A dual-fuel nozzle for plasma-catalyzed gaseous fuel

Abstract

The invention provides a dual-fuel nozzle for plasma catalysis gaseous fuel. The dual-fuel nozzle for the plasma catalysis gaseous fuel mainly comprises a low-temperature plasma discharging assembly, a gas circuit assembly, an oil circuit assembly and a nozzle fixing device. Cracked gas fuel enters an annular discharging gap of the low-temperature plasma discharging assembly in the radial direction and has a reforming reaction under the low-temperature plasma catalytic action to be converted into reformed gas with the higher heat value, a gas plasma micelle remaining after the catalytic reaction can be contained inside the reformed gas, the inflammability of the reformed gas is improved, finally the reformed gas flows out in a rotating mode through a gas flow guiding plate to form a recirculating zone, and the stability of burning is improved. According to the dual-fuel nozzle for the plasma catalysis gaseous fuel, the oil circuit assembly stretches into an external electrode of the low-temperature plasma discharging assembly, space can be saved, the oil supply states of oil and gas circuits can be controlled, the oil and gas circuits can be closed independently or simultaneously, the requirements for starting power and variable working condition power are met, the gas circuit assembly can also be utilized for spraying water, and NOx emission is reduced.

Description

technical field [0001] The invention relates to a gas turbine, in particular to a nozzle of the gas turbine. Background technique [0002] Energy is one of the most challenging needs of human beings today, and my country is a big energy consumer, so it is imperative to develop ways to rationally utilize existing energy. Chemical regenerative cycle (CRGT) is a new type of advanced gas turbine cycle that can effectively improve energy efficiency. A gas turbine combustor using a chemical regenerative cycle requires dual-fuel nozzles to start with diesel fuel and switch to pyrolysis gas after combustion is stable. However, the pyrolysis gas produced by the regenerator is a low-to-medium calorific value fuel, which is non-flammable and has low combustion efficiency, resulting in poor working stability and economical efficiency of the combustion chamber. Reasonable nozzle architecture design will play a vital role in energy utilization. At present, most of the dual-fuel nozzle ...

AI Technical Summary

Problems solved by technology

However, there are few designs that consider the utilization efficiency of gaseous fuel. After all, the gas turbine using the chemical regenerating cycle uses cracked gas for stable combustion, so the utilization efficiency of cracked gas deserves attention.

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