一种新型的气田含汞污水处理技术研究
Study on a new treatment technology for gas field mercury-containing waste-water
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- 引用格式:
-
杨洋,赵琼,何化,曹亮,严紫含.一种新型的气田含汞污水处理技术研究[J].天然气与石油,2021,39(1):114-119.doi:10.3969/j.issn.1006-5539.2021.01.018
YANG Yang, ZHAO Qiong, HE Hua, CAO Liang, YAN Zihan.Study on a new treatment technology for gas field mercury-containing waste-water[J].Natural Gas and Oil,2021,39(1):114-119.doi:10.3969/j.issn.1006-5539.2021.01.018
- DOI:
- 10.3969/j.issn.1006-5539.2021.01.018
- 作者:
- 杨洋，赵琼，何化，曹亮，严紫含
YANG Yang, ZHAO Qiong, HE Hua, CAO Liang, YAN Zihan
- 作者单位:
- 中国石油工程建设有限公司西南分公司
China Petroleum Engineering & Construction Corp. Southwest Company, Chengdu, Sichuan, 610041, China
- 关键词:
- 气田水;含汞污水;脱汞;处理工艺
Gas field produced water; Mercury-containing waste-water; Mercury removal; Treatment process technology
- 摘要:
- 气田含汞污水总汞浓度高、汞形态复杂多样、络合汞稳定难处理,且水质背景复杂,属于高矿化度、高氯根和高浓度有机废水。单一处理方法很难达到处理效果,采用“预处理工艺+高效捕捉脱汞工艺+可再生吸附脱汞工艺”的新型处理技术对气田污水中总汞、油类和SS进行去除。现场中试装置运行结果表明,该新型处理技术脱汞效果达99%,油类和SS的去除率分别大于80%和95%,处理后出水稳定达标。装置的最终出水总汞浓度远低于GB 8978—1996《污水综合排放标准》50 μg/L的限值要求;油类和SS指标均达到SY/T 6596—2016《气田水注入技术要求》的相关要求。此种新型处理技术研究为气田含汞污水处理提供了理论依据和技术数据,为含汞气田安全环保开发提供了技术支撑。
The mercury containing waste water from the gas field is characterized by high concentration of total mercury, complex and diverse forms of mercury, stable and difficult to treat complex mercury. Furthermore, the waste water quality is complicated, and belongs to the category of highly mineralized, highly chlorinated and highly concentrated organic waste water. Under this situation, it is difficult to achieve the expected treatment effect with a single process. Thus, a new technology of “pretreatment process +high efficiency mercury capture process + renewable mercury adsorption process” is developed to remove total mercury, oil and SS (suspended solid). The study results show that the mercury removal efficiency of the new process is up to 99%, and removal rate of oil and SS is over 80% and 95% respectively. The effluent from the waste water treatment facilities consistently meets the standard requirements. The total mercury concentration in the final effluent is far below the limit of 50 μg/L as per GB 8978-1996 Comprehensive Sewage Discharge Standard. Both oil and SS contents meet the relevant requirements specified by SY/T 6596-2016 Technical Requirements for Gas field Water Injection. The study of this new treatment technology provides theoretical basis and technical data for the treatment of gas field mercury containing waste water, and provides technical support for the safe and environmentally friendly development of mercury containing gas fields.
