A dual-fuel steam injection forward and reverse gas turbine combined cycle

Abstract

The invention relates to a clean fuel and biomass fuel dual-fuel steam injection direct-inverse gas turbine combined cycle. A backheating type steam injection-inverse gas turbine combined cycle form is adopted for a gas turbine, and clean fuel is adopted for the gas turbine; flue gas produced when biomass fuel burns in a boiler indirectly heats the air entering a combustion chamber of the gas turbine first and then preheats the air entering the boiler, wherein the steam cyclically produced by the gas turbine can be used for supplying heat to the outside. According to the dual-fuel steam injection direct-inverse gas turbine combined cycle, the gradient utilization principle of energy is utilized, an external combustion method and the advanced steam injection direct-inverse Brayton cycle are organically combined through system integration, the energy utilization efficiency of the biomass fuel can be substantially improved, the proportion of the biomass fuel to the clean fuel is adjustable, and self-balance of water consumption and water recovery for steam injection can be achieved.

Description

technical field [0001] The invention relates to the technical field of gas turbines, in particular to a dual fuel steam injection forward and reverse gas turbine combined cycle. Background technique [0002] A simple cycle gas turbine consists of a compressor, a combustor and a gas turbine (turbine for short). The compressor continuously draws in air from the atmosphere and compresses it. The compressed air enters the combustion chamber, mixes with the injected fuel, and burns to become high-temperature gas, which then flows into the turbine and expands to do work, pushing the turbine impeller to rotate together with the compressor impeller, and the residual work is used as the output mechanical work of the gas turbine and generate electricity. The gas temperature before the turbine inlet is called the initial gas temperature. In order to make full use of the exhaust waste heat of the gas turbine, a waste heat boiler is generally installed at the rear of the gas turbine t...

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Problems solved by technology

However, limited by the material of the high-temperature gas-gas heat exchanger, the air outlet temperature of the heated heat exchanger generally cannot exceed 900°C, resulting in the power supply efficiency of the external combustion gas-steam combined cycle at the current technical level. nor more than 32%

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