可实现废弃水基钻井液再生利用的电化学吸附法
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摘要
现有的固、液分离技术及设备均难以去除钻井液中粒径小于等于10μm的有害固相及超细微颗粒,钻井现场多采用无害化处理后填埋的方式处置,不仅资源化利用率偏低,还存在着二次污染的风险。为此,提出了采用电化学吸附法对废弃水基钻井液进行再生处理的技术思路:首先通过室内实验,在电吸附电极上施加电压,研究电压、吸附时间、膨润土浓度、极板间距及无机盐浓度对电吸附效果的影响;然后分别考察了4种常用无机盐(NaCl、KCl、CaCl_2、Na_2CO_3)在不同浓度下的电吸附极板对模拟钻井液中固相颗粒的吸附能力;最后在确定最佳电吸附条件的基础上,以国内某油田废弃聚磺钻井液为样品,验证其处理效果。结果表明:(1)电化学吸附法通过吸附去除水基钻井液中的劣质固相,实现了废弃水基钻井液的再生,提高了钻井废弃物的资源化利用率,同时也降低了后期钻井废弃物的处理量及成本;(2)含5%膨润土、2 g/LNaCl的模拟废弃钻井液最佳电吸附条件为吸附电压36 V、吸附时间5 min、极板间距5 cm;(3)上述样品经电化学吸附法处理后,1~10μm粒径劣质固相的去除率超过90%,表明该方法对于去除废弃聚磺钻井液中的劣质固相具有明显的效果。
The harmful solids and nano-particles with particle size smaller than or equal to 10μm can be hardly removed by means of the existing solid–liquid separation.And on drilling sites,they are mostly buried after a harmless treatment,but the resource utilization ratio is low and the risk of secondary pollution still exists.In this paper,a technical idea was proposed to carry out a reclamation treatment on the waste water-based drilling fluids by means of electrochemical adsorption.Firstly,a laboratory test was carried out to investigate the effects of voltage,adsorption time,bentonite concentration,pad spacing and inorganic salt concentration on electro adsorption results by applying voltage on electro adsorption electrode.Then,the adsorption capacity of 4 common inorganic salts(NaCl,KCl,CaCl_2 and Na_2CO_3)to the solid particles in the simulated drilling fluid was investigated on the electro adsorption electrode at different concentrations.Finally,after an optimal electro adsorption condition was determined,the waste polysulfonate drilling fluid of a certain domestic oilfield was taken as a sample to verify such treatment effect.And the following research results were obtained.First,by means of electrochemical adsorption,the inferior solid particles in waste drilling fluids are removed through adsorption,and thus the waste drilling fluid is reclaimed and the the resource reutilization ratio of drilling waste is increased while its treatment volume and cost in the late stage is decreased.Second,the optimal electro adsorption condition of simulated waste drilling fluid with 5%bentonite and 2 g/L NaCl is adsorption voltage of 36 V,adsorption time of 5 min and pad spacing of 5 cm.And third,more than 90%of the inferior solids with a particle size range of 1–10μm are removed after the sample is treated by means of the electrochemical adsorption.It is indicated that this proposed method plays a remarkable role in removing the inferior solids in the waste polysulfonate drilling fluids.
The harmful solids and nano-particles with particle size smaller than or equal to 10μm can be hardly removed by means of the existing solid–liquid separation.And on drilling sites,they are mostly buried after a harmless treatment,but the resource utilization ratio is low and the risk of secondary pollution still exists.In this paper,a technical idea was proposed to carry out a reclamation treatment on the waste water-based drilling fluids by means of electrochemical adsorption.Firstly,a laboratory test was carried out to investigate the effects of voltage,adsorption time,bentonite concentration,pad spacing and inorganic salt concentration on electro adsorption results by applying voltage on electro adsorption electrode.Then,the adsorption capacity of 4 common inorganic salts(NaCl,KCl,CaCl_2 and Na_2CO_3)to the solid particles in the simulated drilling fluid was investigated on the electro adsorption electrode at different concentrations.Finally,after an optimal electro adsorption condition was determined,the waste polysulfonate drilling fluid of a certain domestic oilfield was taken as a sample to verify such treatment effect.And the following research results were obtained.First,by means of electrochemical adsorption,the inferior solid particles in waste drilling fluids are removed through adsorption,and thus the waste drilling fluid is reclaimed and the the resource reutilization ratio of drilling waste is increased while its treatment volume and cost in the late stage is decreased.Second,the optimal electro adsorption condition of simulated waste drilling fluid with 5%bentonite and 2 g/L NaCl is adsorption voltage of 36 V,adsorption time of 5 min and pad spacing of 5 cm.And third,more than 90%of the inferior solids with a particle size range of 1–10μm are removed after the sample is treated by means of the electrochemical adsorption.It is indicated that this proposed method plays a remarkable role in removing the inferior solids in the waste polysulfonate drilling fluids.
引文
[1]冷凡,庄迎春,刘世明,陈兵.泥浆快速化学脱稳与固液分离试验研究[J].哈尔滨工程大学学报,2014,35(3):280-284.Leng Fan,Zhuang Yingchun,Liu Shiming&Chen Bing.Experimental research on rapid chemical destabilization and solid-liquid separation of slurry[J].Journal of Harbin Engineering University,2014,35(3):280-284.
[2]许毓,刘光全,邓皓,谢水祥,张明栋,孙静文,等.高性能水基钻井液废物不落地处理先导试验[J].油气田环境保护,2017,27(3):19-20.Xu Yu,Liu Guangquan,Deng Hao,Xie Shuixiang,Zhang Mingdong,Sun Jingwen,et al.Pilot test of high performance water-based drilling fluid waste treatment[J].Environmental Protection of Oil&Gas Fields,2017,27(3):19-20.
[3]黎强,邹强,杨琳,张斌,苏浩.废弃钻井液不落地达标处理技术在塔里木油田的应用[J].环境工程,2014,32(增刊1):82-84.Li Qiang,Zou Qiang,Yang Lin,Zhang Bin&Su Hao.Application of treating waste drilling fluid by non-landing technology in Tarim oilfield[J].Environmental Engineering,2014,32(S1):82-84.
[4]杨明杰,梁万林,金庆荣,吴西湖,于根年.钻井废泥浆综合治理技术研究[J].矿物岩石,2003,23(1):109-112.Yang Mingjie.Liang Wanlin,Jin Qingrong,Wu Xihu&Yu Gennian.Study on comprehensive treatment technique about waste drilling mud[J].Journal of Mineralogy and Petrology,2003,23(1):109-112.
[5]钟颖.活性炭纤维及其改性后的电极电吸附脱盐研究[D].广州:中山大学,2009.Zhong Ying.Study on electrosorption desalination with activated carbon fiber and its modified electrode[D].Guangzhou:Sun Yatsen University,2009.
[6]段小月,常立民,刘伟,曹宇航.活性炭电极对溶液中Na Cl的电吸附行为[J].化工环保,2010,30(4):356-359.Duan Xiaoyue,Chang Limin,Liu Wei&Cao Yuhang.Electro-adsorption of Na Cl in solution on activated carbon electrode[J].Environmental Protection of Chemical Industry,2010,30(4):356-359.
[7]柯起龙.电吸附水处理技术(EST)对污水悬浮物去除效果研究[J].环境与可持续发展,2015,40(4):218-219.Ke Qilong.Study of the sewage suspended solids removal efficiency of electric adsorption water treatment technology(EST)[J].Environment and Sustainable Development,2015,40(4):218-219.
[8]罗延歆.淮南矿区矿井水处理及电吸附技术应用[J].煤炭工程,2017,49(5):66-68.Luo Yanxin.Application of coal mine water treatment and electric adsorption technology[J].Coal Engineering,2017,49(5):66-68.
[9]Ayrnaci E&Conway BE.Adsorption and electrosorption at high-area carbon-felt electrodes for waste-water purification:Systems evaluation with inorganic,S-containing anions[J].Journal of Applied Electrochemistry,2001,31(3):257-266.
[10]Chen Rong&Hu Xien.Electrosorption of thiocyanate anions on active carbon felt electrode in dilute solution[J].Journal of Colloid and Interface Science,2005,290(1):190-195.
[11]Atkhami A.Adsorption and electrosorption of nitrite on high-area carbon cloth:An approach to purification of water and waste-water samples[J].Carbon,2003,41(6):1320-1322.
[12]张玲,曹忠,陈平,崔正丹,盛智勇,徐芬,等.基于竹炭基活性炭电极的电吸附去离子性能的研究[J].功能材料,2008,39(10):1727-1730.Zhang Ling,Cao Zhong,Chen Ping,Cui Zhengdan,Sheng Zhiyong,Xu Fen,et al.Electrosorptive deionization with activated carbon electrodes based on bamboo chars[J].Journal of Functional Materials,2008,39(10):1727-1730.
[13]王璐.电吸附法去除水中重金属离子的研究[D].西安:西安建筑科技大学,2010.Wang Lu.Study on electrosorption removal of heavy metal ion from wastewater[D].Xi'an:Xi'an University of Architecture and Technology,2010.
[14]Rana P,Mohan N&Rajagopal C.Electrochemical removal of chromium from wastewater by using carbon aerogel electrodes[J].Water Research,2004,38(12):2811-2820.
[15]Ania CO&Béguin F.Mechanism of adsorption and electrosorption of bentazone on activated carbon cloth in aqueous solutions[J].Water Research,2007,41(15):3372-3380.
[16]Plaisance H,Mocho P&Bonnecaze G.Adsorption et electrosorption de benzene sur charbon actif en grains adsorption and electrosorption of benzene on granular activated carbon[J].Environmental Technology,1996,17(12):1313-1325.
[17]Ayranci E&Conway BE.Removal of phenol,phenoxide and chlorophenols from waste-waters by adsorption and electrosorption at high-area carbon felt electrodes[J].Journal of Electroanalytical Chemistry,2001,513(2):100-110.
[2]许毓,刘光全,邓皓,谢水祥,张明栋,孙静文,等.高性能水基钻井液废物不落地处理先导试验[J].油气田环境保护,2017,27(3):19-20.Xu Yu,Liu Guangquan,Deng Hao,Xie Shuixiang,Zhang Mingdong,Sun Jingwen,et al.Pilot test of high performance water-based drilling fluid waste treatment[J].Environmental Protection of Oil&Gas Fields,2017,27(3):19-20.
[3]黎强,邹强,杨琳,张斌,苏浩.废弃钻井液不落地达标处理技术在塔里木油田的应用[J].环境工程,2014,32(增刊1):82-84.Li Qiang,Zou Qiang,Yang Lin,Zhang Bin&Su Hao.Application of treating waste drilling fluid by non-landing technology in Tarim oilfield[J].Environmental Engineering,2014,32(S1):82-84.
[4]杨明杰,梁万林,金庆荣,吴西湖,于根年.钻井废泥浆综合治理技术研究[J].矿物岩石,2003,23(1):109-112.Yang Mingjie.Liang Wanlin,Jin Qingrong,Wu Xihu&Yu Gennian.Study on comprehensive treatment technique about waste drilling mud[J].Journal of Mineralogy and Petrology,2003,23(1):109-112.
[5]钟颖.活性炭纤维及其改性后的电极电吸附脱盐研究[D].广州:中山大学,2009.Zhong Ying.Study on electrosorption desalination with activated carbon fiber and its modified electrode[D].Guangzhou:Sun Yatsen University,2009.
[6]段小月,常立民,刘伟,曹宇航.活性炭电极对溶液中Na Cl的电吸附行为[J].化工环保,2010,30(4):356-359.Duan Xiaoyue,Chang Limin,Liu Wei&Cao Yuhang.Electro-adsorption of Na Cl in solution on activated carbon electrode[J].Environmental Protection of Chemical Industry,2010,30(4):356-359.
[7]柯起龙.电吸附水处理技术(EST)对污水悬浮物去除效果研究[J].环境与可持续发展,2015,40(4):218-219.Ke Qilong.Study of the sewage suspended solids removal efficiency of electric adsorption water treatment technology(EST)[J].Environment and Sustainable Development,2015,40(4):218-219.
[8]罗延歆.淮南矿区矿井水处理及电吸附技术应用[J].煤炭工程,2017,49(5):66-68.Luo Yanxin.Application of coal mine water treatment and electric adsorption technology[J].Coal Engineering,2017,49(5):66-68.
[9]Ayrnaci E&Conway BE.Adsorption and electrosorption at high-area carbon-felt electrodes for waste-water purification:Systems evaluation with inorganic,S-containing anions[J].Journal of Applied Electrochemistry,2001,31(3):257-266.
[10]Chen Rong&Hu Xien.Electrosorption of thiocyanate anions on active carbon felt electrode in dilute solution[J].Journal of Colloid and Interface Science,2005,290(1):190-195.
[11]Atkhami A.Adsorption and electrosorption of nitrite on high-area carbon cloth:An approach to purification of water and waste-water samples[J].Carbon,2003,41(6):1320-1322.
[12]张玲,曹忠,陈平,崔正丹,盛智勇,徐芬,等.基于竹炭基活性炭电极的电吸附去离子性能的研究[J].功能材料,2008,39(10):1727-1730.Zhang Ling,Cao Zhong,Chen Ping,Cui Zhengdan,Sheng Zhiyong,Xu Fen,et al.Electrosorptive deionization with activated carbon electrodes based on bamboo chars[J].Journal of Functional Materials,2008,39(10):1727-1730.
[13]王璐.电吸附法去除水中重金属离子的研究[D].西安:西安建筑科技大学,2010.Wang Lu.Study on electrosorption removal of heavy metal ion from wastewater[D].Xi'an:Xi'an University of Architecture and Technology,2010.
[14]Rana P,Mohan N&Rajagopal C.Electrochemical removal of chromium from wastewater by using carbon aerogel electrodes[J].Water Research,2004,38(12):2811-2820.
[15]Ania CO&Béguin F.Mechanism of adsorption and electrosorption of bentazone on activated carbon cloth in aqueous solutions[J].Water Research,2007,41(15):3372-3380.
[16]Plaisance H,Mocho P&Bonnecaze G.Adsorption et electrosorption de benzene sur charbon actif en grains adsorption and electrosorption of benzene on granular activated carbon[J].Environmental Technology,1996,17(12):1313-1325.
[17]Ayranci E&Conway BE.Removal of phenol,phenoxide and chlorophenols from waste-waters by adsorption and electrosorption at high-area carbon felt electrodes[J].Journal of Electroanalytical Chemistry,2001,513(2):100-110.