3BHB005243R0106模塊卡件,3BHB005243R0106參數(shù)說(shuō)明
如果呼吸閥放散和氮封閥出現(xiàn)故障或者泄壓速度慢，罐體壓力依然上升，達(dá)到罐體設(shè)定的最高值時(shí)，觸發(fā)聯(lián)鎖使通往濃氨水儲(chǔ)槽管道上的氮?dú)怆姶砰y會(huì)自動(dòng)關(guān)閉，切斷氮?dú)獾倪M(jìn)入由氮封閥和呼吸閥進(jìn)行泄壓。當(dāng)緊急情況發(fā)生的時(shí)候也可以通過(guò)人工泄壓。3BHB005243R0106模塊卡件此外，還放置了壓力極高聯(lián)鎖系統(tǒng)，如果罐體壓力到達(dá)極高聯(lián)鎖設(shè)定值的時(shí)候，通過(guò)聯(lián)鎖使進(jìn)料閥自動(dòng)緊急切斷，從而保障罐內(nèi)壓力平穩(wěn)、罐體不被破壞。
為滿足SIS系統(tǒng)功能的實(shí)現(xiàn)，對(duì)現(xiàn)場(chǎng)儀表的挑選應(yīng)盡量選擇自身具有危險(xiǎn)診斷功能和故障率較低的儀表測(cè)量設(shè)備。對(duì)于液氨球罐和濃氨水儲(chǔ)罐的安全儀表系統(tǒng)安裝，針對(duì)其液位測(cè)量和壓力測(cè)量應(yīng)選擇冗余配置，實(shí)現(xiàn)多選一功能。
針對(duì)緊急切斷功能，切斷閥應(yīng)盡量選擇電磁閥，并盡量使用常開(kāi)點(diǎn)，電磁切斷閥采用串聯(lián)冗余配置，并與過(guò)程控制系統(tǒng)分離控制，在出現(xiàn)故障時(shí)提高其可靠性。另外，SIS系統(tǒng)的運(yùn)行過(guò)程中，軟件一直在運(yùn)行，并對(duì)程序控制測(cè)點(diǎn)進(jìn)行不斷的數(shù)據(jù)交換，準(zhǔn)確的對(duì)聯(lián)鎖數(shù)據(jù)進(jìn)行檢測(cè)和干預(yù)，保證SIS系統(tǒng)在安全生產(chǎn)中穩(wěn)定運(yùn)行的時(shí)效性，安全性。隨著技術(shù)水平的不斷提升，電力生產(chǎn)對(duì)DCS 系統(tǒng)的要求也在不斷提高，DCS 系統(tǒng)的穩(wěn)定性、可靠性決定了電力生產(chǎn)效率，相關(guān)從業(yè)者必須對(duì)DCS 系統(tǒng)常見(jiàn)故障、故障成因、維護(hù)方法、處理方法有足夠的認(rèn)識(shí)，同時(shí)要保證相關(guān)制度的落實(shí)，減少人為因素的影響，將DCS 系統(tǒng)故障率降至最低。本文僅對(duì)DCS 日常維護(hù)與故障分析排查進(jìn)行了簡(jiǎn)要闡述，更為深入的問(wèn)題還需廣大技術(shù)工作者進(jìn)一步分析。
DCS 電源系統(tǒng)多為“雙備份熱冗余電源”，電源故障的防控，主要體現(xiàn)在巡檢、日常維護(hù)方面，維護(hù)人員需根據(jù)實(shí)際情況，做好各個(gè)控制柜的運(yùn)作情況記錄。3BHB005243R0106模塊卡件,3BHB005243R0106參數(shù)說(shuō)明
通常來(lái)說(shuō)，只要機(jī)組正常運(yùn)行，DCS 系統(tǒng)故障率較低，而出現(xiàn)的故障也多為“單路失電”，只要盡快排除故障，即可讓DCS 系統(tǒng)恢復(fù)運(yùn)行。
? 故障分析：
電源是維系DCS 系統(tǒng)正常運(yùn)作的重要部分，出現(xiàn)問(wèn)題需盡快找到問(wèn)題成因，故障的成因主要有以下幾方面：consumption, which does not play any role in the power supply process of IT equipment. For the whole industry, it is not only a huge economic burden, but also a serious public environmental problem. Against the backdrop of increasing global energy tension and rising energy costs, Build a "green, low-carbon and intelligent" "The control system has become the main theme. System requirements: how to effectively use energy-saving, green, low-carbon and environmental protection technologies to improve management level, reduce costs and improve benefits, and integrate it and related equipment into a system management platform, which puts forward higher requirements for IDC room information management and operation and maintenance. Therefore, it is necessary to establish itemized metering of power supply and distribution, ups and air conditioning according to relevant national standards and specific needs The machine room system of environmental protection equipment
