FR2285169A1 - Preventing corrosion and dust deposition by gas effluents - in glass-melting installation by injecting alkaline powders into gas ducts - Google Patents

Preventing corrosion and dust deposition by gas effluents - in glass-melting installation by injecting alkaline powders into gas ducts

Info

Publication number
FR2285169A1
FR2285169A1 FR7431703A FR7431703A FR2285169A1 FR 2285169 A1 FR2285169 A1 FR 2285169A1 FR 7431703 A FR7431703 A FR 7431703A FR 7431703 A FR7431703 A FR 7431703A FR 2285169 A1 FR2285169 A1 FR 2285169A1
Authority
FR
France
Prior art keywords
melting
gas
glass
pref
sulphates
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
FR7431703A
Other languages
French (fr)
Other versions
FR2285169B1 (en
Inventor
Makoto Kikuchi
Kichiro Onimura
Teruo Motokura
Susumu Kawakami
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 FR7431703A priority Critical patent/FR2285169A1/en
Publication of FR2285169A1 publication Critical patent/FR2285169A1/en
Application granted granted Critical
Publication of FR2285169B1 publication Critical patent/FR2285169B1/fr
Granted legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B17/00—Methods preventing fouling
    • 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

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

Corrosion of effluent gas ducts in glass melting installations is suppressed by uniformly introducing into the aggressive effluent gases a finely pulverised cpd., pref. an oxide or hydroxide of Mg,Ca,Na or K. The powder (5-10 mu, pref. 10 mu) is injected into the gases in an amt. of 1-10 mg.equiv/Nm3 (pref. 4-8 mg. equiv./Nm3). Corrosive sulphuric vapours and particles of low-melting pyrosulphates or bisulphate of Na,K, and also their carbonates, sulphates, etc. contained in effluent gases from glass-melting installations, react with each other when the temp. of the gas phase drops below 460 degrees C forming low-melting substances corroding the installations and forming deposits reducing the heat transfer rate. Iron is attacked by the pyrosulphates and bisulphates of Na and K with formation of FeSO4. The injection of the oxides or hydroxides of alkali(ne earth) metals neutralises the acid components of the gas effluents; high-melting neutral sulphates are formed; corrosion is prevented; deposn. of dust is reduced because the particles of the high-melting sulphates are not tacky of temps. below 460 degrees C.
FR7431703A 1974-09-19 1974-09-19 Preventing corrosion and dust deposition by gas effluents - in glass-melting installation by injecting alkaline powders into gas ducts Granted FR2285169A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7431703A FR2285169A1 (en) 1974-09-19 1974-09-19 Preventing corrosion and dust deposition by gas effluents - in glass-melting installation by injecting alkaline powders into gas ducts

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7431703A FR2285169A1 (en) 1974-09-19 1974-09-19 Preventing corrosion and dust deposition by gas effluents - in glass-melting installation by injecting alkaline powders into gas ducts

Publications (2)

Publication Number Publication Date
FR2285169A1 true FR2285169A1 (en) 1976-04-16
FR2285169B1 FR2285169B1 (en) 1977-03-25

Family

ID=9143253

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7431703A Granted FR2285169A1 (en) 1974-09-19 1974-09-19 Preventing corrosion and dust deposition by gas effluents - in glass-melting installation by injecting alkaline powders into gas ducts

Country Status (1)

Country Link
FR (1) FR2285169A1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1985002453A1 (en) * 1983-11-25 1985-06-06 Waagner-Biró Aktiengesellschaft Process for separating acid polluting gas and combustion plant
FR2562442A1 (en) * 1984-04-10 1985-10-11 Hitachi Shipbuilding Eng Co PROCESS FOR THE PURIFICATION OF EXHAUST GAS
EP0253480A2 (en) * 1986-06-16 1988-01-20 Wallace B. Smith Process for removal of particulates and SO2 from combustion gases

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3211423A1 (en) * 1982-03-27 1983-09-29 Karrena GmbH, 4000 Düsseldorf METHOD FOR REDUCING THE RAIN OF ACID

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
NEANT *

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1985002453A1 (en) * 1983-11-25 1985-06-06 Waagner-Biró Aktiengesellschaft Process for separating acid polluting gas and combustion plant
FR2562442A1 (en) * 1984-04-10 1985-10-11 Hitachi Shipbuilding Eng Co PROCESS FOR THE PURIFICATION OF EXHAUST GAS
DE3511759A1 (en) * 1984-04-10 1985-10-17 Hitachi Zosen Corp., Osaka METHOD AND DEVICE FOR PURIFYING EXHAUST GAS
EP0253480A2 (en) * 1986-06-16 1988-01-20 Wallace B. Smith Process for removal of particulates and SO2 from combustion gases
EP0253480A3 (en) * 1986-06-16 1988-04-06 Wallace B. Smith Process for removal of particulates and so2 from combustion gases

Also Published As

Publication number Publication date
FR2285169B1 (en) 1977-03-25

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Legal Events

Date Code Title Description
DL Decision of the director general to leave to make available licences of right
ST Notification of lapse