CN102895880A - Winding type membrane distillation component and membrane distillation method - Google Patents
Winding type membrane distillation component and membrane distillation method Download PDFInfo
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- CN102895880A CN102895880A CN2011102169449A CN201110216944A CN102895880A CN 102895880 A CN102895880 A CN 102895880A CN 2011102169449 A CN2011102169449 A CN 2011102169449A CN 201110216944 A CN201110216944 A CN 201110216944A CN 102895880 A CN102895880 A CN 102895880A
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- 238000004821 distillation Methods 0.000 title claims abstract description 86
- 239000012528 membrane Substances 0.000 title claims abstract description 33
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- 239000012141 concentrate Substances 0.000 claims description 6
- 238000007789 sealing Methods 0.000 claims description 6
- 230000015572 biosynthetic process Effects 0.000 claims 2
- 238000010276 construction Methods 0.000 claims 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D63/00—Apparatus in general for separation processes using semi-permeable membranes
- B01D63/10—Spiral-wound membrane modules
- B01D63/103—Details relating to membrane envelopes
- B01D63/1031—Glue line or sealing patterns
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D61/00—Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
- B01D61/36—Pervaporation; Membrane distillation; Liquid permeation
- B01D61/364—Membrane distillation
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D61/00—Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
- B01D61/36—Pervaporation; Membrane distillation; Liquid permeation
- B01D61/366—Apparatus therefor
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2313/00—Details relating to membrane modules or apparatus
- B01D2313/08—Flow guidance means within the module or the apparatus
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- Engineering & Computer Science (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The invention relates to a winding type membrane distillation component and a membrane distillation method. The membrane component comprises a central element and a multilayer membrane structure spirally wound around the central element. The central element is provided with an internal channel. The multilayer membrane component comprises at least one feed conveying layer, at least one breathable liquid-impermeable layer and at least one steam layer, which is applied with a negative pressure. When the component is used to separate a feed solution into vapor and liquid, the structure of the component enables the feed solution to flow along the axial direction of the component in the feed conveying layer, or enables the steam to flow along the axial direction of the component in the steam layer.
Description
Technical field
Embodiments of the invention relate to film distillation assembly, are specifically related to the takeup type film distillation assembly that pressure drop is low and heat efficient is high.The invention still further relates to corresponding membrane distillation method.
Background technology
Process in distillation generally comprises liquid evaporation and steam condensing.Distillation is fit to separate two or more different liquid of vapour pressure, perhaps is used for liquid is separated from salting liquid whole or in part.Traditional still-process needs distilland is heated to the boiling temperature of one or more components in the distilland, then with the steam condensing that obtains, obtains the liquid distillate thing.The film distillation can be kept by film the vapour pressure gradient of film both sides, thereby realizes distillation under lower temperature.In the process of film distillation, generally the feedstock solution preheating of need distillation can be formed the temperature difference in the both sides of film, thereby produces vapour pressure deficit in the film both sides, impel the part evaporation in the feedstock solution and see through rete.In the distillation of contact film or Air Gap Membrane still-process, the steam condensation on the liquid surface of inner surface or steam one side through behind the rete forms required liquid distillate thing.
In recent years, the application of film steamed bun in fluid treatment was more and more, but mostly concentrated on plate membrane module and the hollow fiber film assembly for the research of film distillation assembly.Wherein, generally by by sept or packing ring film being overrided to form from level to level, its membrane stack density (being membrane area/assembly volume ratio) is relatively low, thereby the effective film area less of the per unit volume of assembly for plate membrane module.And hollow fiber film assembly is generally made by polypropylene, polyethylene, polyvinylidene fluoride material, is difficult to use in hollow fiber film assembly the polytetrafluoroethylmaterial material with higher membrane distillation properties.
The mode of employing helical coil is constructed film distillation assembly can solve the problems referred to above plate or that the hollow fiber type membrane module runs into.In being 20090000939 U.S. Patent application, publication number disclosed a kind of spiral wound distillation device, this spiral wound distillation device has comprised a spiral wound membrane structure that is integrated with the internal condensation device, and its internal condensation device is used for the heat of condensation is recycled in the permeable membrane evaporation salting liquid before.The labyrinth of described spiral wound distillation device may allow has in the steam channel liquid to exist, and causes the thermal efficiency to reduce.In addition, because steam all is to flow along helical path with the liquid that needs distillation in described device, the pressure drop that its long runner produces may be excessive, causes realizing the permeable membrane evaporation, and in this patent application also without any the description relevant with the pressure drop control of runner.
Therefore, be necessary further to improve the design of takeup type film distillation assembly.
Summary of the invention
One embodiment of the present of invention provide a kind of takeup type film distillation assembly.This film distillation assembly is wound in the multi-layer film structure on every side of described center part with comprising center part and spirality.Described center part is provided with the inner passage.Described multilayer film assembly comprises at least one charging transfer layer, and the rete of at least one gas-permeable, liquid-impermeable and at least one steam layer are applied with a negative pressure in the wherein said steam layer.When the structure of described assembly is arranged so that described assembly is used for that a feedstock solution is divided into steam and concentrated liquid, can allow described feedstock solution in described charging transfer layer along the axial flow of described assembly, or allow described steam in described steam layer along the axial flow of described assembly.
An alternative embodiment of the invention provides a kind of membrane distillation method.This membrane distillation method comprises: a takeup type film distillation assembly is provided, this assembly by the multi-layer film structure spirality be wound in a center part around form, wherein said multi-layer film structure comprises rete and at least one steam layer of at least one charging transfer layer, at least one gas-permeable, liquid-impermeable; Apply a negative pressure to described steam layer; And introduce a kind of feedstock solution in the described charging transfer layer, in the process that described feedstock solution flows in the charging transfer layer, so that the evaporation of the part in this feedstock solution and the rete that sees through described gas-permeable, liquid-impermeable enter described steam layer.In the steam in feedstock solution in the wherein said charging transfer layer and the described steam layer at least one is along the axial flow of described takeup type film distillation assembly.
An alternative embodiment of the invention provides a kind of takeup type film distillation assembly.This film distillation assembly is wound in the multi-layer film structure on every side of described center part with comprising center part and spirality.Described center part comprises first and second passages of keeping apart, be positioned at the entrance of first passage and be positioned at the outlet of second channel.Described multi-layer film structure comprises rete and at least one steam layer of at least one charging transfer layer, at least one gas-permeable, liquid-impermeable, is applied with negative pressure in the wherein said steam layer.The charging transfer layer of described multi-layer film structure can make the outermost end portion that outwards flows to described charging transfer layer from the feedstock solution of described first passage introducing along the hand of spiral, after this outermost end portion turns to, inwardly flows to described second channel along the hand of spiral again.
Description of drawings
Be described for embodiments of the invention in conjunction with the drawings, the present invention may be better understood, in the accompanying drawings:
Fig. 1 has shown an a kind of cross sectional representation of takeup type film distillation assembly in the one embodiment of the invention.
Fig. 2 has shown an intermediateness in the process of assembling takeup type film distillation assembly as shown in Figure 1.
Fig. 3 has shown a takeup type film distillation assembly that the intermediateness that shows from Fig. 2 assembles.
Fig. 4 has shown schematically how charging transfer layer and the steam layer of takeup type film shown in Figure 3 distillation assembly seal, and how feedstock solution and steam flow respectively in charging transfer layer and steam layer.
Fig. 5 has shown that takeup type film distillation assembly shown in Figure 3 is installed on the state in the shell.
Fig. 6 has shown a kind of schematic diagram of cross section of takeup type film distillation assembly in the another embodiment of the present invention.
Fig. 7 has shown schematically how charging transfer layer and the steam layer of a kind of takeup type film distillation assembly among another embodiment seal, and how feedstock solution and steam flow respectively in charging transfer layer and steam layer.
Fig. 8 has shown that takeup type film distillation assembly shown in Figure 7 is installed on the state in the shell.
Fig. 9 has shown schematically how charging transfer layer and the steam layer of a kind of takeup type film distillation assembly among another embodiment seal, and how feedstock solution and steam flow respectively in charging transfer layer and steam layer.
Figure 10 has shown that takeup type film distillation assembly shown in Figure 9 is installed on the state in the shell.
The specific embodiment
Below will be described in detail the specific embodiment of the present invention.For fear of too much unnecessary details, in following content, will known structure or function be described in detail.
The language of approximation used herein can be used for quantitative expression, shows in the situation that do not change basic function to allow quantity that certain change is arranged.Therefore, with " approximately " " about " etc. the numerical value revised of language be not limited to this accurate numerical value itself.At least in some cases, the approximation language may be relevant with the precision of measuring instrument.Given number range can merge or mutually exchange herein, unless there is other Languages to limit in the literary composition, these scopes should comprise contained subrange in the scope.
One aspect of the present invention provides a kind of takeup type film distillation assembly, and this takeup type film distillation assembly is wound in the multi-layer film structure on every side of described center part with comprising center part and spirality.Described center part is provided with the inner passage.Described multilayer film assembly comprises at least one charging transfer layer, the rete of at least one gas-permeable, liquid-impermeable and at least one steam layer.Be applied with a negative pressure in the described steam layer.When the structure of described assembly is arranged so that described assembly is used for that a feedstock solution is divided into steam and concentrated liquid, can allow described feedstock solution in described charging transfer layer along the axial flow of described assembly, or allow described steam in described steam layer along the axial flow of described assembly.In a preferred embodiment, feedstock solution inwardly flows to center part and flows out described assembly from this center part along helical path, steam in described steam layer along the described assembly of axial outflow of assembly.
Since multi-layer film structure is curl be arranged on center part around, center part is the equal of the central shaft of described takeup type film distillation assembly substantially, " axially " of assembly as herein described refers to the direction parallel with center part.Steam in feedstock solution in the charging transfer layer or the steam layer can be along the axial flow of assembly, also can flow along the helical path that charging transfer layer or steam layer define.
Described takeup type film distillation assembly is arranged to allow uncooled steam carry out the form of condensation after leaving assembly again, such as, described takeup type film distillation assembly does not comprise the condensation structure that is integrated in the assembly, so that steam can flow out described assembly with uncooled form.
Described takeup type film distillation assembly can suitably seal to realize operating under the temperature more than 100 ℃.
The membrane material of described gas-permeable, liquid-impermeable generally comprises polytetrafluoroethylene (PTFE), polyvinylidene fluoride, polypropylene, polythene material and other is suitable for use in the membrane material in film distillation field.
Described charging transfer layer can be the formed solution channel of membranous wall by the film of gas-permeable, liquid-impermeable, can comprise supporting membranous wall or the inhomogeneity charging structure for conveying of enhance fluid or spacer element etc. in it.The material that is suitable as the charging transfer layer comprises can allow the flexible sheet material of feedstock solution from wherein flowing through.The charging transfer layer can comprise promoting to form on the film that contacts with the charging transfer layer surface structure of turbulent flow, to prevent that solute in the solution is in the film excessive accumulation in surface.In one embodiment, described charging transfer layer comprises the porous plastics sheet.In another embodiment, described charging transfer layer comprises the porous metals sheet.In yet another embodiment, described charging transfer layer comprises composite porous.In yet another embodiment, described charging transfer layer is the plasticity fabric.In yet another embodiment, described charging transfer layer is the plasticity sieve.Described charging transfer layer can be made by identical material with described steam layer, also can be made from a variety of materials.
The steam channel that opposite side that described steam layer can be described film forms can comprise supporting the spacer element of membranous wall etc. in it.Being fit to material with the steam layer comprises and can allow the flexible sheet material of steam from wherein passing through.In one embodiment, described steam layer comprises the porous plastics sheet, and in another embodiment, described steam layer comprises the porous metals sheet.In yet another embodiment, described steam layer comprises composite porous.In yet another embodiment, described steam layer is the plasticity fabric.In yet another embodiment, described steam layer is the plasticity sieve.
Described takeup type film distillation assembly has increased the bulk density of film, reduced the risk that liquid/gas leaks, and it can utilize more efficient, the microporous teflon membran of the better average pore diameter of performance between 0.1 to 1.0 micron.The design of described takeup type film distillation assembly itself has also solved back pressure problems and the liquid/gas leakage problem in the steam layer.
Fig. 1 has shown a kind of takeup type film distillation assembly 100 among the embodiment, and it comprises a center part 102 and is arranged at spirally a described center part multi-layer film structure 104 on every side.
Fig. 2 has shown an intermediateness in the process of the described takeup type film distillation of assembling assembly 100.As shown in Figure 2, described center part 102 has an inner passage 106, and this inner passage has two openings 108 and 110, lay respectively at, such as, the axial two ends of center part 102.Its split shed 108 seals, and opening 110 unsealings are as the outlet of center part inner passage 106.Be used for being arranged at spirally center part 102 around comprise rete 113 and a steam layer 114 of a charging transfer layer 112, a folding gas-permeable, liquid-impermeable with the membrane stack assembly 111 that forms multi-layer film structure 104.
In a specific embodiment, described takeup type film distillation assembly 100 can be made by following steps: (a) charging transfer layer 112 is twined circle or a multi-turn from its an end edge (the inner terminal edge of hereinafter referred to as charging transfer layer 112) beginning at center part 102, all the other parts of not twining are extended to a side of center part 102; (b) the distillation rete 113 with gas-permeable, liquid-impermeable stacks on the center part 102, and folding along center part 102, and the part that the two halves after folding not twine described charging transfer layer 112 is clipped in the middle; (c) steam layer 114 is overlayed on the described center part 102 so that this steam layer 114 and described distillation rete 113 after folding wherein half with prolonging; (d) along arrow 180 direction center of rotation elements 102, so that the not winding of each layer partly is wrapped on the center part 102.By described method, described membrane stack assembly is wound on the described center part 102 spirally, so that charging transfer layer 112 contacts with center part 102, steam layer 114 does not contact with center part 102.Described center part 102 also comprises making between the inner passage 106 of center part 102 and the charging transfer layer 112 realizes the means that fluid is communicated with, such as through hole 120.
As shown in Figure 3, after described membrane stack assembly is wrapped on the described center part 102 fully, around center part 102, form a cylindric winding arrangement 130, thus the film that obtains assembling distillation assembly 100.Described cylindric winding arrangement 130 has two relative axial ends 132 and 134 and cylindrical outer surface 136.
Can suitably seal to form suitable feedstock solution runner and steam flow channel to charging transfer layer and the steam layer of described multi-layer film structure.Fig. 4 has shown schematically how feedstock solution layer 112 and steam layer 114 seal, and how solution and steam flow.As shown in Figure 4, described charging transfer layer all uses sealant 116 to seal at the edge at its axial two ends, preventing that the solution in the charging transfer layer from flowing out from this both sides, and its outermost end edge unsealing, as the entrance of feedstock solution being introduced the charging transfer layer.Described steam layer at its outermost end edge and one of them axial end edge seal with sealant 118, and its another axial end edge unsealing is as the outlet of steam.
As shown in Figure 5, described film distillation assembly 100 can be installed in the shell 150, such as, can make an axial end of center part 102 relative with an opening 152 of shell 150, the axial other end of center part 102 is fixed on another opening 154 places of shell 150, thereby described distillation assembly 100 is installed in the shell 150.
During use, can by such as vavuum pump, in the steam layer, apply a negative pressure.The feedstock solution of introducing from the entrance 156 of shell, such as the water that contains the solutes such as salt, sugar or protein, the unencapsulated outermost end edge 138 of the stoste transfer layer 112 from the outer surface 136 that is positioned at cylindric winding arrangement 130 enters into stoste transfer layer 112.Solution in stoste transfer layer 112 inwardly flows to the inner passage 106 of center part 102 along helical path, and flows out from exporting 110, and the form with concentrate flows out shell 150 from housing outlet 154 at last.Solution in described charging transfer layer 112 contacts the process of inner passage 106 that charging transfer layer 112 parts flow to center part at first from solution, and the part evaporation of solution also sees through rete and enters the steam layer.Steam in the steam layer distills the axial flow of assembly 100 to the end face 134 of cylindric winding arrangement 130 along film, and flows out from the unencapsulated axial end edge that is positioned at the steam layer on this end face 134.Between the inner surface of the outer surface 136 of described column structure 130 and described shell 150, a potted component 170 is arranged, be used for preventing the described steam that flows out from end face 134 with described from directly contacting between the feedstock solution of shell entrance 156 introducings or circulating.The setting of described potted component 170 can be guided to the described steam that flows out from end face 134 opening 152 of shell 150, makes it flow out shell from opening 152.
Under said circumstances, described film distills assembly so that steam flows out from the steam layer along the shortest path, thereby the pressure drop of steam has been reduced to minimum, has overcome the problem of steam back pressure, thereby can obtain a higher flow.
In illustrated embodiment, described takeup type film distillation assembly 100 comprises single charging transfer layer 112.In further embodiments, takeup type film distillation assembly also may comprise a plurality of charging transfer layer.Such as, in the embodiment shown in fig. 6, a kind of takeup type film distillation assembly 200 comprises two charging transfer layer 212 and 214.The use of a plurality of charging transfer passages can reduce the pressure drop of feedstock solution.
Shown in Fig. 7 and 8, in another embodiment, a kind of takeup type film distillation assembly 300 comprises that a center part 302 and one are arranged at the multi-layer film structure 304 around the described center part spirally.
Described center part 302 comprises an inner passage 306, and there are opening 308 and 310 in this inner passage, and this opening 308 and 310 can lay respectively at the axial two ends of center part 302.Wherein, opening 308 seals, and opening 310 unsealings, with for export.Be used for being arranged at spirally center part 302 around comprise rete and a steam layer of a charging transfer layer, a folding gas-permeable, liquid-impermeable with the membrane stack assembly 311 that forms multi-layer film structure 304.With sealant 316 sealing, and its edge, axial two ends unsealing enters and leaves respectively the entrance and exit of described charging transfer layer to described charging transfer layer as feedstock solution at its outermost end edge.Described steam layer at the edge at its axial two ends with and the outermost end edge all seal with sealant 318, flow out from these edges to prevent the steam in the steam layer, impel steam to flow to the inner passage 306 of center part 302 along helical path.
Can be by certain method, such as, with the similar a kind of method of the method for aforementioned assembling takeup type film distillation assembly 100, with described membrane stack assembly with spiral helicine form be arranged on center part 302 around, so that the steam layer contacts with center part, and the charging transfer layer does not contact with center part.The structure that described center part 302 comprises making the inner passage 306 of center part 302 to communicate with the steam layer is such as through hole 320 etc.After described membrane stack assembly is wrapped on the described center part 302 fully, around center part 302, form a cylindric winding arrangement 330, thus the film that obtains assembling distillation assembly 300.Described cylindric winding arrangement 330 has two relative axial ends 332 and 334.
As shown in Figure 8, described film distillation assembly 300 can be installed in the shell 350, such as, can make an axial end of center part 302 relative with an opening 352 of shell 350, the axial other end of center part 302 is fixed on another opening 354 places of shell 350, thereby described distillation assembly 300 is installed in the shell 350.
During use, can by such as vavuum pump, in the steam layer, apply a negative pressure.The feedstock solution of introducing from the entrance 356 of shell enters into the stoste transfer layer from one of them unencapsulated axial end edge of stoste transfer layer, and this unencapsulated axial end edge is positioned on the end face 334 of cylindric winding arrangement 330.Solution in the stoste transfer layer another end face 332 along the axial flow of described film distillation assembly 300 to cylindric winding arrangement 330 flows out from another the unencapsulated axial end edge that is positioned at the stoste transfer layer on this end face 332 with the form of concentrate.In the process that described solution flows in the charging transfer layer, the part in the solution is evaporated and is seen through rete and enters the steam layer.Steam in the steam layer inwardly flows to the inner passage 306 of center part 302 along helical path, and flows out from the outlet 310 of center part 302, flows out shell 350 from housing outlet 354 at last.Between the inner surface of the outer surface 336 of described column structure 330 and described shell 350, a potted component 370 is arranged, the position that it is presented axially near end face 334, be used for preventing the described concentrate that flows out from end face 332 with described from directly contacting between the feedstock solution of shell entrance 356 introducings or circulating.The setting of described potted component 370 can be guided to the described steam that flows out from end face 332 opening 352 of shell 350, makes it flow out shell from this opening 352, and can not arrive with the feedstock solution of potted component 370 opposite sides is mixed.
Under said circumstances, the path of the solution in the charging transfer layer of described film distillation assembly is shorter, can reduce the pressure drop of feedstock solution, improves the efficient of film distillation.
As shown in Figures 9 and 10, in another embodiment, a kind of takeup type film distillation assembly 500 comprises that a center part 502 and one are arranged at the multi-layer film structure 504 around the described center part spirally.
Described center part 502 comprises an inner passage 506, and there are entrance 508 and outlet 510 in this inner passage, and this entrance 508 and outlet 510 can lay respectively at the axial two ends of center part 502.The inner passage 506 of described center part is spaced a position 509 that is presented axially in described entrance 508 and exports between 510, so that this inner passage 506 has formed first passage 512 and the second channel 514 that is spaced, and the direct fluid that has intercepted between first passage 512 and the second channel 514 circulates.Wherein entrance 508 is at first passage 512 places, and outlet 510 is at second channel 514 places.This paper said " directly fluid circulation " refers to fluid without any part in the multi-layer film structure 504, such as the charging transfer layer, and directly circulates at two interregional fluids that carry out.For instance, in illustrated embodiment, under being incorporated into the situation of any part of feedstock solution in the charging transfer layer of not flowing through the first passage 512, entrance 508 can not directly flow to second channel 514.
Be used for being arranged at spirally center part 502 around comprise rete and a steam layer of a charging transfer layer, a folding gas-permeable, liquid-impermeable with the membrane stack assembly 511 that forms multi-layer film structure 504.Described charging transfer layer at its edge, axial two ends and the outermost end edge all use sealant 524 to seal, flow out from these edges to prevent the solution in the charging transfer layer.Described steam layer at its outermost end edge and one of them axial end edge seal with sealant 526, and its another axial end edge unsealing flows out the outlet of steam layer as steam.The charging transfer layer also further seals along a line with sealant 528, the sealing line begins near the position 509 that inner passage 506 is spaced from the inner terminal edge of charging transfer layer, such as, from the inner terminal edge of charging transfer layer contacts part with position corresponding with 509 on the center part 502, extend to the outermost end portion 529 of charging transfer layer to the outermost end edge of charging transfer layer, wherein this outermost end portion 529 is near the outermost end edge of charging transfer layer.The potted line that described sealant 528 forms has been divided into first 516 and second portion 518 with the remainder except outermost end portion 529 of described charging transfer layer.
Can be by certain method, such as, with the similar a kind of method of the method for aforementioned assembling takeup type film distillation assembly 100, with described membrane stack assembly with spiral helicine form be arranged on center part 502 around, so that the charging transfer layer contacts with center part 502, and the steam layer does not contact with center part 502.Described center part 502 comprises structure that first passage 512 is communicated with the first 516 of charging transfer layer, such as through hole 520, and is used for structure that second channel 514 is communicated with the second portion 518 of charging transfer layer, such as through hole 522.
Under said circumstances, the solution that enters into charging transfer layer first 516 from first passage 512 outwards flows to the outermost end portion 529 of charging transfer layer along helical path, turn to and flow into charging transfer layer second portion 518 at these outermost end portion 529 places, inwardly flow to second channel 514 along helical path charging transfer layer second portion 518 is interior, therefore, get with concentrate before form enters second channel 514 at it, the flow channel length of solution in the charging transfer layer almost is the twice of the length L of charging transfer layer.This paper said " length L of charging transfer layer " refers on the formed hand of spiral of charging transfer layer, begins to the length of the outermost end of charging transfer layer from the inner terminal of charging transfer layer.
After described membrane stack assembly is wrapped on the described center part 502 fully, around center part 502, form a cylindric winding arrangement 530, thus the film that obtains assembling distillation assembly 500.Described cylindric winding arrangement 530 has two relative axial ends 532 and 534.Described film distillation assembly 500 can be installed in the shell 550, such as, can respectively the axial two ends of center part 502 be fixed on entrance 552 and outlet 554 places of shell 550, thereby described distillation assembly 500 is installed in the shell 550.
During use, can by such as vavuum pump, in the steam layer, apply a negative pressure.The feedstock solution of introducing from the entrance 552 of shell flows into the first passage 512 of center parts 502 from entrance 508, then flow into the charging transfer layer.Solution in the charging transfer layer outwards flows to the outermost end portion 529 of charging transfer layer along helical path, after turning to, this outermost end portion 529 inwardly flows to second channel 514 along helical path, then the form with concentrate flows out second channel 514 from exporting 510, flows out shell from housing outlet 554 at last.Solution in described charging transfer layer contacts at first charging transfer layer part from solution and flows to the process of second channel 514, and the part of solution is evaporated and seen through rete and enters the steam layer.Steam in the steam layer distills the axial flow of assembly 500 to the end face 532 of cylindric winding arrangement 530 along film, and flows out from the unencapsulated axial end of the steam layer edge that is positioned on this end face 532, flows out shells 550 from shell aperture 556 at last.
Can realize by potted component the sealing at 509 places in the position, described inner passage 504, described potted component comprises the potted component that is removably installed in the center part or the potted component integrally formed with described center part.
In the present embodiment, because the feedstock solution respectively entrance from the center part 502 508 and outlet 510 flows into and flows out film distillation assembly 500, when film distillation assembly 500 is installed in the shell, do not need to add extra potted component, assembly 500 itself can guarantee good gas-liquid sealing.In addition, because the pressure drop of steam is low in the steam layer, described assembly 500 also can be realized higher distillation flow.
Film distillation assembly described in aforementioned a plurality of embodiment can allow steam flow out the steam layer along the shortest path, thereby reduces the pressure drop of steam, or allows solution flow out the charging transfer layer along the shortest path, reduces the pressure drop of solution.In addition, because condensation occurs under the saturation temperature, this saturation temperature is the function of condenser internal pressure, when the steam that produces when film distillation assembly enters and carries out condensation in the condenser, the reduction of pressure can cause condensation to need to occur under lower temperature, therefore pressure drop reduce also can reduce temperature drop, thereby improve the thermal efficiency of the film Distallation systm that uses described film distillation assembly.
Those skilled in the art can understand the present invention and also have very large advantage on the manufacturing cost of film distillation assembly and degree easy and simple to handle after reading this paper.
Although describe the present invention in conjunction with the specific embodiments, those skilled in the art will appreciate that and to make many modifications and modification to the present invention.Therefore, recognize, the intention of claims is to cover all such modifications and the modification in true spirit of the present invention and the scope.
Claims (19)
1. a takeup type film distills assembly, and it comprises:
Center part is provided with the inner passage; And
Multi-layer film structure, be wound in to spirality described center part around, described multilayer film assembly comprises at least one charging transfer layer, the rete of at least one gas-permeable, liquid-impermeable and at least one steam layer are applied with a negative pressure in the wherein said steam layer,
Wherein, when the structure of described assembly is arranged so that described assembly is used for that a feedstock solution is divided into steam and concentrated liquid, can allow described feedstock solution in described charging transfer layer along the axial flow of described assembly, or allow described steam in described steam layer along the axial flow of described assembly.
2. assembly as claimed in claim 1, the structure of wherein said assembly is arranged so that feedstock solution can flow to along the hand of spiral inner passage of described center part, and steam can be in described steam layer along the axial flow of described assembly.
3. assembly as claimed in claim 1, the edge at the axial two ends of wherein said charging transfer layer seals, and the edge unsealing of the outermost end of described charging transfer layer, enter the opening of described charging transfer layer as feedstock solution, the edge of the outermost end of described steam layer and the edge of one of them axial end seal, and the edge unsealing of another axial end, as vapor outlet port.
4. module as claimed in claim 1, the structure of wherein said assembly be arranged so that feedstock solution can be in described charging transfer layer along the axial flow of described assembly, and steam can flow to along the hand of spiral inner passage of described center part.
5. assembly as claimed in claim 1, the edge of the outermost end of wherein said charging transfer layer is sealing, and the edge unsealing at the axial two ends of described charging transfer layer, be used separately as the opening that feedstock solution entered and left described charging transfer layer, the edge at the axial two ends of described steam layer and the edge of outermost end all seal.
6. assembly as claimed in claim 1, wherein said center part comprise first and second passages of keeping apart, be positioned at the entrance at first passage place and be positioned at the outlet at second channel place; Wherein said multi-layer film structure is so that be incorporated into the outermost end portion that feedstock solution the described charging transfer layer can outwards flow to along the hand of spiral described charging transfer layer from described first passage, after this outermost end portion turns to, inwardly flow to described second channel along the hand of spiral again, and steam can be in described steam layer along the axial flow of described assembly.
7. assembly as claimed in claim 6, wherein said the first and second passages of keeping apart are by the position between the axial two ends at center part the inner passage of described center part to be intercepted formation.
8. assembly as claimed in claim 6, the edge at the axial two ends of wherein said charging transfer layer and the edge of outermost end seal, and described charging transfer layer further seals along a line, this line, extends to the outermost end portion of described charging transfer layer near the isolated position of described the first and second passages from the edge of the inner terminal of described charging transfer layer.
9. assembly as claimed in claim 6, the outermost end edge of wherein said steam layer and the edge of one of them axial end seals, and the edge unsealing of another axial end is used as vapor outlet port.
10. assembly as claimed in claim 1, wherein said assembly do not comprise the condensation structure that is integrated in this assembly, so that steam can flow out described assembly with uncooled form.
11. assembly as claimed in claim 1, the hermetically-sealed construction of wherein said assembly can use being higher than under 100 ℃ the temperature operation it.
12. a membrane distillation method, the method comprises:
A takeup type film distillation assembly is provided, this assembly by the multi-layer film structure spirality be wound in a center part around form, wherein said multi-layer film structure comprises rete and at least one steam layer of at least one charging transfer layer, at least one gas-permeable, liquid-impermeable;
Apply a negative pressure to described steam layer;
Introduce a kind of feedstock solution in the described charging transfer layer, in the process that described feedstock solution flows in the charging transfer layer, so that the evaporation of the part in this feedstock solution and the rete that sees through described gas-permeable, liquid-impermeable enter described steam layer,
In the steam in feedstock solution in the wherein said charging transfer layer and the described steam layer at least one is along the axial flow of described takeup type film distillation assembly.
13. method as claimed in claim 12 further is included in the described steam of external condensation that described takeup type film distills assembly.
14. a takeup type film distillation assembly, it comprises:
Center part, it comprises first and second passages of keeping apart, the outlet that is positioned at the entrance of first passage and is positioned at second channel; And
Multi-layer film structure, be wound in to its spirality described center part around, this multi-layer film structure comprises rete and at least one steam layer of at least one charging transfer layer, at least one gas-permeable, liquid-impermeable, is applied with negative pressure in the wherein said steam layer,
The charging transfer layer of wherein said multi-layer film structure can make the outermost end portion that outwards flows to described charging transfer layer from the feedstock solution of described first passage introducing along the hand of spiral, after this outermost end portion turns to, inwardly flow to described second channel along the hand of spiral again.
15. assembly as claimed in claim 14, wherein said the first and second passages of keeping apart are by the position between the axial two ends at center part an inner passage of described center part to be intercepted formation.
16. assembly as claimed in claim 14, the edge at the axial two ends of wherein said charging transfer layer and the edge of outermost end seal, and described charging transfer layer further seals along a line, the sealing line, extends to the outermost end portion of described charging transfer layer near the isolated position of described the first and second passages from the edge of the inner terminal of described charging transfer layer.
17. assembly as claimed in claim 16, wherein said charging transfer layer be separated into first and second portion by described potted line except other parts of its outermost end portion, described center part comprises can be made described first passage and described charging transfer layer first carry out the structure of fluid circulation and can make described second channel and state charging transfer layer second portion and carry out the structure that fluid circulates.
18. assembly as claimed in claim 14, wherein the structure setting of this assembly can so that feedstock solution before entering described second channel with the concentrate form, its flow channel length in described charging transfer layer is 1.5 times of charging transfer layer length at least.
19. assembly as claimed in claim 14, the outermost end edge of wherein said steam layer and one of them axial end edge seal, and another axial end edge unsealing, as vapor outlet port.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011102169449A CN102895880A (en) | 2011-07-29 | 2011-07-29 | Winding type membrane distillation component and membrane distillation method |
| PCT/US2012/047552 WO2013022591A1 (en) | 2011-07-29 | 2012-07-20 | Spiral wound membrane distillation module and membrane distillation method |
| TW101127326A TW201325691A (en) | 2011-07-29 | 2012-07-27 | Spiral wound membrane distillation module and membrane distillation method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011102169449A CN102895880A (en) | 2011-07-29 | 2011-07-29 | Winding type membrane distillation component and membrane distillation method |
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| Publication Number | Publication Date |
|---|---|
| CN102895880A true CN102895880A (en) | 2013-01-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011102169449A Pending CN102895880A (en) | 2011-07-29 | 2011-07-29 | Winding type membrane distillation component and membrane distillation method |
Country Status (3)
| Country | Link |
|---|---|
| CN (1) | CN102895880A (en) |
| TW (1) | TW201325691A (en) |
| WO (1) | WO2013022591A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107921375A (en) * | 2015-07-01 | 2018-04-17 | 斯皮拉尔泰克有限责任公司 | Wound form film module and method for by convection pattern diffusion dialysis |
| CN112638486A (en) * | 2018-06-08 | 2021-04-09 | 伊弗科恩有限责任公司 | Membrane distillation apparatus for producing water |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9718709B2 (en) * | 2013-03-13 | 2017-08-01 | Massachusetts Institute Of Technology | Multi-stage membrane distillation process |
| CN106943877B (en) * | 2017-04-18 | 2020-05-19 | 江苏大学 | Device for optimizing membrane distillation process by using swirl flow |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1054379A (en) * | 1990-01-29 | 1991-09-11 | 唐化学原料公司 | The membrane separation device that band spiral reinforced and the mobile control of infiltration/purge fluid twines, |
| WO1993010889A1 (en) * | 1991-11-25 | 1993-06-10 | The Dow Chemical Company | Spirally wound membrane device having three channels |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3878054A (en) * | 1964-12-09 | 1975-04-15 | Pactide Corp | Distillation apparatus and process |
| US4545862A (en) * | 1981-03-17 | 1985-10-08 | W. L. Gore & Associates, Inc. | Desalination device and process |
| DE102005053874A1 (en) | 2005-11-11 | 2007-05-16 | Wolfgang Heinzl | Method and device for adjusting the absolute pressure of a liquid to be concentrated in membrane distillation process |
-
2011
- 2011-07-29 CN CN2011102169449A patent/CN102895880A/en active Pending
-
2012
- 2012-07-20 WO PCT/US2012/047552 patent/WO2013022591A1/en active Application Filing
- 2012-07-27 TW TW101127326A patent/TW201325691A/en unknown
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1054379A (en) * | 1990-01-29 | 1991-09-11 | 唐化学原料公司 | The membrane separation device that band spiral reinforced and the mobile control of infiltration/purge fluid twines, |
| WO1993010889A1 (en) * | 1991-11-25 | 1993-06-10 | The Dow Chemical Company | Spirally wound membrane device having three channels |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107921375A (en) * | 2015-07-01 | 2018-04-17 | 斯皮拉尔泰克有限责任公司 | Wound form film module and method for by convection pattern diffusion dialysis |
| CN107921375B (en) * | 2015-07-01 | 2021-04-27 | 斯皮拉尔泰克有限责任公司 | Wound membrane module and method for diffusion dialysis by means of countercurrent mode |
| CN112638486A (en) * | 2018-06-08 | 2021-04-09 | 伊弗科恩有限责任公司 | Membrane distillation apparatus for producing water |
Also Published As
| Publication number | Publication date |
|---|---|
| TW201325691A (en) | 2013-07-01 |
| WO2013022591A1 (en) | 2013-02-14 |
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