Writer： admin Time：2021-11-19 00:00 Browse：℃
Among everyday use, and maintenance of the gas burner is certainly indispensable, industrial burners, there are many applications, to learn more about the principle of the transformation of low nitrogen gas boiler
Low nitrogen gas boiler transformation principles
Gas-fired boilers for low-nitrogen want reform, we tend to be more easily achieved through low NOx combustion technology, usually we will change the original gas burner to low nitrogen burners to achieve. Today we take a closer look at the transformation of the principle of low nitrogen gas boiler gas boiler low nitrogen transformation principle: the transformation of low nitrogen gas boiler is to reduce emissions of nitrogen, then follow the main measures to control NOX emissions according to different aspects of control can be divided into categories: the first is to control the generation of NOX, by lowering the temperature of the high temperature combustion zone, reduce the temperature distribution of the region, in the manner currently used more gas boiler industry, efficient and simple control of nitrogen oxides mainly controlling combustion law. Mainly through optimization of the furnace combustion conditions, optimize the mixing of fuel and air, control the distribution of the flame, the furnace temperature reducing nitrogen oxides to be reduced. There are several common methods: 1, staged combustion air required for the combustion air staged combustion with the fuel mixture, and reducing the combustion flame temperature strength. The secondary air outlet for high speed, roll seats around the flue, so that flue gas recirculation in the furnace. Classifying air distribution while reducing the temperature at the center of the flame, on the other hand dilutes the oxygen concentration of the flame surface, thereby suppressing generation of NOX. 2, flue gas recirculation techniques (of FGR) technology refers to flue gas recirculation is part of the flue gas after combustion (mainly water vapor, carbon dioxide and nitrogen) is returned to the burner drawn, mixed with fresh air is involved in combustion. Recirculated flue gas temperature and the flame temperature in the furnace is much lower than is possible to significantly reduce the temperature in the furnace, to reduce the furnace volume heat intensity. Meanwhile, since the introduction of the low flue gas oxygen content in the furnace can effectively reduce the oxygen concentration in the furnace, effective to inhibit the formation of NOx. 3, the water-cooled burner flame combustion technology is surrounded by cooling water, to remove heat by cooling water pipe, reduce the flame temperature, thereby destroying the nitrogen oxide formation conditions. Is generally used together with premixed combustion technology, premixed combustion can effectively reduce the flame length, the shorter the flame can be sufficiently cool the cooling pipe, the concentration can effectively reduce NOx emissions. 4, the metal mesh surface premix combustion is premix combustion refers to combustion of the fuel prior to combustion air and the desired exact ratio of all premixed combustion in the whole process can be performed in real-time air-fuel ratio constant. Made of iron - chromium - porous metal fiber mesh material made of aluminum and rare combustion surface that uniform pore distribution, high intensity combustion, the exact gas and air mixture to produce clusters of the short type flame on its surface, a large burning area, homogeneous combustion, no local high temperature, inhibit the formation of NOx. That is more than the entire contents of the principle of the transformation of low nitrogen gas boiler, and for environmental protection projects, so we have to reduce nitrogen emissions, it needs to be low-nitrogen burners transformation.
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