CN204384911U - A kind of fresh water sea salt heat energy three co-generation system - Google Patents

A kind of fresh water sea salt heat energy three co-generation system Download PDF

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CN204384911U
CN204384911U CN201420850845.5U CN201420850845U CN204384911U CN 204384911 U CN204384911 U CN 204384911U CN 201420850845 U CN201420850845 U CN 201420850845U CN 204384911 U CN204384911 U CN 204384911U
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subsystem
resorber
solution
lithium
brine
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王永青
何宏舟
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Jimei University
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Jimei University
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A20/00—Water conservation; Efficient water supply; Efficient water use
    • Y02A20/124—Water desalination
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A30/00—Adapting or protecting infrastructure or their operation
    • Y02A30/27—Relating to heating, ventilation or air conditioning [HVAC] technologies
    • Y02A30/274—Relating to heating, ventilation or air conditioning [HVAC] technologies using waste energy, e.g. from internal combustion engine
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/62—Absorption based systems
    • Y02B30/625—Absorption based systems combined with heat or power generation [CHP], e.g. trigeneration
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P20/00—Technologies relating to chemical industry
    • Y02P20/10—Process efficiency

Abstract

A kind of fresh water sea salt heat energy three co-generation system, relates to strong brine process.A kind of fresh water sea salt heat energy three co-generation system concentrated based on the sea water desalinization strong brine degree of depth of efficient, energy-conservation, compact construction, good economy performance is provided.Be provided with the degree of depth and concentrate subsystem, salt manufacturing subsystem, regeneration of waste liquor subsystem, condensation subsystem; The described degree of depth concentrates subsystem and is provided with at least 1 grade of evaporation-resorber, evaporation-resorber is provided with evaporator room, absorption chamber, liquid barrier, hot tube heat exchanger, strong brine shower, evaporation-resorber lithium-bromide solution shower, described salt manufacturing subsystem is provided with crystallization-resorber, separator, moisture eliminator, crystallization-resorber is provided with crystallisation chamber, absorption chamber, liquid barrier, described regeneration of waste liquor subsystem is provided with producer, solution heat exchanger, air-cooler, and described condensation subsystem is provided with brine preheater and condenser.

Description

A kind of fresh water sea salt heat energy three co-generation system
Technical field
The utility model relates to strong brine process, particularly relates to based on concentrated a kind of fresh water sea salt heat energy three co-generation system of the sea water desalinization strong brine degree of depth.
Background technology
As the effective way solving shortage of fresh water problem, the importance of desalination technology highlights day by day, and its development is also more and more rapider.Current global desalination water total volume is more than 7,000 ten thousand ton per days.The fresh-water recovery rate of existing desalination technology is usually less than 50%; mean that sea water desaltination is while a large amount of fresh water of production; the strong brine that quantity is larger can be discharged; its concentration and temperature are all higher than seawater; and containing chemical agent and corrosion product; direct row sea can cause pollution of the sea, and then destroys marine ecology.Along with the further expansion of sea water desaltination scale, this problem can become increasingly conspicuous.Strong brine problem, as do not properly not settled, becomes the important factor of restriction sea water desaltination development possibly.
Carry out retrieval to existing document to find, about the disposal and utilization of sea water desalinization strong brine, there has been proposed kinds of schemes, typically have strong brine to ted salt manufacturing, electrodialysis salt manufacturing, membrane distillation salt manufacturing, strong brine or bittern and extract chemicals, strong brine solar pond etc.; There is multinomial Chinese patent relevant therewith, such as: " processing the method for the raw material salt solution from desalter " (ZL201280011383) of " processing method of seawater preparing potassium dihydrogen phosphate " (ZL200310117852) of " obtain the method for lithium chloride from saline solution and implement the equipment of this method " (ZL01823738), Feng Houjun etc. of Alexandria Lei Busefu etc., " the sewater desalination combined production process method of comprehensive utilization high benefit zero release " (ZL200610151976), Ao Lifoyakebu etc. of Ge Wenyu.The strong brine Utilization plan that above-mentioned patent proposes mainly around salt manufacturing (producing fresh water) and extraction chemicals simultaneously, the advantage place of this also sea water desalinization strong brine just.
The current sea water desalinization strong brine overwhelming majority takes directly row method that is extra large or row sea after diluting, this is on the one hand relevant with people's environmental consciousness deficiency, on the other hand also with lack efficient, ripe strong brine and utilize technology to have direct relation: strong brine teds that salt manufacture floor space is large, the production cycle is long; Electroosmose process energy consumption is high, cost is high; Membrane distillation method water flux is low, film cost is high.Therefore developing strong brine comprehensive utilization technique that is efficient, energy-conservation, good economy performance is the key subject of sea water desaltination industry Sustainable development.
Lithium-bromide solution has extremely strong receptivity to water vapour, and concentrate in the strong brine degree of depth and have unique advantage in process, this point does not also cause the attention of people.Its advantage can from following three aspect analyses:
1, utilize lithium-bromide solution process strong brine, production efficiency is high, compact equipment.The receptivity of lithium-bromide solution is embodied in the water vapour pressure of solution surface far below the saturation pressure corresponding to solution temperature, such as: temperature is 40 DEG C, mass concentration is the lithium-bromide solution of 50%, water vapour pressure is 2.11kPa, the steam-laden pressure 7.38kPa corresponding far below 40 DEG C.This means, as long as water vapour pressure is higher than 2.11kPa, just can by 40 DEG C, the lithium-bromide solution of 50% absorbs.Contrast therewith, temperature is the saturated strong brine (for NaCl solution, mass concentration is 26.8%) of 40 DEG C, and its water vapour pressure is 5.63kPa, temperature is the saturated strong brine (mass concentration is 26.5%) of 30 DEG C, and its water vapour pressure is 3.18kPa.Visible, utilize lithium-bromide solution process strong brine, water vapour pressure reduction is large, mass transfer force is large, thus production efficiency is high, compact construction.
2, also can be found out by upper example, lithium-bromide solution can the much lower water vapour of its temperature of specific absorption, that is in absorption process, the comparable strong brine temperature of temperature of lithium-bromide solution is high a lot, this provides very favorable condition for reclaiming solution absorption heat and it being used for salt water vaporization.This backheat can not realize in the conventional system, but due to the characteristic of lithium-bromide solution, makes it to become possibility.
When taking 3, lithium-bromide solution as working medium, very conveniently to combine with absorption heat pump, thus greatly improve capacity usage ratio.
Analyzed from above, lithium-bromide solution has outstanding advantage in strong brine process, sets out thus, is expected to the strong brine utilization system obtaining excellent property.
Summary of the invention
The utility model aims to provide a kind of fresh water sea salt heat energy three co-generation system concentrated based on the sea water desalinization strong brine degree of depth of efficient, energy-conservation, compact construction, good economy performance.
The utility model is provided with the degree of depth and concentrates subsystem, salt manufacturing subsystem, regeneration of waste liquor subsystem, condensation subsystem;
The described degree of depth concentrates subsystem and is provided with at least 1 grade of evaporation-resorber, for by the strong brine simmer down to saturated brine after sea water desaltination, described evaporation-resorber is provided with evaporator room, absorption chamber, liquid barrier, hot tube heat exchanger, strong brine shower, evaporation-resorber lithium-bromide solution shower, evaporator room is used for strong brine vaporization, absorption chamber is used for lithium-bromide solution and absorbs water vapour, and liquid barrier is between evaporator room and the upper space of absorption chamber; The release end of heat of hot tube heat exchanger is dipped in the strong brine of evaporator room, and the heat absorbing end of hot tube heat exchanger is dipped in the lithium-bromide solution of absorption chamber; Strong brine shower is contained in evaporator room top; Evaporation-resorber lithium-bromide solution shower is contained in absorption chamber top;
Described salt manufacturing subsystem is provided with crystallization-resorber, separator, moisture eliminator, and salt manufacturing subsystem is used for concentrating the saturated brine of subsystem discharge from the degree of depth producing solid sea salt; Described crystallization-resorber is provided with crystallisation chamber, absorption chamber, liquid barrier, and crystallisation chamber is used for vaporizing saturated brine to supersaturation and forming crystallization, and absorption chamber is used for lithium-bromide solution and absorbs water vapour; Liquid barrier is between crystallisation chamber and the upper space of absorption chamber; Crystallization-resorber lithium-bromide solution shower is equipped with on absorption chamber top, described separator is used for carrying out solid-liquor separation to the salt slurry from crystallization-resorber, described moisture eliminator is used for solid salt is dry further, and the drying medium of moisture eliminator is the warm air from regeneration of waste liquor subsystem;
Described regeneration of waste liquor subsystem is provided with producer, solution heat exchanger, air-cooler, and the bromize lithium dilute solution concentrating regenerative that regeneration of waste liquor subsystem is used for the degree of depth to concentrate subsystem discharge is strong solution, reclaims recycling heat energy simultaneously, obtains warm air; In producer, driving heat source heat dilute solution, obtains strong solution and water vapour; In solution heat exchanger, bromize lithium dilute solution is heated, and strong solution is cooled; Air-cooler is for reducing lithium-bromide solution temperature, and the heat energy of recovery is used for adding warm air;
Described condensation subsystem is provided with brine preheater and condenser, in brine preheater, part is from the vapor condensation of the producer of regeneration of waste liquor subsystem, heat of condensation is used for preheating material strong brine, the condensation within the condenser of remaining water vapour, release heat energy, the water of condensation that brine preheater and condenser are discharged and fresh water.
The utility model for raw material, based on principle of absorption, produces fresh water, sea salt, heat energy with the strong brine after sea water desaltination simultaneously; The utility model comprises the degree of depth and concentrates subsystem, salt manufacturing subsystem, regeneration of waste liquor subsystem, condensation subsystem, comprises brine concentration and crystallisation process, solution moisture absorption and concentrating regenerative process, air heating and moisture absorption process, water vapour produce and condensation process; With the strong brine after sea water desaltination for raw material, with more than 100 DEG C hot water or more than 0.1MPa steam be driving heat source, additional a small amount of electric energy, can output salt concentration lower than the high-quality fresh water of 0.003% (30ppm), moisture content lower than 0.5% extra large salinity and temperature higher than the heat energy of 55 DEG C.
The utility model has the following advantages:
1, have good economic performance: slave unit aspect is seen, system is primarily of various interchanger and pump composition, and utilize routine techniques just can complete, equipment cost is low; From operation aspect, system mainly consumes low grade heat energy, and energy consumption cost is low; From output aspect, fresh water, sea salt, heat energy three kinds of products share equipment cost and running cost.If consider discharge the further utilization of high density bittern, economic benefit can be more remarkable.
2, utilize lithium-bromide solution to the strong absorption characteristic of water vapour, increase mass transfer force simultaneously, can realize efficient concentration and the rapid crystallization of strong brine by rational flow scheme design, therefore compact construction, production efficiency are high.
3, adopt interior backheating type evaporation-resorber to form absorption heat pump together with solution circulated, utilize air recovery part to absorb heat, export the heat of condensation with utility value, the utilization of above measure makes native system have the capacity usage ratio more much higher than conventional system.
4, fresh-water recovery rate is higher than 75%, and fresh water yield is large, and owing to adopting distillation method, fresh water water quality is excellent.
5, utilize the hot water of more than 100 DEG C or the steam of more than 0.1MPa to be driving heat source, additional a small amount of electric energy, i.e. the high-efficient operation of feasible system is the effective way utilizing industrial exhaust heat and solar thermal energy.
6, be applicable to very much combining with low-temperature multi-effect evaporation seawater desalinization process: native system provides driving heat energy for low-temperature multi-effect system, low-temperature multi-effect system is that native system is supplied raw materials strong brine; Also the seawater desalination system being applicable to operating lower than envrionment temperature with normal-temperature operation or the cold method etc. such as reverse osmosis combines: strong brine can be preheating to proper temperature by the heat energy that native system exports, to accelerate concentrated speed.
Accompanying drawing explanation
Fig. 1 is the structure composition schematic diagram of the utility model embodiment.
Embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is further described.
As shown in Figure 1, the utility model embodiment comprises 4 subsystems: the degree of depth concentrates subsystem 1, salt manufacturing subsystem 2, regeneration of waste liquor subsystem 3, condensation subsystem 4.
The described degree of depth concentrates subsystem 1 and comprises the 1st evaporation-resorber 11, the 2nd evaporation-resorber 12 and brinepump 13, for by the strong brine simmer down to concentration of salt concentration after sea water desaltination about 7% higher than 26% saturated brine.Described 1st evaporation-resorber 11 is made up of evaporator room 111, absorption chamber 112, liquid barrier 113, hot tube heat exchanger 114, shower 115, shower 116.Evaporator room 111 is places of strong brine vaporization, and absorption chamber 112 is places that lithium-bromide solution absorbs water vapour.Liquid barrier 113, between evaporator room 111 and the upper space of absorption chamber 112, makes water vapour can flow to absorption chamber 112 from evaporator room 111, avoids strong brine fluid spills to enter absorption chamber 112 simultaneously.The release end of heat of hot tube heat exchanger 114 is dipped in the strong brine of evaporator room 111, and heat absorbing end is dipped in the lithium-bromide solution of absorption chamber 112, for reclaiming the heat that absorption process is released, and it is used for the vaporization of strong brine.Shower 115 is equipped with on evaporator room 111 top, for being atomized strong brine, accelerates its vaporization; Shower 116 is equipped with on absorption chamber 112 top, for being atomized lithium-bromide solution, and strengthening absorption process.The top of absorption chamber 112 is connected with air extractor (air extractor does not illustrate in the drawings), to deflate or other non-condensable gasess.Described 2nd evaporation-resorber 12 evaporates with the 1st-and resorber 11 structure is identical.Shown in Fig. 1 is secondary concentration process, as the case may be, can increase, subtract the progression of concentration process in practicality.
Described salt manufacturing subsystem 2 comprises crystallization-resorber 21, separator 22, moisture eliminator 23, pump 24, pump 25, pump 26, for producing solid sea salt in the saturated brine after concentrating from the degree of depth.Crystallization-resorber 21 is made up of crystallisation chamber 211, absorption chamber 212, liquid barrier 213.Crystallisation chamber 211 is places that saturated brine is vaporized to supersaturation and then crystallization, and resorber 212 is places that lithium-bromide solution absorbs water vapour.Liquid barrier 213, between crystallisation chamber 211 and the upper space of absorption chamber 212, makes water vapour can flow to absorption chamber 212 from crystallisation chamber 211, avoids strong brine drop to enter absorption chamber 212 simultaneously.Shower 214 is equipped with on absorption chamber 212 top, for being atomized lithium-bromide solution, and strengthening absorption process.The top of absorption chamber 212 is connected with air extractor, to get rid of non-condensable gases.Separator 22, for carrying out liquid, solid separation to the salt slurry from crystallization-resorber 21, obtains water content lower than the solid salt of 3%, discharges bittern simultaneously.Moisture eliminator 23 for dry further to solid salt, finally obtain water content lower than 0.5% sea salt product; Drying medium used is the warm air from regeneration of waste liquor subsystem 3.
Described regeneration of waste liquor subsystem 3 comprises producer 31, solution heat exchanger 32, the 1st air-cooler 33, the 2nd air-cooler 34, the 3rd air-cooler 35, blower fan 36, pump 37, pump 38, pump 39, the bromize lithium dilute solution concentrating regenerative of discharging for the degree of depth being concentrated subsystem 1 is strong solution, simultaneously removal process heat energy, acquisition warm air.In producer 31, driving heat source heat dilute solution, obtains strong solution and water vapour.Solution heat exchanger 32, for heating bromize lithium dilute solution to reduce the thermal load of producer 31, cools strong solution to increase its receptivity simultaneously.1st air-cooler 33, the 2nd air-cooler 34, the 3rd air-cooler 35 are all for reducing lithium-bromide solution temperature and then increasing receptivity and arrange, and the heat energy of recovery is used for adding warm air; Gained warm air is used as the drying medium of moisture eliminator 23.
Described condensation subsystem 4 comprises brine preheater 41, condenser 42, pump 43, valve 44.Brine preheater 41, for preheating material strong brine, to improve the water vapour pressure in evaporator room 111, thus increases mass transfer force.For reducing corrosion, preheating temperature should lower than 40 DEG C.Valve 44 enters the vapor flow of brine preheater 41 for regulating; The condensation in condenser 42 of remaining water vapour, discharges the heat energy higher than 55 DEG C.The top of condenser 42 is connected with air extractor, to get rid of non-condensable gases.The water of condensation that brine preheater 41 and condenser 42 are discharged is product fresh water.
Below in conjunction with Fig. 1, describe the specific works process of fresh water sea salt heat energy three co-generation system concentrated based on the sea water desalinization strong brine degree of depth of the present utility model.
1, brine concentration and crystallisation process.Raw material strong brine after preheating, sprays into evaporator room 111 through shower 115 in brine preheater 41, and a part of shwoot is steam, and remaining strong brine falls within evaporator room 111 bottom, continues vaporization, concentrates.Lithium-bromide solution sprays into absorption chamber 112 through shower 116, after absorbing the part water vapour from evaporator room 111, falls within absorption chamber 112 bottom, continues moisture absorption, dilution.Heat energy is passed to the strong brine in evaporator room 111 by hot tube heat exchanger 114 by the lithium-bromide solution in resorber 112.Salt solution after primary concentration enters evaporator room 121 after being pressurizeed by brinepump 13, through secondary concentration, obtains saturated brine.In crystallisation chamber 211 in crystallization-resorber 21, saturated brine continues vaporization and becomes supersaturated brine, partial crystallization afterwards, and gained salt slurry, in the separator 22 through centrifugation, obtains solid salt and bittern.Bittern is discharged, and solid salt then enters moisture eliminator 23, is become product sea salt after hot-air dry.
2, solution moisture absorption and concentrating regenerative process.After bromize lithium concentrated solution from producer 31 pressurizes through solution pump 39, the 3rd air-cooler 35 is lowered the temperature, spray in the absorption chamber 212 of crystallization-resorber 21, absorb the water vapour from crystallisation chamber 211, solution temperature rising, concentration reduce; After this solution pressurizes through solution pump 26, the 2nd air-cooler 34 is lowered the temperature, spray in the absorption chamber 122 of the 2nd evaporation-resorber 12, absorb the water vapour from evaporator room 121, solution temperature rising, concentration reduce further; After this solution pressurizes through solution pump 38, the 1st air-cooler 33 is lowered the temperature, spray in the absorption chamber 112 of the 1st evaporation-resorber 11, absorb the water vapour from evaporator room 111, solution temperature rising, concentration reduce further.Gained dilute solution is pressurizeed through solution pump 37, after solution heat exchanger 32 preheating, enter producer 31, through driving heat source heating, is separated into water vapour and strong solution.
3, air heating and moisture absorption process.Air from environment pressurizes through blower fan 36, and then heated by lithium-bromide solution in the 1st air-cooler 33, the 2nd air-cooler 34, the 3rd air-cooler 35 successively, gained warm air enters moisture eliminator 23, after absorbing the moisture in sea salt, discharged to environment.
4, water vapour produces and condensation process.The moisture absorption of solution, regenerative process are in fact also the production processes of water vapour: in crystallization-resorber 21, the 2nd evaporation-resorber 12 and the 1st evaporation-resorber 11, the water vapour that salt water vaporization produces is absorbed by lithium-bromide solution, in producer 31, be vaporizated into water vapour again.Water vapour condensation in brine preheater 41 and condenser 42 becomes fresh water.
Through said process, can obtain salt concentration lower than the high-quality fresh water of 0.003% (30ppm), moisture content lower than 0.5% extra large salinity and temperature higher than the heat energy of 55 DEG C, this heat energy can be used for driving low-temperature multiple-effect seawater desalination process or other thermal processs.In addition, the bittern that system is discharged can be used as the stock liquid extracting or produce chemicals further.The utility model also can use for reference the advanced treatment for other salt solution except sea water desalinization strong brine.
The degree of depth that the utility model utilizes the strong absorption characteristic of lithium-bromide solution to water vapour to realize strong brine concentrates and crystallization.Arrange evaporation-resorber, strong brine and lithium-bromide solution carry out heat, mass transter wherein, and lithium-bromide solution absorbs water vapour, strong brine components vaporize; Usually through secondary concentration, can be just salt concentration by the brine concentration of salt concentration about 7% higher than 26% saturated brine.Arrange crystallization-resorber, by the sorption of lithium-bromide solution, making saturated brine continue vaporization becomes supersaturated brine, produces sea salt crystal afterwards.
In the utility model utilizes, the heat that partially absorbs of solution is used for strong brine vaporization by backheating type evaporation-resorber.Between the evaporator room and absorption chamber of evaporation-resorber, arrange hot tube heat exchanger, the heat release section of interchanger is dipped in the strong brine of evaporator room, and heat absorbing end is dipped in the lithium-bromide solution of absorption chamber.During system cloud gray model, the lithium-bromide solution temperature in absorption chamber is higher than the strong brine in evaporator room, and this is on the one hand relevant with the selection of design variable, on the other hand also because: absorption process is exothermic process, can bromizate lithium solution temperature and raise; Evaporative process is endothermic process, and strong brine temperature can be made to reduce.The setting of interior backheating type hot tube heat exchanger can reduce lithium-bromide solution temperature, increase its receptivity, heats strong brine simultaneously, accelerates its vaporization, concentration process.
The utility model adopts the decoration form of salt solution following current, solution adverse current, ensures mass transfer force that is concentrated and crystallisation process.In system described in the utility model, first step evaporation-resorber, second stage evaporation-resorber, crystallization-resorber series connection; Salt solution down current arrangement, enters first step evaporation-resorber, second stage evaporation-resorber, crystallization-resorber successively; Lithium-bromide solution counter-flow arrangement, is introduced into crystallization-resorber, is then second stage evaporation-resorber, first step evaporation-resorber.Such layout is according to matching principle: the salt solution that in first step evaporation-resorber, salt concentration is lower, water vapour pressure is higher and the lithium-bromide solution that concentration is lower, receptivity is more weak match; In crystallization-resorber, the lithium-bromide solution that salt solution is high with concentration, receptivity is strong that salt concentration is high, water vapour pressure is low mates; Can ensure that each process has enough mass transfer forces like this.
The utility model utilizes air cooling lithium-bromide solution to increase the receptivity of solution, and gained warm air is used as the drying medium of sea salt.Under same concentration, the temperature of lithium-bromide solution is lower, and its surface water vapor pressure is lower, solution receptivity is stronger.Therefore air-cooler is set in systems in which, for cooling the lithium-bromide solution entering evaporation-resorber and crystallization-resorber; Gained warm air is used for dry sea salt, while raising sea salt quality, system capacity is utilized more fully.

Claims (1)

1. fresh water sea salt heat energy three co-generation system, is characterized in that being provided with the degree of depth concentrates subsystem, salt manufacturing subsystem, regeneration of waste liquor subsystem, condensation subsystem;
The described degree of depth concentrates subsystem and is provided with at least 1 grade of evaporation-resorber, for by the strong brine simmer down to saturated brine after sea water desaltination, described evaporation-resorber is provided with evaporator room, absorption chamber, liquid barrier, hot tube heat exchanger, strong brine shower, evaporation-resorber lithium-bromide solution shower, evaporator room is used for strong brine vaporization, absorption chamber is used for lithium-bromide solution and absorbs water vapour, and liquid barrier is between evaporator room and the upper space of absorption chamber; The release end of heat of hot tube heat exchanger is dipped in the strong brine of evaporator room, and the heat absorbing end of hot tube heat exchanger is dipped in the lithium-bromide solution of absorption chamber; Strong brine shower is contained in evaporator room top; Evaporation-resorber lithium-bromide solution shower is contained in absorption chamber top;
Described salt manufacturing subsystem is provided with crystallization-resorber, separator, moisture eliminator, and salt manufacturing subsystem is used for concentrating the saturated brine of subsystem discharge from the degree of depth producing solid sea salt; Described crystallization-resorber is provided with crystallisation chamber, absorption chamber, liquid barrier, and crystallisation chamber is used for vaporizing saturated brine to supersaturation and forming crystallization, and absorption chamber is used for lithium-bromide solution and absorbs water vapour; Liquid barrier is between crystallisation chamber and the upper space of absorption chamber; Crystallization-resorber lithium-bromide solution shower is equipped with on absorption chamber top, described separator is used for carrying out solid-liquor separation to the salt slurry from crystallization-resorber, described moisture eliminator is used for solid salt is dry further, and the drying medium of moisture eliminator is the warm air from regeneration of waste liquor subsystem;
Described regeneration of waste liquor subsystem is provided with producer, solution heat exchanger, air-cooler, and the bromize lithium dilute solution concentrating regenerative that regeneration of waste liquor subsystem is used for the degree of depth to concentrate subsystem discharge is strong solution, reclaims recycling heat energy simultaneously, obtains warm air; In producer, driving heat source heat dilute solution, obtains strong solution and water vapour; In solution heat exchanger, bromize lithium dilute solution is heated, and strong solution is cooled; Air-cooler is for reducing lithium-bromide solution temperature, and the heat energy of recovery is used for adding warm air;
Described condensation subsystem is provided with brine preheater and condenser, in brine preheater, part is from the vapor condensation of the producer of regeneration of waste liquor subsystem, heat of condensation is used for preheating material strong brine, the condensation within the condenser of remaining water vapour, release heat energy, the water of condensation that brine preheater and condenser are discharged and fresh water.
CN201420850845.5U 2014-12-29 2014-12-29 A kind of fresh water sea salt heat energy three co-generation system Withdrawn - After Issue CN204384911U (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104528850A (en) * 2014-12-29 2015-04-22 集美大学 Trigeneration system of fresh water, sea salt and heat energy based on deep concentration of sea water desalination strong brine

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104528850A (en) * 2014-12-29 2015-04-22 集美大学 Trigeneration system of fresh water, sea salt and heat energy based on deep concentration of sea water desalination strong brine
CN104528850B (en) * 2014-12-29 2016-05-04 集美大学 Based on concentrated fresh water sea salt heat energy three co-generation systems of the sea water desalinization strong brine degree of depth

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