CN202237820U - Solvent replacement dissolution device for preparing organic membranes - Google Patents
Solvent replacement dissolution device for preparing organic membranes Download PDFInfo
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- CN202237820U CN202237820U CN2011203492870U CN201120349287U CN202237820U CN 202237820 U CN202237820 U CN 202237820U CN 2011203492870 U CN2011203492870 U CN 2011203492870U CN 201120349287 U CN201120349287 U CN 201120349287U CN 202237820 U CN202237820 U CN 202237820U
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Abstract
The utility model relates to a solvent replacement dissolution device for preparing organic membranes, which solves the problems of high solvent recovery cost, large residual solvent content in membranes, low solvent recovery rate and incapability of realizing continuous production of solvent replacement dissolution of an existing device. The technical scheme includes that the solvent replacement dissolution device comprises a plurality of coagulating tanks sequentially arranged from front to back, the first coagulating tank is provided with a discharge port, the final coagulating tank is provided with an injection port, and each two coagulating tanks are communicated by a pipeline or communicating holes on tank walls. The solvent replacement dissolution device is simple in structure, high in solvent recovery rate, low in recovery cost, free of sewage discharge and capable of realizing continuous operation of a system.
Description
Technical field
The utility model relates to a kind of device that is used for the water treatment filming technology, the solvent exchange dissolving device of organic film preparation specifically.
Background technology
Inversion of phases legal system film; Prepare the homogeneous polymer solution of definite composition exactly; Make solution carry out the mass transfer exchange of solvent and non-solvent around in the environment through the certain physical method, change the thermodynamic state of solution, its polymer solution from homogeneous phase is separated; Be transformed into the gel structure of a three-dimensional macromolecular network formula, final film-forming.Inversion of phases system embrane method can be divided into following several kinds according to the difference of the physical method that changes the solution thermodynamics state: solvent evaporation phase inversion, thermal induction phase inversion, gaseous phase deposition phase inversion and solution phase inversion.The solution phase inversion is also claimed the solution phase inversion or immerses gel phase to transform, because its technology is simple, has more process variability; Can better regulate the structure and the performance of film according to the purposes of film, become the main method of preparation micro-filtration and milipore filter, it usually with dimethylacetylamide (DMAc) as solvent; Its method for recovering solvents is mainly through adding water in coagulating tank; When film solidifies through coagulating tank, utilize the water-soluble characteristic of solvent, make solvent by stripping in the film; After solvent strength that the water in the coagulating tank contains reaches certain value, then solution is discharged extraction again or solvent is wherein reclaimed in distillation.Concrete technology is as shown in Figure 1; First coagulating tank A from film (tubulose or flat) the entering forefront (film upstream end) that hopper comes out; Get into next coagulating bath successively through pulley, through after 3～5 coagulating baths, the solvent in the film is replaced stripping by major part usually.Each coagulating tank is all established independent water inlet and dump valve, and after the solvent strength in 1～2 coagulating tank in front reached setting value, solution was discharged from coagulating tank bottom-discharge valve separately and got into solvent recovering system.After solvent strength reaches the respective settings value in the several coagulating tanks in back, also discharge and get into Waste Water Treatment from coagulating tank bottom-discharge valve separately.After the emptying of coagulating bath solution, add new water to the coagulating tank of correspondence respectively by the water inlet on the water inlet pipe fitting 1.
There is following problem in above-mentioned solvent exchange dissolving-out process: (1) solvent recovery cost is high: because each coagulating tank is not connected; And the travel direction of film in coagulating tank is from front to back; It is different causing the contained solvent strength of solution in the different coagulating tanks; The solvent strength that solution contains in the coagulating tank of first contact membranes of forefront is the highest, and then concentration is low more more backward.Concentration is low more, and then cost recovery is also high more, and solvent recovering rate is low more.Consider the problem of solvent recovery cost and efficient; The solvent of only 1～2 coagulating tank in front being discharged in the liquid usually reclaims; And the solution of the low solvent that other coagulating tank is discharged is as discharge of wastewater; Get into sewage disposal system, cause water resource waste on the one hand, the solvent in the water also can bring ambient influnence; On the other hand, need build sewage disposal system, increased investment and operating cost that film is produced, and the partial solvent loss also can cause the further increase of operating cost.(2) solvent residual amount is big in the film; Solvent recovering rate is low: along with continuing of producing carries out since in each coagulating tank in the solution contained solvent strength increase gradually, same coagulating tank internal solvent motive force of stripping from film reduces gradually; Solvent residual amount increases gradually in film; When needs are changed coagulating bath solution, reach maximum, cause solvent dissolution rate from film unstable, solvent residual amount is big in the film.(3) can not realize that the solvent exchange stripping produces continuously: because the solution concentration in the coagulating tank then must regularly be discharged (or reclaim or as discharge of wastewater) and fluid injection production again when reaching predetermined value; During changing solution; The film production facility must be stopped transport, and has influenced the continuity of producing.
The utility model content
The purpose of the utility model is in order to solve the problems of the technologies described above, provide a kind of simple in structure, solvent recovering rate is high, cost recovery is low, without sewage discharge, can the realization system solvent exchange dissolving device of organic film preparation of operation continuously.
The utility model device comprises tactic from front to back a plurality of coagulating tanks, and the most previous said coagulating tank is established outlet, and last coagulating tank is established inlet, and the opening between the adjacent coagulating tank on pipeline or cell wall is communicated with.
All be communicated with through pipeline between the said adjacent coagulating tank, the upper end of said pipeline is positioned at the epimere of an adjacent back coagulating tank, and the lower end of pipeline is positioned at the hypomere of adjacent previous coagulating tank.
Said pipeline is provided with water pump.
Height such as the upper end height of pipeline or successively decrease successively to preceding in said a plurality of coagulating tank by the back.
Opening between the said adjacent coagulating tank on cell wall is communicated with, a plurality of openings on cell wall up and down stagger arrangement arrange.
Opening between the said adjacent coagulating tank on cell wall is communicated with, and said opening all is positioned at the epimere of cell wall, also vertically is provided with dividing plate in the said coagulating tank, and said dividing plate lower end is passed through for film and solution apart from the groove bottom certain clearance.
Height such as the height of said opening on cell wall or successively decrease successively to preceding by the back.
Concrete technology is for comprising tactic from front to back a plurality of coagulating tanks (according to the film trend, before the film upstream end was, film left end and is the back); The solution that is used to solidify film is housed in the groove; In the time of need carrying out solvent exchange, earlier in last coagulating tank, inject fresh solution, by the back to before; Solvent-laden solution in the back coagulating tank is flowed in previous coagulating tank successively, and by discharging solvent-laden solution in the most previous coagulating tank.
The amount of the fresh solution that said amount by the solvent-laden solution of discharging in the most previous coagulating tank is equivalent in last coagulating tank, to inject.
Solvent-laden solution flows in previous coagulating tank through gravity flow or pipeline pressing mode successively in the said back coagulating tank.
Said fresh solution can make the solution of solvent stripping from film for water or other; Film gets into the interior order of a plurality of coagulating tanks for from front to back; Then the flow direction of fresh solution in a plurality of coagulating tanks be by the back to before, until from the most previous coagulating tank, discharging.The reversed in order that the order of fresh solution entering coagulating tank should get into coagulating tank with film; Because when film gets in the most previous coagulating basin; Amount in the film in the solvent pass into solution is maximum; Solvent strength is also the highest in the solution, with containing the highest solution discharge can the raising solvent recovering rate of solvent relatively, reducing cost recovery.Under the prerequisite of the coagulating tank constancy of volume; The fresh solution that benefit is gone into can tie up the space of original solution, through gravity flow or pipeline pressing mode, makes the solution in original coagulating tank flow into previous coagulating tank; By that analogy; Thereby make the solution in the solvent strength the most previous the highest coagulating tank " squeezed " discharge,, also make the corresponding reduction of solution concentration in the most previous coagulating tank simultaneously owing to mended from the solution in the back coagulating tank.If when producing, lasting benefit is gone into fresh solution, through monitoring and the reasonable computation to solvent strength; Can make same coagulating tank owing to constantly discharge original solution forward, and mend the solution in the back coagulating tank, also constantly stripping of the solvent in the film simultaneously; Can realize that solvent strength remains in the stable scope in the same coagulating tank; Can not occur that solvent strength increases gradually in the solution, solvent motive force of stripping from film reduces gradually, solvent dissolution rate problem of unstable.Certainly, the mode of replenishing fresh solution is not limited to the mode of above-mentioned continuous supplementation, also can realize replenishing as required or the timing regular replenishment through the monitoring to strength of fluid.The quantity of said coagulating tank is not particularly limited, and those skilled in the art can be according to concrete needs appropriate design.
When adopting opening to be communicated with each coagulating tank; In order to prolong the stroke of flow of solution as much as possible; Make and solidify in the grain tank original solution and get into a next coagulating tank (perhaps discharging) at first; Can be with opening setting and design liquid level respective heights corresponding, in groove, vertical dividing plate is set then along the pulley axis direction, the upper end of dividing plate should be higher than liquid level (preferably 20-50mm); Lower end and groove bottom leave the gap and supply solution and film to pass through, and this clearance height guarantees that preferably the dividing plate lower end is apart from pulley or cylinder outer rim 20-50mm; Perhaps make opening on a plurality of cell walls up and down stagger arrangement arrange (the opening height of top is with to design liquid level corresponding, the opening of below be positioned at or near the lower end of cell wall).When adopting pipeline to be communicated with adjacent two coagulating tanks, also should make the pipeline upper end height that is positioned at the cell wall epimere corresponding with the design liquid level of corresponding coagulating tank, lower end of duct is in the hypomere (best position near groove bottom) of cell wall.
The method that realizes solution one-way flow (opposite with the direct of travel of film, i.e. adverse current) in a plurality of coagulating tanks has multiple, like gravity flow or pressurized delivered.After in last coagulating tank, injecting fresh solution, liquid level will be higher than the liquid level of other coagulating tank that is communicated with it in this groove, thereby realizes that solution is by the gravity flow to low level tank of the groove of high liquid level; When the gravity flow effect is relatively poor; Also can make the liquid level in the back coagulating tank be higher than the liquid level in the previous coagulating tank, thereby produce hydraulic pressure difference through design by the method that back liquid level in preceding a plurality of coagulating tanks successively decreases successively; Strengthen flowing of liquid; As on the shared cell wall of adjacent two coagulating tanks, leaving opening, and the height and position of opening on cell wall successively decreased successively by the back to preceding, realize that aforesaid liquid level is poor; Or the pipeline upper end position height that will be communicated with two coagulating tanks is realized aforesaid liquid level poor (do not use water pump, have energy-saving advantages) by successively decreasing successively to preceding after being designed to.Perhaps set up water pump on the pipeline of a plurality of coagulating tanks respectively and carry being communicated with, realizes a plurality of solidify solution in the fluid bowl by the back to preceding mobile.
The solvent that said solvent refers to add in the film-forming process (be in the film contained solvent).
Beneficial effect:
1. by last coagulating tank water filling, the most previous coagulating tank draining, the solution solvent concentration of discharging is high; The solution of discharging can all carry out solvent recovery, does not have any waste water and discharges, and has avoided the waste of water resource; Need not Waste Water Treatment, avoided environmental pollution, reduced film preparation construction investment and operating cost greatly; Effectively improve solvent recovering yield.
2. can under situation about not stopping production, carry out water filling and draining, realize the displacement stripping of solvent, realize the continuity that film is produced.
3. through to the water inlet and the control of draining, make that solvent strength remains in the stable scope in the solution that solidifies in the liquid bath, film is replaced the stripping solvent under the solution of solvent stability concentration, and the motive force equilibrium of solvent exchange stripping helps the maintenance of film.
4. need not water filling port is set separately on each coagulating tank, structure is more simple, operates more easyly, and improvement cost is low.
Description of drawings
Fig. 1 is the sketch map of the solvent exchange dissolving device of existing organic film preparation.
Fig. 2 is the sketch map of solvent exchange dissolving device of organic film preparation of the utility model embodiment 1.
Fig. 3 is the sketch map of solvent exchange dissolving device of organic film preparation of the utility model embodiment 2.
Fig. 4 is the sketch map of solvent exchange dissolving device of the organic film preparation of solution phase inversion of the utility model embodiment 3.
Wherein, 1-water inlet pipe, 2-film, 3-pulley, 4-outlet, 5-water inlet, 6-dump valve, 7-hopper, 8-wrapping wire control cabinet, 9-inlet, 10-pipeline, 11-cell wall, 12-opening, 13-dividing plate.
The specific embodiment
Below in conjunction with accompanying drawing the utility model is further explained:
Embodiment 1:
Apparatus structure: referring to Fig. 2; Coagulating tank A, B, C, D, E order from front to back arrange, a shared cell wall 11 between two coagulating tanks, and the said bath E hypomere that coagulates is established inlet 9; Coagulating tank A epimere is established outlet 4; All be communicated with (can install on the pipeline 10 or uneasy holding water pump) through pipeline 10 between the said adjacent coagulating tank, the upper end of said pipeline 10 is positioned at the epimere of an adjacent back coagulating tank, and the lower end of pipeline is positioned at the hypomere of adjacent previous coagulating tank.To preceding successively decrease successively (perhaps waiting high), the dump valve 6 (system is in normally off when normally moving) that liquid is used in the emptying groove also is equipped with when being used for shutting down maintenance in each coagulating tank bottom to the upper end height of pipeline by the back in said a plurality of coagulating tank.Also be provided with a plurality of pulleys 3 (form according to film can also be cylinder) that are used to film 2 guiding on the coagulating tank according to the trend of film 2.
Technical process:
The film 2 that is come out by hopper 7 is drawn by wrapping wire control cabinet 8, by pulley 3 guiding, and turnover successively in coagulating tank A, B, C, D, E from front to back; Through the solvent that contains in the solution stripping film in the groove, solution (being water in the present embodiment) is housed, when film immerses in the water in the said coagulating tank; Solvent in the film is made and is contained solvent in the water by stripping in the film, and the solvent strength among the coagulating tank A that film 2 gets at first is the highest; The solvent strength in the water is successively decreased successively among all the other coagulating tank B, C, D, the E from front to back, after system moves a period of time, when recording the solvent strength arrival setting value among the coagulating tank A through checkout gear (being used for detecting the concentration of water solvent); Open inlet 9, mend fresh water, this fresh water gets among the coagulating tank E; Water level among the coagulating tank E is risen; When water level covered the upper end of pipeline 10, water was gone into the bottom that liquid level is lower than the coagulating tank D of coagulating tank E by pipeline 10 overflows, because inlet 9 is positioned at coagulating tank E hypomere (near the position of trench bottom); So the water that overflow is gone among the coagulating tank D is original solvent-laden water among the coagulating tank E at first; Coagulating tank D makes the also corresponding liter mutually of its liquid level because benefit has been gone into from the water among the coagulating tank E, because the lower end of pipeline 10 is positioned at the hypomere (near the position of trench bottom) of coagulating tank D, so the solution that overflow is gone among the coagulating tank C is original solvent-laden water among the coagulating tank D at first; By that analogy; Each coagulating tank is mended the relatively low water of solvent strength in the back coagulating tank successively, and original water in this groove is flowed in the previous coagulating tank, because the outlet 4 among the coagulating tank E can be normally open; The water that contains the high concentration solvent that overflow goes out among the final coagulating tank A is flowed out by outlet 4, gets into solvent recovering system.This water supplementing method has multiple; As to the continuous moisturizing of coagulating tank E; By coagulating tank A continuous drainage, the solution that coagulating tank A is discharged is the water that contains higher high solvent concentration, and solvent strength is stable within the specific limits; The solvent strength of solution also can remain in the metastable scope in each groove simultaneously, thereby makes the motive force of solvent stripping in the film also remain on stable state; Or those skilled in the art can adopt the mode of moisturizing at regular time and quantity to carry out moisturizing through calculating.How much that mends the water yield in the unit interval can regulate (this is a prior art, is not described further at this) from computer controlled automatic according to the survey prison realization to solvent strength among the coagulating tank A.Because the water that all overflows go out is sent into solvent recovering system by outlet 4, all carries out solvent recovery, therefore has no discharge of wastewater; Solvent recovering rate also is largely increased, and when carrying out the solvent exchange stripping, does not influence the ordinary production of film 2 fully; Need not to stop production and change liquid; Guarantee the continuity of producing, improved production efficiency, had vast market prospect.
Device: referring to Fig. 3, different with embodiment 1 is to have cancelled pipeline 10; Opening 12 between the adjacent coagulating tank on cell wall 11 is communicated with; Said opening 12 all is positioned at the epimere (the overflow liquid level that the height of opening 12 is set for this groove) of cell wall 11, vertically is provided with dividing plate 13 along pulley 3 axis directions in the middle of the said coagulating tank, and each coagulating bath is separated into two parts; Dividing plate 13 lower ends are apart from pulley 3 outer rims 20～50mm;, the upper end of said dividing plate 13 is higher than liquid level 20-50mm, and the lower end has the gap apart from groove bottom and passes through for film 2 and liquid.The height on cell wall 11 of the said opening 12 of epimere (preferably being not less than liquid level) that inlet 9 is positioned at coagulating tank E by the back to preceding successively decrease successively (perhaps being in isometry position).All the other are with embodiment 1.
Technical process:
After fresh water gets into coagulating tank E; The liquid level of coagulating tank E is risen, because the compartmentation of liquid in 13 pairs of grooves of dividing plate has changed the flow direction of the solution of injection at coagulating tank E; Solution is flowed downward by the passage that dividing plate 13 and the latter half of wallboard of this coagulating tank E surround; Pass through the gap of dividing plate 13 lower ends and groove bottom again, get into the passage that surrounds by dividing plate 13 and this coagulating tank first half wallboard and upwards flow, get into next coagulating tank D by opening 12 overflows (gravity flow) at last; By that analogy; Each coagulating tank is mended the relatively low water of solvent strength in the back coagulating tank successively, and original water overflow in this groove is gone in the previous coagulating tank, because the outlet 4 among the coagulating tank E can be normally open; The water that contains the high concentration solvent that overflow goes out among the final coagulating tank A is flowed out by outlet 4, gets into solvent recovering system.All the other are with embodiment 1.
Embodiment 3:
Device: referring to Fig. 4; Different with embodiment 2 is; Cancellation dividing plate 13, inlet 9 is positioned at the hypomere of coagulating tank E, and the position of opening 12 is that stagger arrangement is arranged up and down on a plurality of coagulating tank cell walls 11; The opening 12 of coagulating tank E and coagulating tank D is at the epimere (overflow height that it highly is provided with for coagulating tank E) of cell wall in the present embodiment; The opening 12 of coagulating tank D and coagulating tank C is arranged (present embodiment is merely for example, is not limited to this kind arrangement) at the hypomere (near the position of trench bottom) of cell wall with this type of row stagger arrangement.All the other are with embodiment 2.
Technical process:
After fresh water gets into coagulating tank E, the liquid level of coagulating tank E is risen, by the opening overflow of cell wall epimere to coagulating tank D; Because water filling port 9 is positioned at the hypomere of coagulating tank E, the solution of going into coagulating tank D by coagulating tank E epimere opening 12 overflows (gravity flow) at first is original solvent-laden water among the coagulating tank E, and; Because the opening 12 of coagulating tank D and coagulating tank C is positioned at the hypomere of cell wall 11; Because coagulating tank D liquid level rises and coagulating tank C produces liquid level difference, under the effect of hydraulic pressure, the water of coagulating tank D bottom gets into coagulating tank C; By that analogy; Each coagulating tank is mended the relatively low water of solvent strength in the back coagulating tank successively, and original water overflow in this groove is gone in the previous coagulating tank, because the outlet 4 among the coagulating tank E can be normally open; The water that contains the high concentration solvent that overflow goes out among the final coagulating tank A is flowed out by outlet 4, gets into solvent recovering system.All the other are with embodiment 2.
Claims (7)
1. the solvent exchange dissolving device of an organic film preparation; Comprise tactic from front to back a plurality of coagulating tanks; It is characterized in that; The most previous said coagulating tank is established outlet, and last coagulating tank is established inlet, and the opening between the adjacent coagulating tank on pipeline or cell wall is communicated with.
2. the solvent exchange dissolving device of organic film preparation as claimed in claim 1; It is characterized in that; All be communicated with between the said adjacent coagulating tank through pipeline; The upper end of said pipeline is positioned at the epimere of an adjacent back coagulating tank, and the lower end of pipeline is positioned at the hypomere of adjacent previous coagulating tank.
3. the solvent exchange dissolving device of organic film preparation as claimed in claim 2 is characterized in that, said pipeline is provided with water pump.
4. the solvent exchange dissolving device of organic film preparation as claimed in claim 2 is characterized in that, height such as the upper end height of pipeline or successively decreased successively to preceding by the back in said a plurality of coagulating tanks.
5. the solvent exchange dissolving device of organic film preparation as claimed in claim 1 is characterized in that, the opening between the said adjacent coagulating tank on cell wall is communicated with, a plurality of openings on cell wall up and down stagger arrangement arrange.
6. the solvent exchange dissolving device of organic film preparation as claimed in claim 1; It is characterized in that; Opening between the said adjacent coagulating tank on cell wall is communicated with, and said opening all is positioned at the epimere of cell wall, also vertically is provided with dividing plate in the said coagulating tank; Said dividing plate lower end is passed through for film and solution apart from the groove bottom certain clearance.
7. height such as the solvent exchange dissolving device of organic film preparation as claimed in claim 6 is characterized in that, the height of said opening on cell wall or successively decrease successively to preceding by the back.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203492870U CN202237820U (en) | 2011-09-16 | 2011-09-16 | Solvent replacement dissolution device for preparing organic membranes |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203492870U CN202237820U (en) | 2011-09-16 | 2011-09-16 | Solvent replacement dissolution device for preparing organic membranes |
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| Publication Number | Publication Date |
|---|---|
| CN202237820U true CN202237820U (en) | 2012-05-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2011203492870U Expired - Fee Related CN202237820U (en) | 2011-09-16 | 2011-09-16 | Solvent replacement dissolution device for preparing organic membranes |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111054221A (en) * | 2018-10-16 | 2020-04-24 | 中国石油化工股份有限公司 | Device and method for preparing hollow fiber membrane |
-
2011
- 2011-09-16 CN CN2011203492870U patent/CN202237820U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111054221A (en) * | 2018-10-16 | 2020-04-24 | 中国石油化工股份有限公司 | Device and method for preparing hollow fiber membrane |
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Effective date of registration: 20171101 Address after: 430083, Hubei Wuhan Qingshan District Factory No. 2 Gate joint stock company organs Co-patentee after: Wuhan Wutuo Technology Co., Ltd. Patentee after: Wuhan iron and Steel Company Limited Address before: 430080 Wuchang, Hubei Friendship Road, No. A, block, floor 999, 15 Co-patentee before: Wuhan Wutuo Technology Co., Ltd. Patentee before: Wuhan Iron & Steel (Group) Corp. |
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Granted publication date: 20120530 Termination date: 20180916 |
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| CF01 | Termination of patent right due to non-payment of annual fee |