工業燃燒爐中的積污成因很多，不完全燃燒的碳顆粒、未完全燃燒的油滴均會造成積污的生成。本研究以積污模擬器進行工業燃燒爐燃燒室的積污模擬，針對不同燃燒條件，探討主燃燒區不同空氣量、不同位置及不同燃料油對於積污生成量的影響。實驗過程中採用分段空氣燃燒法，減少主燃燒區的空氣供給量，使主燃燒區燃燒狀況較差，減少之空氣轉而由燃燒爐中段注入，燃燒未完全的氣體將在燃燒爐中段進行第二次燃燒，不致影響氣體排放濃度。本研究採用分段空氣燃燒法之目的，在於加速積污之生成。
　　結果顯示，分段空氣分率愈高，則主燃燒區燃燒愈不完全，所生成之積污量愈多，積污層愈黏厚；分段空氣分率較低時，所生成的積污量較少，且較為乾燥。積污模擬器位置對於積污生成亦有相當的影響。當積污模擬器較靠近火焰側時，所生成的積污量較多，積污的型態也較為黏稠。積污之化學組成亦隨分段空氣分率及積污模擬器位置而改變，分段空氣分率愈高且愈靠近火焰側，其積污的碳、氫、氮含量愈高。積污粉末中，以碳的成分最高，約佔80~90%，氫約佔2~3%，氮約佔1%。針對不同燃料油進行積污模擬時，採用具有抗積污效果之磁性油基流體 (NanoFe)燃料油，確可得到積污減量之效。
　　本實驗重現性良好，實驗誤差在7%以內。證明此系統確可快速而有效達成積污模擬分析。

　　Various cases of deposits formation in a furnace was analyzed and compared experimentally by means of water-cooled deposits collector, which collected soot, smoke, and unburned oil drops in the combustion gases. Over-fired air (OFA) scheme of burning was employed, in which the air supply to the main section was reduced to worsen its combustion efficiency and thus facilitate deposits formation. A certain amount of secondary air was then injected to the middle section, where incompletely burned gases could be further oxidized. In this study, the effects of secondary/primary air ratio, deposits collection position, and fuel type on the properties of the sdeposits was discussed.
　　The results showed that the thickness abs stickiness of the deposits grew and as secondary/primary air ratio was increased or as the deposit collection position was closer to the flame; in the mean time, the carbon, hydrogen, and nitrogen concentrations in the deposits would be higher. In general, the deposits contained 80~90% carbon, 2~3% hydrogen, and 1%nitrogen in mass. From fuel type testing, it was seen that fuel oils containing NanoFe had indeed reduced the amount of deposits.
　　With less than 7% error and good repeatability, the water-cooled deposits collector was found to be a fast and reliable deposits simulator.

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