BOILER PLANT OPERATION METHOD Russian patent published in 2015 - IPC F22B33/18 

FIELD: power engineering.

SUBSTANCE: main flow of water steam generated in a boiler is sent into a shell-and-tube heat exchanger to heat network water to temperature of 110-120°C, heated network water is supplied into the supply pipeline of the heat supply system, and water steam condensed produced in the shell-and-tube heat exchanger is drained into a collecting condensate tank, some water steam produced in the boiler is sent into a deaerator for degassing of make-up water and condensate, products of combustion of natural gas downstream the boiler is cooled in a water economiser to 140-160°C, and along the main pass they send it into a condensation surface heat-exchanger-utilizer of combustion products heat, where their deep cooling is carried out to temperature of 35-40°C with condensation of some water vapours contained in gases, at the same time to eliminate condensation of water vapours in external passes and in a stack left in exhaust combustion products after their deep cooling, exhaust combustion products are heated to 65-70°C by network water from the supply pipeline of the heat supply system in the surface heat exchanger installed downstream the condensation heat-exchanger-utilizer at the suction side of the smoke exhaust.

EFFECT: increased efficiency of a boiler plant.

1 dwg