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激光氧分析儀在煤粉倉的安全守護作用

球團礦生產(chǎn)過程中,環(huán)冷機排放的高溫廢氣蘊含大量余熱資源。通過利用這些廢氣干燥煤粉或驅動蒸汽輪機,鋼鐵企業(yè)可實現(xiàn)顯著的能耗降低與資源循環(huán)利用。

然而,當煤粉進入儲倉,一個看不見的危險悄然形成:氧氣與煤粉的混合物在特定濃度下,只需一絲火花即可引發(fā)毀滅性爆炸。

傳統(tǒng)的氧氣監(jiān)測手段因響應滯后、易受干擾或維護頻繁,難以滿足煤粉倉安全防護的嚴苛需求。在這一背景下,基于TDLAS(可調諧半導體激光吸收光譜)技術的激光氧分析儀正成為保障安全生產(chǎn)的關鍵技術屏障。


環(huán)冷余熱制煤工藝與煤粉倉爆炸風險

球團車間環(huán)冷環(huán)節(jié)產(chǎn)生的廢氣溫度常高達300℃以上,將其用于煤粉干燥或能源回收,是鋼鐵行業(yè)降本增效的成熟路徑。然而,此工藝需將制備后的煤粉存儲于大型倉罐內,正是這一環(huán)節(jié)隱藏著重大安全風險。

煤粉具有很高的火災爆炸敏感性。當倉內氧氣濃度達到一定閾值(通常為12%-16%),且煤粉顆粒懸浮形成粉塵云時,遇到靜電火花、機械摩擦發(fā)熱或外部明火,即可能引發(fā)爆炸。

實際工況中,導致煤粉倉氧氣濃度異常升高的因素復雜多樣:系統(tǒng)密封失效引入空氣、惰性氣體覆蓋不充分、煤粉輸送過程夾帶氧氣,甚至設備檢修后的殘留空氣等。

激光氧分析儀在煤粉倉的應用

TDLAS技術原理與激光氧分析儀的性能優(yōu)勢

激光氧分析儀的核心技術——TDLAS,半導體激光器發(fā)射特定波長的激光束穿透被測氣體,探測器通過分析激光強度的衰減程度,實時計算出氧氣濃度。

該技術具備三大革命性突破:

抗干擾能力:氧氣吸收譜線經(jīng)過精密篩選,其他氣體組分在此波段無重疊吸收,消除背景氣體干擾;

長光程高靈敏度:采用多次反射懷特池技術,將有效光程延伸至10米以上,滿足工藝安全監(jiān)測需求;

惡劣工況適應性:非接觸式測量方式避免粉塵吸附和腐蝕,適應溫度范圍擴展至-30℃~60℃,防護等級達IP65,防爆等級滿足ExdⅡCT6標準。


在煤粉倉氧氣監(jiān)測中的核心應用價值

在球團車間環(huán)冷余熱制煤工藝中,激光氧分析儀被直接安裝在煤粉倉的關鍵點位,實時監(jiān)測氧氣濃度動態(tài),其創(chuàng)造的價值遠超單純的儀表功能:


防爆從被動響應轉向主動預防

當檢測到氧濃度超過安全閾值(如8%),系統(tǒng)自動觸發(fā)三級聯(lián)鎖控制:初級報警時鎖定出料口防止空氣滲入;二級報警啟動充氮系統(tǒng)稀釋氧氣;緊急狀態(tài)下執(zhí)行全倉氣體置換,確保氧含量降至5%以下,將事故遏制在萌芽階段。


保障工藝穩(wěn)定性與資源高效利用

實時氧濃度數(shù)據(jù)為優(yōu)化氮氣注入策略提供依據(jù)。通過設定動態(tài)調節(jié)閥,僅在需要時注入惰性氣體,避免過度消耗。鋼廠實測數(shù)據(jù)顯示,此方法使氮氣用量減少20%-30%,年節(jié)約成本超百萬元。


設備可靠性提升運維變革

某鋼鐵企業(yè)對比數(shù)據(jù)顯示,采用激光分析儀后,煤粉倉相關儀表的年維護時間從120小時降至不足15小時,維護成本下降80%。


多年過去,激光氧分析儀已從實驗室走向工業(yè)現(xiàn)場。球團車間煤粉倉旁,這些設備靜默運行,激光束穿透飛揚的煤粉,實時捕捉每一個氧氣分子。它們帶來的不僅是危險預警,更是操作人員走進車間時的安心。



本文關鍵詞:激光氧分析儀,氧含量分析儀,氣體分析儀,煤粉倉測氧

本文作者:宜昌盛達科技有限公司,轉載請注明出處!

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宜昌盛達科技有限公司

宜昌盛達科技有限公司成立于2015年,是一家專注氣體安全監(jiān)測與分析的技術型企業(yè),長期為不同行業(yè)的氣體分析應用客戶提供可靠的分析儀產(chǎn)品和解決方案。

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