FIELD: heating.
SUBSTANCE: invention relates to boiler industry and can be used in improving hot-water boilers by increasing heat exchange area. Gas release mechanism from fuel combustion chamber during opening of tight rotary door in fuel hopper includes boiler housing, fuel hopper, fuel combustion chamber in fuel hopper, rotary door, slide valve installed between flue channel and fuel bunk perpendicular to door leaf of swivel door. Slide valve is fixed from inside to the door leaf and can turn together with the door leaf, and the seat is the end surface of the partition. Slide valve is installed between the first and second smoke channels, starting from below. Partition is made in the form of a cavity formed between the first and second smoke channels, and the radial surface of the cavity is oriented along the fumes.
EFFECT: higher efficiency of boiler operation due to expansion of horizontal sections of heat exchange surfaces.
1 cl, 3 dwg
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