摘要
冬季为了防止天然气水合物的形成,长庆气田采用了井口注醇的措施并通过甲醇回收装置对单井产污水进行集中处理。虽然目前部分集气站采用了分排分储的方法,但是冬季和夏季含醇污水浓度还存在很大差异,冬季含醇污水浓度约为20%,而夏季通常都低于3%。针对这一情况,对甲醇回收装置不同原料浓度下的各种运行参数进行了优化,以保证装置经济、平稳运行,确保产品甲醇及塔底水合格。研究认为:①在含醇污水浓度变化时候,为保证产品甲醇质量及塔底水合格,不能沿用设计工艺参数,应根据工矿对工艺参数适当进行调整;②主要通过对含醇污水进行预处理和对进料温度、塔顶塔底温度的调整,可以保证产品甲醇和塔底水同时满足装置设计要求;③调整工艺参数后在一定程度上可以缓解设备、管线结垢问题,但不能从根本上加以解决。因此,应优化含醇污水预处理工艺,提高含醇污水预处理效果。
To avoid the formation of natural gas hydrate, Changqing Gasfield adopted the solution of methanol injection from the wellhead and central treatment of sewage produced by individual well via methanol recycle facility. Although a part of the gas gathering stations adopted the separated sewage drainage and storage method, the concentration of methanol-bearing sewage varies largely in summer and winter, which is about 20% in winter, while lower than 3% in summer. Therefore, different operation parameters with different material concentration of methanol recycle facility were optimized to ensure economical and stable of operation and qualified methanol product and tower buttoms. The suggestions were given below: 1) to ensure qualified methanol product and tower buttoms under the condition of changed methanol-bearing sewage concentration, the process parameter should be adjusted according to the work condition, rather than adopt designed process parameter; 2) the qualified methanol product and required tower bottoms can be ensured mainly through pretreatment of the methanol-bearing sewage and adjustment of the temperature of feedstock, tower top and tower bottom; 3) scale formation problem can be alleviated but can not be solved completely via adjusting the process parameters. Therefore, the pretreatment technology of methanol-bearing sewage should be optimized to upgrade its pretreatment performance.
出处
《天然气工业》
EI
CAS
CSCD
北大核心
2006年第9期150-151,共2页
Natural Gas Industry
关键词
长庆气田
甲醇
回收
装置
含醇污水
工艺
技术
参数
优化设计
Changqing Gasfield, methanol, recycle, facility, methanol-bearing sewage, process, technology, parameter, optimization design
