摘要
随着天然气净化厂Cansolv尾气处理装置的陆续投产运行,装置整体运行平稳,均能实现较低浓度的SO_(2)排放,但在运行过程中,存在胺液中热稳定盐含量偏高、中和废水中COD及还原性硫含量过高、烟气加热器窜漏等问题。通过对存在的问题进行分析,采取了以下措施:①加强尾气焚烧炉配风操作和炉膛温度控制;②增加湿式电除雾器电晕极和沉淀极的冲洗频率;③对湿式电除雾器绝缘子室接入氮气进行气封保护;④增大胺液净化装置程序中用除盐水置换DS溶液的水量;⑤调整DS溶液温度和尾气进口温度;⑥控制DS溶液质量分数;⑦增加臭氧催化氧化工艺;⑧对烟气加热器入口管线进行伴热;⑨烟气加热前设置排液口;⑩升级烟气加热器材质;○11优化设备布置等。通过采取上述措施,有效保证了Cansolv尾气处理装置的安全平稳运行,尾气中SO_(2)排放质量浓度满足GB 39728-2020《陆上石油天然气开采工业污染物排放标准》的要求。
With the commissioning of Cansolv tail gas treatment device in natural gas purification plant,the devices operate smoothly overall,theSO_(2) mass concentration in tail gas can achieve low emissions.But in the course of operation,there existed a series of problems as follows:the thermal stability salt content in amine solution was high,the COD and reductive S content in neutralizing wastewater was too high,and the flue gas heater leaked.By analyzing the existing problems,the following measures had been taken:(1)Enhancing the wind distribution operation and furnace temperature control of the exhaust incinerator;(2)Increasing the flushing frequency of corona and precipitation electrode of the wet electrostatic precipitator;(3)Introducing nitrogen gas into the insulator chamber of wet electrostatic precipitator for gas seal protection;(4)Increasing the flow rate of desalinated water to replace the DS solution in the program of amine solution purification device;(5)Adjusting the temperature of the DS solution and the inlet temperature of the exhaust gas;(6)Controlling the mass fraction of the DS solution;(7)Adding the process of ozone catalytic oxidation;(8)Increasing heat tracing pipeline of the flue gas heater inlet pipeline;(9)Setting the discharge port before the flue gas being heated;(10)Upgrading the material of flue gas heater;(11)Optimizing the equipment arrangement.By taking above measures,the safe and smooth operation of Cansolv tail gas treatment unit was ensured effectively,and the SO_(2) mass concentration in emission tail gas meets the requirements of GB 39728-2020 Emission Standard of Air Pollutants for Onshore Oil and Gas Exploitation and Production Industry.
作者
瞿杨
周军
罗东
许佳乐
徐飞
汪联斌
Qu Yang;Zhou Jun;Luo Dong;Xu Jiale;Xu Fei;Wang Lianbin(Natural Gas Purification Plant General,PetroChina Southwest Oil&Gasfield Company,Chongqing,China)
出处
《石油与天然气化工》
CAS
CSCD
北大核心
2021年第5期23-27,32,共6页
Chemical engineering of oil & gas
