CN202542898U - Heat pipe type low-temperature multi-effect seawater dilution system - Google Patents

Heat pipe type low-temperature multi-effect seawater dilution system Download PDF

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Publication number
CN202542898U
CN202542898U CN2011204995773U CN201120499577U CN202542898U CN 202542898 U CN202542898 U CN 202542898U CN 2011204995773 U CN2011204995773 U CN 2011204995773U CN 201120499577 U CN201120499577 U CN 201120499577U CN 202542898 U CN202542898 U CN 202542898U
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China
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heat pipe
water
type
steam
effect evaporator
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CN2011204995773U
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Inventor
陈�峰
曲艳春
张博
张世乾
李京红
贠在斌
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Guodian New Energy Technology Institute
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Beijing Lucency Enviro Tech Co Ltd
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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02ATECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A20/00Water conservation; Efficient water supply; Efficient water use
    • Y02A20/124Water desalination

Abstract

The utility model discloses a heat pipe type low-temperature multi-effect seawater dilution system which comprises a plurality of groups of heat pipe type multi-effect evaporators, a steam ejector, a cooler, a steam-water releasing device, a steam-water separator, a water ring vacuum pump, a seawater booster pump, a permeate pump, a turbine middle-pressure cylinder, a turbine low-pressure cylinder and distribution of steam, dilute water and concentrated water among the heat pipe type multi-effect evaporators, wherein the first, second and third groups of heat pipe type multi-effect evaporators (1, 2 and 3) are connected in parallels; the water ring vacuum pump (8) is connected with the first, second and third groups of heat pipe type multi-effect evaporators (1, 2 and 3); a concentrated water pipe (17) is connected with the first, second and third second groups of heat pipe type multi-effect evaporator (1, 2 and 3); and fresh water joints of the second and third groups of heat pipe type multi-effect evaporator (2 and 3) and the cooler (5) are connected with the permeate pump (10).

Description

Heat pipe-type low-temperature multiple-effect seawater desalination system
Technical field
The present invention relates to hot method sea water desaltination, particularly relate to a kind ofly when utilizing the heat pipe-type multiple-effect evaporator to improve evaporation of seawater efficient, utilize inferior turbine low pressure cylinder steam discharge again,, improve power plant efficiency simultaneously to improve rate of energy.Add the steam that hot sea water produces through heat pipe, as the thermal source of later several groups of vaporizers, to improve the utilization ratio of steam.
Background technology
Low temperature multiple-effect distillation is meant that thermal source is the steam below 70 ℃; Before and after 1981, begin to be applied to payable seawater desalination system; It is characterized in that a series of level pipe spray falling liquid film steamers are together in series; Pass through repeatedly evaporation and condensation with a certain amount of steam input, the vaporization temperature that imitate back one is lower than front one effect, thereby obtains being multiple times than the zero(ppm) water of quantity of steam.The main method of using is following:
(1) MSF (MSF) distillation method
MSF is the most frequently used a kind of method of distillation sea water desalting, before the eighties in 20th century, and the most MSF technology that adopt of more large-scale sea water distiling plant.The Dagang Power Plant the second stage of the project has been introduced MSF (MSF) sea water distiling plant of the U.S., is the large-scale sea water distiling plant of China's first cover.The advantage of MSF device is that the equipment single-machine capacity is big, long service life, water outlet quality better, thermo-efficiency are high.But, must adopt expensive cupronickel, special stainless steel and titanium material, so equipment manufacturing cost is high because the maximum operating temperature of device concentrated seawater is bigger to the corrodibility of heat-transfer pipe and apparatus body about 110 ℃.In addition, in order to alleviate fouling and corrosion, the seawater of access to plant is added acid (remove CO with outgasing 2And O 2), thereby also increased and make the water cost.
(2) low-temperature multi-effect (MED) distillation method
The low-temperature multiple-effect seawater desalination technology is meant that the salt solution top temperature is lower than 70 ℃, adopts the desalination techniques of low temperature transverse tube spraying technique.The low-temperature multi-effect vaporizer is with a series of level pipe sprinkling falling-film evaporator arranged in series; In the pipe heating steam; Injector evenly sprays seawater above the tube bank of transverse tube heat exchanger; Form under the Film Flow on the transverse tube surface, seawater obtains degasification and part evaporation in this process, and heat exchanger effectiveness is high.Heating steam is introduced into first and imitates; Its heat of condensation makes the almost evaporation of seawater of equivalent, and through repeatedly evaporation and condensation, the vaporization temperature of back all is lower than front one effect; Thereby obtain being multiple times than the zero(ppm) water of quantity of steam, the condensation in sea water condenser of the steam of last effect.First imitates phlegma returns boiler, and the phlegma of other effects and sea water condenser is collected the back as product water.The operating temperature of low-temperature multi-effect seawater desalination device is less than 70 ℃, well below 110 ℃ of MSF device, so its energy consumption and wall erosion and scaling rate are all lower.Compare with MSF, the material of its apparatus body and heat-transfer pipe requires also lower.
(3) press steam distillation
Press the same low-temperature multi-effect of steam distilled desalinating process (MED) distillation method, different is to press steam distillation to use the low-down heat pump of hear rate, with the heating steam of compressed vapour as vaporizer heat pipe bundle, is a kind of desalination process of distilling efficiently.Compression can be adopted steam injector, is called thermo compression (TVC); Or adopt the mechanical vapour compressor, and promptly mechanically compress (MVC) is the desalination techniques that only relies on electric energy, as long as electricity is arranged, just can produce fresh water, because the restriction of machine by compression, the capacity of its unitary device is little than other water distilling apparatus.In low-temperature multi-effect (LT-MED) sea water distiling plant system; As the heating steam pressure that provides is higher; For carrying the high yield water ratio, general normal employing LT-MED and thermo compression (TVC) bonded desalting equipment, promptly low-temperature multi-effect adds the desalting equipment (MED+EC) of steam injector.
Summary of the invention
The present invention is intended to overcome the deficiency of prior art, can effectively improve sea water desaltination efficient and energy utilization rate, can move at low temperatures simultaneously, and safe and reliable.
A kind of novel heat pipe-type low-temperature multiple-effect seawater desalination system; Comprise heat pipe-type multiple-effect evaporator, steam injector, water cooler, air water tripping gear, steam separator, water ring vacuum pump, sea water booster pump, see through liquid pump, Steam Turbine Through IP Admission, turbine low pressure cylinder; It is characterized in that said heat pipe-type multiple-effect evaporator is many groups;
First group of heat pipe-type multiple-effect evaporator (1), second group of heat pipe-type multiple-effect evaporator (2) and the 3rd group of heat pipe-type multiple-effect evaporator (3) parallel connection;
Water ring vacuum pump (8) links to each other with first group of heat pipe-type multiple-effect evaporator (1), second group of heat pipe-type multiple-effect evaporator (2), the 3rd group of heat pipe-type multiple-effect evaporator (3);
Dense water pipe (17) is connected with first group of heat pipe-type multiple-effect evaporator (1), second group of heat pipe-type multiple-effect evaporator (2), the 3rd group of heat pipe-type multiple-effect evaporator (3);
The fresh water interface of second group of heat pipe-type multiple-effect evaporator (2), the 3rd group of heat pipe-type multiple-effect evaporator (3) and water cooler (5) with see through liquid pump (10) and link to each other.
According to heat pipe-type low-temperature multiple-effect seawater desalination of the present invention system; It is characterized in that it comprises many group heat pipe-type multiple-effect evaporators, steam injector, water cooler, air water tripping gear, steam separator, water ring vacuum pump, sea water booster pump, sees through liquid pump, Steam Turbine Through IP Admission, turbine low pressure cylinder etc., also comprises the distribution of steam, fresh water and dense water between the heat pipe-type multiple-effect evaporator etc.
Mainly utilize the Heat Transfer of Heat Pipe on Heat Pipe performance, and heat inferior steam turbine low-pressure steam discharge and cyclic steam through steam injector, safe operation under the low temperature that can guarantee is to improve system efficiency and Energy efficiency.
Above-mentioned heat pipe-type low-temperature multiple-effect seawater desalination system adopts two or more heat pipe-type multiple-effect evaporators mode arranged side by side, when implement device maximizes, has avoided the difficulty of transportation, installation.
The technical process that utilizes above-mentioned low-temperature multiple-effect seawater desalination system to carry out sea water desaltination may further comprise the steps at least: (1) heat pipe-type multiple-effect evaporator is divided into some groups of parallel connections; Saturated vapor dilatation heat release in water cooler of (2) discharging in last group heat pipe-type multiple-effect evaporator, and heat seawater by the sea-water pump adherence pressure, the steam overwhelming majority is condensed into fresh water, and remainder is a cyclic steam, gets into steam injector; (3) seawater after the heating is discharged incondensable gas through the air water tripping gear; (4) seawater after the degassing gets into the sprinkling system of respectively organizing the multiple-effect heat pipe evaporator, and under the distribution of sprinkling system, to heat pipe, vaporize under the heating of heat pipe by start vaporizer by atomized spray for seawater; The seawater that is evaporated in (5) first groups of heat pipe-type multiple-effect evaporators gets into second group of heat pipe-type multiple-effect evaporator through steam separator, and as the thermal source of its heating, steam is cooled to fresh water simultaneously; By that analogy, enter water cooler until steam.Steam passes through evaporation and condensation repeatedly, one group of seawater after the last group of steam heating that produces, and promptly one group vaporization temperature is lower than one group of front at the back, thereby obtains being multiple times than the zero(ppm) water of quantity of steam; (6) extract a certain amount of high-quality steam out from Steam Turbine Through IP Admission; Through steam injector with the cyclic steam of discharging in the part steam discharge of injection turbine low pressure cylinder and the water cooler; After putting forward its steam quality; Enter first group of heat pipe-type multiple-effect evaporator uniformly by steam-pipe, the heat pipe hot arc is by steam heating, and steam is condensed; The seawater of the other end heating atomization of heat pipe, the secondary steam that is produced by seawater is passing vapour liquid separator, to improve the purity of fresh water, acts on the thermal source of second group of heat pipe-type multiple-effect evaporator; Part in (7) first groups of heat pipe-type multiple-effect evaporators not condensing vapour gets into next group, and its condensed water is recycled to condenser hotwell, to raise the efficiency; (8) this evaporation and condensation process repeat along many groups heat pipe-type multiple-effect evaporator, and every group has all produced a considerable amount of fresh water, the steam that the 3rd group of heat pipe-type multiple-effect evaporator discharged in water cooler by the seawater condensation; (9) fresh water is delivered to fresh-water tank through seeing through liquid pump, and dense water drains into outside the system through dense water pipe, and the steam of generation is able to recycle.(10) evaporator system has Butterworth Hatch, after operation for some time, according to pressure reduction, to clean the heat pipe-type multiple-effect evaporator.
In the above-mentioned steps (4), steam is got into by left channel, gets into steam side and begins to wash away heat pipe; Heat pipe is activated and just automatically heat is conducted to top; At this moment heat pipe heating zone heat absorption, vapour stream temperature behind heat pipe descends and begins to condense, and heat is by the heat pipe absorption and conduct to condensation segment; When the heat pipe heating zone is heated, the rapid carburation by evaporation of the liquid in the kapillary, steam flows to condensation segment under small pressure reduction; Under the cooling of seawater; Discharge heat, regelation becomes liquid, and liquid leans on the effect of capillary force to flow back to heating zone along porous material again; So circulation is more than, and heat reaches an other end by heat pipe one end.This circulation is carried out fast, and heat can be come by conduction continuously.Heat pipe is in the process that realizes this transfer of heat, thus seawater heat absorption evaporation.
In the above-mentioned steps (5), the seawater of the heating back degassing is under the effect of nozzle; Spray heat pipe condenser section process heat release at this moment on the heat pipe uniformly,, make its heating vaporization the seawater of heat transferred atomizing; During through steam separator, because vapour, current direction are orthogonal, the cf-when steam flow is turned is separated water droplet; Stick to the very thin moisture film of formation on the corrugated plate, lean on gravity slowly to flow downward, form bigger water droplet in the lower end of plate and fall; Thereby carry out carbonated drink separation, steam flows out from the right side and gets into next effect steam side.The seawater eroding concentrated water drainage of vaporization does not go out; This evaporation and condensation process repeat along each effect of a string vaporizer always; Next one imitates vaporization temperature all is lower than front one effect; Every effect has all produced a considerable amount of zero(ppm) water; Last effect steam by the seawater condensation, is collected zero(ppm) water with vaporizer and is drawn as product water in water cooler, extracts and deliver to fresh-water tank out by seeing through liquid pump.
[0014]Compared with prior art, meliority of the present invention is: 1, efficient is high: under the efficient effect through heat pipe, improve system efficiency; 2, can realize sea water desaltination under the low temperature, because the decision of the characteristic of heat pipe, avoid simultaneously or slowed down corrosion on Equipment and fouling; 3, energy utilization rate is high: because make full use of inferior turbine low pressure cylinder steam discharge; 4, turndown ratio is big, and load can from 40% to 110% changes, and water generation ratio can not descend; 5, product water water quality is better, can be used for boiler of power plant supplementary feed or extensive municipal water use; 6, system operation is safe and reliable, leaks even if heat-transfer pipe takes place, and can not influence water quality; 7, pre-treatment is simpler, for the seawater quality that changes very strong flexibility is arranged, and chemical consumption is lower.
Description of drawings
Accompanying drawing 1 is a heat pipe-type low-temperature multiple-effect seawater desalination system diagram involved in the present invention.
Embodiment
Below in conjunction with accompanying drawing and specific examples the present invention is done and to describe in further detail.
The explanation of major parts and details Reference numeral in the Figure of description:
Second group of heat pipe-type multiple-effect evaporator of 1---first group of heat pipe-type multiple-effect evaporator 2---
3---the 3rd group of heat pipe-type multiple-effect evaporator 4---steam injector
5---water cooler 6---gas release device
7---steam separator 8---water ring vacuum pump
9---sea water booster pumps 10---see through liquid pump
11---Steam Turbine Through IP Admission 12---turbine low pressure cylinder
13---heat pipe 14---dividing plate
15---sprinkling system 16---vapour distributor
17---dense water pipe 18---cyclic steam pipe
Below in conjunction with accompanying drawing and specific embodiment the present invention is done and to describe in further detail:
A kind of novel heat pipe-type low-temperature multiple-effect seawater desalination system (see figure 1) is characterized in that it comprises first group of heat pipe-type multiple-effect evaporator (1), second group of heat pipe-type multiple-effect evaporator (2), the 3rd group of heat pipe-type multiple-effect evaporator (3), steam injector (4), water cooler (5), air water tripping gear (6), steam separator (7), water ring vacuum pump (8), sea water booster pump (9), sees through liquid pump (10), Steam Turbine Through IP Admission (11), turbine low pressure cylinder (12), heat pipe (13), dividing plate (14), sprinkling system (15), vapour distributor (16), dense water pipe (17), cyclic steam pipe (18).Be that example further describes its technical process with this instance below:
First group of heat pipe-type multiple-effect evaporator (1), second group of heat pipe-type multiple-effect evaporator (2) and the 3rd group of heat pipe-type multiple-effect evaporator (3) parallel connection;
Saturated vapor dilatation heat release in water cooler (5) of discharging in the 3rd group of heat pipe-type multiple-effect evaporator (3); And heating is by the seawater of sea water booster pump (9) adherence pressure; The steam overwhelming majority is condensed into fresh water, and remainder is cyclic steam (18), gets into steam injector (4);
Seawater after the heating is discharged incondensable gas through gas release device (6);
Seawater after the degassing gets into the sprinkling system (15) of respectively organizing the multiple-effect heat pipe evaporator, and under the distribution of sprinkling system (15), to heat pipe (13), vaporize under the heating of heat pipe (13) by start vaporizer by atomized spray for seawater;
The seawater that is evaporated in first group of heat pipe-type multiple-effect evaporator (1) gets into second group of heat pipe-type multiple-effect evaporator (2) through steam separator, and as the thermal source of its heating, steam is cooled to fresh water simultaneously; By that analogy, enter water cooler (5) until steam.Steam passes through evaporation and condensation repeatedly, one group of seawater after the last group of steam heating that produces, and promptly one group vaporization temperature is lower than one group of front at the back, thereby obtains being multiple times than the fresh water of quantity of steam;
Extract a certain amount of high-quality steam out from Steam Turbine Through IP Admission (11); Portion's steam discharge and the middle cyclic steam (18) of discharging of water cooler (5) through steam injector (4) injection turbine low pressure cylinder (12); After putting forward its steam quality; Enter first group of heat pipe-type multiple-effect evaporator (1) uniformly by steam-pipe, heat pipe (13) hot arc is by steam heating, and steam is condensed simultaneously; The seawater of the other end heating atomization of heat pipe (13), the secondary steam that is produced by seawater is passing steam separator (7), and to improve the purity of fresh water, the steam that warp purifies is as the thermal source of second group of heat pipe-type multiple-effect evaporator (2);
Part in first group of heat pipe-type multiple-effect evaporator (1) not condensing vapour gets into second group of heat pipe-type multiple-effect evaporator (2), and its condensed water is recycled to condenser hotwell, to raise the efficiency;
This evaporation and condensation process repeat along many groups heat pipe evaporator, and every group has all produced a considerable amount of fresh water, the steam that the 3rd group of heat pipe-type multiple-effect evaporator (3) discharged in water cooler (5) by the seawater condensation;
Fresh water is delivered to fresh-water tank through seeing through liquid pump (10), and dense water drains into outside the system through dense water pipe (17), and the steam of generation is able to recycle;
There is Butterworth Hatch in heat pipe-type multiple-effect evaporator system, after operation for some time, according to pressure reduction, to clean multiple-effect evaporator.
The above; Be merely the preferable embodiment of the present invention; But protection scope of the present invention is not limited thereto, any technician who is familiar with the present technique field in the technical scope that the present invention discloses, the variation that can expect easily or replacement; Even make a lot of distortion, these all belong to the row of protection of the present invention.

Claims (1)

1. novel heat pipe-type low-temperature multiple-effect seawater desalination system; Comprise heat pipe-type multiple-effect evaporator, steam injector, water cooler, air water tripping gear, steam separator, water ring vacuum pump, sea water booster pump, see through liquid pump, Steam Turbine Through IP Admission, turbine low pressure cylinder; It is characterized in that said heat pipe-type multiple-effect evaporator is many groups;
First group of heat pipe-type multiple-effect evaporator (1), second group of heat pipe-type multiple-effect evaporator (2) and the 3rd group of heat pipe-type multiple-effect evaporator (3) parallel connection;
Water ring vacuum pump (8) links to each other with first group of heat pipe-type multiple-effect evaporator (1), second group of heat pipe-type multiple-effect evaporator (2), the 3rd group of heat pipe-type multiple-effect evaporator (3);
Dense water pipe (17) is connected with first group of heat pipe-type multiple-effect evaporator (1), second group of heat pipe-type multiple-effect evaporator (2), the 3rd group of heat pipe-type multiple-effect evaporator (3);
The fresh water interface of second group of heat pipe-type multiple-effect evaporator (2), the 3rd group of heat pipe-type multiple-effect evaporator (3) and water cooler (5) with see through liquid pump (10) and link to each other.
CN2011204995773U 2011-12-05 2011-12-05 Heat pipe type low-temperature multi-effect seawater dilution system Expired - Lifetime CN202542898U (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103641192A (en) * 2013-12-24 2014-03-19 上海电气电站设备有限公司 Multi-tube-bundle arrangement structure of low-temperature multi-effect sea water desalination evaporator
CN105439224A (en) * 2015-11-23 2016-03-30 江苏润海能源科技有限公司 Pressurized steam type capillary drive sea water desalination system
CN112044108A (en) * 2020-09-07 2020-12-08 广西田东锦鑫化工有限公司 Double-stock solution flash evaporation double-six-effect evaporator

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103641192A (en) * 2013-12-24 2014-03-19 上海电气电站设备有限公司 Multi-tube-bundle arrangement structure of low-temperature multi-effect sea water desalination evaporator
CN103641192B (en) * 2013-12-24 2015-12-30 上海电站辅机厂有限公司 Low-temperature multiple-effect seawater desalination evaporator multitubular bundles arrangement
CN105439224A (en) * 2015-11-23 2016-03-30 江苏润海能源科技有限公司 Pressurized steam type capillary drive sea water desalination system
CN105439224B (en) * 2015-11-23 2018-07-10 江苏润海能源科技有限公司 A kind of pressed-steam type REFRIGERATION SYSTEM DRIVEN BY CAPILLARY FORCE seawater desalination system
CN112044108A (en) * 2020-09-07 2020-12-08 广西田东锦鑫化工有限公司 Double-stock solution flash evaporation double-six-effect evaporator

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Owner name: NATIONAL ELECTRIC NEW ENERGY TECHNOLOGY INSTITUTE

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Patentee after: Beijing Lucency Enviro-Tech. Co., Ltd.

Patentee after: Guodian New Energy Technology Institute

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Patentee before: Beijing Lucency Enviro-Tech. Co., Ltd.

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Granted publication date: 20121121

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