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      滾筒篩是分選技術(shù)中應(yīng)用非常廣泛的一種機(jī)械,是通過對(duì)顆粒粒徑大小來控制垃圾分選的,分選精度高。滾筒篩的筒體一般分幾段,可視具體情況而定,篩孔由小到大排列,每一段上的篩孔孔徑相同。
      滾筒篩主要有電機(jī)、減速機(jī)、滾筒裝置、機(jī)架、密封蓋、進(jìn)出料口組成。滾筒段是通過螺母、螺釘與滾筒篩轉(zhuǎn)盤相連接的,因此滾筒段的安裝與拆卸比較方便。由于滾筒段與轉(zhuǎn)盤相連,當(dāng)轉(zhuǎn)盤在驅(qū)動(dòng)裝置的驅(qū)動(dòng)下而發(fā)生轉(zhuǎn)動(dòng)時(shí),滾筒段也跟著一起轉(zhuǎn)動(dòng)。
      滾筒共分三段,每段長80cm,直徑60cm,孔徑分別為13mm、50mm、200mm。其中一段的透篩成分主要是細(xì)顆粒的煤灰、泥土等,還有細(xì)小的金屬顆粒;二段的透篩成分主要包括小磚塊、石塊、部分塑料、紙張等;第三段的透篩成分有紙張、塑料、竹木、橡膠等。滾筒篩的使用為后續(xù)風(fēng)選創(chuàng)造了非常有利的條件。每段滾筒都是用螺母與螺釘固定在轉(zhuǎn)盤上的,這為滾筒的拆卸帶來很大的方便。滾筒篩的滾筒采用這樣的形式連接有一定的優(yōu)越性。如果滾筒采用整體形式而非分段形式的話,加工會(huì)有不小的困難。因?yàn)檎麄€(gè)滾筒分三段,總共長達(dá)2.4m,如果在一整塊鋼板上打孔的話,鋼板分量非常重,而且卷板也非常困難,更不便于安裝;而如果將三段分開加工,則分量輕很多,更易于卷板安裝,而且還可以根據(jù)垃圾的實(shí)際顆粒大小來選擇更為合適的孔徑,有助于提高篩分效率。
      滾筒篩通常都是在露天環(huán)境下進(jìn)行生產(chǎn)的,因此篩網(wǎng)會(huì)因?yàn)橄掠辍⒊睗竦仍蛏P。那么滾筒篩的篩網(wǎng)生銹了怎么辦,怎樣防銹和除銹呢?主要有以下幾點(diǎn)方面的知識(shí):
     1、放置在合適的地方
     滾筒篩容易生銹,主要因?yàn)槁短焐a(chǎn),要從根本上解決生銹問題,可采用封閉生產(chǎn),或放置在相對(duì)干凈、干燥的環(huán)境中,可減少與空氣水的接觸,解決生銹問題,也可減少粉塵污染問題。
     2、設(shè)置隔離層
     滾筒篩篩網(wǎng)生銹的主要原因是表面和空氣中的水產(chǎn)生化學(xué)反應(yīng)。因此可以設(shè)置隔離層,將振動(dòng)篩的篩網(wǎng)與空氣隔離。另外可以在篩網(wǎng)上涂抹油漆、機(jī)油等,或采用熱鍍、電鍍等鍍上耐腐蝕金屬,通常形成氧化膜,隔離空氣對(duì)篩網(wǎng)的腐蝕,做好防銹工作,減少銹蝕。
     3、進(jìn)行污垢和油垢的清潔工作
     使用一段時(shí)間后,油垢或污垢會(huì)附著在表面。若未及時(shí)清洗,會(huì)產(chǎn)生生銹。所以在使用后,應(yīng)及時(shí)清理篩網(wǎng)上的雜質(zhì)。可用肥皂、溫水或弱洗滌劑進(jìn)行清洗。若有油污,可以用軟布擦洗,在用洗滌劑清洗。如果振動(dòng)篩表面有銹跡,可用硝酸鹽等除銹物品清洗。
      以上介紹了滾筒篩生銹的原因和解決方案。生銹不僅會(huì)影響生產(chǎn)效率,還會(huì)影響整個(gè)生產(chǎn)線的生產(chǎn)效率。因此發(fā)現(xiàn)有生銹情況,應(yīng)及時(shí)處理。

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