氯化法钛白氧化反应器结疤机理和除疤方法研究

Study on Scar-formation Mechanism and Scar Removal for Oxidation Reactor of TiO_2 by Chlorination Process

氧化反应工艺是氯化法钛白的关键技术,而结疤是制约氧化反应器长周期运行的瓶颈,掌握结疤产生的症结是延长氧化反应器运行周期的基础和关键。以气相氧化法制备金红石型TiO_2的氧化反应器生产现场疤料检测结果为基础,通过开展仿真计算和结疤模拟试验,对氧化反应器的结疤机理进行了分析,并结合国内现行大型氧化反应器的设计结构,提出了氧化反应器防疤优化措施。

The oxidation reaction is the key process of titanium dioxide preparation by chlorination process,while scarring is a bottleneck restricting long-term operation of oxidation reactor.Therefore,grasping the crux of scar formation is the foundation and key to extend the operation period of oxidation reactor.Accordingly,on the basis of detection results of scarring materials of rutile TiO2 prepared in oxidation reactor by gas phase oxidation method in the production site,this thesis analyzed the reasons for scarring in oxidation reactor through simulation calculations and scarring simulation tests.And this work also proposed the optimization measures for scarring prevention in oxidation reactor,combining with the design structure of existing large-scale oxidation reactor in China.