It is required to be suitable for the design and manufacturing technology of solid-liquid separation equipment in chemical, biological, pharmaceutical (including Chinese patent medicine) industries. For example, it can be widely used in urban sewage treatment, metallurgy, papermaking and other industries. The equipment requires simple structure, stable performance, easy maintenance and low operation cost. Energy saving, noise and filtered and separated liquid emissions should be in line with the current national policy. Enterprises can process the medium parameters according to the needs provided by customers, and set up technical support units to guide us to design automobile muffler factory for specific equipment. This technology and equipment is the key technology to improve the level of grain drying. According to the new 500 drying machines in China every year, 60% of them need to be equipped with drying equipment. The output value can be increased by 9 million yuan per year, and the control of drying equipment in China can reach the international advanced level. The moisture content of feed and discharge is detected on-line, and the speed of grain output of dryer is automatically controlled, so that the moisture content of discharge reaches the specified target moisture range.