国产日产久久高清欧美一区_工業(yè)中關(guān)于有毒氣體檢測儀的應用分析-深圳市華誼環(huán)?？萍加邢薰?/title> <meta name="keywords" content="氰化氫氣體報警器　砷化氫氣體報警器　氟化氫氣體報警器　溴氣氣體報警器　一氧化氮氣體報警器　二氧化氮氣體報警器　氮氧化物氣體報警器　二氧化氯氣體報警器　硅烷氣體報警器　二硫化碳氣體報警器"> <meta name="description" content=""> <link rel="stylesheet" href="/template/1/372/css/animate.min.css"> <link rel="stylesheet" href="/template/1/372/css/reset.css"> <link rel="stylesheet" href="/template/1/372/css/head.css"> <link rel="stylesheet" href="/template/1/372/css/main.css"> <style> body { background: #f1f2f4; } .ny-fenl { display: none; } </style> <meta http-equiv="Cache-Control" content="no-transform" /> <meta http-equiv="Cache-Control" content="no-siteapp" /> </head> <body> <h1><a href="http://www.mikuduo.com/">免费成年人视频在线观看|亚洲精品自偷自拍无码|国产又大又硬又粗|国产精品入口麻豆电影网|日韩精品欧美高清区|51国产偷自视频区视频手机播器</a></h1><div id="lpaiw" class="pl_css_ganrao" style="display: none;"><center id="lpaiw"><source id="lpaiw"><tt id="lpaiw"><nav id="lpaiw"></nav></tt></source></center><wbr id="lpaiw"><track 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href="/html/web/jiejuefangan2/index.html" class="ms-channel-path-link"> 解決方案 </a> </div> </div> </div> <div id="rwoh1ikca" class="center"> <div id="rwoh1ikca" class="main-fr fl main-fr-pro"> <div id="rwoh1ikca" class="box"> <b class="mab">解決方案</b> <ul class="fl-pro"> </ul> </div> <div id="rwoh1ikca" class="box"> <b>熱門(mén)資訊</b> <dl> </dl> </div> </div> <div id="rwoh1ikca" class="main-fl fr"> <div id="rwoh1ikca" class="show-pro1"> <div id="rwoh1ikca" class="imgfd"><img src="/upload/1/cms/content/1705376814480.png" alt="工業(yè)中關(guān)于有毒氣體檢測儀的應用分析"></div> <div id="rwoh1ikca" class="txt"> <div id="rwoh1ikca" class="box"> <h1>工業(yè)中關(guān)于有毒氣體檢測儀的應用分析</h1> <div id="rwoh1ikca" class="des"> </div> <a class="ind-more">聯(lián)系我們 →</a> </div> </div> </div> <div id="rwoh1ikca" class="c"></div> <div id="rwoh1ikca" class="show-pro2"> <div id="rwoh1ikca" class="box"> <div id="rwoh1ikca" class="tit-pro"><span>詳情介紹</span></div> <div id="rwoh1ikca" class="des" id="maximg"> <p><span style="font-family: 宋體;letter-spacing: 0;font-size: 19px;background: rgb(255, 255, 255)"><span style="font-family:宋體">　　根據危害，我們將有毒有害氣體分為可燃氣體和有毒氣體兩大類(lèi)。由于它們性質(zhì)和危害不同，其偵測手段也有所不同。首先是對于有毒有害氣體檢測儀的分類(lèi)和原理：氣體檢測儀的關(guān)鍵部件是探頭。</span></span><span style="font-family: 宋體;letter-spacing: 0;font-size: 19px;background: rgb(255, 255, 255)"><br/></span><span style="font-family: 宋體;letter-spacing: 0;font-size: 19px;background: rgb(255, 255, 255)"><span style="font-family:宋體">　　可燃氣體檢測儀</span> <span style="font-family:宋體">對于可燃氣體是石油化工等工業(yè)場(chǎng)合遇到最多的危險氣體，它主要是烷烴等有機氣體和某些無(wú)機氣體：如一氧化碳等?？扇細怏w發(fā)生爆炸必須具備一定的條件，那就是：一定濃度的可燃氣體，一定量的氧氣以及足夠熱量點(diǎn)燃它們的火源，這就是爆炸三要素，缺一不可，也就是說(shuō)，缺少其中任何一個(gè)條件都不會(huì )引起火災和爆炸。</span> <span style="font-family:宋體">當可燃氣體（蒸汽、粉塵）和氧氣混合并達到一定濃度時(shí)，遇具有一定溫度的火源就會(huì )發(fā)生爆炸。</span></span></p><p style="margin-top:0;margin-right:0;margin-bottom:0;margin-left:0;text-indent:0;padding:0 0 0 0 ;line-height:27px;background:rgb(255,255,255)"><span style="font-family: 宋體;color: rgb(102, 100, 100);letter-spacing: 0;font-size: 19px"><span style="font-family:宋體">　　我們把可燃氣體遇火源發(fā)生爆炸的濃度稱(chēng)為爆炸濃度極限，簡(jiǎn)稱(chēng)爆炸極限，一般用</span><span style="font-family:宋體">%表示。實(shí)際上，這種混合物也不是在任何混合比例上都會(huì )發(fā)生爆炸而要有一個(gè)濃度范圍。當可燃氣體濃度低于LEL（最低爆炸限度）時(shí)（可燃氣體濃度不足）和其濃度高于UEL最高爆炸限度）時(shí)（氧氣不足）都不會(huì )發(fā)生爆炸。不同的可燃氣體的LEL和UEL都各不相同，這一點(diǎn)在標定儀器時(shí)要十分注意。為安全起見(jiàn)，一般我們應當在可燃氣體濃度在LEL的10%和20%時(shí)發(fā)出警報，這里，10%LEL稱(chēng)。作警告報警，而20%LEL稱(chēng)作危險報警。這也就是我們將可燃氣體檢測儀又稱(chēng)作LEL檢測儀的原因。</span></span></p><p><span style="font-family: 宋體;letter-spacing: 0;font-size: 19px;background: rgb(255, 255, 255)"><span style="font-family:宋體">需要說(shuō)明的是，</span><span style="font-family:宋體">LEL檢測儀上顯示的100%不是可燃氣體的濃度達到氣體體積的100%，而是達到了LEL的式100%，即相當于可燃氣體的最低爆炸下限，如果是甲烷，100%LEL=4%體積濃度（VOL）.在工作中，以L(fǎng)EL方測量這些氣體的偵測器是我們常見(jiàn)的催化燃燒式檢測儀。</span></span><span style="font-family: 宋體;letter-spacing: 0;font-size: 19px;background: rgb(255, 255, 255)"><br/></span><span style="font-family: 宋體;letter-spacing: 0;font-size: 19px;background: rgb(255, 255, 255)"><span style="font-family:宋體">　　它的原理是一個(gè)雙路電橋（一般稱(chēng)作惠斯通電橋）偵測單元。在這其中的一個(gè)鉑金絲電橋上涂有催化燃燒物質(zhì)，不論何種易燃氣體，只要它能夠被電極引燃，鉑金絲電橋的電阻就會(huì )由于溫度變化發(fā)生改變，這種電阻變化同可燃氣體的濃度成一定比例，通過(guò)儀器的電路系統和微處理機可以計算出可燃氣體的濃度。</span></span><span style="font-family: 宋體;letter-spacing: 0;font-size: 19px;background: rgb(255, 255, 255)"><br/></span><span style="font-family: 宋體;letter-spacing: 0;font-size: 19px;background: rgb(255, 255, 255)"><span style="font-family:宋體">直接測量可燃氣體的體積濃度的熱導式檢測儀也可以在市場(chǎng)上得到，同時(shí)，也已經(jīng)有了</span><span style="font-family:宋體">LEL/VOL合二為一的檢測儀?？扇紮z測儀特別適合于在缺氧（氧氣不足）的環(huán)境中測量可燃氣體的體積（VOL）濃度。有毒氣體既可以存在于生產(chǎn)原料中，如大多數的有機化學(xué)物質(zhì)（VOC），也可能存在于生產(chǎn)過(guò)程的各個(gè)環(huán)節的副產(chǎn)品中，如氨、一氧化碳、硫化氫等等。它們是對工作人員造成危害最大的危險因素。這種危害不僅包括立即的傷害，如身體不適、發(fā)病、死亡等等，而且包括對于人體長(cháng)期的危害，如致殘、癌變等等。對于這些有毒有害氣體的偵測是我們發(fā)展中國家應當開(kāi)始引起充分重視的問(wèn)題。</span></span></p><p><span style="font-family: 宋體;color: rgb(51, 51, 51);letter-spacing: 0;font-size: 19px;background: rgb(255, 255, 255)"><span style="font-family:宋體">有毒氣體的檢測</span></span></p><p><span style="font-family: 宋體;color: rgb(51, 51, 51);letter-spacing: 0;font-size: 19px;background: rgb(255, 255, 255)"><span style="font-family:宋體">　　隨氣體種類(lèi)不同，對于特定的有毒氣體的偵測，我們使用最多的是專(zhuān)用探頭。它可以包括上面。所列的所有探頭，也包括前兩章所介紹的光離子化檢測儀。其中，偵測無(wú)機氣體最為普遍、技術(shù)相對成熟、綜合指標最好的方法是定電位電解式方法，也就是我們常說(shuō)的電化學(xué)探頭。</span> <span style="font-family:宋體">電化學(xué)探頭的構成是：將兩個(gè)反應電極</span><span style="font-family:宋體">--工作電極和對電極以及一個(gè)參比電極放置在特定電解液中，然后在反應電極之間加上足夠的電壓，使透過(guò)涂有重金屬催化劑薄膜的待測氣體進(jìn)行氧化還原反應，再通過(guò)儀器中的電路系統測量氣體電解時(shí)產(chǎn)生的電流，然后由其中的微處理器計算出氣體的濃度。</span></span></p><p><span style="font-family: 宋體;color: rgb(51, 51, 51);letter-spacing: 0;font-size: 19px;background: rgb(255, 255, 255)"><span style="font-family:宋體">　　目前，可以偵測到特定氣體的電化學(xué)探頭包括：一氧化碳、硫化氫、二氧化硫、一氧化氮、二氧化氮、氨氣、氯氣、氰氫酸、環(huán)氧乙烷、氯化氫等等。偵測</span><span style="font-family:宋體">VOC偵測器可以使用前章介紹的光離子化探頭。氧氣也是在工業(yè)環(huán)境中，尤其是密死循環(huán)境中需要十分注意因素。一般我們將氧氣含量超過(guò)23.5%稱(chēng)為氧氣過(guò)量(富氧)，此時(shí)很容易發(fā)生爆炸的危險；而氧氣含量低于19.5%為氧氣不足（缺氧），此時(shí)很容易發(fā)生工人窒息、昏迷以至死亡的危險。正常的氧氣含量應當在20.9%左右。氧氣偵測儀也是電化學(xué)探頭的一種。目前我們對于可以引起急性中毒的氣體，比如硫化氫、氰氫酸等的偵測較為重視，但對于可以引起慢性中毒的氣體，比如芳香烴、醇類(lèi)等的偵測重視不夠，其實(shí)后者對于工人健康和安全的危害絲毫不遜于可以引起急性中毒的氣體！它們可能引起癌變和其它的隱形病癥，影響工人的壽命和健康。這種現象的出現，除了認識上的原因以外，以前市場(chǎng)上缺乏合適的、可以偵測較低濃度的有機氣體檢測儀也是一個(gè)重要的原因。</span></span><span style="font-family: 宋體;letter-spacing: 0;font-size: 19px;background: rgb(255, 255, 255)"><br/></span><span style="font-family: 宋體;color: rgb(51, 51, 51);letter-spacing: 0;font-size: 19px;background: rgb(255, 255, 255)"><span style="font-family:宋體">隨著(zhù)科學(xué)技術(shù)水準的發(fā)展和人們健康認識的提高，人們已經(jīng)不滿(mǎn)足于僅僅</span><span style="font-family:宋體">"高高興興上班來(lái)，平平安安回家去"，而是追求著(zhù)更高的生活質(zhì)量和生活條件。人們不僅關(guān)心著(zhù)今日的工作，更關(guān)心著(zhù)明天----退休以后的生活。</span></span><span style="font-family: 宋體;letter-spacing: 0;font-size: 19px;background: rgb(255, 255, 255)"><br/></span><span style="font-family: 宋體;color: rgb(51, 51, 51);letter-spacing: 0;font-size: 19px;background: rgb(255, 255, 255)"><span style="font-family:宋體">　　因此在工業(yè)衛生和工業(yè)安全工作中要不斷地引入新觀(guān)念、新思路才能不僅要避免眼前的危險發(fā)生，而更要注意避免日后悲劇的發(fā)生，所有這些，都需要通過(guò)法規制定和人們素質(zhì)的提高得到不斷地改善和提高。以上就是對于在工業(yè)中關(guān)于有毒氣體檢測儀的應用分析。</span></span></p><p><br/></p> </div> </div> </div> <div id="rwoh1ikca" class="show-pro2"> <div id="rwoh1ikca" class="box"> <div id="rwoh1ikca" class="tit-pro"><span>相關(guān)內容</span></div> <ul class="xgcp"> <li><a href="/html/web/jiejuefangan2/1768566962954366978.html"> <div id="rwoh1ikca" class="imgfd"><img src="/upload/1/cms/content/1710493420071.png" alt=""></div> <h3>VOC在線(xiàn)監測系統在化工廠(chǎng)中的應用</h3> </a></li> <li><a href="/html/web/jiejuefangan2/1768562721493807105.html"> <div id="rwoh1ikca" class="imgfd"><img src="/upload/1/cms/content/1710492234468.png" alt=""></div> <h3>養殖場(chǎng)有哪些有毒有害氣體？</h3> </a></li> <li><a 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