Flue gas recirculation combustion chamber with variable swirl

Abstract

The invention provides a flue gas backflow combustion chamber with variable rotational flow, which comprises a combustion chamber cavity, a combustion chamber throat arranged at the upper end of the combustion chamber cavity and a swirler blade structure arranged at the upper end of the combustion chamber throat, wherein the swirler blade structure comprises fixed swirler blades arranged at equalintervals, blade flow channels are formed between the fixed swirler blades, each blade flow channel is provided with a movable swirler blade, and a flue gas backflow channel is arranged between each blade flow channel and the combustion chamber cavity. According to the invention, the purpose of low emission can be achieved no matter under a high rotational flow condition or a low rotational flow condition.

Description

technical field [0001] The invention relates to a flue gas recirculation combustion chamber, in particular to a combustion chamber structure capable of adjusting swirl intensity and flue gas return flow rate, and achieving the goal of low emission no matter in high swirl flow condition or low swirl flow condition. Background technique [0002] In the traditional combustion chamber structure, the swirl intensity corresponds to the swirler structure one by one. After the combustion chamber is designed, even if it operates in different working conditions, the swirl intensity can only be maintained at the design strength, and cannot be adjusted according to the working conditions. Changes can be adjusted freely. Under the condition of strong swirl intensity, the internal circulation of the flue gas is strong, and the strong swirl flow entrains the downstream flue gas to reduce the oxygen concentration in the main combustion area, thereby reducing the combustion temperature in th...

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Problems solved by technology

[0002] In the traditional combustion chamber structure, the swirl intensity corresponds to the swirler structure one by one. After the combustion chamber is designed, even if it operates in different working conditions, the swirl intensity can only be maintained at the design strength, and cannot be adjusted according to the working conditions. Change free adjustment

Under the condition of strong swirl intensity, the internal circulation of the flue gas is strong, and the strong swirl flow entrains the downstream flue gas to reduce the oxygen concentration in the main combustion area, thereby reducing the combustion temperature in the main combustion area to achieve the goal of low emissions. However, when the swirl intensity is weak, the flue gas return flow cannot be guaranteed, and the emission parameters cannot be guaranteed

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