射流混合装置性能对比试验  

Experiment of Performance Comparison for Jet Mixing Devices

作　　者：葛芳州 蒋竹荷 罗欣 李彩斌 彭光霞 

机构地区：[1]北京市中持绿色能源环境技术有限公司,北京100192 [2]北京建筑大学城市雨水系统与水环境省部共建教育部重点实验室,北京100044

出　　处：《净水技术》2017年第8期32-36,45,共6页Water Purification Technology

基　　金：水体污染控制与治理科技重大专项城市污水高含固污泥高效厌氧消化装备开发与工程示范子课题高含固厌氧消化系统装备研究与开发(2013ZX07315-001-05)

摘　　要：本试验对水力搅拌和水力气体结合搅拌两种形式的喷嘴进行实际应用效果的研究,对比不同工况下的流场情况,给出工程应用方面的建议,研究表明:流量越大,混合效果越好,当流量为315 m^3/h,即喷嘴入口流速为4.95m/s时,两种喷嘴混合效果最佳;对于液液喷嘴,安装高度为2 m的混合效果优于安装高度为1 m;对于气液喷嘴,安装高度为2 m的混合剧烈程度大于安装高度为1 m,但作用范围较小;同时发现气液喷嘴的吸气量与液体流量存在较好的对应关系。在工程应用中,液液喷嘴通过设置折流板可以加强局部垂直方向的混合;气液喷嘴通过调整安装高度可以调节其作用范围和混合剧烈程度。The test on practical application effect of two different nozzles is studied. Comparing the flow field under different working conditions, the engineering application suggestions are given. Studies have shown that ： （ 1 ） the greater the flow rate, the better the mixing effect, two kinds of nozzles mixing effect is the best when the flow rate is 315 m3/h, as the inlet velocity is 4.95 m/s; （2） For liquid -- liquid nozzle, the mixing effect at installation height of 2 m is superior to the effect at the height of 1 m; For gas -- liquid nozzle, the mixing intensity at installation height of 2 m is greater than the intensity at the height of 1 m, but the scope is smaller; （3） Inspiratory capacity and liquid flow of gas-liquid nozzle exist good corresponding relation; （4） In engineering applications, by setting the baffle plate liquid-iquid nozzle can strengthen the local vertical mixing; （5） by adjusting the installation height gas-liquid nozzle can adjust its scope and mixing intensity.

关 键 词：污泥厌氧消化 水力搅拌 气体搅拌 射流混合 

分 类 号：TU443[建筑科学—岩土工程]