A Method for Calculating the Ability of Coal Pulverizer to Combust Lignite

Abstract

The invention provides a method of calculating mix-burning capacity of lignite of a coal mill and relates to the technical field of power plant lignite utilization. The method includes the steps that related parameters of the coal mill, a generator set, a boiler and a desulfurization system are obtained; the first maximum mix-burning quantity of the lignite generated when the boiler is fully loaded, the second maximum mix-burning quantity of the lignite generated when the coal mill actually operates, the third maximum mix-burning quantity of the lignite generated when the mixed coal sulfur content of the mixed coal is the largest borne value of the desulfurization system and the fourth maximum mix-burning quantity of the lignite generated when the sluggish reaction time of the generator set in the variable load state reaches a preset threshold value are calculated according to the related parameters respectively; the minimum value among the first maximum mix-burning quantity, the second maximum mix-burning quantity, the third maximum mix-burning quantity and the fourth maximum mix-burning quantity is determined as the maximum mix-burning quantity of the mix-burned lignite of the coal mill. By means of the method, the problems that adverse influences are brought to operation of the boiler and set equipment due to excessive mix-burning of the lignite, and in the prior art, no method of determining the mix-burning capacity of the lignite of a coal mill exists are solved.

Description

Technical field [0001] The invention relates to the technical field of the utilization of lignite in power plants, in particular to a method for calculating the ability of a coal mill to blend lignite. Background technique [0002] In recent years, with the continuous reduction of coal resources, the price of coal is also rising, which makes the power generation cost of power plants increase. [0003] Lignite, also known as firewood coal, is the mineral coal with the lowest degree of coalification. It is also a brown-black, matt low-grade coal between peat and bituminous coal. Lignite has strong chemical reactivity and is easily weathered in the air. It causes serious air pollution during combustion. Due to the over-mining of high-quality coal, the current storage capacity of lignite is relatively large. At present, in order to alleviate the rapid and massive consumption of coal resources, power plants and others generally burn low-cost lignite in the burning coal, which has becom...

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Problems solved by technology

[0005] Embodiments of the present invention provide a method for calculating the ability of coal pulverizers to burn lignite, so as to solve the problem that transitional burning of lignite will have adverse effects on boiler operation and unit equipment, and the prior art does not determine the ability of coal pulverizers to burn lignite the problem of the method

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