FR2238512A1 - Evaporative concentration of liquid e.g. sulphuric acid - with injection of inert gas for biphase heat transfer efficiency - Google Patents

Evaporative concentration of liquid e.g. sulphuric acid - with injection of inert gas for biphase heat transfer efficiency

Info

Publication number
FR2238512A1
FR2238512A1 FR7425087A FR7425087A FR2238512A1 FR 2238512 A1 FR2238512 A1 FR 2238512A1 FR 7425087 A FR7425087 A FR 7425087A FR 7425087 A FR7425087 A FR 7425087A FR 2238512 A1 FR2238512 A1 FR 2238512A1
Authority
FR
France
Prior art keywords
liquid
inert gas
heat transfer
evaporative concentration
injection
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.)
Granted
Application number
FR7425087A
Other languages
French (fr)
Other versions
FR2238512B3 (en
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.)
PPG Architectural Coatings Canada Inc
Original Assignee
Canadian Industries 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 Canadian Industries Ltd filed Critical Canadian Industries Ltd
Publication of FR2238512A1 publication Critical patent/FR2238512A1/en
Application granted granted Critical
Publication of FR2238512B3 publication Critical patent/FR2238512B3/fr
Granted legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D1/00—Evaporating
    • B01D1/06—Evaporators with vertical tubes
    • B01D1/12—Evaporators with vertical tubes and forced circulation
    • 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
    • B01D3/34—Distillation or related exchange processes in which liquids are contacted with gaseous media, e.g. stripping with one or more auxiliary substances
    • B01D3/343—Distillation or related exchange processes in which liquids are contacted with gaseous media, e.g. stripping with one or more auxiliary substances the substance being a gas
    • B01D3/346—Distillation or related exchange processes in which liquids are contacted with gaseous media, e.g. stripping with one or more auxiliary substances the substance being a gas the gas being used for removing vapours, e.g. transport gas

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)

Abstract

Continuous evaporation process in a natural or forced circulation evaporator is improved by introducing a small quantity of an inert gas, e.g. air, into the liquid boiling in the evaporator, the pressure at which gas is introduced being pref. 5-300 mm of Hg absolute. The gas expands greatly as it enters the liquid which is boiling at reduced pressure, and biphase boundary layers are formed on heat-transfer surfaces so that rate of heat flow is increased by >=50%, and the coefficient of heat transfer raised by >=70%. Process is particularly applicable to concentrating H2SO4 to >=85% and also suitable for evaporative concentration of sugar solutions salts, caustic soda, etc.
FR7425087A 1973-07-27 1974-07-18 Evaporative concentration of liquid e.g. sulphuric acid - with injection of inert gas for biphase heat transfer efficiency Granted FR2238512A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3583773 1973-07-27

Publications (2)

Publication Number Publication Date
FR2238512A1 true FR2238512A1 (en) 1975-02-21
FR2238512B3 FR2238512B3 (en) 1977-05-20

Family

ID=10382059

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7425087A Granted FR2238512A1 (en) 1973-07-27 1974-07-18 Evaporative concentration of liquid e.g. sulphuric acid - with injection of inert gas for biphase heat transfer efficiency

Country Status (12)

Country Link
JP (1) JPS5071570A (en)
AU (1) AU6992174A (en)
BE (1) BE818164A (en)
BR (1) BR7405743D0 (en)
DE (1) DE2431257A1 (en)
ES (1) ES428701A1 (en)
FR (1) FR2238512A1 (en)
IT (1) IT1016119B (en)
NL (1) NL7409648A (en)
NO (1) NO742408L (en)
SE (1) SE7409618L (en)
ZA (1) ZA743704B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2486627A1 (en) * 1980-07-14 1982-01-15 Cryoplants Ltd HEAT EXCHANGER AND METHOD FOR BOILING LIQUIFIED GAS

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA1128592A (en) * 1980-01-15 1982-07-27 Michio Ikura Method and apparatus for concentrating a liquid

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2486627A1 (en) * 1980-07-14 1982-01-15 Cryoplants Ltd HEAT EXCHANGER AND METHOD FOR BOILING LIQUIFIED GAS

Also Published As

Publication number Publication date
DE2431257A1 (en) 1975-02-06
IT1016119B (en) 1977-05-30
BR7405743D0 (en) 1975-05-20
SE7409618L (en) 1975-01-28
AU6992174A (en) 1975-12-11
NL7409648A (en) 1975-01-29
FR2238512B3 (en) 1977-05-20
BE818164A (en) 1974-11-18
ES428701A1 (en) 1976-11-16
NO742408L (en) 1975-02-24
ZA743704B (en) 1975-06-25
JPS5071570A (en) 1975-06-13

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Legal Events

Date Code Title Description
ST Notification of lapse