A burner capable of injecting fluid at the outlet of the burner
A burner and ejector technology, applied in the combustion chamber, combustion method, combustion equipment and other directions, can solve the problems of unstable combustion and easy to produce oscillation, to enhance the combustion stability, reduce the flame height, and prevent the flame from being blown extinguished effect
Active Publication Date: 2017-12-01
INST OF ENGINEERING THERMOPHYSICS - CHINESE ACAD OF SCI
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Problems solved by technology
However, since the main flame is stable at the low-velocity edge of the shear layer, periodic vortex shedding will occur near the low-velocity region of the shear layer, and oscillations will easily occur near the stable point, and combustion instability will easily occur when operating in non-design conditions
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[0037] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be described in further detail below in conjunction with specific embodiments and with reference to the accompanying drawings. In the drawings of the present invention, the same reference numerals denote the same components.
[0038] In the burner that can inject fluid at the outlet of the burner according to the present invention, the fluid near the outlet of the burner is injected by the fluid participating in the combustion reaction. Under the control of the single-chip microcomputer, the amount of injected gas is automatically controlled according to the combustion state, which can be preheated. Combustion of reactants, promotion of fluid mixing in the combustion zone, improvement of combustion state, enhancement of combustion stability, shortening of flame length, widening the stable operating range of the burner, improving combustion efficienc...
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The invention discloses a combustor capable of injecting fluid at a combustor outlet. The combustor comprises an injection nozzle, an outlet cavity channel, a backflow cavity channel and a reactant cavity channel. The injection nozzle is arranged at an inlet of the combustor and used for injecting the fluid nearby the combustor outlet. The injection nozzle is contained at the lower end of the outlet cavity channel, and an injector drive fluid and suction fluid mixed fluid outlet is formed in the upper end of the outlet cavity channel. The reactant cavity channel is located on the outer side of the backflow cavity channel, a reactant inlet is formed in the lower end of the reactant cavity channel, and a reactant outlet is formed in the upper end of the reactant cavity channel. The backflow cavity channel is located between the outlet cavity channel and the reactant cavity channel, an injector sucked fluid inlet is formed in the upper end of the backflow cavity channel, and a plurality of injected fluid suction holes are formed in the wall, between the lower end of the backflow cavity channel and the outlet cavity channel, at the lower end of the backflow cavity channel so that injected fluid can flow into the outlet cavity channel from the injector sucked fluid inlet. According to the combustor, the aims of preventing the combustor from shutting down and enhancing the combustion stability are achieved, and the effects of improving combustion efficiency and reducing pollutant emissions are further obtained.
Description
technical field [0001] The invention relates to the field of combustion devices, in particular to a burner capable of injecting fluid from the outlet of the burner. Background technique [0002] Gas turbines are widely used in electric power, aviation, petrochemical and other industries due to their small size and large output power. Due to the energy crisis and environmental deterioration, it is urgent to develop high-efficiency and clean combustion chambers, which are required to have the characteristics of reliable ignition, stable combustion, high efficiency and low emissions. At present, the problem of environmental pollution in our country is very serious, and it is very urgent to develop clean combustion technology of gas turbines. Gas turbine manufacturers have developed a variety of clean combustion technologies, such as lean premixed combustion technology, dilute-phase premixed pre-evaporation technology, lean oil direct injection technology, and catalytic combust...
Claims
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IPC IPC(8): F23R3/28
CPCF23R3/28F23R2900/03343
Inventor 李钢
Owner INST OF ENGINEERING THERMOPHYSICS - CHINESE ACAD OF SCI