Beer lees is the main raw materials of the brewery.The remaining solid matter of malt, rice and hops through saccharification, gelatinization technology to filter or filter press. Its main component is wheat shell, wheat germ, rice germ and endosperm, which contains a large number of undecomposed and recalcitrant substance polymer nutrients such as crude protein, crude fiber and crude fat nutrien,Most by-product of beer plant is wet beer lessBut it is easily to go to bad, so it tend to pollute the environment when it is transported and stored.

In recent years, many breweries began to deep-processing the by-products of beer, so it not only can reduce environmental pollution, but also can increase economic efficiency, Zhengzhou Dingli developed brewer's grain rotary dryer can process the moisture content 85% to 10% ,even less than 10%,through dehydration, drying, and other ways. At present, this sets of equipment has been used in many domestic beer companies, feed processing enterprises. Due to the excellent performance, the brewer's grains rotary dryer get a good welcome from global customers.