【摘要】 煤气化、煤液化以及煤焦化过程所产生的废水成分复杂，含有较多的氨氮、酚类化合物等污染物。在化学工程师看来，废水只不过是一种放错了的资源，只要对废水进行合理的回收利用，就可以将资源回收利用。同时苯酚也是一种众所周知的化合物，在工业合成、医疗等领域都有许多应用，因此回收提取废水中酚类化合物具有重要的现实意义。本项目采用萃取+变压吸附分离+精馏的组合工艺来回收废水中的苯酚和邻苯二酚，选择正丁醚为萃取剂，并对工艺流程进行了模拟，实现了回收苯酚181.5 t,回收邻苯二酚91 t。本文对正丁醚回收塔、苯酚精馏塔的塔板数和回流比等参数进行了灵敏度分析，最终正丁醚回收塔的塔板数为25块，物质的量回流比为0.7,苯酚精馏塔的塔板数为15块，物质的量回流比为0.6,在第10块塔板进料。本文还对变压吸附装置进行了设计，力求回收更多的酚类化合物。本工艺对发展高效经济的含酚废水处理工艺回收废水中的酚类化合物有着经济的意义，且符合绿色化工和清洁生产的理念。更多还原

【Abstract】 Wastewater generated from coal gasification, coal liquefaction, and coal coking processes is complex in composition, with high levels of ammonia, nitrogen, phenolic compounds, and other pollutants. In the opinion of chemical engineers, wastewater is nothing more than a misplaced resource, which can be recycled if the wastewater is properly recycled. Meanwhile, phenol is also a well-known compound with many applications in industrial synthesis, medical treatment and other fields, so the recovery and extraction of phenolic compounds from wastewater is of great practical significance. In this project, the combined process of extraction + variable pressure adsorption separation + distillation was used to recover phenol and catechol from wastewater, n-butyl ether was selected as the extractant, and the process was simulated to achieve the annual recovery of 181.5 t of phenol and 91 t of catechol. In this paper, the parameters of n-butyl ether recovery tower and phenol distillation tower, such as the number of plates and reflux ratio, were analyzed for sensitivity, and the final number of plates of the n-butyl ether recovery tower was 25 with a molar reflux ratio of 0.7, and the number of plates of the phenol distillation tower was 15 with a molar reflux ratio of 0.6, which was fed at the 10 th plate. In this paper, a variable pressure adsorption unit was also designed to try to recover more phenolic compounds. This process is of economic significance for the development of an efficient and economical phenol-containing wastewater treatment process for the recovery of phenolic compounds in wastewater and is in line with the concept of green chemistry and cleaner production.更多还原