| 引用本文: | 高振军,刘 海,戴 盛,等.微渗结构预防结晶的试验研究[J].灌溉排水学报,2025,44(5):40-46. |
| GAO Zhenjun,LIU Hai,DAI Sheng,et al.微渗结构预防结晶的试验研究[J].灌溉排水学报,2025,44(5):40-46. |
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| 摘要: |
| 【目的】研究微渗结构预防结晶的规律，分析微渗结构的作用机理。【方法】设计并搭建基于微渗结构的试验平台，进行静态和动态结晶试验，分析微渗结构的微渗特性，研究在静态、动态条件下微渗速率对管道壁面结晶的影响。【结果】在静态结晶试验中，通过设置不同水头来控制微渗速率，随着水头的增加，管道壁面结晶的出现时间显著延长，结晶质量明显减少；微渗特性试验表明溶液通过微渗结构渗出，在管道近壁面区域形成微润水层，水层厚度随着水头高度的增加而变厚。在动态结晶试验中，普通管壁面结晶量较多；逐渐增大微润管二侧压力差，发现微润管壁面结晶质量逐渐减少，在二侧压力差足够大时，微润管壁面基本无结晶出现。【结论】本文提出的微渗结构通过在管道壁面形成稀释层，能够有效地预防管道壁面结晶。 |
| 关键词: 微渗结构；管道结晶；卤水输送系统；试验研究 |
| DOI：10.13522/j.cnki.ggps.2024401 |
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| Using micro-seepage structures to mitigate salt crystallization in brine transport systems |
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GAO Zhenjun, LIU Hai, DAI Sheng, REN Jian, LI Hao, ZHOU Xiumei,
OYBEK Ishnazarov, ZHANG Lisheng, ZHANG Jianbo
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1. Hubei International Scientific and Technological Cooperation Base of Intelligent Fluid Engineering and Equipment,
Three Gorges University, Yichang 443000, China; 2. Zhenjiang Water Works Co., Ltd, Zhenjiang 212000, China;
3. Farmland Irrigation Research Institute of Chinese Academy of Agricultural Sciences, Xinxiang 453000, China;
4. Institute of Energy Problems, Academy of Sciences of the Republic of Uzbekistan, Tashkent 100000, Uzbekistan
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| Abstract: |
| 【Background and Objective】Brine, a high-salinity water body with a mineralization degree greater than 50 g/L, is rich in various chemical elements and holds significant developmental potential. In agriculture, brine can be used for soil improvement, water-saving irrigation, and fertilizer production. However, during the collection and transportation of brine, salt crystallization often occurs, particularly on the pipe walls. Factors such as temperature, flow rate, and surface roughness contribute to salt crystal deposition, reducing transportation efficiency and severely impacting the stability of irrigation systems. This paper proposes a physical method for preventing crystallization based on micro-seepage structures.【Method】An experimental platform based on micro-seepage structures was designed and constructed to conduct both static and dynamic crystallization experiments. Measured data were used to analyze the micro-seepage characteristics of the structures and assess the impact of different micro-seepage rates on crystallization on the pipe wall under both static and dynamic conditions. 【Result】Under static conditions, varying water head can be used to control the micro-seepage rate. Increasing the water head significantly delayed the onset of crystallization on the pipe wall and reduced the amount of crystallization. Micro-seepage experiment showed that the solution could seep through the micro-seepage structure, forming a micro-wetting layer near the pipe wall. The thickness of this layer increased as the micro-seepage rate increased. Under dynamic flow conditions, crystallization on the pipe walls was significantly greater. However, when the micro-seepage pipe was used, increasing the pressure difference across the pipe reduced the crystallization mass on the wall. When the pressure difference was sufficiently large, no crystallization was observed on the wall.【Conclusion】The micro-seepage structure proposed in this paper effectively prevents crystallization on the pipe wall by forming a dilution layer on the wall surface. |
| Key words: micro-seepage structure; pipeline crystallization; brine transport system; experimental research |
