CN102205993B - Adverse current closed type multistage seawater desalination system and method - Google Patents
Adverse current closed type multistage seawater desalination system and method Download PDFInfo
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- CN102205993B CN102205993B CN201110066208XA CN201110066208A CN102205993B CN 102205993 B CN102205993 B CN 102205993B CN 201110066208X A CN201110066208X A CN 201110066208XA CN 201110066208 A CN201110066208 A CN 201110066208A CN 102205993 B CN102205993 B CN 102205993B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
- Y02A20/124—Water desalination
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
- Y02A20/124—Water desalination
- Y02A20/138—Water desalination using renewable energy
- Y02A20/142—Solar thermal; Photovoltaics
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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
- Y02A20/20—Controlling water pollution; Waste water treatment
- Y02A20/208—Off-grid powered water treatment
- Y02A20/212—Solar-powered wastewater sewage treatment, e.g. spray evaporation
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Abstract
The invention relates to an adverse current closed type multistage seawater desalination system and a method, the adverse current closed type multistage seawater desalination system comprises a multistage heat exchanger containing heat exchange tubes in series step by step. An inlet of a heat exchange tube of a first stage heat exchanger is connected with an inlet pipe through a sea water pump, a heat exchange tube of a last stage heat exchanger is connected with a seawater heating device; the seawater heating device is connected with several spray head arranged at the top in a spray tower through pipelines, a communicated multistage spray tower is formed by multistage filling materials in the spray tower, evaporation space of each stage filling material is respectively connected with the corresponding top of heat exchanger though the other end of a vapor pipe, the bottom of each stage heat exchanger is respectively connected in parallel with a fresh water collecting pipe through a pipeline, a breather pipe is inserted at the bottom of each stage heat exchanger, the breather pipe at the bottom of the next stage heat exchanger is respectively communicated with the top of the cylindrical shell of the preceding stage heat exchanger, the breather pipe at the bottom of the first stage heat exchanger is connected with the lower part of the last stage spray tower through a steam return, the bottom of the last stage heat exchanger is connected with a discharge pipe of sprayed sea water. According to the invention, the water volume and the efficiency of producing water can be effectively enhanced.
Description
Technical field
The present invention relates to a kind of seawater desalination system and method, particularly about a kind of adverse current closed type multistage seawater desalination system and method.
Background technology
The main method of at present sea water desaltination comprises thermal separation method, embrane method and chemical process etc., and wherein thermal separation method is had relatively high expectations to temperature; Embrane method be by the pressurization so that water molecules obtains fresh water by semi-permeable membranes, the method is had relatively high expectations to pressure; Chemical process then is to utilize ion-exchange or form the modes such as hydrate to isolate fresh water in the seawater, but power consumption is higher.Equally, utilizing the condensation process of the caloic exchange process of air and seawater and wet air to separate out fresh water also is a kind of method that desalinizes seawater.In the method, on the one hand, air and water (or salts solution) are when directly contacting, because the temperature difference can cause heat transfer, because the difference of steam partial pressure can cause the transmission of moisture, until temperature and water vapour all reach balance.On the other hand, when continuing by cooling after air cooling-down reaches capacity state, airborne water vapour will undergo phase transition, and steam coagulation becomes liquid water and separates out.Owing to there is the transmitting characteristic of above-mentioned two aspects between air and the water (or salts solution), just can utilize air to realize " carrying " of moisture---that utilizes air and water (or salts solution) directly contacts to take away moisture, and the steam coagulation in the recycling wet air obtains moisture.Because seawater can be regarded as the salts solution with low concentration, also just can utilize air and seawater direct contact and the condensation of wet air with the moisture in the seawater " carrying " out, namely can realize the desalination of seawater.
The device that utilizes air " carrying " moisture to carry out sea water desaltination has occurred, such as: the patent No. is that the Chinese patent of ZL94216279.X discloses a kind of cryogenic sea water desalting plant, it is to utilize heated air and contact with sea water that moisture in air content is increased, and again the air setting behind the humidification is obtained fresh water.This device is to air heating rather than to heating of seawater, and the caloic exchange process that air and seawater are directly contacted is restricted, and can not reach optimum caloic exchange effect.The patent No. is that the Chinese patent of ZL200610111779.X discloses a kind of temperature-differential sea-water distillator, and it is the device that the different designs according to saturated steam partial pressure in the air under the differing temps goes out to utilize air to obtain moisture and separate out at low temperatures pure water under hot environment from seawater.The limitation of this device is that the spray chamber contact area that air and seawater directly contact is limited, and the caloic exchange process of air and seawater can't fully carry out.The patent No. is that the Chinese patent of ZL200310107193.2 discloses a kind of spray heat-exchange type seawater desalination machine, it is to utilize the heat pump condenser heating seawater, air increases by moisture content after contacting with high temperature seawater, and wet air is separated out fresh water with the evaporator with heat pump side contacts again.The limitation of this device is that air is open cycle, and the low temperature saturated air of separating out behind the moisture is not utilized.The patent No. is that the Chinese patent of ZL200620078403.9 discloses a kind of enclosed sun power or low-temperature heat source sea water desalinating plant (as shown in Figure 4), seawater after air heats with process carries out the caloic exchange in spray equipment, entered condensing works by the air behind the humidification and separate out fresh water, air is closed cycle.Contact form in this device Air and the high temperature seawater spray process is the distributary flow pattern, has limited the effect of air and seawater caloic exchange.
Summary of the invention
For the problems referred to above, it is high to the purpose of this invention is to provide a kind of fresh water organic efficiency, can realize largely adverse current closed type multistage seawater desalination system and the method for the coupling of the exchange of air and seawater caloic and heat transfer process.
For achieving the above object, the present invention takes following technical scheme: a kind of adverse current closed type multistage seawater desalination system, it is characterized in that: it comprises the multi-stage heat exchanger that heat transfer tube is connected step by step, the import of the described heat exchanger heat-exchanging tube of the first step connects the seawater water inlet pipe by a sea-water pump, and the described heat exchanger heat-exchanging tube of last step connects a heating of seawater device; Described heating of seawater device connects some spray headers that a spray column inner top arranges by pipeline, be provided with the multistage filler in the described spray column and form the multi-stage spray tower that is communicated with, the evaporating space of the described filler of each section top connects respectively a vapour pipe, and the other end of each described vapour pipe connects respectively the cylindrical shell top of a corresponding described interchanger; The cylinder body bottom of the described interchanger of every one-level is respectively by the pipeline fresh water collecting pipe that is connected in parallel, the cylinder body bottom of the described interchanger of every one-level also wears respectively a ventpipe, the inlet end of the described ventpipe of every one-level all is higher than this grade cylinder body bottom, and the described ventpipe of the described interchanger of rear one-level bottom is communicated with respectively the cylindrical shell top of the described interchanger of upper level, the ventpipe of first step interchanger bottom connects last step spray column bottom by a muffler, and the bottom of described last step spray column connects a sprayed sea water vent pipe.
Between described sprayed sea water vent pipe and seawater water inlet pipe, a variable valve is set.
Described heating of seawater device is a solar energy heat collector.
Described heating of seawater device is heat pump circulating system.
The condenser of described heat pump circulating system is arranged on the pipeline between the described heat exchanger heat-exchanging tube water outlet of described last step and the first step spray column water-in, the vaporizer of described heat pump circulating system, be arranged on by a throttling valve on the vent pipe of described sprayed sea water, described vaporizer is provided with a compressor to the pipeline between the condenser, described condenser is provided with an expansion valve to the pipeline between the vaporizer.
The condenser of described heat pump circulating system is arranged on the pipeline between the described heat exchanger heat-exchanging tube water outlet of described last step and the first step spray column water-in, the vaporizer of described heat pump circulating system is arranged on the described muffler, and described base of evaporator connects described fresh water collecting pipe by a pipeline; Described vaporizer is provided with a compressor to the pipeline between the condenser, described condenser is provided with an expansion valve to the pipeline between the vaporizer.
A kind of adverse current closed type multistage method for desalting seawater that adopts said apparatus, it is characterized in that: multistage seawater and air are set directly contact the interchanger that the spray column that carries out the caloic exchange and multistage seawater and air directly do not contact, high temperature seawater and Cryogenic air adverse current in spray column is carried out heat and mass transfer, air is through the caloic exchange temperature, after water capacity all raises, enter again in the interchanger and carry out countercurrent flow with seawater, the part steam coagulation is separated out in the air, obtain fresh water, air after the heat exchange reenters spray column, finish the closed cycle process of air, behind the seawater outflow heat exchanger, enter the spray column spray after being heated by heating unit again.
The seawater part that flows out from described spray column is inflow heat exchanger again, the circulation desalination process of sustainable participation seawater.
Utilize sun power as the heating of seawater device.
Utilize the condenser heating seawater of heat pump circulating system, the seawater that the evaporator cools of utilizing heat pump circulating system flows out from spray column, or the low temperature saturated air that flows out from interchanger.
The present invention is owing to take above technical scheme, it has the following advantages: 1, because air of the present invention and seawater all adopt reflux type to carry out caloic exchange and heat exchange in spray column and interchanger, air adopts the closed cycle process in system simultaneously, therefore can realize more excellent heat, mass transfer effect.2, because the present invention arranges multi-stage spray tower and interchanger dexterously in working cycle, realize as far as possible thermal capacity coupling between wet air and the seawater by changing air flow quantity in interchanger not at the same level or the spray column, such as: when the wet air temperature in certain grade of spray column or the interchanger is higher, its equivalent specific heat holds larger, and the flow of air can be corresponding less; When the wet air temperature in certain grade of spray column or the interchanger was low, its equivalent specific heat held less, and the flow of air can be corresponding larger.3, because of the present invention this multistage and change step by step the setting of the air of air flow quantity-seawater spraying tower and interchanger, can realize as far as possible the thermal capacity coupling of air and seawater caloic exchange process and heat transfer process, therefore the present invention has reached more excellent heat and mass effect, has effectively improved the water production rate of sea water desaltination and has produced water efficient.
Description of drawings
Fig. 1 is the structural representation of the embodiment of the invention 1
Fig. 2 is the structural representation of the embodiment of the invention 2
Fig. 3 is the structural representation of the embodiment of the invention 3
Fig. 4 is the prior art structural representation
Embodiment
Below in conjunction with drawings and Examples the present invention is described in detail.
Principle of design of the present invention is embodied in: at first be provided with multistage independently air-seawater spraying tower (hereinafter to be referred as spray column) and multi-staged air-seawater heat exchanger (hereinafter to be referred as interchanger), utilize seawater and the air adverse current caloic exchange process in spray column and the countercurrent flow process in interchanger to prepare fresh water.Next is considered if seawater temperature higher (such as 80 ℃) when spraying from the spray column entrance, temperature lower (such as 20 ℃) during to heat exchanger entrance, and namely water temperature changes greatly, and the range of temperature of air is also larger so; And when air temperature variations was larger, it is little that the specific heat capacity of seawater changes, and the equivalent specific heat of damp-heat air holds and can have greatly changed, and the equivalent specific heat of damp-heat air appearance was larger when temperature was high, and the equivalent specific heat of damp-heat air held less when temperature was low; The present invention utilizes in the working cycle seawater flow in the spray column and interchanger substantially constant, and in spray column not at the same level and the different principle of interchanger Air flow, realize that as much as possible air and seawater are in the thermal capacity coupling of caloic exchange process and heat transfer process, exchange or heat transfer effect to obtain better air and seawater caloic, and then improve the efficient of sea water desaltination.The below only is illustrated as an example of the system that is provided with three grades of interchanger and three grades of spray columns example, and in the multistage seawater desalination system of reality, the progression of interchanger and spray column can change to some extent.
Embodiment 1:
As shown in Figure 1, present embodiment comprises first step interchanger 1, second stage interchanger 2 and third stage interchanger 3, and first step spray column 4, second stage spray column 5 and third stage spray column 6.Three grades of interchanger 1,2,3 heat transfer tube series connection, the heat exchange tube inlet of first step interchanger 1 connects a seawater water inlet pipe 7, is provided with a sea-water pump 8 on the seawater water inlet pipe 7; The heat transfer tube outlet of third stage interchanger 3 connects a solar energy heat collector 9 by pipeline, some spray headers 10 that the outlet of solar energy heat collector 9 arranges by pipeline connection first step spray column 4 inner tops.Three grades of spray columns 4,5,6 are communicated with, and are provided with 11, three sections filler 11 tops of one section filler in every one-level spray column and leave respectively evaporating space, and each evaporating space connects a vapour pipe 12.The other end of three grades of spray columns 4, three vapour pipes 12 of 5,6 connects respectively and the interchanger 3,2 of its respective row column position, 1 cylindrical shell top.By the pipeline fresh water collecting pipe 13 that is connected in parallel, fresh water collecting pipe 13 connects fresh water collecting container (not shown)s respectively for three grades of interchanger 1,2,3 cylinder body bottom.Three grades of interchanger 1,2,3 cylinder body bottom are equipped with respectively a ventpipe, and the inlet end of each ventpipe protrudes from respectively this grade cylinder body bottom certain altitude, in order to only there is gas to enter, desalination water can not enter.Three, the ventpipe of second stage interchanger 3,2 bottoms is communicated with respectively next stage interchanger 2,1 cylindrical shell top, the ventpipe of first step interchanger 1 bottom connects third stage spray column 6 bottoms by a muffler 14, and the bottom of third stage spray column 6 connects a sprayed sea water vent pipe 15.
In above-described embodiment, because entering seawater in the system of the present invention need to carry out some and in earlier stage process, the cost of processing in order to save early stage, the seawater that a part can be flowed out sprayed sea water vent pipe 15 sends back to the working cycle that the 7 interior sustainable participation desalinations of seawater water inlet pipe are extracted again by a variable valve 16, and the seawater amount that specifically enters systemic circulation can be regulated as required.In addition, filler of the present invention is selected common regular type filler, and filler can by wetting from the high temperature seawater of spray header 10 ejections, effectively increase the heat and mass area of low temperature saturated air and high temperature seawater.
During present embodiment work, enter the low temperature seawater of seawater water inlet pipe 7 by sea-water pump 8, three grades of interchanger 1 through being connected in series, 2,3 heat transfer tube upwards flow into solar energy heat collector 9, carry out countercurrent flow with the damp-heat air that enters downward motion in interchanger 1 at different levels, 2,3 cylindrical shells simultaneously; The seawater that enters solar energy heat collector 9 is heated as high temperature seawater, each spray header 10 that arranges by first step spray column 4 inner tops sprays, successively through three grades of spray columns 4,5,6, flow out from the spray sea vent pipe 15 of third stage spray column 6 bottoms, high temperature seawater carries out the exchange of countercurrent heat-transfer mass transfer with the low temperature saturated air that upwards flows from three grades of spray columns 6,5,4 bottoms simultaneously; Heat steam enters in corresponding interchanger 3,2,1 the cylindrical shell by each vapour pipe 12, and condenses into fresh water behind the seawater to make heat exchange in the heat transfer tube, enters in the fresh water collecting pipe 13 rear inflow fresh water collecting containers by loop.Three, the steam that does not condense into water in the secondary heat exchanger 3,2 then enters next collecting exchanger 2,1 successively by ventpipe, get back to the third stage spray column 6 from the bottom inflow muffler 14 of first step interchanger 1 at last, continue in system, to carry out closed circulation.Part from the sprayed sea water that sprayed sea water vent pipe 15 flows out can be got back to seawater water inlet pipe 7 by variable valve 16 and be continued to circulate in system.
Embodiment 2:
As shown in Figure 2, present embodiment is identical with the basic setup of embodiment 1, and its difference is: the heating of seawater device is different, and it is provided with the conventional heat pump circulating system 20 of a cover to replace solar heating system 9.This heat pump circulating system 20 comprises: be arranged on third stage interchanger 3 heat transfer tube water outlets, and first step spray column 4 water-ins between a condenser 21 on the pipeline, be arranged on the vaporizer 22 on the sprayed sea water vent pipe 15, be provided with a compressor 22 at vaporizer 21 to the pipeline between the condenser 23, be provided with an expansion valve 24 at condenser 21 to the pipeline between the vaporizer 22.
During present embodiment work, two countercurrent flow processes are identical with embodiment 1, its difference is: the seawater that flows out from third stage interchanger 3 heat transfer tube water outlets is to enter condenser 21, heat by the refrigeration working medium heat release in the condenser 21, then enter the spray header 10 of first step spray thrower 4; Simultaneously, directly discharge via pipeline by a throttling valve (not shown) part from the spray water that third stage spray thrower 6 flows out, another part seawater then flows through vaporizer 22, after cooling off by the heat absorption of the refrigeration working mediums in the vaporizer 22, enter again seawater water inlet pipe 7 by sprayed sea water vent pipe 15, variable valve 16 and participate in systemic circulation.
Embodiment 3:
As shown in Figure 3, present embodiment is substantially the same manner as Example 2, also be provided with the conventional heat pump circulating system 20 of a cover, its difference from Example 2 is: vaporizer 22 is not arranged on the sprayed sea water vent pipe 15, and be arranged on the muffler 14 between first step interchanger 1 bottom and third stage spray column 6 bottoms, and be connected in parallel to fresh water collecting pipe 13 in vaporizer 22 bottoms by pipeline.
In present embodiment when work,, what only be that vaporizer 22 absorbs from embodiment 2 different is heat the Low Temperature Wet warm air in first step interchanger 1 enters third stage spray column 6.
Can be found out by above-mentioned three embodiment: embodiment 1 utilizes sun power as the heating of seawater device, and it relatively is suitable for the well-off occasion of sun power.Embodiment 2,3 utilizes condenser in the conventional heat pump circulating system as the heating of seawater device; it is sufficient not that it relatively is suitable for the sun power supply; and the utilizable occasion of industrial exhaust heat is arranged; thereby for enforcement of the present invention provides multiple possible mode; certainly the present invention does not get rid of in addition other mode that can implement, and the proposition of these modes should not got rid of outside protection scope of the present invention.
The various embodiments described above only are used for explanation the present invention, and wherein the structure of each parts, mode of connection etc. all can change to some extent, and every equivalents and improvement of carrying out on the basis of technical solution of the present invention all should do not got rid of outside protection scope of the present invention.
Claims (9)
1. adverse current closed type multistage seawater desalination system, it is characterized in that: it comprises the multi-stage heat exchanger that heat transfer tube is connected step by step, the import of the described heat exchanger heat-exchanging tube of the first step connects the seawater water inlet pipe by a sea-water pump, and the described heat exchanger heat-exchanging tube of last step connects a heating of seawater device; Described heating of seawater device connects some spray headers that a spray column inner top arranges by pipeline, be provided with the multistage filler in the described spray column and form the multi-stage spray tower that is communicated with, the evaporating space of the described filler of each section top connects respectively a vapour pipe, and the other end of each described vapour pipe connects respectively the cylindrical shell top of a corresponding described interchanger; The cylinder body bottom of the described interchanger of every one-level is respectively by the pipeline fresh water collecting pipe that is connected in parallel, the cylinder body bottom of the described interchanger of every one-level also wears respectively a ventpipe, the inlet end of the described ventpipe of every one-level all is higher than this grade cylinder body bottom, and the described ventpipe of the described interchanger of rear one-level bottom is communicated with respectively the cylindrical shell top of the described interchanger of upper level, the ventpipe of first step interchanger bottom connects last step spray column bottom by a muffler, and the bottom of described last step spray column connects a sprayed sea water vent pipe.
2. a kind of adverse current closed type multistage seawater desalination system as claimed in claim 1 is characterized in that: between described sprayed sea water vent pipe and seawater water inlet pipe a variable valve is set.
3. a kind of adverse current closed type multistage seawater desalination system as claimed in claim 1 or 2, it is characterized in that: described heating of seawater device is a solar energy heat collector.
4. a kind of adverse current closed type multistage seawater desalination system as claimed in claim 1 or 2, it is characterized in that: described heating of seawater device is heat pump circulating system.
5. a kind of adverse current closed type multistage seawater desalination system as claimed in claim 4, it is characterized in that: the condenser of described heat pump circulating system is arranged on the pipeline between the described heat exchanger heat-exchanging tube water outlet of described last step and the first step spray column water-in, the vaporizer of described heat pump circulating system, be arranged on by a throttling valve on the vent pipe of described sprayed sea water, described vaporizer is provided with a compressor to the pipeline between the condenser, described condenser is provided with an expansion valve to the pipeline between the vaporizer.
6. a kind of adverse current closed type multistage seawater desalination system as claimed in claim 4, it is characterized in that: the condenser of described heat pump circulating system is arranged on the pipeline between the described heat exchanger heat-exchanging tube water outlet of described last step and the first step spray column water-in, the vaporizer of described heat pump circulating system is arranged on the described muffler, and described base of evaporator connects described fresh water collecting pipe by a pipeline; Described vaporizer is provided with a compressor to the pipeline between the condenser, described condenser is provided with an expansion valve to the pipeline between the vaporizer.
7. adopt as claimed in claim 1 or 2 a kind of adverse current closed type multistage method for desalting seawater of device, it is characterized in that: multistage seawater and air are set directly contact the interchanger that the spray column that carries out the caloic exchange and multistage seawater and air directly do not contact, high temperature seawater and Cryogenic air adverse current in spray column is carried out heat and mass transfer, air is through the caloic exchange temperature, after water capacity all raises, enter again in the interchanger and carry out countercurrent flow with seawater, the part steam coagulation is separated out in the air, obtain fresh water, air after the heat exchange reenters spray column, finish the closed cycle process of air, behind the seawater outflow heat exchanger, enter the spray column spray after being heated by heating unit again.
8. a kind of adverse current closed type multistage method for desalting seawater as claimed in claim 7 is characterized in that: the seawater part that flows out from described spray column is inflow heat exchanger again, the circulation desalination process of sustainable participation seawater.
9. a kind of adverse current closed type multistage method for desalting seawater as claimed in claim 7 is characterized in that: utilize sun power as the heating of seawater device.
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| CN108249497A (en) * | 2018-03-21 | 2018-07-06 | 张建东 | A kind of waste water airdistillation thickening-purification technology System and method for |
| CN108178218B (en) * | 2018-03-21 | 2023-06-30 | 张建东 | System and method for crystallizing and drying wastewater concentrate by directly discharging air |
| CN108751311A (en) * | 2018-07-18 | 2018-11-06 | 中国海洋大学 | A kind of evaporation-type seawater desalination system and method using engine of boat and ship waste heat |
| CN110451711A (en) * | 2019-08-13 | 2019-11-15 | 武汉宏澳绿色能源工程有限责任公司 | A kind of system and method for realizing high-salt wastewater condensing crystallizing using air air lift |
| CN110642444A (en) * | 2019-10-28 | 2020-01-03 | 中国华电科工集团有限公司 | Vacuum phase-change wastewater concentration and flue gas waste heat recovery system |
| CN212269517U (en) * | 2020-06-05 | 2021-01-01 | 北京清建能源技术有限公司 | Pure hot distilled water preparation facilities |
| CN113149112A (en) * | 2021-04-25 | 2021-07-23 | 清华大学 | Method for realizing hydrothermal coproduction by vertical multistage flash evaporation |
| CN113856219A (en) * | 2021-10-20 | 2021-12-31 | 江苏盛勤环境工程有限公司 | Low-temperature normal-pressure evaporation device and evaporation process thereof |
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