FIELD: power engineering.
SUBSTANCE: heat and power boiler comprises a furnace having a rear wall and a channel for a furnace gas connected to the furnace. The furnace gas channel comprises a return passage provided on the side of the rear furnace wall and a heater for air for combustion, equipped with an inlet channel for furnace gas. The upper section of the inlet channel for furnace gas is connected to the lower section of the return passage. A flow channel for air for combustion is made as adjacent to the specified inlet channel for furnace gas for supply of heated air for combustion to the furnace. The inlet channel for furnace gas comprises two adjacent sections of the channel, which are connected to opposite sides of the return passage.
EFFECT: opportunity to develop a large heat and power boiler with acceptable dimensions.
15 cl, 3 dwg
