EDI膜塊的化學(xué)清洗及再生方法-深圳市慧聰源環(huán)?？萍加邢薰?/title> <link rel="stylesheet" type="text/css" href="/skins/270528/css/style.css"> <script src="/skins/270528/js/jquery-3.6.0.min.js"></script> <link rel="shortcut icon" href="/skins/270528/favicon.ico">  <script type="text/javascript"> document.addEventListener("touchstart", function () { }, true); </script>  <script language="javascript" type="text/javascript"> var nav= '5'; </script>  <script type="application/ld+json"> { "@context": "https://ziyuan.baidu.com/contexts/cambrian.jsonld", "@id": "http:///szhcy-Article-2337457/", "title": "EDI膜塊的化學(xué)清洗及再生方法", "pubDate": "2020-08-17T08:35:08", "upDate": "2020-08-17T08:35:08" }</script> <script language="javaScript" src="/js/JSChat.js"></script><script language="javaScript">function ChatBoxClickGXH() { DoChatBoxClickGXH('https://chat.chem17.com',262687) }</script><script> (function(){ var bp = document.createElement('script'); var curProtocol = window.location.protocol.split(':')[0]; if 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style="color:#5a5a5a">和較高的</span><strong><span style="color:#5a5a5a">pH</span>儀表</strong><span style="color:#5a5a5a">值，將會(huì)加快沉淀的速度。遇到這種情況，我們可以通過化學(xué)清洗的方法對<strong>EDI膜塊</strong>進(jìn)行清洗，使之恢復(fù)到原來的技術(shù)特性。</span></span></span></p><p style="margin-left:0.0000pt; margin-right:0.0000pt"><span style="font-size:14px"><span style="font-family:宋體"><span style="color:#5a5a5a">通常判斷EDI膜塊被污染堵塞可以從以下幾個(gè)方面進(jìn)行評估判定：</span></span></span></p><p style="margin-left:0.0000pt; margin-right:0.0000pt"><span style="font-size:14px"><span style="font-family:宋體"><span style="color:#5a5a5a">1、在進(jìn)水溫度、流量不變的情況下，進(jìn)水側(cè)與產(chǎn)水側(cè)的壓差比原始數(shù)據(jù)升高</span><span style="color:#5a5a5a">45%。</span></span></span></p><p style="margin-left:0.0000pt; margin-right:0.0000pt"><span style="font-size:14px"><span style="font-family:宋體"><span style="color:#5a5a5a">2、在進(jìn)水溫度、流量不變的情況下，濃水進(jìn)水側(cè)與濃水排水側(cè)的壓差比原始數(shù)據(jù)升高45%。</span></span></span></p><p style="margin-left:0.0000pt; margin-right:0.0000pt"><span style="font-size:14px"><span style="font-family:宋體"><span style="color:#5a5a5a">3、在進(jìn)水溫度、流量及電導(dǎo)率不變的情況下，產(chǎn)水水質(zhì)（電阻率）明顯下降。</span></span></span></p><p style="margin-left:0.0000pt; margin-right:0.0000pt"><span style="font-size:14px"><span style="font-family:宋體"><span style="color:#5a5a5a">4、在進(jìn)水溫度、流量不變的情況下，濃水排水流量下降35%。</span></span></span></p><p style="margin-left:0.0000pt; margin-right:0.0000pt"><span style="font-size:14px"><span style="font-family:宋體"><span style="color:#5a5a5a"> 膜塊堵塞的原因主要有下面幾種形式：顆粒/膠體污堵；無機(jī)物污堵；有機(jī)物污堵；微生物污堵。（<strong>EDI</strong></span><span style="color:#5a5a5a"><strong>清洗</strong>注意：在清洗或消毒之前請先選擇合適的化學(xué)藥劑并熟悉安全操作規(guī)程，切不可在組件電源沒有切斷的狀態(tài)下進(jìn)行化學(xué)清洗。）詳細(xì)如下：</span></span></span></p><p style="margin-left:0.0000pt; margin-right:0.0000pt"><span style="font-size:14px"><span style="font-family:宋體"><span style="color:#5a5a5a">1、顆粒/膠體污堵</span></span></span></p><p style="margin-left:0.0000pt; margin-right:0.0000pt"><span style="font-size:14px"><span style="font-family:宋體"><span style="color:#5a5a5a"> 進(jìn)水顆粒度≥5μm</span><span style="color:#5a5a5a">時(shí)會(huì)造成進(jìn)水流道堵塞，引起膜塊內(nèi)部水流分布不均勻，從而導(dǎo)致膜塊整體性能降低。如果EDI膜塊的進(jìn)水不是直接由</span> <span style="color:#5a5a5a">RO</span><span style="color:#5a5a5a">產(chǎn)水端進(jìn)入</span><span style="color:#5a5a5a">EDI</span><span style="color:#5a5a5a">膜塊，而是通過RO產(chǎn)水箱經(jīng)過增壓泵供水，建議在進(jìn)入EDI膜塊前端增設(shè)保安過濾器（≤0.2μm）。在組裝EDI設(shè)備時(shí)，所有的連接管道系統(tǒng)應(yīng)沖洗干凈以預(yù)防管道內(nèi)的顆粒雜質(zhì)進(jìn)入膜塊。</span></span></span></p><p style="margin-left:0.0000pt; margin-right:0.0000pt"><span style="font-size:14px"><span style="font-family:宋體"><span style="color:#5a5a5a">2、無機(jī)物污堵</span></span></span></p><p style="margin-left:0.0000pt; margin-right:0.0000pt"><span style="font-size:14px"><span style="font-family:宋體"><span style="color:#5a5a5a"> 如果</span><span style="color:#5a5a5a">EDI</span><span style="color:#5a5a5a">進(jìn)水含有較多的溶質(zhì)且超出設(shè)計(jì)值或者回收率超過設(shè)計(jì)值時(shí),將導(dǎo)致濃水室和陰極室的結(jié)垢，生成鹽類物質(zhì)析出沉淀，通常結(jié)垢的類型為鈣、鎂離子生成的碳酸鹽。即便這類物質(zhì)的濃度很小，接觸時(shí)間也很短，但隨著運(yùn)行時(shí)間的累加，仍有發(fā)生結(jié)垢的可能，這種硬度結(jié)垢很容易通過酸洗去除。按照方案1中的方法，使用低PH溶液在系統(tǒng)內(nèi)部循環(huán)清洗，可以去除濃水室和陰極室的結(jié)垢。</span></span></span></p><p style="margin-left:0.0000pt; margin-right:0.0000pt"><span style="font-size:14px"><span style="font-family:宋體"><span style="color:#5a5a5a"> 當(dāng)進(jìn)水中的鐵和錳含量高，或者高TDS的水以外進(jìn)入到EDI膜塊時(shí)，也會(huì)使淡水室的離子交換樹脂或者濃水室形成無機(jī)物污堵。3、有機(jī)物污堵</span></span></span></p><p style="margin-left:0.0000pt; margin-right:0.0000pt"><span style="font-size:14px"><span style="font-family:宋體"><span style="color:#5a5a5a"> 當(dāng)進(jìn)水有機(jī)污染物TOC或TEA含量超過設(shè)計(jì)標(biāo)準(zhǔn)時(shí)，淡水室的離子交換樹脂和離子膜會(huì)發(fā)生有機(jī)污堵。</span></span></span></p> </div> <div id="qprrcczb" class="ly_PrevNext"> <ul> <li>上一篇：<a href="/szhcy-Article-2340543/">抽吸式氧化鋯氧分析器</a></li> <li>下一篇：<a 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