Full welding plate heat exchanger is a set of column tube heat exchanger resistance to high temperature and high pressure and removable plate heat transfer efficiency in one, its compact structure design has light quality,High heat transfer coefficient, small resistance, not easy scaling, adaptability and other advantages.In addition, fully welded plate heat exchanger is a kind of wide flow channel plate heat exchanger, it is suitable for small temperature difference, large flow process requirements, and adapt to the fluid with particulate floating body and high viscosity.