Ca(OH)_(2)和Mg(OH)_(2)制备废TBP/OK悬浮液性能对比研究  

Comparative Study on the Performance of Ca(OH)_(2) and Mg(OH)_(2) Spent TBP/OK Suspensions

作　　者：王珂 张敬辉 刘铁军 李明富 杜佳辉 Wang Ke;Zhang Jinghui;Liu Tiejun;Li mingfu;Du Jiahui(China National Nuclear Power Engineering Corporation,Beijing 100840,China;Nuclear China Nuclear Fuel Reprocessing Engineering and Technology Research Center,Beijing 100840,China)

机构地区：[1]中国核电工程有限公司,北京100840 [2]核中核燃料后处理工程技术研究中心,北京100840

出　　处：《广东化工》2024年第12期7-10,共4页Guangdong Chemical Industry

摘　　要：直接焚烧核燃料后处理过程中产生的磷酸三丁酯(TBP)和煤油(OK)有机废液会产生磷酸,会对设备造成一定程度的腐蚀,因此在采用热解焚烧工艺处理该废液时,需掺入合适比例的中和剂和表面活性剂等添加剂,将废液配制成均匀稳定的悬浮液。中和剂在热解过程中可以固定P2O5,避免磷酸生成后对设备的腐蚀。本文通过不同单因素实验研究以Ca(OH)_(2)和Mg(OH)_(2)为中和剂对配制成的TBP/OK悬浮液性能的影响,为后处理厂热解焚烧系统提供新的悬浮液配方思路。试验结果显示:当TBP含量为30%和60%时,Mg(OH)_(2)在相同TBP含量下配制成的悬浮液的最终表面黏度远大于Ca(OH)_(2),Mg(OH)_(2)和Ca(OH)_(2)在30%TBP时的最终表面黏度分别为90.36 m Pa·s和43.42 mPa·s,在60%TBP时的最终表面黏度分别为95.24 m Pa·s和75.09 m Pa·s,同时Mg(OH)_(2)的乳化速度明显优于Ca(OH)_(2),并具有更好的流动性。以Mg(OH)_(2)为中和剂的悬浮液在不同核素和DBP含量下整体稳定性更好。Direct incineration of nuclear fuel reprocessing process generated in the organic waste stream of tributyl phosphate(TBP)and kerosene(OK)will generate phosphoric acid,which will cause a certain degree of corrosion of the equipment,so in the use of pyrolysis incineration process to deal with the waste stream,need to be blended with a suitable proportion of neutralizing agent and surfactants and other additives,the waste stream is formulated into a uniform and stable suspension.The neutralizer can fix P2O5 in the pyrolysis process to avoid the corrosion of the equipment after the generation of phosphoric acid.In this paper,the influence of Ca(OH)_(2) and Mg(OH)_(2) as neutralizers on the performance of TBP/OK suspension was investigated through different single-factor tests to provide a new idea of suspension formulation for pyrolysis incineration system of reprocessing plant.The experimental results showed that the final surface viscosity of the suspensions formulated with Mg(OH)_(2) at the same TBP content was much higher than that of Ca(OH)_(2) when the TBP content was 30%and 60%,and the final surface viscosities of Mg(OH)_(2) and Ca(OH)_(2) at 30%TBP and 60%TBP were 90.36 mPa·s and 43.42 mPa·s,respectively.The surface viscosities were 95.24 mPa·s and 75.09 mPa·s at 30%TBP,and at 60%TBP,respectively,while the emulsification rate of Mg(OH)_(2) was significantly better than that of Ca(OH)_(2),and it possessed better fluidity.The overall stability of the suspension with Mg(OH)_(2) as the neutralizer was better at different nuclide and DBP contents.

关 键 词：TBP OK 悬浮液 Mg(OH)_(2) 

分 类 号：TQ[化学工程]