CN103449547B - Serial multi-stage isothermal heating multiple-effect heat return humidifying and dehumidifying solar-powered seawater desalination machine - Google Patents

Serial multi-stage isothermal heating multiple-effect heat return humidifying and dehumidifying solar-powered seawater desalination machine Download PDF

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Publication number
CN103449547B
CN103449547B CN201310411226.6A CN201310411226A CN103449547B CN 103449547 B CN103449547 B CN 103449547B CN 201310411226 A CN201310411226 A CN 201310411226A CN 103449547 B CN103449547 B CN 103449547B
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effect
tower
seawater
dehumidifying
humidification
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CN201310411226.6A
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CN103449547A (en
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郑宏飞
常泽辉
寿文杰
康慧芳
熊建银
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北京理工大学
深圳市翰超太阳能科技有限公司
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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02ATECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A20/00Water conservation; Efficient water supply; Efficient water use
    • Y02A20/10Relating to general water supply, e.g. municipal or domestic water supply
    • Y02A20/124Water desalination
    • Y02A20/126Water desalination characterized by the method
    • Y02A20/128Evaporation methods, e.g. distillation
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02ATECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A20/00Water conservation; Efficient water supply; Efficient water use
    • Y02A20/10Relating to general water supply, e.g. municipal or domestic water supply
    • Y02A20/124Water desalination
    • Y02A20/126Water desalination characterized by the method
    • Y02A20/128Evaporation methods, e.g. distillation
    • Y02A20/129Evaporation methods, e.g. distillation using solar energy
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02ATECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A20/00Water conservation; Efficient water supply; Efficient water use
    • Y02A20/10Relating to general water supply, e.g. municipal or domestic water supply
    • Y02A20/124Water desalination
    • Y02A20/138Water desalination powered by a renewable energy source
    • Y02A20/142Water desalination powered by a renewable energy source the source being solar thermal or photovoltaics
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02ATECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A20/00Water conservation; Efficient water supply; Efficient water use
    • Y02A20/10Relating to general water supply, e.g. municipal or domestic water supply
    • Y02A20/208Off-grid powered water treatment
    • Y02A20/212Solar-powered wastewater sewage treatment, e.g. spray evaporation

Abstract

The invention provides a serial multi-stage isothermal heating multiple-effect heat return humidifying and dehumidifying solar-powered seawater desalination machine comprising a solar heat collector, a hot water storage tank, a plurality of humidifying towers, a dehumidifying tower, seawater spray heads, a draught fan, a plastic pellet, a stainless steel disc, a condenser and a water pump, wherein the plurality of humidifying towers can be connected in series; the tops of the humidifying towers are provided with the seawater spray heads; part of feed seawater and humid high-temperature air in the dehumidifying tower are subjected to heat exchange in the condenser, then, part of the seawater is directly sprayed on the surface of the plastic pellet to form a seawater film with a large contact area, the seawater film is subjected to heat and humidity exchange with air flowing from bottom to top to form saturated humid air which is delivered into the dehumidifying tower under the action of the draught fan and is condensed by the feed seawater to generate fresh water, the residual feed seawater is divided into a plurality of paths and is simultaneously delivered into the hot water storage tank after absorbing the latent heat of the humid air so as to continue to be heated to raise the temperature, and then, the residual feed seawater is sprayed after entering the corresponding humidifying tower and is condensed in the dehumidifying tower to generate the fresh water. By using the serial multi-stage isothermal heating multiple-effect heat return humidifying and dehumidifying solar-powered seawater desalination machine, the utilization ratio of solar energy in a seawater desalination device is increased.

Description

The multistage isothermal heating multiple-effect of tandem backheat humidification dehumidifying solar seawater desalination machine

Technical field

The present invention relates to a kind of seawater desalination machine, be specifically related to the multistage isothermal heating multiple-effect of a kind of tandem backheat humidification dehumidifying solar seawater desalination machine, belong to solar seawater desalination and water-treatment technology field.

Background technology

At present, the population in the whole world about 1/3rd is lived in the countries and regions of lack of water, and by 2025, this numeral will be increased to 2/3rds.Solve the problem of shortage of fresh water, one of most important approach is to carry out seawater (brackish water) desalination.Yet traditional seawater (brackish water) desalination techniques need to consume a large amount of conventional energy resourcess, has aggravated the consumption of resource and has brought environmental pollution.Heliotechnics is combined with seawater (brackish water) desalination techniques, is that solution economy and social sustainable development are to one of effective measure of existing Freshwater resources excessive use.Humidification dehumidification type desalination process by heating, evaporation and condensation process separately, can adopt like this each process of technique targetedly, improve the energy utilization efficiency of each process, simultaneously it also have control simple, produce that water is stable, normal pressure operation, consume energy low, be easy to and the advantage such as renewable energy source combination.Utilize sun power to provide sufficient heat energy for dehumidifying humidifying type desalination technology, cost of investment that both can economy system, can also reduce pollution on the environment.Based on These characteristics, humidification dehumidification type solar seawater desalination system is considered to efficiently utilize the mode most with application prospect of solar energy production fresh water.

Application number 201010509740.X discloses a kind of spray evaporation air moistening dehumidification type solar energy sea water desalination apparatus, utilize air setting effect, but cooling performance is poor, seawater does not have preheating and large and need to arrange in addition that condensing heat exchanger cause apparatus structure complicated with the warm air temperature difference.

Application number 201110304566.X discloses a kind of semidrying gas humidification dehumidification type seawater desalination system and method, and after its heat exchange, the direct discharger of wet air causes entering in calorific loss, spouted bed vaporizer difficult control of seawater amount and is easy to form in bottom that ponding stops up air nozzle, heat-exchange working medium does not form Efficient Cycle.

Summary of the invention

In view of this, the invention provides the multistage isothermal heating multiple-effect of a kind of tandem backheat humidification dehumidifying solar seawater desalination machine, can make full use of the vapor condenses latent heat in dehumidifying humidifying type solar energy sea water desalination apparatus, improve unit collector area water production rate, reduce the unit volume fresh water cost of solar seawater desalination, the solar energy utilization ratio of raising in sea water desalinating plant, can be used on the remote hinterland and island that lacks fresh water, especially for use in the high area of solar irradiance.

The multistage isothermal heating multiple-effect of a kind of tandem backheat humidification dehumidifying solar seawater desalination machine, this seawater desalination machine comprises solar energy collector, water pump, heat storage water tank, under meter, valve, humidification tower, dehumidifying tower and blower fan, wherein humidification tower inside comprises seawater spraying head, plastic pellet, Stainless Steel Disc and water level current limiting tube, dehumidifying tower inside comprises condenser, heat storage water tank inside comprises interchanger a, interchanger b, humidification tower is divided into the first effect humidification tower, the second effect humidification tower and triple effect humidification tower, in the first effect humidification tower, also comprise into seawater spraying head, dehumidifying tower is divided into the first effect dehumidifying tower, the second effect dehumidifying tower and triple effect dehumidifying tower,

Annexation: the first effect humidification tower, the second effect humidification tower and triple effect humidification tower three vertically arrange, the first effect dehumidifying tower, the second effect dehumidifying tower and triple effect dehumidifying tower three also vertically arrange, and lay respectively at same level height with three humidification towers respectively;

The first effect humidification tower, the second effect humidification tower and triple effect humidification tower three inner cavity top are respectively arranged with the first effect seawater spraying head, the second effect seawater spraying head and triple effect seawater spraying head, entering seawater spraying head is also arranged in the first effect humidification tower and is positioned at the first effect seawater spraying head below, inner chamber middle and lower part is provided with Stainless Steel Disc, holding is set on Stainless Steel Disc plastic pellet, and the first effect humidification tower and the second effect humidification tower intracavity bottom are all vertically provided with water level current limiting tube; The first effect dehumidifying tower, the second effect dehumidifying tower and triple effect dehumidifying tower three inner chamber are respectively arranged with condenser a, condenser b and condenser c;

The hot water outlet of solar energy collector is connected with the water-in of heat storage water tank, and the water outlet of heat storage water tank is connected with the water-in of solar energy collector by water pump;

One end of the condenser c of triple effect dehumidifying tower inside is connected with outside charging seawater after by charging seawaterline relay pump, the other end of condenser c is divided into two-way, one road series connected valve connects discharger, another road series connected valve is connected with one end of the condenser b of the second effect dehumidifying tower inside, the other end of condenser b is also divided into two-way, one tunnel successively after series connected valve, under meter with enter seawater spraying head and be connected, another Lu Yu triple effect seawater spraying head is connected; The first effect humidification tower bottom is connected with the water-in of interchanger b by seawaterline relay pump, the water outlet of interchanger b is connected with the first effect seawater spraying head, the water-in that the second effect humidification tower bottom passes through the condenser a in seawaterline relay pump and the first effect dehumidifying tower is connected, the water outlet of condenser a is connected with the water-in of interchanger b, and the water outlet of interchanger b is connected with the second effect seawater spraying head; The bottom of triple effect humidification tower connects outside concentrated seawater collector, and the bottom of triple effect dehumidifying tower connects outside fresh water collecting apparatus by means; Three humidification towers are communicated with top mutually with the bottom of three dehumidifying towers, and are provided with blower fan in foot passage.

There is hydrophilic film on the surface of described plastic pellet, and surface is also distributed with aperture.

In passage between three dehumidifying towers and blower fan, be provided with water eliminator.

Described Stainless Steel Disc adopts sieve type Stainless Steel Disc.

Beneficial effect:

The present invention utilizes multistage isothermal sprinkling system, hydrophilic porous plastic pellet, water level current limiting tube etc. has improved the heat transfer of charging seawater and air, mass transfer coefficient, and the water capacity of wet air, increased the contact area of seawater and air, utilize multiple-effect heat regenerating method, charging seawater has been carried out to preheating, reduced the thermal resistance between wet air and low-temperature receiver, effectively utilized in multiple times the latent heat of condensation of steam, reduced charging seawater and set the temperature difference that starts Heating temperature, shortened the start time of device, reduced concentrated seawater row temperature, effectively to arranging the ecotope in dense marine site, protect, concrete advantage is as follows:

(1) the present invention improves the tradition humidifying type solar seawater desalination system that dehumidifies, realized multistage isothermal heating, each effect is aspect heat energy utilization, by spray after concentrated seawater isothermal heating at the bottom of tower is produced to wet air, each effect makes full use of each heat energy of obtaining of effect, respectively imitates heat utilization rate more balanced in this sampling device;

(2) the present invention takes full advantage of the latent heat of condensation of wet air, and each effect institute's fresh water amount of producing and to arrange concentrated seawater amount basically identical, without configuring and carry out flow adjustment at water pump;

(3) the present invention sprays in humidification tower after directly charging seawater being heated in heat storage water tank, has reduced tediously long heat exchanging pipe and interchanger, has reduced thermosteresis;

(4) device of the present invention is imitated number can increase according to required fresh water yield, and in the middle of only needing to increase, several effects are just passable, and first does not need to change with last effect; And each effect operation of device is non-interference, is convenient to detect, debugging, if there is seepage, does not need all to split maintenance.

Accompanying drawing explanation

Fig. 1 is the schematic diagram of triple effect seawater desalination machine of the present invention.

Fig. 2 is the schematic diagram of the present invention's two sea water desalting machines.

Fig. 3 is the schematic diagram of quadruple effect seawater desalination machine of the present invention.

Wherein, 1-solar thermal collection system; 2-water pump; 3-heat storage water tank; 4a, 4b, 4c, 4d-interchanger; 5-the first effect seawater spraying head; 6a, 6b, 6c, 6d-humidification tower; 7-plastic pellet; 8-enters seawater spraying head; 9-Stainless Steel Disc; 10-the second effect seawater spraying head; 11a, 11c-water level current limiting tube; 12-triple effect seawater spraying head; 13-blower fan; 14-water eliminator; 15-wet air; The 16-tower that dehumidifies; 17-under meter; 18-valve; Condenser a-19, condenser b-20, condenser c-21, condenser d-22.

Embodiment

Below in conjunction with the accompanying drawing embodiment that develops simultaneously, describe the present invention.

The invention provides the multistage isothermal heating multiple-effect of a kind of tandem backheat humidification dehumidifying solar seawater desalination machine, this seawater desalination machine gets up a plurality of dehumidifying humidifying type sea water desalinating plant tandems, charging seawater is to participate in desalination process by the vertical arrangement mode access to plant of connecting, form a multiple-effect sun power dehumidifying humidifying type sea water desalinating plant, realize multistage humidification dehumidification process; Utilize solar energy collector to carry out heat temperature raising to charging seawater, then through seawater spraying head, spray into and respectively imitate in humidification tower, realize the process to seawater isothermal heating; Carry out the wet exchange of heat with air and form wet saturated steam, under the blower fan in each effect steam-pipe drives, enter in corresponding dehumidifying tower, realized the process of humidification dehumidifying; The charging seawater of hot and humid steam and condenser inside carries out heat exchange, condensation, generates fresh water, charging seawater is carried out to preheating simultaneously, has realized the process of multiple-effect backheat, has improved the efficiency of utilization of sun power.

As shown in Figure 1, this seawater desalination machine comprises solar energy collector 1, water pump 2, heat storage water tank 3, interchanger 4a, 4b, the first effect seawater spraying head 5, the first effect humidification tower 6a, plastic pellet 7, enter seawater spraying head 8, Stainless Steel Disc 9, the second effect seawater spraying head 10, water level current limiting tube 11, triple effect seawater spraying head 12, blower fan 13, water eliminator 14, the first effect dehumidifying tower 16a, under meter 17, valve 18, condenser a19, condenser b20, condenser c21, the second effect humidification tower 6b, the second effect dehumidifying tower 16b, triple effect humidification tower 6c and triple effect dehumidifying tower 16c,

Three humidification towers and the tower that dehumidifies are circular cylindrical cavity, and a plurality of humidification towers are all connected by tandem moor with dehumidifying tower, and the drain pan of the first effect tower is as the top shell of the second effect tower, and the drain pan of the second effect tower is as the top shell of triple effect tower.

It is porose that plastic pellet 7 surfaces have hydrophilic film and surface also to distribute.

Integrated connection relation: the first effect humidification tower 6a inner cavity top is installed the first effect seawater spraying head 5 and enters seawater spraying head 8, enter seawater spraying head 8 and be positioned at the first effect seawater spraying head 5 belows, inner chamber middle part is welded with sieve type Stainless Steel Disc 9, Stainless Steel Disc 9 adopts sieve type Stainless Steel Disc, seawater can leak down from Stainless Steel Disc 9, on Stainless Steel Disc 9, holding has plastic pellet 7, and intracavity bottom is provided with water level current limiting tube 11, the first effect dehumidifying tower 16 inner chambers and is provided with condenser 19a.

The second effect humidification tower 6b inner cavity top is installed the second effect seawater spraying head 10, inner chamber middle part is welded with Stainless Steel Disc, on Stainless Steel Disc, be also provided with plastic pellet, intracavity bottom is provided with water level current limiting tube, the second effect dehumidifying tower 16b inner chamber is provided with condenser b20, the second effect dehumidifying tower 16b bottom is communicated with outlet pipeline, and on outlet pipeline, is provided with valve 18.

Triple effect humidification tower 6c inner cavity top is installed triple effect seawater spraying head 12, inner chamber middle part is welded with Stainless Steel Disc, on Stainless Steel Disc, be also provided with plastic pellet, triple effect dehumidifying tower 16c inner chamber is provided with condenser c21, triple effect humidification tower 6c bottom connects concentrated seawater collector, triple effect dehumidifying tower 16c bottom connects fresh water collecting apparatus by means, and triple effect dehumidifying tower 16c bottom is also communicated with charging seawaterline, is also provided with water pump on pipeline.

The hot water outlet of solar energy collector 1 is connected with the water-in of heat storage water tank 3, and the water outlet of heat storage water tank 3 is connected with the water-in of solar energy collector 1 by water pump 2;

One end of the condenser c21 of triple effect dehumidifying tower 16c inside is connected with outside charging seawater after by pipeline relay pump, the other end of condenser c21 is divided into two-way, one road series connected valve 18 connects discharger, one end of the condenser b20 of another road series connected valve and the second effect dehumidifying tower 16b inside, the other end of condenser b20 is also divided into two-way, one tunnel successively after series connected valve, under meter 17 with enter seawater spraying head 8 and be connected, another Lu Yu triple effect seawater spraying head 12 is connected;

The first effect humidification tower 6a bottom is connected with the water-in of interchanger 4b by seawaterline relay pump, the water outlet of interchanger 4b is connected with the first effect seawater spraying head 5, the water-in that the condenser 19a in seawaterline relay pump and the first effect dehumidifying tower 16a is passed through in the second effect humidification tower 6b bottom is connected, the water outlet of condenser 19a is connected with the water-in of interchanger 4b, and the water outlet of interchanger 4b is connected with the second effect seawater spraying head 10;

Each effect humidification tower is all connected with top and the bottom of dehumidifying tower, and in foot passage, is respectively arranged with blower fan 13, in the passage between three dehumidifying towers and blower fan, is provided with water eliminator 14, prevents that the concentrated seawater that blower fan condenses from polluting the fresh water in dehumidifying tower.

Principle of work: charging seawater by charging seawaterline by water pump first in the condenser c21 in suction triple effect dehumidifying tower 16c, in entering the second effect dehumidifying tower 16b before condenser, from valve 18 discharge section seawater, the vapor temperature of last effect is lower, need a large amount of seawater to carry out cooling generation fresh water, if still so many seawater are all delivered in a upper effect condenser, the temperature rise producing is less, be unfavorable for that seawater finally enters humidification tower and carries out spraying and sprinkling evaporation, therefore discharge section seawater; Residual seawater enters in the condenser b21 in the second effect dehumidifying tower 16b, through with condenser outside wet air heat exchange after, this part seawater is divided into two-way and enters into respectively in triple effect humidification tower 6c and the first effect humidification tower 6a, the seawater entering in triple effect humidification tower 6c pours on the hydrophilic porous plastic pellet of multilayer through triple effect spray header 12, and the concentrated seawater of triple effect humidification tower 6c bottom is by outside pipeline discharger;

The seawater entering in the first effect humidification tower 6a sprays to multilayer on hydrophilic porous plastic pellet 7 through entering seawater spraying head 8, on bead, hydrophilic film and hole can form the seawater film that area is very large, air flows from the bottom up and forms Hot wet air heating 15 with the wet exchange of seawater film heat and enters into the first effect dehumidifying tower 16a under blower fan 13a drives, the aperture of the concentrated seawater not being evaporated on screen hole type load-bearing plate 9 flows to the first effect humidification tower 6a bottom, water level current limiting tube in the first effect humidification tower 6a guarantees that tower bottom retains the concentrated seawater of setting volume, amount at the bottom of top sprayed sea water flows into tower has surpassed the height of water level current limiting tube, seawater will be imitated water level current limiting tube by this and be flow on the hydrophilic porous plastic pellet of multilayer of next effect, wherein the concentrated seawater of the first effect humidification tower 6a bottom is extracted into by water pump to be heated to heat up in the interchanger 4 of heat storage water tank 3 and again sprays in the first effect humidification tower 6a by the first effect spray header 5, the concentrated seawater of the second effect humidification tower 6b bottom carries out heat exchange in 16a condenser in water pump is extracted into the first effect dehumidifying tower, then the interchanger 4a that enters into heat storage water tank 3 intensification of being heated, in being sprayed onto the second effect humidification tower 6b, the second effect seawater spraying head 10 generates wet air, the heating of seawater that solar energy collector 1 is given in heat storage water tank 3.

Hot wet air heating in first, second, and third effect humidification tower carries out condensation in blower fan is driven into corresponding dehumidifying tower, the pre-hot sea water of the latent heat of vaporization that wet air condenses into fresh water and discharges on condenser 19, fresh water can along pipeline flow to dehumidifying tower bottom escape and enter in fresh water collecting apparatus by means.

Fig. 2 is the enforcement illustration of two effect dehumidifying humidifying type solar seawater desalination machines.Operation logic is explained as follows:

Change the triple effect humidifying type solar seawater desalination machine that dehumidifies into two effects dehumidifying humidifying type solar seawater desalination machines, the condenser b20 of charging seawater from the second effect dehumidifying tower 16b out after, be divided into two-way, the valve 18 of leading up to is discharged a part of seawater, the other end enters the one end of the condenser a19 in the first effect dehumidifying tower 16a, the other end of condenser a19 is divided into two-way, one tunnel is series connected valve successively, after under meter 17, through entering seawater spraying head 8, spray in the first effect humidification tower 6a, another road second effect seawater spraying head 10 drenches into the second humidification tower 6b, the first effect humidification tower 6a bottom concentrated seawater is extracted in the interchanger 4d of heat storage water tank 2 by water pump, being heated heats up sprays in the first effect humidification tower 6a by the first effect seawater spraying head 5, device operation is simple, heat storage water tank volume is little, floor space is little, be convenient to each component integration, be applicable to need the user of less fresh water amount.

Fig. 3 is the enforcement illustration of quadruple effect dehumidifying humidifying type solar seawater desalination machine.Operation logic is explained as follows:

The triple effect humidifying type solar seawater desalination machine that dehumidifies is increased to quadruple effect dehumidifying humidifying type solar seawater desalination machine, under triple effect humidification tower in triple effect device and dehumidifying tower, increase quadruple effect humidification tower and dehumidifying tower, charging seawater is by water pump first in the condenser d22 in suction quadruple effect dehumidifying tower 16d, in entering triple effect dehumidifying tower 16c before condenser, through valve 18 discharge section seawater, residual seawater enters in the condenser c21 of 16c in triple effect dehumidifying tower, through with condenser outside wet air heat exchange after, this part seawater is divided into two-way and enters into respectively in quadruple effect humidification tower 6d and the first effect humidification tower 6a, the seawater entering in quadruple effect humidification tower 6d sprays to multilayer on hydrophilic porous plastic pellet through quadruple effect seawater spraying head 20, the concentrated seawater of quadruple effect humidification tower 6d bottom is by outside pipeline discharger,

The seawater entering in the first effect humidification tower 6a sprays to multilayer on hydrophilic porous plastic pellet 7 through entering seawater spraying head 8, the special structure of bead can form the seawater film that area is very large, air flows from the bottom up and forms Hot wet air heating 15 with the wet exchange of seawater film heat and enters into dehumidifying tower 16a under blower fan 13a drives, the aperture of the concentrated seawater not being evaporated on sieve type Stainless Steel Disc 9 flows to humidification tower 6a bottom, water level current limiting tube 11a guarantees that tower bottom retains the concentrated seawater of setting volume, amount at the bottom of top sprayed sea water flows into tower has surpassed the height of water level current limiting tube 11a, seawater will flow on the hydrophilic porous plastic pellet 7 of multilayer of next effect by water level current limiting tube 11a, wherein the concentrated seawater of the first effect humidification tower 6a bottom is extracted into be heated to heat up in the interchanger 4c in heat storage water tank 3 by water pump and again sprays in the first effect humidification tower 6a by the first effect spray header 5, the concentrated seawater of the second effect humidification tower 6b bottom carries out heat exchange in 16a condenser in water pump is extracted into the first effect dehumidifying tower, then the interchanger 4a that enters into heat storage water tank 3 intensification of being heated, in being sprayed onto the second effect humidification tower 6b, the second effect seawater spraying head 10 generates wet air, the concentrated seawater of triple effect humidification tower 6c bottom carries out heat exchange in 16b condenser in water pump is extracted into the second effect dehumidifying tower, then the interchanger 4b that enters into heat storage water tank 3 intensification of being heated generates wet air in triple effect seawater spraying head 12 is sprayed onto triple effect humidification tower 6c, solar energy collector 1 gives heat storage water tank 3 heating.

First, second, third and quadruple effect humidification tower in wet air in blower fan is driven into corresponding dehumidifying tower, carry out condensation, the pre-hot sea water of the latent heat of vaporization that wet air condenses into fresh water and emits on condenser 19, fresh water can along pipeline flow to dehumidifying tower bottom escape and enter in fresh water collecting apparatus by means.

The application of quadruple effect dehumidifying humidification tower has increased the fresh water production water yield of device, is applicable to need the user of more fresh water amount.

The present invention has utilized the low feature of charging seawater temperature, in dehumidifying tower, improved the coefficient of heat transfer of wet air and charging seawater, the effect of wet air being carried out to condensation can be more obvious, latent heat of condensation utilization ratio can be higher, apparatus structure is simpler, safeguard more convenient, and also utilize multistage isothermal heating mode, improved sprayed sea water temperature, increased the water capacity of respectively imitating wet air, in addition last effect has been done further utilization to the contained heat energy of concentrated seawater, has reduced concentrated seawater row temperature, has improved the utilising efficiency of sun power and the water production rate of unit collector area.

System of the present invention just can be moved under normal pressure, even if operating temperature lower (50 ℃ of ﹤) also can be produced water, and it is reliable and stable to produce water.

In sum, these are only preferred embodiment of the present invention, be not intended to limit protection scope of the present invention.Within the spirit and principles in the present invention all, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.

Claims (4)

1. the multistage isothermal heating multiple-effect of tandem backheat humidification dehumidifying solar seawater desalination machine, it is characterized in that, this seawater desalination machine comprises solar energy collector, water pump, heat storage water tank, under meter, valve, humidification tower, dehumidifying tower and blower fan, wherein humidification tower inside comprises seawater spraying head, plastic pellet, Stainless Steel Disc and water level current limiting tube, dehumidifying tower inside comprises condenser, heat storage water tank inside comprises interchanger a, interchanger b, humidification tower is divided into the first effect humidification tower, the second effect humidification tower and triple effect humidification tower, in the first effect humidification tower, also comprise into seawater spraying head, dehumidifying tower is divided into the first effect dehumidifying tower, the second effect dehumidifying tower and triple effect dehumidifying tower,
Annexation: the first effect humidification tower, the second effect humidification tower and triple effect humidification tower three vertically arrange, the first effect dehumidifying tower, the second effect dehumidifying tower and triple effect dehumidifying tower three also vertically arrange, and lay respectively at same level height with three humidification towers respectively;
The first effect humidification tower, the second effect humidification tower and triple effect humidification tower three inner cavity top are respectively arranged with the first effect seawater spraying head, the second effect seawater spraying head and triple effect seawater spraying head, entering seawater spraying head is also arranged in the first effect humidification tower and is positioned at the first effect seawater spraying head below, inner chamber middle and lower part is provided with Stainless Steel Disc, in on Stainless Steel Disc, arrange and be contained with plastic pellet, the first effect humidification tower and the second effect humidification tower intracavity bottom are all vertically provided with water level current limiting tube; The first effect dehumidifying tower, the second effect dehumidifying tower and triple effect dehumidifying tower three inner chamber are respectively arranged with condenser a, condenser b and condenser c;
The hot water outlet of solar energy collector is connected with the water-in of heat storage water tank, and the water outlet of heat storage water tank is connected with the water-in of solar energy collector by water pump;
One end of the condenser c of triple effect dehumidifying tower inside is connected with outside charging seawater after by charging seawaterline relay pump, the other end of condenser c is divided into two-way, one road series connected valve connects discharger, another road series connected valve is connected with one end of the condenser b of the second effect dehumidifying tower inside, the other end of condenser b is also divided into two-way, one tunnel successively after series connected valve, under meter with enter seawater spraying head and be connected, another Lu Yu triple effect seawater spraying head is connected; The first effect humidification tower bottom is connected with the water-in of interchanger b by seawaterline relay pump, the water outlet of interchanger b is connected with the first effect seawater spraying head, the water-in that the second effect humidification tower bottom passes through the condenser a in seawaterline relay pump and the first effect dehumidifying tower is connected, the water outlet of condenser a is connected with the water-in of interchanger b, and the water outlet of interchanger b is connected with the second effect seawater spraying head; The bottom of triple effect humidification tower connects outside concentrated seawater collector, and the bottom of triple effect dehumidifying tower connects outside fresh water collecting apparatus by means; Three humidification towers are communicated with top mutually with the bottom of three dehumidifying towers, and are provided with blower fan in foot passage.
2. the multistage isothermal heating multiple-effect of tandem as claimed in claim 1 backheat humidification dehumidifying solar seawater desalination machine, is characterized in that, there is hydrophilic film on the surface of described plastic pellet, and surface is also distributed with aperture.
3. the multistage isothermal heating multiple-effect of tandem as claimed in claim 1 backheat humidification dehumidifying solar seawater desalination machine, is characterized in that, in the passage between three dehumidifying towers and blower fan, is provided with water eliminator.
4. the multistage isothermal heating multiple-effect of tandem as claimed in claim 1 backheat humidification dehumidifying solar seawater desalination machine, is characterized in that, described Stainless Steel Disc adopts sieve type Stainless Steel Disc.
CN201310411226.6A 2013-09-11 2013-09-11 Serial multi-stage isothermal heating multiple-effect heat return humidifying and dehumidifying solar-powered seawater desalination machine CN103449547B (en)

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CN201678475U (en) * 2009-06-30 2010-12-22 中国石油大学(华东) Solar seawater desalination device
CN101797479B (en) * 2010-02-25 2012-09-05 北京理工大学 Method and device for distillating vacuum film by directly utilizing vapor compression heat pump
CN101885515B (en) * 2010-07-22 2013-05-01 深圳市和平卧龙科技有限公司 Multi-level solar sea water desalting plant
CN102225787B (en) * 2011-05-17 2012-10-17 浙江大学 Composite solar seawater desalination device and method
JP5801663B2 (en) * 2011-09-15 2015-10-28 一般財団法人航空宇宙技術振興財団 seawater desalination equipment

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