摘要
针对换热设备积垢与能源浪费问题,建立了水力空化防除垢实验测试平台,并以加热器和铜片试件为结垢表面进行了实验研究。采用显微放大摄影系统详细观测了水力空化防除垢现象与效果,系统研究了液体流量对防垢效果及积垢沉积的影响规律。研究结果表明:水力空化作用能使溶液中的成垢物质细化、破碎,减小垢层与试件表面的附着力并且将已有垢层粉碎、破坏;存在最佳的溶液流量使试件表面的防垢率达到最大,而积垢脱除速率随着流量的增大而降低。
In this paper, the experimental platform for the test of the antiscale and scale removal by hydrodynamic cavitation was set up, which aimed at the begriming of the heat exchanger and energy waste. The corresponding research on this platform was carried out by regarding heater and sheet copper as scaling surface. The system of micro-amplification was applied to observe the effects and phenomena of antiscale and scale removal by hydrodynamic cavitation. The influence of fluid flow rate on the antiscale and scale deposition was also studied systematically. The results indicate that, hydrodynamic cavitation can break the scale material and reduce the adhesive force between the scale layer and the testing surface, and the existing scale layer can be also broken and destroyed. There is an optimal fluid flow rate which makes the scale inhibiting efficiency reach the maximum, but the scale removal rate decreases with the increase of the fluid flow rate.
出处
《工程热物理学报》
EI
CAS
CSCD
北大核心
2010年第9期1531-1534,共4页
Journal of Engineering Thermophysics
基金
国家863计划项目(No.2006AA05Z203)
国家自然科学基金项目(No.50806078)
关键词
水力空化
防垢
除垢
hydrodynamic cavitation
antiscale
scale removal
