| 摘要 |
PROBLEM TO BE SOLVED: To easily obtain a required mixing ratio of LP gas g, biogas b and air a.SOLUTION: LP gas g and biogas b can flow in a gas engine E via a pair of parallel mixers (venturi mixers) 16a and 16b. When the biogas is less than 5 kPa, a valve R1 is opened and both mixers suck and mix air a by flowing of the LP gas and send the air to a cushion tank T. When the biogas is equal to or more than 5 kPa, the valve R1 is closed, a valve R2 is opened, and one mixer 16a sucks and mixes the biogas b by flowing of the LP gas and sends the biogas to the cushion tank T. Mixed gas gof the LP gas and the biogas is supplied from the cushion tank to the gas engine to use the biogas. As the suction and mixture of the LPG and the air and the suction and mixture of the LPG and the biogas are separately performed by two mixers, mixing setting of the gases becomes easy as compared with simultaneous mixing of the three. Town gas c is supplied to the gas engine in such a case that the biogas is less than 5 kPa. |
