盐水组分和碱性条件对水煤浆制浆的影响

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1、HansJournalofChemicalEngineeringandTechnology化学工程与技术,2017,7(1),13-21 PublishedOnlineJanuary2017inHans.http://www.hanspub.org/journal/hjcet http://dx.doi.org/10.12677/hjcet.2017.71003EffectofSaltSolutionandAlkaliSolutionon PreparationofCWSHepingLi,Xia

2、oboYan,XuemeiWang,WanyiLiu*SchoolofChemistryandChemicalEngineering,NingxiaUniversity,YinchuanNingxiaReceived:Dec.29th,2016;accepted:Jan.19th,2017;published:Jan.22nd,2017AbstractInthispaper,throughtheuseofdifferentconcentrationsofNaCl,Na2SO4,Na2CO3,Na

3、HCO3,CaSO4, MgSO4,NaOHsolutionforthepreparationofcoalwaterslurry,theeffectsofvariousadditivesof differentpulpconcentrationonthepulpingpropertiesofcoalwaterslurry,andtheeffectsof compositionofcoalwaterslurrypHvalue,heatofcombustionwereinvestigated.And

4、thesurface contactanglebetweensaltwaterandcoal,alkaliwaterandcoalwastested.Theresultsshowthat thesaltwaterandalkalinewaterhaveinfluencesonviscosityofcoalwaterslurry.Thebestadding compositionforsaltwateris1.0wt%NaCl,3.0wt%Na2CO3,0.50wt%NaHCO3,and1.0wt

5、%MgSO4. SaturatedCaSO4solutionand1wt%NaOHsolutioninsteadofwaterarenotsuitableforCWS preparation.TheadditionofNa2SO4isnotconducivetothepreparationofcoalwaterslurry.The contactanglesofallthesaltsandalkaliwatershowedadecreasingtendencycomparedwiththe co

6、ntactangleoffreshwater.Weakalkalineconditionsareconducivetothelowerviscosityof coal-waterslurryandareusefulforslurrypreparation.Additionoflessthan1wt%salineoralka- linewaterdoesnotaffectthecombustioncharacteristicsofCWS.KeywordsSaltSolution,AlkalineS

7、olution,PHValue,ContactAngle,CombustionHeat盐水组分和碱性条件对水煤浆制浆的影响李和平，闫小波，王雪梅，刘万毅*宁夏大学化学化工学院，宁夏银川收稿日期：2016年12月29日；录用日期：2017年1月19日；发布日期：2017年1月22日*通讯作者。文章引用:李和平,闫小波,王雪梅,刘万毅.盐水组分和碱性条件对水煤浆制浆的影响[J].化学工程与技术,2017,7(1):13-21.http://dx.doi.org/10.12677/hjcet.2017

8、.71003李和平等摘要通过选用不同浓度的NaCl、Na2SO4、Na2CO3、NaHCO3、CaSO4、MgSO4、NaOH溶液制备水煤浆，考察 了不同制浆浓度下各添加物对水煤浆制浆特性的影响，添加组分对水煤浆pH值、燃烧热的影响。并测试 了盐水与煤、碱水与煤的表面接触角。结果表明：盐水和碱水对水煤浆的黏度有较大影响。各盐水制浆的最佳盐水添加条件为1.0wt%NaCl溶液，3.0wt%Na2CO3溶液，0.50wt%NaHCO3溶液，1.0wt% MgSO4溶液。饱和CaSO4溶液和1wt%浓