| 摘要 |
<p>Provided is a boiler system having improved heat efficiency when a closed-type condensate recovery apparatus and a boiler are combined. A boiler system (1) provided with: a through-flow boiler (10) for generating steam by heating feed water using combustion gas; a closed-type condensate recovery apparatus (20) for recovering, at high temperature and high pressure, condensate produced by condensing steam generated by the through-flow boiler (10), and supplying the condensate to the through-flow boiler (10); and a feed water heater (30) for performing heat exchange between combustion gas discharged from the through-flow boiler (10) and condensate supplied to the through-flow boiler (10), the boiler system further provided with an air heater (40) for causing the combustion gas heat-exchanged by the feed water heater (30) and combustion air supplied to the through-flow boiler (10) each to circulate in the reverse direction to perform heat exchange.</p> |
