Coal blending combustion method based on multi-objective optimization

Abstract

The invention discloses a coal blending combustion method based on multi-objective optimization, and the method comprises the following steps: S1, calculating coal quality parameters through a linear weighting method according to the industrial analysis result of a coal sample, and calculating the coal quality parameters by taking a safety limit and an environmental protection limit as constraint conditions; establishing a coal blending mathematical model based on multi-objective optimization by taking safety, economy and environmental protection as optimization objectives; s2, optimally calculating the optimal coal blending proportion according to the multi-objective optimization-based coal blending mathematical model established in the step S1; and S3, implementing automatic coal blending combustion. Under the multi-target requirements of safety, economy and environmental protection, the actual load of a unit, the combustion working condition of a boiler and the coal storage condition of a coal yard are integrated, the blending proportion of coal in-furnace blending is optimally calculated, the proportion of coal types controlled by all coal feeders is automatically adjusted according to the blending proportion, and automatic coal blending and blending combustion are achieved.

Description

technical field [0001] The invention relates to the technical field of coal-fired power generation, in particular to a coal blending and blending combustion method based on multi-objective optimization. Background technique [0002] In recent years, as the price of coal continues to rise and the environmental protection standards for pollution emissions continue to increase, the operating costs of power plants continue to increase. For the purpose of reducing power generation costs and improving unit economy, most power plants use relatively low-priced low-quality coal for coal blending and combustion. However, burning non-design coal may cause a series of problems such as poor combustion of the boiler, lower thermal efficiency of the boiler, slagging of the furnace, and excessive pollution emissions. [0003] At present, when coal-fired power plants blend and burn coal, they mix and burn two or more different types of coal in a certain proportion, so that the coal quality ...

AI Technical Summary

Problems solved by technology

The traditional method of finding the optimal coal blending ratio is based on the constraints of boiler combustion characteristics and coal quality parameters, and the optimization calculation is carried out with the goal of the lowest coal price. The safety and environmental protection of the scheme lead to the current coal blending scheme being too rough and unable to guarantee the applicability of coal blending and burning

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