CN103663627B - Membrane distillation concentration and utilize concentrated seawater system and concentration method - Google Patents
Membrane distillation concentration and utilize concentrated seawater system and concentration method Download PDFInfo
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- CN103663627B CN103663627B CN201310677634.6A CN201310677634A CN103663627B CN 103663627 B CN103663627 B CN 103663627B CN 201310677634 A CN201310677634 A CN 201310677634A CN 103663627 B CN103663627 B CN 103663627B
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- concentrated seawater
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- 239000012528 membrane Substances 0.000 title claims abstract description 68
- 239000013535 sea water Substances 0.000 title claims abstract description 55
- 238000004821 distillation Methods 0.000 title claims abstract description 40
- 238000000034 method Methods 0.000 title claims abstract description 13
- 239000013505 freshwater Substances 0.000 claims abstract description 16
- 239000012267 brine Substances 0.000 claims abstract description 11
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical compound O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 claims abstract description 11
- 239000000203 mixture Substances 0.000 claims abstract description 4
- 238000002425 crystallisation Methods 0.000 claims description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 10
- 239000012510 hollow fiber Substances 0.000 claims description 9
- 230000002209 hydrophobic effect Effects 0.000 claims description 9
- 230000008025 crystallization Effects 0.000 claims description 7
- 238000001223 reverse osmosis Methods 0.000 claims description 5
- 238000010438 heat treatment Methods 0.000 claims description 4
- 239000000126 substance Substances 0.000 claims description 4
- 238000009833 condensation Methods 0.000 claims description 3
- 230000005494 condensation Effects 0.000 claims description 3
- 239000000284 extract Substances 0.000 claims description 3
- 239000007788 liquid Substances 0.000 claims description 3
- 150000003839 salts Chemical class 0.000 claims description 3
- 238000011033 desalting Methods 0.000 claims 1
- 230000006378 damage Effects 0.000 abstract description 2
- 239000000463 material Substances 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000010612 desalination reaction Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 229910017053 inorganic salt Inorganic materials 0.000 description 1
- 230000010287 polarization Effects 0.000 description 1
- 238000010926 purge Methods 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 239000012266 salt solution Substances 0.000 description 1
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- Separation Using Semi-Permeable Membranes (AREA)
- Heat Treatment Of Water, Waste Water Or Sewage (AREA)
Abstract
<b> membrane distillation concentration and utilize concentrated seawater system and concentration method </b><bGreatT.Gre aT.GT.The process problem of the strong brine that current sea water desaltination produces is by social extensive concern, because strong brine is directly discharged into sea will inevitably cause the pollution of environment and ecological destruction.</b><bGreatT.Gre aT.GT composition of the present invention comprises </b><bGreatT.Gre aT.GT:? </b><bGreatT.Gre aT.GT concentrated seawater pond (</b><bGreatT.Gre aT.GT1</b><bGrea tT.GreaT.GT), described concentrated seawater pond is connected with two-stage membrane component (</b><bGreatT.Gre aT.GT5</b><bGrea tT.GreaT.GT), described two-stage membrane component respectively with strainer (</b><bGreatT.Gre aT.GT4</b><bGrea tT.GreaT.GT), condenser (</b><bGreatT.Gre aT.GT6</b><bGrea tT.GreaT.GT), plate-type heat exchanger </b><bGreatT.Gre aT.GTB</b><bGrea tT.GreaT.GT(</b>LEssT.LTssT.L Tb>8</b>LEssT.L TssT.LTb>) connect, described strainer is connected with intermediate pool (</b><bGreatT.Gre aT.GT3</b><bGrea tT.GreaT.GT), described intermediate pool and plate-type heat exchanger </b><bGreatT.Gre aT.GTA</b><bGrea tT.GreaT.GT(</b>LEssT.LTssT.L Tb>2</b>LEssT.L TssT.LTb>) be connected, described plate-type heat exchanger </b><bGreatT.Gre aT.GTA</b><bGrea tT.GreaT.GT is connected with described concentrated seawater pond, described plate-type heat exchanger </b><bGreatT.Gre aT.GTB</b><bGrea tT.GreaT.GT is connected with hose pump (</b><bGreatT.Gre aT.GT9</b><bGrea tT.GreaT.GT), described hose pump is connected with crystallizer (</b><bGreatT.Gre aT.GT10</b><bGre atT.GreaT.GT), described condenser is connected with fresh-water tank (</b><bGreatT.Gre aT.GT7</b><bGrea tT.GreaT.GT).The present invention is used for the concentrated of concentrated seawater and utilizes.</b>
Description
technical field:
the present invention relates to a kind of membrane distillation concentration and utilize concentrated seawater system and concentration method.
background technology:
membrane separation technique as a high efficiency separation, concentrated, purify and purification techniques, due to its multidisciplinary feature, can be applicable to a large amount of sepn processes.In recent years, the application of reverse osmosis method sea water desaltination gets more and more, and reverse osmosis by concentrated 1.8 times of seawater, also can occur the emission problem of a large amount of concentrated seawater simultaneously, about had the concentrated seawater of 55% charging seawater to discharge.The process problem of the strong brine that current sea water desaltination produces is by social extensive concern, because strong brine is directly discharged into sea will inevitably cause the pollution of environment and ecological destruction.
summary of the invention:
the object of this invention is to provide a kind of membrane distillation concentration and utilize concentrated seawater system and concentration method.
above-mentioned object is realized by following technical scheme:
a kind of membrane distillation concentration and utilize concentrated seawater system, its composition comprises: concentrated seawater pond, described concentrated seawater pond is connected with two-stage membrane component, described two-stage membrane component is connected with strainer, condenser, plate-type heat exchanger B respectively, described strainer is connected with intermediate pool, described intermediate pool is connected with plate-type heat exchanger A, described plate-type heat exchanger A is connected with described concentrated seawater pond, described plate-type heat exchanger B is connected with hose pump, described hose pump is connected with crystallizer, and described condenser is connected with fresh-water tank.
described membrane distillation concentration and utilize concentrated seawater system, described two-stage membrane component adopts hollow fiber form, and the film of described two-stage membrane component is asymmetric hydrophobic film.
a kind of membrane distillation concentration and utilize the concentration method of concentrated seawater system, strong brine heating sea water desaltination produced, then extracts out with feed pump, enters into asymmetric hydrophobic hollow fiber membrane distillation assembly, the salt water part of membrane distillation concentration is back to pump sump, and part enters into crystallisation chamber and carries out crystallization; Water vapor through membrane component arrives cold side under both sides differential pressure of membrane drives, and is drawn into condenser carries out condensation through Vacuum suction pump, forms fresh water, collects fresh-water tank.
beneficial effect:
1. the present invention adopts film distillation technology to carry out concentrated acquisition Freshwater resources further to the strong brine of sea water desaltination, in conjunction with Seawater Desalination Project and inorganic salt crystallisation process, chemical substance in concentrated seawater can be crystallized out simultaneously, reach recycling, realize resources conservation and environmental friendliness, reach zero release.
2. because membrane distillation system of the present invention can realize the inaccessiable highly enriched degree of sea water desaltination mode such as reverse osmosis, by utilizing sun power or factory's used heat, dense for sea water desaltination water is concentrated further the Freshwater resources that acquisition reduces day by day, and chemical substance in crystallization seawater, realize environmental friendliness, reach system zero discharge.
accompanying drawing illustrates:
accompanying drawing 1 is structural representation of the present invention.
embodiment:
embodiment 1:
a kind of membrane distillation concentration and utilize concentrated seawater system, its composition comprises: concentrated seawater pond 1, described concentrated seawater pond is connected with two-stage membrane component 5, described two-stage membrane component respectively with strainer 4, condenser 6, plate-type heat exchanger B, piece number: 8 connect, described strainer is connected with intermediate pool 3, described intermediate pool and plate-type heat exchanger A, piece number: 2 connect, described plate-type heat exchanger A is connected with described concentrated seawater pond, described plate-type heat exchanger B is connected with hose pump 9, described hose pump is connected with crystallizer 10, described condenser is connected with fresh-water tank 7.
embodiment 2:
membrane distillation concentration according to embodiment 1 and utilize concentrated seawater system, described two-stage membrane component adopts hollow fiber form, and the film of described two-stage membrane component is asymmetric hydrophobic film.
embodiment 3:
above-mentioned membrane distillation concentration and utilize the concentration method of concentrated seawater system, the strong brine heating that sea water desaltination is produced, then extract out with feed pump, enter into asymmetric hydrophobic hollow fiber membrane distillation assembly, the salt water part of membrane distillation concentration is back to pump sump, and part enters into crystallisation chamber and carries out crystallization; Water vapor through membrane component arrives cold side under both sides differential pressure of membrane drives, and is drawn into condenser carries out condensation through Vacuum suction pump, forms fresh water, collects fresh-water tank.
embodiment 4:
described membrane distillation concentration and utilize concentrated seawater system, described membrane distillation system effectively utilizes sun power or factory's used heat, and working temperature can be run at 5-75 DEG C, and native system adopts vacuum membrane distillation system, film both sides gas differential pressure is large, has larger distillating ventilating amount than other forms of membrane distillation.Adopt the design of two-stage membrane distillation, feeding manner is shell side charging.
the film of described membrane distillation is the hollow fiber film assembly that asymmetric hydrophobic material is made.Concentrated seawater concentrates by described membrane module further, while obtaining fresh water, a concentrated seawater part is got back to opening for feed, another part enters into crystallizer, and the dense water temp of controlling diaphragm distillation charging, makes film both sides there is the enough large temperature difference, thus make dense water be concentrated to the state of saturation of required salinity, controlling the supersaturation concentration of strong brine after entering crystallizer, by heating, realizing the recycling of each component in strong brine.
embodiment 5:
described membrane distillation concentration and utilize concentrated seawater system, the kit form of membrane distillation adopts hollow fiber form, has boundary layer resistance little, does not need the advantages such as extra support.Feeding manner is shell side charging.Described a kind of membrane distillation concentration and utilize concentrated seawater system, mould material adopts asymmetric hydrophobic material, and liquid penetrates pressure: 6.0-8.5bar, service temperature: 5-75 degree.System inlets pressure is less than 1bar.Described membrane distillation concentration and utilize concentrated seawater system, system adopts two-stage membrane distillation system, enters crystallizer, obtain crystal chemistry product after the concentrated salt solution of membrane module is flowed out by membrane module.Through membrane component water vapor both sides differential pressure of membrane drive under through hollow-fibre membrane, through vacuum purge enter condenser, be condensed into liquid, enter fresh-water tank.Membrane distillation process obtains larger membrane flux and higher thermal efficiency by controlling adequate operation temperature.And increase feed velocity, concentration polarization is weakened.And strong brine is reached enter the parameter request of crystallizer, can crystalline product be obtained after crystallization treatment.
embodiment 6:
described membrane distillation concentration and utilize concentrated seawater system, key equipment membrane component in native system is asymmetric hydrophobic hollow fiber membrane module, adopt vacuum membrane distillation system, film both sides gas differential pressure is large, has larger distillating ventilating amount than other forms of membrane distillation.Adopt the design of two-stage membrane distillation, feeding manner is shell side charging.Because membrane distillation system can realize the inaccessiable highly enriched degree of sea water desaltination mode such as reverse osmosis, by utilizing sun power or used heat, concentrated seawater is concentrated further the Freshwater resources that acquisition reduces day by day, and chemical substance in crystallization seawater.
Claims (2)
1.
a kind of membrane distillation concentration and utilize concentrated seawater system, its composition comprises: concentrated seawater pond, it is characterized in that: described concentrated seawater pond is connected with two-stage membrane component, described two-stage membrane component respectively with strainer, condenser, plate-type heat exchanger B connects, described strainer is connected with intermediate pool, described intermediate pool is connected with plate-type heat exchanger A, described plate-type heat exchanger A is connected with described concentrated seawater pond, described plate-type heat exchanger B is connected with hose pump, described hose pump is connected with crystallizer, described condenser is connected with fresh-water tank, described two-stage membrane component adopts hollow fiber form, liquid penetrates pressure 6.0-8.5bar, service temperature 5-75 degree, system inlets pressure is less than 1bar, the film of described two-stage membrane component is asymmetric hydrophobic film, feeding manner is shell side charging, because membrane distillation system can realize the inaccessiable highly enriched degree of reverse osmosis seawater desalting mode, by utilizing sun power or used heat, concentrated seawater is concentrated further the Freshwater resources that acquisition reduces day by day, and chemical substance in crystallization seawater.
2.
a kind of membrane distillation concentration according to claim 1 and utilize the concentration method of concentrated seawater system, it is characterized in that: the strong brine heating that sea water desaltination is produced, then extract out with feed pump, enter into asymmetric hydrophobic hollow fiber membrane distillation assembly, the salt water part of membrane distillation concentration is back to pump sump, and part enters into crystallisation chamber and carries out crystallization; Water vapor through membrane component arrives cold side under both sides differential pressure of membrane drives, and is drawn into condenser carries out condensation through Vacuum suction pump, forms fresh water, collects fresh-water tank.
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| CN201310677634.6A CN103663627B (en) | 2013-12-13 | 2013-12-13 | Membrane distillation concentration and utilize concentrated seawater system and concentration method |
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| CN201310677634.6A CN103663627B (en) | 2013-12-13 | 2013-12-13 | Membrane distillation concentration and utilize concentrated seawater system and concentration method |
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| Publication Number | Publication Date |
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| CN103663627A CN103663627A (en) | 2014-03-26 |
| CN103663627B true CN103663627B (en) | 2015-11-11 |
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| CN106237649B (en) * | 2016-07-27 | 2019-03-26 | 大唐环境产业集团股份有限公司 | A kind of membrane distillation crystallization treatment device and method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101205086A (en) * | 2006-12-21 | 2008-06-25 | 天津科技大学 | Seawater Desalination Concentrated Brine Vacuum Membrane Distillation Process |
| CN102745852A (en) * | 2012-07-18 | 2012-10-24 | 中国科学院新疆理化技术研究所 | Brine-desalination method |
| CN102923894A (en) * | 2012-10-30 | 2013-02-13 | 北京理工大学 | Process and device for treating reverse osmosis concentrated water through dual-membrane distillation |
| CN103373786A (en) * | 2012-04-28 | 2013-10-30 | 北京林业大学 | Method for treating reverse osmosis concentrate |
-
2013
- 2013-12-13 CN CN201310677634.6A patent/CN103663627B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101205086A (en) * | 2006-12-21 | 2008-06-25 | 天津科技大学 | Seawater Desalination Concentrated Brine Vacuum Membrane Distillation Process |
| CN103373786A (en) * | 2012-04-28 | 2013-10-30 | 北京林业大学 | Method for treating reverse osmosis concentrate |
| CN102745852A (en) * | 2012-07-18 | 2012-10-24 | 中国科学院新疆理化技术研究所 | Brine-desalination method |
| CN102923894A (en) * | 2012-10-30 | 2013-02-13 | 北京理工大学 | Process and device for treating reverse osmosis concentrated water through dual-membrane distillation |
Non-Patent Citations (1)
| Title |
|---|
| 膜蒸馏-结晶技术及在海水制盐中的应用;曹冬梅等;《盐业与化工》;20120630;第41卷(第6期);摘要部分，第38页右栏第2段 * |
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