气化炉排灰用于焦化废水处理的研究  

STUDY ON COKING WASTE WATER TREATMENT BY SLAG AFTER GASIFICATION

作　　者：张继柱[1,2] 张永奇 王洋[2] 

机构地区：[1]中国科学院研究生院,北京100049 [2]中国科学院山西煤炭化学研究所,太原030001

出　　处：《煤炭转化》2011年第2期86-90,共5页Coal Conversion

基　　金：国家高技术研究发展计划(863)项目(2007AA05Z327);中国科学院知识创新工程前沿方向项目(KGCX2-YW-334)

摘　　要：利用预处理后的气化炉排灰对焦化废水进行了深度处理,通过吸附实验研究了处理焦化废水的工艺条件,并对其吸附原理进行了初步探讨.研究结果表明,通过筛分和浮沉实验能够有效分离出灰分,富集排灰中的富含碳灰渣,其含碳量可达到80%;富含碳灰渣具有较快的吸附速率,在2 h左右达到吸附饱和;富含碳灰渣用量为30 g/L时CODcr去除率可达到88%;Freundlich吸附等温式能较好地描述吸附过程.富含碳灰渣具有较大比例的中孔结构,有利于吸附处理焦化废水,吸附速率大.The research on the thorough treatment of the coking waste water has been carried out with slag of gasifier by pretreatment, in which the process condition of treating coking waste water was studied and the adsorption principle was preliminarily investigated. The results show that carbon-containing materials could be concentrated and ash could be separated effective- ly by screening and float-sink test and the content of carbon could reach 80%. The adsorption process had a big adsorption rate and reached adsorption saturation in 2 h. The removal rate of chemical oxygen demand could reach 88% when the concentration of carbon-rich slag was 30 g/L. The adsorption process could be described well with Freundlich isotherms equation. The char with the larger proportion mesopore was beneficial to adsorb the coking waste water, which had a bigger adsorption rate.

关 键 词：灰渣 富集 半焦 焦化废水 吸附 

分 类 号：TQ536.4[化学工程—煤化学工程]