湿法脱硫废水化学处理工程实践存在问题探讨  

Suggestions on the ways to improve the current problems in chemicaI treatment of the sewage from wet flue gas desulphurization

作　　者：林丽[1] 张文阳[1] 方勇 秦文娟[1] 唐仙[1] 王小朋 

机构地区：[1]西南交通大学环境科学与工程学院,成都610031 [2]中电投远达环保工程有限公司,重庆400060 [3]成都锐思环保技术责任有限责任公司,成都610041

出　　处：《安全与环境学报》2009年第1期45-47,共3页Journal of Safety and Environment

摘　　要：分析湿法脱硫废水化学处理工艺在工程实际应用中存在的问题,并提出具体优化处理措施。针对污泥和Ca(OH)_2输送管道容易堵塞,实际运行中不需污泥回流出水仍能达标以及加药量与设计耗药量相差悬殊等疑难问题,提出相应解决措施。优化管路设计以减少管道堵塞;以废水中固有的高浓度悬浮物(CaSO_4等)为晶核,促进过饱和石膏溶液结晶,无需污泥回流;改进相关絮凝沉淀药剂的投加工艺,减少药剂使用量,节约处理成本。本研究为湿法脱硫废水化学处理工艺的改进提供了支持,有利于处理系统的操作和维护。This paper has done a careful investigation and analysis over the current problems to be overcome in engineering practice and put forward a few suggestions on the ways to improve them. As we know, the technology on chemical treatment of the sewage from wet flue gas desulphurization has now become a mature technology both at home and abroad. However, there still exist some problems to be solved. Starting with this actual need, this paper has done a careful investigation and analysis over such problems, as in the engineering practice and the related data. And based on its research, the paper has proposed some available measures for further improvement. Since the processing system is more conducive to the production maintenance, this paper specifically focuses its attention on the following three problems： （1） It is easy to plug the sludge and Ca（OH）2 into the pipeline; （2） It is necessary to keep the effluent water pollutants in conformity to the state discharge standard when the returning sludge can be stopped in the actual operation; （3） The consumption of drugs in engineering praxis should not be over as is designed. To resolve these problems, we have also brought about three measures ： （ 1 ） The pipeline plug has to be reduced by the optimum design; （2） High suspension substances （CaSO4 etc）, should be used as the host crystal to promote the crystallization of supersaturated gypsum solution so as for the sludge return to be avoided; （3） Flocculating-precipitate drugs and treatment cost should be reduced by improving the feed technology. Thus, great hope can be placed so as to provide certain supplementary measures to heighten the wet FGD sewage chemical treatment greatly.

关 键 词：水污染防治工程 脱硫废水 管道堵塞 污泥回流 药品消耗 

分 类 号：X703.1[环境科学与工程—环境工程]