Dual-fuel nozzle used for chemical regenerative cycle

Abstract

The invention provides a dual-fuel nozzle used for a chemical regenerative cycle. The dual-fuel nozzle used for the chemical regenerative cycle comprises a water vapor channel outer wall, a gas fuel channel outer wall, a main oil path pipeline, an auxiliary oil path pipeline and an oil path spout. The gas fuel channel outer wall is arranged in the water vapor channel outer wall. The main oil path pipeline is arranged in the gas fuel channel outer wall. The auxiliary oil path pipeline is arranged in the main oil path pipeline. A water vapor channel is formed between the water vapor channel outer wall and the gas fuel channel outer wall. A gas fuel channel is formed between the gas fuel channel outer wall and the main oil path pipeline. A main oil path is formed between the main oil path pipeline and the auxiliary oil path pipeline. An auxiliary oil path is arranged in the auxiliary oil path pipeline. An auxiliary oil path swirler is arranged on the end portion of the auxiliary oil path pipeline. The main oil path and an outlet of the auxiliary oil path swirler are communicated with the oil path spout. According to the dual-fuel nozzle used for the chemical regenerative cycle, water vapor and air are well mixed, emissions of a combustor are reduced, and a flameout phenomenon is avoided. Due to the fact that gas fuel and the air are well mixed, a combustion flame can be effectively shortened, and combustion efficiency can be improved.

Description

technical field [0001] The invention relates to a gas turbine, in particular to a nozzle of the gas turbine. Background technique [0002] Gas turbines are widely used in aviation, shipping, electric power, petroleum and many other industrial fields due to their advantages such as simple structure, high single-unit power, small weight and size, and good maneuverability. Therefore, the technical transformation and performance optimization of conventional gas turbine application technology has become an important topic to solve the energy crisis and environmental pollution problems. Chemical regenerative cycle is a new type of advanced cycle. It mainly uses the low-end waste heat of the gas turbine exhaust to generate superheated steam, and under the action of the catalyst, the fuel-steam is cracked to generate gaseous fuels such as methane, hydrogen and carbon monoxide. Studies have shown that if diesel oil is completely cracked, the heat generated by cracked gas combustion...

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Problems solved by technology

[0003] In order to ensure the same temperature at the exit of the combustion chamber, the mass flow rate of the pyrolysis gas must be much greater than the mass flow rate of the fuel oil. If the flow rate is too high, the mixture of the pyrolysis gas and air will be poor, and the flow field will be difficult to organize, which will easily cause the flame to elongate and cause the combustion chamber exit The uniformity of the temperature field is reduced, which deteriorates the working environment of the turbine blades of the gas turbine; when the fuel is injected, water vapor is reinjected through the nozzle, which reduces the investment in steam reinjection equipment, but when the steam flow rate is too high, a shielding layer will be formed around the fuel, causing combustion chamber Flame out will seriously affect the operation of the gas turbine

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