自吸式曝气搅拌装置用于高温好氧消化系统的供氧性能研究  

OXYGEN SUPPLY PERFORMANCE OF GAS-INDUCING AGITATOR SYSTEM FOR AUTOTHERMAL THERMOPHILIC AEROBIC DIGESTION PROCESS

作　　者：张敏 田代幸宽 酒井谦二 ZHANG Min;TASHIRO Yu-kihiro;SAKAI Ken-ji(Department of Bioscience and Biotechnology,Kyushu University,Fukuoka 819-0395,Japan)

机构地区：[1]九州大学生物资源环境科学学府,福冈县福冈市819-0395

出　　处：《环境工程》2020年第8期8-12,共5页Environmental Engineering

基　　金：国家留学基金委公派留学项目(201706460009)。

摘　　要：将曝气搅拌一体式自吸式曝气搅拌装置应用于自热式高温好氧消化(45~65℃)系统,并与传统曝气搅拌分离式的盘式涡轮搅拌装置进行对比,系统考察了2种曝气搅拌装置的供氧性能与经济可行性。结果表明:自吸式曝气搅拌装置适用于搅拌速度为500~1100 r/min,过低或过高的搅拌速度都会影响系统的供氧能力;当搅拌速度为900 r/min,曝气量为0.5 L/min(通气率)时,盘式涡轮搅拌装置的K Lα值为108.01 h^-1,低于同条件下的自吸式曝气搅拌装置。盘式涡轮搅拌装置在相同曝气条件下,50℃时的K Lα值高于30℃时。在1000 r/min转速下,为实现相同的K Lα值,自吸式曝气搅拌装置的电能消耗约为盘式涡轮搅拌装置的1/3。Gas-inducing agitator system and disk turbine agitator system were applied to autothermal thermophilic aerobic digestion system;this study compared the oxygen supply performance and economic feasibility of these two agitator systems.The research showed that the gas-inducing agitator system was suitable for a stirring rate of 500~1100 r/min,a lower or higher stirring rate would affect the oxygen supply performance;with a stirring rate of 900 r/min and air flowrate of 0.5 L/min(by volume of air/volume of liquid),the K Lαvalue of the disk turbine agitator system was 108.01 h^-1,lower than that of gas-inducing agitator system of 124.52 h^-1;disk turbine agitator system under the same stirring rate and air flowrate,K Lαvalue at 50℃was greater than that of 30℃.To achieve the same K Lαvalue under 1000 r/min,the power consumption of the gas-inducing agitator system was about 1/3 of that of the disk turbine agitator system.

关 键 词：自吸式曝气搅拌装置 盘式涡轮搅拌器 总氧传递系数 自热式高温好氧消化 电能消耗 

分 类 号：X703[环境科学与工程—环境工程]