Expounded character of gas-turbine generating set, reciprocating internal combustion generating set and all kinds of fuel gas, and difficulty and economical benefit using all kinds of fuel gas.

Based on the concentration of drained gas, gas turbine or gas internal combustion engine can be selected to realize combined heat and power production with considerable benefits.

Based on the concentration of drained gas, gas turbine or gas internal combustion engine can be selected to realize combined heat and power production with considerable benefits.