煤泥水pH值对沉降药剂添加顺序的影响研究
|
摘要
以贵州六盘水二塘选煤厂煤样为试验样品,采用聚丙烯酰胺为絮凝剂、硫酸铝为凝聚剂,在调控煤泥水pH值条件下,考察聚丙烯酰胺、硫酸铝添加顺序对煤泥水絮凝沉降效果的影响。试验结果表明,当pH值小于6时,"反加"(先加聚丙烯酰胺再加硫酸铝)的沉降速度比"正加"(先加硫酸铝再加聚丙烯酰胺)的沉降速度快;当pH值大于6时,"正加"的沉降速度比"反加"的沉降速度快。在碱性条件下,随着煤泥水pH值升高,沉降速度开始变缓慢,且澄清区浑浊度较高,沉降效果较差。
A coal sample of Ertang coal preparation plant in Guizhou province was used as the test sample in this paper.Polyacrylamide as flocculant and aluminum sulfate as coagulant were used to investigate the effect of adding order of polyacrylamide and aluminum sulfate on flocculation sedimentation of coal slurry under the different pH.The experimental results showed that when the pH value was less than 6,the sedimentation rate of "anti-addition",adding polyacrylamide firstly and adding aluminum sulfate secondly,was better than that of "positive-addition",adding aluminum sulfate firstly and adding polyacrylamide secondly.When the pH value was more than 6,the sedimentation speed of "positive-addition" was faster than the "anti-addition",as well as the settlement effect.Under the alkaline conditions,the sedimentation rate was becoming to slow down and the turbidity of clarification area was becoming to higher along with the increase of pH value,as well as the settlement effect.
A coal sample of Ertang coal preparation plant in Guizhou province was used as the test sample in this paper.Polyacrylamide as flocculant and aluminum sulfate as coagulant were used to investigate the effect of adding order of polyacrylamide and aluminum sulfate on flocculation sedimentation of coal slurry under the different pH.The experimental results showed that when the pH value was less than 6,the sedimentation rate of "anti-addition",adding polyacrylamide firstly and adding aluminum sulfate secondly,was better than that of "positive-addition",adding aluminum sulfate firstly and adding polyacrylamide secondly.When the pH value was more than 6,the sedimentation speed of "positive-addition" was faster than the "anti-addition",as well as the settlement effect.Under the alkaline conditions,the sedimentation rate was becoming to slow down and the turbidity of clarification area was becoming to higher along with the increase of pH value,as well as the settlement effect.
引文
[1]张明青,刘炯天,单爱琴等.煤泥水中Ca2+在黏土矿物表面的作用[J].煤炭学报,2005(5)
[2]詹传鑫,舒新前,宋素莉.煤泥水的高效资源化利用[J].中国煤炭,2007(8)
[3]Chen J,Min F,Liu L,et al.Hydrophobic aggregation of fine particles in high muddied coal slurry water[J].Water Science&Technology,2016(3)
[4]肖宁伟,张明青,曹亦俊.选煤厂难沉降煤泥水性质及特点研究[J].中国煤炭,2012(6)
[5]刘令云,闵凡飞,张明旭等.不同密度级原煤的泥化特性[J].煤炭学报,2012(S1)
[6]盖春燕,樊民强.pH值对煤泥水处理的影响[J].选煤技术,2010(2)
[7]刘雁鹏.选煤厂煤泥水絮凝沉降试验研究[J].中国煤炭,2011(9)
[8]郑继洪,徐初阳,聂容春等.阳离子型聚丙烯酰胺的絮凝性能研究[J].中国煤炭,2013(4)
[9]贺斌,董宪姝,樊玉萍等.基于EDLVO理论的煤泥水沉降机理的研究[J].煤炭技术,2014(4)
[10]Chen J,Min F,Peng C,et al.Characteristics of the hydrophobic aggregation of fine particles incoal slurry water under the action of quaternary ammonium salt[J].Zhongguo Kuangye Daxue Xuebao/journal of China University of Mining&Technology,2015(2)
[11]刘亚星,吕一波,张乃旭.絮凝剂CPSA制备及煤泥水沉降试验研究[J].洁净煤技术,2016(4)
[12]崔广文,刘惠杰,朱付显等.不同性质煤泥水的絮凝沉降试验研究[J].选煤技术,2009(4)
[13]朱建新.煤泥水絮凝沉降规律的研究[J].煤质技术,2007(1)
[14]徐初阳,罗慧,聂容春等.聚丙烯酰胺的性质对煤泥水絮凝效果的影响[J].煤炭技术,2004(1)
[15]张景,王泽南,宋树磊.煤泥水pH值对絮凝沉降效果的影响[J].洁净煤技术,2011(5)
[16]陈军,闵凡飞,刘令云等.高泥化煤泥水的疏水聚团沉降试验研究[J].煤炭学报,2014(12)
[17]许宁,马强,陶秀祥等.pH值对煤泥水凝聚沉降效果影响的研究[J].洁净煤技术,2009(6)
[18]孙华峰.DLVO理论在煤泥水絮凝机理中的应用分析[J].选煤技术,2013(1)
[19]张建成,刘利波.混凝剂在选煤厂煤泥水处理中的应用及机理研究[J].中国煤炭,2018(1)
[20]陈军,闵凡飞,王辉.微细粒矿物疏水聚团的研究现状及进展[J].矿物学报,2014(2)
[21]谢广元.选矿学[M].北京:中国矿业大学出版社,2016
[2]詹传鑫,舒新前,宋素莉.煤泥水的高效资源化利用[J].中国煤炭,2007(8)
[3]Chen J,Min F,Liu L,et al.Hydrophobic aggregation of fine particles in high muddied coal slurry water[J].Water Science&Technology,2016(3)
[4]肖宁伟,张明青,曹亦俊.选煤厂难沉降煤泥水性质及特点研究[J].中国煤炭,2012(6)
[5]刘令云,闵凡飞,张明旭等.不同密度级原煤的泥化特性[J].煤炭学报,2012(S1)
[6]盖春燕,樊民强.pH值对煤泥水处理的影响[J].选煤技术,2010(2)
[7]刘雁鹏.选煤厂煤泥水絮凝沉降试验研究[J].中国煤炭,2011(9)
[8]郑继洪,徐初阳,聂容春等.阳离子型聚丙烯酰胺的絮凝性能研究[J].中国煤炭,2013(4)
[9]贺斌,董宪姝,樊玉萍等.基于EDLVO理论的煤泥水沉降机理的研究[J].煤炭技术,2014(4)
[10]Chen J,Min F,Peng C,et al.Characteristics of the hydrophobic aggregation of fine particles incoal slurry water under the action of quaternary ammonium salt[J].Zhongguo Kuangye Daxue Xuebao/journal of China University of Mining&Technology,2015(2)
[11]刘亚星,吕一波,张乃旭.絮凝剂CPSA制备及煤泥水沉降试验研究[J].洁净煤技术,2016(4)
[12]崔广文,刘惠杰,朱付显等.不同性质煤泥水的絮凝沉降试验研究[J].选煤技术,2009(4)
[13]朱建新.煤泥水絮凝沉降规律的研究[J].煤质技术,2007(1)
[14]徐初阳,罗慧,聂容春等.聚丙烯酰胺的性质对煤泥水絮凝效果的影响[J].煤炭技术,2004(1)
[15]张景,王泽南,宋树磊.煤泥水pH值对絮凝沉降效果的影响[J].洁净煤技术,2011(5)
[16]陈军,闵凡飞,刘令云等.高泥化煤泥水的疏水聚团沉降试验研究[J].煤炭学报,2014(12)
[17]许宁,马强,陶秀祥等.pH值对煤泥水凝聚沉降效果影响的研究[J].洁净煤技术,2009(6)
[18]孙华峰.DLVO理论在煤泥水絮凝机理中的应用分析[J].选煤技术,2013(1)
[19]张建成,刘利波.混凝剂在选煤厂煤泥水处理中的应用及机理研究[J].中国煤炭,2018(1)
[20]陈军,闵凡飞,王辉.微细粒矿物疏水聚团的研究现状及进展[J].矿物学报,2014(2)
[21]谢广元.选矿学[M].北京:中国矿业大学出版社,2016