PLANT AND METHOD OF THERMAL NEUTRALISATION AND RECOVERY OF HEAT OF SMOKE GASES DISCHARGED FROM FUEL-BURNING UNITS, AND SYSTEM TO CONTROL THEIR OPERATION Russian patent published in 2014 - IPC C10B27/00 C10B45/00 B01D53/75 F23G7/06 

FIELD: power engineering.

SUBSTANCE: plant comprises a fuel-burning unit connected to a stack by means of a horizontal flue equipped with a gate, which is placed in the zone of adjacency of the horizontal flue end towards the stack, a circuit of cleaning of smoke gases, including a waste heat boiler, a smoke exhaust with a guide vane, at the same time the inlet of the circuit of smoke gases cleaning is connected to the horizontal flue in the section between the fuel-burning unit and the gate, and the outlet of the circuit of cleaning of smoke gases adjoins the stack, at the same time the outlet of the circuit of cleaning of smoke gases is arranged oppositely to the outlet of the horizontal flue into the stack. The method of plant operation includes removal of smoke gases from a fuel-burning unit into a horizontal flue, removal of smoke gases from the horizontal flue into the circuit of cleaning of smoke gases with subsequent neutralisation in the waste heat boiler, removal of smoke gases from the cleaning circuit into the stack oppositely to the outlet of the horizontal flue and adjustment of underpressure in the horizontal flue downstream the gate at the side of the stack due to variation of speed of smoke gases supply from the cleaning circuit.

EFFECT: reduced overflow of uncleaned smoke gases into a stack, maintenance and control of the specified flow of cleaned smoke gases for recirculation at different position of a gate and efficient heat recovery of smoke gases.

4 cl, 5 dwg, 6 tbl, 1 ex