To meet the requirement of environmental protection

thermal power plants have gradually realized completely closed transformation of coal yard

which puts forward new requirements for high-efficiency coal storage and blending of coal in coal yard of large thermal power units. On the basis of analyzing relevant parameters and technologies of coal blending and burning

this paper discusses the technology of gas film closed coal yard in detail

puts forward the detailed blending scheme of gas film closed coal yard

and introduces the blending and burning scheme and design results in the form of gas film structure combined with the example of a coal storage yard gas film closed reconstruction project in a thermal power plant. The results show that

the technology of gas film closed coal yard and proper coal blending can fully realize flexible and diverse blending methods of the power plant

meet the requirements of safety

environmental protection and flexible coal blending

and maintain the economic indicators of original fuel and combustion.