CN110342599A - A kind of membrane distillation purified water preparation system - Google Patents
A kind of membrane distillation purified water preparation system Download PDFInfo
- Publication number
- CN110342599A CN110342599A CN201910599676.XA CN201910599676A CN110342599A CN 110342599 A CN110342599 A CN 110342599A CN 201910599676 A CN201910599676 A CN 201910599676A CN 110342599 A CN110342599 A CN 110342599A
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- China
- Prior art keywords
- heat
- purified water
- membrane
- raw material
- water preparation
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 239000012528 membrane Substances 0.000 title claims abstract description 65
- 238000004821 distillation Methods 0.000 title claims abstract description 48
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 40
- 238000002360 preparation method Methods 0.000 title claims abstract description 22
- 239000008213 purified water Substances 0.000 title claims abstract description 21
- 239000002994 raw material Substances 0.000 claims abstract description 39
- 238000010438 heat treatment Methods 0.000 claims abstract description 32
- 230000006835 compression Effects 0.000 claims abstract description 30
- 238000007906 compression Methods 0.000 claims abstract description 30
- 239000002918 waste heat Substances 0.000 claims description 7
- 238000009834 vaporization Methods 0.000 claims description 3
- 230000008016 vaporization Effects 0.000 claims description 3
- 239000013535 sea water Substances 0.000 abstract description 13
- 238000010612 desalination reaction Methods 0.000 abstract description 9
- 238000009833 condensation Methods 0.000 abstract description 6
- 230000005494 condensation Effects 0.000 abstract description 6
- 238000004064 recycling Methods 0.000 abstract description 4
- 230000015556 catabolic process Effects 0.000 abstract description 2
- 238000006731 degradation reaction Methods 0.000 abstract description 2
- 239000000725 suspension Substances 0.000 abstract description 2
- 239000007788 liquid Substances 0.000 description 8
- 238000005516 engineering process Methods 0.000 description 7
- 239000010865 sewage Substances 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- 238000000746 purification Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 239000013505 freshwater Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 238000001223 reverse osmosis Methods 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 125000004122 cyclic group Chemical group 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000011033 desalting Methods 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 230000002209 hydrophobic effect Effects 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000010025 steaming Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
- 239000003643 water by type Substances 0.000 description 1
Classifications
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
- C02F1/08—Thin film evaporation
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/08—Seawater, e.g. for desalination
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
- Y02A20/124—Water desalination
Abstract
The invention discloses a kind of membrane distillation purified water preparation systems, comprising: membrane module, heating component, both vapor compression component, heat exchanger assembly.Inventive film distillation seawater desalination system is by the pure aqueous distillate for the steam form for generating membrane distillation after the compression heating of both vapor compression component, the raw material being passed through in membrane module is heated by heat exchanger assembly again, to convert the recycling and reusing that high-grade energy carries out energy for the low-grade condensation heat in pure aqueous distillate, while reducing system complexity, avoids in conventional heat pump system and existed and degradation problem caused by heat transfer loss as the temperature difference.Heating component is used to heat the raw material being passed through in membrane module in the starting of entire membrane distillation purified water preparation system, during stable operation, energy needed for running can be only provided by both vapor compression component to system, and heating component can be only run once in a while when needed for system additional heat with operation suspension.
Description
Technical field
The present invention relates to pure water preparation technical fields, more particularly to a kind of membrane distillation purified water preparation system.
Background technique
With social development, the demand of fresh water is dramatically increasing over the past decades.By the end of the year 2013, Global Seawater is light
Changing yield is about 4.773 × 109m3/ d, until the same year, total water yield that China is completed desalination plant is also had reached
890.3kt/d.Global Seawater desalting engineering gross investment has reached tens billion of dollars at present, and just with annual 20% or so speed
It is incremented by.Currently in built sea water desalination installed capacity, reverse osmosis membrane (RO) accounts for 70%.But there are desalination waters for RO technology
The problems such as rate of recovery is low, seawater enrichment is not high enough.Film distillation technology has many excellent in terms of sea water desalination, solution concentration
Gesture, in recent years by the extensive concern of researcher.
Film distillation technology combines membrane technology with traditional evaporation technology, using hydrophobic membrane by hot side liquid to be processed and cold side
It separates, only gas is allowed to pass through.Using film two sides vapor pressure differential, pass through easy vaporized components and export in a certain way, uses
To realize the separation or purification of feed liquid.Compared to traditional handicrafts such as reverse osmosis membranes, film distillation technology has solute rejection height, behaviour
Make that temperature, pressure is low, can handle the advantages such as highly concentrated solution.Film distillation technology can be used for sea water desalination, separation heat-sensitive substance with
Handle high-concentration waste water.
But membrane distillation method power consumption is larger simultaneously, and has the more condensation latent heat for recycling in vapor.Currently to
The major way for recycling membrane distillation process condensation heat is to condense steam and the lower heat exchanger wall face contact of temperature, and heat can quilt
Feed liquid directly absorbs, or is absorbed by other systems.Often being absorbed under low-temp low-pressure two-phase state using cryogen in heat pump system should
Condensation heat, after compressor compresses, state becomes high temperature and pressure, then carries out heat release and heat to feed liquid.
Similar recuperation of heat mode requires the presence of certain temperature difference, i.e. the temperature to recovering condensing heat wall surface or medium is answered
Lower than the vapor (steam) temperature that membrane module generates, therefore feed liquid can not be heated to required operation temperature, and there is still a need for additional for whole system
Equipment feed liquid is heated.If carrying out heat recovery using closed type hot pumping system, it is multiple that system can be further increased
Miscellaneous degree, and due to the presence of the above-mentioned temperature difference, cryogen before compression after pressure difference it is bigger, the coefficient of performance of heat pump system can be further
It reduces.
Summary of the invention
The present invention is directed to the deficiencies in the prior art, provides a kind of membrane distillation pure water system that capacity usage ratio is high
Standby system.
A kind of membrane distillation purified water preparation system, comprising:
Membrane module is separated into feed side and fraction side by membrane module, including distillation film, the distillation film, and the membrane module is used
In pure aqueous distillate is made by membrane distillation in raw material；
Heating component, the raw material for that will be passed through membrane module heat vaporization；
Both vapor compression component heats up for compressing pure aqueous distillate；
Heat exchanger assembly, for the pure aqueous distillate of compression heating to be carried out heat exchange with the raw material for being passed through membrane module.
Raw material used can be seawater, for use in sea water desalination；It is also possible to sewage, for use in sewage purification.
Preferably, the heat exchanger assembly includes the heat-exchange tube set on the feed side.
It is furthermore preferred that the fraction side is equipped with the fraction collection pipe that outlet end connects the heat-exchange tube, the vapour pressure
Contracting component includes being passed through hot friendship after the pure aqueous distillate compression on the fraction collection pipe, for generating membrane distillation heats up
Change the first vapour compression machine of pipe.
It is furthermore preferred that the outlet end of the heat-exchange tube connects water tank by collecting pipe.
Preferably, the feed side is equipped with into mother tube and out clout pipe, described to set into mother tube and out between clout pipe
There is the First Heat Exchanger of raw material in the waste heat transmitting feed mother tube for clout in clout pipe will to be gone out.
It is furthermore preferred that described be equipped with driving water pump into the downstream for being located at First Heat Exchanger on mother tube.
It is further preferred that described be equipped with valve into being located on mother tube between First Heat Exchanger and driving water pump.
Preferably, the heating component include for be passed through membrane module raw material heat the second heat exchanger, for producing
The evaporator of heat steam and the second vapour compression machine for hot steam to be inputted to second heat exchanger.
Inventive film distills purified water preparation system to be passed through by the pure aqueous distillate for the steam form for generating membrane distillation
After the compression heating of both vapor compression component, then pass through heat exchanger assembly and the raw material being passed through in membrane module is heated, thus by pure
Low-grade condensation heat in water purification fraction is converted into the recycling and reusing that high-grade energy carries out energy, reduces system complexity
Meanwhile it avoiding in conventional heat pump system and being existed and degradation problem caused by heat transfer loss as the temperature difference.Heating component is used for
The raw material being passed through in membrane module is heated in the starting of entire membrane distillation purified water preparation system, during stable operation,
Energy needed for running can be only provided by both vapor compression component to system, and heating component can only needed with operation suspension
When run once in a while for system additional heat.
Detailed description of the invention
Fig. 1 is the structural schematic diagram that inventive film distills purified water preparation system.
Fig. 2 is the structural schematic diagram of membrane module.
Specific embodiment
As illustrated in fig. 1 and 2, a kind of membrane distillation purified water preparation system, including membrane module 1, heating component 7, both vapor compression
Component and heat exchanger assembly.
Membrane module 1 includes distillation film 11, distills film 11 for membrane module 1 and is separated into feed side 12 and fraction side 13, feed side
12 are equipped with into mother tube 2, go out clout pipe 3.The structure of film 11 itself is distilled using in the prior art for sea water desalination or sewage
Processing prepares the distillation film of pure water, and the feed side 12 of distillation film 11 is passed through seawater as raw material and is used to prepare fresh water, can also be with
Sewage is passed through as raw material and is used to prepare pure water, temperature after heating increases, and steam pressure is larger, and 13 temperature of fraction side compared with
Low, steam pressure is lower, using distillation 11 two sides vapor pressure differential of film, in raw material it is a part of it is water by distillation film 11 at
Fraction side 13 is entered for fraction, to realize the sea water desalination or sewage purification of distillation embrane method.
Heat exchanger assembly, for the pure aqueous distillate of compression heating to be carried out heat exchange with the raw material for being passed through membrane module 1.Heat
Exchange component includes the heat-exchange tube 14 set on feed side 12.
Fraction side 13 is equipped with the fraction collection pipe 4 of outlet end connection heat-exchange tube 14.Both vapor compression component is used for will be pure
Aqueous distillate compression heating, both vapor compression component include on fraction collection pipe 4, the both vapor compression liter for generating membrane distillation
The first vapour compression machine 41 of heat-exchange tube 14 is passed through after temperature.The outlet end of heat-exchange tube 14 connects water tank by collecting pipe 5
6.Although the steam temperature generated after membrane distillation is lower than the material temperature of feed side, but temperature with higher, such as
Fruit is directly collected, then this partial heat just lost, so by using the first vapour compression machine 41 by the steam after permeable membrane
It is compressed to high-temperature high-pressure state, is still gaseous state, then into heat-exchange tube 14, for the subsequent original into feed side 12
Material is heated, so that part of waste heat is reused, these final steam temperature after heat-exchange tube 14 is reduced,
It is entered in water tank 6 and is stored with gas-liquid mixture phase.
Part water is separated in raw material after membrane distillation, and remainder salinity or pollutant concentration are higher, is passed through
Clout pipe 3 flows out membrane module 1 out.Be equipped between clout pipe 3 into mother tube 2 and out for will go out clout in clout pipe 3 (concentration compared with
Raw material after high and concentration containing certain waste heat) waste heat transmitting feed mother tube 2 in raw material First Heat Exchanger 31.Into raw material
Driving water pump 21 is equipped with positioned at the downstream of First Heat Exchanger 31 on pipe 2.It is located at First Heat Exchanger 31 and driving water on into mother tube 2
Valve 22 is equipped between pump 21.
Heating component 7 is used to be passed through the raw material heating vaporization of membrane module 1.Heating component 7 includes for into mother tube 2
Second heat exchanger 71 of interior raw material heating, the evaporator 72 for generating hot steam and for by the second heat exchange of hot steam input
Second vapour compression machine 73 of device 71.In heating component 7, throttle valve 74 is additionally provided with positioned at the upstream of evaporator 72.Due to this Shen
Please membrane distillation purified water preparation system starting when there are no enough steam generations, so can not be by heat-exchange tube 14 to raw material
It is heated, so needing first to provide the heat of some startings to raw material, can be before raw material enters into mother tube 2,
It can be raw material to be heated when into mother tube 2.Heating component 7 is one of for adding into raw material in mother tube 2
The method of heat.Certainly, in addition to startup stage, during follow-up operation, if it is necessary, still can also pass through heating component
7 pairs of raw materials carry out certain supplementary heating, so that the application membrane distillation purified water preparation system is able to maintain continuous operation.
The application membrane distillation purified water preparation system at runtime, from being provided into mother tube 2 to the feed side 12 of membrane module 1
Seawater or sewage to be processed, heating component 7 are heated into the raw material in mother tube 2, and the raw material after heating enters membrane module 1
Feed side 12, the temperature of feed side 12 is compared with 13 temperature of fraction side height, and the steam pressure of feed side 12 is high compared with fraction side 13, due to
The presence of 11 two sides pressure difference of film is distilled, the hydrone of part enters fraction side 13 through distillation film 11 and forms steam in raw material,
Steam enters fraction collection pipe 4 from fraction side 13, is compressed to high-temperature high-pressure state through the first vapour compression machine 41, then steam
It enters in heat-exchange tube 14, is heated for the raw material to feed side 12, and these steam itself are then passing through heat exchange
Condensation, which forms gas-liquid mixture phase and enters in water tank 6, after pipe 14 is stored；Raw material is carrying out membrane distillation by membrane module 1
Afterwards, remainder concentration is got higher, and membrane module 1 is discharged by going out clout pipe 3, these remaining high concentration raw materials also have certain
Waste heat can use, by First Heat Exchanger 31 by waste heat pass to from be newly supplemented in into mother tube 2 come raw material, make raw material temperature
Degree carries out preliminary heating.When entire cyclic process steadily carries out, heating component 7 can only rely on the first steaming with break-off
Vapour compressor 41 provides both vapor compression in fraction collection pipe 4 heat, and heating component 7 is in addition to the use when whole system starts
Outside, subsequent only to carry out intermittent operation when needed.
Claims (8)
1. a kind of membrane distillation purified water preparation system characterized by comprising
Membrane module is separated into feed side and fraction side by membrane module, including distillation film, the distillation film, and the membrane module is used for will
Pure aqueous distillate is made by membrane distillation in raw material；
Heating component, the raw material for that will be passed through membrane module heat vaporization；
Both vapor compression component heats up for compressing pure aqueous distillate；
Heat exchanger assembly, for the pure aqueous distillate of compression heating to be carried out heat exchange with the raw material for being passed through membrane module.
2. membrane distillation purified water preparation system as described in claim 1, which is characterized in that the heat exchanger assembly includes being set to
The heat-exchange tube of the feed side.
3. membrane distillation purified water preparation system as claimed in claim 2, which is characterized in that the fraction side connects equipped with outlet end
The fraction collection pipe of the heat-exchange tube is connect, the both vapor compression component includes being set on the fraction collection pipe, being used for film
The first vapour compression machine of heat-exchange tube is passed through after the pure aqueous distillate compression heating that distillation generates.
4. membrane distillation purified water preparation system as claimed in claim 2, which is characterized in that the outlet end of the heat-exchange tube is logical
Cross collecting pipe connection water tank.
5. membrane distillation purified water preparation system as described in claim 1, which is characterized in that the feed side is equipped with into mother tube
Clout pipe out, it is described into mother tube and former equipped with the waste heat transmitting feed for clout in clout pipe will to be gone out between clout pipe out
The First Heat Exchanger of raw material in expects pipe.
6. membrane distillation purified water preparation system as claimed in claim 5, which is characterized in that described into being located at first on mother tube
The downstream of heat exchanger is equipped with driving water pump.
7. membrane distillation purified water preparation system as claimed in claim 6, which is characterized in that described into being located at first on mother tube
Valve is equipped between heat exchanger and driving water pump.
8. membrane distillation purified water preparation system as described in claim 1, which is characterized in that the heating component include for pair
It is passed through the second heat exchanger, the evaporator for generating hot steam and for hot steam to be inputted institute of the raw material heating of membrane module
State the second vapour compression machine of the second heat exchanger.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910599676.XA CN110342599A (en) | 2019-07-04 | 2019-07-04 | A kind of membrane distillation purified water preparation system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910599676.XA CN110342599A (en) | 2019-07-04 | 2019-07-04 | A kind of membrane distillation purified water preparation system |
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| Publication Number | Publication Date |
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| CN110342599A true CN110342599A (en) | 2019-10-18 |
Family
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| CN201910599676.XA Pending CN110342599A (en) | 2019-07-04 | 2019-07-04 | A kind of membrane distillation purified water preparation system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112090284A (en) * | 2020-09-18 | 2020-12-18 | 中国人民解放军海军勤务学院 | Membrane distillation industrial wastewater concentration method based on compression heat pump |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5926184A (en) * | 1982-08-06 | 1984-02-10 | Sasakura Eng Co Ltd | Compressed steam-type distillation of salt water |
| CN106946318A (en) * | 2016-12-30 | 2017-07-14 | 朱兆奇 | The low energy consumption concentrating and separating method and its recovery of latent heat vacuum membrane distillation component of a kind of aqueous solution containing Nonvolatile solute |
| KR101781026B1 (en) * | 2016-04-15 | 2017-09-25 | 국민대학교산학협력단 | Membrane distillation water treatment apparatus and method using vapor compression |
| CN210764427U (en) * | 2019-07-04 | 2020-06-16 | 浙江大学 | Pure water preparation system of membrane distillation |
-
2019
- 2019-07-04 CN CN201910599676.XA patent/CN110342599A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5926184A (en) * | 1982-08-06 | 1984-02-10 | Sasakura Eng Co Ltd | Compressed steam-type distillation of salt water |
| KR101781026B1 (en) * | 2016-04-15 | 2017-09-25 | 국민대학교산학협력단 | Membrane distillation water treatment apparatus and method using vapor compression |
| CN106946318A (en) * | 2016-12-30 | 2017-07-14 | 朱兆奇 | The low energy consumption concentrating and separating method and its recovery of latent heat vacuum membrane distillation component of a kind of aqueous solution containing Nonvolatile solute |
| CN210764427U (en) * | 2019-07-04 | 2020-06-16 | 浙江大学 | Pure water preparation system of membrane distillation |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112090284A (en) * | 2020-09-18 | 2020-12-18 | 中国人民解放军海军勤务学院 | Membrane distillation industrial wastewater concentration method based on compression heat pump |
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