Paper on Exergy Saving Type High Temperature Air Combustion
Hiroshi TANIGUCHI, Mitsunobu MORITA, Norio ARAI, Masakazu OBATA
An exergy saving type combustion technique has been developed by introducing high temperature air burner which has a regenerative heat recovery with honeycomb type ceramics and frequent switching device to keep a level of 1000 deg. C and over. However, NOx emission will be increased by this high temperature air combustion and has to be decreased by some technique which is held by low oxygen combustion method. The low oxygen combustion can be obtained by well mixing of fresh air and combustion gas. In this paper, we can realize that the exergy value is decreased by combustion process and increased by heat recovery process. Therefore, the exergy saving process in combustion may be achieved by heat recovery from exhaust gas to fresh air. Recently, we have many application of exergy saving type high temperature air combustion for some industrial furnaces. When we introduce the above high temperature air combustion, it may be possible to reduce about 30% ener-gy for comparing with existing type of furnace. Furthermore, it is clear that the steam boiler or chemical reactor furnace may be constructed by radiation part only. So, we have many advantages of energy and resource saving results which are derived from high temperature air combustion.
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