DS200SLCCG1AFG燃機(jī)模塊,GE產(chǎn)品外觀DS200SLCCG1AFG
Phoenix火焰掃描儀通過(guò)監(jiān)測(cè)火焰的振幅來(lái)確定是否存在火焰
火焰的閃爍頻譜很寬。最初應(yīng)安裝掃描儀，以便主燃燒區(qū)位于掃描儀的視線范圍內(nèi)。
以下各節(jié)中列出的位置和瞄準(zhǔn)說(shuō)明是位置的大致指南掃描儀的。掃描儀通過(guò)LED和4-20ma輸出提供反饋，以協(xié)助調(diào)整
以及火焰掃描儀的正確對(duì)準(zhǔn)。請(qǐng)參閱本維修通訊中描述的設(shè)置程序。
DS200SLCCG1AFG燃機(jī)模塊注：可接受的掃描儀位置必須確保以下各項(xiàng)：在所有氣流和爐膛負(fù)荷（范圍）下可靠的主火焰和/或點(diǎn)火器火焰檢測(cè)燃料燃燒）。
如果太短或位置錯(cuò)誤，無(wú)法點(diǎn)燃主火焰，則拒絕點(diǎn)火器火焰可靠，從而禁止向燃燒器輸送燃料。
注：確保在調(diào)試前選擇正確的FFRT（火焰失效響應(yīng)時(shí)間）1。當(dāng)掃描器瞄準(zhǔn)時(shí)，掃描器的視線以微小角度（例如5度）與燃燒器中心相交，并能看到最大的一次燃燒區(qū)，如圖3所示。如果每個(gè)燃燒器僅使用一臺(tái)掃描儀，則視線還應(yīng)與點(diǎn)火火焰相交。
對(duì)于使用單獨(dú)掃描儀監(jiān)測(cè)主火焰和點(diǎn)火器火焰的裝置，主火焰應(yīng)看到火焰掃描儀，使其無(wú)法檢測(cè)到點(diǎn)火器火焰。
3、掃描儀應(yīng)盡可能不受限制地查看火焰。物理障礙物如空氣調(diào)節(jié)器葉片、干擾葉片或其他硬件應(yīng)切掉或開(kāi)槽，以便它們不在掃描儀的視線范圍內(nèi)
The Phoenix flame scanners determine the presence or absence of flame by monitoring the amplitude of
the flame across a wide flicker frequency spectrum. The scanner should initially be mounted so that the
primary combustion zone is within the scanner’s line of sight.
The location and sighting instructions listed in the following sections are rough guidelines for the location
of the scanner. The scanner provides feedback via LEDs and the 4-20ma output to assist in the adjustment
and proper alignment of the flame scanner. Refer to the set-up procedures described in this bulletin.
Note: An acceptable scanner location must ensure the following:
Reliable main flame and/or igniter flame detection at all air flow and furnace loads (ranges
of fuel firing).
Rejection of the igniter flame if too short or in the wrong position to ignite the main flame
reliably, thus prohibiting the delivery of fuel to the burner.
Note: Ensure the correct FFRT (Flame Failure Response TIme) is selected prior to commissioning1. The best results are obtained when the scanner is aimed so that the scanner’s line of sight intersects the burner center at a slight angle (e.g. 5 degrees) and sees a maximum of the primary
combustion zone, as shown in Figure 3. If only one scanner is used per burner, the line of sight
should also intersect the igniting flame.
2. For installations where separate scanners are used to monitor main and igniter flames, the main
flame scanner should be sighted so it does not detect the igniter flame.
3. The scanner should have an unrestricted view of flame as far as possible. Physical obstructions
such as air register blades, interfering vanes, or other hardware should be cut away or notched so
they do not fall within the scanner’s line of sight
