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US3600282A - Control of two reflux streams in a fractional separation system - Google Patents

Control of two reflux streams in a fractional separation system

Info

Publication number
US3600282A
US3600282A US776951A US3600282DA US3600282A US 3600282 A US3600282 A US 3600282A US 776951 A US776951 A US 776951A US 3600282D A US3600282D A US 3600282DA US 3600282 A US3600282 A US 3600282A
Authority
US
United States
Prior art keywords
reflux
flow rate
liquid
streams
control
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 - Lifetime
Application number
US776951A
Inventor
Dale E Lupfer
James W Hobbs
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.)
Phillips Petroleum Co
Original Assignee
Phillips Petroleum Co
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 Phillips Petroleum Co filed Critical Phillips Petroleum Co
Application granted granted Critical
Publication of US3600282A publication Critical patent/US3600282A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • 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
    • B01D3/42—Regulation; Control
    • B01D3/4211—Regulation; Control of columns
    • B01D3/4227—Head- and bottom stream
    • 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
    • B01D1/2815—At least one source is a compressor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D1/00—Evaporating
    • B01D1/28—Evaporating with vapour compression
    • B01D1/284—Special features relating to the compressed vapour
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D1/00—Evaporating
    • B01D1/28—Evaporating with vapour compression
    • B01D1/284—Special features relating to the compressed vapour
    • B01D1/2856—The compressed vapour is used for heating a reboiler or a heat exchanger outside an evaporator

Landscapes

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

Abstract

DETERMINE THE REQUIRED EXTERNAL REFLUX FLOW RATE. THE FLOW RATE OF ONE OF THE LIQUID STREAMS IS MANIPOLATED RESPONSIVE TO A DESIRED CONTROL CRITERIA WHILE THE FLOW RATE OF THE OTHER LIQUID STREAM IS MANIPULATED TO PROVIDE THE BALANCE OF THE EXTERNAL REFLUX.

IN A FRACTIONAL DISTILLATION SYSTEM HAVING TWO SOURCES OF LIQUID REFLUX STREAMS WHICH WILL PARTIALLY VAPORIZE WHEN COMBINED FOR SUCH USE, THE FLOW RATE AND TEMPERATURE OF EACH OF THE LIQUID REFLUX STREAMS ARE MEASURED AND SIGNALS REPRESENTATIVE THEREOF ARE APPLIED TO A COMPUTER-COMTROLLER. THE SIGNALS ARE COMBINED TO ESTABLISH A SIGNAL REPRESENTATIVE OF THE PREFLASH TEMPERATURE OF THE COMBINED STREAM, WHICH IS THEN EMPLOYED IN AN INTERNAL REFLUX CONTROL TO
US776951A 1968-11-19 1968-11-19 Control of two reflux streams in a fractional separation system Expired - Lifetime US3600282A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US77695168A 1968-11-19 1968-11-19

Publications (1)

Publication Number Publication Date
US3600282A true US3600282A (en) 1971-08-17

Family

ID=25108839

Family Applications (1)

Application Number Title Priority Date Filing Date
US776951A Expired - Lifetime US3600282A (en) 1968-11-19 1968-11-19 Control of two reflux streams in a fractional separation system

Country Status (1)

Country Link
US (1) US3600282A (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3905874A (en) * 1972-08-14 1975-09-16 Phillips Petroleum Co Fractionator column control system
US3912476A (en) * 1973-03-01 1975-10-14 Hitachi Ltd Air separating apparatus
US4096574A (en) * 1977-07-28 1978-06-20 Phillips Petroleum Company Fractionation control
US4298363A (en) * 1979-08-23 1981-11-03 Phillips Petroleum Co. Fractionator feed tank pressure control
US4894145A (en) * 1988-07-19 1990-01-16 Applied Automation, Inc. Automatic control of feedstock vacuum towers
US20100275646A1 (en) * 2007-03-01 2010-11-04 Heinz Bauer Method of Separating Off Nitrogen from Liquefied Natural Gas
US11225444B2 (en) * 2016-12-20 2022-01-18 Sabic Global Technologies B.V. Method of column control

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3905874A (en) * 1972-08-14 1975-09-16 Phillips Petroleum Co Fractionator column control system
US3912476A (en) * 1973-03-01 1975-10-14 Hitachi Ltd Air separating apparatus
US4096574A (en) * 1977-07-28 1978-06-20 Phillips Petroleum Company Fractionation control
US4298363A (en) * 1979-08-23 1981-11-03 Phillips Petroleum Co. Fractionator feed tank pressure control
US4894145A (en) * 1988-07-19 1990-01-16 Applied Automation, Inc. Automatic control of feedstock vacuum towers
US20100275646A1 (en) * 2007-03-01 2010-11-04 Heinz Bauer Method of Separating Off Nitrogen from Liquefied Natural Gas
US11225444B2 (en) * 2016-12-20 2022-01-18 Sabic Global Technologies B.V. Method of column control

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