臭氧微纳米气泡技术处理油气田钻井废水的试验研究

王瑞琦; 吉永忠; 兰清泉

doi:10.12153/j.issn.1674-991X.20240203

臭氧微纳米气泡技术处理油气田钻井废水的试验研究

doi: 10.12153/j.issn.1674-991X.20240203

1.
南京天祺超氧科技有限公司
2.
中国石油川庆钻探国际工程公司

详细信息

作者简介:
王瑞琦（1995—），女，助理工程师，主要研究方向为微纳米气泡应用技术，2672668443@qq.com

通讯作者:
吉永忠（1968—），男，高级工程师，主要研究方向为石油工程领域的钻井液、完井液和防漏堵漏技术，jiyz_sc@cnpc.com.cn

中图分类号: X703
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出版历程
- 收稿日期: 2024-03-31

Experimental study on treatment of drilling engineering wastewater by ozone micro-nano bubble technology for oil and gas fields

1.
Nanjing Tianqi Advanced Oxidation Co., Ltd.
2.
CNPC Chuanqing Drilling Engineering Co., Ltd.

摘要

摘要:
随着清洁化生产的深入推进和环保意识的提高，对作业现场的钻井废水及其处理方式的要求越来越严格。针对钻井废水稳定性高、化学需氧量（COD）高、色度高、降解难的特点，采用微纳米气泡技术以提高气体利用率和传质效果，结合臭氧对难降解的高浓度有机污染物进行降解。室内模拟试验表明，经过预处理后再采用臭氧微纳米气泡技术处理，COD从47 328 mg/L降至131 mg/L，去除率达到99.7%，TOC从15 146 mg/L降至65.2 mg/L，去除率达到99.6%，COD和TOC的去除率均超过99.5%，臭氧微纳米气泡技术对高色度和高COD具有显著的去除效果。采用絮凝沉淀、芬顿工艺配合臭氧微纳米气泡技术能够降低臭氧投加量，从而降低投资和运行成本，是一种经济高效的处理方法。
- 臭氧 /
- 微纳米气泡 /
- 钻井废水 /
- 高浓度有机物 /
- 高难度有机物 /
- 零排放 /
- 高级氧化
Abstract:
As the "blood" of drilling engineering in petroleum industry, drilling fluid plays a very important role in the process of oil and gas exploration and development. At the job site, drilling fluid is also an important source of drilling wastewater. With the further promotion of cleaner production and the improvement of environmental awareness, the requirements of drilling wastewater and its treatment on the job site have become more and more stringent. In response to the characteristics of good stability, high chemical oxygen demand and difficult degradation of drilling wastewater, micro-nano bubbles were used to improve gas utilization and mass transfer effect, and ozone gas was used to degrade high-difficulty and high-concentration organic matter. The aim was to solve the problems of high chromaticity and high COD of drilling wastewater. The indoor simulation experiment showed that after pretreatment, by using ozone micro-nano bubble technology, COD decreased from 47 328 mg/L to 131 mg/L, with the removal rate of 99.7%, and TOC decreased from 15 146 mg/L to 65.2 mg/L, with the removal rate of 99.6%. The removal rates of COD and TOC could reach more than 99.5%, and the ozone micro-nano bubble technology had a significant removal effect on high chromaticity and high COD. The experiment also showed that the flocculation precipitation and Fenton process combined with ozone micro-nano bubble technology could reduce the amount of ozone added, thereby reducing the investment and operating costs, making it an economical and efficient treatment method.
- ozone /
- micro-nano bubbles /
- drilling wastewater /
- high concentration of organic matter /
- high difficulty organic matter /
- zero emissions /
- advanced oxidation

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图 1 激光粒度仪检测清水中空气纳米气泡粒径及浓度分布

Figure 1. Size and concentration distribution of air nanobubbles in clean water detected by laser particle size analyzer

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图 2 试验设备

Figure 2. Experimental equipment

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图 3 配方2^#原液随臭氧投加量变化

Figure 3. Formula 2^# solution changes with ozone dosage

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图 4 配方2^# ORP和pH、COD和TOC随臭氧投加量的变化

Figure 4. ORP and pH , COD and TOC concentration of formula 2^# solution changes with different ozone dosage

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图 5 配方3^#稀释液随臭氧投加量变化

Figure 5. Formula 3^# dilution solution changes with ozone dosage

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图 6 配方3^#稀释液ORP、pH、COD和TOC随臭氧投加量的变化

Figure 6. ORP, pH , COD and TOC concentration of formula 3^# dilution solution changes with different ozone dosage

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图 7 配方4^#稀释液ORP、pH、COD和TOC随臭氧投加量的变化

Figure 7. ORP, pH , COD and TOC concentration of formula 4^# dilution solution changes with different ozone dosage

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表 1 药剂配方

Table 1. Reagent formulations g/L

配方序号	LIGTROL^®	ENCAPIN^®FA	SULASPHA^®	ENCAPIN^®KP	SMPTROL^®	氢氧化钠	氯化钠
1^#	0	2	0	2	0	0	0
2^#	20	1.5	0	1.5	20	2	0
3^#	20	1.5	10	1.5	20	2	—
4^#	20	1.5	10	1.5	20	2	100

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表 2 试验水质参数

Table 2. Parameters of experimental water quality

配方序号	COD/（mg/L）	pH	TDS/（mg/L）	色度
1^#	2 695	8.62	5 170	0
2^#	40 304	12.26	13 500	20 000
3^#	47 328	11.39	16 450	40 000
4^#	31 308	12.29	106 500	100 000

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表 3 处理过程中配方3^#溶液参数变化

Table 3. Parameters of formula 3^# solution during processing

工艺流程	TOC		COD
工艺流程	浓度/（mg/L）	去除率/%	数值/（mg/L）	去除率/%
原液	15 146		47 328
絮凝沉淀	2 805	81.5	7 854	83.4
芬顿	668.5	95.6	1 671	96.5
臭氧微纳米气泡	65.2	99.6	131	99.7

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