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FR2373321A1 - Filtering gases contg. very fine particle e.g. of iron oxide - with precoat of coarse particles formed on external walls of filter sleeve to prevent silting up - Google Patents

Filtering gases contg. very fine particle e.g. of iron oxide - with precoat of coarse particles formed on external walls of filter sleeve to prevent silting up

Info

Publication number
FR2373321A1
FR2373321A1 FR7637044A FR7637044A FR2373321A1 FR 2373321 A1 FR2373321 A1 FR 2373321A1 FR 7637044 A FR7637044 A FR 7637044A FR 7637044 A FR7637044 A FR 7637044A FR 2373321 A1 FR2373321 A1 FR 2373321A1
Authority
FR
France
Prior art keywords
filter
gas
precoat
silting
external walls
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
FR7637044A
Other languages
French (fr)
Other versions
FR2373321B1 (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.)
Air Industrie SA
Original Assignee
Air Industrie SA
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 Air Industrie SA filed Critical Air Industrie SA
Priority to FR7637044A priority Critical patent/FR2373321A1/en
Publication of FR2373321A1 publication Critical patent/FR2373321A1/en
Application granted granted Critical
Publication of FR2373321B1 publication Critical patent/FR2373321B1/fr
Granted legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/02—Particle separators, e.g. dust precipitators, having hollow filters made of flexible material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2273/00—Operation of filters specially adapted for separating dispersed particles from gases or vapours
    • B01D2273/12—Influencing the filter cake during filtration using filter aids

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Filtering Materials (AREA)

Abstract

Filtration of a gas contg. very small solid particles of microscopic and sub-microscopic size is described. The filter appts. comprises sleeve or pocket filters through which the gas passes, an inlet for the gas, an outlet for the purified gas and a hopper for the collection of the solid particles. Coarser particles are introduced in such a way that they form a layer on the external walls of the filter sleeves, preventing the silting up of the filter cloth by the small particles and the subsequent pressure loss across the filter. Used to filter the gas being emitted from a chamber in which such operations as the use of a blowpipe on steel ingots and the cutting a metal sheets with an oxygen flame are being carried out. These operations produce iron oxides of 0.01 to 5 mu particle size. The filter allows the evacuation of the gas into the atmos. The build-up of a precoat to prevent the silting up to the filter cloth reduces the loss of gas pressure across the filter.
FR7637044A 1976-12-08 1976-12-08 Filtering gases contg. very fine particle e.g. of iron oxide - with precoat of coarse particles formed on external walls of filter sleeve to prevent silting up Granted FR2373321A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7637044A FR2373321A1 (en) 1976-12-08 1976-12-08 Filtering gases contg. very fine particle e.g. of iron oxide - with precoat of coarse particles formed on external walls of filter sleeve to prevent silting up

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7637044A FR2373321A1 (en) 1976-12-08 1976-12-08 Filtering gases contg. very fine particle e.g. of iron oxide - with precoat of coarse particles formed on external walls of filter sleeve to prevent silting up

Publications (2)

Publication Number Publication Date
FR2373321A1 true FR2373321A1 (en) 1978-07-07
FR2373321B1 FR2373321B1 (en) 1981-12-18

Family

ID=9180830

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7637044A Granted FR2373321A1 (en) 1976-12-08 1976-12-08 Filtering gases contg. very fine particle e.g. of iron oxide - with precoat of coarse particles formed on external walls of filter sleeve to prevent silting up

Country Status (1)

Country Link
FR (1) FR2373321A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998046329A1 (en) * 1997-04-11 1998-10-22 Herding Gmbh Filtertechnik Filtering device for filtering solid particles out of a gaseous medium
CN108672300A (en) * 2018-06-21 2018-10-19 郑州睿科生化科技有限公司 A kind of silicon carbide micro-powder secondary filter

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998046329A1 (en) * 1997-04-11 1998-10-22 Herding Gmbh Filtertechnik Filtering device for filtering solid particles out of a gaseous medium
CN108672300A (en) * 2018-06-21 2018-10-19 郑州睿科生化科技有限公司 A kind of silicon carbide micro-powder secondary filter
CN108672300B (en) * 2018-06-21 2023-08-22 郑州西利康新材料有限公司 Secondary filtering device for silicon carbide micro powder

Also Published As

Publication number Publication date
FR2373321B1 (en) 1981-12-18

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Legal Events

Date Code Title Description
TP Transmission of property
ST Notification of lapse