石油化工企業(yè)火災(zāi)具有突然性、多變性、快速性、撲救難度較大等特點(diǎn),要根據(jù)不同情況,采取相應(yīng)的對(duì)策。
1)、撲救石油化工企業(yè)火災(zāi)的主要任務(wù)
(1)、排除爆炸危險(xiǎn)。
(2)、搶救人命。
(3)、防止中毒。
2)、慎重使用滅火劑和中和劑
(1)、石油化工企業(yè)火災(zāi)燃燒的物品大多是化學(xué)危險(xiǎn)物品,要根據(jù)不同的燃燒對(duì)象、燃燒狀態(tài)采用相應(yīng)的滅火劑。如果滅火劑使用不當(dāng),不僅不能將火撲滅,反而會(huì)使火勢(shì)增大,甚至引起爆炸。
(2)、對(duì)石油化工企業(yè)火災(zāi)現(xiàn)場(chǎng)產(chǎn)生的各種有毒氣體,除應(yīng)采取通風(fēng)驅(qū)散措施外,還可將中和劑滲入水中,利用噴霧水槍邊滅火、邊中和有毒氣體。
3)、撲救石油化工企業(yè)火災(zāi)的戰(zhàn)術(shù)措施
(1)、抓住時(shí)機(jī),以快制勝。
(2)、抓住火災(zāi)初期階段或火勢(shì)較弱的時(shí)機(jī),利用環(huán)境條件,以最快的戰(zhàn)斗行動(dòng),控制和消滅火災(zāi)。
(3)、以冷制熱,防止爆炸。
(4)、滅火的同時(shí),對(duì)著火的設(shè)備及四周鄰近設(shè)備進(jìn)行冷卻降溫,不能顧此失彼,防止爆炸。
(5)、先重點(diǎn),后一般。
(6)、先撲滅外圍火,然后內(nèi)攻,以控制火勢(shì)向周圍蔓延擴(kuò)大,防止形成大面積火災(zāi)。戰(zhàn)斗力量不足時(shí),應(yīng)先重點(diǎn)后一般,先易后難,控制火勢(shì)。
(7)、各個(gè)擊破,適時(shí)合圍。
(8)、對(duì)于較大面積的火災(zāi),應(yīng)采取各個(gè)擊破、穿插分割、堵截火勢(shì)、適時(shí)圍殲的方法。
4)、采取工藝滅火措施
工藝滅火措施主要有如下幾種:
(1)、關(guān)閥斷料就是控制、斷絕流向火源處的可燃物質(zhì),使燃燒中止。
(2)、開(kāi)閥導(dǎo)流,是將著火儲(chǔ)罐、設(shè)備的可燃物料導(dǎo)出,以縮短燃燒時(shí)間或使燃燒中止的工藝滅火措施。對(duì)有壓力的設(shè)備導(dǎo)流滅火時(shí),要防止造成負(fù)壓,產(chǎn)生回火爆炸。導(dǎo)流時(shí)應(yīng)注意觀察設(shè)備的壓力,當(dāng)壓力接近表壓時(shí),應(yīng)立即關(guān)閉導(dǎo)流閥門,停止導(dǎo)流。
(3)、攪拌滅火適用于撲救儲(chǔ)罐、容器、反應(yīng)器內(nèi)高閃點(diǎn)的液體火災(zāi)。
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