FR2203667A1 - Wet process for flue gas desulphurisation - by two stage absorption with recirculation of lime suspension giving efficient absorption and low lime loss - Google Patents

Wet process for flue gas desulphurisation - by two stage absorption with recirculation of lime suspension giving efficient absorption and low lime loss

Info

Publication number
FR2203667A1
FR2203667A1 FR7237634A FR7237634A FR2203667A1 FR 2203667 A1 FR2203667 A1 FR 2203667A1 FR 7237634 A FR7237634 A FR 7237634A FR 7237634 A FR7237634 A FR 7237634A FR 2203667 A1 FR2203667 A1 FR 2203667A1
Authority
FR
France
Prior art keywords
lime
absorption
flue gas
wet process
recirculation
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
FR7237634A
Other languages
French (fr)
Other versions
FR2203667B1 (en
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.)
Mitsubishi Heavy Industries Ltd
Original Assignee
Mitsubishi Heavy Industries Ltd
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 Mitsubishi Heavy Industries Ltd filed Critical Mitsubishi Heavy Industries Ltd
Priority to FR7237634A priority Critical patent/FR2203667A1/en
Publication of FR2203667A1 publication Critical patent/FR2203667A1/en
Application granted granted Critical
Publication of FR2203667B1 publication Critical patent/FR2203667B1/fr
Granted legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/46—Removing components of defined structure
    • B01D53/48—Sulfur compounds
    • B01D53/50—Sulfur oxides
    • B01D53/501—Sulfur oxides by treating the gases with a solution or a suspension of an alkali or earth-alkali or ammonium compound

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Biomedical Technology (AREA)
  • Environmental & Geological Engineering (AREA)
  • Analytical Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Treating Waste Gases (AREA)

Abstract

Wet process for desulphurisation of flue gas uses lime as absorbent. The gas contg. sulphur oxides is washed with a liq. absorbent contg. calcium hydroxide or calcium carbonate. The feature of the invention is use of two different absorption stages. The first stage is operated in a pH range of 3.5-4.5 and the second stage in a pH range of 6.5-7.5. The content of unreacted lime finally passing to the gypsum recovery plant is very low.
FR7237634A 1972-10-24 1972-10-24 Wet process for flue gas desulphurisation - by two stage absorption with recirculation of lime suspension giving efficient absorption and low lime loss Granted FR2203667A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7237634A FR2203667A1 (en) 1972-10-24 1972-10-24 Wet process for flue gas desulphurisation - by two stage absorption with recirculation of lime suspension giving efficient absorption and low lime loss

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7237634A FR2203667A1 (en) 1972-10-24 1972-10-24 Wet process for flue gas desulphurisation - by two stage absorption with recirculation of lime suspension giving efficient absorption and low lime loss

Publications (2)

Publication Number Publication Date
FR2203667A1 true FR2203667A1 (en) 1974-05-17
FR2203667B1 FR2203667B1 (en) 1975-04-25

Family

ID=9106129

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7237634A Granted FR2203667A1 (en) 1972-10-24 1972-10-24 Wet process for flue gas desulphurisation - by two stage absorption with recirculation of lime suspension giving efficient absorption and low lime loss

Country Status (1)

Country Link
FR (1) FR2203667A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0408092A1 (en) * 1983-09-09 1991-01-16 Babcock-Hitachi Kabushiki Kaisha Flue gas desulfurization process

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3632306A (en) * 1969-02-18 1972-01-04 Chemical Construction Corp Removal of sulfur dioxide from waste gases
FR2120758A5 (en) * 1970-12-29 1972-08-18 Mitsubishi Heavy Ind Ltd

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3632306A (en) * 1969-02-18 1972-01-04 Chemical Construction Corp Removal of sulfur dioxide from waste gases
FR2120758A5 (en) * 1970-12-29 1972-08-18 Mitsubishi Heavy Ind Ltd

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0408092A1 (en) * 1983-09-09 1991-01-16 Babcock-Hitachi Kabushiki Kaisha Flue gas desulfurization process

Also Published As

Publication number Publication date
FR2203667B1 (en) 1975-04-25

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