粉體氣力輸送機采用(yong)密(mi)封(feng)(feng)管(guan)道輸(shu)(shu)送物料(liao)。在運輸(shu)(shu)過程中，由于(yu)物料(liao)的(de)(de)性(xing)質和(he)空(kong)氣流量的(de)(de)大(da)小(xiao)，可(ke)能(neng)會造成物料(liao)堵塞和(he)管(guan)道堵塞的(de)(de)現象。管(guan)道空(kong)間有限，又是密(mi)封(feng)(feng)的(de)(de)，疏(shu)(shu)通和(he)清理(li)會有很多不便。粉體氣力輸(shu)(shu)送管(guan)道疏(shu)(shu)通需要注意哪些問題？

       1.由于低速平推流氣力輸送系統的氣力輸送機在正常情況下一臺鍋爐(lu)需要兩根(gen)以上的輸送(song)管(guan)道(dao)(dao)，具備了采用正吹反抽疏(shu)通管(guan)道(dao)(dao)裝置的條(tiao)件(jian)。氣力輸送(song)泵裝置比供(gong)氣環(huan)對輸送(song)管(guan)道(dao)(dao)的疏(shu)通更(geng)有效，疏(shu)通速(su)度更(geng)快。

       2.在管道(dao)的始(shi)端設置氣(qi)動(dong)直吹蝶閥(fa)、氣(qi)動(dong)反(fan)抽球(qiu)閥(fa)和管道(dao)的壓力開關，組成管道(dao)疏通裝置，由PLC程序(xu)控(kong)制。

       3.當輸(shu)(shu)送(song)(song)(song)管(guan)道(dao)(dao)(dao)的壓(ya)力開關輸(shu)(shu)出(chu)(chu)超高信(xin)號時(shi)，關閉(bi)L型(xing)倉泵的氣動(dong)進(jin)口閥(fa)，打開氣動(dong)反(fan)抽(chou)球閥(fa)，利用鍋(guo)爐尾部煙(yan)道(dao)(dao)(dao)內(nei)的負壓(ya)反(fan)抽(chou)輸(shu)(shu)送(song)(song)(song)管(guan)道(dao)(dao)(dao)內(nei)的干灰，時(shi)間為30s。此時(shi)，如果輸(shu)(shu)送(song)(song)(song)管(guan)道(dao)(dao)(dao)內(nei)的壓(ya)力仍未降(jiang)至(zhi)正常(chang)值，則關閉(bi)反(fan)抽(chou)氣動(dong)球閥(fa)，打開氣動(dong)正吹蝶(die)閥(fa)，通過輸(shu)(shu)送(song)(song)(song)壓(ya)縮空氣對輸(shu)(shu)送(song)(song)(song)管(guan)道(dao)(dao)(dao)進(jin)行(xing)加(jia)壓(ya)，進(jin)行(xing)氣力輸(shu)(shu)送(song)(song)(song)。正吹時(shi)間為90 s，反(fan)抽(chou)和正吹重(zhong)復進(jin)行(xing)，直(zhi)至(zhi)輸(shu)(shu)送(song)(song)(song)管(guan)道(dao)(dao)(dao)內(nei)壓(ya)力恢復正常(chang)，輸(shu)(shu)送(song)(song)(song)管(guan)道(dao)(dao)(dao)壓(ya)力開關輸(shu)(shu)出(chu)(chu)信(xin)號，自動(dong)解除管(guan)道(dao)(dao)(dao)疏通程序，恢復L型(xing)倉泵正常(chang)運行(xing)程序。

      4.輸送系統正(zheng)常運行時，氣動(dong)直吹蝶閥和氣動(dong)反抽(chou)球閥關(guan)閉。

TAGS：粉體氣力輸送機  氣力輸送機  料封泵  

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