FIELD: boiler equipment, in which natural gas and liquid fuel are used as fuel. SUBSTANCE: installation comprises evaporating stage 14 in the direction of motion of combustion products with spraying device 17, connected to condensation stage 20 through a pipeline and made in the form of vertical heat-exchange elements 10 secured in the upper 16 and lower 6 tube plates; located at the top is steam superheater 15 connected through a pipeline to vacuum pump 13 creating conditions for water evaporation and boiling within a temperature range from 40 to 50 C, and flash steam cooler 12 installed past it, and it the bottom - steam generating vessel 9 which accommodates nozzles 10 spraying water fed through adjustable shut-off device 11, furnished with water level regulator 8, and condensate removed from condensate collector 4 by exhaust pump 24 operating under the action of condensate level regulator 22. The installation is also furnished with discharge line 2, having blow-off pump 5. EFFECT: use of low-grade heat, enhanced quality of flue gas cleaning of ash and harmful effluents. 1 dwg
