Process for minimising waste gas temperatures in chimney installations and for improving draught conditions

摘要

The invention relates to a process for controlling waste gas temperatures in chimneys and flue-gas ducts. For this purpose, there is built into the chimney a suction and acceleration section, consisting of an annular channel, for suction of the flue gases, and of, arranged in front of this, an acceleration nozzle, through which the flue gas is guided back into the chimney. A fan connected to the waste gas annular channel conveys the flue gas through a heat exchanger where it is cooled down. A measuring system optimises the heat recovery. As a result of the simultaneous acceleration of the waste gases in the chimney centre, the draught behaviour of the chimney is improved. Drawing "1" shows the system arrangement with the suction channel (1) and the acceleration nozzle (2). <IMAGE>