高含硫天然气过滤单元性能优化

发布时间：2018-05-03 07:34

本文选题：高含硫天然气 + 脱硫　；参考：《天然气工业》2016年03期

【摘要】：为了避免高含硫天然气湿气输送过程中所夹带的固体颗粒和液体杂质对天然气净化装置和效果的不良影响,在脱硫工艺前端设置了由预过滤器和聚结过滤器所组成的两级过滤单元。针对某高含硫天然气净化厂原料气过滤单元存在的聚结过滤器滤芯压降不上升、无法通过压降来判断滤芯更换时间等问题,利用两级过滤性能评价系统对比了不同过滤性能预过滤器滤芯和聚结过滤器滤芯组合的过滤性能,发现其原因在于聚结过滤器滤芯对亚微米级液滴的聚结性能不理想、预过滤器滤芯和聚结过滤器滤芯的性能不匹配。为此,提出了改进措施:①改进聚结过滤器滤芯的聚结层;②设置疏油型排液层,改变预过滤器滤芯的结构参数,使之与改进后的聚结过滤器滤芯的性能相匹配。实验结果表明:改进后聚结过滤器滤芯的稳态压降较在用滤芯降低75%,对于粒径为0.3μm及以上的液滴过滤效率达到99.99%,同时实现了预过滤器滤芯和聚结过滤器滤芯压降的同步变化。现场试验结果表明:改进后的原料气过滤单元对液体杂质的过滤能力提高了1倍,能更有效地保证后续工艺的安全运行。该研究成果为高含硫天然气过滤元件设计和过滤系统优化运行提供了参考。
[Abstract]:In order to avoid the adverse effects of solid particles and liquid impurities entrained in the wet gas transportation process of high-sulfur natural gas on the natural gas purification unit and effect, A two-stage filter unit composed of pre-filter and coalescence filter is arranged at the front end of desulfurization process. In view of the problem that the pressure drop of the coalescence filter core does not rise in the feedstock gas filter unit of a high sulfur natural gas purification plant, it is impossible to judge the replacement time of the filter element by the pressure drop. A two-stage filter performance evaluation system is used to compare the filtration performance of different filter elements and coalescence filter elements. It is found that the reason is that the coalescence performance of the coalescence filter core is not ideal for sub-micron droplets. The performance of the pre-filter filter and the coalescence filter filter does not match. For this reason, the improvement measure 1: 1 is put forward to improve the coalescence layer of the coalescence filter element and the oil-sparking drainage layer is set up. The structure parameters of the pre-filter are changed to match the performance of the improved coalescence filter core. The experimental results show that the steady-state pressure drop of the improved coalescence filter is 75 lower than that of the current filter, and the filtration efficiency of the droplet with diameter of 0.3 渭 m and above is 99.9999. The pressure drop of the filter core and the filter core of the coalescence filter are changed synchronously. The field test results show that the filtration ability of the improved feedstock gas filter unit for liquid impurities is doubled, and the safe operation of the subsequent process can be ensured more effectively. The research results provide a reference for the design of high-sulfur natural gas filter elements and the optimal operation of the filtration system.
【作者单位】：中国石油大学(北京)机械与储运工程学院;过程流体过滤与分离技术北京市重点实验室;中国石油大学(北京)化学工程学院;
【基金】：国家科技重大专项“百亿方级净化厂安全运行技术优化”(编号:2011ZX05017-005) 国家自然科学基金项目“天然气净化用气液聚结滤芯过滤分离机理研究”(编号:51376196)
【分类号】：TE644

【相似文献】