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A dual-fuel low-emission combustor for a gas turbine
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Al technical title is built by PatSnap Al team. It summarizes the technical point description of the patent document.
A gas turbine and burner technology, which is applied to combustion chambers, combustion methods, combustion equipment, etc., can solve problems such as shortening the service life of gas turbines, achieve good market application prospects, increase service life, and reduce water consumption.
Active Publication Date: 2015-10-14
AECC SHENYANG ENGINE RES INST
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Problems solved by technology
[0006] The purpose of the present invention is to solve the problem that gas turbines burn gaseous fuels and liquid fuels and meet the requirements of low pollution emissions. If liquid fuels are used to spray water or steam to reduce emissions, an additional water supply or steam treatment system needs to be added, and at the same time greatly shorten the gas turbine. In order to solve problems such as the service life of the gas turbine, a dual-fuel low-emission burner for gas turbines is provided.
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Embodiment 1
[0031] This embodiment provides a dual-fuel low-emission burner for gas turbines, characterized in that: the dual-fuel low-emission burner for gas turbines includes a main burner, a liquid fuel inlet for the main burner, a secondary combustion Gas Fuel Inlet for Main Burner, Liquid Fuel Nozzle for Main Burner, Radial Swirl, Premix Sleeve, Cooling Cover, Gas Fuel Boom for Main Burner, Gas Fuel Inlet for Main Burner, Secondary Burner, Center Liquid Fuel Nozzle , connecting bolts;
[0032] Both the natural gas and diesel oil of the main burner are fed into the vane channel of the radial swirler, and the mixing of fuel and air is realized in the swirler vane channel and the downstream premixing sleeve;
[0033] The gas fuel supply of the main burner is in the form of a gas fuel spray rod extending into the radial swirler vane channel;
[0034] The liquid fuel supply of the main burner adopts a direct injection nozzle structure;
[0035] The liquid fuel nozzles of the main burner...
Embodiment 2
[0046] The difference with embodiment 1 is:
[0047] The gas fuel supply of the main burner adopts a direct injection nozzle structure;
[0048] The liquid fuel supply of the main burner adopts the centrifugal pressure atomizing nozzle structure.
[0049] Inclined cooling holes are designed on the outer wall of the premixing sleeve, the angle of inclination is 45° with the axial direction, which is used to blow off the fuel attached near the low-velocity area of the wall to prevent the occurrence of backfire.
Embodiment 3
[0051] The difference with embodiment 1 and 2 is:
[0052] The gas fuel supply of the main burner adopts the swirl vane nozzle structure;
[0053] The liquid fuel supply of the main burner adopts the spiral nozzle structure.
[0054] Inclined cooling holes are designed on the outer wall of the premixing sleeve, the angle of inclination is 75° with the axial direction, which is used to blow off the fuel attached near the low velocity area of the wall surface to prevent the occurrence of backfire.
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Abstract
The invention discloses a dual-fuel low-emission burner for a gas turbine. The dual-fuel low-emission burner comprises a main burner, a main burner liquid fuel inlet, a secondary burner gas fuel inlet, a main burner liquid fuel nozzle, a radial cyclone, a premixing sleeve, a cooling cover plate, a main burner gas fuel spray rod, a main burner gas fuel inlet, a secondary burner and a central liquid fuel nozzle, wherein both natural gas and diesel oil of the main burner are supplied into a blade channel of the radial cyclone, and mixing of fuels and the air is realized in the blade channel of the cyclone and the downstream premixing sleeve; the liquid fuel nozzle of the main burner is positioned close to the outlet of the blade channel of the radial cyclone. The dual-fuel low-emission burner has the advantages that gas fuels such as natural gas and liquid fuels such as diesel oil can be burnt, NOX emission is reduced by adopting a lean oil premixing way, the requirement of environment-friendly emission can be met without spraying water or water steam during burning of liquid fuels, the availability of the gas turbine is enhanced, and the burner has a good market application prospect.
Description
technical field [0001] The invention relates to the field of gas turbines, in particular to a dual-fuel low-emission burner for gas turbines. Background technique [0002] With the increase of environmental pressure and increasingly stringent environmental protection requirements, the NO X Pollutant emissions are strictly limited. In order to reduce NO in the combustion process of the gas turbine combustor X For the generation of pollutants, there are two main technical measures to reduce pollutant discharge. One measure is to pre-mix the fuel and excess air evenly in a lean-fuel premixed combustion method, by controlling the mixing ratio of fuel and air to reduce the flame temperature in the combustion zone and suppress NO in the combustion process. X generation of pollutants. Another measure is to spray water or steam into the combustion chamber to reduce the flame temperature in the combustion zone to reduce NO X purpose of discharge. [0003] In order to improve th...
Claims
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Application Information
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