Chineseabstract
CoalisChina'smostmainsourceofenergy,anditinourcountry'senergyproductionandconsumptionareabout75%.Ourcoalreservesisrich,duringthenextthirtya50years,coal-basedenergystructurecan'tchange,coalenergybasispositionwillnotchange.Withtheimprovementofcoalminingmechanizationdegreeandgeologicalconditionschange,coalqualityhaveworsentrend.
Coalproductionandutilizationofenvironmentwillcausepollution.Coalitselfirrefragableanditscausetheworseningoftheenvironmentalconsequences,makecoalenergyofcleanerproductionandtoutilizebecomeafacinganimportantandurgenttask.Therefore,vigorouslydevelopcoalcleanerproductionandutilizationofcoalindustry,topromotethesustainabledevelopmentofsocialeconomyandfurtherpromotethehealthyandsteadydevelopmenthasimportantrealisticsignificancetothesustainabledevelopmentofthehumansocietyhasverypositiverole.
Coalcleaninghasbecomeamodernproductionofcoalindustryindispensableimportantlinksandcleancoaltechnologyofsourcetechnology,isthebasisandpremiseofcoalprocessing.So-calledcoalcleaningistheuseofphysical,chemicalandphysicalmethod,thecoalintodifferentquality,specificationproductprocess.Coalcleaningcanremoveimpurities,includingcoalgangueand50to70percentofsulphur,enhancethecoalqualityofproductsandtheincreaseofcoalvarieties,reduceineffectivetransportation,improveefficiency,savingenergy,reduceS02,NOXandsootemissions.
Choosecoalasthebasisofcleancoaltechnology,maturetechnology,lessinvestment,operationcostislow,coalprocessing-CWM,coalgasification,coalliquefactionofpremise.Statethecleancoaltechnologyasaguaranteeofnationaleconomysustainableandhealthydevelopmentoftheimportantmeans.
Thispaperfirstlycoalwashingthemaintheoreticalknowledgeandprocessmethodsareintroduced,andcombiningthecurrentsituationofdevelopmentathomeandabroad,andthenthroughcombiningqixingcoalpreparationplantactualproductionconditions,fromcoalproductionprocessbasedoncoalcleanerproductionstatusofresearchandinvestigation,touchcontaminationactualityandtheproducingblowdownkeyandthroughqualitativecomparisonorquantitativeanalysisofcoalwashery,toevaluatethestatusquoofcleanerproduction,andidentifythekeypoint,finally,accordingtothekeypointsetofcleanerproductiongoalsandsolutions.
Keyword:cleanproduction,ofslimewatertreatment,coalcleaningtechnology,coalwashingwaterclosed-circuitcirculation