氣化對煤質(zhì)的要求

燃料與化工lar. 2011Fuel Chemical ProcessesVol, 42 No. 2氣化對煤質(zhì)的要求李磊路文學(xué)傅進(jìn)軍(水煤漿氣化及煤化工國家工程研究中心,滕州277527)摘要:介紹了氣流床氣化對煤質(zhì)的要求,論述了煤的水分、反應活性、粒度和灰分對氣化的影響。研究表明,煤的內水含量是決定煤漿性能的主要因素,灰渣的黏溫曲線(xiàn)比灰熔點(diǎn)對氣化爐的操作更具指導意義,選擇在操作溫度區間灰渣黏度變化平緩的煤種有利于氣化爐的安全、平穩運行關(guān)鍵詞:煤氣化水分反應活性灰分中圖分類(lèi)號:TQ文獻標識碼:A文章編號:1001-3709a201)02-0004-03Requirement of gasification on coal qualityLi Lei Lu Wenxue Fu jinjun( Coal Water Mixture Gasification and Coal Chemical National Project Research Center, Tengzhou 277527, China)Abstract: The requirement of gasification with gas flow bed on coal quality was introduced, the influenceof coal moisture, reactivity, size and ash on gasification was described. The study showed that water in coalwas the main factor to determine coal slurry property, the sticking temperature curve of ash slag had moreinstructive significance than ash fusion point in the operation of gasifier, to select coal which had flat ashslag viscosity variation in the operating temperature area was beneficial to the safe and stable running ofKey words: Coal gasification Moisture Reactivity Ash自20世紀90年代國內引進(jìn)第1套氣流床煤氣爐,氣化爐為蒸發(fā)這部分水分需消耗熱量,而使氣化工藝——Teκxaco水煤漿氣化技術(shù)以來(lái),陸續引化爐的操作溫度降低。為保持氣化反應溫度,就必進(jìn)了 shell干煤粉氣化工藝和GSP氣化技術(shù)。與此須增加參加反應的氧氣的量,這會(huì )引起有效氣體成同時(shí),國內也研發(fā)出新型氣化爐和H-T爐等煤氣分中的CO含量下降,而有效氣體成分中的H2增化工藝,這些技術(shù)的廣泛應用提高了我國煤炭利用加甚微,氣化反應的比氧耗增大。率,解決了原料煤本地化問(wèn)題,為國內大型煤化工煤的內水含量隨其變質(zhì)程度的加深而逐漸降的發(fā)展奠定了基礎。低。煤的變質(zhì)程度越深,其內部結構的毛細孔越選擇煤氣化方法時(shí),煤質(zhì)是主要依據。有的氣少,在制漿時(shí)吸附的水相對也少,可以獲得較高濃化方法對煤種的適應性很廣,但也有其限制條件,度的煤漿。不同的煤氣化方法對煤種的要求反應了其技術(shù)特點(diǎn)1成漿難度指數和運行成本等。本文探討適宜氣化煤的基本要求。目前較為通用的評價(jià)煤成漿難易程度的難度指1水分數數學(xué)模型D=7.5+0.5M0.05HGI11內水對成漿的影響式中研究表明,煤的內水含量越高,制得的煤漿濃的哈中國煤化工水分;H為煤度越低。低濃度的水煤漿攜帶過(guò)量的水分進(jìn)入氣化CNMHG≤7,成漿難易度收稿日期:2010-09-01作者簡(jiǎn)介:李磊(193-),男,工程師0l1年3月燃料與化工第42卷第2期Fuel Chemical Processes般;7