Emission and drying kinetics of paper mill sludge during contact drying process

The emission and contact drying kinetics of the paper mill sludge (PMS) were studied through experiments carried out in a paddle dryer. To get a better understanding of its drying mechanism, a penetration model developed by Tsotsas and Schlünder (1986) was used to simulate the drying kinetics of the PMS. The result indicated that this kinetics could be divided into three phases: pasty, lumpy and granular phases, and could be successfully simulated by the penetration model as the related sludge parameters were integrated into the model. The emission rate curves of the volatile compounds (VCs) were interrelated to the drying rate curve of the PMS, especially for volatile fatty acids (VFAs) and ammonia in this study.

空心桨叶干燥机在印染污泥干化工艺中的应用实例

污泥的干化是解决污泥出路的关键,桨叶式污泥干化处理工艺可以做到污泥减量化、无害化、稳定化,为污泥的进一步资源化提供了更多的灵活性和可操作性。文章通过对广东某印染有限公司的印染污泥的空心桨叶干燥机干化工艺应用实例介绍,为工业污泥的干化提供参考。