOC(N)=O JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 description 3
- 238000009792 diffusion process Methods 0.000 description 3
- 210000004177 elastic tissue Anatomy 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 238000010791 quenching Methods 0.000 description 3
- 239000003507 refrigerant Substances 0.000 description 3
- 238000009738 saturating Methods 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 230000001174 ascending effect Effects 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 239000003814 drug Substances 0.000 description 2
- 238000007380 fibre production Methods 0.000 description 2
- 235000011194 food seasoning agent Nutrition 0.000 description 2
- 239000003595 mist Substances 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- NLHHRLWOUZZQLW-UHFFFAOYSA-N Acrylonitrile Chemical compound C=CC#N NLHHRLWOUZZQLW-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 238000002309 gasification Methods 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- WFKAJVHLWXSISD-UHFFFAOYSA-N isobutyramide Chemical compound CC(C)C(N)=O WFKAJVHLWXSISD-UHFFFAOYSA-N 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 229920002994 synthetic fiber Polymers 0.000 description 1
- 239000012209 synthetic fiber Substances 0.000 description 1
- 230000026676 system process Effects 0.000 description 1
- 239000004753 textile Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
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- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The utility model provides a spandex dry spinning medium circulation system which comprises a heat exchanger and a membrane separator. A gas separation membrane is arranged in the membrane separator. A heat side inlet of the heat exchanger is connected with a vent gas outlet of a spandex dry spinning system spinning shaft through a pipeline, and a heat side outlet of the heat exchanger is connected with a gas inlet of the membrane separator through a pipeline. A gas exhaust outlet of the membrane separator is connected with a cold fluid inlet of the heat exchanger through a pipeline, a cold fluid outlet of the heat exchanger is connected to a gas inlet of the spandex dry spinning system spinning shaft through a pipeline, and a liquid outlet in the bottom of the membrane separator is connected to a DMAC storage pot through a pipeline. According to the spandex dry spinning medium circulation system, multiple stages of cooling processes of circulation water cooling, cooling water cooling and coolant cooling can be omitted, the technological process is simple, operation is convenient, the recovery rate is high, and energy consumption is reduced.
Description
Technical field
The utility model relates to field of textiles polyurethane fiber dry spinning system solvent recovery and medium circulation, specifically a kind of polyurethane fiber dry spinning medium circulation system.
Background technology
N, N-dimethylacetylamide is called for short DMAC, is the solvent of important Organic Chemicals, medicine intermediate, function admirable, mainly as the solvent in heat-resisting synthetic fiber, plastic sheeting, coating, medicine, acrylonitrile spinning technique.
Polyurethane fibre industry is produced over half a century, enters China's two more than ten years.Spandex has solution dry method, solution wet method, extrusion by melting and chemical reaction method according to spinning process, due to advantages such as dry spinning have good quality of product, intensity is high, elastic restoration ratio good, widely applicable, output is large, therefore occupy an leading position in global urethane elastic fiber production technology.The early stage spandex manufacturer that independently has in the world polyurethane fiber dry spinning technology has: Dupont, Bayer Bitterfeld GmbH, Japanese Japan are spun, Japanese Asahi Chemical Industry, toray etc., the spandex production technology of China is mainly derived from the technology export of above-mentioned company, due to the confidentiality of technology, domestic cannot understanding in depth this technology, in native land, existing spandex enterprise almost indiscriminately imitates foreign technology construction completely and forms, and this technology is not changed.
In urethane elastic fiber production technology, dry spinning operation can produce a large amount of DMAC and the gaseous mixture of thermal medium, adopt cost-effective technique reclaim the DMAC solvent in gaseous mixture and carry out medium circulation use, be even more important to reducing energy consumption, the economic benefit that improves enterprise and social benefit and reducing environmental pollution.In polyurethane fiber dry spinning medium circulation system, conventional method used is condensation method+heating at present, is specially: the DMAC that spinning shaft is discharged and the gaseous mixture of medium are cooled to 2-20 ℃ step by step, and gaseous state DMAC is condensed into liquid state.After liquid DMAC is separated, converge to DMAC storage tank, deliver to follow-up refining step.In condensed gaseous mixture, still contain a small amount of DMAC, this gas (is generally needed to Multi-stage heating) step by step and be heated to 230-265 ℃, deliver to spinning shaft, carry out the solvent seasoning in spinning solution as hot blast.Need to be first by after cooling gaseous mixture extremely lower temperature, stepped heating is to higher temperature again by this method, its shortcoming is that energy consumption is large, operation is loaded down with trivial details, equipment complexity, the rate of recovery is low, and operating cost is high.
Utility model content
Technical problem to be solved in the utility model is, overcome the shortcoming of prior art, a kind of polyurethane fiber dry spinning medium circulation system is provided, can save the cooling multistage refrigerating work procedure of circulating water, water quench and refrigerant, and technical process is simple, easy to operate, the rate of recovery is high, energy efficient.
The technical scheme that the utility model solves above technical problem is:
A kind of polyurethane fiber dry spinning medium circulation system, comprises heat exchanger and membrane separator, and gas separation membrane is housed in membrane separator; The hot side-entrance that heat exchanger has connects polyurethane fiber dry spinning system spinning shaft by pipeline and discharges gas outlet, the gas feed that the hot side outlet that heat exchanger has has by pipeline junctional membrane separator, the gas discharge outlet that membrane separator has connects by pipeline the cold fluid import that described heat exchanger has, the cold fluid outlet that heat exchanger has is connected to the gas feed of polyurethane fiber dry spinning system spinning shaft by pipeline, and the liquid outlet that membrane separator bottom has is connected to DMAC storage tank by pipeline.
Like this, by membrane separator, the DMAC component in the gaseous mixture after cooling is carried out effectively separating and enrichment, the side that sees through of gas separation membrane is mainly the DMAC of high concentration, thoroughly remaining side is the dielectric gas that contains micro-DMAC, separating obtained DMAC is sent to DMAC storage tank, remaining medium returns to spinning shaft after rising to uniform temperature, is dried the solvent in spinning solution as hot blast.
For the shortcoming of conventional spandex dry spinning medium circulation system, the process that this utility model mainly adopts heat exchanger (group)+film to separate, the nucleus equipment in heat exchanger (group) is heat pipe.Heat pipe is to rely on self internal work liquid phase-change to realize the heat transfer element of heat transfer, has very high thermal conductivity, the good advantage such as isothermal, heat flow density changeability.In new polyurethane fiber dry spinning medium circulation system, heat pipe is as heat transfer intermediate, and the heat discharging when the gaseous mixture that spinning shaft is discharged is lowered the temperature reclaims effectively, and the heat of recovery, for adding the gaseous mixture after thermal release DMAC, is reached to energy-conservation object.The operation principle that film separates is to utilize film to realize both physical separation to the selection permeability of mist.Mist, under both sides differential pressure of membrane promotes, is followed dissolving diffusion mechanism, makes organic gas preferentially see through film and is able to enriching and recovering, and medium is selectively held back compared with condensation method, and the film separation rate of recovery is high, energy consumption is low, operating cost is low and security of operation.
The utility model polyurethane fiber dry spinning medium circulation system, heat exchanger (group)+membrane separation process system, has technical process simple, and easy to operate, the rate of recovery is high, and energy efficient is easy to realize the advantages such as industrialization.
Another technical problem that the utility model need to solve is: how to make directly to become liquid state from gaseous state by the DMAC seeing through in gas of membrane separator, be convenient to collect.In order to solve this technical problem, the application, by connect a vavuum pump by pipeline on membrane separator, is adjusted to 10-95kPa by vavuum pump by vacuum in membrane separator; Like this, under the vacuum state limiting, the vapour pressure of DMAC in gas that sees through of membrane separator is greater than the saturated vapor pressure through DMAC under temperature degree, therefore after the DMAC of gaseous state sees through film, direct saturated condensation, gets twice the result with half the effort.As can be seen here, the utility model science on membrane separator, be connected to vavuum pump, by regulating vacuum to make the DMAC seeing through in gas directly become liquid state from gaseous state, the collection problem of the DMAC solving cleverly.
The technical scheme that the utility model further limits is:
Aforesaid polyurethane fiber dry spinning medium circulation system, wherein in the connecting pipe between hot side outlet and the gas feed of described membrane separator of heat exchanger, be connected to cooler, further cooling for do not reach required decline temperature after high-temperature gas mixture is by heat exchanger time.In connecting pipe between the cold fluid outlet of heat exchanger and the gas feed of polyurethane fiber dry spinning system spinning shaft, be connected to heater, the further heating for do not reach required ascending temperature after the saturating residual air of heated air diffusion barrier is by heat exchanger time.
Aforesaid polyurethane fiber dry spinning medium circulation system, wherein heat exchanger is heat pipe, heater or cooler.
Aforesaid polyurethane fiber dry spinning medium circulation system, wherein membrane separator, its tank shape is vertical tank, horizontal tank, spherical tank or tapered shaped can.
Aforesaid polyurethane fiber dry spinning medium circulation system, its intermediate pump is water ring vacuum pump, screw vacuum pump, reciprocating pump, Roots vaccum pump or gear pump.
Compared with prior art, the utlity model has following characteristics:
(1) method described in the utility model can effectively separate and reclaim that corridor for spinning of urethane elastic fiber is discharged DMAC organic solvent in gas and by medium circulation utilization, for polyurethane fiber dry spinning medium circulation system made new method.
(2) method described in the utility model adopts heat exchanger (group) to separate the technique combining with film, this technical process is simple, easy to operate, the liquid DMAC that can directly obtain, compared with technique in the past, save the cooling multistage refrigerating work procedure of circulating water, water quench and refrigerant.
(3) method good separating effect described in the utility model, energy efficient, and energy is fully utilized effectively.
In a word, the DMAC that the utility model is discharged using spinning shaft and the gaseous mixture of medium are as handling object, the process system separating with film by heat exchanger (group) reclaims the DMAC in gaseous mixture, the DMAC solvent that is higher degree through gas of film, separating obtained DMAC is sent to DMAC storage tank, remaining medium returns to spinning shaft after rising to uniform temperature, is dried the solvent in spinning solution as hot blast.The utility model, compared with traditional medium circulation system, has saved the cooling multistage refrigerating work procedure of circulating water, water quench and refrigerant.This system process process is simple, easy to operate, and the rate of recovery is high, and energy efficient is easy to realize industrialization.
Accompanying drawing explanation
Fig. 1 is system connection layout of the present utility model.
The specific embodiment
The present embodiment is a kind of polyurethane fiber dry spinning medium circulation system, comprises heat exchanger 1 and membrane separator 3, in membrane separator 3, gas separation membrane is housed; The hot side-entrance A that heat exchanger 1 has connects polyurethane fiber dry spinning system spinning shaft by pipeline and discharges gas outlet, the gas feed G that the hot side outlet B that heat exchanger 1 has has by pipeline junctional membrane separator 3, the gas discharge outlet I that membrane separator 3 has connects by pipeline the cold fluid import D that described heat exchanger 1 has, the cold fluid outlet C that heat exchanger 1 has is connected to the gas feed of polyurethane fiber dry spinning system spinning shaft by pipeline, and the liquid outlet J that membrane separator 3 bottoms have is connected to DMAC storage tank by pipeline.On membrane separator 3, being connected to vavuum pump 4 by pipeline, is 10-95kPa by vavuum pump 4 by the vacuum degree control in membrane separator 3.
Wherein in the connecting pipe between hot side outlet B and the gas feed G of membrane separator 3 of heat exchanger 1, be connected to cooler 2; Further cooling for do not reach required decline temperature after high-temperature gas mixture is by heat exchanger time.In connecting pipe between cold fluid outlet C and the gas feed of polyurethane fiber dry spinning system spinning shaft of heat exchanger 1, be connected to heater 5.Further heating when the saturating residual air of heated air diffusion barrier does not reach required ascending temperature after by heat exchanger.Wherein heat exchanger is heat pipe, heater or cooler.Wherein membrane separator, its tank shape is vertical tank, horizontal tank, spherical tank or tapered shaped can.Its intermediate pump is water ring vacuum pump, screw vacuum pump, reciprocating pump, Roots vaccum pump or gear pump.
When the present embodiment work, comprise the steps:
The thermal medium that contains finite concentration DMAC of (i) discharging from spinning shaft, temperature is about 180-230 ℃.This gas enters from the hot side-entrance A of heat exchange of heat pipe 1, and with working media (comprising air, nitrogen, the inert gas etc.) heat exchange in heat pipe, mixture temperature is approximately down to after uniform temperature (60-120 ℃), discharges from the hot side outlet B of heat exchange of heat pipe 1.Working media gasification zone in heat pipe is walked hot-air liberated heat.
The gaseous mixture of (ii) discharging from the hot side outlet B of heat exchange of heat pipe enters the import E of cooler 2, after cooler 2 is down to uniform temperature (40-60 ℃), discharges from the outlet F of cooler 2, enters membrane separator 3.
The gaseous mixture of (iii) discharging from the outlet F mouth of cooler 2 enters the gas feed G of membrane separator 3.Vacuumize at vavuum pump 4 under the state that guarantees film both sides constant pressure difference, gaseous mixture is after the gas separation membrane in membrane separator 3 separates, and the DMAC seeing through in gas is condensed into liquid state by gaseous state, discharges and enters DMAC surge tank from the liquid outlet J of membrane separator 3; Residual air is the dielectric gas that contains micro-DMAC thoroughly, discharges and enters heat exchange of heat pipe 1 from the gas discharge outlet I of membrane separator 3.
The saturating residual air of (iv) discharging from the gas discharge outlet I of membrane separator enters from the cold fluid import D of heat exchange of heat pipe 1, the condensation heat of gaseous working medium in heat pipe is used for conducting self-heating by mode by heat exchange, residual air temperature rises to (150-180 ℃) after uniform temperature and, from the cold fluid outlet C discharge of heat exchange of heat pipe 1, enters heater 5 thoroughly.
The gaseous mixture of (v) discharging from heat exchange of heat pipe 1 enters from the gas feed K of heater 5, and heater via is heated to after 230-265 ℃, discharges and enters spinning shaft from the gas vent L of heater 5, carries out the solvent seasoning in spinning solution as hot blast.
Wherein the Main Function of heat pipe is: the heat discharging when the gaseous mixture that spinning shaft is discharged is lowered the temperature, for the medium of the thoroughly remaining side of heating film, carries out effective utilization of heat.Film separation system, comprises membrane separator, vavuum pump and auxiliary facility.The Main Function of film separation system is: the DMAC component in the gaseous mixture after cooling carried out effectively separating and enrichment, and the DMAC that sees through side and be mainly high concentration of film, thoroughly remaining side is the medium that contains micro-DMAC.Membrane separator plays a major role to effective separation and the enrichment of DMAC, and in membrane separator, vacuum is about 10-95kPa.Membrane separator, its tank shape can be vertical tank, horizontal tank, spherical tank, tapered shaped can etc.The kind of film, is mainly gas separation membrane.The DMAC seeing through in gas becomes liquid state from gaseous state, refers under certain vacuum state, and the vapour pressure that sees through DMAC in gas of membrane separator is greater than the saturated vapor pressure through DMAC under temperature degree, therefore after the DMAC of gaseous state sees through film, direct saturated condensation.Vavuum pump, can be water ring vacuum pump, screw vacuum pump, reciprocating pump, Roots vaccum pump, gear pump etc.
In addition to the implementation, the utility model can also have other embodiments.All employings are equal to the technical scheme of replacement or equivalent transformation formation, all drop on the protection domain of the utility model requirement.
Claims (6)
1. a polyurethane fiber dry spinning medium circulation system, is characterized in that: comprise heat exchanger (1) and membrane separator (3), described membrane separator is equipped with gas separation membrane in (3), the hot side-entrance A that described heat exchanger (1) has connects polyurethane fiber dry spinning system spinning shaft by pipeline and discharges gas outlet, the hot side outlet B that described heat exchanger (1) has connects by pipeline the gas feed (G) that described membrane separator (3) has, the gas discharge outlet (I) that described membrane separator (3) has connects by pipeline the cold fluid import (D) that described heat exchanger (1) has, the cold fluid outlet (C) that described heat exchanger (1) has is connected to the gas feed of polyurethane fiber dry spinning system spinning shaft by pipeline, the liquid outlet (J) that described membrane separator (3) bottom has is connected to DMAC storage tank by pipeline.
2. polyurethane fiber dry spinning medium circulation system as claimed in claim 1, is characterized in that: described membrane separator (3) is upper is connected to vavuum pump (4) by pipeline, is 10-95kPa by described vavuum pump (4) by the vacuum degree control in membrane separator (3).
3. polyurethane fiber dry spinning medium circulation system as claimed in claim 2, is characterized in that: in the connecting pipe between the hot side outlet (B) of described heat exchanger (1) and the gas feed (G) of described membrane separator (3), be connected to cooler (2); In connecting pipe between cold fluid outlet (C) and the gas feed of polyurethane fiber dry spinning system spinning shaft of described heat exchanger (1), be connected to heater (5).
4. polyurethane fiber dry spinning medium circulation system as claimed in claim 3, is characterized in that: described heat exchanger is heat pipe, heater or cooler.
5. polyurethane fiber dry spinning medium circulation system as claimed in claim 3, is characterized in that: described membrane separator, its tank shape is vertical tank, horizontal tank, spherical tank or tapered shaped can.
6. polyurethane fiber dry spinning medium circulation system as claimed in claim 3, is characterized in that: described vavuum pump is water ring vacuum pump, screw vacuum pump, reciprocating pump, Roots vaccum pump or gear pump.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320856826.9U CN203639619U (en) | 2013-12-23 | 2013-12-23 | Spandex dry spinning medium circulation system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320856826.9U CN203639619U (en) | 2013-12-23 | 2013-12-23 | Spandex dry spinning medium circulation system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203639619U true CN203639619U (en) | 2014-06-11 |
Family
ID=50870879
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320856826.9U Expired - Lifetime CN203639619U (en) | 2013-12-23 | 2013-12-23 | Spandex dry spinning medium circulation system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203639619U (en) |
-
2013
- 2013-12-23 CN CN201320856826.9U patent/CN203639619U/en not_active Expired - Lifetime
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140611 |
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| CX01 | Expiry of patent term |