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class="icon-font icon-chakan"></i><script src="http://www.jianjingled.com/source/include/browse.php?model=news&id=473"></script>次</div> </div> <div class="xypg-detail-con"><p></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; outline: 0px; max-width: 100%; clear: both; min-height: 1em; letter-spacing: 0.544px; orphans: 2; white-space: normal; background-color: rgb(255, 255, 255); font-size: medium; font-family: -apple-system-font, BlinkMacSystemFont, 'Helvetica Neue', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei UI', 'Microsoft YaHei', Arial, sans-serif; widows: 1; box-sizing: border-box !important; overflow-wrap: break-word !important;"><span style="margin: 0px; padding: 0px; outline: 0px; max-width: 100%; box-sizing: border-box !important; overflow-wrap: break-word !important; font-size: 15px;">燃燒技術是當下處理VOCs的主流技術，其中包含<strong style="margin: 0px; padding: 0px; outline: 0px; max-width: 100%; box-sizing: border-box !important; overflow-wrap: break-word !important;"><a href='http://www.jianjingled.com/product/745.html' target='_blank' class='key_tag'><font><strong>催化燃燒</strong></font></a>、熱力燃燒、蓄熱催化燃燒、蓄熱熱力燃燒、濃縮催化燃燒</strong>等。燃燒技術的基理是VOCs在高溫下發生氧化反應，氧化反應的本質就是燃燒反應，是一種放熱反應，VOCs在燃燒過程的放熱量與VOCs的種類和濃度有關。</span></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; outline: 0px; max-width: 100%; clear: both; min-height: 1em; letter-spacing: 0.544px; orphans: 2; white-space: normal; background-color: rgb(255, 255, 255); font-size: medium; font-family: -apple-system-font, BlinkMacSystemFont, 'Helvetica Neue', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei UI', 'Microsoft YaHei', Arial, sans-serif; widows: 1; box-sizing: border-box !important; overflow-wrap: break-word !important;"><br style="margin: 0px; padding: 0px; outline: 0px; max-width: 100%; box-sizing: border-box !important; overflow-wrap: break-word !important;"/></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; outline: 0px; max-width: 100%; clear: both; min-height: 1em; letter-spacing: 0.544px; orphans: 2; white-space: normal; background-color: rgb(255, 255, 255); font-size: medium; font-family: -apple-system-font, BlinkMacSystemFont, 'Helvetica Neue', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei UI', 'Microsoft YaHei', Arial, sans-serif; widows: 1; box-sizing: border-box !important; overflow-wrap: break-word !important;"><span style="margin: 0px; padding: 0px; outline: 0px; max-width: 100%; box-sizing: border-box !important; overflow-wrap: break-word !important; font-size: 15px;">因而，從安全方面考慮，VOCs燃燒的安全使用濃度顯得尤為重要。了解VOCs燃燒過程的溫升和可燃氣體爆炸下限，有利于提高RTO、RCO設備技術的安全性能。</span></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; outline: 0px; max-width: 100%; clear: both; min-height: 1em; font-family: -apple-system, BlinkMacSystemFont, 'Helvetica Neue', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei UI', 'Microsoft YaHei', Arial, sans-serif; letter-spacing: 0.544px; orphans: 2; white-space: normal; widows: 2; background-color: rgb(255, 255, 255); font-size: medium; box-sizing: border-box !important; overflow-wrap: break-word !important;"><br style="margin: 0px; padding: 0px; outline: 0px; max-width: 100%; box-sizing: border-box !important; overflow-wrap: break-word !important;"/></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; outline: 0px; max-width: 100%; clear: both; min-height: 1em; font-family: -apple-system, BlinkMacSystemFont, 'Helvetica Neue', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei UI', 'Microsoft YaHei', Arial, sans-serif; letter-spacing: 0.544px; orphans: 2; white-space: normal; widows: 2; background-color: rgb(255, 255, 255); font-size: medium; text-align: center; box-sizing: border-box !important; overflow-wrap: break-word !important;"><img data-ratio="0.6666666666666666" data-src="https://mmbiz.qpic.cn/mmbiz_jpg/QjRyDZibAJrgyIks7f5Q4OQ5ZVc5XclTSrIcDIamyrBNQRnOKunfXHgCqCzSyicqnkjhjjyAMUnljAfAa4lVL7NQ/640?wx_fmt=jpeg" data-type="jpeg" data-w="1080" data-width="100%" height="297" width="446" _width="536px" class="" src="/data/upload/202109/1631602728157276.jpg" wah-hotarea="click" crossorigin="anonymous" alt="微信圖片_0001.jpg" data-fail="0" style="margin: 0px; padding: 0px; outline: 0px; max-width: 100%; box-sizing: border-box !important; overflow-wrap: break-word !important; height: auto !important; font-variant-numeric: normal; font-variant-east-asian: normal; letter-spacing: 0.544px; line-height: 27.2px; widows: 1; visibility: visible !important; width: 536px !important;" title="1631602728157276.jpg"/></p><p><section style="margin: 0px; padding: 0px; outline: 0px; max-width: 100%; font-family: -apple-system, BlinkMacSystemFont, 'Helvetica Neue', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei UI', 'Microsoft YaHei', Arial, sans-serif; letter-spacing: 0.544px; orphans: 2; white-space: normal; widows: 2; background-color: rgb(255, 255, 255); font-size: medium; box-sizing: border-box !important; overflow-wrap: break-word !important;"><section style="margin: 0px; padding: 0px; outline: 0px; max-width: 100%; box-sizing: border-box !important; overflow-wrap: break-word !important;"><section style="margin: 0px; padding: 0px; outline: 0px; max-width: 100%; box-sizing: border-box !important; overflow-wrap: break-word !important;"><section data-brushtype="text" style="margin: 0px; padding: 0px; outline: 0px; max-width: 100%; box-sizing: border-box !important; overflow-wrap: break-word !important;"><br style="margin: 0px; padding: 0px; outline: 0px; max-width: 100%; box-sizing: border-box !important; overflow-wrap: break-word !important;"/></section><section data-brushtype="text" style="margin: 0px; padding: 0px; outline: 0px; max-width: 100%; box-sizing: border-box !important; overflow-wrap: break-word !important;"><strong style="margin: 0px; padding: 0px; outline: 0px; max-width: 100%; box-sizing: border-box !important; overflow-wrap: break-word !important;"><span style="margin: 0px; padding: 0px; outline: 0px; max-width: 100%; box-sizing: border-box !important; overflow-wrap: break-word !important; font-size: 15px; color: rgb(0, 122, 170);">1、VOCs的爆炸下限是什么？</span></strong></section></section><section style="margin: 0px; padding: 0px; outline: 0px; max-width: 100%; box-sizing: border-box !important; overflow-wrap: break-word !important;"><section style="margin: 0px; padding: 0px; outline: 0px; max-width: 100%; box-sizing: border-box !important; overflow-wrap: break-word !important;"><section style="margin: 0px; padding: 0px; outline: 0px; max-width: 100%; box-sizing: border-box !important; overflow-wrap: break-word !important;"><br style="margin: 0px; padding: 0px; outline: 0px; max-width: 100%; box-sizing: border-box !important; overflow-wrap: break-word !important;"/></section><section style="margin: 0px; padding: 0px; outline: 0px; max-width: 100%; box-sizing: border-box !important; overflow-wrap: break-word !important;"><section style="margin: 0px; padding: 0px; outline: 0px; max-width: 100%; box-sizing: border-box !important; overflow-wrap: break-word !important;"><section style="margin: 0px; padding: 0px; outline: 0px; max-width: 100%; box-sizing: border-box !important; overflow-wrap: break-word !important;"><span style="margin: 0px; padding: 0px; outline: 0px; max-width: 100%; box-sizing: border-box !important; overflow-wrap: break-word !important; font-size: 15px;">可燃氣體在空氣中遇明火火種爆炸的最小濃度，稱之為爆炸下限，亦稱燃燒下限，英文名稱</span><span style="margin: 0px; padding: 0px; outline: 0px; max-width: 100%; box-sizing: border-box !important; overflow-wrap: break-word !important; font-size: 15px;">Lower </span><span style="margin: 0px; padding: 0px; outline: 0px; max-width: 100%; box-sizing: border-box !important; overflow-wrap: break-word !important; font-size: 15px;">Explosion </span><span style="margin: 0px; padding: 0px; outline: 0px; max-width: 100%; box-sizing: border-box !important; overflow-wrap: break-word !important; font-size: 15px;">Limited，即%LEL。</span><span style="margin: 0px; padding: 0px; outline: 0px; max-width: 100%; box-sizing: border-box !important; overflow-wrap: break-word !important; font-size: 15px;">空氣中可燃氣體濃度達到其爆炸下限值時，這個場所可燃氣環境爆炸危險度就達到了百分之百，即100％LEL；</span><span style="margin: 0px; padding: 0px; outline: 0px; max-width: 100%; box-sizing: border-box !important; overflow-wrap: break-word !important; font-size: 15px;">如果可燃氣體含量只達到其爆炸下限的百分之十，那這個場所此時的可燃氣環境爆炸危險度為10％LEL。</span><br style="margin: 0px; padding: 0px; outline: 0px; max-width: 100%; box-sizing: border-box !important; overflow-wrap: break-word !important;"/></section></section><section style="margin: 0px; padding: 0px; outline: 0px; max-width: 100%; box-sizing: border-box !important; overflow-wrap: break-word !important;"><section data-autoskip="1" style="margin: 0px; padding: 0px; outline: 0px; max-width: 100%; box-sizing: border-box !important; overflow-wrap: break-word !important;"><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; outline: 0px; max-width: 100%; clear: both; min-height: 1em; box-sizing: border-box !important; overflow-wrap: break-word !important;"><br style="margin: 0px; padding: 0px; outline: 0px; max-width: 100%; box-sizing: border-box !important; overflow-wrap: break-word !important;"/></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; outline: 0px; max-width: 100%; clear: both; min-height: 1em; box-sizing: border-box !important; overflow-wrap: break-word !important;"><span style="margin: 0px; padding: 0px; outline: 0px; max-width: 100%; box-sizing: border-box !important; overflow-wrap: break-word !important; font-size: 15px;">下表是常見VOCs在標準狀態下爆炸下限值。為了確保VOCs處理設備的安全運行，VOCs廢氣的濃度必須控制在對應有機物爆炸極限的25%以下。</span></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; outline: 0px; max-width: 100%; clear: both; min-height: 1em; box-sizing: border-box !important; overflow-wrap: break-word !important;"><br style="margin: 0px; padding: 0px; outline: 0px; max-width: 100%; box-sizing: border-box !important; overflow-wrap: break-word !important;"/></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; outline: 0px; max-width: 100%; clear: both; min-height: 1em; text-align: center; box-sizing: border-box !important; overflow-wrap: break-word !important;"><img src="/data/upload/202109/1631602759165623.jpg" title="1631602759165623.jpg" alt="微信圖片0002.jpg"/></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; outline: 0px; max-width: 100%; clear: both; min-height: 1em; box-sizing: border-box !important; overflow-wrap: break-word !important;"><span style="margin: 0px; padding: 0px; outline: 0px; max-width: 100%; box-sizing: border-box !important; overflow-wrap: break-word !important; font-size: 15px;">為什么要控制在25%LEL以下呢？首先，可燃氣體的爆炸下限濃度與可燃氣體的初始溫度有關：以正己烷為例，下圖是溫度對于正己烷爆炸下限濃度的影響（姚潔等，工業安全與環保，2012，38（2）：48），可見當可燃氣體初始溫度提高，相應爆炸下限濃度下降。</span></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; outline: 0px; max-width: 100%; clear: both; min-height: 1em; box-sizing: border-box !important; overflow-wrap: break-word !important;"><br style="margin: 0px; padding: 0px; outline: 0px; max-width: 100%; box-sizing: border-box !important; overflow-wrap: break-word !important;"/></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; outline: 0px; max-width: 100%; clear: both; min-height: 1em; text-align: center; box-sizing: border-box !important; overflow-wrap: break-word !important;"><img data-ratio="0.8992248062015504" data-src="https://mmbiz.qpic.cn/mmbiz_jpg/QjRyDZibAJrgyIks7f5Q4OQ5ZVc5XclTSU7WE80a9K51ZZicTmlCXle2asGxJBT2mE2Js5htjRLFnhenOEOpibzqg/640?wx_fmt=jpeg" data-type="jpeg" data-w="387" height="224" width="249" _width="414px" class="" src="/data/upload/202109/1631602869430804.jpg" wah-hotarea="click" crossorigin="anonymous" alt="微信圖片_0003.jpg" data-fail="0" style="margin: 0px; padding: 0px; outline: 0px; max-width: 100%; box-sizing: border-box !important; overflow-wrap: break-word !important; height: auto !important; visibility: visible !important; width: 414px !important;" title="1631602869430804.jpg"/></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; outline: 0px; max-width: 100%; clear: both; min-height: 1em; box-sizing: border-box !important; overflow-wrap: break-word !important;"><br style="margin: 0px; padding: 0px; outline: 0px; max-width: 100%; box-sizing: border-box !important; overflow-wrap: break-word !important;"/></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; outline: 0px; max-width: 100%; clear: both; min-height: 1em; box-sizing: border-box !important; overflow-wrap: break-word !important;"><span style="margin: 0px; padding: 0px; outline: 0px; max-width: 100%; box-sizing: border-box !important; overflow-wrap: break-word !important; font-size: 15px;">當氣體溫度達到600K（327°C）時，爆炸下限濃度達到室溫的75%，所以提高溫度會導致爆炸下限濃度明顯下降。而且實際工況中大多數是混合VOCs，混合VOCs的爆炸下限濃度具有不確定性。所以，實際操作中要控制在LEL濃度的25%內。</span></p></section></section><section style="margin: 0px; padding: 0px; outline: 0px; max-width: 100%; box-sizing: border-box !important; overflow-wrap: break-word !important;"><section style="margin: 0px; padding: 0px; outline: 0px; max-width: 100%; box-sizing: border-box !important; overflow-wrap: break-word !important;"><br style="margin: 0px; padding: 0px; outline: 0px; max-width: 100%; box-sizing: border-box !important; overflow-wrap: break-word !important;"/></section></section></section></section></section></section></section><section style="margin: 0px; padding: 0px; outline: 0px; max-width: 100%; font-family: -apple-system, BlinkMacSystemFont, 'Helvetica Neue', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei UI', 'Microsoft YaHei', Arial, sans-serif; letter-spacing: 0.544px; orphans: 2; white-space: normal; widows: 2; background-color: rgb(255, 255, 255); font-size: medium; box-sizing: border-box !important; overflow-wrap: break-word !important;"><section style="margin: 0px; padding: 0px; outline: 0px; max-width: 100%; box-sizing: border-box !important; overflow-wrap: break-word !important;"><section style="margin: 0px; padding: 0px; outline: 0px; max-width: 100%; box-sizing: border-box !important; overflow-wrap: break-word !important;"><section data-brushtype="text" style="margin: 0px; padding: 0px; outline: 0px; max-width: 100%; box-sizing: border-box !important; overflow-wrap: break-word !important;"><strong style="margin: 0px; padding: 0px; outline: 0px; max-width: 100%; box-sizing: border-box !important; overflow-wrap: break-word !important;"><span style="margin: 0px; padding: 0px; outline: 0px; max-width: 100%; box-sizing: border-box !important; overflow-wrap: break-word !important; font-size: 15px; color: rgb(0, 122, 170);">2、VOCs燃燒過程中的絕熱溫升</span></strong></section></section><section style="margin: 0px; padding: 0px; outline: 0px; max-width: 100%; box-sizing: border-box !important; overflow-wrap: break-word !important;"><section style="margin: 0px; padding: 0px; outline: 0px; max-width: 100%; box-sizing: border-box !important; overflow-wrap: break-word !important;"><section style="margin: 0px; padding: 0px; outline: 0px; max-width: 100%; box-sizing: border-box !important; overflow-wrap: break-word !important;"><br style="margin: 0px; padding: 0px; outline: 0px; max-width: 100%; box-sizing: border-box !important; overflow-wrap: break-word !important;"/></section><section style="margin: 0px; padding: 0px; outline: 0px; max-width: 100%; box-sizing: border-box !important; overflow-wrap: break-word !important;"><section style="margin: 0px; padding: 0px; outline: 0px; max-width: 100%; box-sizing: border-box !important; overflow-wrap: break-word !important;"><section data-autoskip="1" style="margin: 0px; padding: 0px; outline: 0px; max-width: 100%; box-sizing: border-box !important; overflow-wrap: break-word !important;"><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; outline: 0px; max-width: 100%; clear: both; min-height: 1em; box-sizing: border-box !important; overflow-wrap: break-word !important;"><span style="margin: 0px; padding: 0px; outline: 0px; max-width: 100%; box-sizing: border-box !important; overflow-wrap: break-word !important; font-size: 15px;">什么是絕熱溫升？絕熱溫升指放熱反應物完全轉化時所放出的熱量可以使物料升高的溫度。其表達式為：</span></p><p style="text-align:center"><img src="/data/upload/202109/1631602904421090.jpg" title="1631602904421090.jpg" alt="微信圖片_0004.jpg" width="634" height="182" style="width: 634px; height: 182px;"/></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; outline: 0px; max-width: 100%; clear: both; min-height: 1em; box-sizing: border-box !important; overflow-wrap: break-word !important;"><br style="margin: 0px; padding: 0px; outline: 0px; max-width: 100%; box-sizing: border-box !important; overflow-wrap: break-word !important;"/></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; outline: 0px; max-width: 100%; clear: both; min-height: 1em; box-sizing: border-box !important; overflow-wrap: break-word !important;"><span style="margin: 0px; padding: 0px; outline: 0px; max-width: 100%; box-sizing: border-box !important; overflow-wrap: break-word !important; font-size: 15px;">式中分子為反應熱（J/mol）與物料摩爾濃度(mol/L)的乘積；分母為物料平均密度(kg/L)與物料平均比熱容(J/kg*K)的乘積。</span></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; outline: 0px; max-width: 100%; clear: both; min-height: 1em; box-sizing: border-box !important; overflow-wrap: break-word !important;"><br style="margin: 0px; padding: 0px; outline: 0px; max-width: 100%; box-sizing: border-box !important; overflow-wrap: break-word !important;"/></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; outline: 0px; max-width: 100%; clear: both; min-height: 1em; box-sizing: border-box !important; overflow-wrap: break-word !important;"><span style="margin: 0px; padding: 0px; outline: 0px; max-width: 100%; box-sizing: border-box !important; overflow-wrap: break-word !important; font-size: 15px;">VOCs的燃燒過程是強放熱反應，因放熱使得氣體溫度的升高。下表是幾種常見VOCs濃度1000mg/m3時完全燃燒的絕熱溫升。</span></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; outline: 0px; max-width: 100%; clear: both; min-height: 1em; box-sizing: border-box !important; overflow-wrap: break-word !important;"><br style="margin: 0px; padding: 0px; outline: 0px; max-width: 100%; box-sizing: border-box !important; overflow-wrap: break-word !important;"/></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; outline: 0px; max-width: 100%; clear: both; min-height: 1em; text-align: center; box-sizing: border-box !important; overflow-wrap: break-word !important;"><img data-ratio="0.9617977528089887" data-src="https://mmbiz.qpic.cn/mmbiz_jpg/QjRyDZibAJrgyIks7f5Q4OQ5ZVc5XclTSiaZC6dDtFFWtysBYAjqMd6ibdOFYbUuef8zt0pEB4VBZBuZUpoJScGTw/640?wx_fmt=jpeg" data-type="jpeg" data-w="445" height="294" width="305" _width="414px" class="" src="/data/upload/202109/1631602962462902.jpg" wah-hotarea="click" crossorigin="anonymous" alt="微信圖片_005jpg.jpg" data-fail="0" style="margin: 0px; padding: 0px; outline: 0px; max-width: 100%; box-sizing: border-box !important; overflow-wrap: break-word !important; height: auto !important; visibility: visible !important; width: 414px !important;" title="1631602962462902.jpg"/></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; outline: 0px; max-width: 100%; clear: both; min-height: 1em; box-sizing: border-box !important; overflow-wrap: break-word !important;"><br style="margin: 0px; padding: 0px; outline: 0px; max-width: 100%; box-sizing: border-box !important; overflow-wrap: break-word !important;"/></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; outline: 0px; max-width: 100%; clear: both; min-height: 1em; box-sizing: border-box !important; overflow-wrap: break-word !important;"><span style="margin: 0px; padding: 0px; outline: 0px; max-width: 100%; box-sizing: border-box !important; overflow-wrap: break-word !important; font-size: 15px;">如果采用<a href='http://www.jianjingled.com/news/419.html' target='_blank' class='key_tag'><font><strong>催化燃燒技術</strong></font></a>處理VOCs，在設備和催化正常的情況下，催化反應前后氣體溫度的變化（溫升）則反映了VOCs的濃度變化。如1000mg/m3甲苯完全燃燒的絕熱溫升為31.95°C，如在實際使用過程中，溫升達到320°C，那就說明甲苯濃度大約達到了10000mg/m3，此時已經非常接近甲苯的25%LEL值，已經是非常不安全了，必須及時降低甲苯濃度。</span></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; outline: 0px; max-width: 100%; clear: both; min-height: 1em; box-sizing: border-box !important; overflow-wrap: break-word !important;"><br style="margin: 0px; padding: 0px; outline: 0px; max-width: 100%; box-sizing: border-box !important; overflow-wrap: break-word !important;"/></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; outline: 0px; max-width: 100%; clear: both; min-height: 1em; box-sizing: border-box !important; overflow-wrap: break-word !important;"><span style="margin: 0px; padding: 0px; outline: 0px; max-width: 100%; box-sizing: border-box !important; overflow-wrap: break-word !important; font-size: 15px;">在活性炭濃縮-催化燃燒系統中，在活性炭脫附過程，可以通過VOCs<a href='http://www.jianjingled.com/news/421.html' target='_blank' class='key_tag'><font><strong>催化劑</strong></font></a>床層的溫升，來檢測VOCs濃度的變化，很多可燃氣體濃度報警器就是利用這一原理。</span></p></section></section><section style="margin: 0px; padding: 0px; outline: 0px; max-width: 100%; box-sizing: border-box !important; overflow-wrap: break-word !important;"><section style="margin: 0px; padding: 0px; outline: 0px; max-width: 100%; box-sizing: border-box !important; overflow-wrap: break-word !important;"><br style="margin: 0px; padding: 0px; outline: 0px; max-width: 100%; box-sizing: border-box !important; overflow-wrap: break-word !important;"/></section></section></section></section></section></section></section><section style="margin: 0px; padding: 0px; outline: 0px; max-width: 100%; font-family: -apple-system, BlinkMacSystemFont, 'Helvetica Neue', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei UI', 'Microsoft YaHei', Arial, sans-serif; letter-spacing: 0.544px; orphans: 2; white-space: normal; widows: 2; background-color: rgb(255, 255, 255); font-size: medium; box-sizing: border-box !important; overflow-wrap: break-word !important;"><section style="margin: 0px; padding: 0px; outline: 0px; max-width: 100%; box-sizing: border-box !important; overflow-wrap: break-word !important;"><section style="margin: 0px; padding: 0px; outline: 0px; max-width: 100%; box-sizing: border-box !important; overflow-wrap: break-word !important;"><section data-brushtype="text" hm_fix="302:340" style="margin: 0px; padding: 0px; outline: 0px; max-width: 100%; box-sizing: border-box !important; overflow-wrap: break-word !important;"><strong style="margin: 0px; padding: 0px; outline: 0px; max-width: 100%; box-sizing: border-box !important; overflow-wrap: break-word !important;"><span style="margin: 0px; padding: 0px; outline: 0px; max-width: 100%; box-sizing: border-box !important; overflow-wrap: break-word !important; font-size: 15px; color: rgb(0, 122, 170);">3、VOCs設備的防爆注意點</span></strong></section></section><section style="margin: 0px; padding: 0px; outline: 0px; max-width: 100%; box-sizing: border-box !important; overflow-wrap: break-word !important;"><section style="margin: 0px; padding: 0px; outline: 0px; max-width: 100%; box-sizing: border-box !important; overflow-wrap: break-word !important;"><section style="margin: 0px; padding: 0px; outline: 0px; max-width: 100%; box-sizing: border-box !important; overflow-wrap: break-word !important;"><br style="margin: 0px; padding: 0px; outline: 0px; max-width: 100%; box-sizing: border-box !important; overflow-wrap: break-word !important;"/></section><section style="margin: 0px; padding: 0px; outline: 0px; max-width: 100%; box-sizing: border-box !important; overflow-wrap: break-word !important;"><section style="margin: 0px; padding: 0px; outline: 0px; max-width: 100%; box-sizing: border-box !important; overflow-wrap: break-word !important;"><section data-autoskip="1" style="margin: 0px; padding: 0px; outline: 0px; max-width: 100%; box-sizing: border-box !important; overflow-wrap: break-word !important;"><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; outline: 0px; max-width: 100%; clear: both; min-height: 1em; box-sizing: border-box !important; overflow-wrap: break-word !important;"><span style="margin: 0px; padding: 0px; outline: 0px; max-width: 100%; box-sizing: border-box !important; overflow-wrap: break-word !important; font-size: 15px;">1、處理裝置設計和采用的電器元件必須按照規范要求符合防爆等級</span></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; outline: 0px; max-width: 100%; clear: both; min-height: 1em; box-sizing: border-box !important; overflow-wrap: break-word !important;"><span style="margin: 0px; padding: 0px; outline: 0px; max-width: 100%; box-sizing: border-box !important; overflow-wrap: break-word !important; font-size: 15px;">2、設備布置要滿足安全距離的要求</span></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; outline: 0px; max-width: 100%; clear: both; min-height: 1em; box-sizing: border-box !important; overflow-wrap: break-word !important;"><span style="margin: 0px; padding: 0px; outline: 0px; max-width: 100%; box-sizing: border-box !important; overflow-wrap: break-word !important; font-size: 15px;">3、與氣體接觸的自動控制閥必須使用氣動閥</span></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; outline: 0px; max-width: 100%; clear: both; min-height: 1em; box-sizing: border-box !important; overflow-wrap: break-word !important;"><span style="margin: 0px; padding: 0px; outline: 0px; max-width: 100%; box-sizing: border-box !important; overflow-wrap: break-word !important; font-size: 15px;">4、必須選用防爆風機</span></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; outline: 0px; max-width: 100%; clear: both; min-height: 1em; box-sizing: border-box !important; overflow-wrap: break-word !important;"><span style="margin: 0px; padding: 0px; outline: 0px; max-width: 100%; box-sizing: border-box !important; overflow-wrap: break-word !important; font-size: 15px;">5、在所有處理系統中必須在適當位置安裝符合國家標準的阻火器</span></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; outline: 0px; max-width: 100%; clear: both; min-height: 1em; box-sizing: border-box !important; overflow-wrap: break-word !important;"><span style="margin: 0px; padding: 0px; outline: 0px; max-width: 100%; box-sizing: border-box !important; overflow-wrap: break-word !important; font-size: 15px;">6、在處理裝置中的敏感部位（超溫、超壓等）要按照規范設置報警裝置及應急處理措施</span></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; outline: 0px; max-width: 100%; clear: both; min-height: 1em; box-sizing: border-box !important; overflow-wrap: break-word !important;"><span style="margin: 0px; padding: 0px; outline: 0px; max-width: 100%; box-sizing: border-box !important; overflow-wrap: break-word !important; font-size: 15px;">7、為確保運行安全，必要時可采用連鎖設計</span></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; outline: 0px; max-width: 100%; clear: both; min-height: 1em; box-sizing: border-box !important; overflow-wrap: break-word !important;"><span style="margin: 0px; padding: 0px; outline: 0px; max-width: 100%; box-sizing: border-box !important; overflow-wrap: break-word !important; font-size: 15px;">8、要考慮現場整體的安全、環境應急預案</span></p></section></section><section style="margin: 0px; padding: 0px; outline: 0px; max-width: 100%; box-sizing: border-box !important; overflow-wrap: break-word !important;"><section style="margin: 0px; padding: 0px; outline: 0px; max-width: 100%; box-sizing: border-box !important; overflow-wrap: break-word !important;"><br style="margin: 0px; padding: 0px; outline: 0px; max-width: 100%; box-sizing: border-box !important; overflow-wrap: break-word !important;"/></section></section></section></section></section></section></section><section style="margin: 0px; padding: 0px; outline: 0px; max-width: 100%; font-family: -apple-system, BlinkMacSystemFont, 'Helvetica Neue', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei UI', 'Microsoft YaHei', Arial, sans-serif; letter-spacing: 0.544px; orphans: 2; white-space: normal; widows: 2; background-color: rgb(255, 255, 255); font-size: medium; box-sizing: border-box !important; overflow-wrap: break-word !important;"><section style="margin: 0px; padding: 0px; outline: 0px; max-width: 100%; box-sizing: border-box !important; overflow-wrap: break-word !important;"><section style="margin: 0px; padding: 0px; outline: 0px; max-width: 100%; box-sizing: border-box !important; overflow-wrap: break-word !important;"><section data-brushtype="text" style="margin: 0px; padding: 0px; outline: 0px; max-width: 100%; box-sizing: border-box !important; overflow-wrap: break-word !important;"><strong style="margin: 0px; padding: 0px; outline: 0px; max-width: 100%; box-sizing: border-box !important; overflow-wrap: break-word !important;"><span style="margin: 0px; padding: 0px; outline: 0px; max-width: 100%; box-sizing: border-box !important; overflow-wrap: break-word !important; font-size: 15px; color: rgb(0, 122, 170);">4、VOCs的爆炸下限基本概念及求解案例</span></strong></section></section><section style="margin: 0px; padding: 0px; outline: 0px; max-width: 100%; box-sizing: border-box !important; overflow-wrap: break-word !important;"><section style="margin: 0px; padding: 0px; outline: 0px; max-width: 100%; box-sizing: border-box !important; overflow-wrap: break-word !important;"><section style="margin: 0px; padding: 0px; outline: 0px; max-width: 100%; box-sizing: border-box !important; overflow-wrap: break-word !important;"><br style="margin: 0px; padding: 0px; outline: 0px; max-width: 100%; box-sizing: border-box !important; overflow-wrap: break-word !important;"/></section><section style="margin: 0px; padding: 0px; outline: 0px; max-width: 100%; box-sizing: border-box !important; overflow-wrap: break-word !important;"><section style="margin: 0px; padding: 0px; outline: 0px; max-width: 100%; box-sizing: border-box !important; overflow-wrap: break-word !important;"><section data-autoskip="1" style="margin: 0px; padding: 0px; outline: 0px; max-width: 100%; box-sizing: border-box !important; overflow-wrap: break-word !important;"><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; outline: 0px; max-width: 100%; clear: both; min-height: 1em; box-sizing: border-box !important; overflow-wrap: break-word !important;"><span style="margin: 0px; padding: 0px; outline: 0px; max-width: 100%; box-sizing: border-box !important; overflow-wrap: break-word !important; font-size: 15px;"><a href='http://www.jianjingled.com/news/424.html' target='_blank' class='key_tag'><font><strong>有機廢氣</strong></font></a>大多為易燃易爆物質，被處理的VOCs混合氣的爆炸性問題更是方案設計不可或缺的部分。</span></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; outline: 0px; max-width: 100%; clear: both; min-height: 1em; box-sizing: border-box !important; overflow-wrap: break-word !important;"><br style="margin: 0px; padding: 0px; outline: 0px; max-width: 100%; box-sizing: border-box !important; overflow-wrap: break-word !important;"/></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; outline: 0px; max-width: 100%; clear: both; min-height: 1em; text-align: center; box-sizing: border-box !important; overflow-wrap: break-word !important;"><img data-croporisrc="https://mmbiz.qpic.cn/mmbiz_png/QUYX59X4tJorhvuFImaRkkla0hG8Qia5LLOpRs1kJH3vk037CKxyUWAoWb5icLQLIsE8GQAzeBGbvou9JUj3iawYg/640?wx_fmt=jpeg" data-cropx1="0" data-cropx2="262" data-cropy1="0" data-cropy2="293.0096618357488" data-ratio="1.118320610687023" data-src="https://mmbiz.qpic.cn/mmbiz_jpg/wYibVkaHcwaWgDAeZwPDbbLdCUC9oMNaRZYU2Z4jzORKI9QTcDmaicshGjrdTdK4TAnr4qtnnykONMLbMs6yPWUQ/640?wx_fmt=jpeg" data-type="jpeg" data-w="262" _width="414px" class="" src="/data/upload/202109/1631603087200266.jpg" wah-hotarea="click" crossorigin="anonymous" alt="微信圖片_0010.jpg" data-fail="0" style="margin: 0px; padding: 0px; outline: 0px; max-width: 100%; box-sizing: border-box !important; overflow-wrap: break-word !important; height: auto !important; visibility: visible !important; width: 414px !important;" title="1631603087200266.jpg"/></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; outline: 0px; max-width: 100%; clear: both; min-height: 1em; box-sizing: border-box !important; overflow-wrap: break-word !important;"><br style="margin: 0px; padding: 0px; outline: 0px; max-width: 100%; box-sizing: border-box !important; overflow-wrap: break-word !important;"/></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; outline: 0px; max-width: 100%; clear: both; min-height: 1em; box-sizing: border-box !important; overflow-wrap: break-word !important;"><span style="margin: 0px; padding: 0px; outline: 0px; max-width: 100%; box-sizing: border-box !important; overflow-wrap: break-word !important; font-size: 15px;">首先，分享幾個基本概念。①閃點是指可燃氣體揮發出的蒸氣和空氣的混合物與火源接觸能夠閃燃的最小溫度。閃點越低，引發火災事故的危險性越大。如常見的VOCs類汽油、苯、酒精等閃點在28℃以下，容易引發火災事故。②爆炸極限也稱爆炸濃度極限，是指可燃物質（可燃氣體、蒸氣和粉塵）與空氣（或氧氣）必須在一定的濃度范圍內均勻混合，形成預混氣，遇著火源才會發生爆炸，這個濃度范圍。</span></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; outline: 0px; max-width: 100%; clear: both; min-height: 1em; box-sizing: border-box !important; overflow-wrap: break-word !important;"><br style="margin: 0px; padding: 0px; outline: 0px; max-width: 100%; box-sizing: border-box !important; overflow-wrap: break-word !important;"/></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; outline: 0px; max-width: 100%; clear: both; min-height: 1em; text-align: center; box-sizing: border-box !important; overflow-wrap: break-word !important;"><img data-ratio="0.6141025641025641" data-src="https://mmbiz.qpic.cn/mmbiz_jpg/QUYX59X4tJorhvuFImaRkkla0hG8Qia5LM40U7ynwibvNnbKKFBYLicNAo3yHYj72daapdibnOoRxaib9wWtNKN92Og/640?wx_fmt=jpeg" data-type="jpeg" data-w="780" _width="414px" class="" src="/data/upload/202109/1631603898921866.jpg" wah-hotarea="click" crossorigin="anonymous" alt="微信圖片_009.jpg" data-fail="0" style="margin: 0px; padding: 0px; outline: 0px; max-width: 100%; box-sizing: border-box !important; overflow-wrap: break-word !important; height: auto !important; visibility: visible !important; width: 414px !important;" title="1631603898921866.jpg"/></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; outline: 0px; max-width: 100%; clear: both; min-height: 1em; box-sizing: border-box !important; overflow-wrap: break-word !important;"><br style="margin: 0px; padding: 0px; outline: 0px; max-width: 100%; box-sizing: border-box !important; overflow-wrap: break-word !important;"/></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; outline: 0px; max-width: 100%; clear: both; min-height: 1em; box-sizing: border-box !important; overflow-wrap: break-word !important;"><span style="margin: 0px; padding: 0px; outline: 0px; max-width: 100%; box-sizing: border-box !important; overflow-wrap: break-word !important; font-size: 15px;">例如常見的VOC：苯，其與空氣混合的爆炸極限為1.5%～9.5%，前后兩個數字分別稱為爆炸下限和爆炸上限，這兩者有時亦稱為著火下限和著火上限。在低于爆炸下限時不爆炸也不著火；在高于爆炸上限時不會爆炸，但能燃燒。這是由于前者的可燃物濃度不夠，過量空氣的冷卻作用，阻止了火焰的蔓延；而后者則是空氣不足，導致火焰不能蔓延的緣故。常見物質的爆炸極限如下，僅供參考：</span></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; outline: 0px; max-width: 100%; clear: both; min-height: 1em; box-sizing: border-box !important; overflow-wrap: break-word !important;"><br style="margin: 0px; padding: 0px; outline: 0px; max-width: 100%; box-sizing: border-box !important; overflow-wrap: break-word !important;"/></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; outline: 0px; max-width: 100%; clear: both; min-height: 1em; text-align: center; box-sizing: border-box !important; overflow-wrap: break-word !important;"><img data-ratio="1.1283783783783783" data-src="https://mmbiz.qpic.cn/mmbiz_png/QUYX59X4tJorhvuFImaRkkla0hG8Qia5LPBzCqknI7EHIRxUuu3W1YY0E68wZZMCAN4MeVPKwtLib54z4kGyufmw/640?wx_fmt=png" data-type="png" data-w="444" _width="414px" class="" src="/data/upload/202109/1631603925509083.jpg" wah-hotarea="click" crossorigin="anonymous" alt="微信圖片_111.jpg" data-fail="0" style="margin: 0px; padding: 0px; outline: 0px; max-width: 100%; box-sizing: border-box !important; overflow-wrap: break-word !important; height: auto !important; visibility: visible !important; width: 414px !important;" title="1631603925509083.jpg"/></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; outline: 0px; max-width: 100%; clear: both; min-height: 1em; box-sizing: border-box !important; overflow-wrap: break-word !important;"><br style="margin: 0px; padding: 0px; outline: 0px; max-width: 100%; box-sizing: border-box !important; overflow-wrap: break-word !important;"/></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; outline: 0px; max-width: 100%; clear: both; min-height: 1em; text-align: center; box-sizing: border-box !important; overflow-wrap: break-word !important;"><img data-ratio="0.8457943925233645" data-src="https://mmbiz.qpic.cn/mmbiz_jpg/QUYX59X4tJorhvuFImaRkkla0hG8Qia5Lwu9HYJmgL6ic1T1T3WdP7bHTq3FRxbjlMRT8J1RaGI7nSsd9ia0Z2www/640?wx_fmt=jpeg" data-type="jpeg" data-w="214" _width="414px" class="" src="/data/upload/202109/1631603951276280.jpg" wah-hotarea="click" crossorigin="anonymous" alt="微信圖片_112.jpg" data-fail="0" style="margin: 0px; padding: 0px; outline: 0px; max-width: 100%; box-sizing: border-box !important; overflow-wrap: break-word !important; height: auto !important; visibility: visible !important; width: 414px !important;" title="1631603951276280.jpg"/></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; outline: 0px; max-width: 100%; clear: both; min-height: 1em; box-sizing: border-box !important; overflow-wrap: break-word !important;"><span style="margin: 0px; padding: 0px; outline: 0px; max-width: 100%; box-sizing: border-box !important; overflow-wrap: break-word !important; font-size: 15px;">附：混合氣體的爆炸極限計算（僅供參考）<br style="margin: 0px; padding: 0px; outline: 0px; max-width: 100%; box-sizing: border-box !important; overflow-wrap: break-word !important;"/></span></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; outline: 0px; max-width: 100%; clear: both; min-height: 1em; box-sizing: border-box !important; overflow-wrap: break-word !important;"><span style="margin: 0px; padding: 0px; outline: 0px; max-width: 100%; box-sizing: border-box !important; overflow-wrap: break-word !important; font-size: 15px;">公式為：Lm=1/（Y1/L1+Y2/L2+Y3/L3），式中：</span></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; outline: 0px; max-width: 100%; clear: both; min-height: 1em; box-sizing: border-box !important; overflow-wrap: break-word !important;"><span style="margin: 0px; padding: 0px; outline: 0px; max-width: 100%; box-sizing: border-box !important; overflow-wrap: break-word !important; font-size: 15px;">Lm——混合VOCs爆炸極限（%）；</span></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; outline: 0px; max-width: 100%; clear: both; min-height: 1em; box-sizing: border-box !important; overflow-wrap: break-word !important;"><span style="margin: 0px; padding: 0px; outline: 0px; max-width: 100%; box-sizing: border-box !important; overflow-wrap: break-word !important; font-size: 15px;">Y1、Y2、Y3——混合物中組成（%）；</span></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; outline: 0px; max-width: 100%; clear: both; min-height: 1em; box-sizing: border-box !important; overflow-wrap: break-word !important;"><span style="margin: 0px; padding: 0px; outline: 0px; max-width: 100%; box-sizing: border-box !important; overflow-wrap: break-word !important; font-size: 15px;">L1、L2、L3——混合氣體各組份相應的爆炸極限（%）。</span></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; outline: 0px; max-width: 100%; clear: both; min-height: 1em; box-sizing: border-box !important; overflow-wrap: break-word !important;"><span style="margin: 0px; padding: 0px; outline: 0px; max-width: 100%; box-sizing: border-box !important; overflow-wrap: break-word !important; font-size: 15px;">例如：一天然氣組成如下：甲烷80%（L下=5.0%）、乙烷15%（L下=3.22%）、丙烷4%（L下=2.37%）、丁烷1%（L下=1.86%）</span></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; outline: 0px; max-width: 100%; clear: both; min-height: 1em; box-sizing: border-box !important; overflow-wrap: break-word !important;"><span style="margin: 0px; padding: 0px; outline: 0px; max-width: 100%; box-sizing: border-box !important; overflow-wrap: break-word !important; font-size: 15px;">求該天然氣的爆炸下限。解：Lm=1/（80/5+15/3.22+4/2.37+1/1.86）= 4.369%</span></p></section></section></section></section></section></section></section></p><p><br/></p></div> <div class="xypg-detail-tags"> <div class="tags-title"> <h3>標簽</h3> <div class="baidu-share">  <div class="bshare-custom"> <a title="分享到QQ空間" 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