Digitec D3221H
解決方案 新模式的570Kg/h二氧化碳膨脹煙絲生產(chǎn)線由秦皇島煙機(jī)公司自行開發(fā)設(shè)計(jì)、制造、安裝。控制系統(tǒng)解決方案采用羅克韋爾自動化公司的ControlLogix控制系統(tǒng)[1],控制網(wǎng)ControlNet和設(shè)備網(wǎng)DeviceNet兩層網(wǎng)絡(luò)技術(shù)。在控制系統(tǒng)中采用ControlLogix 5550處理器,配有1756-CNB控制網(wǎng)接口模塊,用于連接現(xiàn)場6個(gè)ControlLogix 5550 PLC。選用8個(gè)觸摸屏PanelView來進(jìn)行生產(chǎn)操作和參數(shù)調(diào)整,這些觸摸屏通過控制網(wǎng)與PLC連接。選用1784-KTCX個(gè)人計(jì)算機(jī)接口卡,使上位機(jī)通過控制網(wǎng)與PLC連接,上位機(jī)在生產(chǎn)過程中具有在線狀態(tài)監(jiān)視和故障診斷等功能。同時(shí),配有1756-DNB設(shè)備網(wǎng)接口模塊,用于連接25個(gè)分散在現(xiàn)場的1794 FLEX I/O工作站和33個(gè)1336 PLUS II交流變頻器。
生產(chǎn)工藝流程 二氧化碳膨脹煙絲生產(chǎn)工藝流程見圖1。原料(片煙)經(jīng)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(jīng)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(jīng)計(jì)量帶和進(jìn)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(shí),浸入煙絲細(xì)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(jīng)除塵后被工藝風(fēng)機(jī)抽出,大部分送入燃燒爐加熱循環(huán)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(jìn)入冷卻振動輸送機(jī),再經(jīng)過冷卻皮帶輸送機(jī)連續(xù)散熱降溫后,進(jìn)入滾筒式葉絲回潮機(jī)回潮加水后,得到成品膨脹煙絲,其含水率為13%。
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