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      新聞詳情

        國內IG541氣體滅火系統的現狀

      • 來源: 時間:2019-7-10 17:50

      IG541滅火系統的由來

      IG541滅火系統源自于Inertgas og nitrogen = INERGEN(煙烙盡),按照其系統內潔凈氣體的比例而來(52%氮氣、40%氬氣、8%二氧化碳)。在國際上只有兩家品牌可稱為煙烙盡,因為他們注冊了該商標,最早注冊商標的是丹麥FIREEATER公司,成立于1974年,45年來只專注生產這一種設備,理論上而言,FIREEATER公司是煙烙盡的真實發明者。另一家則是大家都相對熟悉的美國ANSUL,出現最早的時候應該是1990年,當年的閥門命名為CV90閥,現在使用的CV98閥是98年研發的。

      因為有著商標的保護,現在大家看到的都是IG541,從功能性質上而言較煙烙盡是相同的,都屬于潔凈氣體滅火系統。

      IG541滅火系統之間的區別

      國內現行的IG541滅火系統一般都是15MPa,而國際上目前都常用30MPa和20MPa,究其本質區別在于技術力量的差距和對可持續發展概念的灌輸。國內的氣體設計規范要求上有一級充壓、二級充壓,也就意味著國內也在適用20MPa的系統。但國內自主研發20MPa系統的廠家非常少,20MPa的系統應用較為廣泛的還是國際上的一些知名品牌。

      《氣體滅火系統設計規范》GB50370-2005

      15MPa和20MPa的IG541滅火系統在鋼瓶使用量上有著大約25%的差距,相應占地面積也有很大的差距,所使用的各種部件數量上也存在差距(此處只相對于同等檔次品牌而言)。

      至于20MPa的應用,更多的使用者可能會覺得壓力太高,從心底里面產生一種抗拒,然而當系統設備的各種強度要求達到一定水平和技術要求后這種擔心是可以忽略的。按照設計規范上要求,20MPa二級充壓滅火系統的噴頭末端壓力≥2.1MPa,實際在經過減壓的時候,一級充壓和二級充壓基本相同。

      從使用性上講,20MPa傳輸的距離較15MPa而言要相對較遠,也可從某種意義上講可能會減少系統套數的使用,在數量上的差距可以減少施工量,減少施工過程中萬一發生不可控的幾率,為整個工程上減少造價和帶來一定的安全保障。

      IG541滅火系統的安全性

      IG541滅火系統屬于消防保護設備,它的使命就是要保障安全,那么系統的本身安全就尤為重要了。以下從幾個部件進行簡單描述。

      容器閥

      以上為國內現行中會經常看到的各種IG541的容器閥,從外觀而言談不上誰家的特別漂亮,但項目經歷多的會有自己的認識,這個認識可以從2個方面上來談:1、安全性;2、靈活性。

      我們都知道鋼瓶在搬運過程中存在非常大的安全隱患,這也是消防評定中心和國家固定滅火及耐火構建監督檢驗中心要求各個廠家都有鋼瓶傾倒試驗裝置來測試閥門的安全性。假如鋼瓶從高處(車上)從上跌落至地面,閥門先著地,那么以上幾種閥門哪種會更加安全?

      鋼瓶安裝完成到最后的調試交付過程中有眾多的操作步驟,很多都操作都在容器閥上進行,國內的容器閥一般都是帶壓,稍微操作不當,則會引起鋼瓶的泄放,造成的損失和安全又有什么合理的解決方式?以上的閥門那種會更加靈活呢?

      選擇閥

      選擇閥作為整套系統非常重要的一個部分,其是否正常開啟是確保滅火是否能夠進行的重要因素。目前國內看到的選擇閥多數為氣動,一般都是靠氮氣進行驅動,對于結構相對于簡單點的選擇閥啟動的可能性就大,而結構相對復雜的其啟動要求也相對復雜一些。根據GB25972文件的5.7.9條規定,選擇閥應具有手動操作功能,這一規定增加了對選擇閥功能性有著更高的要求。一般以為選擇閥的手動操作是指在斷電的時候進行手動操作啟動時所用,但幾乎所有廠家都沒有要求在日常生活中對選擇閥進行手動操作。正常工作中,選擇閥一般都不會開啟,長時間的不開啟可能會造成一定的卡死(所以選擇閥材質要求為不銹鋼或銅合金,不建議為鐵材質)。一旦選擇閥不能開啟,造成的后果就不可形容了。在全球只有丹麥FIREEATER的選擇閥具有日常維護開啟關閉功能,這不得不給我們泱泱大國的技術水平提出一個危險的信號,在國內將如何做到可以手動開啟和關閉選擇閥,是一個值得去學習的課題。能夠在日常維護中確保選擇閥是可以開啟的,這也為以后選擇閥正式啟動提供一個保障。

      壓力顯示器

      壓力顯示器俗稱為壓力表,也是我們判斷鋼瓶內部是否具有壓力的一個重要手段,在GB25972文件中要求在裝置明顯部位標出:生產單位或商標、產品規格型號、零位、貯存壓力、最大工作壓力,最小工作壓力等等,只有滿足上述基本要求才算基本符合國家要求。在GB25972的文件中14.2.6中還要求,安裝在滅火系統上的壓力顯示器應能在鋼瓶壓力泄露過程中發出報警信號,綜合所有種種才算是一個合格的壓力表。然而在國內生產的滅火系統的壓力表都不能做到實時測試鋼瓶內部壓力,都有專用的接頭接至鋼瓶上,通過旋轉才能測試鋼瓶內部壓力,技術水平尚缺,然后再需要壓力顯示器傳輸報警信號,這就讓國內生產廠家望塵莫及了。可能國內有部分廠家通過其他手段能夠監測壓力的變化,但沒能按照國家對壓力表的要求進行滿足。

      丹麥FIREEATER品牌的壓力表

      上圖中丹麥FIREEATER品牌的壓力表不但按國內要求滿足表盤基本要求,也是全天實時監測鋼瓶壓力,更重要的是它還能將鋼瓶壓力進行在線實時監測,可以將低壓泄露報警信號發出。

      一個小小的國家,堅持四十幾年的事業,將IG541滅火系統做到極致,這多么值得讓國內的眾多企業學習,也該讓國際上的一些知名品牌們好好借鑒。

      IG541于其他IG系列的比較

      現行還有其他幾種潔凈氣體比如:IG100、IG55、IG01等,這幾種潔凈氣體和IG541的比較在于哪些呢?

      從滅火介質而言都是大氣中的潔凈氣體,但噴放后的效果和預期就不同了。

      首先:IG541滅火系統是被權威機構認可的唯一可應用在有人值守場所的滅火系統,其被認可就取決于其藥劑中8%的二氧化碳,有興趣的可以去研究一下少量二氧化碳對人體呼吸的作用;

      其次:這幾種IG系列的滅火濃度也不同,滅火濃度相對而言還是IG541相對較低,其他的都相對較高,從成本造價上而言也就不值得推薦了;

      再者:空氣的分子質量大約為1.29KG/m,IG541的分子質量為1.34KG/m,純氮氣的分子質量為1.24KG/m(其他的暫不舉例)。

      從以上這三種數據可以看到,IG541噴放后藥劑會緩慢下沉,而IG100噴放后會漂浮在空氣之上,哪種滅火效果會更好也就不言而喻了。

      筆者非常吃驚的是國內很多廠家已有IG541滅火系統,在看到別的品牌在進行IG100銷售的時候也跟著去生產,這種盲目的跟風會有什么后果呢?

      好好的將國內現有IG541系統較國外先進技術進行對比,從中發現不足后改進才是中國消防企業目前迫在眉睫的事情,也要深究一個企業四十幾年堅持只做一件產品的背后,而不是而盲目跟風不符合實際需求的去做中國的消防產品。

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