| 摘要 |
PURPOSE: A boiler system with a double effect economizer is provided to improve collection efficiency of condensation latent heat and sensible heat of an exhaust gas by driving two of condensing economizers according to supplied water temperature and temperature of the inside of a hot water tank. CONSTITUTION: A boiler system with a double effect economizer comprises a main body(10) of a boiler, a free economizer(20), a hot water tank unit(40), a post economizer(34), a first valve(SV1), a second valve(SV2), a third valve(SV3), a fourth valve(SV4), a fifth valve(SV5), and a supplied water temperature sensor(17). The main body of the boiler comprises a combustion chamber, a water drum, and a burner(12). The free economizer includes a tube supplying supplied water to the water drum. The hot water tank unit comprises a hot water tank storing hot water and a circulation pump(18). The post economizer includes a SUS tub including an inlet port and an outlet port. The first valve and the second valve supply water supplied from outside to the free economizer and the post economizer. The third valve supplies the hot water to the post economizer. The fourth valve and the fifth valve are closed according to a control signal of a drain valve. The supplied water temperature sensor senses the temperature of the hot water supplied to the first valve and the second valve. [Reference numerals] (12) Burner; (19) Water supply tank; (40) Hot water tank; (50) Control unit |
