Coal-fired blending method in a thermal power plant

Abstract

The invention discloses a coal blending combustion method of a coal-fired power plant. The coal blending combustion method of the coal-fired power plant comprises the following steps: A, weighing coal after coal reaches a coal yard, and storing the quantity and coal mine information of the coal into a database; B, sampling the coal and detecting, and thus obtaining the detection result of the coal; C, categorizing the coal according to the detection result, stacking the coal to the designated areas of the coal yard according to the categories, and storing the quantity, heat value and sulfur content of the cola in each designated area into the database; D, according to a blending combustion scheme pre-stored in the database, taking the different categories of coal with required quantity from the designated areas to fine down, and then putting into the boiler of the coal-fired power plant for combustion. According to the coal blending combustion method of the coal-fired power plant provided by the invention, tightened inspection on coal quality is achieved, and thus coal is stacked according to categories, coal with different quantity and quality can be mixed according to different blending combustion schemes; and therefore, the best coal combustion efficiency can be achieved efficiently.

Description

technical field [0001] The invention relates to a method for controlling the coal combustion efficiency of a thermal power plant, in particular to a method for blending coal combustion in a thermal power plant. Background technique [0002] In large-scale thermal power plants that use coal as the main fuel, there are certain requirements for coal quality and power generation efficiency. For example, boilers in thermal power plants need to select the corresponding design coal type. When the coal quality exceeds the set adaptation range, it will have a great impact on the safety and economy of the boiler, mainly reflected in: (1) The output of the boiler decreases (2) Boiler heat loss increases and efficiency decreases; (3) Combustion is unstable, even flameout, and the degree of burnout is poor; (4) Boiler furnace slagging, heating surface overheating, corrosion, wear and increase air pollution; (5) ) Fuel costs and power generation costs increase. In actual work, problems ...

Images