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    燃燒和爆炸止動裝置

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    產品名稱: 燃燒和爆炸止動裝置
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    簡單介紹

    燃燒和爆炸制動 易燃液體的性質不穩定。當他們消失,他們可能會產生可燃氣體/空氣混合物。這種危險的條件下,通常遇到的化工,石化,石油和地點儲存,轉讓和易燃液體收集是他們的日常業務的一部分制藥廠。

    燃燒和爆炸止動裝置的詳細介紹

    燃燒和爆炸制動
    易燃液體的性質不穩定。當他們消失,他們可能會產生可燃氣體/空氣混合物。這種危險的條件下,通常遇到的化工,石化,石油和地點儲存,轉讓和易燃液體收集是他們的日常業務的一部分制藥廠。


    火焰和爆炸避雷器避雷器是被動的,機械設備在儲罐噴嘴或可燃氣體管道系統安裝。避雷器的職能是:(1)允許在正常工作條件下的水汽通道,(2)停止和撲滅火焰前通過任何易燃蒸氣/空氣混合物在緊急情況下傳播。停止火焰保護儲罐,或從災難性的破壞,可能導致無法控制的點火系統中的管道位于設備。避雷器設計的多種可供選擇。一個適當的避雷器的選擇取決于如避雷器就點火源和蒸氣/空氣混合物的易燃性的位置等因素。
    本Protectoseal公司建議國家電氣規范(NEC)第500,各種化學品的排名可以使用,只要有可能,以確定使用哪些特定化學物質的火焰,或引爆避雷器適用性。
    一個常見的阻火器配置安裝在一個存儲罐底排氣管,被確定為“*終的行”阻火器。這避雷器許可證儲罐正常呼吸,同時防止閃爍過去到管道和水箱的蒸氣空間避雷器回一個潛水爆燃(即在開放的氛圍蒸氣云點火)閃回。
    END-OF-LINE flame arrester














    阻火器是直接安裝在時代的上游壓力/真空救濟通風口,或連接到管道的出風口開放短期運行。這些設備,被稱為“發泄網上/內聯”阻火器的設計與法蘭或螺紋安裝在兩個入口和出口連接。這是可能的可燃氣體/空氣混合物點燃短期內的密閉空間或出水管內泄身體。這種點火器被稱為密閉爆燃。火焰速度很慢,壓力管道內泄相對較低。通風口線/在線路阻火旨在停止這種火焰前鋒的類型。注意:這些避雷器有非常具體的,以在那里他們可以得到妥善位于系統內的限制。

    "VENT-LINE / IN-LINE flame arresters
















    環境污染的標準嚴格執法,已對易燃液體儲存罐的巨大影響。而不是驅逐蒸氣進入大氣,這種趨勢已經對連接或多個坦克歧管通過共同管道到一個中央處理單元。這些已關閉的管道系統,或蒸氣回收/收集系統,創造了獨特的易燃氣體的安全隱患。管道運行在這些汽體回收系統往往是更長,更復雜。點火的潛在來源,實際上可能是在蒸汽收集系統本身存在。一個管道系統內可以導致點火火焰前面,可以加速非常迅速,并產生極高的壓力。低速,低壓密閉爆燃可以很容易地進入一個高速,高壓密閉爆燃和過渡然后到爆炸,這是一個在火焰前在蒸氣/空氣混合物的聲音速度移動。“爆炸”避雷器是專門設計來阻止和撲滅爆炸,爆燃和潛水承壓爆燃。認為是對尾線和排氣線/直插式阻火器放置的位置就點火源的限制不適用于引爆避雷器。


    FLAME & DETONATION ARRESTERS

    Flammable liquids are volatile in nature. As they evaporate, they may produce ignitable vapor/air mixtures. Such hazardous conditions are commonly encountered in chemical, petrochemical, petroleum and pharmaceutical plants where the storage, transfer and collection of flammable liquids are part of their daily operations.

    Flame arresters and detonation arresters are passive, mechanical device installed on a storage tank nozzle or in a flammable vapor piping system. The arresters' functions are: (1) to allow the passage of vapor under normal operating conditions and (2) to stop and extinguish any flame front propagating through the flammable vapor/air mixture under emergency conditions. Stopping the flame protects the storage tank, or the equipment located in the piping system, from the catastrophic damage that may result from an uncontrolled ignition. A variety of arrester designs are available. The choice of a proper arrester depends on factors such as the location of the arrester with respect to the ignition source and the flammable properties of the vapor/air mixture.

    The Protectoseal Company recommends that the National Electric Code (NEC) Article 500, rankings of various chemicals be used, whenever possible, to determine the suitability of a flame or detonation arrester for use which a particular chemical.

    END-OF-LINE flame arresterOne common flame arrester configuration is mounted at the end of a storage tank vent pipe and is identified as an "END-OF-LINE" flame arrester. This arrester permits normal tank breathing, while preventing the flashback of an unconfined deflagration (the ignition of the vapor cloud in the open atmosphere) from flashing back past the arrester into the piping and the tank's vapor space.

    "VENT-LINE / IN-LINE flame arresters

    Flame arresters are at times mounted directly upstream of pressure / vacuum relief vents, or are connected to short runs of open vent outlet piping. These devices, known as "VENT-LINE / IN-LINE" flame arresters are designed with flanged or threaded mounting connections on both the inlet and outlet. It is possible for a flammable vapor / air mixture to ignite within the confined space of the short outlet pipe or within the vent body. Such an ignition is referred to as a confined deflagration. The flame speed is slow and pressures within the vent piping are relatively low. The Vent-Line / In-Line Flame Arrester is designed to stop this type of flame front. Note: these arresters have very specific limitations as to where they can be properly located within the system.

    DETONATION arrestersStrict enforcement of environmental pollution standards has had a dramatic impact on tank storage of flammable liquids. Rather than expelling vapors into the atmosphere, the trend has been toward the connecting or manifolding of multiple tanks through common piping to a central processing unit. These closed piping systems, or vapor recovery / collection systems, have created unique flammable vapor safety hazards. The piping runs in these vapor recovery systems tend to be longer and more complex. Potential sources of ignition may actually be present within the vapor collection system itself. An ignition within a piping system can result in a flame front that accelerates very rapidly and generates extremely high pressures. A low speed, low pressure confined deflagration can readily transition into a high speed, high pressure confined deflagration and then to a detonation, which is a flame front moving at the speed of sound in the vapor/air mixture. "DETONATION" arresters are specifically designed to stop and extinguish detonations, confined deflagrations and unconfined deflagrations. The limitations that are placed on the location of end-of-line and vent-line / in-line flame arresters with respect to the ignition source do not apply to detonation arresters.

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