CN106145227A - A kind of low temperature multi-effect seawater desalting system and desalination method - Google Patents
A kind of low temperature multi-effect seawater desalting system and desalination method Download PDFInfo
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- CN106145227A CN106145227A CN201610828733.3A CN201610828733A CN106145227A CN 106145227 A CN106145227 A CN 106145227A CN 201610828733 A CN201610828733 A CN 201610828733A CN 106145227 A CN106145227 A CN 106145227A
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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
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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
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/08—Seawater, e.g. for 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
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- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
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- Organic Chemistry (AREA)
- Heat Treatment Of Water, Waste Water Or Sewage (AREA)
- Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
Abstract
The invention provides a kind of low temperature multi-effect seawater desalting system and desalination method, raw material is before entering low temperature multiple-effect distillation system, when raw material temperature is less than the material design temperature of entrance end effect group evaporimeter, by concentrated seawater heat exchanger, raw material is preheated, so that reaching preset value when raw material enters evaporimeter；Using a point effect set of segmentation charging, the dense water at a rear effect group evaporimeter enters at previous effect group evaporimeter after the dense water heat exchange that overrich water-to-water heat exchanger and the first effect group evaporimeter reclaim.Can solve the problem that the problem that Conventional parallel charging flow process material seawater recoveries is low, reduce operation dosing and power consumption cost；Not only solve the deficiency of traditional handicraft mode, and improve the thermal efficiency of low-temperature multi-effect desalination system, reduce equipment investment and operating cost；This technological process has that water generation ratio is high, the material water rate of recovery high, and power consumption is low, and the thermal efficiency is high, equipment investment and the advantage such as operating cost is low.
Description
Technical field
The invention belongs to field of sea water desalting technology, especially relate to a kind of low temperature multi-effect seawater desalting system and desalination side
Method.
Background technology
Low temperature multiple-effect distillation sea water desalting technology refers to the distillation desalination technology less than 70 DEG C for the highest evaporating temperature of seawater,
It is characterized in that being together in series a series of horizontal tube sprinkling falling-film evaporator, enter through steaming repeatedly with a certain amount of steam
Send out and condensation, thus obtain being multiple times than the desalination process of the distilled water of quantity of steam.
Low-temperature multiple-effect seawater desalination technological process is mainly imitated group selection, heat exchanger form by material water intake mode, evaporimeter
And the composition such as the setting of position.
Selecting different technological processes, the performance indications of low temperature multiple-effect distillation sea water desalting device are all different, bring
Equipment investment and operating cost difference very big.So the selection of technological process is particularly heavy to low temperature multi-effect seawater desalting system
Want.
Traditional low-temperature multiple-effect seawater desalination technological process by the difference of material water intake mode be broadly divided into parallel feed and
Sectional feeding two kinds.Both technology modes have respective advantage, but there is also certain deficiency simultaneously.Parallel feed technique
It is generally required to substantial amounts of material seawater, the rate of recovery of seawater is relatively low.High temperature effect material water degree of supercooling is relatively big, and system needs setting many
Individual bleeder heater, equipment cost is higher.Sectional feeding technique, although seawater recoveries is higher, but equipment needs to arrange multiple
Flash tank reclaims dense hydro-thermal amount, and system is complex.
Content of the invention
In view of this, it is contemplated that propose a kind of low temperature multi-effect seawater desalting system and desalination method, parallel to solve
The feeding process rate of recovery is low, and sectional feeding to need to arrange multiple flash tank high to reclaim dense hydro-thermal amount, system complex, energy consumption
Problem.
For reaching above-mentioned purpose, the technical scheme is that and be achieved in that:
A kind of low temperature multi-effect seawater desalting system, including intake system, feed system and low temperature multiple-effect distillation system；
Described low temperature multiple-effect distillation system includes multiple-effect group evaporimeter and condenser 6；Each described effect group evaporimeter is at least
Including 1st effective evaporator；The dense water out of the first effect group evaporimeter connects dense Water Sproading pipe；Along steam flow direction, previous effect group
The steam (vapor) outlet of evaporimeter is connected with the steam inlet of a rear effect group evaporimeter, and the steam (vapor) outlet of end effect group evaporimeter is solidifying with described
The steam inlet of vapour device 6 is connected；The condensation-water drain of the condensation-water drain of described condenser 6 and each effect group evaporimeter is respectively connected with
Product water recovery tube, the fresh water pipe between the second single-effect evaporator 52 product water is by effect is from flowing to next effect dilute side, until converging
Collection arrives last evaporator 510, cools down water with described condenser 6 and together passes through product water pipe device for transferring；
The air inlet pipe outlet of described gas handling system and the steam of the first effect group evaporimeter of described low temperature multiple-effect distillation system
Entrance is connected；
Described feed system includes the material water import of feeding pipe, described feeding pipe liquid outlet and end effect group evaporimeter
It is connected；The dense water out of a rear effect group evaporimeter connects the material water import of previous effect group evaporimeter；A rear effect group evaporimeter
Between the material water import of dense water out and previous effect group evaporimeter, being provided with the dense water being reclaimed by the first effect group evaporimeter provides heat
The dense water-to-water heat exchanger 13 in source；The described fixed gas coming together in condenser 6 extracts device 2 by pipeline and fixed gas and is connected, the second effect
Dense water in group evaporimeter extracts through fixed gas and enters after device 2 in first effect group evaporimeter.
Further, described feeding pipe being in series with at least one dense water being reclaimed by the first effect group evaporimeter provides heat
The dense water-to-water heat exchanger 14 in source.
Further, described feed system also includes former seawaterline, and described former seawaterline is in series with at least one
The dense water being reclaimed by the first effect group evaporimeter provides the seawater preheating device 17 of thermal source, described former seawaterline and described condenser 6
Being connected, described condenser 6 coolant outlet is connected with described feeding pipe entrance, it is preferred that described seawater preheating device 17 and dense
The 13rd, water-to-water heat exchanger 14 is plate type heat exchanger.
Further, the condensation-water drain of the first single-effect evaporator 51 in described first effect group evaporimeter and condensation water cooling
Device 18 is connected；Described condensate cooler 18 is carried Cooling Water by raw material；The first effect in described first effect group evaporimeter is steamed
The condensation-water drain sending out device 51 is also connected with described former seawaterline.
Further, described product water recovery tube is provided with product water cooler 16.
Further, described fixed gas extracts device 2 is vavuum pump.
Further, what the entrance of the air inlet pipeline in described gas handling system connected between power steam and evaporimeter is arbitrary
Steam pipe.
Further, the air inlet pipeline in described gas handling system is provided with TVC1.First single-effect evaporator 51 thermal source is from TVC
Rear desuperheat 4 exports mixed vapour, the indirect steam of the evaporation of seawater from a upper effect for the thermal source of remaining evaporimeter.
Further, before the air inlet pipeline in described gas handling system being additionally provided with TVC, after Desuperheating device 3 and TVC, desuperheat fills
Putting 4, described TVC1 is arranged on before described TVC after Desuperheating device 3 and TVC between Desuperheating device 4.
Further, along steam flow direction, described low-temperature multi-effect group evaporimeter includes that the first effect group being sequentially connected with is steamed
Send out device, the second effect group evaporimeter and triple effect group evaporimeter；
Described first effect group evaporimeter includes the first single-effect evaporator 51 and the second single-effect evaporator 52 being sequentially connected with；
Described second effect group evaporimeter includes third effect evaporator the 53rd, fourth evaporator 54 and the 5th effect being sequentially connected with
Evaporimeter 55；
Described second effect group evaporimeter includes sextuple effect the 56th, the 7th single-effect evaporator the 57th, the 8th effect being sequentially connected with
Evaporimeter the 58th, the 9th single-effect evaporator 59 and last evaporator 510.
Another object of the present invention is to propose a kind of method utilizing low temperature multi-effect seawater desalting system to desalinize seawater,
Using a point effect set of segmentation charging, material enters in end effect group evaporimeter, and the dense water of a rear effect group evaporimeter is through overrich
Previous effect group evaporimeter is entered after the dense water heat exchange that water-to-water heat exchanger 13 and the first effect group evaporimeter reclaim；In second effect group evaporimeter
Dense water extract through fixed gas and enter in the first effect group evaporimeter after device 2 preheats further；
After the steam of gas handling system entrance the first single-effect evaporator 51 is carried out heat exchange with raw material water, condense water by condensing
Condensate cooler 18 delivered to by water pump 10, and the indirect steam of evaporation of seawater enters the second single-effect evaporator 52, and the steam of the second effect is cold
The product water pipe gravity flow that solidifying water passes through between effect is imitated to next, and the indirect steam of the second effect evaporation of seawater is as third effect evaporator 53
Thermal source, by that analogy, until last evaporator 510；The thermal source of each evaporimeter after the i.e. first single-effect evaporator 51 is from upper one
The indirect steam of the evaporation of seawater of effect；
By seawater preheating device 17, raw material is preheated, so that reaching preset value when raw material enters condenser 6；Former
Material water enters condenser 6 and cools down end effect steam, is also preheated simultaneously, initially enters end effect group evaporimeter, and dense water is through overrich water
Enter at previous effect group evaporimeter after heat exchanger 13 heat exchange, finally discharged by the first effect group evaporimeter and returned by dense Water Sproading pipe
Receive.
Relative to prior art, low temperature multi-effect seawater desalting system of the present invention has the advantage that
(1) low temperature multi-effect seawater desalting system of the present invention is by arranging seawater preheating device and dense water-to-water heat exchanger, replaces
Setting for conventional segmented flow process dense water flash tank, it is possible to increase the heat utilization efficiency of system；On the one hand it is effectively utilized high temperature effect
The heat of group concentrated seawater, on the other hand reduces the degree of supercooling of low temperature effect group material seawater.
(2) in low temperature multi-effect seawater desalting system of the present invention, seawater preheating device and dense water-to-water heat exchanger are board-like changing
Hot device, substitutes the setting of Conventional parallel charging flow process bleeder heater, lowers equipment investment, improve system water generation ratio.
(3) low-temperature multi-effect seawater desalination process of the present invention uses a point effect set of segmentation charging, solves Conventional parallel and enters
The low problem of stream journey material seawater recoveries, reduces operation dosing and power consumption cost；Not only solve traditional handicraft mode
Deficiency, and improve the thermal efficiency of low-temperature multi-effect desalination system, reduce equipment investment and operating cost；This technological process
Having that water generation ratio is high, the material water rate of recovery high, power consumption is low, and the thermal efficiency is high, equipment investment and the advantage such as operating cost is low.
Brief description
A part of accompanying drawing constituting the present invention is used for providing a further understanding of the present invention, and the present invention's is schematic real
Execute example and illustrate for explaining the present invention, being not intended that inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 is the low temperature multi-effect seawater desalting system schematic diagram described in the embodiment of the present invention.
Description of reference numerals:
1-TVC；2-fixed gas extracts device；Desuperheating device before 3-TVC；Desuperheating device after 4-TVC；51-the first single-effect evaporator；
52-the second single-effect evaporator；53-third effect evaporator；54-fourth evaporator；55-quintuple effect evaporator；56-sextuple-effect evaporation
Device；57-the 7th single-effect evaporator；58-the 8th single-effect evaporator；59-the 9th single-effect evaporator；510-last evaporator；6-condenser；7-
Material water booster；The middle water pump of 8-first；The middle water pump of 9-second；10-condensate pump；11-desuperheat water pump；12-concentrated seawater
Pump；13rd, the dense water-to-water heat exchanger of 14-；15-product water pump；16-product water cooler；17-seawater preheating device；18-condenses water cooling
Device；The former sea water pump of 19-
Detailed description of the invention
Unless otherwise indicated, term used herein is respectively provided with the conventional implication understanding of those skilled in the art, in order to
Readily appreciate the present invention, some terms used herein have been carried out following definitions.
Using in the specification and in the claims, TVC is both vapor compression injector；Before TVC after Desuperheating device and TVC
Desuperheating device is existing Desuperheating device.
In describing the invention, it should be noted that unless otherwise clearly defined and limited, term " install ", " phase
Company ", " connection " should be interpreted broadly, for example, it may be fixing connect, it is also possible to be to removably connect, or be integrally connected；Can
To be to be mechanically connected, it is also possible to be electrical connection；Can be to be joined directly together, it is also possible to be indirectly connected to by intermediary, Ke Yishi
The connection of two element internals.For the ordinary skill in the art, above-mentioned term can be understood by concrete condition
Concrete meaning in the present invention.
Describe the bright present invention below in conjunction with embodiment and accompanying drawing in detail.
As it is shown in figure 1, a kind of low temperature multi-effect seawater desalting system, including intake system, feed system and low-temperature multi-effect steam
Evaporate system；
Low temperature multiple-effect distillation system includes multiple-effect group evaporimeter and condenser 6；Each effect group evaporimeter at least includes an effect
Evaporimeter；The dense water out of the first effect group evaporimeter connects dense Water Sproading pipe；Along steam flow direction, previous effect group evaporimeter
Steam (vapor) outlet is connected with the steam inlet of a rear effect group evaporimeter, the steam (vapor) outlet of end effect group evaporimeter and the steam of condenser 6
Entrance is connected；The condensation-water drain of the condensation-water drain of condenser 6 and each effect group evaporimeter is respectively connected with product water recovery tube, from
Second single-effect evaporator 52 product water by effect between fresh water pipe from flow to next effect dilute side, until being pooled to last evaporator
510, cool down water with condenser 6 and together pass through product water pipe device for transferring；
The air inlet pipe outlet of gas handling system is connected with the steam inlet of the first effect group evaporimeter of low temperature multiple-effect distillation system；
Feed system includes feeding pipe, feeding pipe is in series with at least one by the first effect group evaporimeter reclaim dense
Water provides the dense water-to-water heat exchanger 14 of thermal source；Feeding pipe liquid outlet is connected with the material water import of end effect group evaporimeter；A rear effect
The dense water out of group evaporimeter connects the material water import of previous effect group evaporimeter；The dense water out of a rear effect group evaporimeter with front
Between the material water import of one effect group evaporimeter, being provided with the dense water being reclaimed by the first effect group evaporimeter provides the dense water heat exchange of thermal source
Device 13；Come together in the fixed gas of condenser 6 to extract device 2 by pipeline and fixed gas and be connected.In this example, fixed gas extracts device 2 and is
Vavuum pump, the dense water in the second effect group evaporimeter extracts through fixed gas and enters after device 2 in first effect group evaporimeter.
In this example, in each single-effect evaporator, material water import is equipped with spray thrower, and the material water of spray ensures enough uniform
Degree, in this example, material water is seawater.
In this example, condenser 6 is cooling agent by former seawater, and feed system also includes former seawaterline, on former seawaterline
Being in series with at least one dense water being reclaimed by the first effect group evaporimeter provides the seawater preheating device 17 of thermal source, former seawaterline with solidifying
Vapour device 6 is connected, and condenser 6 coolant outlet is connected with feeding pipe entrance, and seawater preheating device 17 and dense water-to-water heat exchanger are the 13rd, 14 equal
For plate type heat exchanger.
In this example, the condensation-water drain of the first single-effect evaporator 51 in the first effect group evaporimeter and condensate cooler 18
It is connected；Condensate cooler 18 is carried Cooling Water by raw material；The condensation of the first single-effect evaporator 51 in the first effect group evaporimeter
Water out is also connected with former seawaterline.
Product water recovery tube is provided with product water cooler 16.In this example, the cooling agent of product water cooler 16 is former sea
Water.
Air inlet pipeline in gas handling system is provided with TVC1.It is additionally provided with desuperheat before TVC on air inlet pipeline in gas handling system
Desuperheating device 4 after device 3 and TVC, TVC1 is arranged on before TVC after Desuperheating device 3 and TVC between Desuperheating device 4.First effect evaporation
Device 51 thermal source desuperheat 4 after TVC exports mixed vapour, the secondary of the evaporation of seawater from a upper effect for the thermal source of remaining evaporimeter
Steam.
Along steam flow direction in this example, the first effect group evaporimeter that low-temperature multi-effect group evaporimeter includes being sequentially connected with,
Second effect group evaporimeter and triple effect group evaporimeter；
First effect group evaporimeter includes the first single-effect evaporator 51 and the second single-effect evaporator 52 being sequentially connected with；
Second effect group evaporimeter includes third effect evaporator the 53rd, fourth evaporator 54 and the 5th effect evaporation being sequentially connected with
Device 55；
Second effect group evaporimeter includes sextuple effect the 56th, the 7th single-effect evaporator the 57th, the 8th effect evaporation being sequentially connected with
Device the 58th, the 9th single-effect evaporator 59 and last evaporator 510.In this example, each single-effect evaporator is Falling Film Evaporator of Horizontal Tube.
In this example, TVC1 on air inlet pipeline and power steam and the 8th single-effect evaporator the 58th, the 9th single-effect evaporator 59 it
Between steam pipe be connected.The utilization rate of power steam can be improved.
The work process of this example: raw material seawater is introduced in condenser 6 through former sea water pump 19.After flowing out condenser 6, one
Part seawater is discharged, and residue is referred to as " seawater make-up water ".Seawater make-up water part part is directly over material water liter
Press pump 7 directly sprays on the heat-exchanging tube bundle of the 9th single-effect evaporator 59 and last evaporator 510 in the way of parallel feed；Seawater
Make-up water remainder sprays sextuple effect after carrying out heat exchange with seawater preheating device 14 in the way of parallel feed
56th, on the heat-exchanging tube bundle of the 7th single-effect evaporator 57 and the 8th single-effect evaporator 58, to reduce material water supercooling in end effect group evaporimeter
Degree, improves heat exchange efficiency；Sextuple effect the 56th, the 7th single-effect evaporator the 57th, the 8th single-effect evaporator the 58th, the 9th single-effect evaporator 59 and
Dense water in last evaporator 510, after the first middle water pump 8 with the heat exchange of dense water-to-water heat exchanger 13, sprays in the way of parallel feed
Pour on the heat-exchanging tube bundle of third effect evaporator the 53rd, fourth evaporator 54 and quintuple effect evaporator 55；Third effect evaporator is the 53rd,
Dense water in fourth evaporator 54 and quintuple effect evaporator 55 sprays after the second middle water pump 9 and fixed gas extract device 2
On the heat-exchanging tube bundle of the first single-effect evaporator 51 and the second single-effect evaporator 52；The dense water of the first effect group evaporimeter is by dense Water Sproading pipe
Reclaim and discharged by the concentrated seawater pump 12 on dense Water Sproading pipe and i.e. obtain concentrated seawater.
Power steam is entered the first single-effect evaporator 51 in the first effect group evaporimeter by gas handling system, and steam enters with raw material
After row heat exchange, and condensation in tube bank, a part is sprayed the evaporation of seawater in tube bank by the heat energy being discharged.Produced
Steam is by the tube bank condensation at rear 1st effective evaporator, and rear 1st effective evaporator is lower than the temperature of front 1st effective evaporator.In each effect
Evaporimeter all can some seawater be evaporated.Second single-effect evaporator the 52nd, third effect evaporator the 53rd, fourth evaporator is the 54th,
Quintuple effect evaporator the 55th, sextuple effect the 56th, the 7th single-effect evaporator the 57th, the 8th single-effect evaporator 58 and the 9th single-effect evaporator 59
Condensed water enters into product water recovery tube and reclaims, the steam of last evaporator 510 enter after condenser 6 condensed water also into
Carry out reclaiming to product water recovery tube and extracted out by product water pump 15, obtaining product water.Product water can be according in advance when being recovered
If temperature chooses whether to cool down through product water cooler 16.A condensed water part in first single-effect evaporator 51 is through condensing water
Discharge after pump 10 and condensate cooler 18；Another part Desuperheating device before condensate pump 10 and desuperheat water pump 11 are through TVC
After 3, TVC, Desuperheating device 4 enters in air inlet pipeline.
A kind of method utilizing low temperature multi-effect seawater desalting system to desalinize seawater, uses a point effect set of segmentation charging, a rear effect
The dense water of group evaporimeter enters previous effect group after the dense water heat exchange that overrich water-to-water heat exchanger 13 and the first effect group evaporimeter reclaim and steams
Send out device；The second dense water of effect group extracts after device 2 preheats further through fixed gas and enters the first effect group；
After the steam of gas handling system entrance the first single-effect evaporator 51 is carried out heat exchange with raw material water, condense water by condensing
Condensate cooler 18 delivered to by water pump 10, and the indirect steam of evaporation of seawater enters the second single-effect evaporator 52, and the steam of the second effect is cold
The product water pipe gravity flow that solidifying water passes through between effect is imitated to next, and the indirect steam of the second effect evaporation of seawater is as third effect evaporator 53
Thermal source, by that analogy, until last evaporator 510；The thermal source of each evaporimeter after the i.e. first single-effect evaporator 51 is from upper one
The indirect steam of the evaporation of seawater of effect；
By seawater preheating device 17, raw material is preheated, so that reaching preset value when raw material enters condenser 6；Former
Material water enters condenser 6 and cools down end effect steam, is also preheated simultaneously, initially enters end effect group evaporimeter, and dense water is through overrich water
Enter at previous effect group evaporimeter after heat exchanger 13 heat exchange, finally discharged by the first effect group evaporimeter and returned by dense Water Sproading pipe
Receive.
The foregoing is only presently preferred embodiments of the present invention, not in order to limit the present invention, all essences in the present invention
Within god and principle, any modification, equivalent substitution and improvement etc. made, should be included within the scope of the present invention.
Claims (10)
1. a low temperature multi-effect seawater desalting system, it is characterised in that: include intake system, feed system and low temperature multiple-effect distillation
System；
Described low temperature multiple-effect distillation system includes multiple-effect group evaporimeter and condenser (6)；Each described effect group evaporimeter at least wraps
Include 1st effective evaporator；The dense water out of the first effect group evaporimeter connects dense Water Sproading pipe；Along steam flow direction, previous effect group is steamed
The steam (vapor) outlet sending out device is connected with the steam inlet of a rear effect group evaporimeter, the steam (vapor) outlet of end effect group evaporimeter and described condensing
The steam inlet of device (6) is connected；The condensation-water drain of the condensation-water drain of described condenser (6) and each effect group evaporimeter is all connected with
There is product water recovery tube；
The air inlet pipe outlet of described gas handling system and the steam inlet of the first effect group evaporimeter of described low temperature multiple-effect distillation system
It is connected；
Described feed system includes feeding pipe, the material water import phase of described feeding pipe liquid outlet and end effect group evaporimeter
Even；The dense water out of a rear effect group evaporimeter connects the material water import of previous effect group evaporimeter；A rear effect group evaporimeter dense
Between the material water import of water out and previous effect group evaporimeter, being provided with the dense water being reclaimed by the first effect group evaporimeter provides thermal source
Dense water-to-water heat exchanger (13)；The described fixed gas coming together in condenser (6) extracts device (2) with fixed gas and is connected, and the second effect group is steamed
Send out the dense water in device to extract through fixed gas and enter after device (2) in the first effect group evaporimeter.
2. low temperature multi-effect seawater desalting system according to claim 1, it is characterised in that: it is in series with on described feeding pipe
The dense water that at least one is reclaimed by the first effect group evaporimeter provides the dense water-to-water heat exchanger (14) of thermal source.
3. low temperature multi-effect seawater desalting system according to claim 2, it is characterised in that: described feed system also includes former
Seawaterline, described former seawaterline is in series with at least one dense water being reclaimed by the first effect group evaporimeter provides the sea of thermal source
Water preheater (17), described former seawaterline is connected with described condenser (6), described condenser (6) coolant outlet with described
Feeding pipe entrance is connected；Preferably, described seawater preheating device (17) and dense water-to-water heat exchanger (the 13rd, 14) are plate type heat exchanger.
4. low temperature multi-effect seawater desalting system according to claim 1, it is characterised in that: in described first effect group evaporimeter
The condensation-water drain of the first single-effect evaporator (51) be connected with condensate cooler (18)；Described condensate cooler (18) is by former
Material carries Cooling Water；The condensation-water drain of the first single-effect evaporator (51) in described first effect group evaporimeter also with described former sea
Water lines is connected.
5. low temperature multi-effect seawater desalting system according to claim 1, it is characterised in that: set on described product water recovery tube
There is product water cooler (16).
6. low temperature multi-effect seawater desalting system according to claim 1, it is characterised in that: the air inlet in described gas handling system
The entrance of pipeline connects the arbitrary steam pipe between power steam and evaporimeter.
7. low temperature multi-effect seawater desalting system according to claim 6, it is characterised in that: the air inlet in described gas handling system
Pipeline is provided with TVC (1).
8. low temperature multi-effect seawater desalting system according to claim 7, it is characterised in that: the air inlet in described gas handling system
Being additionally provided with before TVC Desuperheating device (4) after Desuperheating device (3) and TVC on pipeline, described TVC (1) is arranged on desuperheat before described TVC
After device (3) and TVC between Desuperheating device (4).
9. low temperature multi-effect seawater desalting system according to claim 1, it is characterised in that: along steam flow direction, described
Low-temperature multi-effect group evaporimeter includes the first effect group evaporimeter, the second effect group evaporimeter and the triple effect group evaporimeter being sequentially connected with；
Described first effect group evaporimeter includes the first single-effect evaporator (51) and the second single-effect evaporator (52) being sequentially connected with；
Described second effect group evaporimeter includes third effect evaporator (53), fourth evaporator (54) and the 5th effect being sequentially connected with
Evaporimeter (55)；
Sextuple effect (56) that described second effect group evaporimeter includes being sequentially connected with, the 7th single-effect evaporator (57), the 8th effect
Evaporimeter (58), the 9th single-effect evaporator (59) and last evaporator (510).
10. utilizing the method that the low temperature multi-effect seawater desalting system described in any one of claim 1-9 desalinizes seawater, it is special
Levy and be: using a point effect set of segmentation charging, material enters in end effect group evaporimeter, and the dense water of a rear effect group evaporimeter is through overrich water
Previous effect group evaporimeter is entered after the dense water heat exchange that heat exchanger (13) and the first effect group evaporimeter reclaim；In second effect group evaporimeter
Dense water extract through fixed gas and enter in the first effect group evaporimeter after device (2) preheats further；
After the steam of gas handling system entrance the first single-effect evaporator (51) is carried out heat exchange with raw material water, condense water by condensing water
Condensate cooler (18) delivered to by pump (10), and the indirect steam of evaporation of seawater enters the second single-effect evaporator (52), the steaming of the second effect
The product water pipe gravity flow that vapour condensed water passes through between effect is imitated to next, and the indirect steam of the second effect evaporation of seawater is as triple effect evaporation
The thermal source of device (53), by that analogy, until last evaporator (510)；
By seawater preheating device (17), raw material is preheated, so that reaching preset value when raw material enters condenser (6)；Former
Material water enters condenser (6) cooling end effect steam, is also preheated simultaneously, initially enters end effect group evaporimeter, and dense water is through overrich
Enter at previous effect group evaporimeter after water-to-water heat exchanger (13) heat exchange, finally discharged and by dense Water Sproading pipe by the first effect group evaporimeter
Reclaim.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610828733.3A CN106145227A (en) | 2016-09-18 | 2016-09-18 | A kind of low temperature multi-effect seawater desalting system and desalination method |
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| CN101264947A (en) * | 2008-04-30 | 2008-09-17 | 华北电力大学 | Segment water-water preheating multiple-effect distillation sea water desalination technical process |
| WO2008139647A1 (en) * | 2007-04-27 | 2008-11-20 | Saline Water Conversion Corporation | Desalination apparatus and method of desalination |
| CN101885548A (en) * | 2010-05-26 | 2010-11-17 | 中国电力工程顾问集团华北电力设计院工程有限公司 | Low-temperature multi-effect seawater desalting inter-regenerative multi-stage spraying raw water supply system |
| CN103043735A (en) * | 2012-12-26 | 2013-04-17 | 东方电气集团东汽投资发展有限公司 | Heat pump type small seawater desalting device |
| CN103086451A (en) * | 2013-01-30 | 2013-05-08 | 大连理工大学 | Multi-effect evaporative sea water desalinating device with hybrid process |
| CN206308053U (en) * | 2016-09-18 | 2017-07-07 | 众和海水淡化工程有限公司 | A kind of low temperature multi-effect seawater desalting system |
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| WO2008139647A1 (en) * | 2007-04-27 | 2008-11-20 | Saline Water Conversion Corporation | Desalination apparatus and method of desalination |
| CN101264947A (en) * | 2008-04-30 | 2008-09-17 | 华北电力大学 | Segment water-water preheating multiple-effect distillation sea water desalination technical process |
| CN101885548A (en) * | 2010-05-26 | 2010-11-17 | 中国电力工程顾问集团华北电力设计院工程有限公司 | Low-temperature multi-effect seawater desalting inter-regenerative multi-stage spraying raw water supply system |
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