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href="/">首頁(yè)</a> > <a href="/news/">新聞資訊</a> </div> </div> <div id="1ioqs9g" class="xm-newsdetail container"> <h2>清洗化工生產(chǎn)設備通常采用什么方法</h2> <div id="o9djlej" class="info"><span id="hn0fb3y" class="info-time">發(fā)布日期：2022-12-14 / 點(diǎn)擊次數：<script src=/e/public/ViewClick/?classid=5&id=92&addclick=1></script></span></div> <div id="pdkrdml" class="content"> 清洗化工生產(chǎn)設備通常采用化學(xué)清洗或物理清洗方法。以下兩種清洗工藝的清洗方法介紹?；瘜W(xué)清洗根據管線(xiàn)中污垢的種類(lèi)及清洗的目的可采用不同的清洗工藝?？梢愿鶕煌逑茨康牟捎玫幕瘜W(xué)清洗工藝?；瘜W(xué)清洗目的主要是去除油脂、去除有機聚合物、去除氧化皮以及銅垢泥渣。清洗方法可分為溶劑清洗、乳化清洗、堿洗、堿煮、潤化處理等。<br /><br />物理清洗通過(guò)物理或機械方法對管線(xiàn)表面的污垢給予一定沖擊力使其剝離脫落。采用的方法有高壓水射流清洗、PIG清洗、噴砂清洗、旋轉機械清洗、吸引清洗及超聲波清洗等。<br /><br />1、高壓水射流清洗用小口徑的噴嘴以高壓水連續噴射，靠射流的沖擊力可以去除管道中的污垢和堵塞物。肩壓水射流清洗裝置主要由高壓泵動(dòng)力裝置，壓力調節裝置，高壓管，各種噴槍?zhuān)瑖娮旖M成，可裝在工程車(chē)上，便于現場(chǎng)施工。根據管線(xiàn)內壁附著(zhù)物的硬度，粘著(zhù)性，油性等形態(tài)特點(diǎn)選用不同壓力與不同類(lèi)型的噴槍或噴嘴。對油性，粘著(zhù)性附著(zhù)垢一般選用20～30MPa壓力，硬質(zhì)垢選用30一70MPai對特硬垢或近乎堵塞的管道可采用150MPa或更高壓力。根據清洗對象不同可采用剛性噴桿或柔性噴桿，前者適用于清洗直管，后者適用于曲管。噴桿頭部接有噴嘴。噴嘴有多孔固定型和旋轉型(見(jiàn)第十章有關(guān)圖形)，通過(guò)改變噴嘴孔的大小、形狀、數量、噴射角度、方向可以改變和提高清洗能力。<br /><br />2、機械清洗是用電機或壓縮空氣、高壓水驅動(dòng)使前端的鉆頭發(fā)生旋轉來(lái)清除管內硬質(zhì)或軟質(zhì)污垢的方法。在鉆頭附近噴射出的低壓的水起到冷卻鉆頭、排除污垢的作用。對于不宜用水或酸清洗的污垢可用加壓空氣清除，可燃性污垢不能用加壓空氣可通氮氣清除。清洗硬質(zhì)污垢要用超硬金屬制造的鉆頭，但應注意選擇好與管道內徑相適合的鉆頭以免造成管道內壁損傷。清洗軟質(zhì)污垢時(shí)，鉆桿外徑相對要細些，確保有足夠的排污空間。機械清洗中鉆頭的旋轉是靠撓性軸傳遞的，軸的中心是高壓管，用這種方法可清洗完全堵塞的U型熱交換器。也可以用穗形鋼絲刷代替鉆頭清洗管道，同時(shí)用水把脫落的污垢排掉。<br /><br />3、PIG清洗是用塑料制成的彈丸清洗管道的方法。把彈丸用水壓經(jīng)漸縮管(發(fā)射裝置)壓人被清洗管內，利用彈丸與管壁的摩擦作用清除內壁的污垢。再利用管壁與彈丸接觸面的泄漏反壓水把除去的污垢向前輸送，并從裝在另一側的漸縮管(接受裝置)排出。其后再給漸縮管(接受裝置)加壓，彈丸反向壓入管中并對管道進(jìn)行清洗。彈丸在清洗管中反復進(jìn)行往返運動(dòng)達到清洗污垢目的；目前使用的彈丸是富有彈性可壓縮的高發(fā)泡性聚氨酯材料制成的炮彈狀或球狀體。在其表面可嵌植磨料、鋼絲刷和鐵釘。<br /><br />4、吸引清洗這是利用真空泵直接吸引的清洗方法，它適合于清洗由于液體中懸浮物在流速變動(dòng)與渦流發(fā)生部位堆積成淤泥而造成的管道堵塞，只適合較易清除的污垢。吸引系統中應設置過(guò)濾器，同時(shí)作好排水處理。<br /><br />5、超聲波清洗適合于小型精密機械的管道，如燒結金屬管或微孔過(guò)濾器的清洗。利用水為媒體對清洗管線(xiàn)作超聲波振蕩處理，超聲波產(chǎn)生的空穴和振動(dòng)沖擊作用可去除污垢。<br /><br />6、電化學(xué)清洗對于醫藥、食品、超純水裝置中的管線(xiàn)可采用電化學(xué)清洗。把金屬管-浸入磷酸或硫酸的電解液中，并與直流電源的正極或負極相連(使金屬管線(xiàn)成為電解槽的陽(yáng)極或陰極)，依靠在清洗表面上產(chǎn)生的氧氣或氫氣的掀動(dòng)作用去除附著(zhù)的污垢，這種方法只在特殊情況下使用。<br /><br />7、噴砂清洗是利用石英砂、鋼丸等磨料靠壓縮空氣作高速?lài)娚?，以去除管線(xiàn)內壁銹垢、油脂等污垢的方法，它對小口徑較短管線(xiàn)清洗有較高效率，而對大口徑管道進(jìn)行噴砂清洗需用大量壓縮空氣，現場(chǎng)施工難以實(shí)現，對長(cháng)距離管線(xiàn)由于壓力損失太大也不適合用這種方法。 </div> <div id="3bh3rtv" class="prevprevnextbox"> <div id="0wnpb9r" class="prevnext"> <a href="/news/91.html">上一篇: 石油化工污水處理工藝以及發(fā)展趨</a> 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