【作者】 王会平；

【导师】 王白杨；

【作者基本信息】 南昌大学 ， 环境工程， 2007， 硕士

【摘要】 我国以燃煤为主,每年有近亿吨粉煤灰排放,大量粉煤灰堆放,不仅占用土地,而且对环境造成很大危害。粉煤灰陶粒是综合利用粉煤灰的一个重要途径。本文叙述了粉煤灰的理化性质及矿物组成,利用本地粉煤灰丰富的原料优势,进行了免烧陶粒工艺的探索。通过系统的试验得出,以粉煤灰、水泥为主要原料,掺入激发剂和轻质材料,经搅拌、成型、自然养护等工艺,能够得到一种比表面积大、低密度的粉煤灰陶粒。通过试验找到了粘结剂和轻质材料等添加量对粉煤灰陶粒性能的影响趋势。并通过正交试验确定了制备粉煤灰陶粒的工艺条件和配方,对粉煤灰陶粒的性能进行了系统的测定和分析,免烧粉煤灰陶粒性能符合国标的规定。设计曝气生物滤池,分别采用粉煤灰陶粒和对比陶粒作为生物膜载体进行配制废水处理试验,经比较发现当进水CODcr浓度为187.3～299.2mg/几,NH₃-N在23.2～39.4mg/L时,粉煤灰陶粒对CODcr和NH₃-N的去除效率为85.9%和93.8%,充分说明粉煤灰陶粒作为曝气生物滤池载体的可行性。利用粉煤灰制备水处理陶粒,既可以有效地利用粉煤灰,还可以缓解城市用水紧张的局面,达到资源综合利用、以废治废的目的,将会产生可观的经济价值和明显的社会效益。更多还原

【Abstract】 Our country is burned coal country primarily,and nearly a hundred million tons of fly ash is discharged. A large amount of fly ash is piled up,not only holds a lot of land but also has great harm for the givironment. It is an important path to exploitage synthetically to manufacture haydite with fly ash.In this paper,the chemical and physical properties and mineral components of fly ash coals are mentioned. We take active part in studying the other process which could avoid burning stage on basis of the local raw material.Take active part in studying the other process which could avoid burning stage on basis of the local raw materil. Through experiments,based on the nature of fly ash and cement,selected the compound activator to active fully their hydration activity.They need to be churned,sophered,natural maintenanced and so on,thus make the specific surface area and the light weight ceramsite.Effect of sintering point, light quality material contentand adherent content to the characters of ceramisite made from fly ash are found through experiment.Through experiments,the rational ratio of fly ash, cement and the other material and conditions are confirmed. Performance of the ceramisite made from fly ash is tested and analyzed,this kind of ceramsite can follow the national regulation.Biological Aerated Filters （BAFs）with biofilm media of ceramisite made from fly ash and ceramisite for comparison are designed to treat the simulated wastewater. When the inflow COD and NH₃-N are 187.3～299.2 mg/L and23.2～39.4mg/L, the average eficiency is about 85.9% and93.8 % respectively. So it is feasible to be biofilm carrier in BAF for ceramisite made of fly ash.Utilize fly ash to prepared the ceramsite of water treatment,not only effectively utilized fly ash ,but also relieve the in short situation of urban water, at aim to comprehensive resource utilization and dispose waste by waste,has obvious economic returns and social efects.更多还原