FR2284352A1 - Natural circulation continuous evaporator - heated partly by injecting open steam to siphon below the separator - Google Patents

Natural circulation continuous evaporator - heated partly by injecting open steam to siphon below the separator

Info

Publication number
FR2284352A1
FR2284352A1 FR7526880A FR7526880A FR2284352A1 FR 2284352 A1 FR2284352 A1 FR 2284352A1 FR 7526880 A FR7526880 A FR 7526880A FR 7526880 A FR7526880 A FR 7526880A FR 2284352 A1 FR2284352 A1 FR 2284352A1
Authority
FR
France
Prior art keywords
open steam
liquid
natural circulation
separator
heating
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
FR7526880A
Other languages
French (fr)
Other versions
FR2284352B1 (en
Inventor
Konrad Mattern
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.)
GEA Group AG
Original Assignee
Metallgesellschaft AG
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 Metallgesellschaft AG filed Critical Metallgesellschaft AG
Publication of FR2284352A1 publication Critical patent/FR2284352A1/en
Application granted granted Critical
Publication of FR2284352B1 publication Critical patent/FR2284352B1/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
    • B01D1/26—Multiple-effect evaporating
    • 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
    • B01D1/00—Evaporating
    • B01D1/14—Evaporating with heated gases or vapours or liquids in contact with the liquid

Landscapes

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

Abstract

Natural circulation continuous evaporation is done with improved heat transfer. The liquid is brought to boiling point before it enters the heating tubes by injecting open steam. This operation is performed at a higher hydrostatic pressure than at the tube inlet. Especially in vacuum evaporators for heat sensitive materials. Usually the heating of the liquid occurs in the lower part of the tubes where the liquid is moving slowly and heat transfer coefficients are correspondingly low. Boiling is inhibited by the hydrostatic pressure of the liquid in the tube. The method cited here performs most of the heating with open steam so that the tube heater can be much smaller than usual or can work at much higher capacity.
FR7526880A 1974-09-11 1975-09-02 Natural circulation continuous evaporator - heated partly by injecting open steam to siphon below the separator Granted FR2284352A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19742443393 DE2443393A1 (en) 1974-09-11 1974-09-11 PROCESS FOR IMPROVING HEAT EXCHANGE IN NATURAL CIRCUIT AND CONTINUOUS EVAPORATORS

Publications (2)

Publication Number Publication Date
FR2284352A1 true FR2284352A1 (en) 1976-04-09
FR2284352B1 FR2284352B1 (en) 1979-05-25

Family

ID=5925393

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7526880A Granted FR2284352A1 (en) 1974-09-11 1975-09-02 Natural circulation continuous evaporator - heated partly by injecting open steam to siphon below the separator

Country Status (5)

Country Link
JP (1) JPS5152982A (en)
DE (1) DE2443393A1 (en)
ES (1) ES440839A1 (en)
FR (1) FR2284352A1 (en)
NL (1) NL7509637A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0106463A3 (en) * 1982-09-16 1986-12-30 Imperial Chemical Industries Plc Heat exchangers

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
NEANT *

Also Published As

Publication number Publication date
ES440839A1 (en) 1977-03-01
DE2443393A1 (en) 1976-03-25
FR2284352B1 (en) 1979-05-25
NL7509637A (en) 1976-03-15
JPS5152982A (en) 1976-05-11

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Legal Events

Date Code Title Description
TP Transmission of property
ST Notification of lapse