Blending method for mixed coal of boiler

Abstract

The invention discloses a blending method for mixed coal of a boiler. The method is characterized in that the coal quality is used as an optimization target, the blending method can be used for finding a scheme closest to a target coal quality from a complex single coal source; due to the fact that the components in the coal are more, the mixed coal quality obtained by blending cannot be completely the same as the target coal quality; the blending scheme is not completely the same as the target coal, but is closest to the target coal; and the proximity degree of the component in the mixed coaland the target coal can be independently adjusted by setting an expected error of a certain component. According to the scheme of taking the target coal as a blending optimization objective, the maximum output requirement of a generator set can be met in the market environment of which the coal quality is generally reduced and no stable coal sources exist, the situations that the boiler heating surface is overheated and a hearth is coked in large area are avoided, the burning rate of pulverized coal at an outlet of a hearth is relatively high, and emission of pollutants such as the nitrogen oxide content and the sulfur dioxide content meets the environmental protection requirements.

Description

technical field [0001] The invention relates to a coal blending method for a boiler, which belongs to the technical field of coal blending combustion in thermal power plant boilers. Background technique [0002] With the tight coal market, the coal used by power plant boilers is usually blended with different types of coal in a certain proportion. Coal blending can enable boilers to maintain coal power generation in an environment where coal quality generally declines and there is no stable coal source. The relative stability of main indicators such as heat, volatile matter and sulfur content ensures the safe operation of the boiler; blended coal combustion also reduces fuel costs and improves the market competitiveness of power generation companies; at the government management level, coal blended combustion optimizes coal resources Utilization has improved the utilization rate of inferior coal. The combustion characteristics of blended coal are not a simple superposition ...

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problem that the traditional blending scheme with coal purchase cost as the optimization target is not suitable for the current power production environment, the present invention proposes a coal blending method for boilers, which can target coal quality as the coal blending plan , to improve the utilization rate of coal fired by power plant boilers

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