天然气加热炉防腐防垢技术探讨
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摘要
加热炉内水通常来自于地下,常含有引起加热炉腐蚀的物质,影响着加热炉的平稳安全运行。通过对某天然气集气站加热炉用水及炉内壁物质分析,得到运行一段时间后水质变化以及腐蚀与结垢产物的化学组成,进一步探究了加热炉材料、氧、CO_2、溶解盐、闭塞电池对加热炉腐蚀与结垢的影响机理。结果表明:不同加热炉材料的腐蚀速率相差不大,炉内腐蚀主要由运行温度下水、氧、CO_2、溶解盐、闭塞电池引起的。在分析腐蚀结垢机理的基础上提出了防腐防垢的具体措施以及炉内清洗的工序,介绍了清洗评价标准,可为其他天然气企业加热炉防腐防垢提供参考。
The water in heating furnace usually comes from underground water. It often contains substances that cause the corrosion of the heating furnace, affecting the smooth and safe operation of the heating furnace. By the analysis of heating furnace water and internal wall materials of a natural gas gathering station, the chemical composition of the water quality changes and the products of corrosion and scaling after running for a period of time were explored. The effects of the heating furnace material, oxygen, CO_2, dissolved salt and block battery on the corrosion and scaling mechanism of the heating furnace were explored. The results show that the corrosion rate of different heating furnace material has little difference. The corrosion in furnace is mainly caused by water, oxygen, CO_2, dissolved salt and block battery at running temperature. On the basis of this conclusion, the concrete measures for anticorrosion and anti scaling and the process of cleaning in the furnace are put forward,and the evaluation standards of the cleaning are introduced, which can be used for the references for the corrosion and anti scaling of other natural gas enterprises.
The water in heating furnace usually comes from underground water. It often contains substances that cause the corrosion of the heating furnace, affecting the smooth and safe operation of the heating furnace. By the analysis of heating furnace water and internal wall materials of a natural gas gathering station, the chemical composition of the water quality changes and the products of corrosion and scaling after running for a period of time were explored. The effects of the heating furnace material, oxygen, CO_2, dissolved salt and block battery on the corrosion and scaling mechanism of the heating furnace were explored. The results show that the corrosion rate of different heating furnace material has little difference. The corrosion in furnace is mainly caused by water, oxygen, CO_2, dissolved salt and block battery at running temperature. On the basis of this conclusion, the concrete measures for anticorrosion and anti scaling and the process of cleaning in the furnace are put forward,and the evaluation standards of the cleaning are introduced, which can be used for the references for the corrosion and anti scaling of other natural gas enterprises.
引文
[1]郭韵,曹伟武,严平,等.天然气加热炉的发展现状与改进探索[J].天然气工业,2009,29(12):97-100.
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[4]宋彬,陈佳.气田天然气加热炉类型选择[J].油气田地面工程,2007,26(3):59-59.
[5] Cao H L.Application of Atmospheric gas furnace in small oil and gas field enterprise[J].Value Engineering,2012(19).
[6]杨志刚,张宁生,吴新民,等.天然气加热炉清洗与缓蚀阻垢技术研究(Ⅰ)-清洗与钝化[J].天然气工业,2005,25(4):160-163.
[7]张园,李稳宏,胡兴民,等.天然气加热炉腐蚀机理及其防护研究[J].腐蚀科学与防护技术,2009,21(3):327-329.
[8]林雪梅.气田腐蚀与防腐技术[J].天然气与石油,1995(3):45-54.
[9] Huang Y H, Zhang T C.Effects of dissolved oxygen on formation of corrosion products and concomitant oxygen and nitrate reduction in zero-valent iron systems with or without aqueous Fe2+[J].Water Research,2005,39(9):1751-1760.
[10]沈羚.低压热水锅炉氧腐蚀及其预防措施[J].质量天地,2003(7):63-63.
[11]杨志刚,王长宁,刘立,等.天然气加热炉腐蚀机理及影响因素[J].石油化工腐蚀与防护,2007,24(6):37-39.
[12]郑家燊,吕战鹏.二氧化碳腐蚀机理及影响因素[J].石油学报,1995,16(3):134-139.
[13] Kermani M B, Morshed A B.Carbon dioxide corrosion in oil and gas productionA compendium[J].Corrosion,2003,59(8):659-683.
[14] Zhang J, Wang X, Xie J, et al.Research on critical pH value of blocked area in simulated crevice Corrosion e Environment[J].Hot Working Technology,2017(5):45-79.
[15]许淳淳,傅晓萍,刘幼平.几种无机阴离子的电迁移及其对闭塞区的影响[J].腐蚀科学与防护技术,2000,12(3):130-133.
[16]刘幼平.蚀孔、缝隙及裂缝内的闭塞电池腐蚀行为及其控制方法———(Ⅰ)闭塞电池腐蚀理论、研究方法及微区环境效应[J].腐蚀与防护,1995(3):153-158.
[2] Karthikeyan M, Mathew S, Shamasundar B A, et al.Handbook of natural gas transmission and processing[J].Elsevier Ltd Oxford,2006,7(4):89-93.
[3]郭韵,曹伟武,严平,等.天然气加热炉结构及其传热特性分析[J].上海理工大学学报,2009,31(3):251-254.
[4]宋彬,陈佳.气田天然气加热炉类型选择[J].油气田地面工程,2007,26(3):59-59.
[5] Cao H L.Application of Atmospheric gas furnace in small oil and gas field enterprise[J].Value Engineering,2012(19).
[6]杨志刚,张宁生,吴新民,等.天然气加热炉清洗与缓蚀阻垢技术研究(Ⅰ)-清洗与钝化[J].天然气工业,2005,25(4):160-163.
[7]张园,李稳宏,胡兴民,等.天然气加热炉腐蚀机理及其防护研究[J].腐蚀科学与防护技术,2009,21(3):327-329.
[8]林雪梅.气田腐蚀与防腐技术[J].天然气与石油,1995(3):45-54.
[9] Huang Y H, Zhang T C.Effects of dissolved oxygen on formation of corrosion products and concomitant oxygen and nitrate reduction in zero-valent iron systems with or without aqueous Fe2+[J].Water Research,2005,39(9):1751-1760.
[10]沈羚.低压热水锅炉氧腐蚀及其预防措施[J].质量天地,2003(7):63-63.
[11]杨志刚,王长宁,刘立,等.天然气加热炉腐蚀机理及影响因素[J].石油化工腐蚀与防护,2007,24(6):37-39.
[12]郑家燊,吕战鹏.二氧化碳腐蚀机理及影响因素[J].石油学报,1995,16(3):134-139.
[13] Kermani M B, Morshed A B.Carbon dioxide corrosion in oil and gas productionA compendium[J].Corrosion,2003,59(8):659-683.
[14] Zhang J, Wang X, Xie J, et al.Research on critical pH value of blocked area in simulated crevice Corrosion e Environment[J].Hot Working Technology,2017(5):45-79.
[15]许淳淳,傅晓萍,刘幼平.几种无机阴离子的电迁移及其对闭塞区的影响[J].腐蚀科学与防护技术,2000,12(3):130-133.
[16]刘幼平.蚀孔、缝隙及裂缝内的闭塞电池腐蚀行为及其控制方法———(Ⅰ)闭塞电池腐蚀理论、研究方法及微区环境效应[J].腐蚀与防护,1995(3):153-158.