Boiler with flue gas recycling circuit.

摘要

The present invention relates to a boiler comprising large-dimension vertical walls consisting of screens of exchange tubes, equipped with a flue gas recycling circuit (1) and comprising in its lower part a prismatic portion known as an ash box (2). The recycled combustion gases are conducted by at least one pipe (3) opening into one of the walls at the end of a hopper (4) arranged under the ash box (2). <IMAGE>