“双碳”目标下天然气净化厂碳资源回收工艺及应用展望——以中国石油西南油气田公司为例  

Recycling carbon resources in natural-gas purification plants under the carbon-peak and carbon-neutrality goal:An example from PetroChina Southwest Oil&Gasfield Company

作　　者：高进 江山 瞿杨 韩伊婷 GAO Jin;JIANG Shan;QU Yang;HAN Yiting(Natural Gas Purification Plant General,PetroChina Southwest Oil&Gasfield Company,Chongqing 401147,China)

机构地区：[1]中国石油西南油气田公司天然气净化总厂,重庆401147

出　　处：《天然气技术与经济》2024年第2期39-44,共6页Natural Gas Technology and Economy

摘　　要：为了回收和利用天然气净化厂的碳资源,通过对天然气净化厂碳资源的分布现状和回收的难易程度以及国内现有二氧化碳回收技术进行分析研究,确定了天然气净化厂碳资源的回收范围、回收方式以及回收工艺,并提出了天然气净化厂碳资源利用的应用展望。研究结果表明:(1)天然气净化厂具有丰富的碳资源,其来自于原料天然气中夹带的二氧化碳和生产装置运行过程中天然气燃烧产生的二氧化碳;(2)天然气净化厂绝大部分碳资源均可回收,其可回收的碳资源有产品天然气中的二氧化碳、过程排放的二氧化碳以及天然气在工业炉内燃烧产生的二氧化碳;(3)天然气净化厂应优先采用醇胺溶液化学吸收法回收碳资源。基于研究结果,结合天然气净化厂工艺装置现状,对天然气净化厂碳资源的利用提出了5个方面的应用展望:(1)降低二氧化碳脱除率,提高商品气率;(2)替代氮气用作吹扫气和保护气;(3)二氧化碳产品;(4)以二氧化碳为原料制作化工产品;(5)碳排放权交易及二氧化碳封存。In this study,the carbon resource distribution,recycling challenges,and domestic carbon dioxide(CO2)recy⁃cling technologies were analyzed in order for recycling carbon resources in natural-gas purification plants.Moreover,the re⁃cycling range,methods and process were determined,and application prospects of this resource utilization were been pre⁃dicted.Results show that(i)these purification plants boast abundant carbon resources,including CO2 accompanied in raw gas and the other generated from natural-gas combustion during production runs;(ii)most carbon in the plants are recover⁃able,for example CO2 in gas products,CO2 emitted in recycling and generated from the gas combustion in industrial fur⁃nace;and(iii)the priority shall be given to the chemical absorption based on alcohol amine solution to this recycling.Com⁃bined with the status quo of process units in the purification plants,five prospects are put forward,namely reducing CO2 removal rate while improving commercial gas ratio,replacing nitrogen to be as purge or protective gas,CO2 products,tak⁃ing CO2 as raw materials to manufacture chemical products and carbon-emission trading and CO2 storage.

关 键 词：碳达峰碳中和 碳资源 二氧化碳 回收技术 应用展望 

分 类 号：TE64[石油与天然气工程—油气加工工程]