As a solid combustible, coal is known as black gold and industrial food. The depth and breadth of coal processing are developing rapidly, the output of coal has risen significantly, and the coal drying industry has also developed rapidly. A coal dryer is a special equipment for drying various kinds of coal. The coal dryer has a good drying effect and can dry the moisture in the coal with high efficiency and energy saving. This has huge economic benefits and protects the environment, and has been welcomed by many coal enterprise investors.