Study on mathematical model of steam coal blending.pdf

维普资讯 JOURNAL OF COAL SCIENCE ＆ ENGINEERING (CHINA) ISSN 10O69·097 PP104～106 Vo1．8 No 1 June2002 Studyonm athematicalmodelofsteam coalblending GAO Hong-ge (高洪 阁)，LIBai-ying (李 白英)，LIUZe-chang (刘泽常)，YINZeng。de (尹增德) (ShangdongUniversityofScienceandTechnology．Taian 271019，China) Abstract Itisnecessaryto setupanew mathematicalmodelofsteam coalblending instead oftheoldmode1．Indexessuchasmoisturecontent，ashcontent，volatilematter，sulfurcon- tentandheatingvalue in thenew mathematicalmodelhave linearrelation．Thenew mathe- maticalmodelcanalsopredictash-fusiontemperaturepreciselybyconsideringcoalashratio insteam coalblending，thereforeitispossibletoobtainlinearrelationofash-fusiontempera- turebetween singlecoalandsteam coalblending．Thenew mathematicalmodelcanimprove precisionofsteam coalblendingandperfecttheoldmathematicalmodelofsteam coalblend。 ing． Keywords steam coalblending， new mathematicalmodel，ash-fusion temperature，linear relation Introduction Chinaisthelargestcoalproducerand consumerin theworld．Coalasmainresourceswilllastforalongtime becauseofthepresentsituationofmineralsinChina．Four．fifthsoutputofraw coalisdirectlycombusted ．Coal resourcenotonlyiswasted butalsopollutesenvironmentifcoalqualityean notmeetboilersdemand． Steam coalblendingisatypeofpracticaltechnologythatiswidelystudied．Steam coalblendingmeansmixture ofdifferentcoalasarequirementofconsumersand issuitableto combustion ofboilers．Peoplebegin topay more attention toreducepollutionwiththetapingandutilizingofcoa1．Therefore，itisimportanttousecoaleffectively， reasonablyand efficientlyin ordertomakecoalindustryprogresscontinuouslyatpresent．Steam coalblendingis considered to beanew typeofeoalwiththecharacteristicsofitssin