A Study on Dechlorinate of MSWI Bottom Ash by Reagent-Assisted Washing

• Main Authors: Jia-Kai Chan, 詹家凱
• Other Authors: 章裕民
• Format: Others
• Language: zh-TW
• Published: 2014
• Online Access: http://ndltd.ncl.edu.tw/handle/pavq4p

碩士 === 國立臺北科技大學 === 環境規劃與管理研究所 === 102 === Domestic incinerator bottom ash recycling since 2003 to promote, in recent years, the domestic provisions for bottom ash recycling and reuse are increasingly stringent, bottom ash recycling based on different quality standards can be divided into three types, but most of the domestic processing vendor only conform to the provisions of the second type of re-use, resulting in bottom ash recycling purposes limited to provenance bottlenecks, Which, in order to reach the first type provides, One of the biggest problems facing the still required at the end of the water-soluble chloride content of the bottom ash, the study expected by way of reducing the washing of water soluble chloride content of bottom ash, reaching dechlorination of Objective, in order to enhance the level of re-use or re-utilization, and cost-effectiveness of the real plant be considered. In the study, liquid-solid ratio, residence time, and concentration of added acid lotion as a test of the three operating conditions, the study found the aforementioned operating parameters to improve the water-soluble chloride ions with a positive correlation between the reduction efficiency. According to the test results of the analysis showed that each wash tank using different operating parameters, Its best operating conditions for the retention time of 30min first slot, liquid-solid ratio = 3, add the acid concentration is equivalent to the acid pH =2.3, the second groove to Single residence time 30min , liquid-solid ratio = 3, add the acid concentration is equivalent to the acid pH = 2.9, the third slot to Single residence time 10min, liquid-solid ratio = 1, add the acid concentration is equivalent to the acid pH =2.3, the fourth slot to Single residence time 30min, liquid-solid ratio = 2, add the acid concentration is equivalent to the acid pH = 2.9, its water-soluble chloride was reduced rate of 98.74%; Another research results to practical engineering planning, such as the use of different operating conditions, costs about 489 dollar/ ton.