安全壳过滤排放系统中固体粉末气溶胶发生装置设计与性能研究

Design of a new aerosol generator for filtered containment venting system and its performance

在进行安全壳过滤排放系统对气溶胶过滤性能的测试实验时,针对现有固体粉末气溶胶发生装置不能用于高压配送系统的缺点,本文设计了一种能够应用于高压系统、黏性粉末配送的双筒多级流化循环型气溶胶发生装置,它不仅能够配送满足要求的气溶胶,还实现了高压在线连续供粉功能。经过实验验证,气溶胶配送量的相对误差在15%以内,满足研究要求。

In the aerosol removal efficiency test of filtered containment venting system, the aerosol generator is used to produce the aerosols delivered to the main pipe of the filtered containment venting system under a system pressure of 1 to 6.5 MPa. The main ingredient of the aerosols is barium sulphate or titanium dioxide, with a mass median diameter of 1 micron and a geometric standard size distribution of 1~2; the concentration of the used aerosols should be held within a range of 50~900 mg/m3. Since existing generators are usually unable to generate and disperse the cohesive powders and unable to work in such a high pressure, a new kind of aerosol generator is designed,which can not only meet the requirements for the used aerosols but also realize the function of continuously providing powders in high pressure situation. Through experiments, it is shown that the relative error of the value of aerosols generated and transmitted by the new generator is less than 15%, and it can satisfy the requirement of the research.