KR100745963B1 - Freshwater apparatus of seawater - Google Patents

Freshwater apparatus of seawater Download PDF

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Publication number
KR100745963B1
KR100745963B1 KR1020060105031A KR20060105031A KR100745963B1 KR 100745963 B1 KR100745963 B1 KR 100745963B1 KR 1020060105031 A KR1020060105031 A KR 1020060105031A KR 20060105031 A KR20060105031 A KR 20060105031A KR 100745963 B1 KR100745963 B1 KR 100745963B1
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South Korea
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condensate
pipe
steam
seawater
stage
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KR1020060105031A
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Korean (ko)
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박금서
김점석
구본근
남형식
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두산중공업 주식회사
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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
    • C02F1/26—Treatment of water, waste water, or sewage by extraction
    • C02F1/265—Desalination
    • 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
    • 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
    • C02F2201/00—Apparatus for treatment of water, waste water or sewage
    • C02F2201/002—Construction details of the apparatus
    • 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)
  • Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)

Abstract

A seawater desalination system using waste heat, which can reduce the consumption of steam in a power generating plant by recovering condensation water generated in a brine heater into a steam generator or flash vessel, heat exchanging the recovered condensation water with waste gas having waste heat or in a heat recovery steam generator to produce low pressure steam, thereby supplying the low pressure steam into the brine heater again, is provided. A seawater desalination system comprises: a steam generator(70) into which a portion of the condensation water in the condensation water recovery pipe flows through a pipe(71) connected to the condensation water recovery pipe in a process of sending condensation water generated in a brine heater(20) to a power generating plant(60) through a condensation water recovery pipe(51) to reuse the condensation water; a waste gas supplying pipe(81) connected to the steam generator such that waste gas of a heat recovery steam generator(80) is exhausted to the atmosphere through the waste gas supplying pipe; a steam supplying pipe(72) connected to the brine heater to supply the steam into the brine heater again when steam is generated after waste gas is heat exchanged with condensation water in the steam generator by the waste gas supplying pipe; and a condensation water re-recovering pipe(91) connected to the condensation water recovery pipe such that condensation water produced in the steam generator is flown in and recovered again in the condensation water recovery pipe installed to send condensation water in the brine heater to the power generating plant.

Description

해수담수화장치{Freshwater Apparatus of Seawater}Freshwater Apparatus of Seawater

도 1은 본 발명에 따른 제 1실시예를 나타낸 개략적인 설명도, 1 is a schematic explanatory diagram showing a first embodiment according to the present invention;

제 2도는 본 발명에 따른 제 2실시예를 나타낸 개략적인 설명도이다. 2 is a schematic explanatory diagram showing a second embodiment according to the present invention.

* 도면의 주요부분에 대한 부호설명 * * Explanation of Signs of Major Parts of Drawings *

1 : 증발기1: evaporator

10 : 스테이지부10: stage part

11 : 1번 스테이지11: Stage 1

20 : 농염수가열기20: concentrated brine heater

21 : 스팀공급관21: steam supply pipe

30 : 해수공급배관30: seawater supply piping

40 : 농염수공급펌프40: concentrated brine supply pump

50 : 응축수회수펌프50: condensate recovery pump

51 : 응축수회수배관51: condensate recovery pipe

60 : 발전설비60: power generation equipment

70 : 스팀발생기70: steam generator

71 : 배관71: piping

72 : 스팀공급배관72: steam supply piping

80 : HRSG80: HRSG

81 : 폐가스공급배관81: waste gas supply piping

90 : 응축수재회수펌프90: condensate recovery pump

91 : 응축수재회수배관91: condensate recovery pipe

100 : 증발기100: evaporator

101 : 배관101: plumbing

102 : 응축수재순환배관102: condensate recirculation piping

103 : 스팀공급배관103: steam supply piping

110 : 응축수재순환펌프110: condensate recirculation pump

본 발명은 해수담수화장치에 관한 것으로, 더욱 상세하게는 응축수의 일부를 스팀발생기 또는 증발기(flash vessel)를 거쳐서 발전설비의 폐열 또는 HRSG내에서 열교환되도록 하여 저압의 스팀을 생성하고, 이 스팀을 다시 농염수가열기안으로 재공급하여 원래 공급되는 저압스팀의 소모량을 줄일 수 있도록 한 해수담수화장치에 관한 것이다. The present invention relates to a seawater desalination apparatus, and more particularly, a part of the condensate is heat-exchanged in a waste heat or HRSG of a power plant through a steam generator or a flash vessel to generate low pressure steam, and the steam is again The present invention relates to a seawater desalination device that can reduce the consumption of the low pressure steam originally supplied by refeeding it into the brine heater.

일반적으로 해수 담수화장치에서 순환농염수(Recycling Brine)는 농염수 순환펌프(Brine Recirculation Pump)에 의하여 각각의 열회복구간(Heat Rejection Section)의 응축기 내부를 흘러 농염수가열기(Brine Heater)에 유입되어 농염수가 열기 튜브 바깥쪽으로 흐르는 저압증기(Low Pressure Steam)의 응축열을 이용하여 가열된다. In general, in a seawater desalination system, recycled brine flows into the condenser of each heat recovery section by a brine recirculation pump and flows into the brine heater. Concentrated brine is heated by the heat of condensation of low pressure steam flowing out of the hot tube.

상기 가열된 순환농염수는 순차적으로 낮은 압력으로 유지되고 있는 스테이지(Stage)의 증발실(Flash Chamber)로 유입된다. 가열된 순환농염수의 유입은 증발실 주변의 낮은 압력으로 인하여 맹렬한 증발(Flashing)이 유도된다. The heated circulating brine is sequentially introduced into a flash chamber of a stage maintained at a low pressure. The inflow of heated circulating brine leads to intense flashing due to the low pressure around the evaporation chamber.

이러한 증발 현상은 유입된 순환농염수가 그 스테이지의 압력에 해당하는 끓는점까지 냉각되는 동안 계속된다. 그리고, 다음 스테이지로 유입되어 이와 같은 과정을 반복하게 되며 점점 농도가 증가하게 된다. This evaporation continues while the incoming circulating brine is cooled to the boiling point corresponding to the pressure of the stage. Then, it enters the next stage and repeats this process, and the concentration gradually increases.

최종 스테이지에 이르러 전체 순환농염수의 농도를 조정하기 위하여 일부는 농염수배출펌프(Brine Blowdown Pump)밖으로 배출된다. 생성된 증기는 기수분리기(Demister)를 지나 포함되어 있을 수 있는 염의 알갱이들을 제거한다. 그리고, 스테이지의 응축기부로 유입되어 튜브 내부를 흐르는 순환농염수에 의하여 담수로 응축된다. 이렇게 각각의 스테이지에서 생성된 담수를 담수펌프(Distillate Pump)를 이용하여 후처리공정으로 이송하게 된다. In order to adjust the concentration of the total circulating brine to reach the final stage, some are discharged out of the brine blowdown pump. The resulting steam removes grains of salt that may be contained past the demister. Then, it is condensed into fresh water by the circulating brine flowing into the condenser part of the stage and flowing inside the tube. The fresh water produced in each stage is transferred to the aftertreatment process using a distillate pump.

여기서, 증발기(Evaporator)는 스팀의 열에너지를 이용하여 가열된 해수로부터 연속적인 증발, 응축의 과정을 통하여 담수를 분리하는 설비이다. 증발기는 여러개(대략 19 ~ 30개)의 스테이지로 구성되며, 각각의 스테이지는 응축기, 기수분리기, 그리고 증발실로 구성되어 있다. Here, the evaporator is a facility for separating fresh water from the seawater heated by using the thermal energy of steam through the process of continuous evaporation, condensation. The evaporator consists of several stages (approximately 19-30), each stage consisting of a condenser, a separator and an evaporation chamber.

이러한 종래의 담수화장치는 발전설비로부터 필요한 열원인 스팀을 공급받도록 되어 있다. 이 스팀은 발전소에서 추가로 전기를 생산할 수 있는 양질로서, 사 용량이 많을 수록 운전비용이 상승하는 요인으로 작용한다. 따라서, 종래의 MSF방식의 장치에서, 열효율을 향상시키기 위해서는 증발기내의 전열면적과 스테이지수를 늘려야하기때문에, 설치공간을 많이 차지하게되고, 그에따라 제작비용이 증대되는 문제점이 있었다. The conventional desalination apparatus is to receive steam, which is a necessary heat source, from a power generation facility. This steam is of good quality to generate additional electricity in the power plant, which increases the operating cost with higher usage. Therefore, in the conventional MSF type apparatus, since the heat transfer area and the number of stages in the evaporator must be increased in order to improve the thermal efficiency, it takes up a lot of installation space, and accordingly, there is a problem in that the manufacturing cost increases.

이에 본 발명은 상기와 같은 종래의 제반 문제점을 해결하기 위해 발명된 것으로서, 농염수가열기내에서 발생하는 응축수를 스팀발생기 또는 증발기내로 회수하여 폐열을 가지고 있는 폐가스 또는 HRSG내에서 열교환시켜서 저압스팀을 생성하여 다시 농염수가열기내로 재공급되도록 하므로써, 발전설비의 스팀소모량을 줄일 수 있도록 한 폐열을 이용한 해수담수화장치를 제공함에 발명의 목적이 있다. Accordingly, the present invention is invented to solve the above-mentioned conventional problems, to recover the condensate generated in the concentrated brine heater in the steam generator or evaporator to generate a low pressure steam by heat exchange in waste gas or HRSG having waste heat It is an object of the present invention to provide a seawater desalination apparatus using waste heat to reduce the steam consumption of the power plant by being re-supplied into the concentrated brine heater.

상기와 같은 목적을 달성하기 위한 본 발명은 다단으로 이루어지면서 열회복구간과 열차단구간으로 나뉘는 스테이지부를 포함하는 증발기와; 상기 스테이지부를 통과하여 농염수가열기를 지나서 1번 스테이지안으로 연결되어 해수를 공급하는 해수공급배관과; 상기 농염수가열기안으로 유입되는 스팀이 응축되면서 고온화된 상기 해수공급배관을 통해 다시 스테이지부의 각 스테이지안으로 넘어가면서 증발이 일어나고, 이러한 증발과 함께 해수공급배관의 접촉에 의해 담수를 생성시키는 해수담수화장치에 있어서, 응축수회수배관을 통해 농염수가열기내에서 발생한 응축수를 발전설비로 재사용가능하도록 보내는 과정중, 상기 응축수회수배관과 연결되는 배관을 통해 응축수회수배관안의 응축수의 일부가 유입되도록 하는 스팀발생기 와; 상기 스팀발생기와 연결되어서 HRSG의 폐가스가 통과하여 대기중으로 배출되도록 하는 폐가스공급배관과; 상기 폐가스공급배관에 의해 상기 스팀발생기내에서 응축수와 열교환이 이루어진 후 발생하는 스팀을 다시 농염수가열기안으로 재공급되도록 연결된 스팀공급배관과; 상기 농염수가열기안의 응축수를 발전설비로 보내기위해 설치된 상기 응축수회수배관안에, 상기 스팀발생기안에서 생성된 응축수가 유입되어 재회수되도록 상기 응축수회수배관과 연결된 응축수재회수배관으로 구성된 것을 기술적 특징으로 한다.The present invention for achieving the above object is made of a multi-stage evaporator comprising a stage portion divided into a heat recovery section and a heat shield section; A seawater supply pipe passing through the stage and passing through the concentrated brine heater into the first stage to supply seawater; As the steam flowing into the concentrated brine condenser is condensed, the evaporation takes place through the seawater supply pipe, which is heated, back into each stage of the stage, and generates fresh water by contacting the seawater supply pipe with the evaporation. In the process of sending the condensate generated in the concentrated brine heater through the condensate recovery pipe to be reusable to the power plant, a steam generator for introducing a portion of the condensate in the condensate recovery pipe through the pipe connected to the condensate recovery pipe; A waste gas supply pipe connected to the steam generator to allow waste gas of the HRSG to pass through and discharge into the atmosphere; A steam supply pipe connected to supply the steam generated after the heat exchange with the condensed water in the steam generator by the waste gas supply pipe again into the concentrated brine heater; In the condensate recovery pipe installed to send the condensate in the concentrated brine heater to the power generation facility, it characterized in that the condensate recovery pipe connected to the condensate recovery pipe connected to the condensate recovery pipe so that the condensate generated in the steam generator is re-introduced.

상기 스팀발생기안에서 생성된 응축수를 응축수재회수배관을 통해 재회수도록 응축수재회수배관상에 응축수회수펌프가 구비된 구조이다. A condensate recovery pump is provided on the condensate recovery pipe so that the condensate generated in the steam generator is recovered through the condensate recovery pipe.

또한, 본 발명은 다단으로 이루어지면서 열회복구간과 열차단구간으로 나뉘는 스테이지부를 포함하는 증발기와; 상기 스테이지부를 통과하여 농염수가열기를 지나서 1번 스테이지안으로 연결되어 해수를 공급하는 해수공급배관과; 상기 농염수가열기안으로 유입되는 스팀이 응축되면서 고온화된 해수공급배관을 통해 다시 스테이지부의 각 스테이지안으로 넘어가면서 증발이 일어나고, 이러한 증발과 함께 해수공급배관의 접촉에 의해 담수를 생성시키는 해수담수화장치에 있어서, 응축수회수배관을 통해 농염수가열기내에서 발생한 응축수를 발전설비로 재사용가능하도록 보내는 과정중, 상기 응축수회수배관과 연결되는 배관을 통해 응축수회수배관안의 응축수의 일부가 유입되도록 하는 증발기와; 상기 증발기내의 응축수가 배출되어서 HRSG내에서 폐가스와 열교환하도록 하여 다시 증발기안으로 고온의 상태로 유입되어 증발되면서 스팀이 형성되도록 연결된 응축수재순환배관과; 상기 증발기안 에서 발생된 스팀이 농염수가열기안으로 재공급되도록 연결된 스팀공급배관으로 구성된 것을 다른 기술적 특징으로 한다. In addition, the present invention consists of a multi-stage evaporator comprising a stage portion divided into a heat recovery section and a heat shield section; A seawater supply pipe passing through the stage and passing through the concentrated brine heater into the first stage to supply seawater; In the seawater desalination apparatus that the evaporation occurs as the steam flowing into the concentrated salt water condenser is condensed into the stage through the high temperature seawater supply pipe, and the fresh water is generated by contacting the seawater supply pipe with the evaporation. An evaporator for allowing a part of the condensate in the condensate return pipe to flow through the condensate return pipe through a conduit connected to the condensate return pipe during a process of sending condensate generated in the brine heater to the power generation facility through a condensate return pipe; A condensate recirculation pipe connected to discharge the condensed water in the evaporator to exchange heat with the waste gas in the HRSG and to be introduced into a high temperature into the evaporator to evaporate and to form steam; Another technical feature is that the steam generated in the evaporator is composed of a steam supply pipe connected to be supplied back to the concentrated brine heater.

상기 HRSG쪽으로 응축수가 공급되도록 하는 응축수재순환배관상에 응축수재순환펌프가 구비된 구조이다. The condensate recirculation pump is provided on the condensate recirculation pipe to supply the condensate to the HRSG.

이하, 본 발명의 바람직한 실시예를 첨부된 예시도면에 의거 상세하게 설명한다. Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

도 1은 본 발명에 따른 제 1실시예를 나타낸 개략적인 설명도, 제 2도는 본 발명에 따른 제 2실시예를 나타낸 개략적인 설명도이다.1 is a schematic explanatory diagram showing a first embodiment according to the present invention, and FIG. 2 is a schematic explanatory diagram showing a second embodiment according to the present invention.

[제 1실시예] [First Embodiment]

본 발명은 도 1에 도시된 바와 같이, 다단으로 이루어지면서 열회복구간과 열차단구간으로 나뉘는 스테이지부(10)를 포함하는 증발기(1)와; 상기 스테이지부(10)를 통과하여 농염수가열기(20)를 지나서 1번 스테이지(11)안으로 연결되는 해수공급배관(30)으로 해수를 공급하는 농염수공급펌프(40)와; 상기 농염수가열기(20)안으로 유입되는 스팀이 응축되면서 고온화된 해수공급배관(30)을 통해 다시 스테이지부(10)의 각 스테이지안으로 넘어가면서 증발이 일어나고, 이러한 증발과 함께 해수공급배관(30)의 접촉에 의해 담수를 생성시키는 해수담수화장치이다.As shown in FIG. 1, the present invention comprises an evaporator (1) comprising a stage portion (10) divided into a heat recovery section and a heat recovery section, consisting of multiple stages; A brine supply pump 40 for supplying seawater to the seawater supply pipe 30 connected to the first stage 11 through the brine water heater 20 through the stage unit 10; As the steam introduced into the concentrated salt water heater 20 is condensed, the evaporation occurs while passing back into the respective stages of the stage unit 10 through the high temperature seawater supply pipe 30, and with such evaporation, the seawater supply pipe 30 Seawater desalination apparatus to generate fresh water by contact of

상기 스테이지부(10)는 편의상 1~19개의 스테이지로 구성하여 설명하며, 도면상에는 각각 숫자를 기재하여 구분하였고, 해수가 담수화되어가는 과정은 다단증발법에 관한 것으로, 통상적이고, 본 발명의 요지와는 크게 상관이 없으므로, 상세한 설명은 생략한다. The stage unit 10 is described for the convenience consisting of 1 to 19 stages, described on the drawings, each divided by a number, the process of desalination of seawater relates to a multi-stage evaporation method, the general, the gist of the present invention Since it does not have much to do with it, detailed description is omitted.

여기서, 본 발명은 응축수회수펌프(50)에 의해 응축수회수배관(51)을 통해 농염수가열기(20)내에서 발생한 응축수를 발전설비(60)로 재사용가능하도록 보내는 과정중, 상기 응축수회수배관(51)과 연결되는 배관(71)을 통해 응축수회수배관(51)안의 응축수의 일부가 유입되도록 하는 스팀발생기(70)가 설치된다.Here, the present invention in the process of sending the condensate generated in the concentrated brine heater 20 through the condensate recovery pipe 51 by the condensate recovery pump 50 to be reusable to the power plant 60, the condensate recovery pipe ( A steam generator 70 is installed to allow a part of the condensate in the condensate return pipe 51 to flow through the pipe 71 connected to the 51.

또한, 상기 스팀발생기(70)와 연결되어서 HRSG(80)의 열기를 동반하고 있는폐가스가 통과하여 대기중으로 방출되도록 하는 폐가스공급배관(81)이 구비된다.In addition, the waste gas supply pipe 81 is connected to the steam generator 70 so that the waste gas accompanying the heat of the HRSG 80 passes through and is discharged into the atmosphere.

또한, 상기 폐가스공급배관(81)에 의해 상기 스팀발생기(70)내에서 응축수와 열교환이 이루어진 후 발생하는 스팀을 다시 농염수가열기(20)안으로 재공급되도록 연결된 스팀공급배관(72)이 설치된다.In addition, a steam supply pipe 72 is installed to re-supply steam generated after heat exchange with condensate in the steam generator 70 by the waste gas supply pipe 81 into the concentrated brine heater 20. .

또한, 상기 스팀발생기(70)안의 응축수를 응축수재회수펌프(90)를 통해 받아서 농염수가열기(20)안의 응축수를 발전설비(60)로 보내기위해 설치된 상기 응축수회수배관(51)안에 유입되어 재회수되도록 상기 응축수회수배관(51)과 연결된 응축수재회수배관(91)으로 구성된다. In addition, the condensate in the steam generator (70) through the condensate water recovery pump (90) is introduced into the condensate recovery pipe (51) installed to send the condensate in the brine heater 20 to the power generation facility (60) and reunited. The condensate return pipe (91) is connected to the condensate return pipe (51) so that it can be.

상기 HRSG(80)는 "Heat Recovery Steam Generator"의 약자로서, 배열회수증기발생기이며, 이 배열회수증기발생기에서 발생되는 폐가스에서 동반되고 있는 폐열을 이용하는 것이다. The HRSG 80 is an abbreviation for "Heat Recovery Steam Generator," and is a waste heat recovery steam generator, and uses waste heat entrained in the waste gas generated in the waste heat recovery steam generator.

이러한 구성을 가지는 본 발명의 제 1실시예에 따른 해수담수화장치는 농염수가열기(20)안으로 스팀공급관(21)을 통해 저압스팀이 공급되고, 이때 농염수공급펌프(40)의 작동으로, 해수가 해수공급배관(30)을 통해 다단으로 이루어진 스테이지부(10)의 내부를 통과하여 상기 농염수가열기(20)안을 관통하여 다시 1번 스테이 지(11)안으로 유입되는데, 농염수가열기(20)안에서 해수공급배관(30)부분과 스팀과의 열교환으로 응축수가 발생한다. In the seawater desalination apparatus according to the first embodiment of the present invention having such a configuration, a low pressure steam is supplied through the steam supply pipe 21 into the concentrated salt water heater 20, and at this time, by operating the concentrated salt water supply pump 40, seawater Is passed through the interior of the stage portion 10 consisting of a multi-stage through the seawater supply pipe 30 and penetrates into the concentrated brine heater 20 again into the stage 11, the brine heater 20 Condensate is generated by heat exchange between the seawater supply pipe 30 and steam.

이 발생된 응축수는 농염수가열기(21)의 하부에 연통되게 설치된 응축수회수배관(51)을 통해 발전설비(60)로 재공급되어 사용되도록 한다.This generated condensed water is supplied back to the power generation facility 60 through the condensate recovery pipe 51 installed in communication with the lower portion of the brine heater 21 to be used.

여기서, 본 발명은 상기 응축수회수배관(51)상에 별도의 배관(71)을 연결하고, 이 배관(71)은 다시 스팀발생기(70)와 연결되어 있어 응축수회수배관(51)을 통해 응축수의 일부가 스팀발생기(70)안으로 유입된다. 이 상태에서, HRSG(80)로부터 발생된 폐가스가 폐가스공급배관(81)을 통해 스팀발생기(70)안으로 유입되어서 상기 응축수와 열교환되면서 스팀이 발생된다. Here, the present invention is connected to a separate pipe 71 on the condensate recovery pipe 51, the pipe 71 is again connected to the steam generator 70 of the condensate through the condensate recovery pipe 51 Some flow into the steam generator 70. In this state, the waste gas generated from the HRSG 80 flows into the steam generator 70 through the waste gas supply pipe 81 and heat-exchanges with the condensate to generate steam.

이때 발생된 스팀의 압력은 상기 스팀공급관(21)을 통해 유입되는 스팀의 압력보다 상대적으로 높은 압력이 된다. 이것은, 만일 스팀발생기에서 열전달로 상변화만 발생하면, 그 온도에서 새츄레이션(saturation)압력이 되지만, 추가적으로 열량을 더 공급하면, 과열도가 증가하고, 주어진 부피에서 압력이 추가적으로 상승하게되므로, 농염수가열기(20)안에 스팀공급관(21)을 통해 공급되는 스팀보다 상기 스팀발생기(70)안에서 발생된 스팀의 압력이 높게된다. 물론, 이때 스팀발생기(70)안에서에서의 열전달량의 일부는 과열시키는데 사용되므로, 열효율은 감소하게된다. At this time, the pressure of the generated steam becomes a pressure higher than the pressure of the steam flowing through the steam supply pipe (21). This is the saturation pressure at that temperature if only a phase change occurs in the heat transfer from the steam generator, but if additional heat is supplied, the superheat will increase and the pressure will increase further in the given volume. The pressure of steam generated in the steam generator 70 is higher than the steam supplied through the steam supply pipe 21 in the water heater 20. Of course, at this time, part of the heat transfer in the steam generator 70 is used to overheat, so that the thermal efficiency is reduced.

한편, 스팀발생기(70)안에 들어있는 응축수는 응축수재회수배관(91)을 통해 응축수재회수펌프(90)에 의해 재회수되어 응축수회수배관(51)안으로 재유입되어 발전설비로 보내지게된다. On the other hand, the condensate contained in the steam generator 70 is re-recovered by the condensate recovery pump 90 through the condensate recovery pipe (91) is re-introduced into the condensate recovery pipe 51 is sent to the power generation facility.

[제 2실시예]Second Embodiment

또한, 본 발명은 다른 실시예로서, 도 2에 도시된 바와 같이, 응축수회수펌프(50)에 의해 응축수회수배관(51)을 통해 농염수가열기(20)내에서 발생한 응축수를 발전설비(60)로 재사용가능하도록 보내는 과정중, 상기 응축수회수배관(51)과 연결되는 배관(101)을 통해 응축수회수배관(51)안의 응축수의 일부가 유입되도록 하는 증발기(100)가 구비되어 있다. In addition, as another embodiment of the present invention, as shown in Figure 2, the condensate generated in the concentrated brine heater 20 through the condensate recovery pipe 51 by the condensate recovery pump 50, the power generation equipment 60 In the process of sending to the reusable, the evaporator 100 is provided to allow a portion of the condensate in the condensate recovery pipe 51 through the pipe 101 is connected to the condensate recovery pipe 51.

또한, 본 발명은 상기 증발기(100)내의 응축수가 응축수재순환펌프(110)에 의해 배출되어서 HRSG(80)내에서 폐가스와 열교환하도록 하여 다시 증발기(100)안으로 고온의 상태로 유입되어 증발되면서 스팀이 형성되도록 연결된 응축수재순환배관(102)이 구비되고, 상기 증발기(100)안에서 발생된 스팀이 농염수가열기(20)안으로 재공급되도록 스팀공급관(21)과 연결된 스팀공급배관(103)으로 이루어진 구조이다. In addition, the present invention is the condensed water in the evaporator 100 is discharged by the condensate recirculation pump 110 to exchange heat with the waste gas in the HRSG (80) is introduced into the high temperature state into the evaporator 100 again to vaporize the steam The condensate recirculation pipe 102 is connected to be formed, and the steam generated in the evaporator 100 is a structure consisting of a steam supply pipe 103 connected to the steam supply pipe 21 to be supplied back into the concentrated brine heater (20). .

이러한 구성을 가지는 제 2실시예에 따른 본 발명은 스팀공급관(21)에 의해 저압의 스팀이 공급되는 농염수가열기(20)에서 발생하는 응축수를 응축수회수배관(51)을 통해 응축수회수펌프(50)에 의해 발전설비(60)로 보내지도록 한다.The present invention according to the second embodiment having such a configuration is a condensate recovery pump 50 through the condensate recovery pipe 51 to the condensate generated in the concentrated brine heater 20 is supplied with low-pressure steam by the steam supply pipe 21 To be sent to the power generation facility (60).

이때, 응축수회수배관(51)에는 배관(101)이 증발기(100)와 연결되어 있어 응축수의 일부가 상기 배관(101)을 통해 증발기(100)안으로 유입된다. 그러면, 증발기(100)와 HRSG(80)를 연결시킨 응축수재순환배관(102)에 의해 응축수재순환펌프(110)의 가동으로 응축수가 HRSG(80)를 통과하면서 열교환이 된 상태로 다시 증발기(100)안으로 유입된다. 유입된 응축수는 온도가 높아진 상태이므로, 증발 기(100)안에서 증발되어 스팀이 생성된다. 이 생성된 스팀은 상기 제 1실시예에서 설명한 바와 같이, 농염수가열기(20)안에 스팀공급관(21)을 통해 공급되는 스팀보다 상기 증발기(100)안에서 발생된 스팀의 압력이 높게되어 스팀공급관(21)과 연결된 스팀공급배관(103)을 통해 유동하여 농염수가열기(20)안으로 유입된다. At this time, the condensate recovery pipe 51 is connected to the evaporator 100 so that a part of the condensate is introduced into the evaporator 100 through the pipe 101. Then, the condensate recycle pump 110 is connected to the evaporator 100 and the HRSG 80 by the operation of the condensate recycle pump 110 so that the condensed water passes through the HRSG 80 and is heat exchanged again. Flows in. Since the introduced condensate is in a state where the temperature is high, steam is generated by evaporation in the evaporator 100. The generated steam has a higher pressure of steam generated in the evaporator 100 than the steam supplied through the steam supply pipe 21 in the concentrated salt water heater 20, as described in the first embodiment. 21 is flowed through the steam supply pipe 103 is connected to the concentrated brine heater 20 is introduced.

이와 같이 본 발명은 농염수가열기안에서 발생하는 응축수의 일부를 회수하여 별도 구비된 스팀발생기 또는 증발기를 통해 발전설비의 폐가스나 HRSG와 열교환하여 온도를 높여서 스팀을 생성한 다음, 이를 다시 농염수가열기안으로 재공급하므로써, 원래 공급되는 저압스팀의 양을 줄일 수 있으므로, 고가인 저압스팀 사용비용을 감소시킬 수 있게되고, 또한 HRSG의 보조연료사용이 감소되어 공해물질 배출량이 비례하여 감소되는 효과도 있다. As described above, the present invention recovers a part of the condensate generated in the concentrated brine heater to generate heat by heat exchange with waste gas or HRSG of the power generation facility through a steam generator or evaporator, and then raises the temperature to the brine heater. By resupplying, it is possible to reduce the amount of low-pressure steam originally supplied, thereby reducing the cost of using expensive low-pressure steam, and also reducing the use of auxiliary fuel by HRSG, thereby reducing the amount of pollutant emissions.

본 발명은 편의상 첨부된 예시도면에 의거 본 발명을 설명하였지만, 이에 국한되지 않고 본 발명의 기술적 사상의 범주내에서 여러가지 변형 및 수정이 가능함은 자명한 사실이다. Although the present invention has been described for convenience of the present invention with reference to the accompanying drawings, it is obvious that various modifications and changes are possible within the scope of the technical idea of the present invention.

Claims (4)

다단으로 이루어지면서 열회복구간과 열차단구간으로 나뉘는 스테이지부를 포함하는 증발기와; 상기 스테이지부를 통과하여 농염수가열기를 지나서 1번 스테이지안으로 연결되어 해수를 공급하는 해수공급배관과; 상기 농염수가열기안으로 유입되는 스팀이 응축되면서 고온화된 상기 해수공급배관을 통해 다시 스테이지부의 각 스테이지안으로 넘어가면서 증발이 일어나고, 이러한 증발과 함께 해수공급배관의 접촉에 의해 담수를 생성시키는 해수담수화장치에 있어서, An evaporator comprising a stage unit which is made of multiple stages and divided into a heat recovery section and a heat shield section; A seawater supply pipe passing through the stage and passing through the concentrated brine heater into the first stage to supply seawater; As the steam flowing into the concentrated brine condenser is condensed, the evaporation takes place through the seawater supply pipe, which is heated, back into each stage of the stage, and generates fresh water by contacting the seawater supply pipe with the evaporation. In 응축수회수배관을 통해 농염수가열기내에서 발생한 응축수를 발전설비로 재사용가능하도록 보내는 과정중, 상기 응축수회수배관과 연결되는 배관을 통해 응축수회수배관안의 응축수의 일부가 유입되도록 하는 스팀발생기와; A steam generator for introducing a portion of condensate in the condensate return pipe through a pipe connected to the condensate return pipe during a process of sending condensate generated in the brine heater to the power generation facility through a condensate return pipe for reuse; 상기 스팀발생기와 연결되어서 HRSG의 폐가스가 통과하여 대기중으로 배출되도록 하는 폐가스공급배관과; A waste gas supply pipe connected to the steam generator to allow waste gas of the HRSG to pass through and discharge into the atmosphere; 상기 폐가스공급배관에 의해 상기 스팀발생기내에서 응축수와 열교환이 이루어진 후 발생하는 스팀을 다시 농염수가열기안으로 재공급되도록 연결된 스팀공급배관과; A steam supply pipe connected to supply the steam generated after the heat exchange with the condensed water in the steam generator by the waste gas supply pipe again into the concentrated brine heater; 상기 농염수가열기안의 응축수를 발전설비로 보내기위해 설치된 상기 응축수회수배관안에, 상기 스팀발생기안에서 생성된 응축수가 유입되어 재회수되도록 상기 응축수회수배관과 연결된 응축수재회수배관으로 구성된 것을 특징으로 하는 해수담수화장치.Seawater desalination, characterized in that the condensate recovery pipe connected to the condensate recovery pipe connected to the condensate recovery pipe in the condensate recovery pipe installed to send the condensate in the concentrated brine heat generator to the power generation facility is introduced Device. 청구항 1에 있어서, The method according to claim 1, 상기 스팀발생기안에서 생성된 응축수를 응축수재회수배관을 통해 재회수도록 응축수재회수배관상에 응축수회수펌프가 구비된 것을 특징으로 하는 해수담수화장치. Seawater desalination apparatus, characterized in that the condensate water recovery pump is provided on the condensate water recovery pipe to recover the condensate generated in the steam generator through the condensate water recovery pipe. 다단으로 이루어지면서 열회복구간과 열차단구간으로 나뉘는 스테이지부를 포함하는 증발기와; 상기 스테이지부를 통과하여 농염수가열기를 지나서 1번 스테이지안으로 연결되어 해수를 공급하는 해수공급배관과; 상기 농염수가열기안으로 유입되는 스팀이 응축되면서 고온화된 해수공급배관을 통해 다시 스테이지부의 각 스테이지안으로 넘어가면서 증발이 일어나고, 이러한 증발과 함께 해수공급배관의 접촉에 의해 담수를 생성시키는 해수담수화장치에 있어서, An evaporator comprising a stage unit which is made of multiple stages and divided into a heat recovery section and a heat shield section; A seawater supply pipe passing through the stage and passing through the concentrated brine heater into the first stage to supply seawater; In the seawater desalination apparatus that the evaporation occurs as the steam flowing into the concentrated salt water condenser is condensed into the stage through the high temperature seawater supply pipe, and the fresh water is generated by contacting the seawater supply pipe with the evaporation. , 응축수회수배관을 통해 농염수가열기내에서 발생한 응축수를 발전설비로 재사용가능하도록 보내는 과정중, 상기 응축수회수배관과 연결되는 배관을 통해 응축수회수배관안의 응축수의 일부가 유입되도록 하는 증발기와; An evaporator for allowing a portion of the condensate in the condensate return pipe to flow through a conduit connected to the condensate return pipe during a process of sending condensate generated in the brine heater to the power generation facility through the condensate return pipe for reuse; 상기 증발기내의 응축수가 배출되어서 HRSG내에서 폐가스와 열교환하도록 하여 다시 증발기안으로 고온의 상태로 유입되어 증발되면서 스팀이 형성되도록 연결된 응축수재순환배관과; A condensate recirculation pipe connected to discharge the condensed water in the evaporator to exchange heat with the waste gas in the HRSG and to be introduced into a high temperature into the evaporator to evaporate and to form steam; 상기 증발기안에서 발생된 스팀이 농염수가열기안으로 재공급되도록 연결된 스팀공급배관으로 구성된 것을 특징으로 하는 해수담수화장치. The seawater desalination device, characterized in that consisting of a steam supply pipe connected to the steam generated in the evaporator is re-supplied into the concentrated brine heater. 청구항 3에 있어서, The method according to claim 3, 상기 HRSG쪽으로 응축수가 공급되도록 하는 응축수재순환배관상에 응축수재순환펌프가 구비된 것을 특징으로 하는 해수담수화장치. Seawater desalination device characterized in that the condensate recirculation pump is provided on the condensate recirculation pipe to be supplied to the HRSG.
KR1020060105031A 2006-10-27 2006-10-27 Freshwater apparatus of seawater KR100745963B1 (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109432808A (en) * 2018-12-26 2019-03-08 郑州博大浓缩干燥设备有限公司 Energy-saving and environment-friendly DDGS waste heat vapo(u)rization system
CN111422935A (en) * 2020-03-30 2020-07-17 天津国投津能发电有限公司 Condensed water negative pressure recovery system of low-temperature multi-effect seawater desalination device

Citations (1)

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Publication number Priority date Publication date Assignee Title
JPS55127187A (en) 1979-03-22 1980-10-01 Ishikawajima Harima Heavy Ind Co Ltd Heat transporting system connecting steam extracter and distilling apparatus of atomic installation

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55127187A (en) 1979-03-22 1980-10-01 Ishikawajima Harima Heavy Ind Co Ltd Heat transporting system connecting steam extracter and distilling apparatus of atomic installation

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109432808A (en) * 2018-12-26 2019-03-08 郑州博大浓缩干燥设备有限公司 Energy-saving and environment-friendly DDGS waste heat vapo(u)rization system
CN109432808B (en) * 2018-12-26 2024-05-28 郑州博大浓缩干燥设备有限公司 Energy-saving and environment-friendly DDGS waste heat evaporation system
CN111422935A (en) * 2020-03-30 2020-07-17 天津国投津能发电有限公司 Condensed water negative pressure recovery system of low-temperature multi-effect seawater desalination device

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