| 摘要 |
<p>A coal dry system is provided to lower the temperature of exhaust gas to be discharged to the air by recycling the exhaust gas discharged from a coal combustion facility in order to dry coal. A coal dry system comprises a boiler(5) generating steam by burning coal, a coal hopper(2) storing the coal, a coal feeder(3) transferring a necessary amount of coal to the boiler, a pulverizer(4) which pulverizes the coal delivered from the coal feeder to the fine powder and supplies to boiler, a combustion gas exhaust pipe(6) discharging the combustion gas out of the boiler, an air inlet pipe(7) drawing the external air into the boiler, an air preheater(8) preheating the external air in the air inlet pipe, a preheated air transfer piping(12) delivering the preheated air to the pulverizer, a first dust collector(9) collecting contaminant and dust included in the combustion gas, and a combustion gas exhaust passage(60) supplying the combustion gas to the coal hopper.</p> |
