天然气净化厂高盐环胺废液处理工艺研究  

Study on treatment process of high-salinity cyclamine waste liquid in a natural gas purification plant

作　　者：肖芳 廖晓伟 范锐 廖铁 李云龙 曹亮 XIAO Fang;LIAO Xiaowei;FAN Rui;LIAO Tie;LI Yunlong;CAO Liang(CPECC Southwest Company,Chengdu,Sichuan,610041,China;PetroChina Southwest Oil&Gas Field Company,Chengdu,Sichuan,610215,China;PetroChina Southwest Oil&Gas Field Company Natural Gas Purification Plant Wanzhou Branch,Chongqing,404002,China)

机构地区：[1]中国石油工程建设有限公司西南分公司,四川成都610041 [2]中国石油西南油气田公司,四川成都610215 [3]中国石油西南油气田公司天然气净化总厂万州分厂,重庆404002

出　　处：《天然气与石油》2023年第4期99-106,共8页Natural Gas and Oil

基　　金：中国石油工程建设有限公司科研项目“天然气净化厂高盐环胺废水达标外排工艺优化研究”(FKY2021-206)。

摘　　要：天然气净化厂尾气氧化吸收工艺中会产生大量高盐环胺废液,主要为胺液净化装置中树脂再生产生的废液,主要为有机胺及硫酸盐,可生化性差。以氧化吸收工艺产生的高盐环胺废液为处理对象开展了全流程工艺的研究,形成了“预处理→反渗透脱盐→电渗析膜浓缩分离→组合氧化降解→蒸发结晶”的尾气废液组合处理工艺。废液经尾气废液组合处理工艺处理后,再通过生化处理,最终产水化学需氧量降至81.5 mg/L,氨氮浓度小于1 mg/L,Na_(2)SO_(4)浓度降至0.23 g/L,实现达标排放。研究结果可为后期工程化设计提供技术指导。In natural gas purification plants,the wastewater produced by resin regeneration in the amine purification unit(APU)of the tail gas oxidation process contains a large amount of organic amines and sulfates,and has poor biodegradability.This paper took the tail gas oxidation process wastewater as the subject of the study to carry out research on the integrated process,and formed a complete set of tail gas waste water treatment process of“pretreatment→reverse osmosis desalination→electrodialysis membrane concentration and separation→combined oxidative degradation→evaporative crystallization”.After the above treatment process,followed by the biochemical treatment,the COD of the produced water was reduced to 81.5 mg/L,the ammonia nitrogen concentration was less than 1 mg/L,and the sodium sulfate concentration was reduced to 0.23 g/L,meeting the requirements of the discharge standard.The research results can provide technical guidance for future engineering design.

关 键 词：胺液净化 Na_(2)SO_(4) 废液 高盐环胺 达标排放 

分 类 号：X743[环境科学与工程—环境工程]