CN109012200A - A kind of multistage membrane module of integrated thermoelectric heat pump and its application in membrane distillation - Google Patents
A kind of multistage membrane module of integrated thermoelectric heat pump and its application in membrane distillation Download PDFInfo
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- CN109012200A CN109012200A CN201811104952.2A CN201811104952A CN109012200A CN 109012200 A CN109012200 A CN 109012200A CN 201811104952 A CN201811104952 A CN 201811104952A CN 109012200 A CN109012200 A CN 109012200A
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Classifications
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- 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
-
- 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
- B01D61/366—Apparatus therefor
-
- 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
- B01D61/368—Accessories; Auxiliary operations
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2311/00—Details relating to membrane separation process operations and control
- B01D2311/10—Temperature control
- B01D2311/103—Heating
- B01D2311/1031—Heat integration, heat recovery or reuse within an apparatus
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2311/00—Details relating to membrane separation process operations and control
- B01D2311/10—Temperature control
- B01D2311/106—Cooling
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2313/00—Details relating to membrane modules or apparatus
- B01D2313/22—Cooling or heating elements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2313/00—Details relating to membrane modules or apparatus
- B01D2313/22—Cooling or heating elements
- B01D2313/221—Heat exchangers
Abstract
The invention discloses a kind of multistage membrane module of integrated thermoelectric heat pump and its applications in membrane distillation.The multistage membrane module of integrated thermoelectric heat pump is mainly made of environment heat absorbing units, function of environment heat emission unit and multistage membrane module；Heat transfer film separation unit in situ includes dewatering microporous film, hot side cavity, cold side cavity and fluid access way；Hot side cavity and cold side cavity are respectively equipped in dewatering microporous film two sides；A block semiconductor heat pump components are equipped between adjacent two-stage membrane module, the heat-absorbent surface of semiconductor heat pump assembly is attached on the cold side cavity of upper level membrane module, and the radiating surface of semiconductor heat pump assembly is attached on the hot side cavity of next stage membrane module；The distance of the radiating surface or heat-absorbent surface of semiconductor heat pump assembly to dewatering microporous film is 1~5 millimeter.The present invention is by the directly heat needed for the transmitting separation of the region of adjacent membrane and improves UF membrane efficiency, reduces energy consumption and cost using membrane distillation method in evaporating concentration processes such as sea water desalination, sewage treatment and food concentrations.
Description
Technical field
The present invention relates to a kind of film distillation technologies, a kind of multistage membrane module more particularly to integrated thermoelectric heat pump and
Application in membrane distillation, multistage membrane module are and to be integrated in the Multistage Membranes of membrane modules at different levels using semiconductor chilling plate as heat pump
Separative unit；Belong to technical field of energy saving and environmental protection.
Background technique
Membrane distillation (membrane distillation, MD) is seeped with microporous hydrophobic membrane two sides steam pressure difference driving steam
Saturating energy saving membrane separation technique is widely used in the fields such as sea water desalination, sewage treatment and food concentration.It is different from traditional thermal method
Evaporating concentrating method (such as multiple-effect evaporation, multistage flash distillation) and other membrane separation techniques (such as reverse osmosis, nanofiltration, electrodialysis),
MD can under relatively mild operating condition (absolute pressure 101kPa, temperature be lower than 80 DEG C) to obtain pure penetrating fluid (pure
Water) feed liquid is concentrated into saturation state simultaneously, it is concentrated in mineral salt recycling, high salinity Industrial Wastewater Treatment, fruit juice and dairy produce
Equal fields show huge application prospect, and by the extensive concern of industrial circle, publication relevant to MD technology has been at present
Surpass 1300.
According to the Trapping ways of per-meate side, MD generally can be divided into direct contact type (direct contact MD, DCMD),
GAP TYPE (air gap MD, AGMD), gas sweeping type (sweeping gas MD, SGMD) and vacuum type (vacuum MD,
VMD).Relative to other MD methods, DCMD becomes the MD process most studied extensively because process configuration is the simplest.
Typical DCMD system had not only needed to heat feed liquid needs cooling penetrating fluid again, thus system operation and meanwhile need heat source with
Cold-trap driving.Heat source needed for heating passes through generally using the residual heat resources (such as Low Temperature Steam, hot water) in process industrial
Enter the hot side of membrane module after external heat-exchange apparatus heating feed liquid；And penetrating fluid enters the cold of membrane module after cold-trap cools down
Side.Since feed liquid is in membrane module hot side evaporation heat transfer and radiation loss, the hot side temperature of membrane module will be along feed solution flow direction
It reduces, and cold-side temperature will be increased along penetrating fluid flow direction, the temperature difference for having thereby resulted in film surface two sides is unevenly distributed, film
Face mean temperature difference (i.e. effective motive force of UF membrane) be less than the cold and hot two sides logistics of membrane module the import temperature difference (i.e. procedures system mentions
The motive force of confession).The separation efficiency of DCMD membrane module is lower as a result,；Meanwhile all there is polarization in the cold and hot two sides of membrane module
(i.e. boundary layer phenomenon) makes hot side film surface fluid temperature (F.T.) lower than mainstream, and film cold side surfactant fluid temperature is higher than mainstream.It is this
Inevasible polarization will further decrease the separation efficiency of DCMD membrane module.To improve DCMD separation efficiency, currently
It is average that film surface is mainly improved using the methods of flow disturbance in counter-current operation, raising membrane module two sides fluid flow rate and reinforcing runner
The temperature difference and alleviation polarization.Though however these methods improve UF membrane efficiency but are all added significantly to the dynamic of fluid conveying
Power consumption, it is difficult to be obviously improved the comprehensive energy efficiency of DCMD system.In addition, common cold-trap generally passes through refrigeration and follows in process industrial
Ring is realized, higher including processes, equipment costs such as compression, throttling (or expansion) and heat exchanges.
Since DCMD system needs heat source and cold-trap to drive simultaneously, occurs the MD integrated system using heat pump in recent years.Heat
Pump is the device for conveying thermal energy from low temperature object system to heating target, by realizing that the high efficiency energy of refrigeration and heating turns simultaneously
It changes, the comprehensive energy efficiency of MD system can be obviously improved.
Chinese invention patent application CN105709601A discloses a kind of two effect distillation devices and method using heat pump,
Two effect DCMD membrane modules are integrated in traditional heat pump cycle, realize that per-meate side refrigeration and feed liquid side add simultaneously using heat pump principle
Heat.The similar membrane distillation method using heat pump further include: the DCMD system for integrating heat pump cycle and heat-accumulating process
(CN206652392U), single membrane module is integrated in DCMD system (CN205461826U), the integrated solar of heat pump cycle
Heating improves heat pump membrane distillation system with the DCMD system (CN105749752A) of heat pump cooling and by optimization hollow-fibre membrane
Method (CN106582292A) of the thermal efficiency etc..(including the equipment such as compressor, throttle valve) are recycled relative to using conventional heat pump,
Had using the semiconductor chilling plate of thermoelectric cooling small in size, at low cost, it is easy to accomplish the advantages of the miniaturization of system.Semiconductor
Cooling piece utilizes Peltier effect, makes heat from the heat absorption of low temperature towards the heat release of high temperature by function of current semiconductor element
Face is mobile.Chinese utility model patent CN203155103U discloses a kind of membrane module that multistage AGMD is realized using thermoelectric cooling
And its method using solar purified water.Due in AGMD between per-meate side and huyashi-chuuka (cold chinese-style noodles) there are the air gap, vapor permeable is to cold
The transmitting resistance in solidifying face is larger, therefore the production water efficiency of AGMD is usually less than DCMD, SGMD and VMD [Guan G, Yang X, Wang
R,et al.Journal of Membrane Distillation,2014,464:127‐139]；In addition, every grade of film of this method
Unit needs 3 cavities (hot and cold working medium cavity and air gap), wherein the heat dissipation metal fin in cold working medium cavity containing large area,
This is not only difficult to further reduce membrane module size, also increases material cost；The patented technology needs the additional sun simultaneously
Energy collecting system provides system and runs institute's calorific requirement, this will also increase method implementation cost.
In short, to promote film distillation technology in the application in the fields such as sea water desalination, sewage treatment and food concentration, currently suddenly
It need to solve the problems, such as follows: 1) reduce the system configuration for utilizing method similar to this kind of High Efficiency Thermal of heat pump Integrated Films Distallation systm, cold source
Complexity and cost；2) optimization membrane module designs alleviate polarization and flow field is uneven, improve the energy utilization in membrane module
Efficiency strengthens Mass and heat transfer.
Summary of the invention
It can significantly improve UF membrane efficiency it is an object of that present invention to provide a kind of while reducing using DCMD method cost
The multistage membrane module of integrated thermoelectric heat pump and its application in membrane distillation realize that sea water desalination, sewage treatment and food are dense
The energy consumption and cost of the evaporating concentration processes such as contracting significantly reduce.
The present invention replaces the conventional heat pump circulatory system using semiconductor chilling plate, reduces heat, the system that cold source utilizes method
Configuration complexities and cost；And " in situ to conduct heat " and optimizing flow passage design by conducting heat in film surface adjacent place improve film two sides
Mean temperature difference and alleviation polarization improve separation heat transfer efficiency reducing DCMD system cost simultaneously.Of the invention is " in situ to pass
Heat " is the time space interval by reducing energy transmission, film surface needed for making the energy of input system be more effectively transferred into separation
Hot side, and the heat of film surface cold side also passes through more quickly heat-absorbent surface and removes system.
Semiconductor chilling plate of the present invention utilizes Peltier effect, inhales heat from the low temperature of cooling piece by the function of current
Heat is transmitted towards high temperature exothermic face.Pass through what metal partition absorbed heat from per-meate side air gap using semiconductor chilling plate relative to having
Technical solution, the present invention are significantly higher than the characteristic of gas using liquid thermal conductivity factor, are had by the way of directly cooling penetrating fluid
Effect improves heat conductive efficiency.
Object of the present invention is to be achieved through the following technical solutions:
A kind of multistage membrane module of integrated thermoelectric heat pump, mainly by environment heat absorbing units, function of environment heat emission unit and multistage
Membrane module composition, every grade of membrane module include semiconductor heat pump assembly and heat transfer film separation unit in situ；
The heat transfer film separation unit in situ include dewatering microporous film, hot side cavity, cold side cavity, liquor inlet channel,
Material liquid outlet channel, penetrating fluid intake channel, penetrating fluid exit passageway；Dewatering microporous film two sides be respectively equipped with hot side cavity and
Cold side cavity；Hot side cavity one end is equipped with liquor inlet channel, and the other end is equipped with material liquid outlet channel；One end of cold side cavity is set
There is penetrating fluid intake channel, the other end is equipped with penetrating fluid exit passageway；
A block semiconductor heat pump components are equipped between adjacent two-stage membrane module, the heat-absorbent surface of semiconductor heat pump assembly is attached to one
On the cold side cavity of grade membrane module, the radiating surface of semiconductor heat pump assembly is attached on the hot side cavity of next stage membrane module；In heat
The distance of side cavity, radiating surface to the dewatering microporous film of semiconductor heat pump assembly is 1~5 millimeter；In cold side cavity, semiconductor heat
The distance of the heat-absorbent surface of pump assembly to dewatering microporous film is 1~5 millimeter；Environment heat absorbing units are close to first order membrane module hot side and are held
The heat-absorbent surface of semiconductor heat pump assembly on chamber, the radiating surface and first order membrane module hot side cavity of semiconductor heat pump assembly connect
It connects；Function of environment heat emission unit is close to the radiating surface of the semiconductor heat pump assembly on the cavity of afterbody membrane module cold side, semiconductor heat
The heat-absorbent surface of pump assembly is connect with afterbody membrane module cold side cavity.
To further realize the object of the invention, it is preferable that it is logical to be respectively equipped with multiple liquor inlet at the both ends of hot side cavity
Road and material liquid outlet channel, any liquor inlet channel be not conllinear with the axis in any material liquid outlet channel.
Preferably, the multiple penetrating fluid intake channels of setting are respectively equipped at the both ends of cold side cavity and penetrating fluid outlet is logical
Road, any penetrating fluid intake channel be not conllinear with the axis of any penetrating fluid exit passageway.
Preferably, the environment heat absorbing units use free convection air heat exchanger, and function of environment heat emission unit is using pressure pair
Flow air radiator.
Preferably, the free convection air heat exchanger flows finned refrigerated heat exchanger using nature；The pressure pair
It flows air radiator and uses aluminum fin fan cooler.
Preferably, the semiconductor heat pump assembly all includes installation frame and semiconductor chilling plate, wherein semiconductor refrigerating
Piece selects model TEC1-19006, and having a size of 40x40x4mm, assembly is in heat resistant epoxide resin installation frame.
Preferably, the dewatering microporous film is using the modified ultra-hydrophobic polyvinylidene fluoride planar film in surface, average film thickness
0.018mm。
Application of the multistage membrane module of the integrated thermoelectric heat pump in direct contact membrane distillation system integrates half
The multistage membrane module and accessory of conductor heat pump form direct contact membrane distillation system, the direct contact membrane distillation system master
It to be made of feed liquid storage tank, hot side circulating pump, the multistage membrane module of integrated thermoelectric heat pump, penetrating fluid storage tank, penetrating fluid circulation；
Feed liquid storage tank is connect by pipeline with hot side circulating pump, and hot side circulating pump passes through the pipeline multistage with integrated thermoelectric heat pump respectively
The liquor inlet channel of multiple hot side cavities of membrane module connects, and the multiple hot sides for integrating the multistage membrane module of thermoelectric heat pump are held
The material liquid outlet channel of chamber is connect by pipeline with feed liquid storage tank；Infiltration liquid storage tank is connect by pipeline with penetrating fluid circulating pump,
Penetrating fluid circulating pump by pipeline respectively with the penetrating fluid of multiple cold side cavities of the multistage membrane module of integrated thermoelectric heat pump into
The connection of mouth channel；The penetrating fluid exit passageway of multiple cold side cavities of the multistage membrane module of multiple integrated thermoelectric heat pumps leads to respectively
Piping is connect with infiltration liquid storage tank.
Preferably, seawater, sewage or liquid food to be concentrated is added in the feed liquid storage tank；The feed liquid storage tank is added super
Pure water realizes sea water desalination, sewage treatment or food concentration.
Preferably, the liquid food to be concentrated is milk.
In direct contact membrane distillation system of the present invention, the feed liquid to be concentrated in feed liquid storage tank is pumped past by feed liquid circulation
Hot side cavities at different levels heating in the multistage membrane module of integrated thermoelectric heat pump；Penetrating fluid in infiltration liquid storage tank passes through penetrating fluid
It is cooling that circulating pump is sent to the cold side cavity in the multistage membrane module of integrated thermoelectric heat pump；In the Multistage Membranes of integrated thermoelectric heat pump
In component, under the driving of film two sides fluid temperature (F.T.) difference, penetrating fluid steam passes through film from hot side under the driving of film two sides steam pressure difference
It is migrated to cold side, is achieved in the evaporation and concentration of feed liquid and the condensation enrichment of penetrating fluid.
The heating and cooling procedure of feed liquid of the present invention and penetrating fluid in multistage membrane module are described in detail below: by first
Level semiconductor heat pump components are after environment heat absorbing units absorption heat to the hot side cavity of first order original position heat transfer film separation unit
Heat transfer, heats the feed liquid in hot side cavity；Penetrating fluid in the cavity of cold side is cooling by next stage semiconductor heat pump assembly,
Hot side cavity transmitting of the heat of absorption to next stage original position heat transfer film separation unit；So analogize, semiconductor heat pump groups at different levels
Part holds from the absorb heat hot side of this backward grade heat transfer film separation unit in situ of the cold side cavity of upper level heat transfer film separation unit in situ
Chamber heat release；The cold side cavity heat of afterbody original position heat transfer film separation unit passes through afterbody semiconductor heat pump assembly to ring
The heat transfer of border heat-sink unit, the heating of feed liquid side and the per-meate side for being achieved in heat transfer film separation units in situ at different levels are cooling.
The present invention has the following advantages compared with the prior art and effect:
1) energy transmission needed for tradition DCMD system UF membrane by membrane module outside heater and cooler complete, energy
For giving, there are biggish time space intervals between use.It is a discovery of the invention that controlling the heat dissipation of semiconductor heat pump assembly in hot side cavity
The distance of face to dewatering microporous film is 1~5 millimeter；In cold side cavity, the heat-absorbent surface of semiconductor heat pump assembly is controlled to hydrophobic micro-
The distance of pore membrane is 1~5 millimeter；The setting of adjacent two-stage membrane module interval；The heat-absorbent surface and next stage film group of upper level membrane module
1~5 millimeter of the heat dissipation face interval of part；The spacing of heat-transfer area and film surface should be less than the width of temperature boundary layer, may be implemented " in situ
Heat transfer ", effectively improves DCMD process thermal efficiency.
2) of the invention since energy supply position (i.e. heat-transfer area) and energy use position (i.e. film surface) to be substantial access to, it conducts heat
Apart from very little need not the augmentation of heat transfer measures such as fin be set between heat-transfer area and film surface, thereby dramatically reduce the knot of membrane module
Structure complexity and cost.
3) semiconductor heat pump assembly heat-absorbent surface of the present invention is directly contacted with penetrating fluid, avoid passing through air gap pass it is thermogenetic compared with
High heat transfer resistance improves the cold two sides effective temperature difference of film surface fluid thermal.
4) heat-absorbent surface and radiating surface of semiconductor heat pump assembly of the present invention all pass through adjacent semiconductor heat pump assembly respectively
Radiating surface and heat-absorbent surface carry out heat exchange, the space length for shortening energy supply and using, both avoided from external hot hand over
Energy loss caused by two to membrane module and from membrane module entrance to film surface fluid conveying links of exchange device, and slow down pole
The influence of change effect.
5) the economic semiconductor chilling plate of present invention application replaces traditional heat pump cycle can be with lower cost easily
Develop multistage DCMD system.Relative to existing method (such as patent CN 203155103U), film separation units at different levels only have it is cold,
Two thickness of hot side are no more than 5mm cavity, and thus can both effectively reduce film group without inner members such as metal fins in cavity
Part size can manufacture film units at different levels using light materials such as plastics completely again, realize the compactedness and lightweight of DCMD system,
Significantly reduce MD system configuration cost.
6) present invention effectively prevents " dead zone " in the case where not dramatically increasing flowing energy consumption by the optimization to two side runner of film
" short circuit " phenomenon, further increases the separation efficiency of membrane module.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the multistage membrane module of the integrated thermoelectric heat pump of the present invention；
Fig. 2 is the structural schematic diagram of heat transfer film separation unit in situ and the combination of semiconductor heat pump assembly；
Fig. 3 is the membrane distillation system structure diagram established using the multistage membrane module of the integrated thermoelectric heat pump of the present invention；
Fig. 4 is the structural schematic diagram of traditional two-stage parallel connection DCMD system and film separation unit at different levels in comparative example 1,2 and 3；
Fig. 5 is the two-stage membrane module structure schematic diagram that thermoelectric heat pump is integrated described in embodiment 1,2 and 3；
Fig. 6 is embodiment 1,2 and the membrane distillation system structure signal that 3 application integration thermoelectric heat pump second membrane modules are established
Figure；
Fig. 7 changes over time curve for the concentration speed of comparative example 1 and embodiment 1；
Fig. 8 is the sewage load versus time curve of comparative example 2 and embodiment 2；
Fig. 9 is the concentration speed versus time curve of comparative example 3 and embodiment 3.
Specific embodiment
For a better understanding of the invention, the invention will be further described with reference to the accompanying drawings and examples, but this hair
Bright embodiment is without being limited thereto.
As shown in Figure 1, a kind of multistage membrane module of integrated thermoelectric heat pump, by environment heat absorbing units 11, function of environment heat emission list
Member 12 and multistage membrane module composition.
Multistage membrane module includes multiple heat transfer film separation units 14, Mei Geyuan in situ separated by semiconductor heat pump assembly 13
Position heat transfer 14 structure of film separation unit is as shown in Figure 2.Heat transfer film separation unit 14 in situ includes dewatering microporous film 21, hot side cavity
25, cold side cavity 29, liquor inlet channel 22, material liquid outlet channel 26, penetrating fluid intake channel 23, penetrating fluid exit passageway
27。
Hot side cavity 25 and cold side cavity 29 are respectively equipped in 21 two sides of dewatering microporous film；25 one end of hot side cavity is equipped with material
Liquid intake channel 22, the other end are equipped with material liquid outlet channel 26；One end of cold side cavity 29 is equipped with penetrating fluid intake channel 23, separately
One end is equipped with penetrating fluid exit passageway 27；One block semiconductor heat pump components 13, thermoelectric heat pump are set between adjacent two-stage membrane module
The heat-absorbent surface of component 13 is close to the cold side cavity 29 of upper level membrane module, and the radiating surface of semiconductor heat pump assembly 13 is close to next stage
The hot side cavity 25 of membrane module；In hot side cavity 25, the radiating surface 24 of semiconductor heat pump assembly arrives the distance of dewatering microporous film 21
It is 1~5 millimeter；The cavity 29 in cold side, the distance of heat-absorbent surface 28 to the dewatering microporous film 21 of semiconductor heat pump assembly are 1~5 milli
Rice；Environment heat absorbing units 11 are close to the heat-absorbent surface of the semiconductor heat pump assembly 13 on first order membrane module hot side cavity, semiconductor
The radiating surface of heat pump components 13 is connect with first order membrane module hot side cavity 25；Function of environment heat emission unit 12 is close to afterbody film group
The radiating surface of semiconductor heat pump assembly 13 on the cavity of part cold side, the heat-absorbent surface and afterbody film group of semiconductor heat pump assembly 13
Part cold side cavity 19 connects.
For the heat transfer for improving feed liquid heating and penetrating fluid cooling, the present invention is using directly in the " former of film close position heat transfer
Position heat transfer ", the i.e. distance of the radiating surface 24 and heat-absorbent surface 28 of semiconductor heat pump assembly 13 to dewatering microporous film 21 respectively all for 1~
5 millimeters, make to be heated with cooling fluid directly with radiating surface and heat absorption face contact, and by reduce energy conveying and conversion when
Ullage from, not only improved the mean temperature difference of 21 two sides of dewatering microporous film but also alleviated polarization, so as to improve heat transfer and separative efficiency.
Free convection air heat exchanger can be used in environment heat absorbing units of the present invention, and forced convertion can be used in function of environment heat emission unit
Air radiator.Free convection air heat exchanger preferably uses nature to flow finned refrigerated heat exchanger, fin having a size of
60x10x1.5mm.Forced Convection Air radiator uses aluminum fin fan cooler, and radiator fan carries standard 5V power supply pipe
Function is managed, maximum heat radiation power is 360W.
Semiconductor heat pump assembly 13 all includes installation frame and semiconductor chilling plate, and wherein semiconductor chilling plate selects model
For TEC1-19006, having a size of 40x40x4mm, assembly is in heat resistant epoxide resin installation frame.Semiconductor heat pump assembly 13 utilizes
Pyroelectric effect (Peltier effect) transmits heat from the heat-absorbent surface 28 of low temperature to the radiating surface 24 of high temperature.
It is influenced to slow down " dead zone " and " short circuit " caused by when logistics passes in and out cavity, realizes improving cavity, as shown in Fig. 2,
Preferably, multiple liquor inlet channels 22 and material liquid outlet channel 26, any feed liquid are respectively equipped at the both ends of hot side cavity 25
Intake channel 22 is not conllinear with the axis in any material liquid outlet channel 26；In cold side, it is multiple to be respectively equipped with setting for the both ends of cavity 29
Penetrating fluid intake channel 23 and penetrating fluid exit passageway 27, any penetrating fluid intake channel 23 and any penetrating fluid exit passageway 27
Axis it is not conllinear.
When a kind of Multistage Membranes assembly operating of integrated thermoelectric heat pump of the present invention, feed liquid is entered by liquor inlet channel 22
Hot side cavity 25 passes through 13 heat temperature raising of semiconductor heat pump assembly；Penetrating fluid enters cold side by penetrating fluid intake channel 23 and holds
Chamber 29 passes through 13 absorbing and cooling temperature of semiconductor heat pump assembly.Poor in 21 two sides formation temperature of dewatering microporous film, i.e., the water of feed liquid side steams
Vapour pressure is higher than per-meate side, and the vapor in fenestra migrates under steam pressure difference promotion from feed liquid side to per-meate side, is achieved in material
The evaporation and concentration of liquid side simultaneously makes water in infiltration lateral enrichment.
As shown in figure 3, the multistage membrane module of application integration thermoelectric heat pump, makes the multistage membrane module of integrated thermoelectric heat pump
Heat transfer film separation units in situ at different levels in hot side cavity it is in parallel, parallel connected end connects with feed liquid storage tank and hot side circulating pump respectively
It connects, feed liquid storage tank is connected with hot side circulating pump by pipeline；Make the originals at different levels of the multistage membrane module of integrated thermoelectric heat pump simultaneously
Cold side cavity in position heat transfer film separation unit is in parallel, and parallel connected end is connect with infiltration liquid storage tank and penetrating fluid circulating pump respectively, is seeped
Transparent liquid storage tank is connected with penetrating fluid circulating pump by pipeline；Form economic, efficient, new DCMD system.The new DCMD system
System is mainly by feed liquid storage tank 31, hot side circulating pump 32, the multistage membrane module 33 of integrated thermoelectric heat pump, penetrating fluid storage tank 34, infiltration
Transparent liquid circulating pump 35；Feed liquid storage tank 31 is connect by pipeline with hot side circulating pump 32, hot side circulating pump 32 pass through pipeline respectively with
The liquor inlet channel connection of multiple hot side cavities of the multistage membrane module 33 of integrated thermoelectric heat pump, integrates thermoelectric heat pump
The material liquid outlet channel of multiple hot side cavities of multistage membrane module 33 is connect by pipeline with feed liquid storage tank 31；Permeate liquid storage tank 34
It is connect by pipeline with penetrating fluid circulating pump 35, penetrating fluid circulating pump 35 passes through the pipeline multistage with integrated thermoelectric heat pump respectively
The penetrating fluid intake channel of multiple cold side cavities of membrane module 33 connects；The multistage membrane module 33 of multiple integrated thermoelectric heat pumps
The penetrating fluid exit passageway of multiple cold side cavities passes through pipeline respectively and connect with infiltration liquid storage tank 34.
In use, prepared feed liquid will be integrated in advance as feed liquid storage tank 31, feed liquid by 32 input of feed liquid circulation pump
The hot side cavity of film separation unit at different levels in the multistage membrane module 33 of thermoelectric heat pump, feed liquids at different levels pass through the level semiconductor heat pump
Component heat temperature raising；The penetrating fluid permeated in liquid storage tank 34 inputs the multistage of integrated thermoelectric heat pump by penetrating fluid circulating pump 35
The cold side cavity of film separation unit at different levels in membrane module 33, penetrating fluid in heat transfer film separation units in situ at different levels by with cold side
The semiconductor heat pump assembly of cavity connection cools；Volatility group under the driving of dewatering microporous film temperature difference, in feed liquid
Divide evaporating-osmosis to condense by dewatering microporous film and in per-meate side, realizes the concentration of feed liquid and the output of penetrating fluid.
Comparative example 1
After in traditional DCMD system, feed liquid is heated up by external heater, and penetrating fluid is cooled down by external cooler
Flow into membrane module.In membrane module along with from heat transfer from hot side to cold side and mass transfer, the feed liquid temperature in hot side cavity reduce,
And the penetrating fluid temperature in the cavity of cold side increases, it reduce the temperature differences of DCMD film two sides.In addition existing pole near film surface
Change acts on the effective temperature difference that further reduced DCMD film two sides, therefore the separation efficiency of tradition DCMD is lower.Preferably to say
The difference of the bright present invention and tradition DCMD, establish traditional two-stage parallel connection DCMD system as shown in Figure 4.
As shown in figure 4, tradition DCMD system specifically includes, volume is 500mL, material is polyacrylic feed liquid storage tank 41, beauty
The feed liquid circulation of Cole-Parmer company of state Masterflex L/S type pumps 42,2kW electric heating system 43, DCMD two-stage parallel connection
Membrane module 44, volume 500mL, material are the infiltration liquid storage tank 45 of polypropylene tape overflow outlet, Cole-Parmer company of the U.S.
The low temperature of the penetrating fluid circulating pump 46 of Masterflex L/S type, Cole-Parmer company of U.S. Polystat12122-58 type
Circulator bath 47, the computer 48 of data acquisition and monitoring and the assay balance 49 for penetrating fluid overflow measurement.Wherein,
Traditional DCMD two-stage parallel connection membrane module 44 includes the first order tradition DCMD film separation unit 441 being arranged in parallel and second level tradition
DCMD film separation unit 442.Two-stage tradition DCMD film separation unit structure having the same, using colorless and transparent organic glass
It is made, (structure is primarily to just for the hot side cavity 4411 and cold side cavity 4412 for being 40x40x5mm including size
In more convenient with the present invention, there is no 5mm to want for width of traditional DCMD system to hot side cavity 4411 and cold side cavity 4412
Ask, be generally all much larger than the width, below comparative example 2 and comparative example 3 be also that same volume considers)；Dewatering microporous film 4413 is adopted
The modified ultra-hydrophobic polyvinylidene fluoride planar film in surface provided with Singapore's membrane technology center, effective dimensions 40x40mm are put down
Equal film thickness is 0.018mm；Cold and hot two sides cavity is designed with fluid outlet channels 4414 and fluid inlet channel 4415.
The desalting that sodium-chloride water solution is carried out using traditional two-stage parallel connection DCMD system shown in Fig. 4, by sodium chloride
Aqueous solution is concentrated into saturation while obtaining pure water, and concrete operation method and procedure parameter are as follows:
Preparatory prepared 3% sodium-chloride water solution is placed in feed liquid storage tank 41, feed liquid is sent by feed liquid circulation pump 42
The hot side cavities 4411 at different levels of two-stage parallel connection membrane module 44 are inputted after electric heating system 43；It is placed in the ultrapure water of infiltration liquid storage tank 45
It is sent to low-temperature circulating water-bath 47 by penetrating fluid circulating pump 46, each of two-stage parallel connection membrane module 44 is inputted after coil heat exchange cools down
Grade cold side cavity 4412.The flow for setting feed liquid and penetrating fluid circulating pump is all 120mL/min, adjusts electric heater 43 and low temperature
Circulator bath 47 makes 57~59 DEG C of hot side cavity feeding temperature at different levels of two-stage parallel connection DCMD membrane module 44, and cold side cavity
Penetrating fluid inlet temperature is 20~21 DEG C.The out temperature of membrane module passes through 48 acquisition and recording of computer.In biographies in situ at different levels
In hotting mask separative unit, the inlet temperature differential of hot and cold sides cavity is about 38 DEG C, is driven in the steam pressure difference of hot and cold sides
Under, feed liquid evaporates in the film surface of hot side cavity and to cold side heat transfer and mass transfer, thus increases penetrating fluid, generated infiltration
Liquid is flowed out by the overflow pipe of infiltration liquid storage tank 45, and passes through the yield of 49 measurement unit time of balance penetrating fluid.
Under the conditions of aforesaid operations, the brine concentration rate of DCMD system is the penetrating fluid yield of unit time, at any time
Between change curve it is as shown in Figure 7.The result shows that: sodium-chloride water solution can be concentrated and realize that the desalination of salt water is light by membrane distillation system
Change, about per hour 18 grams of concentration speed of traditional DCMD system salt water at the beginning, as concentration carries out the salinity of feed liquid
It is continuously improved, 20 hours afterchlorinate sodium water solutions of continuous operation are reduced close to saturation, concentrating capacity because the concentration of feed liquid increases
To 13 grams per hour.
Comparative example 2
Certain steel plant's brine waste is handled using tradition DCMD system (as shown in Figure 4) identical with comparative example 1.
The total soluble-salt TDS content of waste water is about 100g/L, with Mg2+、Fe3+And SO4 2‐Based on plasma.
Sample waste water is placed in feed liquid storage tank 41, feed liquid is sent into after electric heating system 43 to input and be passed by feed liquid circulation pump 42
The hot side cavities at different levels of system two-stage parallel connection membrane module 44；The ultrapure water for being placed in infiltration liquid storage tank 45 is sent by penetrating fluid circulating pump 46
Toward low-temperature circulating water-bath 47, the cold side cavities at different levels of two-stage parallel connection membrane module 44 are inputted after coil heat exchange cools down.Set feed liquid
Flow with penetrating fluid circulating pump is all 100mL/min respectively, and adjusting electric heater 43 and low-temperature circulating water-bath 47 makes two-stage simultaneously
The hot side cavity feeding temperatures at different levels for joining tradition DCMD membrane module 44 are 54~55 DEG C, and the penetrating fluid inlet temperature of cold side cavity
It is 20~21 DEG C.The out temperature of membrane module passes through 48 acquisition and recording of computer.In traditional DCMD film separation unit, hot side
Inlet temperature differential with cold side cavity is about 34 DEG C, and under the steam pressure difference driving of hot and cold sides, feed liquid is in hot side cavity
Film surface evaporates and to cold side heat transfer and mass transfer, thus increases penetrating fluid, and generated penetrating fluid passes through infiltration liquid storage tank 45
Overflow pipe outflow, and pass through the yield of 49 measurement unit time of balance penetrating fluid.
Under the conditions of aforesaid operations, the wastewater treatment capacity of DCMD system is the penetrating fluid yield of unit time, at any time
Change curve it is as shown in Figure 8.For system described in comparative example 2, use membrane area for 32cm2Traditional DCMD system it is small 2
When continuous service in, about per hour 14~15 grams of wastewater treatment capacity.
Comparative example 3
Using tradition DCMD system (as shown in Figure 4) Evamilk identical with comparative example 1, make in milk protein content from
5% improves to 10%.
Sample milk is placed in feed liquid storage tank 41, feed liquid is sent into after electric heating system 43 to input and be passed by feed liquid circulation pump 42
The hot side cavities at different levels of system two-stage parallel connection membrane module 44；The ultrapure water for being placed in infiltration liquid storage tank 45 is sent by penetrating fluid circulating pump 46
Toward low-temperature circulating water-bath 47, the cold side cavities at different levels of two-stage parallel connection membrane module 44 are inputted after coil heat exchange cools down.Set feed liquid
Flow with penetrating fluid circulating pump is all 100mL/min respectively, and adjusting electric heater 43 and low-temperature circulating water-bath 47 makes two-stage simultaneously
The hot side cavity feeding temperatures at different levels for joining DCMD membrane module 44 are 55~56 DEG C, and the penetrating fluid inlet temperature of cold side cavity is 20
~21 DEG C.The out temperature of membrane module passes through 48 acquisition and recording of computer.In traditional DCMD film separation unit, hot side and cold
The inlet temperature differential of side cavity is about 35 DEG C, under the steam pressure difference driving of hot and cold sides, film table of the feed liquid in hot side cavity
Face evaporates and to cold side heat transfer and mass transfer, thus increases penetrating fluid, and generated penetrating fluid is overflow by infiltration liquid storage tank 45
Flow tube outflow, and pass through the yield of 49 measurement unit time of balance penetrating fluid.
Under the conditions of aforesaid operations, the milk concentration speed of DCMD system is the penetrating fluid yield of unit time, at any time
Between change curve it is as shown in Figure 9.For using membrane area for 32cm described in comparative example 32Traditional DCMD system, it is small by 6
When continuous service, about per hour 13~14 grams of milk concentration speed.
Embodiment 1
The two-stage membrane module of integrated thermoelectric heat pump as shown in Figure 5 is established by Fig. 1-Fig. 3 structure, wherein integrated semiconductor heat
The two-stage membrane module 50 of pump includes: environment heat absorbing units 51, first order semiconductor heat pump assembly 52, first order original position heat-transfer film point
From unit 53, second level semiconductor heat pump assembly 54, the heat transfer of the second level original position film separation unit 55, third level semiconductor heat pump group
Part 56 and function of environment heat emission unit 57.Wherein, environment heat absorbing units 51 flow finned refrigerated heat exchanger, fin using aluminum naturally
Having a size of 60x10x1.5mm.
First order semiconductor heat pump assembly 52, second level semiconductor heat pump assembly 54 and third level semiconductor heat pump assembly 56
Structure having the same all includes installation frame and semiconductor chilling plate, and wherein semiconductor chilling plate selects model TEC1-
19006, having a size of 40x40x4mm, assembly is in heat resistant epoxide resin installation frame.
First order original position heat transfer film separation unit 53 and the second level original position heat transfer structure having the same of film separation unit 54,
Be all made of organic glass production, wherein the size of hot side cavity and cold side cavity is 40x40x5mm, dischargeable capacity be 8mL (for
Convenient for comparison, the size of membrane module at different levels is as described in comparative example 1 identical in embodiment 1).
To improve flowing " dead zone " and " short circuit " problem when fluid passes in and out cavity, hot side cavity charging side is uniformly distributed
10 diameter function of environment heat emission units 57 use aluminum fin fan coolers, and radiator fan carries standard 5V power management function
Can, maximum heat radiation power is 360W.For the feeding-passage of 1.8mm, it is going out for 1.8mm that the side that discharges, which has been uniformly distributed 9 diameters,
Expect channel, and any intake channel is not overlapped with the axis of exit passageway；Cold side cavity charging side has been uniformly distributed 9 directly
Diameter is the feeding-passage of 1.8mm, and discharging side has been uniformly distributed the tapping channel that 10 diameters are 1.8mm, and any import is logical
Road is not overlapped with the axis of exit passageway；Preferably to monitor UF membrane state, the heat of heat transfer film separation units in situ at different levels
The PT100 thermal resistance temperature sensor connecting with computer acquisition system is designed in side cavity and cold side cavity；Hydrophobic microporous
The surface that film uses Thermo to provide is modified ultra-hydrophobic polyvinylidene fluoride planar film (product number 88518), after cutting effectively
Having a size of 40x40mm, average film thickness 0.018mm.
With the application of the invention, sodium chloride brine desalination is carried out by process development as shown in Figure 3 DCMD system as shown in FIG. 6,
Process purpose and comparative example 1 are consistent, i.e., concentration salting liquid to saturation while obtaining pure water.
As shown in fig. 6, DCMD system specifically includes, a volume is 500mL, material is polyacrylic feed liquid storage tank 61, one
Cover Masterflex L/S moulding mixture liquid circulating pump 62, a set of semiconductor heat integrated as shown in Figure 4 of U.S. Cole-Parmer company
Two-stage membrane module 63 (specific structure is as shown in Figure 5), the volume of pump are 500mL, material is what polypropylene tape overflow exported
Permeate liquid storage tank 64, a set of U.S. Cole-Parmer company Masterflex L/S type penetrating fluid circulating pump 65；Additionally
Including three rated power be 300W adjustable power of direct current 66, a sets of data acquisition and monitoring computer 67 and one with
In the assay balance 68 of penetrating fluid overflow measurement, the assay balance 68 and infiltration liquid storage tank 64 of penetrating fluid overflow measurement connect
It connects.The present embodiment 1DCMD system is in relation to connection type referring to the explanation of Fig. 3, and only the label of component is according to specific embodiment
It is modified.
The concrete operation method and procedure parameter of the DCMD system are as follows:
Preparatory prepared 3% sodium-chloride water solution and ultrapure water are respectively placed in feed liquid storage tank 61 and infiltration liquid storage tank
64, feed liquid and ultrapure water pass through the hot side that hot side circulating pump 62 and cold side circulating pump 65 are inputted respectively in two-stage membrane module 63 respectively
With cold side cavity.The output voltage for setting thermoelectric heat pump Component driver DC power supplies at different levels is constant for 24V, adjusting hot side circulation
The flow of pump 62 and cold side circulating pump 65, makes the feed liquid temperature in hot side cavity stabilize to 57 DEG C, the ultrapure water in the cavity of cold side
Temperature is about 20 DEG C.The hot and cold side vessel temp of heat transfer film separation units in situ at different levels (is calculated by 67 acquisition and recording of computer
Machine temperature collecting module is connect with the thermal resistances at different levels of two-stage membrane module), operation maintains hot side cavity mean temperature to hold than cold side
Chamber is 37 DEG C high.Under the steam pressure difference driving of hot and cold sides, feed liquid is evaporated in the film surface of hot side cavity and is conducted heat to cold side
And mass transfer, thus increase penetrating fluid, generated penetrating fluid is flowed out by the overflow pipe of infiltration liquid storage tank 64, and passes through balance
The penetrating fluid yield of 68 measurement unit times.
Under the conditions of aforesaid operations, the brine concentration rate of DCMD system is the penetrating fluid yield of unit time, at any time
Between change curve it is as shown in Figure 7.The result shows that: the two-stage membrane distillation system of integrated thermoelectric heat pump can be by sodium-chloride water solution
Concentration realizes that the desalting of salt water uses membrane area for 32cm system described in embodiment 12Membranous system it is initial when salt
About per hour 25 grams of the concentration speed of water, as the salinity that concentration carries out feed liquid is continuously improved, after continuous operation 20 hours
Sodium-chloride water solution is reduced to 18 grams of water per hour because the concentration of feed liquid increases close to saturation, concentrating capacity.Pass through embodiment 1
Illustrate the Multistage Membranes Distallation systm energy long period stable operation of integrated thermoelectric heat pump, while realizing that sodium-chloride water solution is concentrated
With the production of pure water, the method for the present invention has been indicated above it and has been expected to be applied to the fields such as mineral salt recycling and sea water desalination.
Relative to conventional film Distallation systm described in comparative example 1, the present invention has higher UF membrane efficiency.For identical
Membrane material and membrane area, under the same operating conditions the sodium chloride solution of embodiment 1 as shown in Figure 7 concentrating capacity compare
Ratio 1 is improved more than 1/3.This is because the two-stage membrane module (as shown in Figure 5) for integrating thermoelectric heat pump described in embodiment 1 is answered
With " heat transfer in situ " method and runner design scheme is optimized, thus effectively improves Mass and heat transfer efficiency.
Comparison diagram 6 and Fig. 4 two systems, since (as shown in Figure 6) of the invention is cooling by feed liquid heating system and penetrating fluid
In integrated multistage membrane module, system configuration only needs two storage tanks and two circulating pumps, greatly reduces for the system integration
System implement needed for space requirement；Importantly, the present invention uses an economy, compact semiconductor heat pump assembly generation
For heater and cooler two systems, the integrated of the hot and cold energy is realized using heat pump process, effectively improves the comprehensive energy of system
Source utilization rate.Relative to the membrane distillation system of existing integrated thermoelectric heat pump, such as Chinese invention patent application
CN105709601A, CN206652392U, CN205461826U, CN105749752A, CN106582292A and
CN203155103U etc.), multistage membrane module of the invention (as shown in Figure 1, Figure 2 and Fig. 5 shown in) and the membrane distillation system thus established
(as shown in Figure 3 and Figure 6) had not only avoided using components such as compressor required in conventional heat pump method and hot and cold heat exchangers, but also
Avoid effectively reducing mould packet size using complicated film group inner member, thereby dramatically reduce system configuration complexity and
Cost is applied to actual industrial field convenient for system amplification.
Embodiment 2
Using DCMD system processing same as Example 1 and certain identical steel plant's brine waste described in comparative example 2.
Using operating method similar to Example 1, brine waste and ultrapure water are respectively placed in feed liquid storage tank 61 and seeped
Transparent liquid storage tank 64, feed liquid (brine waste) and ultrapure water pass through hot side circulating pump 62 respectively and cold side circulating pump 65 inputs two respectively
Hot and cold sides cavity in grade membrane module 63.The output voltage for setting thermoelectric heat pump Component driver DC power supplies at different levels is constant
For 24V, the flow of hot side circulating pump 62 and cold side circulating pump 65 is adjusted, makes to enter described in heat, cold side cavity temperature and comparative example 2
The feed liquid of membrane module is identical with penetrating fluid temperature, and hot side cavity temperature is 54~55 DEG C, cold side cavity temperature is 20~21 DEG C.
By 67 acquisition and recording of computer, (computer temperature acquires mould to the hot and cold side vessel temp of heat transfer film separation units in situ at different levels
Block is connect with the thermal resistances at different levels of two-stage membrane module), operation maintains hot side cavity mean temperature 34 DEG C higher than cold side cavity.In heat
Under the driving of the steam pressure difference of side and cold side, feed liquid evaporates in the film surface of hot side cavity and to cold side heat transfer and mass transfer, thus makes
Penetrating fluid increases, when generated penetrating fluid is by permeating the overflow pipe outflow of liquid storage tank 64, and passing through 68 measurement unit of balance
Between penetrating fluid yield.
Under the conditions of aforesaid operations, the wastewater treatment capacity of DCMD system is the penetrating fluid yield of unit time, at any time
Change curve it is as shown in Figure 8.The result shows that: the two-stage membrane distillation system of integrated heat pump can steadily handle brine waste, right
The system described in embodiment 2, uses membrane area for 32cm22 hours wastewater treatment capacities of membranous system continuous operation stabilize to 19
~20 Grams Per Hours have been indicated above the method for the present invention and have been expected to be applied to the fields such as brine waste processing.
Relative to conventional film Distallation systm described in comparative example 2, the present invention has higher UF membrane efficiency.Such as Fig. 8 institute
Show, membrane module membrane area having the same described in embodiment 2 and comparative example 2, saliferous is useless under conditions of same feedstock temperature
The processing capacity of water is increased more than 40%, this is because the two-stage membrane module (as shown in Figure 5) of integrated heat pump described in embodiment 1
It applies " heat transfer in situ " method and optimizes runner design scheme, thus effectively improve the Mass and heat transfer efficiency of process.
The method of the invention has the advantages that economical and is convenient for configuration, it is expected to be applied to actual industrial by multistage amplification
Field.
Embodiment 3
Using milk described in DCMD system concentration comparative example 3 same as Example 1.
Using operating method similar to Example 1, milk sample and ultrapure water are respectively placed in feed liquid storage tank 61 and seeped
Transparent liquid storage tank 64, feed liquid (milk) and ultrapure water pass through hot side circulating pump 62 and cold side circulating pump 65 respectively and input two-stage film respectively
Hot and cold sides cavity in component 63.The output voltage for setting thermoelectric heat pump Component driver DC power supplies at different levels constant is
24V adjusts the flow of hot side circulating pump 62 and cold side circulating pump 65, makes heat described in heat, cold side cavity temperature and comparative example 3, cold
The inlet temperature of side cavity is identical, and hot side cavity temperature is 55~56 DEG C, cold side cavity temperature is 20~21 DEG C.Original positions at different levels
The hot and cold side vessel temp of heat transfer film separation unit passes through 67 acquisition and recording of computer (computer temperature acquisition module and two-stage
The thermal resistances at different levels of membrane module connect), operation maintains hot side cavity mean temperature 35 DEG C higher than cold side cavity.In hot and cold sides
Steam pressure difference driving under, feed liquid hot side cavity film surface evaporation and to cold side heat transfer and mass transfer, thus increase penetrating fluid
Add, generated penetrating fluid is flowed out by the overflow pipe of infiltration liquid storage tank 64, and passes through the infiltration of 68 measurement unit time of balance
Liquid yield.
Under the conditions of aforesaid operations, the milk concentration amount of DCMD system is the penetrating fluid yield of unit time, at any time
Change curve it is as shown in Figure 9.The result shows that: the two-stage membrane distillation system of integrated heat pump can steadily Evamilk, for reality
System described in example 3 is applied, uses membrane area for 32cm2Membranous system continuous operation 7 hours milk concentration amounts stabilize to 20~22
Grams Per Hour has been indicated above the method for the present invention and has been expected to be applied to the food such as milk fruit juice concentration field.
Relative to conventional film Distallation systm described in comparative example 3, the present invention has higher UF membrane efficiency.Such as Fig. 9 institute
Show, membrane module membrane area having the same described in embodiment 3 and comparative example 3, milk under conditions of same feedstock temperature
Processing capacity increases close to 50%, this is because the two-stage membrane module (as shown in Figure 5) of integrated heat pump described in embodiment 1 applies
" in situ heat transfer " method and runner design scheme is optimized, thus effectively improves the Mass and heat transfer efficiency of process.
The present invention also has the advantages that economical and is convenient for configuration, it is expected to be applied to actual industrial production neck by multistage amplification
Domain.
Industry technical staff is it should be appreciated that the present invention should not be limited by the examples.It is all in the spirit and principles in the present invention
Within any modification for being made, equivalent replacement and improve etc., should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of multistage membrane module of integrated thermoelectric heat pump, which is characterized in that mainly by environment heat absorbing units, function of environment heat emission list
Member and multistage membrane module composition, every grade of membrane module include semiconductor heat pump assembly and heat transfer film separation unit in situ；
The heat transfer film separation unit in situ includes dewatering microporous film, hot side cavity, cold side cavity, liquor inlet channel, feed liquid
Exit passageway, penetrating fluid intake channel, penetrating fluid exit passageway；Hot side cavity and cold side are respectively equipped in dewatering microporous film two sides
Cavity；Hot side cavity one end is equipped with liquor inlet channel, and the other end is equipped with material liquid outlet channel；One end of cold side cavity, which is equipped with, seeps
Transparent liquid intake channel, the other end are equipped with penetrating fluid exit passageway；
A block semiconductor heat pump components are equipped between adjacent two-stage membrane module, the heat-absorbent surface of semiconductor heat pump assembly is attached to upper level film
On the cold side cavity of component, the radiating surface of semiconductor heat pump assembly is attached on the hot side cavity of next stage membrane module；Hold in hot side
The distance of chamber, radiating surface to the dewatering microporous film of semiconductor heat pump assembly is 1~5 millimeter；In cold side cavity, semiconductor heat pump group
The distance of the heat-absorbent surface of part to dewatering microporous film is 1~5 millimeter；Environment heat absorbing units are close on first order membrane module hot side cavity
Semiconductor heat pump assembly heat-absorbent surface, the radiating surface of semiconductor heat pump assembly connect with first order membrane module hot side cavity；Ring
Border heat-sink unit is close to the radiating surface of the semiconductor heat pump assembly on the cavity of afterbody membrane module cold side, semiconductor heat pump assembly
Heat-absorbent surface connect with afterbody membrane module cold side cavity.
2. the multistage membrane module of integrated thermoelectric heat pump according to claim 1, which is characterized in that the two of hot side cavity
End is respectively equipped with multiple liquor inlet channels and material liquid outlet channel, any liquor inlet channel and any material liquid outlet channel
Axis is not conllinear.
3. the multistage membrane module of integrated thermoelectric heat pump according to claim 1, which is characterized in that the two of cavity in cold side
End is respectively equipped with the multiple penetrating fluid intake channels of setting and penetrating fluid exit passageway, any penetrating fluid intake channel and any infiltration
The axis of liquid exit passageway is not conllinear.
4. the multistage membrane module of integrated thermoelectric heat pump according to claim 1, which is characterized in that the environment heat absorption is single
Member uses free convection air heat exchanger, and function of environment heat emission unit uses Forced Convection Air radiator.
5. the multistage membrane module of integrated thermoelectric heat pump according to claim 4, which is characterized in that the free convection is empty
Gas heat exchanger flows finned refrigerated heat exchanger using nature；The Forced Convection Air radiator is cold using aluminum fin fan
But device.
6. the multistage membrane module of integrated thermoelectric heat pump according to claim 4, which is characterized in that the thermoelectric heat pump
Component all includes installation frame and semiconductor chilling plate, and wherein semiconductor chilling plate selects model TEC1-19006, having a size of
40x40x4mm, assembly is in heat resistant epoxide resin installation frame.
7. the multistage membrane module of integrated thermoelectric heat pump according to claim 1, which is characterized in that the dewatering microporous film
Using the modified ultra-hydrophobic polyvinylidene fluoride planar film in surface, average film thickness 0.018mm.
8. multistage membrane module the answering in direct contact membrane distillation system of integrated thermoelectric heat pump described in claim 1
With, which is characterized in that the multistage membrane module and accessory of integrated thermoelectric heat pump form direct contact membrane distillation system, described straight
Contact membrane distillation system is connect mainly by feed liquid storage tank, hot side circulating pump, multistage membrane module, the penetrating fluid for integrating thermoelectric heat pump
Storage tank, penetrating fluid circulation composition；Feed liquid storage tank is connect by pipeline with hot side circulating pump, hot side circulating pump pass through pipeline respectively with
The liquor inlet channel connection of multiple hot side cavities of the multistage membrane module of integrated thermoelectric heat pump, integrates the more of thermoelectric heat pump
The material liquid outlet channel of multiple hot side cavities of grade membrane module is connect by pipeline with feed liquid storage tank；Infiltration liquid storage tank passes through pipeline
It is connect with penetrating fluid circulating pump, penetrating fluid circulating pump is multiple with the multistage membrane module of integrated thermoelectric heat pump respectively by pipeline
The penetrating fluid intake channel of cold side cavity connects；The infiltration of multiple cold side cavities of the multistage membrane module of multiple integrated thermoelectric heat pumps
Transparent liquid exit passageway passes through pipeline respectively and connect with infiltration liquid storage tank.
9. the multistage membrane module of integrated thermoelectric heat pump according to claim 8 is in direct contact membrane distillation system
Using, which is characterized in that seawater, sewage or liquid food to be concentrated is added in the feed liquid storage tank；The feed liquid storage tank is added
Ultrapure water realizes sea water desalination, sewage treatment or food concentration.
10. the multistage membrane module of integrated thermoelectric heat pump according to claim 9 is in direct contact membrane distillation system
Application, which is characterized in that the liquid food to be concentrated be milk.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
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| CN201811104952.2A CN109012200A (en) | 2018-09-21 | 2018-09-21 | A kind of multistage membrane module of integrated thermoelectric heat pump and its application in membrane distillation |
| PCT/CN2018/112108 WO2020056847A1 (en) | 2018-09-21 | 2018-10-26 | Multi-stage membrane assembly integrated with semiconductor heat pump and use thereof in membrane distillation |
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| CN201811104952.2A CN109012200A (en) | 2018-09-21 | 2018-09-21 | A kind of multistage membrane module of integrated thermoelectric heat pump and its application in membrane distillation |
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| CN112387122A (en) * | 2020-11-11 | 2021-02-23 | 四川大学 | Microchannel membrane distillation assembly and apparatus and method for enhancing membrane distillation transfer process using microchannels |
| WO2021105826A1 (en) * | 2019-11-25 | 2021-06-03 | King Abdullah University Of Science And Technology | Thermocouple-based distillation module and method |
| CN112933978A (en) * | 2021-01-14 | 2021-06-11 | 华南理工大学 | Flat plate type membrane component integrating feed liquid heating function and application of flat plate type membrane component in membrane distillation |
| CN113772766A (en) * | 2021-08-31 | 2021-12-10 | 南京航空航天大学 | Tandem type electroplating wastewater heat pump membrane evaporation system and method |
| CN114873684A (en) * | 2022-03-25 | 2022-08-09 | 山东大学 | Membrane distillation assembly, mixed membrane distillation water treatment system and method |
| CN115193262A (en) * | 2022-05-20 | 2022-10-18 | 华南理工大学 | Flat plate type membrane assembly for directly cooling penetrating fluid and application of flat plate type membrane assembly in membrane distillation |
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| WO2020056847A1 (en) | 2020-03-26 |
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Application publication date: 20181218 |