我国有相当数量的热电厂采用湿排灰,经过沉淀含水量一般为45～50％,经过真空过滤含水量一般达32～35％。目前许多水泥厂拟用粉煤灰作混合材料,粉煤灰烘干成为技术上的关键问题。经实践证明,普通回转烘干机不适用于烘干粉煤灰,因产量低,热耗高,质量差。有鉴于此,武汉建材学院设计试制了一种适用于烘干粉煤灰的旋浮烘干机,试验证明效果很好。于1982年12月通过了省级技术鉴定。 A considerable number of thermal power plants in China use wet ash. After precipitation, the water content is generally 45 to 50%. After vacuum filtration, the water content generally reaches 32 to 35%. At present, many cement plants plan to use fly ash as a mixed material. Drying of fly ash has become a key technical problem. It has been proved by practice that ordinary rotary dryers are not suitable for drying fly ash because of low output, high heat consumption and poor quality. In view of this, the Wuhan Institute of Building Materials has designed a prototype spin-drying dryer suitable for drying fly ash. The test proved to be very effective. In December 1982 passed the provincial technical appraisal.