Burners, burner arrays and combustion units with adjustable flow nozzles

Abstract

The invention provides a combustor with an adjustable flow nozzle, a combustor array and a combustion device. The combustor comprises the adjustable flow nozzle and a mixing rectification piece. The adjustable flow nozzle comprises an outer-layer barrel and an inner-layer barrel. An inner-layer runner is formed in the inner-layer barrel. An outer-layer runner is formed between the inner-layer barrel and the outer-layer barrel. An airflow inlet of the inner-layer barrel is provided with a turbulent flow grid plate. A plasma exciter is arranged on the inner wall of the outer-layer barrel. Air and fuel enter the mixing rectification piece and form a combustible mixture, one part of the combustible mixture enters the outer-layer runner, and the other part of the combustible mixture enters the inner-layer runner through the turbulent flow grid plate. By means of the turbulent flow grid plate, the proportions of the parts, entering the outer-layer runner and the inner-layer runner, of the combustible mixture are adjusted. According to the combustor with the adjustable flow nozzle, the combustor array and the combustion device, combustion stability can be improved, generated NOx can be reduced, flow losses can be reduced, and tempering can be avoided.

Description

Technical field [0001] The present invention relates to the technical field of combustion devices, and in particular to a combustor with adjustable flow nozzles, a combustor array and a combustion device, which is particularly suitable for various industrial combustion devices such as gas turbines, boilers, and chemical furnaces. 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 the deterioration of the environment, there is an urgent need to develop an efficient and clean combustion chamber, which requires reliable ignition, stable combustion, high efficiency and low emissions. The current environmental pollution problem in my country is very serious, and the development of clean combustion technology for gas turbines is very urgent. Gas turbine manufacturers have developed a variety of clean combustion technologies, such as lean ...

AI Technical Summary

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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