CAJ | 학술논문

针对鲁奇加压气化工艺产生的煤气化污水处理现有流程特点提出一种新的化工处理过程,并实现了工业化.分别介绍煤气化污水化工流程处理的新老过程.新流程中,采用酸水汽提塔同时脱除煤气化污水中的氨气和酸性气体,氨气脱除后的煤气化污水pH值由原先的9～11降低至7以下,有利于后续溶剂萃取脱酚.而萃取溶剂甲基异丁基甲酮(MIBK)相比二异丙醚(DIPE)对污水中单元酚和多元酚有更高的分配系数,MIBK的萃取应用将从污水中回收更多的酚类成分,从而在煤气化污水生化处理前COD能进一步降低.
침대로기가압기화공예산생적매기화오수처리현유류정특점제출일충신적화공처리과정,병실현료공업화.분별개소매기화오수화공류정처리적신로과정.신류정중,채용산수기제탑동시탈제매기화오수중적안기화산성기체,안기탈제후적매기화오수pH치유원선적9～11강저지7이하,유리우후속용제췌취탈분.이췌취용제갑기이정기갑동(MIBK)상비이이병미(DIPE)대오수중단원분화다원분유경고적분배계수,MIBK적췌취응용장종오수중회수경다적분류성분,종이재매기화오수생화처리전COD능진일보강저.
A novel chemical process is introduced for the treatment of coal-gasification wastewater produced from Lurqi gasification, and the process has been industrially realized. Ammonia and acidic gas in coal-gasification wastewater are removed through a sour water stripping tower in the new process, through which the pH value of the treated wastewater is decreased from 9-11 to 7, and hence it is beneficial to the subsequent solvent extraction for phenols. The distribution coefficients of M1BK to phenol and polyhydric phenols are greater than those of DIPE. The application of MIBK as extraction solvent would recover more phenolic substances from wastewater than DIPE. The COD value would be further reduced before the coal-gasification wastewater flowed into the biochemical treatment.