WO1983001579A1 - Procede et dispositif d'evaporation - Google Patents

Procede et dispositif d'evaporation Download PDF

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Publication number
WO1983001579A1
WO1983001579A1 PCT/FI1982/000056 FI8200056W WO8301579A1 WO 1983001579 A1 WO1983001579 A1 WO 1983001579A1 FI 8200056 W FI8200056 W FI 8200056W WO 8301579 A1 WO8301579 A1 WO 8301579A1
Authority
WO
WIPO (PCT)
Prior art keywords
series
blower
steam
auxiliary blower
evaporator
Prior art date
Application number
PCT/FI1982/000056
Other languages
English (en)
Inventor
Oy Mkt-Tehtaat
Heimo Välimäki
Original Assignee
Mkt Tehtaat Oy
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 Mkt Tehtaat Oy filed Critical Mkt Tehtaat Oy
Priority to NL8220411A priority Critical patent/NL8220411A/nl
Priority to DE3249168T priority patent/DE3249168C2/de
Publication of WO1983001579A1 publication Critical patent/WO1983001579A1/fr
Priority to DK318283A priority patent/DK151182C/da

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
    • B01D1/28—Evaporating with vapour compression
    • B01D1/2803—Special features relating to the vapour to be compressed
    • B01D1/2812—The vapour is coming from different sources
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D1/00—Evaporating
    • B01D1/28—Evaporating with vapour compression
    • B01D1/2884—Multiple effect compression

Definitions

  • the present invention concerns an evaporation procedure wherein the evaporation is carried out using at least two successive evaporators connected in series with regard to the liquid that is being evaporated and wherein this liquid is heated with steam which is introduced in the evaporators from a duct system provided with at least two blowers or equivalent pieces of equipment increasing the pressure of the steam.
  • Such evaporating procedures are known in the art wherein the liquid to be evaporated is conducted through successive evaporator units so that the evaporating temperature and the solid mtter content of the liquid increase by steps. It is possible to use for heating steam the vapour that separates from the liquid that is being evaporated, the pressure and temperature of this vapour being increased with the aid of blowers, compressors or equivalent apparatus.
  • the object of the present invention is to provide an evaporating procedure in which the problems mentioned have been largely avoided.
  • the invention is characterized in that the heating steam blow ers are used in series connection so that one of them operates as main blower, part of the steam that has passed therethrough being conducted to the first evaporator in the series and another part, to a blower serving as auxiliary blower, from which the steam is conducted to the latter evaporator in the series.
  • the main blower may be substantially bigger than the auxiliary blower
  • This obviates the necsssity of mounting expensive regulating gear on the main blower, and it will also cause no extra energy consumption in the process.
  • the mounting of regulating means on this unit is less epxensive, and since also the amount of energy consumed by the auxiliary blower is less, it will not considerably increase the total energy consumption in the process, even at poorer efficieny, if such were the case.
  • the small-sized auxiliary blower can also be regulated rather closely so that the desired solid matter concentration is exactly attained in the ultimate inspissated product.
  • the invention further concerns an apparatus for carrying out the procedure just described.
  • This apparatus comprises in a way in itself known in the art, at least two successive evaporators connected in series with regard to the liquid that is being evaporated, and a duct system through which heating steam is supplied to the evaporators and which has been provided with at least two blowers or equivalent pieces of equipment increasing the steam pressure.
  • the apparatus is characterized in that the blowers have been connected in series so that one of them constitutes the main blower, connected by means of ducts, on one hand, to the first evaporator in the series and, on the other hand, to the second blower serving as auxiliary blower, and that the auxiliary blower has been connected by means of a duot to the latter evaporator in the series.
  • the invention is described in the. following in greater detail with the aid of an example, with reference to the attached drawing, presenting an evaporation apparatus according to the invention.
  • the apparatus depicted in the drawing comprises two successive evaporators 1 and 2 connected in. series and through which the liquid to be evaporated, passing along the conduits 3, 4 and 5, is conducted.
  • the evaporation is effected by means of steam, this steam being mostly made up of the vapour which separates from the liquid to be evaporated, in the evaporators 1 and 2.
  • This steam obtained from the liquid that is being evaporated is removed from the evaporators 1 and 2 into the ducts 6 and 7 and further conducted through the ducts 8, 9 and 10 as heating steam back to the evaporators.
  • With the duct 7 connects the duct 11, through which it is possible to carry into the apparatus external steam to maintain the thermal equilibrium.
  • the duct system 6-11 has been provided with two blowers 12 and 13, by which the pressure and temperature of the heating steam are increased in requisite degree.
  • the blower 12 in duct 8 operates as main blower, through which passes all the heating steam used towards evaporating. The main part of this steam is conducted to act as heating steam, to the first evaporator 1 in the series, and the remainder is conducted through the duct 9 to the blower 13 serving as auxiliary blower, and thence further through the duct 10 to becomme heating steam, to the latter evaporator 2 in the series.
  • the condensate formed of the heating steam is removed from the evaporators 1 and 2 into conduits 14 and 15.
  • the power rating of the auxiliary blower 13 may be on the order of 1/10 to 1/5 of the rating of the main blower 12.
  • the main blower 12 is arranged to operate under optimum conditions, and it is not regulated during the evaporation process, for which reason it need not be provided with energy-consuming regulating means.
  • the drop of evaporating efficiency taking place during the process owing to soiling of the evaporators 1 and 2 is exclusively compensated for by regulating the auxiliary blower 13, and to this purpose the auxiliary blower is provided with inverter, guide vane controller or equivalent lifting height regu lating means.
  • the control of the auxiliary blower 13 may in the case of high evaporating ratios be based on measurement of the end product density, and as a result of the high accuracy of control, higher than before solid matter concentrations are reached in the end product.
  • the pretreatment before the drying step, of whey used towards producing whey powder: this may take place e.g. in a spray tower dryer.
  • the solid matter content of the whey is increased from 6 to 60%, using for instance two successive evaporators, of which the first raises the solid matter content to about 20%.
  • the main blower may have a power rating about six times that of the auxiliary blower, and the process may be so dimensioned that the external heating steam required is at most a few per cent of the total amount of heating steam.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
  • Electric Connection Of Electric Components To Printed Circuits (AREA)

Abstract

Procédé et dispositif permettant d'exécuter l'évaporation dans au moins deux évaporateurs successifs (1, 2) reliés en série. Lors de l'évaporation, de la vapeur chauffante est utilisée, consistant au moins dans sa partie principale de la vapeur qui se sépare du liquide en cours d'évaporation, en combinaison avec le procédé d'évaporation. Le système de conduite d'alimentation en vapeur chauffante (6-11) est pourvu d'au moins deux soufflantes (12, 13) qui sont reliées en série de manière à constituer une première soufflante (12), reliée par des conduits (8, 9) aussi bien au premier évaporateur (1) dans la série qu'à la deuxième soufflante (13) servant de soufflante auxiliaire, et la soufflante auxiliaire est reliée par un conduit (10) au dernier évaporateur (2) de la série. La soufflante auxiliaire (13) possède une taille sensiblement plus réduite que la soufflante (12), et la commande du procédé peut être exécutée exclusivement à l'aide des organes de commande dont est pourvue la soufflante auxiliaire, réduisant ainsi la consommation totale d'énergie du procédé et permettant d'obtenir une commande précise de la teneur en matière solide du produit final à partir de l'étape d'évaporation.
PCT/FI1982/000056 1981-11-10 1982-11-10 Procede et dispositif d'evaporation WO1983001579A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
NL8220411A NL8220411A (nl) 1981-11-10 1982-11-10 Verdampingswerkwijze en inrichting daarvan.
DE3249168T DE3249168C2 (de) 1981-11-10 1982-11-10 Eindampfverfahren und -vorrichtung
DK318283A DK151182C (da) 1981-11-10 1983-07-11 Inddampningsfremgangsmaade og apparat

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI813551811110 1981-11-10
FI813551A FI63680C (fi) 1981-11-10 1981-11-10 Avdunstningsfoerfarande och anordning

Publications (1)

Publication Number Publication Date
WO1983001579A1 true WO1983001579A1 (fr) 1983-05-11

Family

ID=8514849

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/FI1982/000056 WO1983001579A1 (fr) 1981-11-10 1982-11-10 Procede et dispositif d'evaporation

Country Status (6)

Country Link
DE (1) DE3249168C2 (fr)
DK (1) DK151182C (fr)
FI (1) FI63680C (fr)
NL (1) NL8220411A (fr)
SE (1) SE8303898L (fr)
WO (1) WO1983001579A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009053518A2 (fr) * 2007-10-26 2009-04-30 Andritz Oy Dispositif pour évaporer des liquides

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT17768U3 (de) * 2022-09-27 2023-03-15 Gig Karasek Gmbh Anlage und Verfahren zur Aufkonzentrierung von substanzhaltigen Flüssigkeiten durch mehrstufiges Eindampfen

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1200996A (en) * 1912-10-14 1916-10-10 Techno Chemical Lab Ltd Method of evaporation, &c.
CH224633A (de) * 1941-11-27 1942-12-15 Sulzer Ag Eindampfanlage.
GB1157816A (en) * 1966-04-13 1969-07-09 Pietro Riva Improvements in and relating to Evaporators
DE2207085A1 (de) * 1971-02-17 1972-08-31 Oord, Jacob van, New Orleans, La. (V.StA.) Destillationsverfahren und Vorrichtung zum Behandeln von Flüssigkeiten
FR2496482A3 (fr) * 1980-12-19 1982-06-25 Laguilharre Sa Procede et installation d'evaporation a compression mecanique de vapeur avec mise en oeuvre d'un compresseur a plusieurs etages

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1200996A (en) * 1912-10-14 1916-10-10 Techno Chemical Lab Ltd Method of evaporation, &c.
CH224633A (de) * 1941-11-27 1942-12-15 Sulzer Ag Eindampfanlage.
GB1157816A (en) * 1966-04-13 1969-07-09 Pietro Riva Improvements in and relating to Evaporators
DE2207085A1 (de) * 1971-02-17 1972-08-31 Oord, Jacob van, New Orleans, La. (V.StA.) Destillationsverfahren und Vorrichtung zum Behandeln von Flüssigkeiten
FR2496482A3 (fr) * 1980-12-19 1982-06-25 Laguilharre Sa Procede et installation d'evaporation a compression mecanique de vapeur avec mise en oeuvre d'un compresseur a plusieurs etages

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009053518A2 (fr) * 2007-10-26 2009-04-30 Andritz Oy Dispositif pour évaporer des liquides
WO2009053518A3 (fr) * 2007-10-26 2009-06-04 Andritz Oy Dispositif pour évaporer des liquides

Also Published As

Publication number Publication date
SE8303898D0 (sv) 1983-07-08
DK318283A (da) 1983-07-11
FI63680B (fi) 1983-04-29
DE3249168C2 (de) 1994-02-24
DK151182C (da) 1993-03-15
DK151182B (da) 1987-11-09
DE3249168T1 (de) 1983-11-17
FI63680C (fi) 1983-08-10
DK318283D0 (da) 1983-07-11
NL8220411A (nl) 1983-10-03
SE8303898L (sv) 1983-07-08

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