CN201139961Y - Energy-saving pressure reduction film distillation equipment - Google Patents
Energy-saving pressure reduction film distillation equipment Download PDFInfo
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- CN201139961Y CN201139961Y CNU2007201000273U CN200720100027U CN201139961Y CN 201139961 Y CN201139961 Y CN 201139961Y CN U2007201000273 U CNU2007201000273 U CN U2007201000273U CN 200720100027 U CN200720100027 U CN 200720100027U CN 201139961 Y CN201139961 Y CN 201139961Y
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- membrane module
- pressure
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- heat exchanger
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- 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
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- 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
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/52—Heat recovery pumps, i.e. heat pump based systems or units able to transfer the thermal energy from one area of the premises or part of the facilities to a different one, improving the overall efficiency
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- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
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- 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
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/30—Wastewater or sewage treatment systems using renewable energies
- Y02W10/37—Wastewater or sewage treatment systems using renewable energies using solar energy
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- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The utility model relates to a vacuum membrane distillation device capable of heat recovery, which comprises a membrane distillation device, a heat recovery system, a heating device, a pressure relief device, a liquid circulation system, a pretreatment system, a control and detection system. The vacuum membrane distillation device is capable of utilizing low-temperature heat source and is high in thermal utilization ratio, equipment efficiency and desalination rate, and wide in application range.
Description
Technical field
The utility model belongs to water treatment and environmental protective chemical industry technical field, particularly a kind of pressure reducing film distillation (VMD) device that can effectively carry out heat recovery.
Background technology
The shortage of freshwater resources and the pollution of water environment are the serious problems that we face, and water purification is produced in desalination from the vast oceans, abundant bitter or industrial wastewater, are a kind of effective ways that solves shortage of fresh water and open up new fresh water sources.
And the present various desalter overwhelming majority are suitable for handling the salt-containing solution of low concentration, and for different scales have the water treatment of higher concentration soda acid salt be not suitable for or cost too high.The utility model provides a kind of new energy-saving pressure-reduction film distillation (Vacuum MembraneDistillation is hereinafter to be referred as VMD) water treatment facilities, not only can be applied to the water treatment of low concentrated acid, alkali, salt, and can be advantageously applied to the water treatment of high concentrated acid, alkali, salt, have that energy consumption is low, simple in structure, price is low, the salt rejection rate advantages of higher.
Summary of the invention
The purpose of this invention is to provide a kind of efficient pressure reducing film distillation (VMD) device that can significantly improve heat utilization efficiency and be suitable for variable concentrations soda acid saline treatment.
In the film distillation used film be porous and the hydrophobic membrane of quilting liquid wetting not, a side of film is the pending hydrothermal solution that directly contacts with film, owing to the hydrophobicity of film, the aqueous solution can not pass through from fenestra; The opposite side of film is subjected to vacuum decompression makes the film both sides produce pressure reduction, and volatile components is in the film surface vaporization of feed liquid high temperature side, and steam is delivered to the opposite side (low-pressure side) of film by fenestra, is condensed into liquid then.The loss of evaporation latent heat is that the film distillation is considered to the hear rate major reason for higher, carries out latent heat and reclaims the running cost that the raising heat utilization efficiency can effectively reduce the film distillation.
The design of recuperation of heat VMD of the present invention system with make several aspects of considering emphatically and be:
(1) film distillation film component makes up in the mode of series connection, and the high temperature feed liquid is passed through membrane module successively; (2) heat exchanger makes up with the series connection form, and links to each other with the vacuum low-pressure side of membrane module respectively, and flows through with the opposite side of opposite direction from heat exchanger by the low temperature feed liquid behind the membrane module; (3) the different temperatures steam that obtains in the membrane module from series connection under the effect of vacuum carries out condensation by the heat exchanger with the combination of series connection form respectively, and reclaims its latent heat; (4) recycle its latent heat after the part uncondensed vapor is heated and boosted; (5) the low temperature feed liquid is by the condensed water of higher temperature and relief liquor heating
For achieving the above object, pressure-reduction distillation device provided by the invention (as shown in Figure 1) comprises seven parts:
1, pretreatment system: select different pre-processing devices and technology for use according to the heterogeneity of used feed liquid, comprise that mainly air supporting, flocculation, precipitation, husky filter, absorption, membrane filtration etc. are to remove suspension, gel, solid particle and other composition harmful to the film system in the feed liquid.Preliminary treatment was implemented before feed liquid enters the circulatory system.
2, fluid circulation system: comprise raw material liquid pump, circulating pump, pipe-line system, aqua storage tank (jar) etc. and flow, temperature, pressure, concentration monitor instrument and control valve etc.If have the cohesion, the deposited phenomenon that produce owing to factors such as feed concentration increase and high temperature in the circulatory system, then need in the circulatory system, increase relevant device to remove these formed coagulative precipitation things in the film still-process, mainly comprise measures such as precipitation, filtration.
3, heater: select for use the different heating device that material liquid is heated to 50-＜100 ℃ according to different heat sources, heater can be various boilers, liquid-liquid and vapour/gas liquid exchanger, solar heat collector etc., the utilizable energy source comprises (industry) used heat/waste heat, steam, electric energy, solar energy, underground heat etc. and can utilize fuel, such as natural gas, coal gas, biogas etc.
4, film distillation desalination system: the film that is composed in series mutually by a plurality of film distillation film components 7.1,7.2,7.3,7.4,7.5,7.6..... distills desalination system.This film Distallation systm also can be made up of the connection in series-parallel of a plurality of membrane module group.Film distillation film component can be the membrane module of the multiple version that is made of nonpolar perforated membrane.
5, heat recovery system: form by a plurality of series-parallel heat exchangers.As shown in Figure 1, heat exchanger 8.1,8.2,8.3,8.4,8.5,8.6 links to each other with membrane module 7.1,7.2,7.3,7.4,7.5,7.6 respectively, directly to retrieve the condensation heat from the steam of membrane module; Heat exchanger 8.7 and 8.8 is respectively in order to reclaim the be not condensed heat of steam and discharge liquid of high temperature condensation distilled water, part; Heat exchanger 8.9 is finally reduced near normal temperature for making condensation distillation water temperature.The size of heat exchanger need determine according to the steam discharge rate of membrane module, and the form of heat exchanger can be the heat-exchanger rig that shell-and-tube, various forms such as flat are suitable for vapour-liquid, liquid-liquid heat exchange operating mode.
If heating system is used Steam Heating, can be heated by vapour injection formula heat pump through steam still uncooled after 8.6 and 8.7 on the basis of the above enters heater after the pressurization and utilizes.Steam jet heat pump also can directly be connected with membrane module 7.1,7.2,7.3,7.4,7.5,7.6 as required, directly through being used for the heat cycles feed liquid after the pressurization intensification, steam is condensed into distilled water in the process of heat cycles feed liquid the steam of extracting out in membrane module.
6, pressure regulating equipment: be used to keep the negative pressure corresponding to the opposite side of cycle stock liquid film, the vavuum pump of various ways can be used for this desalination system.If the use Steam Heating, partly or entirely negative pressure can be produced by the use of steam jet heat pump.
7, system's control and detection: comprise the control and the test of flow velocity, temperature, pressure, concentration etc.
Water treatment facilities of the present invention can effectively reclaim and reuse most of evaporation latent heat, effectively the various soda acid saline solutions of (separation) processing variable concentrations.This pressure reducing film distillation separator not only can be used for being evaporated to water the various separation processes on basis, and can be used for the separation of the low dense volatile organic matter in the solution and removing of dissolved gas.Apparatus of the present invention can be according to the actual requirements, and the membrane area by increasing single membrane module, the quantity of series component and the parallel connection designs of carrying out many group membrane modules are improved the treating capacity and the scale of equipment.
Description of drawings
Fig. 1 is a heat recovery pressure-reduction distillation device schematic diagram: 1.1, raw water, 1.2, the discharging dope, 1.3, distilled water, 1.4, cooling water, 1.5, steam, 2, pretreatment unit, 3.1, the raw material liquid pump, 3.2, material liquid circulating pump, 3.3, vavuum pump, 4.1, flowmeter, 4.2, thermometer, 4.3, Pressure gauge, 4.4, conductivity meter, 4.5, valve, 5.1, reservoir, 5.2, surge tank, 6.1, steam jet heat pump, 6.2, heater, 7.1,7.2,7.3,7.4,7.5,7.6, film distillation film component, 8.1,8.2,8.3,8.4,8.5,8.6,8.7,8.8,8.9, heat exchanger, 9, steam-water seperator.
The specific embodiment
As shown in Figure 1, sent into the film Distallation systm by raw material liquid pump (3.1), after heat exchanger (8.6,8.8,8.7) preheating, in reservoir (5.1), mix with the high concentration circulation fluid through the aqueous solution of raw material (1.1) of preliminary treatment (2).Mixed liquor enters heater (6.2) and is heated to predetermined temperature after circulating pump (3.2) pressurization, then the membrane module (7.1,7.2,7.3,7.4,7.5,7.6) of connecting by series in proper order with certain flow velocity.In membrane module (7.1,7.2,7.3,7.4,7.5,7.6), water in the high temperature feed liquid is vaporized, and the steam (temperature from high to low) of different temperatures enters heat exchanger (8.1,8.2,8.3,8.4,8.5,8.6) respectively and carries out condensing heat-exchange under vacuum (3.3) acts on.From the interior low temperature feed liquid that is further concentrated that flows out of afterbody membrane module (7.6), the order side that enters heat exchanger (8.5,8.4,8.3,8.2,8.1) is carried out heat exchange with opposite side from the steam of membrane module again, consequently material liquid is heated, and steam is condensed.The steam of extracting out from afterbody membrane module (7.6) is used to (by heat exchanger (8.6)) heat make-up aqueous solution of raw material (1.1) owing to its temperature is lower.By heat exchanger (8.5,8.4,8.3,8.2,8.1) condensation and have the distilled water of higher temperature and the part uncondensated steam by heat exchanger (8.7) to replenishing further heating of aqueous solution of raw material (1.1).Additional aqueous solution of raw material (1.1) that is preheated and the recycle feed liquid that heats through heat exchanger (8.5,8.4,8.3,8.2,8.1) flow into reservoir (5.1) jointly, are heated (6.2) after the mixing once more and carry out the film distillation.
The high dense material liquid of part in the circulating system (1.2) is discharged the film Distallation systm by control valve (4.5), its part heat exchanges recovery by heat exchanger (8.8) with fill-in feed liquid (1.1), the distilled water (1.3) that is stored in surge tank (5.2) simultaneously also constantly disengages in the film Distallation systm, and the additional of aqueous solution of raw material (1.1) imported the film Distallation systm by raw material liquid pump (3.1).
Distilled water after process heat exchanger (8.6 and 8.7) condensation and the cooling and the small amount of steam that may exist are used by the further back that lowers the temperature of heat exchanger (8.9).If the film Distallation systm uses steam (1.5) heating, the steam that is not condensed is at last got back to heater (6.2) heat cycles material liquid after the pressurization of being heated by steam jet heat pump (6.1) through steam-water seperator (9) back.In addition, steam jet heat pump (6.1) also can directly be connected with membrane module as required, the steam of extracting out in membrane module directly passed through be used for the heat cycles feed liquid after steam jet heat pump (6.1) pressurization heats up, be condensed into distilled water in the process of steam heat cycles feed liquid in heater (6.2).
Material aqueous solution: seawater
Preliminary treatment: precipitation, husky filter, micro-filtration
Film and membrane module: polypropylene hollow fiber membrane, plate and frame cross-flow membrane modular construction
Heat reclamation device: shell-and-tube titanium matter heat exchanger, steam jet heat pump
Heating: thermal source is steam power plant's exhaust steam, 90 ℃ of the membrane module inlet temperatures of material liquid
The result: product is distilled water, 12% saliferous concentrated seawater, heat recovery and utilization rate 85%.
Material aqueous solution: the industrial wastewater of sulfur acid (1M) and hydrochloric acid (1M)
Preliminary treatment: micro-filtration
Film and membrane module: polytetrafluoroethylene (PTFE) hollow-fibre membrane, shell-and-tube membrane module structure
Heat reclamation device: plastic material heat exchanger, steam jet heat pump
Heating: low-pressure steam, 85 ℃ of the membrane module inlet temperatures of material liquid
The result: product is distilled water, the high dense aqueous acid that contains, heat recovery and utilization rate 80%.
Material aqueous solution: high salinity organic synthesis industrial wastewater (wherein sodium chloride 8%, other slaine content 1%, COD 8000ppm)
Preliminary treatment: precipitation, micro-filtration, ultrafiltration
Film and membrane module: poly(4-methyl-1-pentene) hollow-fibre membrane, shell-and-tube cross-flow modular construction
Heat reclamation device: corronil votator
Heating: flammable industrial waste gas, 76 ℃ of the membrane module inlet temperatures of material liquid
The result: product is distilled water, 30% saliferous concentrate, heat recovery and utilization rate 66%.
Claims (6)
1, the heat recovery system that a kind of pressure-reduction distillation device that can effectively carry out heat recovery, its feature comprise film Distallation systm and the depressurized system that is connected with film one side and the fluid circulation system that is connected with its opposite side, the circulating fluid firing equipment that combines with fluid circulation system, interrelate with depressurized system and fluid circulation system.
2, pressure-reduction distillation device according to claim 1 is characterized in that the film Distallation systm is to be made of single or multiple membrane module groups arranged side by side or series connection, and each membrane module group is made up of the membrane module of single or multiple serial or parallel connections; The core part of membrane module is a porous non-polar high polymer film, the form of polymeric membrane can be hollow-fibre membrane, tubular membrane and flat sheet membrane, and the form of membrane module comprises plate and frame cross-flow membrane modular construction, shell-and-tube membrane module structure, rolled membrane module structure, wound form membrane module structure.
3, pressure-reduction distillation device according to claim 1, it is characterized in that fluid circulation system mainly comprises pump, pipe-line system, control valve, device for storing liquid, sedimentation and filtration equipment, and the test instrumentation and the control system of the flow that interrelates therewith, temperature, pressure, concentration parameter.
4, pressure-reduction distillation device according to claim 1, it is characterized in that depressurized system is used to keep the negative pressure of system, mainly comprise vavuum pump, buffer unit, pipeline, aqua storage tank, and the test instrumentation and the control system of associated pressure, temperature, flow, concentration parameter; Use in heating system under the condition of high-temperature steam heating, this device also can comprise one or one group of steam jet heat pump and steam-water seperator.
5, pressure-reduction distillation device according to claim 1, it is characterized in that heat recovery system is made up of a plurality of heat exchangers, wherein the heat exchanger that links to each other with each membrane module or membrane module group is the vapour-liquid heat exchanger, except that with the last first order comprise the penultimate stage membrane module or heat exchanger that the membrane module group links to each other, the heat exchanger tandem compound that other links to each other with membrane module or membrane module group; The low-temperature material liquid that flows out in afterbody membrane module or the membrane module group enters the heat exchangers in series sequence with opposite direction and carry out heat exchange with the water vapour of extracting out in membrane module; Other heat exchanger is connected with final stage membrane module or membrane module group, relief liquor and high-temperature condensation water respectively.
6, pressure-reduction distillation device according to claim 1 is characterized in that the circulating fluid firing equipment comprises the various heaters that the circulation feed liquid can be heated to 50 ℃ to 100 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201000273U CN201139961Y (en) | 2007-10-22 | 2007-10-22 | Energy-saving pressure reduction film distillation equipment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201000273U CN201139961Y (en) | 2007-10-22 | 2007-10-22 | Energy-saving pressure reduction film distillation equipment |
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| CN201139961Y true CN201139961Y (en) | 2008-10-29 |
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| CNU2007201000273U Expired - Lifetime CN201139961Y (en) | 2007-10-22 | 2007-10-22 | Energy-saving pressure reduction film distillation equipment |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101417209B (en) * | 2007-10-22 | 2011-08-31 | 天津海之凰科技有限公司 | Energy-saving pressure-reduction distillation device and method |
| CN103482714A (en) * | 2013-09-04 | 2014-01-01 | 南京中电环保工程有限公司 | Method and device for desalinating sea water by jet flow-heating process |
| CN104445780A (en) * | 2014-11-30 | 2015-03-25 | 武汉尚远环保股份有限公司 | Method and equipment for treating and recycling high-concentration complex wastewater through nanometer membrane distillation |
| CN106219855A (en) * | 2016-09-06 | 2016-12-14 | 大唐环境产业集团股份有限公司 | Direct Air-cooled Unit recuperation of heat and water treatment facilities and recuperation of heat and method for treating water |
| CN106241924A (en) * | 2016-09-06 | 2016-12-21 | 大唐环境产业集团股份有限公司 | A kind of power plant's desalinization processing means and method |
-
2007
- 2007-10-22 CN CNU2007201000273U patent/CN201139961Y/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101417209B (en) * | 2007-10-22 | 2011-08-31 | 天津海之凰科技有限公司 | Energy-saving pressure-reduction distillation device and method |
| CN103482714A (en) * | 2013-09-04 | 2014-01-01 | 南京中电环保工程有限公司 | Method and device for desalinating sea water by jet flow-heating process |
| CN103482714B (en) * | 2013-09-04 | 2015-03-25 | 南京中电环保工程有限公司 | Method and device for desalinating sea water by jet flow-heating process |
| CN104445780A (en) * | 2014-11-30 | 2015-03-25 | 武汉尚远环保股份有限公司 | Method and equipment for treating and recycling high-concentration complex wastewater through nanometer membrane distillation |
| CN106219855A (en) * | 2016-09-06 | 2016-12-14 | 大唐环境产业集团股份有限公司 | Direct Air-cooled Unit recuperation of heat and water treatment facilities and recuperation of heat and method for treating water |
| CN106241924A (en) * | 2016-09-06 | 2016-12-21 | 大唐环境产业集团股份有限公司 | A kind of power plant's desalinization processing means and method |
| CN106241924B (en) * | 2016-09-06 | 2018-05-04 | 大唐环境产业集团股份有限公司 | A kind of power plant's sea water desalination processing unit and method |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20081029 |