旋流式壅塞空化器处理苯酚溶液研究

壅塞空化是一种新型的水力空化技术,在壅塞空化器喷嘴内加入旋流芯即成为旋流式壅塞空化器。在不同背压和旋流芯长度下,利用CFD软件对旋流式壅塞空化器内部流场进行了数值仿真,并对不同初始浓度的苯酚溶液采用高效液相色谱仪检测其处理前后的质量浓度变化。计算结果表明,旋流式壅塞空化器内部产生的涡环对壅塞空化具有促进作用,并存在最佳背压和旋流芯长度。模拟污水处理试验结果表明:当背压为200 k Pa,旋流芯长度为3/4倍导程,苯酚溶液的初始质量浓度为5 mg/L时,旋流式壅塞空化器对苯酚溶液的去除效果最佳。

Study on the Treatment of Phenol Solution by Swirling Choking Cavitators

Choking cavitation is a recent technology of hydrodynamic cavitation. A swirling choking savitator can be formed by adding a swirling core into the nozzle of the choking cavitator. With different back pressures and swirling core lengths, a numerical simulation can be achieved of the internal flow field in the cyclone choking cavitator by using CFD software. The change of mass concentration of the phenol solution with different initial concentration can be treated with a high performance liquid chromatograph. The calculation results show that the vortex ring generated in the internal swirling choking cavitator helps to promote the choking cavitation, with an optimal back pressure and swirling core length. The simulation test results of wastewater treatment show that: when the pressure is 200 kPa, the swirling core length will be of 3/4 lead; when the initial concentration of phenol solution is 5 mg/L, an optimal phenol removal efficiency can be achieved by the swirling choking cavitator.