Dual counterflow boiler for infinitely smooth heating system - has two internal counterflow circuits in parallel in the same direction and burns two circuit exhaust circulations

摘要

The return (a) on the top of the boiler extends over the whole length of the boiler. The flow in the lower third of the boiler is separated (b1,b2) from the common flow (b). Exhaust gas through the recirculation flow nozzle (1,m) is mixed through the burner tube and in the outer areas of the flash flame. USE/ADVANTAGE - The dual counterflow boiler is designed for low temperature working, and reduces the prodn. of NOx.