我国动力用煤煤灰自身固硫特性的统计分析-环境科学学报.PDF

19 1 Vol. 19, No. 1 1999 1 ACTA SCIENTIAE CIRCUMSTANTIAE Jan., 1999 盛昌栋 (, 210096) 186 , , Ca/ S Mg/ S2Na/S 2K/ S , ; , Ca/ S ; . ; ; . Characteristics of sulphur retention in ashes of chinese coals used for power generation SHENG Changdong (Depart ent of Power Engineering,Southeast University,Nanjing 210096) Abstract The characteristics of sulphur retention in laboratoryprepared ash was statistically analyzed based on regular analyticaldata fro a set of 186 coal sa ples.It isshownthat the higher sulphur content of coal is,the lower olar ratio of Ca/ S and olar ratios of Mg/ S,2Na/ S,2K/ S are,thus the lower per centageof sulphur retention in ash is.Calciu playsa pri ary role insulphur retention,and the percentage of sulphur retained in ash increasesasan exponentialfunction with the incre ent of Ca/ S olar ration of coal.The active parts of the rest basic ele ents(Mg,Na, K,etc.) can also contribute to sulphur retention. It is i plied fro the results of this investigation that the sulphur retention behavior of laboratorypre pared ash can be applied to fluidized bed co bustion and can be used as reference in pulverized coal co bustion. Keywords coal, sulphur,ash. , [ 1 5] . SO 2 .[ 2 5] , .186 , ,, . 1 * 186 .. , ( S t,d 1%)( 1% S t, d 3%) ( S t,d 3%) [ 6] 570%355%75%. , * .. 1990 78 19 . , . 1Ca/ S (Ca/ S , ) .1(a) ,