MULTI-MODE HEAT EXTRACTION PLANT Russian patent published in 2011 - IPC F01K23/06 

FIELD: power industry.

SUBSTANCE: multi-mode heat extraction plant can be used in power engineering, mainly for erection of combined heat power plants (CHPP). Multi-mode heat extraction plant in which additional pump of intermediate-pressure heat carrier is used; the first and the second heating surfaces are in series installed in hot-water heat recovery steam generator in gas flow; deaerator of steam turbine plant through feed pump and the first heating surface is connected to feed water pipeline equipped with shutoff control valves, with steam generator; supply branch pipe of intermediate pressure heat carrier pump is connected to pipelines equipped with shutoff valves, through the second and the first heating surfaces of hot-water heat recover steam generator, and heating surface of heater of delivery water of heat network with suction branch pipe of intermediate pressure heat carrier pump which is also connected through pipeline with shutoff control valves to deaerator of steam turbine plant; the second heating surface of hot-water heat recovery steam generator is also connected through condensate pipelines to inlet and outlet of LP feed water heaters of steam turbine plant.

EFFECT: invention allows reducing capital costs for the plant, reducing metal consumption and improving reliability of water-to-water heaters of delivery water.

2 dwg