US3463706A - Water distillation apparatus with distillate quality sensing control - Google Patents

Water distillation apparatus with distillate quality sensing control Download PDF

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Publication number
US3463706A
US3463706A US668337A US3463706DA US3463706A US 3463706 A US3463706 A US 3463706A US 668337 A US668337 A US 668337A US 3463706D A US3463706D A US 3463706DA US 3463706 A US3463706 A US 3463706A
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US
United States
Prior art keywords
distillate
reservoir
conduit
quality
distillation apparatus
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 - Lifetime
Application number
US668337A
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English (en)
Inventor
Forrest Thompson Randell
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.)
Weir Group PLC
Original Assignee
G&J Weir Ltd
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 G&J Weir Ltd filed Critical G&J Weir Ltd
Application granted granted Critical
Publication of US3463706A publication Critical patent/US3463706A/en
Anticipated expiration legal-status Critical
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    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/02—Treatment of water, waste water, or sewage by heating
    • C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
    • C02F1/045—Treatment of water, waste water, or sewage by heating by distillation or evaporation for obtaining ultra-pure water
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D1/00—Evaporating
    • B01D1/0082—Regulation; Control
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D3/00—Distillation or related exchange processes in which liquids are contacted with gaseous media, e.g. stripping
    • B01D3/10—Vacuum distillation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D3/00—Distillation or related exchange processes in which liquids are contacted with gaseous media, e.g. stripping
    • B01D3/42—Regulation; Control
    • 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S203/00—Distillation: processes, separatory
    • Y10S203/19—Sidestream

Definitions

  • This invention relates to a method of and apparatus for controlling the discharge of distillate particularly fresh water from distillation apparatus comprising an evaporation section including heating means for the liquid to be distilled, a condensing section including vapour cooling means, a distillate reservoir in the condensing section, a reservoir in the evaporation section for liquid to be distilled, and pumping means for withdrawing the distillate from the distillate reservoir.
  • distillation apparatus is hereinafter referred to as distillation apparatus of the type aforesaid.
  • the distillate discharge pump operated continuously and, if the distillate was unsatisfactory, a dump valve in the pump outlet was actuated to direct the distillate to waste, this being wasteful and uneconomic.
  • a method of controlling the discharge of distillate from distillation apparatus of the type aforesaid comprising measuring the quality of distillate from the distillate reservoir and automatically controlling the operation of said pumping means to cause the discharge of distillate to stop if the quality of distillate is below that desired, and to star-t or restart when the quality of distillate is at or above that desired, the unsatisfactory ydistillate being fed back to the evaporation section for re-distillation.
  • apparatus for controlling the discharge of distillate from distillation apparatus of the type aforesaid comprising control means for controlling the operation of the pumping means, means for diverting the distillate discharge to the evaporation section reservoir, and distillate quality sensing means in communication with said control means, the arrangement being such that if the quality of distillate is below that desired the sensing means signals the control means to cause the discharge of distillate by the pumping means to stop and the distillate discharge to be diverted to the evaporation section reservoir, and if the quality of distillate is at or above that desired the sensing means signals the control means to cause the discharge of distillate by the pumping means to be started or restarted.
  • the quality sensing means is in a conduit connecting the distillate reservoir with the pumping means.
  • an overflow conduit is provided adjacent the distillate conduit to receive unsatisfactory distillate overflowing therefrom, the overow conduit being ice adapted to discharge its contents to the reservoir in the evaporation section.
  • the illustrated apparatus is for producing fresh water from salt water (brine) and includes a vertically disposed chamber having an evaporation section 1 situated at the base thereof and a condensing section 2 situated above the evaporation section. Filters 3 are provided at the inlet to the condensing section and in the path of upiiowing vapour from the evaporation section.
  • a casing 4 at the base of the evaporation section provides a reservoir for liquid to be distilled, and the raw feed water inlet conduit 5 connects into the reservoir 4.
  • a distillate overflow conduit 6 is provided connecting with the ⁇ conduit 5.
  • a bank of vertical riser tubes 7 enclosed in a casing 8 connects the reservoir 4 with the vapour space of the evaporation section 1 from which excess brine can be drained through conduit 9 under the influence of a jet pump 10.
  • Heating medium which is preferably steam or hot water, is passed into the casing 8 through an inlet 11, circulates around the tubes 7 to cause evaporation of the brine therein and passes out again through an outlet 12.
  • the condensing section includes a reservoir 20 for distillate, conduits 13 and 14 connecting this reservoir 20 ⁇ with pump 15.
  • the U-section 23 of conduit 6 will act as a gas seal between conduit 13 and reservoir 4.
  • conduit 6 will allow the unsatisfactory condensate from reservoir 20 to be fed back to reservoir 4 for redistillation in the evaporating section 1.
  • the condensing section has also a bank of U-tubes 16 extending horizontally int-o the condensing section and serving for the throughfiow of cooling waters.
  • the pump 15 is motor driven and is provided to draw off the distillate from the distillate reservoir 20 and direct same to a fresh water storage tank (not shown) a nonreturn valve 17 being provided in the outlet from the pump to prevent the sucking back of fresh water.
  • the pump motor 18 which could be for example, either an electrical motor or an internal combustion engine, has its operation controlled by an on-off switch.
  • a distillate quality sensing device includes a probe 19 situated within the distillate at the conjunction of conduits 13 and 6 such that it is contiguous with the distillate therein, and a salinometer 21 in communication with the on-off controller 22 for the motor 18.
  • the distillation apparatus operates as follows: brine is evaporated in the evaporation section 1 and the vapour produced driven off upwards through the filters 3 wherein impurities are removed; the purified vapour is passed into the condensing section 2, and the vapour is condensed, and distillate formed is precipitated into the distillate reservoir 20.
  • the motor controller 22 will have been set to start the motor and pump-in operation but, if the distillate is not of the required quality, then sensing device 19, 21 will signal the controller 22 to cause same to return to the stop position. Consequently, the pump 15 will remain immobile, and the distillate will not be discharged to the fresh water tank.
  • distillate produced continues to be of unsatisfactory quality, then there will continue to be a ow of same to the reservoir 4 for re-dstillation. This recirculation of the distillate will continue until the distillate in the conduit 13 reaches the required quality when the pump will be signalled to start and the distillate discharged to the fresh water tank.
  • Apparatus for controlling the discharge of distillate, particularly fresh water, from distillation apparatus of the type comprising an evaporation section including heating means for the liquid to be distilled, a condensing section including vapour cooling means, a distillate reservoir in the condensing section, a reservoir in the evaporation section for liquid to be distilled, pumping means connected to said distillate reservoir by discharge conduit to Withdraw distillate from the distillate reservoir, said apparatus including means for controlling the operation of the pumping means; a branch conduit leading olf from the discharge conduit connecting the pump to the distillate reservoir, said branch conduit communicating with the evaporation section reservoir; distillate quality sensing means in the discharge conduit and in communication with said control means; and distillate seal means in said branch conduit to prevent sucking back of fresh feed liquid during the operation of the pumping means; the arrangement being such that if the quality of distillate is below that desired the sensing means signals the control means to canse the discharge of distillate to stop, by stopping the pumping means and the distillate dis- References Cited

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  • 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)
  • Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
  • Heat Treatment Of Water, Waste Water Or Sewage (AREA)
US668337A 1966-12-07 1967-09-18 Water distillation apparatus with distillate quality sensing control Expired - Lifetime US3463706A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB54704/66A GB1139238A (en) 1966-12-07 1966-12-07 Water distillation plant

Publications (1)

Publication Number Publication Date
US3463706A true US3463706A (en) 1969-08-26

Family

ID=10471829

Family Applications (1)

Application Number Title Priority Date Filing Date
US668337A Expired - Lifetime US3463706A (en) 1966-12-07 1967-09-18 Water distillation apparatus with distillate quality sensing control

Country Status (11)

Country Link
US (1) US3463706A (de)
BE (1) BE704116A (de)
DE (1) DE1619752C3 (de)
DK (1) DK135443B (de)
ES (1) ES345579A1 (de)
GB (1) GB1139238A (de)
GR (1) GR34437B (de)
NL (1) NL144489B (de)
NO (1) NO124682B (de)
SE (1) SE328248B (de)
YU (1) YU31921B (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0254519A2 (de) * 1986-07-19 1988-01-27 Nitta Gelatin Inc. Verfahren zum Herstellen von hochreinem Wasser
US5028298A (en) * 1987-03-11 1991-07-02 Hitachi, Ltd. Waste water concentrator and waste water disposal plant

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2249968A (en) * 1990-11-23 1992-05-27 John Hilary Bryant Vacuum enhanced water extraction system

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2487884A (en) * 1945-12-12 1949-11-15 Little Inc A Vapor-compression distillation
GB743451A (en) * 1952-10-02 1956-01-18 Zeiss Stiftung Process and apparatus for double-distillation
US2960449A (en) * 1956-02-06 1960-11-15 American Mach & Foundry Apparatus for distilling sea water
US3074216A (en) * 1960-05-17 1963-01-22 Cleaver Brooks Special Product Steam generator
US3235469A (en) * 1962-05-22 1966-02-15 Marine Electric Corp Water purity metering systems
US3259552A (en) * 1961-11-28 1966-07-05 Aqua Chem Inc Flash evaporator with distillate deaerator
US3325376A (en) * 1963-05-08 1967-06-13 Us Stoneware Co Distillation column

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2487884A (en) * 1945-12-12 1949-11-15 Little Inc A Vapor-compression distillation
GB743451A (en) * 1952-10-02 1956-01-18 Zeiss Stiftung Process and apparatus for double-distillation
US2960449A (en) * 1956-02-06 1960-11-15 American Mach & Foundry Apparatus for distilling sea water
US3074216A (en) * 1960-05-17 1963-01-22 Cleaver Brooks Special Product Steam generator
US3259552A (en) * 1961-11-28 1966-07-05 Aqua Chem Inc Flash evaporator with distillate deaerator
US3235469A (en) * 1962-05-22 1966-02-15 Marine Electric Corp Water purity metering systems
US3325376A (en) * 1963-05-08 1967-06-13 Us Stoneware Co Distillation column

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0254519A2 (de) * 1986-07-19 1988-01-27 Nitta Gelatin Inc. Verfahren zum Herstellen von hochreinem Wasser
EP0254519A3 (de) * 1986-07-19 1988-05-25 Nitta Gelatin Inc. Verfahren zum Herstellen von hochreinem Wasser
US5028298A (en) * 1987-03-11 1991-07-02 Hitachi, Ltd. Waste water concentrator and waste water disposal plant

Also Published As

Publication number Publication date
DE1619752C3 (de) 1974-01-17
GR34437B (el) 1968-05-03
DE1619752B2 (de) 1973-05-30
DK135443B (da) 1977-05-02
ES345579A1 (es) 1968-11-16
YU234567A (en) 1973-08-31
BE704116A (de) 1968-02-01
NL144489B (nl) 1975-01-15
GB1139238A (en) 1969-01-08
SE328248B (de) 1970-09-07
NO124682B (de) 1972-05-23
DE1619752A1 (de) 1970-08-20
DK135443C (de) 1977-11-21
YU31921B (en) 1974-02-28
NL6714452A (de) 1968-06-10

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