Water distillation is proved to be an effective method for the recovery of tritium from nuclear power plant drainage. In addition to the geometry and material, the surface wettability of the internals also affects the mass transfer performance of the packings. In this paper, we prepared a superhydrophilic coating on the surface of copper packings by a simple method, to increase the intensity of gas-liquid interface, and thus intensifying the heterogeneous mass transfer process. Scanning electron microscopy, atomic force microscopy, X-ray diffraction and X-ray photoelectron spectroscopy were employed to study the physical and chemical condition changes of the packings surface. Measured by ultraviolet fluorescence imaging technology, the wetted area of the copper wire mesh corrugated packing increased by 58.0 % ∼ 91.2 %. The mass transfer performance for separating H₂O-HTO mixture with tritium activity of 12.9 MBq/kg is conducted in the total reflux mode distillation column. With varied measured conditions, the height equivalent of theoretical plate (HETP) drops from 3.5 ∼ 5.8 cm to 1.9 ∼ 2.4 cm after the packing surface modification, which indicates that the mass transfer performance has been sufficiently improved.

水蒸馏被证明是从核电站排水中回收tri的有效方法。除了几何形状和材料外，内部零件的表面可湿性还影响填料的传质性能。在本文中，我们通过一种简单的方法在铜填料的表面上制备了超亲水涂层，以增加气液界面的强度，从而加强了异质传质过程。利用扫描电子显微镜，原子力显微镜，X射线衍射和X射线光电子能谱研究填料表面的物理和化学条件变化。用紫外荧光成像技术测得，铜丝网波纹填料的湿润面积增加了58.0％〜91.2％。在全回流模式蒸馏塔中进行的activity活度为12.9 MBq / kg的₂ O-HTO混合物。在变化的测量条件下，填料表面改性后，理论塔板的高度当量（HETP）从3.5〜5.8 cm下降到1.9〜2.4 cm，这表明传质性能得到了充分改善。