| 摘要 |
PROBLEM TO BE SOLVED: To collect a produced gas stably and efficiently while avoiding flame extinguishing by seawater and mixing of exhaust gas into the produced gas.SOLUTION: A gas-hydrate collecting system is located in a gas-hydrate layer H, and comprises: a combustion heater 120 for heating and melting gas-hydrate of the gas-hydrate layer; and a collecting pipeline 140 for collecting a produced gas produced from gas-hydrate by melting, and having one end as a collecting port 140a disposed near the combustion heater. The combustion heater includes: a combustion chamber 124 in which a fuel gas is burnt; an introduction part 122 through which the fuel gas is guided and having an injection nozzle 122b for injecting the fuel gas into the combustion chamber on one end side thereof; and a derivation part 126 which is a pipe housing at least the injection nozzle of the introduction part in its inside and through which exhaust gas after combustion in the combustion chamber flows. One end 126a of the derivation part on the side where the injection nozzle is positioned is sealed, and the combustion chamber is formed in the inside of one end side of the derivation part. |
