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class="NyNewsdetail_con"> <p><span style="font-size:10.5000pt"><span style="font-family:宋體">通常是用</span></span><strong><span style="font-size:10.5pt"><span style="font-family:宋體">工業(yè)pH計</span></span></strong><span style="font-size:10.5000pt"><span style="font-family:宋體">和</span></span><strong><span style="font-size:10.5pt"><span style="font-family:宋體">工業(yè)電導(dǎo)儀</span></span></strong><span style="font-size:10.5000pt"><span style="font-family:宋體">在線監(jiān)測鍋水的pH值和</span></span><strong><span style="font-size:10.5pt"><span style="font-family:宋體">電導(dǎo)率</span></span></strong><span style="font-size:10.5000pt"><span style="font-family:宋體">，其作用主要有以下兩點。 </span></span></p><p><span style="font-size:10.5000pt"><span style="font-family:宋體"> ①在汽包爐中，有時爐水的pH值顯著上升到超過PO</span></span><sup><span style="font-size:10.5000pt"><span style="font-family:宋體">3-</span></span></sup><sub><span style="font-size:10.5000pt"><span style="font-family:宋體">4</span></span></sub><span style="font-size:10.5000pt"><span style="font-family:宋體">濃度所對應(yīng)的pH理論值。測定的堿度中，酚酞堿度要大于甲基橙堿度。很明顯，爐水中存在著大量的游離NaOH ,游離NaOH的來源之一補給水，即陽床漏鈉嚴(yán)重或陰床帶出的殘存的NaOH;來源之二是凝結(jié)水，即凝汽器泄漏嚴(yán)重，冷卻水中漏入的碳酸氫鈉、碳酸鈉氫在高溫下分解生成CO</span></span><sub><span style="font-size:10.5000pt"><span style="font-family:宋體">2</span></span></sub><span style="font-size:10.5000pt"><span style="font-family:宋體">和NaOH; 另一個原因是鹽類隱藏(暫時消失)現(xiàn)象造成的。當(dāng)爐水中游離NaOH過高時，應(yīng)查明原因，使水處理系統(tǒng)盡量減少漏鈉，如凝汽器泄漏，應(yīng)及早堵漏。采取措施后，若pH值仍過高時，可向爐水中添加磷酸氫鈉來調(diào)節(jié)爐水的pH值。爐水的pH值由</span></span><strong><span style="font-size:10.5pt"><span style="font-family:宋體">工業(yè)pH計</span></span></strong><span style="font-size:10.5000pt"><span style="font-family:宋體">監(jiān)測。磷酸鹽在線監(jiān)測在許多大型鍋爐的鍋水水質(zhì)監(jiān)測及自動加藥控制中，也得到普遍應(yīng)用。</span></span></p><p><span style="font-size:10.5000pt"><span style="font-family:宋體"> ②為了使?fàn)t水的含鹽量和含硅量能維持在極限容許值以下，以及排除爐水中的的水渣，在汽包爐運行時，必須適時、適量地排放掉一部分含雜質(zhì)量較大的爐水，并補入相同量地給水，這一操作稱為排污。爐水的含鹽量和含硅量由</span></span><strong><span style="font-size:10.5pt"><span style="font-family:宋體">工業(yè)電導(dǎo)儀</span></span></strong><span style="font-size:10.5000pt"><span style="font-family:宋體">監(jiān)測。</span></span></p> </div> <div id="gg8ay2o2gygi" class="ly_PrevNext"> <ul> <li>上一篇：<a href="/szhcy-Article-2031963/">污水處理工藝簡述</a></li> <li>下一篇：<a href="/szhcy-Article-2030525/">陶氏FILMTEC膜元件可以用于濃縮或純化有機溶劑嗎?</a></li> </ul> </div> </div>   <div id="gg8ay2o2gygi" class="foot_box"> <div id="gg8ay2o2gygi" class="foot_t"> <div id="gg8ay2o2gygi" class="w1200"> <a href="/">網(wǎng)站首頁</a>　|　<a href="/aboutus.html">關(guān)于我們</a>　|　<a href="/products.html">產(chǎn)品中心</a>　|　<a href="/news.html">新聞動態(tài)</a>　|　<a href="/article.html">技術(shù)文章</a>　|　<a href="/honor.html">榮譽資質(zhì)</a>　|　<a href="/order.html" target="_blank">在線留言</a>　|　<a href="/contact.html">聯(lián)系我們</a> <span><a href="javascript:;" 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