Heat exchanger for cooling slag-containing gases from coal gasification

Abstract From the Canadian patent

A tube bundle heat exchanger having an additional tube bottom with insertion tubes arranged in the inlet chamber upon the inlet side of the hot gases for the tubes located between the tube bottoms and the tube bundle. The additional tube bottom is arranged in such a way that both tube bottoms in the inlet chamber define another inlet chamber for colder slag-free gases, which inlet chamber is accessible through an inlet in the shell of the tube bundle heat exchanger. The insertion tubes project far into but not to the end of, the tubes of the tube bundle. The insertion tubes with the, outer tubes, form relatively narrow annular spaces suitable for generating high discharge speed. Four …