Boiler

Abstract From the Canadian patent

BOILER, Abstract of the Disclosure, The fire box unit inserted into a water casing of a boiler includes a tubular cast iron body fluid-tightly mounted in the apertures of the end walls of the steel sheet casing. The cast iron body is shaped to converge frusto-conically from its inlet to its outlet end and has a plurality of radially inwardly extending webs. A combustion chamber shell is mounted in the inlet end of the cast iron body and has a fuel burner inlet for burning a fuel in the chamber defined by the shell. A closure wall opposite the fuel burner inlet deflects the combustion gases of the burnt fuel towards the fuel burner inlet where the deflected gases are received in a gas guide …