IMPROVED STEAM CYCLE FOR DUAL PRESSURE WASTE HEAT BOILER WITH INTERMEDIATE SUPERHEATING Russian patent published in 2015 - IPC D21C7/00 

FIELD: power engineering.

SUBSTANCE: present invention relates to the field of power generation and design of industrial boilers, including waste heat boilers of the process of sulphatic cooking of cellulose or waste heat boilers of soda technological process used in cellulose and paper industry. The system of dual pressure boiler and steam turbine comprising a top furnace chamber for high pressure steam generation, a high pressure boiler superheater, hydrodynamically connected to the top furnace chamber for high pressure steam superheating, and the high pressure steam turbine for intake of steam from the boiler superheater and flow generation, exhausted (discharge) steam; the bottom furnace chamber comprising the system generating the low pressure steam of natural circulation for obtaining of low pressure steam; an intermediate superheater for overheating of the flow exhausted from the steam high pressure turbine; and the low pressure steam turbine for intake of superheated steam where the bottom furnace chamber is hydrodynamically connected for providing of low pressure steam in the steam flow exhausted from the high pressure turbine.

EFFECT: dual pressure waste heat boiler can be connected with multiple condensation, non-condensation, or with combination of condensation and non-condensation turbine cycles to ensure the increase of power generation.

33 cl, 12 dwg