LIQUEFIED GAS SUPPLY DEVICE AND METHOD

摘要

PROBLEM TO BE SOLVED: To provide a liquefied gas supply device which prevents an abnormal increase in supply pressure due to a malfunction of a pressure reducing valve.SOLUTION: A liquefied gas supply device comprises: a plurality of liquefied gas containers 1 connected through a manifold 2; supply pipe 3 which supplies a gas utilization facility with gas extracted from the liquefied gas containers 1 through the manifold 2; a first pressure reducing valve 4 which maintains constant gas supply pressure in the supply pipe at a side of the gas utilization facility; detection means 12 which detects a gas consumption amount at the gas utilization facility; control means 15 which controls a gas supply amount from the plurality of liquefied gas containers 1 on the basis of the gas consumption amount detected by the detection means 12; and a cutoff valve 16 which cuts off gas flowing into the first pressure reducing valve 4 in the supply pipe 3 when the control means 15 stops gas supply from the plurality of liquefied gas containers 1. Thus, the liquefied gas supply device can prevent abnormal increase in gas supply pressure even when a solid substance is attached to the first pressure reducing valve 4.