论文部分内容阅读
根据Turow电厂OP-650—b型锅炉的几年运行经验可知,锅炉管子的飞灰磨损已是波兰发电机组中的突出问题。该电厂燃用褐煤,平均发热量为1900大卡/公斤,灰分为25%,但经常出现发热量下降至1300～1500大卡/公斤,而灰分上升到30%的现象。当煤的水分是50%时,这就意味着干燥煤的灰分达50%,在发热量低的煤中甚至达60%。省煤器运行15000小时(约2.5年)后首次爆管。飞灰对管子的最大磨损发生在锅炉后墙附近,主要在对流过热器和省煤器上排
According to several years of operation experience of OP-650-b boiler in Turow Power Plant, it is known that the fly ash wear of boiler tubes has become a prominent issue in Polish generator sets. The power plant lignite burning, the average heat 1900 kcal / kg, ash 25%, but often appears calorific value down to 1300 ~ 1500 kcal / kg, while the ash rose to 30% of the phenomenon. When the moisture content of the coal is 50%, this means that the ash content of dry coal is up to 50% and even up to 60% in low calorific coal. Economizer runs for 15,000 hours (about 2.5 years) after the first squib. The maximum wear of fly ash on the tube occurs near the back wall of the boiler, mainly on the convection superheater and the economizer upper row