摘要
为满足天然气管输和环保规范要求,原料天然气必须经过净化处理。天然气中的酸性气体主要是H2S和CO2,有时还含有少量的硫醇和硫醚等。H2S会腐蚀管道及设备,污染环境,而过量CO2会影响天然气热值,降低经济效益,因此,天然气脱硫脱碳技术备受关注。总结了目前占据主导地位的湿法脱硫技术,论述了物理吸收法、化学吸收法、联合吸收法和氧化吸收法中各主要工艺的原理、流程、优缺点及应用情况,同时介绍了几种具有良好发展前景的新型工艺,比如杂多酸法等。可以看到,醇胺法工艺成熟,脱硫效果显著,尤其是MDEA及其配方工艺,得到了广泛的应用;同时,各种新型技术也日臻完善,天然气脱硫技术正向着多元化的方向发展。
In order to meet requirements for gas pipeline transportation and environmental protection,it is necessary to purify raw natural gas with acidic components(H 2 S and/or CO 2 with a small number of mercaptan and/or thioether on some occasions).H 2 S has strong corrosivity on pipeline,equipment and other facilities as well as environment,excessive CO 2 may reduce heat value of natural gas and decrease overall economic benefits.Therefore,widely attention has been paid to desulphurization and decarburization technology.Introduced is the wet desulphurization technology mainly applied in natural gas treatment,described are principles,technological processes,advantages and disadvantages and application situations of physical absorption method,chemical absorption method,combined absorption method and oxidation absorption method and proposed are several new technologies which have good development prospect,such as heteropoly acid method.Comparative analysis results show that amine method process is relative mature and highly effective,especially,MDEA and its associated formulas are widely applied.Various new technologies are more and more perfect and gas desulfurization technology is developed towards the direction of diversification.
出处
《天然气与石油》
2013年第2期40-42,4,共3页
Natural Gas and Oil
基金
中国石油天然气集团公司重点工程资助项目(S2012-9D)
关键词
天然气
脱硫
H2S
MDEA
Natural gas
Desulphurization
Sulfur dioxide
MDEA
