A volumetric heat exchanger is mainly composed of a body, a steam coil assembly, a steam inlet and outlet, and a hot and cold water inlet and outlet. In order to prevent the surface of the body from being corroded, a layer of anticorrosive alloy is sprayed on the surface, and The alloy layer is painted with a paint layer, and the original tube box is eliminated.
The steam coil is directly connected through the flange, so that the utility model has the advantages of simple and reasonable structure, long service life, good heat exchange effect, and energy saving.