I. Introduction
With the rapid development of my country's economy, the use of energy is increasing, and the use of electric energy is increasing day by day. According to statistics from the Ministry of Industry Development and Environment and Resources of the China Electricity Council, my country's total electricity consumption from January to October 2017 was 5,201.8 billion kWh, a year-on-year increase of 6.7%. According to statistics, my country is one of the countries with the most thermal power coal-fired units in the world, and coal consumption (thermal coal) in the power industry accounts for more than 50% of total coal consumption. Therefore, there are two urgent problems for thermal power generation: one is to improve the operating effieiency of the unit and reduce the coal consumption of the unit; the other is to effectively reduce the harmful gas emissions during the coal combustion process [1]–[6].