废液处理新工艺超临界水氧化(SCWO)评述

Assessment of Supercritical Water Oxidation(SCWO) in Waste Water Treatment

超临界水氧化是一项对有机废液焚烧处理最有潜力的替代技术,在过去的20多年里,这项技术引起了广泛的关注。然而,作为一项管端技术,超临界水氧化仍存在许多不足,这些不足阻碍了它的工业应用。除了反应器腐蚀和盐析导致的技术问题外,超临界水氧化经常被认为是一项处理所有废液的"通用"技术,然而也是无法实现的"通用"技术。本文介绍了作为管端处理技术的超临界水氧化技术存在的问题,讨论了可能的解决办法,介绍了不同反应器的概念,提出了在超临界水氧化领域里开展进一步研究和发展新工艺流程的建议。此外,评价了超临界水氧化技术涉及到的自身能源供应问题。

The process of supercritical water oxidation （SCW0） is a promising alternative to the incineration of organic waste liquors, which has drawn more attention during the last two decades. However, as an end-of-pipe technology, SCWO still has some disadvantages that hindered its industrial application. Actually, beside the technical problems resulted from reactor corrosion and salting out, SCWO is often considered as a ＂general＂ technology for all kinds of waste liquor, while the one that is impossible to realize. In this paper, the existing problems of SCWO as an end-of-pipe technology are introduced; possible solutions are discussed; concepts of different reactors are introduced; and a suggestion for future research and development of novel process in the SCWO field is proposed. Additionally, possible problem of energy supply for the SCWO process is discussed.