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class="dbg-bg fr">  <div id="gckskyy0k" class="page-news clearfix"> <div class="gckskyy0k" id="shownews"> <h1 class="title">如何使用化學(xué)溶液清洗鍋爐</h1> <div id="gckskyy0k" class="hits"> 更新時(shí)間：20/03/10 18:06:03 來(lái)源：<a href="http://"></a> <span style="float:left;">分享: </span> <span> <div class="bdsharebuttonbox" style="float:right;"> <a href="#" class="bds_more" data-cmd="more"></a> <a title="分享到QQ空間" href="#" class="bds_qzone" data-cmd="qzone"></a> <a title="分享到新浪微博" href="#" class="bds_tsina" data-cmd="tsina"></a> <a title="分享到騰訊微博" href="#" class="bds_tqq" data-cmd="tqq"></a> <a title="分享到人人網(wǎng)" href="#" class="bds_renren" data-cmd="renren"></a> <a title="分享到微信" href="#" class="bds_weixin" data-cmd="weixin"></a> </div> <script>window._bd_share_config={"common":{"bdSnsKey":{},"bdText":"","bdMini":"2","bdPic":"","bdUrl":'http:///article/show/sid/697/id/445.html',"bdStyle":"0","bdSize":"16"},"share":{}};with(document)0[(getElementsByTagName('head')[0]||body).appendChild(createElement('script')).src='http://bdimg.share.baidu.com/static/api/js/share.js?v=89860593.js?cdnversion='+~(-new Date()/36e5)];</script> </span> </div> <ul style=" margin:10px 0px;"> </ul> <div id="gckskyy0k" class="text editor">　　用化學(xué)溶液清洗鍋爐的目的是清除鍋爐內(nèi)部的銹皮和垢物，多采用酸性溶液來(lái)清洗。<br /> 　　無(wú)色的檸檬酸氨溶液內(nèi)溶有氧化鐵時(shí)，顏色變成淺黃綠色，如果顏色變成黃褐色，表明其pH值達(dá)到6～6.5，證明檸檬酸氫已消耗完。為使溶液中的溶解鐵保持穩(wěn)定，可以再加些檸檬酸或檸檬酸氨。附表9中所建議的檸檬酸用量是能夠滿(mǎn)足要求的，一般還能保持剩余的檸檬酸氨量，以防止溶液的pH值升到6～6.5。當(dāng)pH值達(dá)到此值時(shí)，須另加檸檬酸量。<br /> 　　鍋爐污垢的成份有：氧化鐵、銅和氧化銅以及各種鹽類(lèi)的垢，對(duì)于污垢要經(jīng)過(guò)化學(xué)分析，選用合適的酸來(lái)清洗。所用的溶液仍可參考附表中的配方，在此基礎(chǔ)上再增加以下的物質(zhì)：<br /> 　　（1）二氯化氨：用以清除硅鹽垢。每10kg檸檬酸中要配Ikg二氯化氨。當(dāng)清洗溶液中有0.5％的二氯化氨，在清洗過(guò)程中就要十分小心，不要去接觸溶液。有時(shí)要把二氯化氨加到強(qiáng)酸（高濃度檸檬酸）中，此時(shí)會(huì)有氯化氫逸出，這是一種致命的高腐蝕性氣體，不宜吸入此氣。操作時(shí)要加強(qiáng)通風(fēng)，人員離開(kāi)此區(qū)，直到所有氟化氫都散走為止。<br /> 　　（2）硝酸鈉（Na2NO3）：起初也需要每10kg檸檬酸中配Ikg硝酸鈉，用以清除銅。應(yīng)該注意的是要防止產(chǎn)生二氧化氮，所以一定要在溶液的pH值達(dá)到9.5～10，確定是堿性溶液，才能將硝酸鈉加到檸檬酸氨中。<br /> 　　小編：wxy<br /></div> <div id="gckskyy0k" class="page" style="clear:both;"> 上一條：<a href="http:///news/dongtai/show447.html">鍋爐壓力系統(tǒng)的分層</a><br> 下一條：<a href="http:///news/dongtai/show444.html">余熱鍋爐的煮爐目的與操作方法</a><br> </div> <h4 class="related"><span style="font-weight:bold;height:30px;line-height:30px;font-size:13px; color:#fff; padding-left:10px">相關(guān)資料</span></h4> <ul class="related-list"> <li><a target="_blank" title="余熱鍋爐的結(jié)構(gòu)設(shè)計(jì)" href="http:///news/dongtai/show439.html">余熱鍋爐的結(jié)構(gòu)設(shè)計(jì)</a></li><li><a target="_blank" title="余熱鍋爐為什么要進(jìn)行排污" 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