The invention relates to a
combustion engine combination cycle power
plant with low heat value, a co-production of the
combustion engine combination cycle thermal power
plant, an integrated
coal gasification cycle combination (IGCC) power
plant, and the like. The invention adopts the new technique of gas
turbine combined cycle power generating that the high and intermediate heat value gas cooperate with the low heat value gas, and the invention is a technology with high efficiency and low
pollution. A low
NOx burner provided with a gas
turbine and an
afterburner boiler adopt a self-cycle preheating heat-storing volution type low
NOx gas burning
system, therefore the
power consumption of the gas
supercharger can be reduced by 10-20 percent and the
thermal efficiency of the
electricity generating of the
combined cycle unit can be increased for 5-15 percent. The invention can also solve the problems of the technology difficulty for reconstructing the
system and the project cost. The invention can also provide stable
combustion for burning the low heat value gas (
blast furnace gas), can enable steam cycle
system to have larger installed capacity and higher efficiency, and can lower the kilowatt cost. The invention ensures that the
combined cycle thermal efficiency can reach about 60 percent, the
electricity generating efficiency of the power plant can reach about 55 percent, and the energy can be saved for above 80 percent. The invention can break through a
bottleneck that the investment and the
electricity generating cost of the intermediate low heat value gas electricity plant are much higher than that of
high heat value combined cycle power plant, namely the economic problem, and then the
investment cost of the intermediate low heat value gas power plant (or the IGCC) can be lowered greatly.