进入热泵机组的江水水质与过滤特性试验

Experiment on filtration characteristics and water quality of Yangtze River water into heat pump unit

为解决长江中上游的地表水中含沙量大,微生物以及悬浮物含量高,而不能直接作为江水源热泵机组的循环冷却用水的问题,对长江重庆段的水温和水质情况进行了分析,介绍了水流防堵除渣装置的原理,并通过试验测试了水流防堵除渣装置的性能.试验结果表明:过滤后的江水含沙量可降低到100 g/m3左右,平均去除率达68.5%,悬浮物及水藻含量也明显减少,浊度基本能够控制在50～100 NTU,平均去除率为73.1%,能够满足直接进入机组的水质要求.装置压力管道负载阻抗与安装管路特征阻抗相匹配,其水击压力幅值很小,能解决长江水进入热泵机组的清污、防堵、防水击的关键技术.整个分离系统结构简单,安装方便,运行可靠,运行费用低,能实现利用水流及重力完成浊水的自动过滤、自动清渣和自动排污,可在长江中上游的地表水源热泵中应用.

Because the surface-water in upper region of the Yangtze River contains large amounts of silt and algae,high content of microorganisms and suspended solids,it can not be directly used as circulating cooling water in the river water source heat pump unit.In order to solve the problem,the water temperature and quality of Yangtze River in Chongqing area were analyzed,the principle of application of water to prevent clogging of the filter device was introduced,and the performance of clean-up and anti-clogging of device was tested through experiment.The experimental results show that the river se-diment can be reduced to 100 g/m3 after filtration,with an average removal rate of 68.5%,and suspended solids and algae levels also decreased to 50-100 NTU basically,with its average removal rate is 73.1%,which can meet the requirements of water quality into heat pump unit directly.The load impedance of pipe lines matches the characteristic impedance,and the water hammer pressure amplitude is small.It can resolve the key technical problems of clean-up,anti-clogging and anti-water hammer when the surface-water runs into the heat pump in the upper Yangtze River region.The entire separation system is simple,easy installation,reliable operation,low operation cost,and can be automatic cleaning,filtering and sewage residue automatic draining using the water flow and gravity,so it has great application prospects in the surface water source heat pump system in the Yangtze River region.