Recuperator and radiant tube type heating apparatus

Abstract

Combustion exhaust gas generated during fuel combustion is guided to the outer peripheral side in an exhaust part of an exhaust port. A plurality of small pipes for guiding combustion air into the exhaust part are arranged. The front end part of each small pipe is connected with a large-diameter collecting cylinder part in the exhaust part; the combustion air guided into each small pipe is heatedby the heat of the combustion exhaust gas and guided into the collecting cylinder part. Furthermore, in a combustion air supply pipe wherein the combustion air heated in the collecting cylinder part is guided to the combustor, a combustion air guide pipe is slidably mounted, openings are provided in the collecting cylinder part and the combustion air guide pipe, and the area of the portion where the openings communicate with each other is adjusted so as to adjust the amount of combustion exhaust gas guided into the combustion air guide pipe.

Description

technical field [0001] The present invention relates to an energy recovery device and a radiant tube heating device using the energy recovery device. The energy recovery device guides the combustion air supplied to the burner into the exhaust part, and the combustion exhaust gas and the combustion air are contained in the exhaust part. Combustion air heats the combustion air supplied to the burner by exchanging heat with each other, and the exhaust unit guides combustion exhaust gas generated when fuel is burned by supplying combustion air to the burner to the exhaust port. In particular, it is characterized in that, in the above-mentioned energy recovery unit, the combustion air supplied to the burner is efficiently heated by the combustion exhaust gas after combustion, so that the heat of the combustion exhaust gas can be effectively used, and the above-mentioned heated When the combustion air is supplied to the burner and the fuel is combusted, harmful nitrogen oxides (here...

AI Technical Summary

Problems solved by technology

[0010] Therefore, in the apparatus disclosed in Patent Document 4, when the heated combustion air is supplied to the burner to burn fuel, the amount of combustion exhaust gas mixed with the heated combustion air cannot be automatically adjusted. In the case of supplying heated combustion air to the burner and burning fuel, it is not possible to properly prevent NO contained in the combustion exhaust gas with a simple structure. X increase in the amount

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