Method for analyzing impact of changes of multifuel fired boiler operating parameters on unit power generation coal consumption

Abstract

The invention discloses a method for analyzing the impact of changes of multifuel fired boiler operating parameters on unit power generation coal consumption. The method is mainly designed for realizing the optimized operation of pulverized coal and blast furnace gas mixture fired boiler, and comprises the following steps: respectively obtaining a reference value of controllable boiler operating parameters, unit operating data, combustion characteristic data of mixed fuel, thermal loss data and thermal efficiency data of a multifuel fired boiler; calculating to obtain a standard unit power generation coal consumption rate, unit power generation coal consumption deviation caused by exhaust gas temperature deviating from the reference value, unit power generation coal consumption deviation caused by oxygen content in exhaust gas deviating from the reference value, unit power generation coal consumption deviation caused by carbon monoxide content in exhaust gas deviating from the reference value, and unit power generation coal consumption deviation caused by carbon content in fly ash deviating from the reference value. According to the invention, the adverse impact of main controllable operating parameters of pulverized coal and blast furnace gas mixture fired boiler on the unit power generation coal consumption can be found, so that the energy-saving and optimized operation of power plants can be realized.

Description

technical field [0001] The invention relates to the field of boilers in thermal energy engineering, in particular to an analysis method for analyzing the influence of main controllable operating parameter changes of pulverized coal and blast furnace gas co-firing boilers on the coal consumption of generating units for power generation. Background technique [0002] Iron and steel enterprises produce a large amount of blast furnace gas during the smelting process. Due to the characteristics of low calorific value, high nitrogen content, and poor combustion stability of blast furnace gas, many iron and steel plants currently do not fully utilize blast furnace gas. The gas is released directly, resulting in a waste of energy. Therefore, how to make good use of the by-product blast furnace gas resources in the iron and steel production process is a common concern of relevant technical personnel. [0003] In recent years, pulverized coal and blast furnace gas co-fired boilers ha...

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Problems solved by technology

[0005] At present, there is no report on the influence of the controllable operating parameters of pulverized coal and blast furnace gas co-fired boilers on the coal consumption of power generation units, and similar studies are basically carried out on traditional pulverized coal boilers

However, there is a big difference in the combustion model between pulverized coal and blast furnace gas co-firing boilers and conventional pulverized coal boilers (especially in the correlation between flue gas volume and excess air coefficient), which makes the traditional coal consumption deviation analysis method unable Applied to pulverized coal and blast furnace gas co-firing boiler

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