养殖场UBF反应器布水装置优化设计

Optimization design of water distribution unit in UBF reactor used in livestock farm

针对重庆合川某规模化养猪场中温UBF-SBR工艺废水处理系统存在的主要缺陷——反应器布水不均,应用FLUENT软件,研究了系统中关键的UBF反应器布水装置的工作特性。通过模拟分析,优化设计出了结构较简单、制造方便的反应器布水装置。优化前的UBF反应器布水装置各个布水口出水速度相差明显,最大速度比最小速度快近4.1倍,而优化后各出水口速度差别缩小,最大速度比最小速度仅快0.6倍,投入使用后污水处理效果得到了明显提高。

In order to resolve the problem of uneven water distribution, which was the main defect of UBF-SBR process in wastewater treatment used in a large-scale pig farm in Chongqing Hechuan, the operating characteristics of water distribution unit were studied with FLUENT software. Water distribution unit was one of the most critical units in UBF reactor. After simulation and optimization, a new water distribution unit was designed, which had a simple structure and was easy to be manufactured. Before the optimization, there were significant differences of velocities of flow among all outlets in water distribution unit. The maximum velocity was 4.1 faster than the minimum velocity. Through the optimization, however, the velocity differences were greatly reduced. The maximum velocity was only 0.6 faster than the minimum velocity. Practice has proved that the efficiency of wastewater treatment of UBF reactor has been enhanced obviously.