CN103663627A - Membrane distillation concentration and concentrated seawater using system and concentration method - Google Patents
Membrane distillation concentration and concentrated seawater using system and concentration method Download PDFInfo
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- CN103663627A CN103663627A CN201310677634.6A CN201310677634A CN103663627A CN 103663627 A CN103663627 A CN 103663627A CN 201310677634 A CN201310677634 A CN 201310677634A CN 103663627 A CN103663627 A CN 103663627A
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Abstract
The invention provides a membrane distillation concentration and concentrated seawater using system and a concentration method. As strong brine directly discharged to sea inevitably causes environmental pollution and ecological damage, the treatment of the strong brine generated due to seawater distillation attracts the extensive attention of society. The membrane distillation concentration and concentrated seawater using system comprises a concentrated seawater tank (1) which is connected to a two-stage membrane distillation assembly (5), wherein the two-stage membrane distillation assembly (5) is respectively connected to a filter (4), a condenser (6) and a plate-type heat exchanger B (8), the filter is connected to a middle water tank (3) which is connected to a plate-type heat exchanger A (2), the plate-type heat exchanger A (2) is connected to the concentrated seawater tank, the plate-type heat exchanger B (8) is connected to a hose pump (9) which is connected to a crystallizing tank (10), and the condenser is connected to a freshwater tank (7). The membrane distillation concentration and concentrated seawater using system is used for concentration and utilization of concentrated seawater.
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, purification 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 is more and more, and reverse osmosis can also occur the emission problem of a large amount of concentrated seawaters simultaneously by concentrated 1.8 times of seawater, approximately has the concentrated seawater discharge of 55% charging seawater.The processing problem of the strong brine that sea water desaltination at present produces, by social extensive concern, will inevitably cause the pollution of environment and ecological destruction because strong brine is directly discharged into sea.
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 realizes 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 distillation assembly, described two-stage membrane distillation assembly 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 distillation assembly adopts tubular fibre formula, and the film of described two-stage membrane distillation assembly is asymmetric hydrophobic film.
a kind of membrane distillation concentration and utilize the concentration method of concentrated seawater system, the strong brine heating that sea water desaltination is produced, then extracts out with feed pump, enters into asymmetric hydrophobic tubular fibre membrane distillation assembly, the salt solution partial reflux of membrane distillation concentration is to pump sump, and part enters into crystallisation chamber and carries out crystallization; The water vapor that sees through membrane distillation assembly 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 the further concentrated Freshwater resources that obtain 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, the dense water of sea water desaltination is further concentrated and obtains the Freshwater resources that day by day reduce, and chemical substance in crystallization seawater, realize environmental friendliness, reach system zero discharge.
accompanying drawing explanation:
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 distillation assembly 5, described two-stage membrane distillation assembly 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:
according to the membrane distillation concentration described in embodiment 1 and utilize concentrated seawater system, described two-stage membrane distillation assembly adopts tubular fibre formula, and the film of described two-stage membrane distillation assembly 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 with feed pump, extract out, enter into asymmetric hydrophobic tubular fibre membrane distillation assembly, the salt solution partial reflux of membrane distillation concentration is to pump sump, and part enters into crystallisation chamber and carries out crystallization; The water vapor that sees through membrane distillation assembly 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 is effectively utilized sun power or factory's used heat, and working temperature can be moved at 5-75 ℃, and native system adopts vacuum membrane distillation system, film both sides gas differential pressure is large, than other forms of membrane distillation, has larger distillating ventilating amount.Adopt the design of two-stage membrane distillation, feeding manner is shell side charging.
the film that described membrane distillation is used is the hollow fiber film assembly that asymmetric hydrophobic material is made.Described membrane module is further concentrated by concentrated seawater, when 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 have the enough large temperature difference, thereby make dense water be concentrated to the state of saturation of required salinity, enter the supersaturation concentration of controlling strong brine after crystallizer, by heating, realize 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 tubular fibre formula, has frictional belt 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 intake pressure is less than 1bar.Described membrane distillation concentration and utilize concentrated seawater system, system adopts two-stage membrane distillation system, after the concentrated salt solution of membrane module is flowed out by membrane module, enters crystallizer, obtains crystal chemistry product.The water vapor that sees through membrane distillation assembly sees through hollow-fibre membrane under both sides differential pressure of membrane drives, and through vacuum, purges and enters condenser, is condensed into liquid, enters fresh-water tank.Membrane distillation process obtains larger membrane flux and higher thermal efficiency by controlling suitable service temperature.And increase feed velocity, concentration polarization is weakened.And strong brine is reached enter the parameter request of crystallizer, after crystallization treatment, can obtain crystalline product.
embodiment 6:
described membrane distillation concentration and utilize concentrated seawater system, key equipment membrane distillation assembly in native system is asymmetric hydrophobic hollow fiber membrane module, adopt vacuum membrane distillation system, film both sides gas differential pressure is large, than other forms of membrane distillation, has larger distillating ventilating amount.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 further concentrated and obtains the Freshwater resources that day by day reduce, and chemical substance in crystallization seawater.
Claims (3)
1. a 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 distillation assembly, described two-stage membrane distillation assembly 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.
2. membrane distillation concentration according to claim 1 and utilize concentrated seawater system, is characterized in that: described two-stage membrane distillation assembly adopts tubular fibre formula, and the film of described two-stage membrane distillation assembly is asymmetric hydrophobic film.
3. a membrane distillation concentration according to claim 1 and 2 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 with feed pump, extract out, enter into asymmetric hydrophobic tubular fibre membrane distillation assembly, the salt solution partial reflux of membrane distillation concentration is to pump sump, and part enters into crystallisation chamber and carries out crystallization; The water vapor that sees through membrane distillation assembly 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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| CN103663627A true CN103663627A (en) | 2014-03-26 |
| CN103663627B CN103663627B (en) | 2015-11-11 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106237649A (en) * | 2016-07-27 | 2016-12-21 | 大唐环境产业集团股份有限公司 | A kind of Membrane Materials crystallization treatment device and method |
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| 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 |
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2013
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| 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 |
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| 曹冬梅等: "膜蒸馏-结晶技术及在海水制盐中的应用", 《盐业与化工》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106237649A (en) * | 2016-07-27 | 2016-12-21 | 大唐环境产业集团股份有限公司 | A kind of Membrane Materials crystallization treatment device and method |
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