半淹没式旋转孔板污水取水机水力特性数学模型及运行分析

针对污水源热泵系统中过滤除污装置流量稳定性差、不易调节并影响换热器效率的问题,介绍了新型半淹没式旋转孔板污水取水机,研究了其工作原理,通过建立数学模型分析了污水中污杂物浓度、污水的液面高度、孔板的旋转周期对其过流量、过滤负荷、滤面堵塞系数的影响。结果表明:污水液面高度、孔板旋转周期一定的条件下,污水浓度增加将导致孔板过流量减小,滤面堵塞系数增加;通过调整液面高度和孔板旋转周期可调节由于污水中污杂物浓度变化对孔板过流量的影响,且孔板旋转周期调节效果优于液面高度。

Mathematical Model and Operation Analysis of Semi-submerged Rotary Orifice Sewage Source Heat Pump Intake Machine

To solve the flow instability and adjustment difficulty of filtering dirt-removing device in the sewage source heat pump system, which affect the efficiency of heat exchanger, semi-flooded rotary orifice sewage auto-strainer was generated. According to establishing the mathematical model, the effect is analysed of pollutant concentration and liquid level height of sewage and rotation period of orifice plate to filtered flow rate, filtered load and filtering surface block coefficient. The result shows that: in the certain condition of sewage liquid level height and orifice plate rotation period, the increase of sewage will decrease the filtered flow rate of orifice plate, and increase filtering surface block coefficient; The effect of pollutant concentration change in the sewage to orifice plate filtered flow rate could be adjusted by regulating the sewage liquid level height and orifice plate rotation period, and the moderating effect of orifice plate rotation period is better than that of sewage liquid level height.