克劳斯工艺防腐蚀涂层数值模拟

doi:10.16085/j.issn.1000-6613.2021-1180

化工进展 ›› 2021, Vol. 40 ›› Issue (S2): 327-333.DOI: 10.16085/j.issn.1000-6613.2021-1180

克劳斯工艺防腐蚀涂层数值模拟

张立胜¹(), 黄山², 刘师承², 周屈兰²(), 裴爱霞¹, 李娜²

^1.中国石油化工集团有限公司中原油田分公司，河南濮阳 457000
^2.西安交通大学动力工程多相流国家重点实验室，陕西西安 710049

收稿日期:2021-06-03 修回日期:2021-07-06 出版日期:2021-11-12 发布日期:2021-11-12
通讯作者: 周屈兰
作者简介:张立胜（1982—），男，硕士研究生，研究方向为洁净燃烧技术、锅炉烟气净化技术。E-mail：zls198201@163.com。
基金资助:
国家科技重大专项(2016ZX05017-006-HZ02)

Numerical simulation study on anti-corrosion coating of Claus process

ZHANG Lisheng¹(), HUANG Shan², LIU Shicheng², ZHOU Qulan²(), PEI Aixia¹, LI Na²

^1.Sinopec Zhongyuan Oilfield Institute of Petroleum Engineering, Puyang 457000, Henan, China
^2.State Key Laboratory of Multiphase Flow in Power Engineering, Xi’an Jiaotong University, Xi’an 710049, Shaanxi, China

Received:2021-06-03 Revised:2021-07-06 Online:2021-11-12 Published:2021-11-12
Contact: ZHOU Qulan

摘要/Abstract

摘要：

燃料、烟气中的高浓度硫化氢以及液滴对克劳斯工艺中燃烧设备有严重的腐蚀和冲蚀作用，很容易引发大型生产安全事故。液滴的冲蚀在金属受热面壁面产生细微裂纹是化学腐蚀的起点。涂层能够防止化学腐蚀，本文通过建立数学模型准确描述了克劳斯硫黄回收工艺中液滴撞击防腐蚀涂层的过程，运用离散迭代方法对整个计算区域进行求解，得到了撞击过程中防腐蚀涂层内部、涂层与固体黏结面以及固体内部的应力分布，确认了涂层方案能够在克劳斯硫黄回收工艺中解决金属受热面液滴冲蚀的问题；同时研究了不同厚度的涂层对应力分布的影响，得出了量纲为1最大应力与撞击速度之间的经验公式，提出采用20μm厚的氮化硅涂层是经济高效的克劳斯工艺壁面保护措施。

关键词: 表面, 克劳斯工艺, 界面, 离散迭代方法, 腐蚀, 防腐蚀涂层

Abstract:

The high concentration of hydrogen sulfide in fuel and flue gas and liquid droplets have serious corrosion and erosion effects on the combustion equipment in Claus process, which is easy to cause large-scale production safety accidents. The erosion of the droplet results in fine cracks on the wall surface of the metal heating surface, which is also the starting point of chemical corrosion. Coating can prevent chemical corrosion, this article through the establishment of mathematical model accurately describes the claus sulfur recovery process of droplet impact anti-corrosion coating process, using the discrete iteration method to solve the whole calculation domain, got hit in the process of internal anti-corrosion coating, coating and solid bonding surface and the stress distribution within the solid, confirmed the coating solution can solve the heating surface of metal droplet in the claus sulfur recovery process of erosion problems. At the same time, the effect of different thickness of coating on stress distribution was studied, and it was suggested that 20μm thickness of Si₃N₄ coating was an economical and efficient wall protection measure.

Key words: surface, Claus process, interface, discrete ordinate method, corrosion, anticorrosive coatin

中图分类号:

TB304

张立胜, 黄山, 刘师承, 周屈兰, 裴爱霞, 李娜. 克劳斯工艺防腐蚀涂层数值模拟[J]. 化工进展, 2021, 40(S2): 327-333.

ZHANG Lisheng, HUANG Shan, LIU Shicheng, ZHOU Qulan, PEI Aixia, LI Na. Numerical simulation study on anti-corrosion coating of Claus process[J]. Chemical Industry and Engineering Progress, 2021, 40(S2): 327-333.

图/表 9

图 1 液固撞击物理过程的示意图

图2 液固撞击问题的坐标轴设置

图3 液体内部的瞬时压强和固体内部的瞬时应力分布

图4 有涂层时液体内部瞬时的压强和固体内部应力分布

图5 液固撞击结果对比图（不同涂层厚度）

图6 固体内部最大应力随时间的变化（不同涂层厚度对比）

表1 拟合常数的计算结果

涂层	固体内部		固体和涂层黏结面
涂层	m	n	m	n
无涂层	8.495325	0.41968	—	—
5μm涂层	3.253719	0.31144	20.15162	0.55543
10μm涂层	3.48835	0.36927	15.50172	0.58567
20μm涂层	6.865624	0.72015	12.32367	0.68702
40μm涂层	4.543913	0.58938	6.561755	0.53313

图7 固体与涂层黏结面最大应力与撞击马赫数的关系

图8 固体内部最大应力与撞击马赫数的关系

参考文献 13

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克劳斯工艺防腐蚀涂层数值模拟

Numerical simulation study on anti-corrosion coating of Claus process

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