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WO1993017769A1 - Procede d'evaporation d'un liquide a flux massique variable - Google Patents

Procede d'evaporation d'un liquide a flux massique variable Download PDF

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Publication number
WO1993017769A1
WO1993017769A1 PCT/DE1992/000175 DE9200175W WO9317769A1 WO 1993017769 A1 WO1993017769 A1 WO 1993017769A1 DE 9200175 W DE9200175 W DE 9200175W WO 9317769 A1 WO9317769 A1 WO 9317769A1
Authority
WO
WIPO (PCT)
Prior art keywords
heat exchanger
medium
heat
liquid medium
exchanger housing
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.)
Ceased
Application number
PCT/DE1992/000175
Other languages
German (de)
English (en)
Inventor
Oskar Schatz
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to PCT/DE1992/000175 priority Critical patent/WO1993017769A1/fr
Publication of WO1993017769A1 publication Critical patent/WO1993017769A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D1/00—Evaporating
    • B01D1/16—Evaporating by spraying
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D1/00—Evaporating
    • B01D1/04—Evaporators with horizontal tubes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D1/00—Evaporating
    • B01D1/22—Evaporating by bringing a thin layer of the liquid into contact with a heated surface

Definitions

  • the invention relates to a method for evaporation of a liquid medium with a variable flow rate, in which the medium is passed through a heat exchanger housing and the heat of vaporization is supplied to it in the heat exchanger housing by contact with heat exchanger surfaces running in the flow direction of the medium.
  • the vaporous medium leaves the heat exchanger housing at the upper end, with the liquid medium usually being supplied at the lower end of the housing, thereby promoting the separation of the vaporous from the liquid phase.
  • volume control of the medium on the steam side of the heat exchanger requires a much greater effort, because in addition to the flow control e.g.
  • Pressure and temperature of the vaporous medium are continuously determined and must be taken into account as control parameters.
  • the invention has for its object to improve a method of the type mentioned in such a way that the control of the mass flow can be carried out on the input side of the heat exchanger and is effective without delay on the output side, even if the medium supplied is not in the heat exchanger completely evaporated.
  • REPLACEMENT LEAF This prevents the accumulation of non-evaporated liquid in the area of the heat exchanger, so that a quantity regulation carried out in the area of the liquid medium flowing to the heat exchanger has a delay-free effect on the medium leaving the heat exchanger.
  • the heat exchanger is used to evaporate a fuel which then has to be mixed with an oxidant, an increased vapor pressure is desirable to promote the formation of the mixture.
  • the vapor pressure is regulated by changing the outlet cross section on the heat exchanger housing.
  • a heat exchanger serving as an evaporator as shown in the drawing.
  • a heat exchanger designated overall by 10, encloses, with a housing 12, a steam chamber 14, at the upper end of which an injection valve 16 for a liquid medium to be evaporated is used to regulate the quantity.
  • An outflow opening 18 is located at the deepest point of the steam space 14, so that an accumulation of liquid medium in the steam space 14 is excluded.
  • a line 20 for a heat transfer medium traverses the steam room 14 with a supply line 22 and a return line 24, this line 20 being provided with ribs 26 in the interior of the steam room in order to provide the largest possible heated surface in the form of heat exchanger surfaces 2R create about in the flow direction of the medium in the vertical direction run.
  • the injection valve 16 is arranged such that it injects the liquid medium from above approximately tangentially onto the heat exchanger surfaces.
  • the liquid medium runs down under the influence of gravity on the heat exchanger surfaces 28 and is evaporated by the absorption of heat.
  • the steam flows downward out of the outflow opening 18 under the effect of the steam pressure which is formed, an approximately undevaporated rest of the liquid being carried away by the steam.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)

Abstract

Afin d'évaporer un liquide à flux massique variable, on fait passer le liquide de haut en bas par le boîtier d'un échangeur thermique dans lequel la chaleur d'évaporation lui est transmise par contact avec les surfaces de l'échangeur thermique s'étendant dans le sens d'écoulement du liquide. Le liquide sort ensuite à l'endroit le plus profond du boîtier de l'échangeur thermique.
PCT/DE1992/000175 1992-03-03 1992-03-03 Procede d'evaporation d'un liquide a flux massique variable Ceased WO1993017769A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/DE1992/000175 WO1993017769A1 (fr) 1992-03-03 1992-03-03 Procede d'evaporation d'un liquide a flux massique variable

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/DE1992/000175 WO1993017769A1 (fr) 1992-03-03 1992-03-03 Procede d'evaporation d'un liquide a flux massique variable

Publications (1)

Publication Number Publication Date
WO1993017769A1 true WO1993017769A1 (fr) 1993-09-16

Family

ID=6874865

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE1992/000175 Ceased WO1993017769A1 (fr) 1992-03-03 1992-03-03 Procede d'evaporation d'un liquide a flux massique variable

Country Status (1)

Country Link
WO (1) WO1993017769A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19747034A1 (de) * 1997-10-24 1999-04-29 Dbb Fuel Cell Engines Gmbh Vorrichtung zum Verdampfen und Überhitzen eines flüssigen Reaktant-Massenstroms

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL109726C (fr) *
US2914120A (en) * 1957-01-09 1959-11-24 Dow Chemical Co Devolatilizer
US3191662A (en) * 1962-07-18 1965-06-29 Kenneth J Schneider Continuous solution concentrator
US3298797A (en) * 1965-11-29 1967-01-17 Hooker Chemical Corp Alkali metal hydroxide evaporation
FR1579254A (fr) * 1967-09-04 1969-08-22
US4764254A (en) * 1987-05-21 1988-08-16 Rosenblad Corporation Falling film liquor heater having a screen to prevent clogging of a liquid distributing tray

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL109726C (fr) *
US2914120A (en) * 1957-01-09 1959-11-24 Dow Chemical Co Devolatilizer
US3191662A (en) * 1962-07-18 1965-06-29 Kenneth J Schneider Continuous solution concentrator
US3298797A (en) * 1965-11-29 1967-01-17 Hooker Chemical Corp Alkali metal hydroxide evaporation
FR1579254A (fr) * 1967-09-04 1969-08-22
US4764254A (en) * 1987-05-21 1988-08-16 Rosenblad Corporation Falling film liquor heater having a screen to prevent clogging of a liquid distributing tray

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19747034A1 (de) * 1997-10-24 1999-04-29 Dbb Fuel Cell Engines Gmbh Vorrichtung zum Verdampfen und Überhitzen eines flüssigen Reaktant-Massenstroms

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