Gas circuit axial grading type dual-fuel nozzle

Abstract

The invention aims to provide a gas circuit axial grading type dual-fuel nozzle which comprises a gas circuit outer wall and a main oil circuit wall arranged inside the gas circuit outer wall. An auxiliary oil circuit wall is arranged inside the main oil circuit wall. A main oil circuit channel is formed between the main oil circuit wall and the auxiliary oil circuit wall. An auxiliary oil circuit channel is formed inside the auxiliary oil circuit wall. A gas circuit is formed between the gas circuit outer wall and the main oil circuit wall. The gas circuit comprises a gas circuit front cavity, a gas circuit laryngeal and a gas circuit rear cavity in sequential communication. A first level gas circuit gas ejection hole is formed in a position, arranged on the gas circuit front cavity, of the gas circuit outer wall. A laryngeal gas ejection hole is formed in the gas circuit laryngeal. A second level gas circuit gas ejection hole is formed in the gas circuit rear cavity. Due to the fact that a gas circuit axial grading type structure is adopted, the gas circuit axial grading type dual-fuel nozzle has the advantages of reducing the radial size of the nozzle, simultaneously increasing gas circuit flow area, enhancing mixing of fuel and air, strengthening burning, shortening flame, and simultaneously not burning the wall surface of a flame tube. When liquid fuel is burned, water vapor reinjection is conducted by the gas circuit.

Description

technical field [0001] The invention relates to a gas turbine, in particular to a fuel 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. The chemical regenerative cycle is a new type of advanced cycle method, which mainly uses the low-end waste heat of the exhaust gas of the gas turbine 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 genera...

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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 the exit of the combustion chamber The uniformity of the temperature field is reduced, which deteriorates the working environment of the gas turbine blades

The patent "Dual fuel nozzle" (application number US19990470592) and the patent "DUAL FUEL NOZZLE" (application number JP19980367255) increase the flow area of ​​the gas by increasing the airflow channel in the radial direction, and the modification of the combustion chamber is relatively large

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