Flue gas collector main on regeneratively heated coke-ovens

Abstract From the Canadian patent

The invention relates to a flue gas collector main which extends along a battery of coke ovens and to which regenerators are connected via changeover valves. The bottom junction pipes of the changeover valves lead into the crown apertures of the main serving for the flue gas supply. In accordance with the invention, the main is constructed as a reinforced concrete body of substantially rectangular vertical cross-section and, the base, side walls and crown, as well as the walls of the crown apertures provided for the introduction of the flue gases are, provided with a thermal insulation of a thickness such that and of a material such that the reinforced concrete body assumes only negligible …