焚烧含盐有机废液添加剂对流化床床料烧结的影响

研究分别以砂子和煤灰为床料,含盐废液在流化床中焚烧,添加剂CaO、Fe₂O₃、A1₂O₃对阻止床料结焦的作用机理.结果表明,当砂子或煤灰中形成Na₂CO₃时,CaO、Fe₂O₃能够解决床料的结焦问题,而Al₂O₃却促进砂子的结焦.当砂子中含有NaCl时,A1₂O₃能很好地解决砂子的结焦问题,而CaO、Fe₂O₃虽然对防止结焦有效果,但不能根本解决砂子的结焦问题.当煤灰中含有NaCl时,CaO、Fe₂O₃对于防止床料的结焦效果较好,而A1₂O₃反而造成严重结焦.研究结果为含盐有机废液在流化床中焚烧时防止床料结焦选择合适的添加剂提供理论依据.

INFLUENCE OF ADDITIVES ON BED SINTERING IN FLUIDIZED BED INCINERATOR TREATING WASTE SALTY LIQUID

Experiments were conducted to investigate the influence of additives CaO, Fe2O3 and Al2O3 on bed sintering, while waste salty liquids are treated in fluidized bed with sand or coal ash as bed material. The results show that CaO and Fe2O3 can solve successfully bed sintering problems, provided Na2CO3 is formed in sand or coal ash bed, however, Al2O3 can cause serious bed sintering at bed temperature. If NaCl is formed in the sand bed, Al2O3 can solve successfully the bed sintering, CaO and Fe2O3 have some effect on preventing bed from sintering, but these two additives can't solve the problem completely. If NaCl is formed in coal ash bed, CaO and Fe2O3 can solve successfully the bed sintering, however, Al2O3 can cause bad bed sintering. These results provide the base for the design and operation of fluidized bed incinerator for treating waste salty liquids.