煤沥青水浆的制备及影响规律的研究.pdf

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1、第39卷第7期燃料化学学报VO1．39No．72011年7月JournalofFuelChemistryandTechnologyJu1．2011文章编号：0253—2409(2011)07-0501-06煤沥青水浆的制备及影响规律的研究李兴，王灿，常宏宏，魏文珑，王志忠(太原理工大学化学化工学院，山西太原030024)摘要：以中温煤沥青为原料，经冷冻粉碎后制得具有～定粒径级配的煤沥青粉，加入适量分散剂和水在高速搅拌下制备煤沥青水浆。结果表明，几一C01中裂乳化剂是制备煤沥青水浆的优良分散剂，在此基础上进一步考察了分散剂用量及浆体浓度对煤沥青成浆性、煤沥青水浆流变性及稳定性的影响。结果表明，最

2、大成浆浓度为70％；在分散剂用量相同的条件下，煤沥青水浆的表观黏度随浆体浓度的增大呈先减小后增大趋势；不同浓度煤沥青水浆的表观黏度均随剪切速率的增加而呈下降趋势；同一剪切速率下，表观黏度随煤沥青水浆浓度的增大而增加，煤沥青水浆属于假塑性流体，当煤沥青水浆浓度为69％时其流变性最佳。分散剂用量相同时，煤沥青水浆的稳定性随浆体浓度的增大呈下降趋势，浆体浓度达到70％时，稳定天数可达21d。参照水煤浆标准GB／T18856—2002，对煤沥青水浆进行了分析，所测项目中低位发热量达水煤浆I级标准、灰分达水煤浆I级标准、硫分达水煤浆Ⅱ级标准、挥发分达水煤浆I级标准。关键词：煤沥青；煤沥青水浆；成浆性；流

3、变性；稳定性中图分类号：TQ519文献标识码：APreparationandinfluencefactorsofcoalpitchwaterslurryLIXing，WANGCan，CHANGHong—hong，WEIWen—long，WANGZhi—zhong(CollegeofChemistryandChemicalEngineering，TaiyuanUniversityofTechnology，Taiyuan030024，China)Abstract：Themediumtemperaturecoaltarpitchwasusedastherawmaterialtopreparecoal

4、tarpitchpowderwithcertainparticlesizedistributionbyfreezingandthenpulverizing．Byaddingproperamountofdispersantandwater，thecoaltarpitchpowderwasmadeintothecoalpitchwaterslurry(CPWS)athighagitatingspeed．ThescreeningexperimentsshowthattheJL．C01emulsifierhasthebestdispersioneffect．Theeffectofthedispersa

5、ntdosageandslurryconcentrationontheslurry—ability．rheologicalbehaviorandstaticstabilityofCPWSwereinvestigated．Themaximumslurry．abilityconcentrationis70％．TheapparentviscosityofCPWSfirstlydecreasesandthenincreaseswithincreasingshearingratewhenthedispersantdosageissame．Fordifferentslurryconcentrations，

6、theapparentviscosityofCPwSpresentsadecreasingtendencywithincreasingshearingrate．Underthesarfleshearingrate，theapparentviscositygoesupastheslurryconcentrationincreases．TheCPWSisapseudo．plasticfluid．Thebestrheologicalbehaviorisobtainedwhentheslurryconcentrationis69％．Whentheslurryconcentrationis70％．the

7、slurrymaintainsstablefor21d．ReferringtoCOalwaterslurrycriterionGB／T18856．2002，thecombustionanalysisofCPWSwasmade．Thelowheatvalue，ash，andthevolatilematterallmeetthefirstgradestandardforCOalwaterslurry．