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    斗式提升機粉塵爆炸有哪些防治措施
    作者:    發布日期:2017-08-22      關注次數:390     二維碼分享

    目前提出的有關措施大致包括以下幾方面:

    1、通風除塵

        為降低都是提升機罩殼內的粉塵濃度,可在提升機的裝料口和卸料口附近加設除塵吸口,據國外試驗資料介紹,吸口為止可在裝料口上方一定距離處從罩殼兩側吸氣,使吸氣取得最佳效果并可避免谷物進入吸管。

    2、消除引燃源

        明火操作、電器火花、雷擊、機械摩擦發熱、金屬物的撞擊火花、靜電等都可能引起粉塵爆炸。在都是提升機內,特別要注意機械摩擦、金屬撞擊和靜電等問題。采取的措施包括:使斗式提升機的牽引膠帶保持適當的張力,采取對中裝置,防治膠帶跑偏,防治金屬料斗碰擦機殼;采用磁性篩選,除去谷物中的鐵片雜物,以免發生雜物與機械碰擊,采取可靠的靜電接地措施,不用導電性較差的材料制作料斗,以免大量靜電集聚;在驅動軸上加裝速度監測器,當運轉速度低于正常速度時,監測器即發出警報或通過與主電路聯鎖而切斷電源,這樣可避免因牽引膠帶在驅動滾筒上打滑引起的摩擦發熱。此外,在可適當選擇帶速參數,為提高生產率,用加大料斗的方法而不選過高的帶速,這對運轉不穩、減少摩擦發熱有利。

    3、抑制粉塵爆炸

        目前已經提出和正在研究一些可抑制爆炸的設計方案。例如將提升機的頭部頂蓋設計成活動性,且頂蓋最好伸出屋頂,一旦發生爆炸,可以將蓋頂迅速掀開,以減小爆炸壓力。

    4、改進設計布局

        盡量將斗式提升機獨立安裝在圓筒倉外,并盡量避免提升機的進出口與糧倉密閉相通,以便發生第一次爆炸后,爆炸氣浪不直接從密封管道引入圓筒倉而形成第二次爆炸。


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