IC660EBA100
IC660EBA100
IC660EBA100
水泥工業(yè)是耗能大戶，它面臨著節(jié)能降耗的艱巨任務,特別是現(xiàn)今的新型干法水泥生產線，規(guī)模越來越大，節(jié)能空間也越來越大，全廠的風機裝機容量約占全廠總裝機功率的30－40%，耗電量約占整個廠用電量30%－40%；隨著輥式磨系統(tǒng)越來越多地被采用，風機耗電占總耗電量的比重也越來越大。風機的選型是按照滿負荷狀態(tài)設計的，而實際生產過程中隨工況和產量的變化，會引起風量、風壓隨機調整，眾所周知風機是屬于平方率負載，如將風機的傳動系統(tǒng)換成交流調速系統(tǒng)，通過調整電機轉速，滿足風機的不同工作狀態(tài)下的風量和風壓，就能把消耗在檔板和閥門上的能量節(jié)省下來，節(jié)能空間和效果是很可觀的，京蘭三源水泥有限公司是一條2000T/D的水泥生產線，其生料磨循環(huán)風機電機為10KV/630KW，采用擋板（閥門）調節(jié)風量大小，風機消耗功率大，節(jié)流損失較大。調節(jié)風門擋板控制風量，由于擋板處于較高壓力下工作，易磨損，易造成管道內風量調節(jié)不準確，對生料磨系統(tǒng)工藝影響也較大。
生料磨循環(huán)風機在生料磨系統(tǒng)中起到很大作用，通過調節(jié)循環(huán)風機可以控制磨系統(tǒng)的以下參數(shù)：
1、磨內通風量：立磨靠風掃磨，通風量要適當。風量不足，合格的生料不能及時帶出，料層增厚，排渣量增多，設備負荷高，產量降低；風量過大，料層過薄，影響磨機穩(wěn)定運轉。
2、料層厚度：立磨穩(wěn)定運轉的另一重要因素是料床穩(wěn)定。料層穩(wěn)定，風量、風壓和喂料量才能穩(wěn)定，否則就要通過調節(jié)風量和喂料量來維持料層厚度。若調節(jié)不及時就會引起震動加劇，電機負荷上升或系統(tǒng)跳停等問題。
3、磨機振動：振動是輥式磨機工作中普遍存在的一個現(xiàn)象,合理的振動是允許的,但若振動過大，則會造成磨盤和磨輥以及襯板的機械損壞。
4、磨內壓差：壓差是指風環(huán)處的壓力損失,在磨機運行時，磨內負荷量的變化不僅從磨機電流、料層厚度、振動幅度等參數(shù)上反應出來，而且壓差更能反映磨內狀況。
5、磨機出口溫度：有效的控制出口溫度，可以保持良好的烘干及粉磨作業(yè)條件。
6、產品細度：磨內通風量的大小對產品細度也有一定影響。
另外磨的運行穩(wěn)定因素還有喂料量、噴水量、研磨壓力、循環(huán)風量和選粉機轉速等參數(shù)。
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