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新型生物流化反应器氧转移的特性
引用本文:张玉魁,张硌,施汉昌.新型生物流化反应器氧转移的特性[J].中国环境科学,2003,23(5):0-0.
作者姓名:张玉魁  张硌  施汉昌
作者单位:1. 清华大学环境科学与工程系,环境模拟与污染控制国家重点联合实验室,北京,100084
2. 河南省科学院地理研究所,河南,郑州,450052
基金项目:“863”计划资助项目(2002AA601200)
摘    要: 气体的转移是废水处理过程中的重要环节,基于气体转移的“双膜理论”,采用在反应器中清水曝气的方法,对新型生物流化反应器进行了氧转移特性的研究.结果表明,在实验范围内,随着曝气量的增大,氧传质系数呈直线上升;投加载体后,随着载体量的增加,氧传质系数降低.在新型生物流化反应器不同运行方式下,随着Ad /Ar(降流区与升流区面积比)变大,反应器中氧传递效果变差.新型生物流化反应器氧利用率可以达到10%,充氧动力效率可以达到5.5kgO2/(kWh).并且在载体浓度较高和空塔气速较大时,新型生物流化反应器氧利用率和充氧动力效率没有明显降低.

关 键 词:生物流化反应器  氧传质系数  氧利用率  充氧动力效率  双膜理论
文章编号:1000-6923(2003)05-0547-05
收稿时间:1900-01-01;
修稿时间:2003年1月17日

Oxygen transfer character in a new type of biological fluidized reactor
ZHANG Yu-kui,ZHANG Luo,SHI Han-chang.Oxygen transfer character in a new type of biological fluidized reactor[J].China Environmental Science,2003,23(5):0-0.
Authors:ZHANG Yu-kui  ZHANG Luo  SHI Han-chang
Institution:ZHANG Yu-kui1,ZHANG Luo2,SHI Han-chang1
Abstract:Gas transfer is an important part of wastewater treatment process. Based on the double-film theory, the oxygen transfer character was studied in a new type of structure modified biological fluidized reactor (SMBFR), adopting clean water aeration in the reactor technique. In the range of experiment, the oxygen transfer coefficient KLa has a directly proportional relationship with the aeration degree increasing; after the carrier is added, with increasing of the carrier amount, KLa will reduce. Under different type of SMBFR operation, the oxygen transfer efficiency decreases with increases of Ad/Ar (the area ratio of flow-decreasing area to flow-increasing area) oxygen utilization ratio EA can reach 10%, and the power efficiency of oxygen supply Ep can reach 5.5kgO2/(kWh) in SMBFR. In addition, with the carrier concentration and air velocity supply higher, EA and Ep will not decrease obviously.
Keywords:biological fluidized reactor  oxygen transfer coefficient  oxygen utilization ratio  power efficiency of oxygen supply  double-film theory
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