GB1129171A - Improvements in the regulation of multiple-effect evaporators - Google Patents

Improvements in the regulation of multiple-effect evaporators

Info

Publication number
GB1129171A
GB1129171A GB43215/65A GB4321565A GB1129171A GB 1129171 A GB1129171 A GB 1129171A GB 43215/65 A GB43215/65 A GB 43215/65A GB 4321565 A GB4321565 A GB 4321565A GB 1129171 A GB1129171 A GB 1129171A
Authority
GB
United Kingdom
Prior art keywords
evaporator
vapour
valve
regulator
concentration
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
Application number
GB43215/65A
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.)
Fives Lille Cail
Original Assignee
Fives Lille Cail
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 FR991198A external-priority patent/FR1418945A/en
Priority claimed from FR984A external-priority patent/FR87141E/en
Application filed by Fives Lille Cail filed Critical Fives Lille Cail
Publication of GB1129171A publication Critical patent/GB1129171A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D1/00—Evaporating
    • B01D1/0082—Regulation; Control

Landscapes

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

Abstract

1,129,171. Multiple-effect evaporators. SOC. FIVES LILLE-CAIL. 12 Oct., 1965 [13 Oct., 1964; 6 Jan., 1965], No. 43215/65. Heading BIB. In an installation comprising a multipleeffect evaporator 1<SP>1</SP> . .. 4<SP>1</SP> associated with an auxiliary evaporator 6<SP>1</SP> and an evaporatorcrystalliser 5<SP>1</SP> which is heated by a portion of the vapours taken from one of the effects (e.g. effect 2<SP>1</SP> as shown), auxiliary evaporator 6<SP>1</SP> is supplied with vapour from crystalliser 5<SP>1</SP> and, if required, with vapour obtained by autoevaporation in vessel 25 of the condensate withdrawn from the heating-chambers of evaporators 1<SP>1</SP> . . . 4<SP>1</SP> into heat-storer 35, and the concentration of the solution withdrawn from evaporator 6<SP>1</SP> is regulated by a regulator 13<SP>1</SP> which controls the valves admitting the vapour to evaporator 6<SP>1</SP>. For example, a drop in concentration of the solution detected by regulator 13<SP>1</SP> results in the opening of valve 14<SP>1</SP>. If the corresponding increase in the flow of vapour coming from crystalliser 5<SP>1</SP> into evaporator 6<SP>1</SP> is inadequate to compensate for the drop in concentration, regulator 13<SP>1</SP> acts on valve 28 and thus permits some of the condensate contained in heat storer 35 to flow to, and evaporate in, vessel 25. The opening of valves 14<SP>1</SP> and 28 brings about an increase in the evaporation in evaporator 6<SP>1</SP>. When the concentration of the solution attains the desired set value, regulator 13<SP>1</SP> acts first on valve 28 so as to close it, and subsequently on valve 14<SP>1</SP> so as to reduce the inflow of vapour from crystalliser 5<SP>1</SP> into evaporator 6<SP>1</SP>. Regulator 8<SP>1</SP> controls valve 10<SP>1</SP> which admits live steam into evaporator 1<SP>1</SP> in accordance with the flow to this effect of the solution to be concentrated, which is regulated by valve 17<SP>1</SP>. Vapours may be discharged from effects 1<SP>1</SP>, 21 and 3<SP>1</SP> at 20<SP>1</SP>, 21<SP>1</SP> and 22<SP>1</SP>; but the flow of vapour from effect 41 should be nil. In an alternative embodiment, the solution may be fed in parallel to evaporators 1<SP>1</SP> and 6<SP>1</SP>, in which case the solutions discharged from evaporators 4<SP>1</SP> and 6<SP>1</SP> are mixed, and the concentration of the mixture regulates the supply of vapour from the crystalliser to evaporator 6<SP>1</SP>.
GB43215/65A 1964-10-13 1965-10-12 Improvements in the regulation of multiple-effect evaporators Expired GB1129171A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR991198A FR1418945A (en) 1964-10-13 1964-10-13 Improvements to the regulation of multiple effect evaporation plants
FR984A FR87141E (en) 1964-03-17 1965-03-12 Improvements to the regulation of multiple effect evaporation plants

Publications (1)

Publication Number Publication Date
GB1129171A true GB1129171A (en) 1968-10-02

Family

ID=26161465

Family Applications (1)

Application Number Title Priority Date Filing Date
GB43215/65A Expired GB1129171A (en) 1964-10-13 1965-10-12 Improvements in the regulation of multiple-effect evaporators

Country Status (7)

Country Link
BE (1) BE670062A (en)
CS (1) CS156402B2 (en)
DE (1) DE1519703A1 (en)
ES (1) ES317911A1 (en)
GB (1) GB1129171A (en)
SE (1) SE311880B (en)
YU (2) YU31329B (en)

Also Published As

Publication number Publication date
YU31330B (en) 1973-04-30
ES317911A1 (en) 1966-04-16
YU31329B (en) 1973-04-30
CS156402B2 (en) 1974-07-24
SE311880B (en) 1969-06-30
BE670062A (en) 1966-01-17
DE1519703A1 (en) 1970-03-12

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