Mixture supply system, the air-fuel mixture supply device for use in air-fuel mixture feed system method and mixture supply system operation

摘要

PROBLEM TO BE SOLVED: To provide a gaseous mixture supply system which shortens a start-up time required, suppresses loss of reserve fuel gas upon start-up and, at the same time, can supply proper gaseous mixture from the beginning of the start-up.SOLUTION: A gaseous mixture supply system includes: a gaseous mixture preparation part N which mixes air A to reserve fuel gas G2 and prepares gaseous mixture Gm combustible in a combustion device S configured such that normal fuel gas can be combusted therein; a reserve fuel supply path 2 which is communicated and connected with a normal fuel supply path 1 for supplying the normal fuel gas to the combustion device S and supplies the gaseous mixture Gm prepared on the gaseous mixture preparation part N to the combustion device S; and reserve path opening and closing means V which can freely open and close the reserve fuel supply path 2. Therein, an internal volume of a purge channel part 2p in the upstream side from a portion which is opened and closed by the reserve path opening and closing means V is preset as a predetermined preset volume, a release part 4 used upon switching which can release gas in the purge channel part 2p to an external part and opening and closing means 5 for purging upon switching which can freely open and close the release part 4 used upon switching are provided.