CN1329309C - Desalinization method by stepwise circulation of non-explosive evaporation and condensation - Google Patents
Desalinization method by stepwise circulation of non-explosive evaporation and condensation Download PDFInfo
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- CN1329309C CN1329309C CNB2004100605636A CN200410060563A CN1329309C CN 1329309 C CN1329309 C CN 1329309C CN B2004100605636 A CNB2004100605636 A CN B2004100605636A CN 200410060563 A CN200410060563 A CN 200410060563A CN 1329309 C CN1329309 C CN 1329309C
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Abstract
The present invention relates to a desalting method by non-boiling evaporation and condensation stepwise circulation. The desalting method can effectively solve the desalting problem of solution containing salt. A condenser and an evaporator are used; air is used as a medium under the closed condition; the wet air is utilized; the water is carried and evaporated by high-temperature saturation air, and is cooled in a low-temperature condensation channel; and the water is lost, and the condensing heat is discharged. The discharged condensing heat is fully absorbed and utilized by an evaporation and humidifying channel on the other side, and is used for heating and humidifying the sprayed salt water and low-temperature saturation air which reversely flows and returns after being dehydrated. The salt water and the low-temperature saturation air enter an evaporator, and are heated and humidified by an external heat source to the saturation state. The condensed water yielded in the cooling process is collected and delivered. The method has the advantages that the evaporation and the condensation are simultaneously carried out in steps. The damp heat and the latent heat are sufficiently converted; the mass transfer and the heat transfer are enhanced; the energy can be sufficiently recycled; the desalting efficiency can be obviously enhanced; the operating cost is decreased; and the device volume is reduced. The method has huge economical and social benefits on popularization and application.
Description
One, technical field
The present invention relates to a kind of non-boiling and evaporates the desalting method that carries out with the condensation classification cycle, is used for fields such as water treatment, solution desalination, the desalination of sea (halogen) water, discarded reusing of energy source.
Two, background technology
At present, many areas, the whole world are faced with famine fresh water, and normal production and living has been subjected to great threat, severe exacerbation the environment of human kind sustainable development.With regard to coastland and inland desertization area, the coastland has wide marine site water resources, and the inland desert area has abundant bittern resource, but can not directly use.And such as a large amount of low-grade exhaust heat of place discharging in service such as electricity power enterprise, pharmaceutical factory, hospital, offshore drilling platform, boats and ships naval vessels, frontier defense island, vast desert area have competent sun power again.Though at present existingly be used for obtaining soft water or desalinize seawater, alleviated the threat that fresh water lacks to a certain extent such as methods such as multi-effect distilling, reverse osmosis, multistage flash evaporation.But take a broad view of existing method and device, the ubiquity system is huge, complex process, and the water producing cost height is invested hugely etc., and can not utilize the discarded energy efficiently.Can find a kind ofly can make full use of the discarded energy, and the method for cheap, efficient, the simple bittern desalination of technology, sea water desaltination?
Three, summary of the invention
At above-mentioned situation, the present invention's purpose provides a kind of non-boiling and evaporates the desalting method that carries out with the condensation classification cycle, can effectively solve the desalting problem of saline solns, the technical scheme of its solution is to utilize condensation and vaporizer under normal pressure enclosed environment, with the air is working medium, utilize the wet air characteristic, carry evaporation moisture content with the high temperature saturated air, to the cooling of cryogenic condensation passage, lose moisture content and emit heat of condensation, the heat of condensation of emitting is added wet channel by the opposite side evaporation and fully absorbs, be used for the low temperature saturated air warming and humidifying that returns after the salt solution of spray and the dehydration of countercurrent flow, enter vaporizer afterwards, utilize external heat source to strengthen warming and humidifying to state of saturation, send after the water of condensation of output is collected in the process of cooling, be required fresh water.Evaporation is carried out simultaneously with the condensation substep in present method, damp and hot, latent heat is fully changed, mass-and heat-transfer is strengthened and is carried out, the abundant recycle of energy can improve desalting efficiency significantly, reduces working cost, the volume of reduction equipment, it is applied, and has opened up new technology shortcut for the brinish desalination, and huge economic and social benefit is arranged.
Four, description of drawings
Fig. 1 is the workflow diagram of the inventive method.
Fig. 2 is condensation of the present invention and evaporator operation synoptic diagram.
Fig. 3 is a heating fumigators work synoptic diagram of the present invention.
Fig. 4 is the evaporation structure sectional front view.
Fig. 5 is condensation and evaporation structure sectional front view.
Fig. 6 is condensation and the another kind of structural profile front view of vaporizer.
Five, embodiment
The present invention is that hot-fluid enters heating fumigators, through interchanger, emits heat, heats simultaneously with the spray salt solution of opposite side and with the wet air of spray water countercurrent flow, and the rear section water evaporates of being heated is also taken away by the warm air after heating up, and realizes that water salt separates; The hot and humid air that heating fumigators is sent enters condensation and vaporizer.Wherein be furnished with condensation channel and evaporation channel, the two is separated by partition.The high temperature saturated air that enters in the condensation channel is cooled off by the wet air of the hypothermic saline that sprays in the passage opposite side evaporation channel, countercurrent flow, loses condensation moisture content, emits heat of condensation, and the saturated air after temperature reduces returns work.Form airtight complete material cycle, send output finished product water after the water of condensation of output (fresh water) is collected in the condensation process.
Below in conjunction with accompanying drawing the specific embodiment of the present invention is elaborated.
By shown in Figure 1, to be hot-fluid 1-1 enter from the evaporation side of heating fumigators A in the present invention, through its heat exchange, emit heat, the spray salt solution 2-5-2 of upside (being the saliferous solion), from next salt solution (crude brine) 2-4 of upper level, and with the wet air 3-3 of spray countercurrent flow simultaneously through heating fumigators A, hot and humid gas 3-4 after the rear section water evaporates of being heated and quilt heat up takes away, the unevaporated salt solution of part and other salts fall into kerve, realize that water salt separates, the hot-fluid 1-2 after the heat release is through heat exchanger c, with the salt solution 2-4 from upper level of spray, wet air 3-2 carries out preheating, after emitting the part heat, hot-fluid 1-3 returns thermal source; The hot and humid gas 3-4 that heating fumigators A sends, enter the condensation channel of condensation and vaporizer B, be condensed and vaporizer B opposite side spray solution 2-3-1, low temperature wet air 3-1 cooling, lose water of condensation 4, emit heat of condensation, saturated air 3-5 after temperature reduces, d returns through blower fan, by the low temperature saturated moist air 3-1 that blower fan d comes, the evaporation channel of flow through condensation and vaporizer B, the wet air 3-2 behind the warming and humidifying, hot wet air 3-3 after heat exchanger c is further heated humidification enters vaporizer A, form sealing and circulating, the water of condensation 4 that produces in the condensation process is collected to be sent, promptly required fresh water (finished product water); Saliferous solion 2-1, carry out heat exchange through heat exchanger a and discharge salts solution 2-6, salts solution 2-2 after the formation heat exchange enters the evaporation channel of condensation and vaporizer B, salts solution 2-2 spray passes through vaporizer, on the one hand, it absorbs the heat of condensation from the opposite side condensation channel, and temperature raises, the part evaporation, and taken away by countercurrent flow in the same passage and same heated wet air 3-2, the unevaporated water branch falls into kerve together with salt, on the other hand, the hot and humid gas 3-4 temperature of passing through in the vaporizer opposite side condensation channel is reduced, the portion water vapour condensation, output water of condensation 4 (being fresh water) is emitted heat, falls into kerve, solution 2-3 is divided into two portions after pump e pressurization, part solution 2-3-1 repeats spray through flowrate control valve v, forms self-circulation in condensation and the vaporizer; Another part solution 2-3-2 carries out heat exchange through the cationic salts solution 2-6 of high density that contains of heat exchanger b and discharge, saline solns 2-4 after the intensification is through heat exchanger c, enter heating fumigators A spray, fall into kerve, saline solns 2-5 is divided into two portions after pump f pressurization, part solution 2-5-2 repeats spray through flowrate control valve v, forms self-circulation in the vaporizer A; Another part solution 2-5-1, successively through flowrate control valve v, heat exchanger b and solution 2-3-2,2-1 carry out heat exchange, reclaim heat, and last, Dan Hua salts solution 2-7 is not discharged from, and can circulate once more and desalinate.
In aforesaid method and working process, by pipeline UNICOM, constitute the recycle system between said heat exchanger a, b, c, blower fan d, control valve v and heating fumigators A, condensation and vaporizer B; Said hot-fluid 1-1 is various waste heats, sun power, heat pump or other thermals source; The salts solution 2-2 of said saliferous solion 2-1 or spray is seawater, bittern water, and the evaporation channel of said condensation and vaporizer B is fin tube type or naked pipe formula or partition channel-type, or other interchanger.
Fig. 4 has provided a kind of heating fumigators structure, and Fig. 5, Fig. 6 have provided the condensation and the evaporation structure of two kinds of structures.By shown in Figure 4, heating fumigators A is equipped with finned tube 5 in shell 10, evaporation channel 7 is arranged between finned tube, and zone of heat liberation 8 is arranged in the finned tube, and spray header 9 is arranged above the finned tube, and tank 13 is arranged at the bottom in the shell, and import 11 and outlet 12 are arranged on the two lateral walls; Condensation shown in Figure 5 is identical with Steaming structure shown in Figure 4 with vaporizer B, be condensation channel 6 in the different just finned tubes, another kind of condensation shown in Figure 6 is identical with vaporizer B and basic structure shown in Figure 5, just finned tube 16, condensation channel 14, evaporation channel 15 are different on structure formation, its function is the same with effect, no longer repeats.
By above-mentioned working condition as can be seen, the inventive method, its principal character is that the recovery of heat of condensation in condensation and the vaporizer is carried out with while mass-and heat-transfer form, that is: emit heat of condensation in the condensation channel, in the opposite side evaporation channel, the seawater (or other solution) and the recirculated air of countercurrent flow of spray are heated simultaneously, make full use of latent heat, damp and hot conversion, make that moisture content desalination evaporation---the air saturation process is fully carried out.The forming process of fresh water is to realize that by saturated air latent heat, damp and hot mutual conversion under the different condition considerable part heat is recycled recycling.
Figure 1 shows that the technical process of double flash evaporation and condensation, it is divided into the thermal source workflow, air (water evaporation and cooling) cycle operation flow process and saliferous solion flow process three parts, wherein thermal source is 1 (by the heat source body 1-1 of different steps, 1-2,1-3 constitutes), air is 3 (by the gas 3-1 of different steps, 3-2,3-3,3-4,3-5 constitutes), saliferous from solution be 2 (by the saline solns 2-1 of different steps, 2-2,2-3,2-4,2-6,2-7,2-3-1,2-3-2,2-5-1, the 2-5-2 formation) desalination water is 4 (water of condensation after promptly desalting), and bottom describes it in detail to three part flow processs again:
The heat source fluid working process:
Hot-fluid 1-1 enters heating fumigators A, through fin tube type (or naked pipe, plate change etc. other) interchanger, emit heat, with the solution 2-5-2 of opposite side, from the next salt solution 2-4 of upper level, and with the wet air 3-3 heating of spray countercurrent flow, warm air 3-4 after part water evaporates after being heated and quilt heat up takes away, and the unevaporated water of part and other salinities etc. fall into kerve; Hot-fluid 1-2 after the heat release preheats salt solution 2-4, the wet air 3-2 that sprays through over-heat-exchanger c, emits part heat after heat fluid 1-3 and returns thermal source.
Wet air (evaporation and condensation) cycle operation process:
By the low temperature saturated moist air 3-1 that blower fan d comes, flow through condensation and vaporizer B (fin tube type) evaporation channel, the wet air 3-2 behind the warming and humidifying through heat exchanger c, is further heated humidification solution 3-3, enters heating fumigators A.The hot and humid gas 3-4 that forms behind the warming and humidifying, enter condensation and vaporizer B condensation channel, cooled off by opposite side spray solution 2-3-1, low temperature wet air 3-1, lose water of condensation 4, emit heat of condensation, the saturated air 3-5 after temperature reduces is through blower fan d, return work, form airtight complete cycle.
Send output finished product water after the water of condensation 4 of output (being fresh water) is collected in the condensation process.
Saliferous solion (former water) flow process:
Saliferous solion 2-1, carry out heat exchange through heat exchanger a and discharge salts solution 2-6, form the evaporation channel that salts solution 2-2 enters condensation and vaporizer B, saline solns 2-2 spray is by condensation and vaporizer B, and on the one hand, it absorbs the heat of condensation from the opposite side condensation channel, temperature raises, part is evaporated, and is taken away by countercurrent flow in the same passage and same heated wet air 3-2, and the unevaporated water branch falls into kerve together with salinity.On the other hand, the hot and humid wet air 3-4 temperature of passing through in condensation and the vaporizer B opposite side condensation channel is reduced, the portion water vapour condensation, output water of condensation 4 (being fresh water) is emitted heat.
Fall into kerve solution 2-3 and be divided into two portions after pump e pressurization, a part of solution 2-3-1 repeats spray through flowrate control valve v, forms self-circulation in the level; Another part solution 2-3-2 carries out heat exchange through the cationic salts solution 2-6 of high density that contains of heat exchanger b and discharge, and the salt solution 2-4 over-heat-exchanger c spray after the intensification enters heating fumigators A afterwards.
Enter the salt solution 2-4 spray of heating fumigators A, fall into kerve through vaporizer, solution 2-5 is divided into two portions after pump f and pressurization, and a part of solution 2-5-2 repeats spray through flowrate control valve v, forms self-circulation in the device; Another part solution 2-5-1 carries out heat exchange through heat exchanger b and solution 2-3-2,2-1 successively, reclaims heat, and last, solution 2-7 is discharged from.
The present invention has good result of use, under 72 ℃ of thermal source conditions of temperature:
4% salt solution 2-1 is with 28 ℃ of the salts solution 2-2 temperature rises of 60kg/h flow, 25 ℃ of over-heat-exchanger a, enter condensation and vaporizer, solution 2-3 temperature rise to 49 ℃ behind evaporation channel, solution 2-3-2 over-heat-exchanger b, the solution 2-4 of temperature rise to 51 ℃, enter heat exchanger c spray, temperature rise to 58 ℃ enters vaporizer A, crosses the solution 2-5 that interchanger is warming up to 65 ℃, part solution 2-5-2 continues the spray circulation, another part solution 2-5-1 is successively through heat exchanger b, a, and temperature drop to 38 ℃ is drained.
Enter the evaporation channel of condensation and vaporizer from the next cold cycle saturated air 3-1 of blower fan d, warming and humidifying to 49 ℃ saturated air 3-2, over-heat-exchanger c is heated the hot moisture 3-3 that humidification is saturated to 55 ℃ and enters vaporizer A, be heated humidification to 68 ℃ saturated hot and humid gas 3-4, the condensation channel of return condensed and vaporizer after losing part moisture content and emitting heat of condensation, forms 37 ℃ of saturated air 3-5, cross blower fan, form circulation.
72 ℃ of thermal source 1-1 enter vaporizer A, and hot-fluid 1-2 temperature is 66 ℃ after the heat release, and over-heat-exchanger c returns thermal source, form circulation.
With this understanding, fresh water yield 42kg/h, power consumption 0.16kwh.1.91 yuan of ton water power consumption costs.
95 ℃ of thermals source of temperature are:
Only improve heat source temperature to 95 ℃, strengthen the salt solution feed rate to 400kg/h, other conditions are constant, can produce fresh water 289kg/h.Power consumption 0.16kwh.0.28 yuan of ton power consumption cost.
So condensation shown in Figure 2 and vaporizer B exist:
Evaporation side---the salt solution (or containing other positively charged ions) that comes from the external world carries out heat exchange earlier with the high cation solution that finally dumps, the high cation solution heat that recovery dumps, after the intensification, enter condensation and vaporizer, through solution pump pressurization spray, directly contact with the low temperature saturated air of countercurrent flow, over-heat-exchanger, on the one hand, salts solution and Cryogenic air are come the interchanger opposite side simultaneously from heating fumigators hot and humid air cooling, make hot and humid air themperature reduce, lose part moisture, emit heat of condensation simultaneously.On the other hand, salts solution and Cryogenic air absorb the heat of condensation that the hot and humid saturated air of vaporizer opposite side is emitted, and temperature raises, and the air after part water evaporates and quilt heat up is taken away.The salts solution that loses part moisture content falls into kerve, pressurizes through solution pump.Solution after the pressurization, a part of circulated sprinkling, another part is sent to next stage, forms complete cycle.
Condensation side---during from the hot and humid saturated of heating fumigators or near saturated wet air process condensation and vaporizer, by the hypothermic saline of opposite side and wet air cooling, temperature reduces, and loses entrained most of moisture content, emit heat of condensation simultaneously, become the low temperature saturated moist air.This low humidity saturated moist air enters interchanger opposite side at the corresponding levels after the blower fan pressurization, converge with the salt solution that comes from the external world, forms complete closed cycle.
So heating fumigators A shown in Figure 3 exists:
The extraneous heat energy that provides is provided, will heats (its working process and condensation and vaporizer are basic identical, and distinguishing what be that the interchanger high temperature side passes through is the thermal source that the external world provides) simultaneously from condensation and salt solution and the Cryogenic air that vaporizer comes.After being heated, salt solution and air themperature raise, and salt solution heats up, the part water evaporates, and taken away by the warm air of countercurrent flow, warm air reaches capacity or near saturated, enters condensation and evaporator condensation side, the temperature reduction, dry out, emit heat, form complete cycle.
As required, heating evaporation and condensation and evaporation can be single-stages in the said process, also can be that two-stage or two-stage are above.
In the system of the present invention, the carrier that water evaporates and condensation cycle are carried out is an air, is characterized in that sealing is carried out in the whole process.
Technology of the present invention is simple, carries out under the whole process atmospheric pressure environment, and the energy is efficiently utilized.Both be fit to seawater, brackish water is produced fresh water, also is fit to produce soft water, also can be used for various solution desalinations, dehydration concentrates.Of the present invention applying is inexhaustible sea water desaltination, satisfies the needs of people's production and life and opens up wide road, will be to make huge creative contribution for class.
Claims (6)
1, the desalting method that a kind of non-boiling evaporation and condensation classification cycle are carried out, it is characterized in that, hot-fluid (1-1) enters from the evaporation side of heating fumigators (A), through heat exchange, emit heat, the spray salt solution (2-5-2) of upside, from the next salt solution (2-4) of upper level, and with the wet air (3-3) of spray countercurrent flow simultaneously through heating fumigators (A), hot and humid gas (3-4) after the rear section water evaporates of being heated and quilt heat up is taken away, the unevaporated salt solution of part and other salts fall into kerve, realize that water salt separates, hot-fluid after the heat release (1-2) is through heat exchanger (c), salt solution (2-4) with spray from upper level, wet air (3-2) carries out preheating, after emitting the part heat, hot-fluid (1-3) returns thermal source; The hot and humid gas (3-4) that heating fumigators (A) is sent, enter the condensation channel of condensation and vaporizer (B), be condensed and vaporizer (B) opposite side spray solution (2-3-1), low temperature saturated moist air (3-1) cooling, lose water of condensation (4), emit heat of condensation, saturated air (3-5) after temperature reduces, (d) returns through blower fan, by the next low temperature saturated moist air (3-1) of blower fan (d), the flow through evaporation channel of condensation and vaporizer (B), wet air behind the warming and humidifying (3-2), hot wet air (3-3) after heat exchanger (c) is further heated humidification enters vaporizer (A), form sealing and circulating, the water of condensation that produces in the condensation process (4) is collected to be sent; Saliferous solion (2-1), carry out heat exchange through heat exchanger (a) and discharge salts solution (2-6), salts solution (2-2) after the formation heat exchange enters the evaporation channel of condensation and vaporizer (B), salts solution (2-2) spray passes through vaporizer, on the one hand, it absorbs the heat of condensation from the opposite side condensation channel, temperature raises, and part is evaporated, and is taken away by countercurrent flow in the same passage and same heated wet air (3-2), the unevaporated water branch falls into kerve together with salt, on the other hand, make hot and humid gas (3-4) temperature of passing through in the vaporizer opposite side condensation channel reduce the portion water vapour condensation, output water of condensation (4), emit heat, fall into kerve solution (2-3) and be divided into two portions after pump (e) pressurization, a part of solution (2-3-1) through flowrate control valve (v), repeat spray, form self-circulation in the device; Another part solution (2-3-2) carries out heat exchange through heat exchanger (b) and the cationic salts solution of high density (2-6) that contains of discharging, saline solns after the intensification (2-4) is through heat exchanger (c), enter heating fumigators (A) spray, fall into kerve, saline solns (2-5) is divided into two portions after pump (f) pressurization, part solution (2-5-2) (v), repeats spray, forms self-circulation in the device through flowrate control valve; Another part solution (2-5-1), successively through flowrate control valve (v), heat exchanger (b) and solution (2-3-2), (2-1) carry out heat exchange, reclaims heat, last, Dan Hua salts solution (2-7) is not discharged from.
2, the desalting method that a kind of non-boiling evaporation according to claim 1 and condensation classification cycle are carried out, it is characterized in that, the recovery of heat of condensation is carried out with while mass-and heat-transfer form in said condensation and the vaporizer, that is: emit heat of condensation in the condensation channel, in the opposite side evaporation channel, the seawater of spray and the recirculated air of countercurrent flow are heated simultaneously, make full use of latent heat, damp and hot conversion, make that moisture content desalination evaporation---the air saturation process is fully carried out, the forming process of fresh water is by saturated air latent heat, damp and hot mutual conversion realizes that heat is recycled recycling.
3, a kind of non-boiling according to claim 1 evaporates the desalting method that carries out with the condensation classification cycle, it is characterized in that said evaporation and condensation process are single-stages, or forms by two-stage or more than the two-stage.
4, a kind of non-boiling according to claim 1 evaporates the desalting method that carries out with the condensation classification cycle, it is characterized in that said thermal source is various waste heats or sun power, or heat pump or other thermals source.
5, a kind of non-boiling according to claim 1 evaporates the desalting method that carries out with the condensation classification cycle, it is characterized in that said condensation and evaporation channel are fin tube type or naked pipe formula or partition channel-type, or other interchanger.
6, a kind of non-boiling according to claim 1 evaporates the desalting method that carries out with the condensation classification cycle, it is characterized in that, said vaporizer (A) or condensation and its structure of vaporizer (B) are that finned tube (5) is housed in the shell (10), evaporation channel (7) is arranged between finned tube, zone of heat liberation (8) or condensation channel (6) are arranged in the finned tube, spray header (9) is arranged above the finned tube, and tank (13) is arranged at the bottom in the shell, and import (11) and outlet (12) are arranged on the two lateral walls.
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| CNB2004100605636A CN1329309C (en) | 2004-10-10 | 2004-10-10 | Desalinization method by stepwise circulation of non-explosive evaporation and condensation |
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| CNB2004100605636A CN1329309C (en) | 2004-10-10 | 2004-10-10 | Desalinization method by stepwise circulation of non-explosive evaporation and condensation |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103241786B (en) * | 2013-05-22 | 2014-11-05 | 北京万邦达环保技术股份有限公司 | Evaporation system |
| CN103553166A (en) * | 2013-11-14 | 2014-02-05 | 天津辰创环境工程科技有限责任公司 | Device and method of treating wastewater with high salt content by utilizing waste heat of circulating water |
| US20170007942A1 (en) * | 2014-01-31 | 2017-01-12 | Solaquagen International Limited | Counter current liquid gas evaporation and condensation apparatus with fragmentation plates |
| CN104649493A (en) * | 2014-12-29 | 2015-05-27 | 北京特里高膜技术有限公司 | Method and system for treating high-concentration wastewater by virtue of low-temperature evaporative crystallization |
| CN106166394B (en) * | 2016-08-26 | 2018-10-30 | 汩蓝环保科技（上海）有限公司 | It humidifies dehumidification system and applies its distillating method |
| CN107585936B (en) * | 2017-09-22 | 2022-02-15 | 北京万邦达环保技术股份有限公司 | Zero-emission treatment process and device for high-salinity wastewater |
| CN108423910A (en) * | 2018-05-17 | 2018-08-21 | 北京今大禹环境技术股份有限公司 | A kind of processing system for realizing high organic wastewater zero-emission with high salt using waste heat |
| CN108626817A (en) * | 2018-05-17 | 2018-10-09 | 北京今大禹环境技术股份有限公司 | A kind of technique of Hot wet air heating waste heat recovery |
| CN111661888B (en) * | 2020-06-15 | 2022-07-05 | 方诺传热系统(江苏)有限公司 | Falling film type air cooler based on evaporative air cooling technology and wastewater treatment process |
| CN112919718A (en) * | 2021-03-29 | 2021-06-08 | 山东建筑大学 | Low-temperature normal-pressure double-effect high-salinity wastewater evaporation device and treatment method |
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| JPS4848380A (en) * | 1971-10-04 | 1973-07-09 | ||
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| CN1408647A (en) * | 2001-09-25 | 2003-04-09 | 袁一军 | Process for producing fresh water by brine desalination |
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