煤液化残渣与褐煤混煤燃烧特性的实验研究

煤液化是提高煤炭资源利用率、减轻燃煤污染的有效途径1].在煤液化工艺过程中,煤液化残渣的主体是由液化原料煤中未转化的煤有机体、无机矿物质以及外加的液化催化剂组成,是一种高炭、高灰和高硫的物质,在某些工艺中会占到液化原煤总量的30%左右,如此多的残渣量对液化过程的热效率和经济性所产生的影响是不可低估的2].

Combustion performance of the blend of lignite and residues of coal liquefaction in thermal-banlance

The combustion performance of the blend of lignite and residue from Shenhua coal liquefaction was studied. It is found that the DTG plot for the combustion of residue of coal liquefaction has three characteristic peaks, while the DTG plot of lignite combustion has one characteristic peak. With the decreasing of the blending ratio of coal liquefaction residue to lignite the three characteristic peaks become faintness. The combustion activation energies of blended coals are calculated. Compared with the blended coals, the coal liquefaction residue has the biggest activation energy, but the lignite has the lowest one. With the blending ratio decreasing the activation energy and ignite temperature of blends decrease slightly. The maximum weight loss rate DTGmax for coal liquefaction residue is bigger than that for lignite.