STEAM-GAS PLANT WITH DEAERATOR-EVAPORATOR Russian patent published in 1998 - IPC

FIELD: heat power engineering. SUBSTANCE: in first version of proposed design deaerator 16 is hydraulic coupled through heating steam inlet with deaerator evaporator 11. According to first design version deaerator evaporator 11 is placed before low pressure evaporator 12 in flue gas flow and deaerator 16 is provided at feed water outlet with hydraulic coupling through regulating valve 10 with low pressure drum 6 and at steam line outlet, with hydraulic coupling with low pressure drum 6 through emergency bypass valve 20. According to second design version, deaerator evaporator 11 is placed before low pressure evaporator 12 in flue gas flow, deaerator 16 is provided with hydraulic coupling at feed water outlet, through regulating valve 19, with low pressure drum 6 and with separator 22 hydraulically coupled by steam outlet with deaerator evaporator 11 and by feed water outlet, through regulating valve 23, with deaerator 16 and by steam outlet, through regulating valve 24, with deaerator and through emergency bypass valve 25, with low pressure drum 6. In addition to peculiarities of first and second design versions, according to claim 3, condensate gas heater 13 is furnished with intermediate header 20 hydraulically coupled through regulating valve 21 with inlet by recirculating pump of heater 15. Design peculiarity of claim 3 is applicable to first and second design versions of proposed invention. EFFECT: enlarged operating capabilities. 3 cl, 2 dwg