Advanced coal blending combustion system and coal blending combustion method for coal-fired generator set

Abstract

The invention discloses a coal-fired generator set advanced coal blending combustion system and method, the coal blending combustion system comprises an incoming coal type identification module and a coal blending combustion module, the incoming coal type identification module is used for identifying incoming coal types of different mill sets, and the coal blending combustion module adjusts blending combustion proportions of different incoming coal types under constraint conditions; the constraint conditions comprise the upper limit and the lower limit of a load interval, the upper limit of a blending combustion proportion of anthracite in a mill, the lower limit of the blending combustion proportion of high-calorific-value coal in the mill, an original coal consumption set value and an inlet SO2 set value. According to the coal blending combustion method, the accumulated mean value of the original coal consumption of the unit within the preset time t is compared with the set value of the original coal consumption, the accumulated mean value of the SO2 at the inlet within the preset time t is compared with the set value of the SO2 at the inlet, and then the proportion of different coal types is adjusted. According to the method, the unit load characteristics, the fuel unit price and the unit performance are taken as boundary conditions, the optimal coal type blending combustion suggestion is given within the range of supplied coal types, and the power generation cost of the coal-fired unit is effectively reduced through refined coal blending combustion.

Description

technical field [0001] The invention relates to the field of thermal energy and power engineering, in particular to an advanced coal blending and blending system for a coal-fired generating set, and also relates to an advanced coal blending and blending method for a coal-fired generating set. Background technique [0002] At present, the supply pressure of thermal coal is high. Under the background of coal price marketization, coal price is gradually rising, which greatly reduces the profit margin of coal-fired power generation enterprises. In order to reduce the cost of electricity and improve efficiency, relevant power generation companies are forced or actively purchase non-design coal types for blending. However, unscientific coal blending will cause the boiler and auxiliary equipment to be unsuitable for coal combustion. In actual operation, it will not only lead to reduced combustion stability of the boiler, increased coking and ash accumulation in the furnace, and poo...

AI Technical Summary

Problems solved by technology

However, unscientific coal blending and blending will cause the boiler and auxiliary equipment to be incompatible with coal combustion. In actual operation, it will not only reduce the combustion stability of the boiler, increase coking and ash accumulation in the furnace, and poor load carrying capacity. These problems will also have a negative impact on the normal operation of desulfurization equipment and environmental protection emission indicators, and seriously affect the safety of unit operation

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