CN105439228A - Stepped low-temperature exhaust heat seawater desalination system - Google Patents
Stepped low-temperature exhaust heat seawater desalination system Download PDFInfo
- Publication number
- CN105439228A CN105439228A CN201510892338.7A CN201510892338A CN105439228A CN 105439228 A CN105439228 A CN 105439228A CN 201510892338 A CN201510892338 A CN 201510892338A CN 105439228 A CN105439228 A CN 105439228A
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- Prior art keywords
- seawater
- sea water
- desalinating plant
- water desalinating
- runner
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
- C02F1/043—Details
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/08—Seawater, e.g. for desalination
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2301/00—General aspects of water treatment
- C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
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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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- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Heat Treatment Of Water, Waste Water Or Sewage (AREA)
Abstract
The invention provides a stepped low-temperature exhaust heat seawater desalination system. Multiple seawater desalination devices are added in a reasonable water head height interval, the boiling point of each seawater desalination device is controlled by utilizing the natural water head height, the larger the water head height is, the lower the evaporating temperature is, secondary steam produced in the seawater desalination devices at the lower portion is used as a heat source for an evaporator at the upper portion through reasonable arrangement, and stepped repeated utilization of energy is achieved.
Description
Technical field
The present invention relates to a kind of step type low-temperature residual heat seawater desalinizing system.
Background technology
In common hot method desalination technology, low-temperature multi-effect method operating temperature is minimum, can realize minimum heat source temperature also more than 70 DEG C.And the steam of high temperature like this, for Modern Power Plant, still there is certain acting ability.Global energy inadequate resource, has been difficult to tackle the huge energy consumed in desalting process.
In order to reduce the hear rate of sea water desaltination ton water, whole sea water desaltination industry is all managing to make energy consumption close to minimum working.For hot method, be nearly all by multiple for evaporator room horizontal array " level ", utilize vacuum apparatus to be extracted into setting vacuum tightness to every one-level.Utilize the relation of vacuum tightness and boiling point, the vacuum of rear stage is lower than previous stage, and the secondary steam utilizing previous stage boiling to produce is as the thermal source of next stage.Multistage by setting up, as multistage flash evaporation, low-temperature multi-effect etc., realize energy and repeatedly utilize to reduce sea water desaltination unit consumption of energy.But there are two key issues in multilevel device: one is utilize large-scale vacuum device to vacuumize whole equipment; Two is need the vacustat controlling to take out every one-level in set(ting)value.The former significant challenge is the stability of vacuum unit, and latter significant challenge is the precision of Controlling System.These 2 is the bottleneck problem of desalination process steady running in hot method sea water desaltination.
Summary of the invention
The object of the invention is, in order to overcome above deficiency, to provide a kind of step type low-temperature residual heat seawater desalinizing system.Realize accurately controlling vacuum tightness by gravity head, and the influence on system operation of maximum limit reduction vacuum unit to system is this patent technical issues that need to address.
Object of the present invention realizes like this:
A kind of step type low-temperature residual heat seawater desalinizing system, wherein, comprise multiple sea water desalinating plant, described multiple sea water desalinating plant is from top to bottom in vertically distribution, described sea water desalinating plant comprises heat exchange runner, vapour passage, porous medium and seawater runner, described seawater runner is positioned at bottom described sea water desalinating plant, described seawater runner one end connects seawater inflow line, the other end connects seawater and flows out pipeline, described porous medium is positioned at described seawater runner top position, described heat exchange runner is positioned at described sea water desalinating plant tip position, described vapour passage is positioned at described heat exchange runner lower position, and be positioned at porous medium top position, seawater in described seawater runner is drawn into vapour passage by porous medium, multiple heat-conducting fins is provided with in described steam flow channel, the heat exchange runner two ends being positioned at the sea water desalinating plant of bottommost are provided with high temperature heat source pipeline, and its vapour passage connects the heat exchanger channels of sea water desalinating plant above bottom line water desalination apparatus by pipeline, top sea water desalinating plant vapour passage is connected with fresh water pipeline, and described vapour passage exit is provided with prolong, the heat exchanger channels exit end of described each sea water desalinating plant is all connected with fresh water pipeline.
Above-mentioned a kind of step type low-temperature residual heat seawater desalinizing system, wherein, described porous medium is capillary wick.
Compared with prior art, beneficial effect of the present invention is:
The boiling point of water is directly under pressure impact, and when hydraulic pressure is a standard atmospheric pressure, boiling point is 100 DEG C; And hydraulic pressure boiling point when 4.3KPa is 30 DEG C.The relation of integrated water grease head highness and pressure relation, pressure and boiling point, can show that boiling point with the relation between head height as shown in Figure 2.
By setting up multiple sea water desalinating plant in reasonable head height interval, Natural Water grease head highness is utilized to control each sea water desalinating plant mid-boiling point, and head height is larger, vaporization temperature is lower, the secondary steam realizing producing in sea water desalinating plant below by reasonable Arrangement is used as the thermal source of vaporizer above, and the step realizing the energy is recycled.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Fig. 2 is that boiling point of the present invention is with the graph of a relation between head height.
Embodiment
Below in conjunction with accompanying drawing, the invention will be further described.
As shown in the figure, a kind of step type low-temperature residual heat seawater desalinizing system, wherein, comprise 8 sea water desalinating plants 6, described 8 sea water desalinating plants 6 are from top to bottom in vertically distribution, described sea water desalinating plant 6 comprises heat exchange runner 7, vapour passage 9, porous medium 10 and seawater runner 11, described seawater runner 11 is positioned at bottom described sea water desalinating plant 6, described seawater runner 11 one end connects seawater inflow line 3, the other end connects seawater and flows out pipeline 5, described porous medium 10 is positioned at described seawater runner 11 top position, described heat exchange runner 7 is positioned at described sea water desalinating plant 6 tip position, described vapour passage 9 is positioned at described heat exchange runner 7 lower position, and be positioned at porous medium 10 top position, seawater in described seawater runner 11 is drawn into vapour passage 9 by porous medium 10, multiple heat-conducting fins 8 is provided with in described steam flow channel 9, heat exchange runner 7 two ends being positioned at the sea water desalinating plant 6 of bottommost are provided with high temperature heat source pipeline 1,2, and its vapour passage 9 connects the heat exchanger channels 7 of sea water desalinating plant 6 above bottom line water desalination apparatus by pipeline, top sea water desalinating plant 6 vapour passage is connected with fresh water pipeline 4, and described vapour passage 7 exit is provided with prolong 12, the heat exchanger channels exit end of described each sea water desalinating plant 6 is all connected with fresh water pipeline 4.Described porous medium 10 is capillary wick.
Head height on described eight sea water desalinating plants is respectively H1=8.59m, H2=8.91m, H3=9.11m, H4=9.31m, H5=9.48m, H6=9.64m, H7=9.74m, H8=9.82m.
Described eight sea water desalinating plant height, vacuum tightness and boiling temperatures are as shown in table 1.
| Head height H | 8.59m | 8.91m | 9.11m | 9.31m | 9.48m | 9.64m | 9.74m | 9.82m |
| For vacuum | 17KPa | 13.9KPa | 12.0KPa | 10.0KPa | 8.3KPa | 6.8KPa | 5.8KPa | 5.1KPa |
| Boiling temperature | 56.6℃ | 52.4℃ | 49.5℃ | 45.9℃ | 42.2℃ | 38.5℃ | 35.4℃ | 33.1℃ |
Compared with prior art, beneficial effect of the present invention is:
The boiling point of water is directly under pressure impact, and when hydraulic pressure is a standard atmospheric pressure, boiling point is 100 DEG C; And hydraulic pressure boiling point when 4.3KPa is 30 DEG C.The relation of integrated water grease head highness and pressure relation, pressure and boiling point, can show that boiling point with the relation between head height as shown in Figure 2.
By setting up multiple sea water desalinating plant in reasonable head height interval, Natural Water grease head highness is utilized to control each sea water desalinating plant mid-boiling point, and head height is larger, vaporization temperature is lower, the secondary steam realizing producing in sea water desalinating plant below by reasonable Arrangement is used as the thermal source of vaporizer above, and the step realizing the energy is recycled.
Gravity head is utilized to realize step type low-temperature multiple-effect seawater desalination.In pipe, water colunm height stability is high, by setting up sea water desalinating plant to realize specific vacuum tightness in specific head height.By arranging sea water desaltination dress at the different head places of water colunm height, the secondary steam realizing a upper effect generation is used as the thermal source of next effect.Utilize nature water colunm height to form vacuum, without the need to vacuum pump, improve stability vertical direction arranged stacked, arrange unlike conventional desalination state of the art, can floor space be greatly reduced.
Above embodiment is only used to further illustrate the present invention; can not be interpreted as limiting the scope of the invention, some nonessential improvement that those skilled in the art's foregoing according to the present invention is made and adjustment all belong to protection scope of the present invention.
Claims (2)
1. a step type low-temperature residual heat seawater desalinizing system, it is characterized in that, comprise multiple sea water desalinating plant, described multiple sea water desalinating plant is from top to bottom in vertically distribution, described sea water desalinating plant comprises heat exchange runner, vapour passage, porous medium and seawater runner, described seawater runner is positioned at bottom described sea water desalinating plant, described seawater runner one end connects seawater inflow line, the other end connects seawater and flows out pipeline, described porous medium is positioned at described seawater runner top position, described heat exchange runner is positioned at described sea water desalinating plant tip position, described vapour passage is positioned at described heat exchange runner lower position, and be positioned at porous medium top position, seawater in described seawater runner is drawn into vapour passage by porous medium, multiple heat-conducting fins is provided with in described steam flow channel, the heat exchange runner two ends being positioned at the sea water desalinating plant of bottommost are provided with high temperature heat source pipeline, and its vapour passage connects the heat exchanger channels of sea water desalinating plant above bottom line water desalination apparatus by pipeline, top sea water desalinating plant vapour passage is connected with fresh water pipeline, and described vapour passage exit is provided with prolong, the heat exchanger channels exit end of described each sea water desalinating plant is all connected with fresh water pipeline.
2. a kind of step type low-temperature residual heat seawater desalinizing system as claimed in claim 1, is characterized in that, described porous medium is capillary wick.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510892338.7A CN105439228A (en) | 2015-12-08 | 2015-12-08 | Stepped low-temperature exhaust heat seawater desalination system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510892338.7A CN105439228A (en) | 2015-12-08 | 2015-12-08 | Stepped low-temperature exhaust heat seawater desalination system |
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| CN105439228A true CN105439228A (en) | 2016-03-30 |
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| CN201510892338.7A Pending CN105439228A (en) | 2015-12-08 | 2015-12-08 | Stepped low-temperature exhaust heat seawater desalination system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111003742A (en) * | 2019-12-06 | 2020-04-14 | 华北电力大学 | Seawater desalination system for solar photovoltaic waste heat-joule heat gradient utilization |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004283798A (en) * | 2003-03-25 | 2004-10-14 | Masato Kino | Liquid separation apparatus using membrane |
| CN103496751A (en) * | 2013-10-23 | 2014-01-08 | 武汉大学 | Low-temperature energy-saving marine seawater desalination system |
| CN104445481A (en) * | 2014-12-19 | 2015-03-25 | 武汉大学 | Waste heat electricity-water coproduction system |
-
2015
- 2015-12-08 CN CN201510892338.7A patent/CN105439228A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004283798A (en) * | 2003-03-25 | 2004-10-14 | Masato Kino | Liquid separation apparatus using membrane |
| CN103496751A (en) * | 2013-10-23 | 2014-01-08 | 武汉大学 | Low-temperature energy-saving marine seawater desalination system |
| CN104445481A (en) * | 2014-12-19 | 2015-03-25 | 武汉大学 | Waste heat electricity-water coproduction system |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111003742A (en) * | 2019-12-06 | 2020-04-14 | 华北电力大学 | Seawater desalination system for solar photovoltaic waste heat-joule heat gradient utilization |
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Application publication date: 20160330 |
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