| 摘要 |
<P>PROBLEM TO BE SOLVED: To stabilize the orderizing concentration. <P>SOLUTION: The facility for odorizing biogas is provided, being such that: the pressure of a nitrogen gas fed into an odorizer tank 3 is kept constant by a pressure-reducing valve 8 installed in nitrogen gas piping 7 to effect continually pressurizing an odorizer in the tank 3 by the nitrogen gas at a given pressure; and thus even if the amount of the odorizer in the tank 3 is decreased, the internal pressure of the tank 3 causes no reduction, leading to constant pressure on the inlet side of a metering pump 5; and furthermore thanks to a back-pressure valve 9 installed in an odorizer piping 6, the pressure on the outlet side of the metering pump 5 lies constant without being influenced by the pressure variation of biogas going through a biogas piping 21; and therefore the injection level of the odorizer is stabilized, leading to odorizing level stabilization. <P>COPYRIGHT: (C)2013,JPO&INPIT |
