精对苯二甲酸污泥废料的工业化处理

Industrialization of treating purified terephthalic acid waste mud

简要介绍了精对苯二甲酸(PTA)生产过程中,外排至污水厂活性污泥处理池中形成的污泥废料的性状。根据 PTA 在酸性条件下易析出而其中所含杂质在高温下易于溶解的原理,采用常规的反应、过滤分离、干燥、母液回收等工序。着重从酸液配方、工艺条件、设备选型及操作原理和操作方法上,对工业化处理精对苯二甲酸污泥废料的经济效益进行了分析和评估。指出装置目前存在的主要问题是产品加工深度不够,因而没有实现规模效益,应按照一体化的发展方向进一步改进和完善。

The properties of purified terephthalic acid(PTA)waste mud in the process of PTA sewage tank were intro- duced briefly.An ordinary process was used,including reaction,filtration,drying and recycling solution and so on,as PTA is easy to separate out in acidiferous conditons while the impurity easy to dissolve at high temperature.The economic returns on treating PTA waste mud were analyzed and assessed.The problem that lay is short of depth in processing,and the integration is the way towards improvement.