WASTE HEAT BOILER (VERSIONS) Russian patent published in 2013 - IPC F22B1/18 

FIELD: power engineering.

SUBSTANCE: waste heat boiler is proposed, comprising a vessel, inside of which there is a gas heater of condensate, connected via a pump to a condenser and a thermal deaerator, a low pressure evaporator connected with a low pressure drum and a thermal deaerator, a low pressure superheater, connected with a low pressure drum and a steam turbine, a high pressure economiser, connected with the thermal deaerator and a high pressure drum, a high pressure evaporator, connected with the high pressure drum, a high pressure superheater, connected with the high pressure drum and the steam turbine, and dispensing and collecting headers, at the same time the low pressure evaporator is divided into two parts-upper and lower ones, every of which is connected to the dispensing header and additionally installed collecting header, connected with the low pressure drum, besides, the low pressure drum is connected via pumps or via a tee with dispensing headers and evaporating surface of low pressure.

EFFECT: invention makes it possible to increase service life of low pressure evaporator bends as a result of reduced speed of steam and water mixture.

2 cl, 2 dwg