引用本文:马枭,吴明鸥,罗元,马悦,肖乐,柳卓君,等. 低负荷下双塔分子筛脱水工艺对产品天然气中H2S含量的影响[J]. 石油与天然气化工, 2019, 48(6): 7-12.
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低负荷下双塔分子筛脱水工艺对产品天然气中H2S含量的影响
马枭1,2,3,吴明鸥2,3,罗元4,马悦4,肖乐5,柳卓君6,唐晓东1
1.西南石油大学化学化工学院;2.中国石油西南油气田公司天然气研究院 ;3. 国家能源高含硫气藏开采研发中心;4.中国石油西南油气田公司川西北气矿 ;5.中国石油工程建设有限公司西南分公司;6.中国石油西南油气田公司川东北作业分公司
摘要:
中国石油西南油气田公司川西北气矿天然气净化厂脱水装置采用分子筛吸附脱水双塔工艺,一塔吸附,一塔再生,二者切换使用。在低负荷运行状态下,分子筛塔进行再生时,其产品气中H2S含量出现周期性波动情况,存在超标的潜在风险。经过研究与分析制定了优化调整方案,通过延长吸附再生切换周期、减少再生时间、降低再生温度等操作后,分子筛脱水装置再生时产品气中H2S质量浓度降至10 mg/m3以下,并趋于平稳,较好地解决了这一生产异常问题。 
关键词:  分子筛  脱水  湿气再生  双塔  低负荷  波动
DOI：10.3969/j.issn.1007-3426.2019.06.002
分类号:
基金项目:中国石油天然气股份有限公司重大科技专项“西南油气田天然气上产300亿立方米关键技术研究与应用——四川盆地气田开发地面系统安全清洁高效运行关键技术研究与应用”(2016E-0610)
Effect of two-tower molecular sieve dehydration technology on natural gas purity under low load
Ma Xiao1,2,3, Wu Mingou2,3, Luo Yuan4, Ma Yue4, Xiao Le5, Liu Zhuojun6, Tang Xiaodong1
1. College of Chemistry and Chemical Engineering, Southwest Petroleum University, Chengdu, Sichuan, China;2. Research Institute of Natural Gas Technology, PetroChina Southwest Oil & Gasfield Company, Chengdu, Sichuan, China;3. Natinal Energy R&D Center of High-Sulfur Gas Exploition, Chengdu, China;4. Northwest Sichuan Gas District, PetroChina Southwest Oil & Gasfield Company, Jiangyou, Sichuan, China;5. China Petroleum Engineering & Construction Corporation Southwest Company, Chengdu, Sichuan, China;6. PetroChina Southwest Oil & Gasfield Company CDB Operating Company, Chengdu, Sichuan, China
Abstract:
The molecular sieve adsorption dehydration two-tower process is adopted on dehydration unit of Natural Gas Purification Plant, Northwest Sichuan Gas District, PetroChina Southwest Oil & Gasfield Company, including one tower adsorption and one tower regeneration, and the two towers are switched to use. Under low load operation, the H2S content in the product gas of the molecular sieve tower fluctuates periodically during regeneration, and there is a potential risk of exceeding the standard. After research and analysis, the optimized adjustment scheme was made. By prolonging the switching period of adsorption regeneration, reducing regeneration time and regeneration temperature, the H2S mass concentration in product gas of the molecular sieve dehydration unit during regeneration was reduced to less than 10 mg/m3, and tended to be stable. The abnormal production problem was solved well.
Key words:  molecular sieve  dehydration  wet regeneration  two-tower  low load  fluctuation