The evaporative crystallization system is a set of precise liquid-liquid separation device. Before the materials enter the main device, it is necessary to ensure the pre separation of large particles and materials that cannot enter the main device according to the process requirements, so as to ensure the process stability and ensure that the rotor and scraper in the main equipment will not be damaged. It is necessary to pre separate harmful substances in advance. Tuochi has independent research and development, design, manufacturing and service capabilities of filter and filtration system, which provides favorable support for the development of evaporative crystallization industrial system and ensures the accurate realization of process route.