蒸发冷却系统循环水旋流除沙的实验研究  

Experiment on removal of sand by circulating water flow in evaporative cooling system

作　　者：章立新[1] 刘跃[1] 高明[1] 刘婧楠[1] 李鑫[1] 

机构地区：[1]上海理工大学能源与动力工程学院,上海200093

出　　处：《水资源与水工程学报》2015年第5期151-155,共5页Journal of Water Resources and Water Engineering

基　　金：上海市科委科研计划项目(13DZ2260900)

摘　　要：本文开展了以低水耗为目标的水力旋流除沙研究。其技术方案是在底部集水盘的排污口附近建立一个带水力旋流器的除沙旁路,在直径为Φ50mm的水力旋流器上采用非常规的1~4mm的小口径底流管排沙,溢流仍然回到底部集水盘,并根据底部集水盘的积沙情况间歇运行。实验研究了在其它结构参数和操作参数都在常规范围内且保持不变的条件下,不同底流口径与底流分流比及底流产率的关系。结果表明:当底流口径在2 mm附近时,同时达到最小的底流分流比和最大的底流产率,说明存在一个最佳的节水除沙底流口径;在该口径下,对实验台容积为68.7L的进料池循环运行30 min,除沙率可达90%,耗水量仅占进料池总水量的1.75%,达到了节水除沙的目的。This paper aims to improve efficiency of removal of sand with less water consumption .The scheme is to set a bypass involve a hydraulic cyclone on bottom of the water tank for sand removal .The hydraulic cyclone of Φ50mm with unconventional small range of underflow diameter (1-4mm) were se-lected to investigate the sand removal performance .The overflow flows back to the water tank and its run-ning is under an intermittent control which depends on the condition of sands accumulating .The experi-ment focus on the relationship between underflow diameter and underflow productivity as well as split rati -o, keeping other operating and geometry parameters to be constant in their conventional range .The result shows that the underflow productivity and the split ratio reach their maximum and minimum respectively when the underflow diameter is nearby 2 mm.It means that there's an optimum underflow diameter for sand removal and water saving .After applying the hydraulic cyclone with 2mm underflow diameter to an experiment system with the inlet pool's volume of 68.7L for 30 minutes, it can achieve the sand removal rate of 90%and consume merely 1.75%of the total water of inlet pool , which reach the target of saving water and removing sand .

关 键 词：水力旋流器 蒸发冷却设备 循环水系统 节水 除沙 底流分流比 底流产率 

分 类 号：TU991.42[建筑科学—市政工程]