CN102125806A - Method for applying spiral membrane assembly to vacuum membrane distillation - Google Patents
Method for applying spiral membrane assembly to vacuum membrane distillation Download PDFInfo
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- CN102125806A CN102125806A CN2010100343855A CN201010034385A CN102125806A CN 102125806 A CN102125806 A CN 102125806A CN 2010100343855 A CN2010100343855 A CN 2010100343855A CN 201010034385 A CN201010034385 A CN 201010034385A CN 102125806 A CN102125806 A CN 102125806A
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Abstract
The invention provides a method for applying a spiral membrane assembly to vacuum membrane distillation, which comprises the following steps of: arranging a hydrophobic flat membrane and certain auxiliary materials according to the steam flowing direction in a three-layer structural form of a thick net, a membrane and a fine net, and winding the hydrophobic flat membrane and the certain auxiliary materials on a central pipe drilled with pores together to manufacture the spiral membrane assembly, wherein a regularly arranged strip pore structure is adopted in a direct contact area of the fine net and the membrane; sealing and sticking each part according to the requirements of a vacuum operation process at the same time of winding; and manufacturing a membrane shell according to the structural characteristics of the assembly, and putting the assembly into the membrane shell and performing encapsulation to obtain a device capable of being effectively applied to the vacuum membrane distillation. Therefore, the hydrophobic flat membrane can be applied to the vacuum membrane distillation in a more reasonable mode.
Description
One, technical field
The invention belongs to the technical field that spiral wound membrane module is used, particularly spiral wound membrane module is applied to the technical method of vacuum membrane distillation.
Two, background technology
Vacuum membrane distillation (VMD) is on the basis of film distillation, makes environment under low pressure in the vapour transmission side, thereby realizes steam pressure difference in the hydrophobic membrane both sides, drives the mode of operation that the vapour transmission film is also directly extracted steam out the assembly condensed exterior.Current, vacuum membrane distillation is bigger with its flux, and the advantage that the thermal efficiency is higher obtains numerous researchers' favor gradually.
Owing to will keep environment under low pressure in the vapour transmission side, so vacuum membrane distillation is higher than the conventional film distillation to the requirement of assembly sealing, common membrane module mainly contains tubular type, doughnut formula and flat, wherein tubular membrane component is mainly used in ultrafiltration and counter-infiltration, application study is less in vacuum membrane distillation, and doughnut formula and flat research in vacuum membrane distillation are more extensive.
Current of greatest concern no more than doughnut formula membrane module, in recent years, theory and application study about hollow-fibre membrane all have a large amount of documents to deliver, the pleurodiaphragmatic in terspace material that research is adopted mostly is Kynoar (PVDF), and the advantage of hollow-fibre membrane is need not supporter, and the assembly preparation is simple relatively, and loading density is big, but its inferior position is some important hydrophobic materials and is unsuitable for spinning, as polytetrafluoroethylene (PTFE), limited the development of film distillation technology to a certain extent.
The application study of plate type membrane assembly in membrane bioreactor (MBR) is very ripe, application in film distillation and even vacuum membrane distillation also has some researchers to attempt, but it is all not too successful, the one, the membrane area loss is bigger in the making of assembly, it is big that the assembly of elementary membrane area takes up an area of the space, the 2nd, also more complicated on the component assembling than hollow fiber film assembly, and the mode of operation of vacuum membrane distillation has increased difficulty for the making of assembly and assembling especially.
By analyzing, can see that the distillation of doughnut formula membrane module and plate type membrane assembly against vacuum film is not optimal assembly, desirable vacuum membrane distillation assembly should comprise the characteristics of two aspects at least: the one, be suitable for most organic hydrophobic membrane materials, thereby can therefrom be chosen in the better membrane materials of aspect combination property such as flux and intensity, the form of film should be flat film; The 2nd, the making of assembly should be relative simple with assembling.Consider this 2 requirements, develop a kind of novel vacuum membrane distillation assembly, this is a starting point of the present invention.
The main reference document:
(1) Wu Yonglie.Film distillation technology and application progress thereof.Membrane science and technology, 2003,23 (4): 67.
(2) Gao Zhen, Xu Shichang, Ma Youguang etc.Vacuum membrane distillation technology application study present situation and progress.Sea lake salt and chemical industry, 2003,32 (6): 21～24.
(3) Hao Gaofeng, Ding Zhongwei, Liu Liying etc.The hollow fiber film assembly structure is to its film distillation Effect on Performance.Beijing University of Chemical Technology's journal (natural science edition), 2009,36 (5): 9～12.
Three, summary of the invention
The present invention proposes spiral wound membrane module is applied to vacuum membrane distillation, and the raw material that assembly adopts comprise: organic thin flat membrane, coarse net, nonwoven, fine-structure mesh, UVPC center mozzle, binding agent, putamina and corresponding UVPC pipe fitting.Now contrasting accompanying drawing is described in detail as follows.
Description of drawings: accompanying drawing 1 is the inside three-layered node composition of spiral wound membrane module; The appearance assumption diagram of accompanying drawing 2 spiral wound membrane module; Accompanying drawing 3 is that spiral wound membrane module is placed the section shape figure that installs behind the putamina.Wherein, the arrow in accompanying drawing 1 and the accompanying drawing 3 is represented the flow direction of fluid, and the heavy line arrow is represented the flow direction of feeding liquid, and the fine line arrow is represented the flow direction of steam.
What accompanying drawing 1 presented is the inside three-decker schematic diagram of spiral wound membrane module among the present invention, among the figure, the 1st, coarse net, the 2nd, bolting silk, the 3rd, diaphragm, the 4th, what fine-structure mesh, arrow represented is the traffic direction of steam, presses the traffic direction of steam, be divided into from top to bottom and be three-decker, wherein coarse net and bolting silk form the ground floor structure jointly, as the graticule mesh that feed liquid flows, are called the feed liquid side, the aperture of coarse net and thickness are all bigger, the diamond structure of its wire side can be strengthened the perturbation action to feed liquid, and bolting silk is lining between coarse net and the diaphragm, as protective layer; Diaphragm is the core material in the total as second layer structure, also is the interface of feed liquid side and inlet side; Fine-structure mesh is three-decker, is called inlet side, and on the one hand as the screw type runner of steam to the central tube operation, runner inside is high vacuum environment, on the other hand also as the outer lapping of membrane module.
Accompanying drawing 2 presents is that the surface structure of spiral wound membrane module and three-decker are in the concrete organizational form of assembly inside, among the figure, the 1st, the center mozzle, the 2nd, diaphragm, the 3rd, coarse net, the 4th, fine-structure mesh, the 5th, the strip hole has adopted regularly arranged strip pore structure on the fine-structure mesh surface with the zone that diaphragm directly contacts, and concrete spread pattern is seen spool surface, outermost hole will keep certain distance apart from the fine-structure mesh edge, as the bonding space of binding agent, the longitudinal length of hole is slightly shorter than the longitudinal length of diaphragm, and the width of hole is 3mm, article two, interpore distance is 5mm, and the existence of strip hole can be widened the flow channel space of inlet side. The method for coiling of assembly is, with double team coarse net in the middle of the diaphragm doubling, places then on the fine-structure mesh, is wound up into together on the central tube that has openning hole. It should be noted that, diaphragm longitudinally both sides of the edge and fine-structure mesh will be sealing adhesive, and forming fine-structure mesh runner and extraneous isolated environment, thereby can guarantee the sealing under the vacuum condition, simultaneously prevent that also feeding liquid from entering the fine-structure mesh runner from the side, pollute crossing film steam. Volume is to last, the transverse edge of upper strata diaphragm will with spool on the fine-structure mesh bonding, the transverse edge of two-layer diaphragm also will bond mutually up and down, thoroughly realizes the fully isolated of the helical flow path of fine-structure mesh side steam and coarse net side material liquid flowing channel with this.
Accompanying drawing 3 is for fitting into membrane module in the device section shape figure behind the putamina, among the figure, and the 1st, liquor inlet, the 2nd, material liquid outlet, the 3rd, steam (vapor) outlet, the 4th, center mozzle, be equipped with micropore on the central tube, communicate with the fine-structure mesh runner, form vacuum environment jointly so that central tube is inner.Thick-line arrow is represented the flow direction of feed liquid, and the thin-line arrow of passing the central tube micropore was represented the flow direction of film steam.In component internal, coarse net is around the multilayer runner of center mozzle formation ring-type, and fine-structure mesh forms the runner of screw type around the center mozzle.Working method and principle are as follows: the material liquid of uniform temperature enters putamina by the liquor inlet 1 of assembly lower end, enter the runner that forms by thick graticule mesh then, the volatile component evaporation at coarse net and contact interface place, film surface, under the effect of film both sides steam pressure difference, vapour transmission hydrophobic membrane micropore enters the fine-structure mesh side, under the effect of negative pressure, steam passes micropore by the screw type runner of fine-structure mesh and enters central tube 4, be drawn out of outside the assembly by steam (vapor) outlet 3 again, and material liquid is discharged by material liquid outlet 2 through coarse net runner access to plant upper end.
Spiral wound membrane module among the present invention is applied to vacuum environment, diaphragm can closely contact with fine-structure mesh under suction function, thus higher to the requirement of strength of membrane material, or between diaphragm and fine-structure mesh, add one deck lining again, alleviate the damage of fine-structure mesh, prolong the service life of diaphragm and even whole membrane module face; Vacuumizing is higher for the seal request of assembly in addition.
Four, embodiment
Lack but the abundant area of underground heat bitter can adopt the method for spiral wound membrane module vacuum membrane distillation to prepare drinking water at fresh water.
Primary condition and hypothesis:
(1) the deep phreatic water temperature is 85 ℃, and electrical conductivity is 6000 μ s/cm, and the phreatic water temperature is 25 ℃, and electrical conductivity is 450 μ s/cm.
(2) parameter of spiral wound membrane module: assembly external diameter 100mm, assembly effective length 400mm, inner diameter of centerpipe 20mm, effective film area 1.2m
2, 70 ℃ of the highest tolerable temperatures.
(3) under the abundant and continuous situation about moving of pre-treatment, the cleaning frequency of membrane module is 3 months.
(4) feeding liquid will carry out preliminary treatment to a certain degree.
Operational mode:
According to the tolerable temperature of assembly, the assignment component operating temperature is 65 ℃, other operating condition: vacuum is-0.095MPa feed rate 6m
3/ h.
Hot feed liquid and cold burden liquid mix adjusting earlier, and temperature is transferred to 65 ℃, and this moment, electrical conductivity was 4000 μ s/cm; Carry out sand setting then, flocculation sediment, and filter preliminary treatment, and remove the impurity in the feed liquid, prolong assembly service life and cleaning frequency.
The installation of assembly and operation: characteristics of element shapes in 3 with reference to the accompanying drawings, liquor inlet 1 links to each other with the outlet of thermostatic equipment, material liquid outlet 2 links to each other with the import of thermostatic equipment, form circulating of feed liquid, simultaneously, have successional moisturizing facility to connect thermostatic equipment, steam (vapor) outlet 3 links to each other with cooling device, cooling device connects vacuum equipment again, regulates vacuum by control valve and both can utilize this assembly to carry out the operation of vacuum membrane distillation.
Because in running, the circulation feed liquid can constantly reduce, and temperature also has small size decline, thus adopt successional moisturizing facility to connect thermostatic equipment, constant respectively with the flow and the temperature of assurance feeding liquid at 6m
3/ h and 65 ℃.Along with the operation of device, feeding liquid constantly is concentrated, and the flux of assembly also can significantly descend, when flux drops to 50% of initial flux, with the concentrated solution in the fresh solution replacing thermostatic equipment.Utilize continuous collecting device to collect cooled product water, the product water conductivity that obtains can reach in the 2 μ s/cm.
Claims (3)
1. method that spiral wound membrane module is applied to vacuum membrane distillation, it is characterized in that: will dredge flat membrane and auxiliary material with coarse net, the three-decker form of diaphragm and fine-structure mesh is arranged, be wound on together on the central tube that is with holes and make spiral wound membrane module, and be applied to vacuum membrane distillation.
2. method that spiral wound membrane module is applied to vacuum membrane distillation, it is characterized in that: spiral wound membrane module is inserted in the putamina, feeding liquid is flowed into by device lower end liquor inlet, outlet by side, device upper end is flowed out, steam enters the center mozzle via the helical flow path of fine-structure mesh, finishes the vacuum membrane distillation operation of spiral wound membrane module.
3. as the said a kind of spiral wound membrane module that is applied to vacuum membrane distillation of claim 1, it is characterized in that: regularly arranged strip pore structure has been adopted with the zone that diaphragm directly contacts in the fine-structure mesh surface.
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| CN2010100343855A CN102125806A (en) | 2010-01-20 | 2010-01-20 | Method for applying spiral membrane assembly to vacuum membrane distillation |
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| CN2010100343855A CN102125806A (en) | 2010-01-20 | 2010-01-20 | Method for applying spiral membrane assembly to vacuum membrane distillation |
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| CN102125806A true CN102125806A (en) | 2011-07-20 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102764592A (en) * | 2012-08-09 | 2012-11-07 | 正仁环保科技股份有限公司 | Poly tetra fluoro ethylene (PTFE) cylinder type plate membrane distiller |
| CN102989322A (en) * | 2011-09-16 | 2013-03-27 | 中国科学院生态环境研究中心 | Flat plate type membrane assembly for microwave vacuum membrane distillation operation |
| CN103058308A (en) * | 2013-01-14 | 2013-04-24 | 山东中宇环保科技有限公司 | Multi-page rolled type film contactor for removing resolvable gases in water |
| CN103357271A (en) * | 2013-08-07 | 2013-10-23 | 清华大学 | Method and device for membrane distillation pressured at the hot side |
| CN106365228A (en) * | 2015-07-24 | 2017-02-01 | 北京中环膜材料科技有限公司 | Double-latent membrane distillation assembly |
| WO2017133641A1 (en) * | 2016-02-02 | 2017-08-10 | 艾欧史密斯（南京）水处理产品有限公司 | Membrane element |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1490259A (en) * | 2002-10-15 | 2004-04-21 | 中国科学院生态环境研究中心 | Sewage treating method and apparatus by dynamic biologic membrane and activating mud |
| CN101374591A (en) * | 2005-06-24 | 2009-02-25 | 南洋理工大学 | Contaminated inflow treatment with membrane distillation bioreactor |
| CN201244449Y (en) * | 2008-07-10 | 2009-05-27 | 艾欧史密斯（上海）水处理产品有限公司 | Spiral coil type film element |
-
2010
- 2010-01-20 CN CN2010100343855A patent/CN102125806A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1490259A (en) * | 2002-10-15 | 2004-04-21 | 中国科学院生态环境研究中心 | Sewage treating method and apparatus by dynamic biologic membrane and activating mud |
| CN101374591A (en) * | 2005-06-24 | 2009-02-25 | 南洋理工大学 | Contaminated inflow treatment with membrane distillation bioreactor |
| CN201244449Y (en) * | 2008-07-10 | 2009-05-27 | 艾欧史密斯（上海）水处理产品有限公司 | Spiral coil type film element |
Non-Patent Citations (1)
| Title |
|---|
| ，张才菁等: "《螺旋卷式膜组件中天然气分离过程的模拟计算》", 《石油大学学报》 * |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102989322A (en) * | 2011-09-16 | 2013-03-27 | 中国科学院生态环境研究中心 | Flat plate type membrane assembly for microwave vacuum membrane distillation operation |
| CN102989322B (en) * | 2011-09-16 | 2014-10-29 | 中国科学院生态环境研究中心 | Flat plate type membrane assembly for microwave vacuum membrane distillation operation |
| CN102764592A (en) * | 2012-08-09 | 2012-11-07 | 正仁环保科技股份有限公司 | Poly tetra fluoro ethylene (PTFE) cylinder type plate membrane distiller |
| CN102764592B (en) * | 2012-08-09 | 2015-08-05 | 正仁环保科技股份有限公司 | Polytetrafluoroethylene (PTFE) cartridge type Flat Membrane distiller |
| CN103058308A (en) * | 2013-01-14 | 2013-04-24 | 山东中宇环保科技有限公司 | Multi-page rolled type film contactor for removing resolvable gases in water |
| CN103058308B (en) * | 2013-01-14 | 2015-07-08 | 山东中宇环保科技有限公司 | Multi-page rolled type film contactor for removing resolvable gases in water |
| CN103357271A (en) * | 2013-08-07 | 2013-10-23 | 清华大学 | Method and device for membrane distillation pressured at the hot side |
| CN103357271B (en) * | 2013-08-07 | 2015-06-03 | 清华大学 | Method and device for membrane distillation pressured at the hot side |
| CN106365228A (en) * | 2015-07-24 | 2017-02-01 | 北京中环膜材料科技有限公司 | Double-latent membrane distillation assembly |
| WO2017133641A1 (en) * | 2016-02-02 | 2017-08-10 | 艾欧史密斯（南京）水处理产品有限公司 | Membrane element |
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Application publication date: 20110720 |