神华煤直接液化示范工程废水处理工艺分析

Technological process and characteristics of water treatment for Shenhua coal direct liquefaction demonstration project

神华煤直接液化示范工程中来自煤液化、加氢稳定、加氢改质和硫磺回收等装置排出的含硫、含酚等高浓度污水以及循环水场排出的含盐污水,由于废水排放量大、浓度高,国内外没有类似的处理经验可借鉴。根据污水排水的水质差异和废水回用的要求,增加了废水处理的难度。详细介绍了煤直接液化示范工程废水处理工艺流程与特点,并通过监测结果表明,煤直接液化产生的废水达到了循环冷却补充水的水质标准,充分体现了废水再生利用的原则。

There are some particular process produce waste water on Shenhuo coal direct liquification demonstration project, involving coal liquification,coal hydrogenation for stability, coal hydrogenation for improving quality, sulfur recovery and the like. The waster water contains higher concentration of sulfur, phenol and salt. The amount of waste water is large and the concentration is high. There is no mature experience for reference at home and abroad. The quality of waste water varies greatly and recycling standards have been improved a lot which make it difficult to treat sewage. Introduce in detail the technological process and characteristics of sewage treatment. The monitoring results show that the quality of sewage produced by coal direct liquification conforms to quality standards of circulating cooling make-up water, the process represents the sewage reutilization principle.