JP5105796B2 - Multi-stage flash water generator - Google Patents

Multi-stage flash water generator Download PDF

Info

Publication number
JP5105796B2
JP5105796B2 JP2006231419A JP2006231419A JP5105796B2 JP 5105796 B2 JP5105796 B2 JP 5105796B2 JP 2006231419 A JP2006231419 A JP 2006231419A JP 2006231419 A JP2006231419 A JP 2006231419A JP 5105796 B2 JP5105796 B2 JP 5105796B2
Authority
JP
Japan
Prior art keywords
evaporator
salt water
seawater
evaporation chamber
fresh water
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
JP2006231419A
Other languages
Japanese (ja)
Other versions
JP2008055244A (en
Inventor
明 清水
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi Zosen Corp
Original Assignee
Hitachi Zosen Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hitachi Zosen Corp filed Critical Hitachi Zosen Corp
Priority to JP2006231419A priority Critical patent/JP5105796B2/en
Priority to PCT/JP2007/060328 priority patent/WO2008026354A1/en
Publication of JP2008055244A publication Critical patent/JP2008055244A/en
Application granted granted Critical
Publication of JP5105796B2 publication Critical patent/JP5105796B2/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D1/00—Evaporating
    • B01D1/26—Multiple-effect evaporating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D5/00—Condensation of vapours; Recovering volatile solvents by condensation
    • B01D5/0033—Other features
    • B01D5/0036—Multiple-effect condensation; Fractional condensation
    • 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
    • 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
    • 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
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Organic Chemistry (AREA)
  • Heat Treatment Of Water, Waste Water Or Sewage (AREA)
  • Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)

Description

本発明は、多段フラッシュ式造水装置に関するものである。   The present invention relates to a multistage flash type fresh water generator.

海水から清水を得る装置として、多段フラッシュ式造水装置がある。
この造水装置は、図２に示すように、塩水（ブライン）の加熱部（ブラインヒータ）５１と、この加熱部５１で加熱された高温の塩水を導きフラッシュ蒸発させるとともに上記加熱部５１に供給する冷却用の低温の塩水により凝縮させて清水を得るようにした熱回収部５２と、この熱回収部５２からの塩水をさらに導きフラッシュ蒸発させるとともに冷却用の海水により凝縮させて清水を得るようになし且つ当該凝縮熱を奪った海水を外部（系外）に排出するようにした熱放出部５３とを有し、さらにこの熱放出部５３の出口における塩水を上記熱回収部５２の冷却用の塩水として供給するとともに、この熱放出部５３における塩水の一部を最終段から系外に取り出し廃棄していた（特許文献１参照）。
特開昭５９−１８９９８５号公報 As a device for obtaining fresh water from seawater, there is a multistage flash type fresh water generator.
As shown in FIG. 2, the fresh water generator introduces a heating unit (brine heater) 51 for salt water (brine) and high-temperature salt water heated by the heating unit 51 to flash-evaporate and supply to the heating unit 51. The heat recovery unit 52 that is condensed with low-temperature salt water for cooling to obtain fresh water, and the salt water from the heat recovery unit 52 is further led to flash evaporation and condensed with sea water for cooling to obtain fresh water. And a heat release portion 53 that discharges the seawater deprived of the condensation heat to the outside (outside of the system), and further, salt water at the outlet of the heat release portion 53 is used for cooling the heat recovery portion 52. And a part of the salt water in the heat release part 53 was taken out of the system from the final stage and discarded (see Patent Document 1).
JP 59-189985 A

上述したように、熱放出部の最終段から廃棄塩水（ブローダウンともいう）を外部（系外）に取り出し廃棄しているが、これは、熱放出部において、廃棄塩水を伝熱管内を流れる海水で冷却することになり、しかもこの冷却用の海水の大部分および廃棄塩水も外部に廃棄されるため熱的にみて無駄が生じており、具体的には、余分な伝熱負荷が生じていた。   As described above, waste salt water (also referred to as blowdown) is taken out (discarded) from the final stage of the heat release unit and discarded. This is because the waste salt water flows through the heat transfer tube in the heat release unit. It will be cooled with seawater, and most of this cooling seawater and waste saltwater are also discarded to the outside, so there is a waste of heat and, specifically, there is an extra heat transfer load. It was.

そこで、本発明は、熱放出部での伝熱負荷を減少し得る多段フラッシュ式造水装置を提供することを目的とする。   Then, an object of this invention is to provide the multistage flash type fresh water generator which can reduce the heat-transfer load in a heat-release part.

上記課題を解決するため、本発明の多段フラッシュ式造水装置は、塩水の加熱部と、この加熱部で加熱された塩水を導きフラッシュ蒸発させるとともに上記加熱部に供給される塩水により凝縮させて清水を得るようにした熱回収部と、この熱回収部からの塩水をさらに導きフラッシュ蒸発させるとともに冷却用の海水により凝縮させて清水を得るようになし且つ当該凝縮熱を奪った冷却用の海水を系外に排出するようにした熱放出部とを有し、さらに上記熱放出部内の塩水を上記熱回収部に冷却用の塩水として供給するようにした多段フラッシュ式造水装置において、
上記加熱部から熱回収部の最終段または熱放出部の最終段より前段側に導かれた塩水の一部を系外に排出するように構成したものである。 In order to solve the above-mentioned problems, a multistage flash type fresh water generator of the present invention is configured to cause a salt water heating unit and salt water heated by the heating unit to be led to flash evaporation and to be condensed by the salt water supplied to the heating unit. A heat recovery unit for obtaining fresh water, and a salt water from the heat recovery unit for further directing and evaporating the flash water and condensing with cooling sea water to obtain fresh water and taking away the heat of condensation. In a multistage flash type fresh water generator that has a heat discharge part that discharges the water to the outside of the system, and further supplies salt water in the heat discharge part to the heat recovery part as cooling salt water.
A part of the salt water led from the heating unit to the last stage of the heat recovery unit or the last stage of the heat release unit is discharged out of the system.

また、本発明の他の多段フラッシュ式造水装置は、塩水を加熱する加熱器と、この加熱器にて加熱された塩水を導きフラッシュ蒸発を行うとともに伝熱管内を流れる塩水により凝縮させて清水を得る蒸発室が複数段でもって設けられた第１蒸発器と、この第１蒸発器からの塩水をさらに導きフラッシュ蒸発を行うとともに伝熱管内を流れる冷却用の海水により凝縮させて清水を得る蒸発室が複数段でもって設けられた第２蒸発器と、上記第２蒸発器の最終段蒸発室内の伝熱管に冷却用の海水を供給する海水供給管路および当該第２蒸発器の最終段蒸発室から清水を取り出す清水取出管路と、上記第２蒸発器の初段蒸発室内の伝熱管から冷却用の海水を系外に排出する海水排出管路および当該海水排出管路内の海水の一部をこの第２蒸発器の最終段蒸発室内に戻し補給するための海水補給管路と、上記第２蒸発器内の塩水を第１蒸発器の最終段蒸発室内の伝熱管に冷却用の塩水として供給する塩水循環供給管路とを有する多段フラッシュ式造水装置であって、
上記第１蒸発器の最終段蒸発室内の塩水の一部を系外に排出する廃棄塩水排出管路を具備したものである。 In addition, another multi-stage flash type fresh water generator of the present invention comprises a heater for heating salt water, the salt water heated by this heater is guided to perform flash evaporation, and is condensed by the salt water flowing in the heat transfer tube. A first evaporator provided with a plurality of stages of evaporating chambers, and salt water from the first evaporator is further guided to perform flash evaporation, and condensed with cooling seawater flowing in the heat transfer tube to obtain fresh water A second evaporator provided with a plurality of stages of evaporation chambers, a seawater supply pipe for supplying seawater for cooling to the heat transfer tubes in the final stage evaporation chamber of the second evaporator, and a final stage of the second evaporator A fresh water extraction pipe for taking fresh water from the evaporation chamber, a sea water discharge pipe for discharging cooling seawater from the heat transfer pipe in the first stage evaporation chamber of the second evaporator, and one of the sea water in the sea water discharge pipe Part of the second evaporator A seawater replenishment line for replenishing back to the stage evaporation chamber, a salt water circulation supply line for supplying the salt water in the second evaporator to the heat transfer pipe in the final stage evaporation chamber of the first evaporator as cooling salt water, A multi-stage flash type water freshener having
A waste salt water discharge pipe for discharging a part of the salt water in the final stage evaporation chamber of the first evaporator to the outside of the system is provided.

さらに、本発明の他の多段フラッシュ式造水装置は、塩水を加熱する加熱器と、この加熱器にて加熱された塩水を導きフラッシュ蒸発を行うとともに伝熱管内を流れる塩水により凝縮させて清水を得る蒸発室が複数段でもって設けられた第１蒸発器と、この第１蒸発器からの塩水をさらに導きフラッシュ蒸発を行うとともに伝熱管内を流れる冷却用の海水により凝縮させて清水を得る蒸発室が複数段でもって設けられた第２蒸発器と、上記第２蒸発器の最終段蒸発室内の伝熱管に冷却用の海水を供給する海水供給管路および当該第２蒸発器の最終段蒸発室から清水を取り出す清水取出管路と、上記第２蒸発器の初段蒸発室内の伝熱管から冷却用の海水を系外に排出する海水排出管路および当該海水排出管路内の海水の一部をこの第２蒸発器の最終段蒸発室内に戻し補給するための海水補給管路と、上記第２蒸発器内の塩水を第１蒸発器の最終段蒸発室内の伝熱管に冷却用の塩水として供給する塩水循環供給管路とを有する多段フラッシュ式造水装置であって、
上記第２蒸発器の最終段よりも前側の前段側蒸発室内の塩水の一部を系外に排出する廃棄塩水排出管路を具備したものである。 Furthermore, another multi-stage flash type fresh water generator of the present invention comprises a heater for heating salt water, and the salt water heated by this heater is guided to perform flash evaporation and is condensed by the salt water flowing in the heat transfer tube. A first evaporator provided with a plurality of stages of evaporating chambers, and salt water from the first evaporator is further guided to perform flash evaporation, and condensed with cooling seawater flowing in the heat transfer tube to obtain fresh water A second evaporator provided with a plurality of stages of evaporation chambers, a seawater supply pipe for supplying seawater for cooling to the heat transfer tubes in the final stage evaporation chamber of the second evaporator, and a final stage of the second evaporator A fresh water extraction pipe for taking fresh water from the evaporation chamber, a sea water discharge pipe for discharging cooling seawater from the heat transfer pipe in the first stage evaporation chamber of the second evaporator, and one of the sea water in the sea water discharge pipe Part of this second evaporator A seawater replenishment line for replenishing back to the final stage evaporation chamber, and a salt water circulation supply line for supplying salt water in the second evaporator to the heat transfer pipe in the final stage evaporation chamber of the first evaporator as cooling salt water A multi-stage flash type fresh water generator having
A waste salt water discharge pipe for discharging a part of the salt water in the front stage evaporation chamber before the final stage of the second evaporator to the outside of the system is provided.

上記の構成によると、塩水の一部を熱放出部である第２蒸発器に移送するとともに、残りを熱回収部である第１蒸発器の最終段または第２蒸発器の前段側から系外に排出するようにしているので、従来のように、全てを熱放出部に移送させて所定温度まで低下させてから系外に排出するようにした場合に比べて、熱放出部における伝熱面積が少なくて済み、言い換えれば、伝熱負荷が減少し、したがってチタンなどの高価な材料で構成された伝熱管の使用量を減らすことができるので、設備の製造コストの低減化を図ることができる。   According to said structure, while transferring a part of salt water to the 2nd evaporator which is a heat | fever discharge | release part, the remainder is outside the system from the last stage of the 1st evaporator which is a heat recovery part, or the front | former stage side of a 2nd evaporator. Compared to the case where everything is transferred to the heat release part and lowered to a predetermined temperature and then discharged outside the system as in the conventional case, the heat transfer area in the heat release part is reduced. In other words, the heat transfer load is reduced, and therefore the amount of heat transfer tubes made of an expensive material such as titanium can be reduced, so that the manufacturing cost of the equipment can be reduced. .

また、熱放出部に供給する冷却用の海水量を減らすことができるので、海水取水設備での動力の低減化を図り得るとともに、さらなる製造コストの低減化を図ることができる。   Moreover, since the amount of the seawater for cooling supplied to the heat release part can be reduced, the power in the seawater intake facility can be reduced, and the manufacturing cost can be further reduced.

［実施の形態］
以下、本発明の実施の形態に係る多段フラッシュ式造水装置を図１に基づき説明する。
この多段フラッシュ式造水装置は、塩水（ブラインともいう）を蒸気により加熱する加熱器（加熱部）１と、この加熱器１にて加熱された高温の塩水を導きフラッシュ蒸発を行うとともに伝熱管１２内を流れる冷却用の低温の塩水により凝縮させて清水を得る蒸発室１１が複数段（例えば、１６段）でもって形成された第１蒸発器（熱回収部）２と、この第１蒸発器２からの塩水をさらに導きフラッシュ蒸発を行うとともに伝熱管１７内を流れる冷却用の海水により凝縮させて清水（淡水）を得る蒸発室１６が複数段（例えば、３段）でもって形成された第２蒸発器（熱放出部）３と、これら各蒸発器２，３の各蒸発室１１，１６内の空気を吸引して所定圧力以下にするための真空装置４とが具備されている。また、各蒸発室１１，１６内には、凝縮した清水を集める受け皿１３，１８がそれぞれ配置されている。なお、「海水」と「塩水」とを使い分けているが、「塩水」は、海水を加熱し水分を蒸発させて、その塩分濃度が濃くなったものを示している。 [Embodiment]
Hereinafter, a multi-stage flash type fresh water generator according to an embodiment of the present invention will be described with reference to FIG.
This multi-stage flash type fresh water generator is composed of a heater (heating unit) 1 for heating salt water (also referred to as brine) with steam, a high-temperature salt water heated by the heater 1 for flash evaporation, and a heat transfer tube. A first evaporator (heat recovery section) 2 in which an evaporation chamber 11 is formed by a plurality of stages (for example, 16 stages) to obtain fresh water by condensing with cooling low-temperature salt water flowing in the interior; The evaporation chamber 16 is formed in a plurality of stages (for example, three stages) to obtain fresh water (fresh water) by further guiding the salt water from the vessel 2 and performing flash evaporation and condensing with cooling seawater flowing in the heat transfer tube 17. A second evaporator (heat release part) 3 and a vacuum device 4 for sucking the air in each of the evaporation chambers 11 and 16 of each of the evaporators 2 and 3 to a predetermined pressure or less are provided. In each of the evaporation chambers 11 and 16, receiving trays 13 and 18 for collecting condensed fresh water are arranged, respectively. “Sea water” and “salt water” are used separately, but “salt water” indicates that the seawater is heated to evaporate the water and the salt concentration becomes high.

この造水装置の配管系統として、上記第２蒸発器３の最終段蒸発室１６（１６Ｃ）の伝熱管１７に冷却用の海水を供給する海水供給管（海水供給管路）２１および当該第２蒸発器３の最終段蒸発室１６Ｃの受け皿１８から清水を取り出す清水取出管（清水取出管路）２２と、上記第２蒸発器３の初段蒸発室（前段蒸発室ともいう）１６（１６Ａ）内の伝熱管１７から冷却用の海水を外部（系外）に排出する海水排出管（海水排出管路）２３および当該海水排出管２３内の冷却用の海水の一部をこの第２蒸発器３の最終段蒸発室１６Ｃ内に戻し海水を補給するための海水補給管（海水補給管路）２４と、上記第２蒸発器３内の（より具体的には最終段蒸発室１６Ｃ内の）塩水を第１蒸発器２の最終段蒸発室１１（１１Ｐ）内の伝熱管１２に冷却用の低温の塩水（循環ブラインともいう）として循環供給する塩水循環供給管（塩水循環供給管路）２５と、上記第１蒸発器２の初段蒸発室１１（１１Ａ）内の伝熱管１２からの冷却用の低温の塩水を加熱器１に移送する低温塩水移送管２６と、上記加熱器１にて加熱された高温の塩水を第１蒸発器２の初段蒸発室１１Ａに移送する高温塩水移送管２７と、上記第１蒸発器２の最終段蒸発室１１Ｐ内の塩水を外部（系外）に排出（廃棄）する廃棄塩水排出管（廃棄塩水排出管路）２８とが具備されている。なお、第２蒸発器３の３段の蒸発室１６のうち、中央の蒸発室を中段蒸発室１６（１６Ｂ）といい、また最終段より前側の蒸発室、すなわち初段蒸発室１６Ａと中段蒸発室１６Ｂとを纏めて前段側蒸発室という。   As a piping system of this fresh water generator, a seawater supply pipe (seawater supply pipe) 21 for supplying cooling seawater to the heat transfer pipe 17 of the final stage evaporation chamber 16 (16C) of the second evaporator 3 and the second Inside the fresh water take-out pipe (fresh water take-out pipe) 22 for taking out fresh water from the tray 18 of the final stage evaporation chamber 16C of the evaporator 3, and the first stage evaporation chamber (also referred to as the previous stage evaporation chamber) 16 (16A) of the second evaporator 3 A seawater discharge pipe (seawater discharge pipe) 23 for discharging cooling seawater from the heat transfer pipe 17 to the outside (outside of the system) and a part of the cooling seawater in the seawater discharge pipe 23 are transferred to the second evaporator 3. Seawater supply pipe (seawater supply pipe) 24 for returning seawater to the final stage evaporation chamber 16C and salt water in the second evaporator 3 (more specifically, in the final stage evaporation chamber 16C). Is cooled to the heat transfer tube 12 in the final stage evaporation chamber 11 (11P) of the first evaporator 2 Cooling from a salt water circulation supply pipe (salt water circulation supply pipe) 25 that circulates as low-temperature salt water (also referred to as a circulation brine), and a heat transfer pipe 12 in the first stage evaporation chamber 11 (11A) of the first evaporator 2 Low temperature salt water transfer pipe 26 for transferring low temperature salt water for heating to the heater 1 and high temperature salt water transfer pipe 27 for transferring high temperature salt water heated by the heater 1 to the first stage evaporation chamber 11A of the first evaporator 2. And a waste salt water discharge pipe (waste salt water discharge pipe) 28 for discharging (discarding) the salt water in the final stage evaporation chamber 11P of the first evaporator 2 to the outside (outside the system). Of the three-stage evaporation chambers 16 of the second evaporator 3, the central evaporation chamber is referred to as the middle-stage evaporation chamber 16 (16B), and the evaporation chamber on the front side of the final stage, that is, the first-stage evaporation chamber 16A and the middle-stage evaporation chamber. 16B is collectively referred to as a pre-stage side evaporation chamber.

また、上記各蒸発器２，３における蒸発室１１，１１；１６，１６同士の上部は蒸気連通部（図示しないが、例えば連通管）を介してそれぞれ連通されるとともに、蒸発室１１，１１；１６，１６同士の下部は例えばオリフィスを有する塩水連通部１１ａ，１６ａを介してそれぞれ連通されており、さらに各受け皿１３，１８の清水は、第１蒸発器２の初段蒸発室１１Ａの受け皿１３から第２蒸発器３の最終段蒸発室１６Ｃの受け皿１８まで順次移動して、清水取出管２２から取り出せるようにそれぞれ配管でもって接続されている。   The upper portions of the evaporation chambers 11, 11; 16, 16 in the evaporators 2, 3 are communicated with each other via a vapor communication portion (not shown, for example, a communication pipe), and the evaporation chambers 11, 11; The lower portions of 16 and 16 are communicated with each other through, for example, salt water communication portions 11a and 16a having orifices, and fresh water in each of the trays 13 and 18 flows from the tray 13 of the first stage evaporation chamber 11A of the first evaporator 2. The second evaporator 3 is sequentially connected to the tray 18 in the final stage evaporation chamber 16 </ b> C and connected by piping so that it can be taken out from the fresh water take-out pipe 22.

さらに、第１蒸発器２と第２蒸発器３とは、実際には一体に構成されており、したがって第１蒸発器２の最終段蒸発室１１Ｐ内と第２蒸発器３の初段蒸発室１６Ａ内とは各蒸発室同士における蒸気連通部と同様に蒸気連通部Ｐ１にて互いに連通されるとともに、各蒸発室同士における塩水連通部１１ａ，１６ａと同様に塩水連通部Ｐ２にて互いに連通されている。   Furthermore, the first evaporator 2 and the second evaporator 3 are actually configured integrally, and accordingly, the inside of the final stage evaporation chamber 11P of the first evaporator 2 and the first stage evaporation chamber 16A of the second evaporator 3 are integrated. The inside communicates with each other through the steam communication portion P1 in the same manner as the steam communication portion between the respective evaporation chambers, and communicates with each other through the salt water communication portion P2 as with the salt water communication portions 11a and 16a between the respective evaporation chambers. Yes.

なお、加熱器１には加熱用の蒸気を供給する蒸気供給管３１が接続されるとともに、当該加熱器１で発生したドレンを取り出すドレン排出管３２が接続されている。
また、上記各管には、必要に応じて、海水、塩水、清水、ドレンなどを移送するためのポンプ４１が設けられている。 The heater 1 is connected to a steam supply pipe 31 that supplies steam for heating, and is connected to a drain discharge pipe 32 that extracts the drain generated in the heater 1.
Each pipe is provided with a pump 41 for transferring seawater, salt water, fresh water, drain, and the like as necessary.

さらに、上記真空装置４は、蒸発室１１，１６内に流入した空気および補給用海水に溶存している空気を抜き取るとともに各蒸発室１１，１６内を所定の真空度に保持するためのもので、具体的には、蒸気駆動式のエジェクタが用いられている。なお、エジェクタにより取り出された空気および蒸気は、凝縮器４２にて、凝縮用海水供給管４３より供給される冷却用の海水により冷却される。   Further, the vacuum device 4 is for extracting the air flowing into the evaporation chambers 11 and 16 and the air dissolved in the supplementary seawater, and maintaining the evaporation chambers 11 and 16 at a predetermined degree of vacuum. Specifically, a steam-driven ejector is used. The air and steam taken out by the ejector are cooled by the cooling seawater supplied from the condensing seawater supply pipe 43 by the condenser 42.

上記構成において、加熱器１に蒸気が供給されるとともに、真空装置４により、各蒸発室１１，１６内が所定圧力に維持されている状態において、海水供給管２１より第２蒸発器３に供給された冷却用の海水（例えば、３５℃程度）は、各蒸発室１６内の伝熱管１７を順次通過した後、その一部は、海水補給管２４を介して第２蒸発器３内に戻され、そしてこの第２蒸発器３内の塩水（循環ブライン）は塩水循環供給管２５を介して、第１蒸発器２の各蒸発室１１内の伝熱管１２を順次通過して加熱器１内に移送され、ここで蒸気により所定温度（例えば、１０５℃程度）に加熱される。   In the above configuration, steam is supplied to the heater 1 and supplied to the second evaporator 3 from the seawater supply pipe 21 in a state where the evaporation chambers 11 and 16 are maintained at a predetermined pressure by the vacuum device 4. The seawater for cooling (for example, about 35 ° C.) sequentially passes through the heat transfer pipes 17 in the respective evaporation chambers 16, and a part thereof returns to the second evaporator 3 through the seawater supply pipe 24. The salt water (circulation brine) in the second evaporator 3 is sequentially passed through the heat transfer pipes 12 in the respective evaporation chambers 11 of the first evaporator 2 via the salt water circulation supply pipe 25 and then in the heater 1. Here, it is heated to a predetermined temperature (for example, about 105 ° C.) by steam.

この加熱された高温の塩水は、第１蒸発器２の初段蒸発室１１Ａ内に移送されて減圧下で蒸発（所謂、フラッシュ蒸発）が行われ、この蒸発した蒸気は伝熱管１２内を流れる冷却用の低温の塩水により冷却されて凝縮し清水となり、受け皿１３上に落下する。   The heated high-temperature salt water is transferred into the first stage evaporation chamber 11A of the first evaporator 2 and evaporated under reduced pressure (so-called flash evaporation). The evaporated steam is cooled in the heat transfer tube 12. It is cooled and condensed by low-temperature salt water for use to become fresh water, and falls on the tray 13.

また、塩水連通部１１ａを介して次段の蒸発室１１内に入った塩水も、同様に、フラッシュ蒸発するとともに伝熱管１２にて凝縮されて清水となり、受け皿１３上に落下する。
このように、加熱器１からの高温の塩水は、順次、第１蒸発器２の初段蒸発室１１Ａから最終段蒸発室１１Ｐに移動される。 Similarly, the salt water that has entered the evaporation chamber 11 of the next stage via the salt water communication portion 11 a is flash-evaporated and condensed in the heat transfer tube 12 to become fresh water, and falls on the tray 13.
Thus, the high-temperature salt water from the heater 1 is sequentially moved from the first stage evaporation chamber 11A of the first evaporator 2 to the last stage evaporation chamber 11P.

また、第２蒸発器３においても、第１蒸発器２と同様に、初段蒸発室１６Ａから最終段蒸発室１６Ｃに移動するとともに、それぞれの蒸発室１６にて伝熱管１７内を流れる冷却用の海水により凝縮されて清水が得られ、それぞれ受け皿１８上に落下する。これら両蒸発器２，３にて得られた清水は、最終的には、清水取出管２２より取り出される。   In the second evaporator 3, as in the first evaporator 2, the second evaporator 3 moves from the first stage evaporation chamber 16 </ b> A to the last stage evaporation chamber 16 </ b> C, and is used for cooling that flows in the heat transfer tubes 17 in the respective evaporation chambers 16. It is condensed by seawater to obtain fresh water, which falls on the tray 18 respectively. The fresh water obtained by both the evaporators 2 and 3 is finally taken out from the fresh water take-out pipe 22.

ところで、加熱器１から第１蒸発器２内の底部に供給された高温の塩水は、順次、初段蒸発室１１Ａから最終段蒸発室１１Ｐに移動した後、塩水連通部Ｐ２を介して、第２蒸発器３内に移送されるが、その一部が、第１蒸発器２の最終段蒸発室１１Ｐから廃棄塩水排出管２８を介して系外（外部）に排出される。 By the way, the high-temperature salt water supplied from the heater 1 to the bottom of the first evaporator 2 sequentially moves from the first stage evaporation chamber 11A to the last stage evaporation chamber 11P, and then passes through the salt water communication section P2 to the second. Although being transferred into the evaporator 3, a part thereof is discharged out of the system (outside) from the final stage evaporation chamber 11 </ b> P of the first evaporator 2 through the waste salt water discharge pipe 28.

なお、第２蒸発器３内に移送された塩水は、塩水循環供給管２５を介して、第１蒸発器２の最終段蒸発室１１Ｐ内の伝熱管１２に冷却用の塩水として供給される。
このように、加熱器１から第１蒸発器２に移送（供給）された塩水の一部を第１蒸発器２の最終段蒸発室１１Ｐから外部に排出するようにしたので、例えば第２蒸発器３に移送して当該第２蒸発器３の最終段蒸発室１６Ｃから外部に排出するようにした場合に比べて、当該第２蒸発器３での冷却熱量（伝熱負荷）が少なくて済む。 The salt water transferred into the second evaporator 3 is supplied as cooling salt water to the heat transfer pipe 12 in the final stage evaporation chamber 11P of the first evaporator 2 via the salt water circulation supply pipe 25.
In this way, a part of the salt water transferred (supplied) from the heater 1 to the first evaporator 2 is discharged to the outside from the final stage evaporation chamber 11P of the first evaporator 2, so that, for example, the second evaporation The amount of cooling heat (heat transfer load) in the second evaporator 3 can be reduced as compared with the case where it is transferred to the evaporator 3 and discharged from the final stage evaporation chamber 16C of the second evaporator 3 to the outside. .

詳しく説明すれば、第２蒸発器３から第１蒸発器２の伝熱管１２に移送する塩水の温度が高い場合、当該第１蒸発器２での凝縮効率、すなわち清水の生成効率が悪くなるため、第２蒸発器３における塩水の温度を、ある程度（例えば、４３℃）まで下げておく必要がある。したがって、第１蒸発器２から第２蒸発器３に移送される塩水の量が減った分だけフラッシュ蒸発量が減り、第２蒸発器３での伝熱面積を少なくすることができる。   More specifically, when the temperature of the salt water transferred from the second evaporator 3 to the heat transfer tube 12 of the first evaporator 2 is high, the condensation efficiency in the first evaporator 2, that is, the generation efficiency of fresh water is deteriorated. The salt water temperature in the second evaporator 3 needs to be lowered to a certain level (for example, 43 ° C.). Accordingly, the flash evaporation amount is reduced by the amount of salt water transferred from the first evaporator 2 to the second evaporator 3, and the heat transfer area in the second evaporator 3 can be reduced.

すなわち、第２蒸発器３に配置されるとともに高価なチタンなどの材料で構成された伝熱管１７の使用量を減らすことができ、その分、設備の製造コストの低減化に繋がる。
さらに、第２蒸発器３に供給する冷却用の海水量を減らすことができるので、海水取水設備での動力の低減化を図り得るとともに、海水取水設備でのさらなる製造コストの低減化を図ることができる。 That is, it is possible to reduce the amount of heat transfer tubes 17 that are arranged in the second evaporator 3 and are made of an expensive material such as titanium, which leads to a reduction in equipment manufacturing costs.
Furthermore, since the amount of seawater for cooling supplied to the second evaporator 3 can be reduced, the power in the seawater intake facility can be reduced, and the manufacturing cost in the seawater intake facility can be further reduced. Can do.

ここで、本発明に係る装置と従来例に相当する装置について、各部分での伝熱面積、並びに海水、塩水、清水の温度および流量を比較した結果を、下記の［表１］に示しておく。   Here, with respect to the apparatus according to the present invention and the apparatus corresponding to the conventional example, the results of comparing the heat transfer area in each part and the temperature and flow rate of seawater, salt water and fresh water are shown in [Table 1] below. deep.

Figure 0005105796
なお、［表１］中の管路位置の欄に、各流体が流れる管路部材の番号（配管の部材番号）を記載しておく。
Figure 0005105796
 In addition, the number of the pipe member through which each fluid flows (the member number of the pipe) is described in the column of the pipe position in [Table 1].

この［表１］から分かるように、熱放出部である第２蒸発器３での伝熱面積が従来例の装置に比べて、１５％程度減少しているとともに、海水供給管２１より供給される海水量についても１５％程度減少しているのがよく分かる。なお、清水については、その減少量が１．６％程度と僅かであり、殆ど問題はない。   As can be seen from this [Table 1], the heat transfer area in the second evaporator 3 which is a heat release part is reduced by about 15% compared to the conventional apparatus, and is supplied from the seawater supply pipe 21. It can be clearly seen that the amount of seawater is about 15%. In addition, about the fresh water, the reduction amount is as small as about 1.6%, and there is almost no problem.

ところで、上記実施の形態において、第１蒸発器２の最終段蒸発室１１Ｐから塩水の一部を系外に排出するように説明したが、第２蒸発器３の最終段蒸発室１６Ｃ以外の前段側、すなわち初段蒸発室１６Ａまたは中段蒸発室１６Ｂから塩水の一部を系外に排出するようにしてもよい。この場合も、第２蒸発器３における伝熱負荷の軽減を図ることができる（但し、伝熱負荷の軽減の割合は、実施の形態の場合よりも少し低下する）。   In the above embodiment, a part of the salt water is discharged from the final stage evaporation chamber 11P of the first evaporator 2 to the outside of the system, but the upstream stage other than the final stage evaporation chamber 16C of the second evaporator 3 is described. A part of the salt water may be discharged from the side, that is, from the first stage evaporation chamber 16A or the middle stage evaporation chamber 16B. Also in this case, the heat transfer load in the second evaporator 3 can be reduced (however, the rate of reduction of the heat transfer load is slightly lower than in the embodiment).

本発明の実施の形態に係る多段フラッシュ式造水装置の概略管路系統を示す図である。It is a figure which shows the general | schematic pipeline system of the multistage flash | flush type fresh water generator concerning embodiment of this invention. 従来例に係る多段フラッシュ式造水装置の概略管路系統を示す図である。It is a figure which shows the general | schematic pipeline system of the multistage flush type fresh water generator concerning a prior art example.

符号の説明Explanation of symbols

１ 加熱器
２ 第１蒸発器
３ 第２蒸発器
４ 真空装置
１１ 蒸発室
１２ 伝熱管
１３ 受け皿
１６ 蒸発室
１７ 伝熱管
１８ 受け皿
２１ 海水供給管
２２ 清水取出管
２３ 海水排出管
２４ 海水補給管
２５ 塩水循環供給管
２８ 廃棄塩水排出管 DESCRIPTION OF SYMBOLS 1 Heater 2 1st evaporator 3 2nd evaporator 4 Vacuum apparatus 11 Evaporation chamber 12 Heat transfer tube 13 Sauce pan 16 Evaporation chamber 17 Heat transfer tube 18 Sauce plate 21 Seawater supply tube 22 Fresh water discharge tube 23 Seawater discharge tube 24 Seawater supply tube 25 Salt water Circulation supply pipe 28 Waste salt water discharge pipe

Claims (3)

塩水の加熱部と、この加熱部で加熱された塩水を導きフラッシュ蒸発させるとともに上記加熱部に供給される塩水により凝縮させて清水を得るようにした熱回収部と、この熱回収部からの塩水をさらに導きフラッシュ蒸発させるとともに冷却用の海水により凝縮させて清水を得るようになし且つ当該凝縮熱を奪った冷却用の海水を系外に排出するようにした熱放出部とを有し、さらに上記熱放出部内の塩水を上記熱回収部に冷却用の塩水として供給するようにした多段フラッシュ式造水装置において、
上記加熱部から熱回収部の最終段または熱放出部の最終段より前段側に導かれた塩水の一部を系外に排出するように構成したことを特徴とする多段フラッシュ式造水装置。 A salt water heating unit, a heat recovery unit that directs and evaporates the salt water heated by the heating unit and condenses the salt water supplied to the heating unit to obtain fresh water, and salt water from the heat recovery unit And a heat release part configured to further evaporate the flash and condense it with the seawater for cooling to obtain fresh water and to discharge the seawater for cooling deprived of the heat of condensation to the outside of the system, and In the multi-stage flash type fresh water generator configured to supply the salt water in the heat release part as cooling water to the heat recovery part,
A multi-stage flash type fresh water generator characterized in that a part of the salt water led from the heating section to the last stage of the heat recovery section or the last stage of the heat release section is discharged out of the system. 塩水を加熱する加熱器と、
この加熱器にて加熱された塩水を導きフラッシュ蒸発を行うとともに伝熱管内を流れる塩水により凝縮させて清水を得る蒸発室が複数段でもって設けられた第１蒸発器と、
この第１蒸発器からの塩水をさらに導きフラッシュ蒸発を行うとともに伝熱管内を流れる冷却用の海水により凝縮させて清水を得る蒸発室が複数段でもって設けられた第２蒸発器と、
上記第２蒸発器の最終段蒸発室内の伝熱管に冷却用の海水を供給する海水供給管路および当該第２蒸発器の最終段蒸発室から清水を取り出す清水取出管路と、
上記第２蒸発器の初段蒸発室内の伝熱管から冷却用の海水を系外に排出する海水排出管路および当該海水排出管路内の海水の一部をこの第２蒸発器の最終段蒸発室内に戻し補給するための海水補給管路と、
上記第２蒸発器内の塩水を第１蒸発器の最終段蒸発室内の伝熱管に冷却用の塩水として供給する塩水循環供給管路とを有する多段フラッシュ式造水装置であって、
上記第１蒸発器の最終段蒸発室内の塩水の一部を系外に排出する廃棄塩水排出管路を具備したことを特徴とする多段フラッシュ式造水装置。 A heater for heating salt water;
A first evaporator provided with a plurality of stages of evaporation chambers that guide the salt water heated by this heater to perform flash evaporation and condense with salt water flowing in the heat transfer tube to obtain fresh water;
A second evaporator provided with a plurality of evaporating chambers for obtaining fresh water by further guiding the salt water from the first evaporator to perform flash evaporation and condensing with cooling seawater flowing in the heat transfer pipe;
A seawater supply line for supplying seawater for cooling to the heat transfer pipe in the final stage evaporation chamber of the second evaporator, and a fresh water extraction line for extracting fresh water from the final stage evaporation chamber of the second evaporator;
A seawater discharge pipe for discharging cooling seawater from the heat transfer pipe in the first stage evaporation chamber of the second evaporator to the outside of the system, and a part of the seawater in the seawater discharge pipe for the final stage evaporation chamber of the second evaporator Seawater replenishment pipeline to replenish
A multi-stage flash type fresh water generator having a salt water circulation supply pipe for supplying the salt water in the second evaporator to the heat transfer pipe in the final stage evaporation chamber of the first evaporator as salt water for cooling,
A multi-stage flash type fresh water generator comprising a waste salt water discharge pipe for discharging a part of salt water in the final stage evaporation chamber of the first evaporator to the outside of the system. 塩水を加熱する加熱器と、
この加熱器にて加熱された塩水を導きフラッシュ蒸発を行うとともに伝熱管内を流れる塩水により凝縮させて清水を得る蒸発室が複数段でもって設けられた第１蒸発器と、
この第１蒸発器からの塩水をさらに導きフラッシュ蒸発を行うとともに伝熱管内を流れる冷却用の海水により凝縮させて清水を得る蒸発室が複数段でもって設けられた第２蒸発器と、
上記第２蒸発器の最終段蒸発室内の伝熱管に冷却用の海水を供給する海水供給管路および当該第２蒸発器の最終段蒸発室から清水を取り出す清水取出管路と、
上記第２蒸発器の初段蒸発室内の伝熱管から冷却用の海水を系外に排出する海水排出管路および当該海水排出管路内の海水の一部をこの第２蒸発器の最終段蒸発室内に戻し補給するための海水補給管路と、
上記第２蒸発器内の塩水を第１蒸発器の最終段蒸発室内の伝熱管に冷却用の塩水として供給する塩水循環供給管路とを有する多段フラッシュ式造水装置であって、
上記第２蒸発器の最終段よりも前側の前段側蒸発室内の塩水の一部を系外に排出する廃棄塩水排出管路を具備したことを特徴とする多段フラッシュ式造水装置。
A heater for heating salt water;
A first evaporator provided with a plurality of stages of evaporation chambers that guide the salt water heated by this heater to perform flash evaporation and condense with salt water flowing in the heat transfer tube to obtain fresh water;
A second evaporator provided with a plurality of evaporating chambers for obtaining fresh water by further guiding the salt water from the first evaporator to perform flash evaporation and condensing with cooling seawater flowing in the heat transfer pipe;
A seawater supply line for supplying seawater for cooling to the heat transfer pipe in the final stage evaporation chamber of the second evaporator, and a fresh water extraction line for extracting fresh water from the final stage evaporation chamber of the second evaporator;
A seawater discharge pipe for discharging cooling seawater from the heat transfer pipe in the first stage evaporation chamber of the second evaporator to the outside of the system, and a part of the seawater in the seawater discharge pipe for the final stage evaporation chamber of the second evaporator Seawater replenishment pipeline to replenish
A multi-stage flash type fresh water generator having a salt water circulation supply pipe for supplying the salt water in the second evaporator to the heat transfer pipe in the final stage evaporation chamber of the first evaporator as salt water for cooling,
A multi-stage flash type fresh water generator comprising a waste salt water discharge pipe for discharging a part of salt water in a front stage evaporation chamber before the final stage of the second evaporator to the outside of the system.
JP2006231419A 2006-08-29 2006-08-29 Multi-stage flash water generator Expired - Fee Related JP5105796B2 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP2006231419A JP5105796B2 (en) 2006-08-29 2006-08-29 Multi-stage flash water generator
PCT/JP2007/060328 WO2008026354A1 (en) 2006-08-29 2007-05-21 Multistage flush type desalination plant

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2006231419A JP5105796B2 (en) 2006-08-29 2006-08-29 Multi-stage flash water generator

Publications (2)

Publication Number Publication Date
JP2008055244A JP2008055244A (en) 2008-03-13
JP5105796B2 true JP5105796B2 (en) 2012-12-26

Family

ID=39135641

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2006231419A Expired - Fee Related JP5105796B2 (en) 2006-08-29 2006-08-29 Multi-stage flash water generator

Country Status (2)

Country Link
JP (1) JP5105796B2 (en)
WO (1) WO2008026354A1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5388192B2 (en) * 2009-05-28 2014-01-15 独立行政法人物質・材料研究機構 Conductive polymer actuator material
CN104402159B (en) * 2014-11-28 2016-01-27 浙江大学 A kind of board-like multistage flash evaporation desulfurization wastewater disposal and recovery devices and methods therefor

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5814267B2 (en) * 1975-09-22 1983-03-18 バブコツク日立株式会社 tadangflatsushizousuisouchi
JPS5656286A (en) * 1979-10-15 1981-05-18 Sasakura Eng Co Ltd Purification of seawater
JPH09117753A (en) * 1995-10-24 1997-05-06 Babcock Hitachi Kk Seawater desalination device by multistage flash evaporation and its operation

Also Published As

Publication number Publication date
WO2008026354A1 (en) 2008-03-06
JP2008055244A (en) 2008-03-13

Similar Documents

Publication Publication Date Title
KR100783686B1 (en) Process and plant for multi-stage flash desalination of water
JP6456407B2 (en) Evaporator
JP5804931B2 (en) Multi-effect evaporation method and multi-effect evaporation apparatus
KR102308392B1 (en) Distillation apparatus including distillation column
JP5105796B2 (en) Multi-stage flash water generator
CN113398609A (en) Steam circulation heat supply evaporation equipment
ES2844941T3 (en) Seawater desalination apparatus for desalinating seawater
KR101587123B1 (en) Freshwater Apparatus of Seawater of MED and VMD Hybrid Type using Ejector
JP5226710B2 (en) Equipment for recovering volatile substances in high viscosity polymerization solutions
JPWO2009075300A1 (en) Condenser
KR100749223B1 (en) Multi-stage flash evaporator
JP5430304B2 (en) Multi-stage flash water generator
JP2013228188A (en) Superheated steam generator
KR101567655B1 (en) TVC-MED having Non-condensible Gas Venting System
RU2342322C2 (en) Method of leaching for bauxite pulp, facility (versions) and heat-exchanger for its inmplementation
JPWO2006095397A1 (en) Multi-stage flash seawater desalination system
JP3879407B2 (en) Fresh water generator
JP2006255503A (en) Heating/cooling apparatus
JP4827816B2 (en) Concentration apparatus and concentration method
KR100937447B1 (en) An long tube evaporator for a multiple stage flashing facility
CN216062019U (en) Steam circulation heat supply evaporation equipment
JP2005334747A (en) Steam recompression type concentration equipment
JP2007051801A (en) Heat exchanger
JP2010036129A (en) Distillation device
CN114949895A (en) Distillation apparatus with distillation column

Legal Events

Date Code Title Description
RD04 Notification of resignation of power of attorney

Free format text: JAPANESE INTERMEDIATE CODE: A7424

Effective date: 20080430

A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20090409

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20120515

A521 Written amendment

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20120717

TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20120904

A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20121002

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20151012

Year of fee payment: 3

LAPS Cancellation because of no payment of annual fees