微电解技术对调相机站循环冷却水降垢杀菌作用的试验研究

采用微电解方法处理调相机站循环冷却水,研究了微电解电流密度和水力停留时间对冷却水硬度和杀菌效果的影响。结果表明,水质硬度去除率与微电解电流密度和水力停留时间正相关。在电流密度为0.1 mA/cm^(2)的条件下,当水力停留时间从10 min增加到20 min时,循环水硬度去除率从1.39%提高到2.77%。在水力停留时间为10 min的条件下,当电流密度从0.02 mA/cm^(2)增加到0.3 mA/cm^(2)时,循环水硬度去除率从0.2%提高到6.9%。当水力停留时间为15 min,电流密度达到0.43 mA/cm^(2)时,杀菌率达到99.55%。试验表明延长水力停留时间或者增加电流密度,杀菌效果相应地随之增强。在实际工业应用中,可以根据实际需要来调节加在电极上的电流、电压及水样在装置中的水力停留时间,以达到合适的水质硬度去除率和杀菌效果。

聚驱抽油杆下行滞后井酸洗降黏除垢技术研究

大庆油田聚驱井出现严重的抽油杆下行滞后现象,主要原因为采出井聚合物黏度高及井壁结垢。研制出一种酸洗降黏除垢剂,可有效处理采出井井下滞后物质,复配酸氨基磺酸与盐酸最佳浓度比为4∶1时,降黏除垢效果较好;选用缓蚀剂CY-1在0.10%浓度下的缓蚀效率最高可达69.1%,且稳定性相对较好,具有一定的现场应用价值。

锅炉水磷酸盐处理法的进展

系统地介绍锅炉水磷酸盐处理各种控制方法的原理及其适用范围，指出平衡磷酸盐处理方法是目前高参数锅炉合适的磷酸盐处理方法，并做了一定探讨，特别对“暂时消失”现象及其热力学模型作出了详尽说明．

Experimental study on fouling characteristics and influence factors of spiral-grooved tube

In this paper,we carried out a series of experiments on fouling characteristics of 6 kinds of spiral-grooved tubes to investigate the impact of hardness,temperature and structure parameters of cold water on fouling characteristics of spiral-grooved tube.Experimental results showed that when cold-water temperature decreased,fouling resistance of spiral-grooved tube also decreased.Asymptotic fouling resistance increased accompanied with increase of cold-water hardness.However,the asymptotic fouling resistance appeared to reduce when hardness increased to some extent.Geometric parameters of spiral-grooved tubes had remarkable effect on fouling resistance,which showed a tendency of decrease with increase of groove depth and decrease of pitch.In this study,the minimum asymptotic fouling resistance was observed in the spiral-grooved tube with small pitch and large groove depth.