Stable combustion combustor based on pre-combustion chamber temperature control and operation method thereof

Abstract

The invention discloses a stable combustion combustor based on pre-combustion chamber temperature control and an operation method thereof. A primary air rotational flow device of the stable combustioncombustor is arranged at an inlet of a pre-combustion chamber, so that a wind-powder mixture generates strong rotational flow before entering the pre-combustion chamber to be combusted, and the low-load stable-combustion performance of the combustor is ensured. A direct-current center air duct is arranged at an inlet of the pre-combustion chamber, and the phenomena of coking, burning loss and thelike of the pre-combustion chamber under high loads can be avoided by adjusting the opening degree of direct-current center air. Secondary air with adjustable rotational flow intensity is arranged onthe outer side of a cavity of the pre-combustion chamber, mixing of the secondary air and air powder flow in the pre-combustion chamber is delayed, generation of nitric oxide is reduced, and meanwhile the low-load stable combustion performance and the coking and burning loss prevention performance of the combustor can be improved in an auxiliary mode by adjusting the rotational flow intensity ofthe secondary air. The deep peak regulation capacity of a coal-fired boiler can be effectively improved, and the coal quality adaptability of a deep peak regulation unit is broadened.

Description

technical field [0001] The invention belongs to the technical field of deep peak regulation of coal-fired power station boilers, and in particular relates to a stable combustion burner based on pre-combustion chamber temperature control and an operating method thereof. Background technique [0002] With the rapid development of wind power, photovoltaic and other renewable energy power generation in China, as well as changes in the characteristics of power consumption on the user side of electric energy, the demand for flexible power sources in the power grid system continues to increase, and the positioning of coal power in the power grid system is gradually shifting from electricity-type power to In order to improve the consumption of renewable energy and ensure the safe and stable operation of the power grid, coal power units will assume more of the peak-shaving function of the power grid system. With the gradual introduction of trading rules for the power auxiliary servic...

AI Technical Summary

Problems solved by technology

[0006] At present, most of the improvement of the stable combustion ability of the pre-chamber burner is achieved by means of enhanced combustion such as increasing the air-powder mixing temperature and enhancing high-temperature flue gas entrainment. When the load is on, the phenomenon of coking and burning at the nozzle is often caused by excessive heat load, which affects the safe operation of the boiler

And in response to changes in coal quality and load, there is a lack of effective combustion stability guarantee measures

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