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1.
本文分析管垢的形成原因,管垢的危害,管垢的防治方法。  相似文献   

2.
超声波抑制积垢的影响因素与作用原理的研究   总被引:2,自引:0,他引:2  
通过静态抑垢实验,研究了积垢溶液中[Ca2+]和[Mg2+]总浓度,溶液的pH值对超声抑垢的影响,得出超声抑垢的适宜条件;引进抑垢曲线新概念,直观地描述超声抑垢的效果,并从抑垢静态、动态实验得到验证;同时研究了超声波对溶液的电导率,表面张力的影响.最后,探讨了超声波的抑垢机理,为超声防垢的实际应用提供一定的理论依据.  相似文献   

3.
本文介绍了轻垢型液体洗涤剂的生产工艺和生产配方,通过实验,确定了轻垢型液体洗涤剂的生产工艺和配方,使生产的轻垢型液体洗涤剂具有使用安全性高、贮存期长、产品质量好、价格低等优点。  相似文献   

4.
以丙烯酸、聚乙二醇单甲醚(分子量为400,1000)丙烯酸酯为原料,合成了两种含膦酰基醚基羧基的共聚物阻垢荆T-400和T-1000,以静态阻垢方法分别从阻垢剂用量、钙离子浓度、阻垢时间、阻垢温度及溶液pH值考察了侧链聚醚聚合度不同的两种阻垢剂对阻碳酸钙垢、硫酸钙垢性能的影响差异.结果表明,T-400、T-1000两种共聚物阻垢剂具有优良的阻碳酸钙垢性能和优异的阻硫酸钙垢性能;共聚物用量为12mg/L时,侧链聚醚聚合度小的共聚物T-400阻碳酸钙垢性能优于T-1000;共聚物用量为4mg/L时,侧链聚醚聚合度大的共聚物T-1000阻硫酸钙垢性能优于T-400.  相似文献   

5.
新型水处理剂EDDAP阻垢性能的研究(Ⅰ)   总被引:2,自引:1,他引:2  
本文对合成产物-新型水处理剂乙二胺-N,N′-二乙酸-二甲叉膦酸(EDDAP)阻碳酸钙垢的性能进行了研究,结果表明,EDDAP在阻碳酸钙垢性能方面明显优于HEDP。  相似文献   

6.
本文对合成产物--新型水处理剂乙二胺-N,N'-二乙酸-二甲叉膦酸(EDDAP)阻碳酸钙垢的性能进行了研究.结果表明,EDDAP在阻碳酸钙垢性能方面明显优于HEDP.  相似文献   

7.
新型水处理剂EDDAP阻垢性能的研究(Ⅱ)   总被引:2,自引:0,他引:2  
本文对合成产物-新型水处理剂乙二胺-N,N′-二乙酸-二甲叉膦酸(EDDAP)阻磷酸钙垢的性能进行了研究。结果表明,EDDAP具有优异的阻磷酸钙垢性能,且明显优于羟基乙叉二膦酸(HEDP)。  相似文献   

8.
三元复合驱中的"三元"指的是聚合物、表面活性剂和碱三种化学剂。该方法可以比水驱提高采收率20%左右,目前在大庆油田正处于工业推广应用阶段。但由于注入体系中碱的加入会使注入、采出系统出现结垢情况,造成垢堵、垢卡等故障,严重影响生产。阐述了三元复合驱油井的结垢规律、结垢故障现象及处理方法,并结合大庆油田矿场试验情况介绍了有效的清垢、防垢方法。以期为一线技术管理人员提供参考。  相似文献   

9.
本文对合成产物--新型水处理剂乙二胺-N,N'-二乙酸-二甲叉膦酸(EDDAP)阻磷酸钙垢的性能进行了研究.结果表明,EDDAP具有优异的阻磷酸钙垢性能,且明显优于羟基乙叉二膦酸(HEDP).  相似文献   

10.
阐述了常见化学防垢荆的类型、性能及研究应用现状,针对现有化学防垢剂的防垢特点,作者特别指出了一种新型的防垢剂——纳米诱垢剂,该防垢剂可有效地应用于油田水处理中,特别对于油田水中的硫酸钡/锶垢具有很好的防垢效果,并指出了化学防垢剂今后的工作重点和发展方向。  相似文献   

11.
Simulation investigation on fluid characteristics of the water hydraulic jet pipe servo valve (WHJPSV) is conducted through a commercial computational fluid dynamics (CFD) software package FLUENT. In particular, the factors to fluid characteristics of WHJPSV are addressed, which include diameter combination of jet pipe and receiver pipe, jet pipe nozzle clearance, angle between two jet receiver pipes and deflection angle of the jet pipe. It is concluded from the results that: (i) Structural parameters have ...  相似文献   

12.
污水管网是污水收集和集中处理的关键,大多数城市均建有污水处理厂,由于受城市建设、经济条件和管理方式的制约,配套活污水收集管网及泵站建设相对滞后,污水接入单位没有与污水干管建设实现同步,致使污水收集率偏低。目前存在大量污水管网的改造建设,其管理中存在的问题是我们必须面对和思考的。  相似文献   

13.
This paper focuses on the heat transfer performance of semi-open heat pipe which is a new type of heat pipe. After analyzing its condensation heat transfer mechanisms theoretically, several semi-open heat pipes in different length ratios and upper hole diameters are studied experimentally and compared with the same dimensions closed heat pipes. Experimental results show that the heat transfer performance of semi-open heat pipe becomes better by increasing heat transfer rate. At the first transitional point, the heat transfer performance of semi-open heat pipe approaches the level of the closed heat pipe. It is suitable to choose upper small hole about 1 mm in diameter and length ratio larger than 0.6 for the semi-open heat pipe.  相似文献   

14.
不锈钢光纤束管的焊接质量影响光缆的使用性能,利用涡流擦伤法检测不锈钢光纤束管焊接质量,可以有效的检测、监控不锈钢光纤束管;介绍了涡流法在线检测不锈钢光纤束管时几个重要参数的确定以及确定这些参数所采用的一般方法。  相似文献   

15.
管道绝热施工是建筑设备工程施工中的重要内容,选择适用的保温材料,采用科学的施工方法,完善管道的保温结构是管道绝热施工的三个关键环节。  相似文献   

16.
将热管系统的蒸发器作为连铸结晶器,通过测试蒸发室及熔融室内的温度,揭示热管运行温度和熔融室温度的关系。结果表明:在普通环境温度下和物质熔融温度为160℃时.热管工作温度为50-70℃,热管系统蒸发器面积和冷凝器面积之比从1:15增加到1:30时。热管工作温度降低较快,下降约23%;当面积比从1:30增加到1:60时,下降约8%:将热管系统运用于连铸生产时.增大热管系统的冷凝器面积,可以降低热管工作温度。但降低程度随面积比的增大而减小;当用于镁合金连铸时,热管的运行温度将超过100℃.  相似文献   

17.
Separate type heat pipe heat exchangers are often used for large-scale heat exchanging. The arrangement of such a heat exchanger conveniently allows heat input to and output from the heat exchanger at remote locations. The traditional method of designing an ordinary HPHE (heat pipe heat exchanger) is commonly applied in the separate type exchanger design, but the calculations have to be carried out separately, which makes it very complicated. In this work, the ε-NTU (effectiveness-Number of Transfer Units) method was applied for optimization analysis of single-or multi-level separate type heat pipe heat exchangers. An optimizing formula for single-level separate type heat pipe heat exchangers was obtained. The optimizing principles of effectiveness-NTU and heat transfer rate by the equal distribution method for multi-level separate type heat pipe heat exchanger are presented. The design of separate type heat pipe heat exchangers by the optimizing method is more convenient and faster than by the traditional method.  相似文献   

18.
With von Mises yield criterion, the loading range of Net Section Collapse (NSC) Criteria is extended from combined tension and bending loadings to combined bending, torsion and internal pressure loadings. A new theoretical analyzing method of plastic limit load for pressure pipe with incomplete welding defects based on the extended NSC Criteria is presented and the correlative formulas are deduced, the influences of pipe curvature, circumferential length and depth of incomplete welding defects on the plastic limit load of pressure pipe are considered as well in this method. Meanwhile, according to the orthogonal experimental design method, the plastic limit loads are calculated by the finite element method and compared with the theoretical values. The results show that the expressions of plastic limit load of pressure pipe with incomplete welding defects under bending, torsion and internal pressure based on extended NSC criteria are reliable. The study provides an important theoretical basis for the establishment of safety assessment measure towards pressure pipe with incomplete welding defects.  相似文献   

19.
考虑电厂管路阀门的实际需要 ,用概率方法分析了单路、双路和三路并联或串并联管路的运行可靠度 ,并提供了详实数据 ,可供电厂设计改造管路阀门时参考。  相似文献   

20.
流量分配管在许多化工设备流量的均匀分配中应用十分广泛。本文运用总体衡算法的方法,对流量进行近似分析,通过举例说明,得到了简明而有用的结果,并对管内流量变化时的摩擦阻力进行了研究,研究结果将利于更深刻理解和更好运用流量分配管。  相似文献   

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