Abstract: A heat exchanger constructive arrangement including a quadrangular based vertical vessel with inlet and output ducts and removable lid having heat exchange elements supported by parallel plates and vertically arranged in the form of a comb that interleave with existing baffles in the container, forming a chicane which forces the fluid to be heated to maintain contact with the entire surface of heat exchange.

Abstract: Large surface heat exchanger element composed of two metal plates provided with half spheroidal cavities, juxtaposed and united as to conform a sealed space in such way that the so conformed space provides resistance to internal or external pressure similar to a set of interconnected spherical wessels.