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Show EXPERIMENTAL STUDY OF ULTRA-LOW EMISSION RADIANT POROUS BURNER by: Tian-yu Xiong Institute of Gas Technology Chicago, IL 60616 ABSTRACT The obj ective of this study was to prove the concept of the novel gas-fired burner with stable internal porous-phase combustion. This novel combustion concept has good potential in increasing firing intensi ty and radiant heat output, and reducing combustion emissions for space and process heater applications. A bench-scale porous burner has been built and tested. The unique performances of the test burner, such .as self-stabilization of combustion within the porous media in a large range of operating conditions, ultra-low NOx emissions from 1 to 12 vppm (at 0% 02), high radiant heat transfer rates up to 80 MBtu/h-ft2 (252 kW/m2) from the radiating surface, and high turndown ratio over 6:1 have been demonstrated. INTRODUCTION Heat transmission by radiation has been found to be superior to conventional heating methods for a variety of residential, commercial, and industrial applications. All of the currently available gas-fired infrared burners are based on the principle of utilizing flame energy or hot flue gases to heat some radiating refractory or material. Many significant advantages of radiant burners-heaters have been demonstrated as follows: 1. High heat transfer intensity can be achieved because of heat radiation from the high-temperature and high-emissivity surface . 2. Proper design of infrared equipment produces a uniform radiant flux intensity on the products . 3. Infrared energy is not normally affected by air current s . |
