Traditional solid-liquid separation technology is divided into mechanical filtration separation and thermal drying separation. There is a certain separation limit for mechanical filtration and separation. If it exceeds the limit, it must be separated by mechanical filtration and then subjected to thermal drying and separation. The thermal drying separation is a high-energy-consuming operation with high investment and operating costs. In contrast, the hot-press filtration drying dehydration technology is a crossover technology that combines mechanical filtration with thermal drying. The entire process of forming a continuous filter cake and hot-pressing separation on a single drying filter press can be omitted. The thermal drying operation separates the suspension into clarified water and dry powdered materials at one time, which has the technical advantages of energy saving, high efficiency and environmental protection.
Taking high-grade pearlescent pigments exported from Langfang Ouke Fine Chemicals Co., Ltd. as an example, the solid-liquid separation operation of finished products was originally vacuum filtered for 4 hours. The water content of filter cake was 40%, and then it was dried in the drying room for 11 hours to reach the finished product requirements. . The use of hot-pressure filter drying dehydration technology, only takes 40 minutes, filter cake moisture 15%, and then into the drying room to dry 1 hour to reach the finished product requirements, production efficiency increased by more than 60%.