纺织印染废水活性污泥干燥器设计计算探讨

摘要

The use of sludge from wastewater bio-treatment system is among the hot topics in scientist's list over the world. Bio-sludge is a fuel theoretically, but the heat from its combustion is not enough to evaporate water within the dewatered sludge. So available waste heat for drying of dewatered sludge is the key for sludge combustion economically. The drying of dewatered sludge from bio-treatment system of effluent of dyeing house by vent gas from a power plant was discussed in this paper, and the discussion included drying curve, drying rate, the drying capacuy of fluidized bed dryer, drying time, settlement velocity (or critical space velocity), diameter of the dryer and mass of wet sludge in equipment.%污泥作为再生资源加以有效利用是世界各国共同的课题.理论研究表明,脱水污泥含有一定量的有机物质,可以用作燃料.然而由于脱水泥饼含水率过高,污泥燃烧产生的热能不足于抵消水分蒸发所需的热能.因此,寻找可以利用的废热源来干燥脱水污泥成为污泥有效利用的重要一环.本文为电厂烟道气用于干燥纺织印染活性污泥的案例,文中结合其他作者的研究成果,就污泥干燥曲线、污泥干燥速率、流化床干燥污泥设备的处理能力、干燥时间和沉降速度(临界空塔速度)及塔径、塔内湿污泥存量进行了讨论.