高含硫气田开发酸污对天然气净化厂输电线路安全影响研究及防护措施优选

基于高含硫气田开发过程中的天然气净化厂尾气排放特性及在大气中浓度分布的预测,以普光气田为例,就酸性气体对220kV线路绝缘性能分析,分别测试了模拟酸雾环境中污秽绝缘子以及空气的绝缘性能。结果表明,在盐雾的作用下,绝缘子的闪络电压下降了约20%,雾的pH值为3时,空气的绝缘强度下降了约15.1%,pH值等于3的酸雾与II级空气污染相结合,空气的绝缘强度大约下降了23.2%。在pH值等于3的酸雨酸雾环境下,线路的耐雷水平下降了约20%。结合实验室分析结果和普光气田的实际情况,分析了酸性气田输电线路的防护措施。

Optimization of protective measures and safety impact study of high sulfur gas field acid pollution on the electric transmission line of natural gas purification plant

Based on the gas emission characteristics of natural gas purification plant and con- centration distribution prediction in atmosphere during the development process of high sour gas filed, insulation performance analysis of acid gases on the 220 kV line was conducted, taking Pu- guang gas field as example. Insulating property of polluted insulator and the air under simulated acid mist environment were measured respectively. The results showed that flashover voltage of insulator dropped about 20% under the action of salt mist. Insulating strength of the air dropped about 15.1% when the pH value of mist was 3. After the combination of acid mist （pH=3） and class II air pollution, insulating strength of the air dropped about 23.2G. Lightning withstand level of electric transmission line decreased 20 % approximately under acid rain and acid mist envi- ronment with pH value of 3. Combined the laboratory analysis results and practical situation in Puguang gas field, the protective measures of electric transmission line in acid gas field were ana- lyzed.