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本文总结了无烟煤在有飞灰回送的流化床上燃烧实验结果。由于采用了细灰循环再燃烧技术，很大地提高了其燃烧效率。针对ＱＹＤＷ＝４０００ｋｃａｌ／ｋｇ的京西无烟煤，在床温９４５℃～９８０℃的条件下，循环倍率Ｒ从０增加到１．９时，燃烧效率从５９．５７％提高到９３．３３％。试验还表明，增加床温、气速都可提高燃烧效率。试验研究在床面积２８５×２８５ｍｍ￣２的流化床装置上进行，该装置的细灰循环系统由旋风除尘器，“Ｌ’型阀、喷射器和底部饲料器组成，试验验证了该系统及设备的适用性。为灰循环技术使用于循环流化床上提供了一定的参考依据。
This paper summarizes the combustion results of anthracite in a fluidized bed with fly ash returned. Due to the use of fine ash recycling technology, greatly improve its combustion efficiency. For Beijing West anthracite with QYDW = 4000kcal / kg, the combustion efficiency increased from 59.57% to 93.33% when the cycle rate R increased from 0 to 1.9 at bed temperature 945 ℃ ~ 980 ℃. Experiments also show that increasing the bed temperature, gas velocity can improve the combustion efficiency. The experimental study was carried out on a fluidized bed apparatus with a bed area of 285 × 285 mm × 2. The fine ash recycling system consisted of a cyclone, an “L” valve, an ejector and a bottom feeder. The tests verified that the system The applicability of the equipment provides a certain reference for the application of the gray cycle technology in the circulating fluidized bed.