Digitec D3221H
解決方案 新模式的570Kg/h二氧化碳膨脹煙絲生產線由秦皇島煙機公司自行開發設計、制造、安裝??刂葡到y解決方案采用羅克韋爾自動化公司的ControlLogix控制系統[1],控制網ControlNet和設備網DeviceNet兩層網絡技術。在控制系統中采用ControlLogix 5550處理器,配有1756-CNB控制網接口模塊,用于連接現場6個ControlLogix 5550 PLC。選用8個觸摸屏PanelView來進行生產操作和參數調整,這些觸摸屏通過控制網與PLC連接。選用1784-KTCX個人計算機接口卡,使上位機通過控制網與PLC連接,上位機在生產過程中具有在線狀態監視和故障診斷等功能。同時,配有1756-DNB設備網接口模塊,用于連接25個分散在現場的1794 FLEX I/O工作站和33個1336 PLUS II交流變頻器。
生產工藝流程 二氧化碳膨脹煙絲生產工藝流程見圖1。原料(片煙)經切片,回潮,儲存,切絲,定量稱重(含水20%的)煙絲后,周期性地送入浸漬器。經浸漬器加工后的干冰煙絲通過松散器打散后,落入振動柜。通過振動柜振動將干冰煙絲經計量帶和進料空氣鎖均勻送入升華器。在升華器中干冰煙絲與350℃左右工藝氣體(蒸汽、二氧化碳、空氣)接觸時,浸入煙絲細胞中固體二氧化碳使煙絲體積迅速膨脹。膨脹后煙絲通過切向分離器與工藝氣體分離,工藝氣體經除塵后被工藝風機抽出,大部分送入燃燒爐加熱循環使用,少量的送入燃燒爐焚燒掉。被切向分離器分離出的膨脹煙絲通過出料空氣鎖進入冷卻振動輸送機,再經過冷卻皮帶輸送機連續散熱降溫后,進入滾筒式葉絲回潮機回潮加水后,得到成品膨脹煙絲,其含水率為13%。
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