Global Patent Index - EP 2676124 A1

EP 2676124 A1 20131225 - LASER GAS ANALYSIS

Title (en)

LASER GAS ANALYSIS

Title (de)

LASERGASANALYSE

Title (fr)

ANALYSE DE GAZ PAR LASER

Publication

EP 2676124 A1 20131225 (FR)

Application

EP 12708892 A 20120209

Priority

  • FR 1151167 A 20110214
  • FR 2012050286 W 20120209

Abstract (en)

[origin: WO2012168588A1] The invention relates to a device for measuring the concentration of a molecule such as CO, NO, or NO2 in a gaseous atmosphere, at a temperature of more than 1,200ºC, in an enclosure, said molecule including an absorption line having a wavelength of between 4 and 8 micrometers, said device including an emitter (2) of laser radiation having a wavelength corresponding to that of the absorption line, said emitter (2) emitting laser radiation through a first window (4) and then through said atmosphere (7), said window (4) being made of a solid material having a transmittance, for a thickness of 1 mm of the material, that is greater than 50% of the wavelength of the laser radiation, the laser radiation being analyzed after an analyzer (11) has passed through said atmosphere (7), said analyzer determining the absorption of the laser radiation by the molecule in the gaseous atmosphere (7), the window (4) being arranged on or in a wall (6, 10) of the enclosure, if necessary via an insert, in order to prevent the hot atmosphere (7) of the enclosure from egressing therefrom. The invention enables the equipment upon which it is mounted to be measured continuously and during normal operation. The device according to the invention can be provided on a glass furnace, and can continuously measure the concentration of gas species in the hot atmosphere (7) during the normal operation of the furnace (1), thereby enabling the furnace burners to be adjusted during operation.

IPC 8 full level

G01N 21/35 (2006.01); G01N 21/39 (2006.01); G01N 21/85 (2006.01)

CPC (source: EP KR US)

C03B 5/235 (2013.01 - EP US); G01N 21/3504 (2013.01 - EP KR US); G01N 21/39 (2013.01 - KR); G01N 21/61 (2013.01 - US); G01N 2201/0612 (2013.01 - EP US)

Citation (search report)

See references of WO 2012168588A1

Citation (examination)

Designated contracting state (EPC)

AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

DOCDB simple family (publication)

FR 2971587 A1 20120817; FR 2971587 B1 20131018; BR 112013019480 A2 20201027; CL 2013002327 A1 20131206; CN 103354900 A 20131016; CN 103354900 B 20160615; EA 201391182 A1 20131230; EP 2676124 A1 20131225; JP 2014509393 A 20140417; KR 20140040105 A 20140402; US 2013313436 A1 20131128; US 9297757 B2 20160329; WO 2012168588 A1 20121213

DOCDB simple family (application)

FR 1151167 A 20110214; BR 112013019480 A 20120209; CL 2013002327 A 20130809; CN 201280008773 A 20120209; EA 201391182 A 20120209; EP 12708892 A 20120209; FR 2012050286 W 20120209; JP 2013553982 A 20120209; KR 20137020891 A 20120209; US 201213984213 A 20120209