FILM-FORMING AGENT OF AN EVAPORATING APPARATUS

The invention relates to nuclear energy industry, in particular to evaporators used in radiochemical production, which are designed to evaporate highly active solutions, and more specifically to devices designed to create thin film in the heating chambers (evaporators), and can also be used in chemical, petrochemical and other industries.The film former contains a liner installed in the upper part of the heat exchange tube and attached to the spindle of the bellows assembly installed on the evaporator lid. The liner is provided with a tip made of a radiation-proof material that is not wettable by liquid being evaporated. The tip is made of two conjugate cones: the upper back cone and lower right cone, with the lower cone being provided with a cylindrical belt with protrusions on it, which are designed to center the conical tip on the inner surface of the heat exchange tube. A cap is mounted movably on the liner, with grooves being made on the lower end of the cap along the entire perimeter.The liner attached to the spindle of the bellows assembly is connected by fins with adjacent liners installed in heat exchange tubes.The technical result consists in remote control of the film thickness of the liquid flowing through the heat exchange tubes.