BOILER PLANT Russian patent published in 2007 - IPC F22B33/18 F23J15/08 

FIELD: heat power engineering.

SUBSTANCE: boiler plant comprises chimney with air passage between the ferroconcrete shaft and lining that defines a gas-discharging passage, heat exchanger that underlies the gas-discharging passage of the chimney and is used for heating air, and fan for supplying heated air to the air passage of the chimney. The air passage is separated into two sections by means of vertical baffles. The chimney is provided with a box for discharging heated air from one section of the air passage to the other section. The base of the gas-discharging passage of the chimney is provided with a ring perforated collector of variable cross-section provided with the branch pipe connected with the air passage for supplying heated air from the air passage to the near-wall layer of flue gases flowing in the gas-discharging passage.

EFFECT: enhanced reliability.

2 dwg