VERTICAL FIRE-TUBE BOILER Russian patent published in 1999 - IPC

FIELD: heating systems and hot- water supply systems. SUBSTANCE: boiler includes combustion chamber of burner unit, smoke stack with vertical flue tubes, turbolators and heat insulation. Lower portion of boiler is made in form of vertical section combined by means of through vertical flue tubes; sections are divided by tube sheets and are communicated by means of check valves. Volume of sections is found from the following expression: (t_s.s.-100^°C)•V_b≤₅, where t_s.s. is saturated steam temperature; V_b is water volume of upper section of boiler, cu.m. EFFECT: reduced cost of generated steam by 20 to 40%.