Analysis method for the influence of co-fired boiler operating parameter changes on the coal consumption of power generation units

Abstract

The invention discloses an analysis method for the influence of the change of operating parameters of a co-firing boiler on the coal consumption of power generation of a unit, and is mainly designed for the optimal operation of a pulverized coal and blast furnace gas co-firing boiler. The analysis method of the present invention includes obtaining the reference value of the controllable operating parameters of the boiler, the operating data of the unit, the combustion characteristic data of the mixed fuel, the heat loss data and the thermal efficiency data of the co-fired boiler; , the deviation of coal consumption for power generation caused by the deviation of the exhaust gas temperature from the reference value, the deviation of the coal consumption of the unit for power generation caused by the deviation of the exhaust gas oxygen content from the reference value, the deviation of the coal consumption of the unit for power generation caused by the deviation of the carbon monoxide content in the exhaust gas from the reference value, and the deviation of the carbon content of fly ash from the reference value The deviation of coal consumption for power generation of the unit caused by the value. The invention can obtain on-line the degree of adverse influence of the main controllable operating parameters of the pulverized coal and blast furnace gas co-firing boiler on the coal consumption of the unit for power generation, thereby realizing the energy-saving and optimized operation of the power plant.

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...

AI Technical Summary

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

Images