| 水平弯管内硫沉积数值模拟研究 |
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| 引用本文： | 陈磊,李长俊,季楚凌.水平弯管内硫沉积数值模拟研究[J].中国安全生产科学技术,2015,11(2):28-35. |
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| 作者姓名： | 陈磊 李长俊 季楚凌 |
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| 作者单位： | （西南石油大学 石油与天然气工程学院，四川 成都610500） |
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| 摘 要： | 元素硫在集输管道中沉积会引起堵塞和腐蚀问题，而弯管是集输管道中较易出现硫沉积的部位之一。为此，采用数值模拟的方法研究水平弯管内的硫沉积问题，首先利用雷诺应力模型对流场进行模拟，其次采用Lagrange颗粒轨道模型对硫颗粒进行模拟追踪，研究不同因素对硫颗粒在弯管中沉积率的影响。结果表明:弯管内壁会出现负压区和低速区，气流速度和弯曲比会对流场产生影响；硫颗粒在弯管中的沉积率随流速、粒径和弯曲比的增大而增大；硫颗粒沉积是重力和离心力共同作用的结果，其中离心力是导致弯管中沉积率增大的重要原因。
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| 关 键 词： | 水平弯管 硫沉积 数值模拟 沉积率 流速 粒径 弯曲比 |
Study on numerical simulation of sulfur deposition in horizontal bend |
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| CHEN Lei,LI Chang-jun,JI Chu-ling.Study on numerical simulation of sulfur deposition in horizontal bend[J].Journal of Safety Science and Technology,2015,11(2):28-35. |
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| Authors: | CHEN Lei LI Chang-jun JI Chu-ling |
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| Affiliation: | （School of Petroleum Engineering, Southwest Petroleum University, Chengdu Sichuan 610500, China） |
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| Abstract: | The deposition of elemental sulfur in gathering pipeline will cause the problems of clogging and corrosion, and sulfur deposition is more prone to occur in the bend. For this reason, the method of numerical simulation was used to study the sulfur deposition in horizontal bend. Firstly, the Reynolds stress model was used to simulate the flow field. Secondly, the Lagrange particle trajectory model was used to track the sulfur particles. Then the factors affecting the deposition rate of sulfur particles in bend were studied. The results showed that the negative pressure zone and low velocity zone would appear on the inner wall of bend. The gas velocity and curvature ratio would affect the flow field. The deposition rate of sulfur particles in bend would increase with the increase of velocity, particle size and curvature ratio. Sulfur particle deposition was the result by the combined effect of gravity and centrifugal force, and the centrifugal force was an important cause of the increased deposition rate in bend. |
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| Keywords: | horizontal bend sulfur deposition numerical simulation deposition rate velocity particle size curvature ratio |
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