| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a mixed combustion system and a fuel gas mixing unit, configured as a mixing mechanism section mounted on the mixed combustion system, which improve operation cost reduction efficiency while securing stable operation of a combustion device in a manner that stably maintains a mixing rate of biogas with respect to main fuel gas in fuel gas to be supplied to the combustion device without requiring a communication interface between the mixing mechanism section and the combustion device.SOLUTION: In a mixed combustion system, a mixing mechanism section 10 has: a check valve 13 which is arranged at an upstream side of a biogas introduction port 21 on a main pipe conduit 12 and shuts off a gas flow toward a main fuel gas inflow section 11 on the main pipe conduit 12; and a pressure equalizing valve 19 which is arranged on a biogas pipe conduit 18 and varies an opening thereof in a manner that maintains pressure balance between a pressure equalizing section 19a and an outlet side.</p> |
