WO1981003655A1 - Appareil de dessalement de saumure - Google Patents

Appareil de dessalement de saumure Download PDF

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Publication number
WO1981003655A1
WO1981003655A1 PCT/JP1981/000133 JP8100133W WO8103655A1 WO 1981003655 A1 WO1981003655 A1 WO 1981003655A1 JP 8100133 W JP8100133 W JP 8100133W WO 8103655 A1 WO8103655 A1 WO 8103655A1
Authority
WO
WIPO (PCT)
Prior art keywords
condensing
section
tank
evaporating
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.)
Ceased
Application number
PCT/JP1981/000133
Other languages
English (en)
Japanese (ja)
Inventor
H Kusakawa
J Kai
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric 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
Priority claimed from JP7950380A external-priority patent/JPS574282A/ja
Priority claimed from JP55138018A external-priority patent/JPS5763189A/ja
Application filed by Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Publication of WO1981003655A1 publication Critical patent/WO1981003655A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/02—Treatment of water, waste water, or sewage by heating
    • C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
    • C02F1/10—Treatment of water, waste water, or sewage by heating by distillation or evaporation by direct contact with a particulate solid or with a fluid, as a heat transfer medium
    • 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

Definitions

  • the present invention desalinates and desalinates brine such as seawater.
  • brackish water When desalination of brackish water evaporates or freezes
  • Latent heat comes and goes, and at the time of evaporation, a latent heat of evaporation of 540 ca per water is required at the time of evaporation.
  • Multi-stage flash is one of the methods to obtain fresh water from brackish water.
  • the purpose is to provide a thermal
  • this invention provides a heating system for heating brackish water
  • the first pipe which leads the condensate tank together with the carrier gas
  • a second pipe is provided to guide the carrier gas to the evaporation tank.
  • the condensing tank and the evaporating tank are
  • Latent heat rejects points such as poor recovery and poor or poor thermal efficiency. That is,
  • a carrier gas with a very high absolute humidity is obtained.
  • This carrier gas is heated in the condensation tank.
  • the condensing tank and the evaporating tank connected to each other are obtained in the evaporating tank together with, for example, overflowing the brine in the condensing tank into the evaporating tank.
  • a single connection pipe is used to transfer the carrier gas having a saturated vapor pressure to the condensing tube provided in the condensing tank, which will be described later. It may be connected at the upper part of this, but it has the connection pipe for the irrigation channel for overflowing the irrigation water in the condensing tank into the evaporating tank and the saturated water vapor pressure obtained in the evaporating tank.
  • each of the condensing tank and evaporating tank Connected at the upper part of each of the condensing tank and evaporating tank using two connecting pipes for the conveying gas passage for transferring the carrier gas to the condensing pipe provided in the condensing tank This is preferred because the carrier gas does not entrain the brine spray.
  • the condensing tank In the brine desalination apparatus of the present invention, the condensing tank
  • the amount of heat lost by such things is replenished.
  • the heat source used as a means for heating the brackish water is installed in the upper part of the condensing tank, the upper part of the evaporating tank, or the upper part of the evaporating tank, for example.
  • a connecting pipe (connecting pipe) connecting the condensing tank and the evaporating tank may be provided, a connecting pipe (connecting pipe) connecting the condensing tank and the evaporating tank
  • connection pipe for the irrigation passage the first pipe
  • a steam pump using a blower pump is used as means for transporting the carrier gas having a saturated water vapor pressure obtained in the evaporating tank to the condensing tank.
  • a method is employed in which a carrier gas having a saturated water vapor pressure obtained in the degassing tank is transferred from the upper part of the evaporating tank to a condensing tube provided in the condensing tank described later.
  • the carrier gas that has been conveyed into the condensation tube and has released water vapor passes through a carrier gas circulation pipe described later.
  • the blower pump used as a means for transporting the carrier gas includes a connection for connecting a condensing tank and an evaporating tank.
  • connection pipe for gas passage second pipe
  • One O PI WIPO Carrier gas is conveyed from the upper part of the evaporating tank to the condensing tube and conveyed to the condensing pipe provided in the condensing tank, and is circulated and conveyed to the lower part of the evaporating tank through the gas circulation pipe.
  • the blower pump may be provided in the carrier gas circulation pipe so that the carrier gas is circulated and transported in the above-described direction.
  • a condensing pipe is provided in the condensing tank to condense the carrier gas having a saturated water vapor pressure and conveyed from the evaporating tank.
  • a method of cooling by passing through the pipe is adopted, whereby the water vapor in the carrier gas is condensed on the inner wall of the condensation pipe due to a decrease in temperature, and fresh water is obtained.
  • the sensible heat and latent heat of the steam are given to the brine in the condensing tank, and the temperature of the water transferred to the evaporating tank is raised.
  • connecting a large number of condensing tanks and evaporating tanks is extremely advantageous because heat loss radiated from the brine desalination unit to the outside of the system is reduced.
  • a condensing tank to be used for example, a condensing tube to which a heat sink or the like for facilitating heat exchange is attached is provided in the condensing tank.
  • the evacuation tank is used.
  • the carrier air In the brine desalination apparatus of the present invention, the carrier air
  • a condensate tank is provided in the condensing tank to circulate and transport the body.
  • the lower part of the condensed tube and the lower part of the evaporator tank are the carrier gas circulation pipe
  • the body is moved from the upper part of the evaporator tank to the condensing tank by an air blow pump.
  • Connection pipe (two connection pipes are provided.)
  • connection pipe for the carrier gas passage the connection pipe for the carrier gas passage
  • the carrier gas that has released water vapor is located in the lower part of the condenser tube.
  • the carrier air In the brine desalination apparatus of the present invention, the carrier air
  • the heat collecting area of the vessel can be small, which is very useful in industry.
  • the present invention generates heat in the condensing city by transferring heat generated in the condensing part to the evaporating part using a heat exchanger in order to increase thermal efficiency. It is possible to increase the heat recovery rate and improve the heat utilization efficiency, and to reduce the size of the equipment itself and to increase the desalination rate of irrigation power.
  • the present invention further provides a condensing section separated by a partition wall. It consists of an evaporator city, an evaporator city to which the irrigation water is supplied, an irrigation water heater, an irrigation water discharge pipe, a freshwater outlet in the condenser section, and a steamer section and condenser section. And are connected by a circulation pipe for circulating the carrier gas, and further through the partition wall. Heat from the condensing section to the evaporating section
  • the desalination apparatus of the present invention steams the heat generated in the condensing city.
  • a new kind of product Completed based on knowledge, which has higher desalination than conventional desalination equipment.
  • Fig. 1 shows one embodiment of the desalination plant of the present invention.
  • Fig. 2 shows a block diagram of the present invention.
  • FIG. 2 is a schematic explanatory view showing one embodiment of a water desalination apparatus.
  • FIG. 3 shows an embodiment of another desalination apparatus of the present invention.
  • FIG. 4 is a schematic cross-sectional explanatory view showing the desalination apparatus of the present invention.
  • FIG. 8 is a schematic 'cross-sectional explanatory view showing another embodiment of the device.
  • FIG. 1 shows one embodiment of the brine desalination plant of the present invention.
  • (1) is a condensing tank, (is an evaporating tank, ( 3 ) is a condensing tank) and a watering passage connecting the evaporating tank ( 2 ) ⁇
  • Connection pipe, (4) is the carrier air connecting the condensation tank (1) and the evaporation tank (2).
  • Body passage ⁇ connection pipe ( 5 ) is a ventilation pump, ( 6 ) is a water supply
  • the main pipe, W is the brine supply pipe to the condensation tank (1), and (8) is
  • the main pipe for water discharge ( 9 ) is the freshwater discharge pipe for the condensing tank (1), d is the conveying gas circulation pipe, 0 ⁇ is the main pipe for discharging the aqua water,
  • the brine is pumped by the brine supply pump (P).
  • the water is supplied to the main brine supply pipe ( 6 ),
  • the solar collector (A) is heated by a heat pipe ( ⁇ ) and enters the evaporating tank ( 2 ). It is heated and in the evaporating tank ( 2 ).
  • the water entering the tank is transported from the lower part of the condensing pipe through the carrier gas circulation pipe ⁇ to the evaporating tank., While descending through the evaporating tank while giving water vapor to the carrier gas. ) Is discharged from the main water discharge pipe through the water discharge pipe.
  • the carrier gas is conveyed by a blower pump), passes through the carrier gas circulation pipe ⁇ ) from the lower part of the condenser tube provided in the condenser tank (1), and evaporates.
  • the temperature is raised by the vapor-liquid equilibrium while becoming a carrier gas having a saturated steam pressure, and the condensate tank is passed through the connection pipe ( 4 ) for the carrier gas passage.
  • the carrier gas having a saturated water vapor pressure which is conveyed into the condensation tube provided in (1), is conveyed into the condensation tube, while being conveyed downward in the condensation tube.
  • the sensible heat and latent heat are applied to the brine in the condensation tank (1) on the wall of the condenser tube, and In other words, it releases the amount of water vapor according to the temperature difference.
  • Carrier gas that has released water vapor is transport-gas circulation pipe
  • ⁇ 'WIPO And sends it to the evaporation tank that is paired with the condensation tank.
  • a predetermined amount of carrier gas (using air as gas) is sent to the evaporating tank and sent to the condensing tank that is paired with the evaporating tank.
  • the seawater is heated while cooling the carrier air (having a saturated steam pressure at the temperature set at the upper part of the evaporator tank; A).
  • a steady state is reached when the entire system (all condensing and evaporating vessels) has reached a certain temperature.
  • 10-3 is the sum of the amount of water vapor (6) and the amount of air (4.3), and 21.4 is the average molecular weight of air having a saturated water vapor pressure at 90 ° C (29 X ( 234/760) + 18X (526/760))]
  • FIG. 2 is a schematic explanatory view showing an embodiment of the desalination apparatus of the present invention.
  • -In Fig. 2 is a condensing tank
  • ( 2 ) is an evaporating tank
  • ( 3 ) is a connection pipe for irrigation passage connecting the condensing tank (1) and evaporating tank ( 2 )
  • ( 4 ) is a condensing tank.
  • a connecting pipe for the carrier gas path connecting the tank (1) and the evaporating tank),) is a ventilation pump
  • ( 7 ) is a brine supply pipe to the condensing tank (1), and is fresh water in the condensing tank (1).
  • An outlet pipe, ⁇ ) is a carrier gas circulation pipe
  • ⁇ is a pipe for drainage of the evaporating tank ( 2 )
  • ⁇ is a condenser pipe (1).
  • the blower pump is connected to the connection pipe ( 4 ) for the carrier gas passage and the condenser pipe ⁇ , and the carrier gas is transported from the upper part of the evaporation tank (1) into the condenser pipe ⁇ . (In other words, conveyed from the lower part of the condensing pipe ⁇ through the carrier gas circulation pipe ⁇ to the lower part of the evaporator tank ( 2 )).
  • seawater enters the condensing tank (1) from the brackish water supply pipe ( 7 ) at a temperature of 25 ° C, and is transported in the condensing pipe ⁇ from the upper city to the lower city.
  • the temperature rises while exchanging heat with the carrier gas having the saturated steam pressure, and moves to the upper part of the condensing tank (1).
  • the seawater at the top of the condensing tube ⁇ The temperature is assumed to be 85 ° C].
  • the seawater that has migrated to the top of the condensing pipe ⁇ is a heat pipe installed in the connection pipe ( 3 ) for the brine passage.
  • the temperature of the solar collector (A) (high heat source) shown in Fig. 1 is 95. C) and sent to the evaporating tank with the same structure as the packed tower or the distillation tower from the connection pipe for brine passage ( 3 ). Rare.
  • the seawater that has entered the evaporating tank (2) then gives water vapor to the carrier air, which is conveyed from the lower part of the evaporating tank) to the upper city by the blower pump, by the principle of a wet wall.
  • the temperature of the carrier air is being raised, the temperature is gradually lowered and the air is transferred to the lower part of the evaporating tank.
  • Seawater temperature of 30 ° C
  • the temperature K of the seawater is 30 because the carrier air has water vapor at the saturated vapor pressure at 30 ° C. Lower than C; never.
  • the seawater that has dropped to 30 ° C is discharged from the brine discharge pipe ⁇ . If more than the specified amount of transport air is sent to the evaporating tank ( 2 ), the heating of the air will deprive the heat energy and result in heat loss.
  • the transport air is circulated as follows. That is, the carrier air having a saturated water vapor pressure at 30 3 enters the evaporation tank ( 2 ) from the lower part of the evaporation tank through the carrier gas circulation pipe, and is heated. While maintaining the vapor-liquid equilibrium relationship with the seawater descending from the top, the temperature is raised and the water is transferred to the upper part of the evaporator tank. As a result, the carrier air has a pressure of about 9 ° C. at the top of the evaporating tank, and has a saturated steam pressure at that temperature.
  • the carrier air having a saturated steam pressure at 90 ° C When the carrier air having a saturated steam pressure at 90 ° C is led to the condenser tube ⁇ by the blower pump), the uppermost part of the evaporator tank becomes negative pressure, and Evaporation is further promoted.
  • the carrier air having a saturated steam pressure gives sensible heat to the seawater while being conveyed from the upper part to the downtown area through the condenser tube W, and as the dew point decreases, the steam condenses on the wall of the condenser tube. Releases latent heat.
  • the condensed water drops move downward by gravity, and are collected in the freshwater sump [Freshwater sump (B) shown in Fig. 1] through the freshwater discharge pipe ( 9 ).
  • the carrier air that has exchanged heat with seawater is at 30 ° C.
  • Fig. 3 shows another embodiment of the desalination plant of the present invention.
  • FIG. 4 is a schematic sectional explanatory view of the desalination apparatus of the present invention.
  • FIG. 3 is a schematic sectional view showing another embodiment
  • the figure is suitable for producing several tons / day of fresh water.
  • Each shows a relatively large device.
  • (201) is the evaporator
  • (101) is the evaporator
  • the shrinking city is an auxiliary water heating city.
  • the main body of the device is formed in a cylindrical shape
  • Each of the bulkheads made of clean material (for example, corrosion-resistant aluminum plate) has a heat exchange fin.
  • Insulation prevents heat exchange with the outside city.
  • OMPI WIPO Raw water is removed by a filtration device (not shown) in advance. After that, water is sent to the water heating section ⁇ by the pumping port ⁇ . In the warm zone]), the heat released in the condensing section (101) adjacent to the partition wall ⁇ through the partition wall ⁇ and the heat exchange fin ( ⁇ ) attached to the partition wall ⁇ and the partition wall ⁇ are attached. ) To move into the brackish water heating section to raise the temperature of the brackish water. The heated water> is sent from the upper part of the heating part ⁇ ) to the canister heating unit, where it is heated to a predetermined temperature in the heating part ⁇ , and then the evaporation part (201) Will be sent to
  • the partition wall is provided on the apparatus main body.
  • the heat recovery rate is low because the movement is almost free.
  • the ratio of fresh water obtained :) can be obtained.
  • the desalination rate can be increased up to 40%
  • the brackish water heating city includes:
  • One O P1- raises the temperature of the heated brackish water to a temperature close to that required for evaporation, and supplements the heat lost from the device itself, such as by radiating heat.
  • the fins have the function of transferring the heat released in the condensing city (101) together with the partition walls to the evaporating section (201) and giving the latent heat of evaporation to the brine. Therefore, the vine is preferably formed so that its total surface area is large enough to improve heat recovery. To increase the total surface area of the fins, increase the surface area of the individual fins, as well as transfer a large number of fins ⁇ to the bulkhead ⁇ . Just use it. Thus, the irrigation water sprayed from the upper city of the evaporation city (201) in a uniform manner is used for partition walls and fins.
  • heat is transferred from the condensing section (101) to the evaporating section (201) and, if necessary, to the heating section.
  • the partition walls ⁇ and ⁇ are filled.
  • Figure 4 shows that a few tons of freshwater is produced per day.
  • a heat exchanger communicating through a wall will be adopted.
  • the heat exchangers ⁇ are stacked in multiple stages
  • brackish water As a heating medium.
  • the water receives the heat generated in the condensing section (101), and
  • the operation is repeated for each passage through each heat exchanger ⁇ , and the temperature is also increased by itself, and the brine is required for evaporation in the heating section ⁇ .
  • a water film is formed, and the fuel obtained in the condensation section (101) is formed.
  • the generated water vapor is converted into heat energy by the carrier gas.
  • the carrier gas moves downward, and the partition wall ⁇
  • the uppermost end of the evaporation city (201) is used.
  • the water flows through the heat exchanger (37a) at the top end.
  • a part of the brackish water heated in the bottom heat exchanger (37b) is sent to the evaporation city (201).

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  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • 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)
  • Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
  • Heat Treatment Of Water, Waste Water Or Sewage (AREA)

Abstract

Appareil de dessalement de saumure, dans lequel la saumure est vaporisee par la partie superieure d'un vaporisateur (2), et un gaz porteur de la vapeur d'eau se deplace vers le haut depuis sa partie inferieure, ce gaz porteur sature de vapeur d'eau etant introduit dans le condensateur (1) ou un echange de chaleur s'effectue pour condenser la vapeur d'eau, cette echange de chaleur s'effectuant entre le condensateur (1) et le vaporisateur (2) ou entre le condensateur (1) et l'eau salee pour augmenter le rendement thermique total.
PCT/JP1981/000133 1980-06-11 1981-06-05 Appareil de dessalement de saumure Ceased WO1981003655A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP80/79503 1980-06-11
JP7950380A JPS574282A (en) 1980-06-11 1980-06-11 Brine desalting device
JP55138018A JPS5763189A (en) 1980-10-01 1980-10-01 Brine desalting device

Publications (1)

Publication Number Publication Date
WO1981003655A1 true WO1981003655A1 (fr) 1981-12-24

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ID=26420522

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP1981/000133 Ceased WO1981003655A1 (fr) 1980-06-11 1981-06-05 Appareil de dessalement de saumure

Country Status (1)

Country Link
WO (1) WO1981003655A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2214835A (en) * 1988-02-06 1989-09-13 Gahin Dr Salah Method and apparatus for desalination

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3317406A (en) * 1963-05-01 1967-05-02 Kim D Beard Hot air desalinization apparatus
US3860492A (en) * 1973-06-27 1975-01-14 Jr Alvin Lowi Liquid separation system
JPS50112277A (fr) * 1973-11-09 1975-09-03

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3317406A (en) * 1963-05-01 1967-05-02 Kim D Beard Hot air desalinization apparatus
US3860492A (en) * 1973-06-27 1975-01-14 Jr Alvin Lowi Liquid separation system
JPS50112277A (fr) * 1973-11-09 1975-09-03

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2214835A (en) * 1988-02-06 1989-09-13 Gahin Dr Salah Method and apparatus for desalination

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