Regenerative heating furnace low NOx combustion system and control method thereof

Abstract

The invention belongs to the fields of industrial furnace combustion and flue gas emission, and particularly relates to a regenerative heating furnace low NOx combustion system and a control method thereof. According to the low NOx combustion system, gas regenerative burners and air regenerative burners are matched in pairs and adopt a low-nitrogen combustion technology, and the gas regenerativeburners and the air regenerative burners combine a catalytic reaction with a heat storage process, so that functions of heat storage and low-temperature catalytic denitration are thus provided; meanwhile, the low NOx combustion system is matched with a low-temperature denitration system outside a furnace body, specifically, through the successively performed low-nitrogen combustion technology, regenerative burner catalytic denitration technology and low-temperature denitration technology outside a furnace, generation of nitrogen oxides in the combustion process can be effectively controlled, so that ultra-clean emission of the flue gas nitrogen oxides is realized, and finally, the concentration of the nitrogen oxides can be controlled to be 50 mg / Nm<3> or below or even 20 mg / Nm<3> or below; and ultralow emission of NOx of the regenerative heating furnace is realized, and requirements of the latest environmental protection index are met.

Description

technical field [0001] The invention belongs to the field of combustion and flue gas discharge of industrial furnaces, and in particular relates to a low NOx combustion system of a regenerative heating furnace and a control method thereof. Background technique [0002] The regenerative heating furnace is a device that uses the energy released by fuel combustion to heat materials. Relying on the unique regenerative heat exchange technology, the exhaust gas temperature can be reduced to 150°C, which greatly improves the thermal efficiency of the kiln. However, due to its unique The regenerative smoke exhaust method and the low exhaust temperature prevent the NOx in the flue gas from being treated by conventional methods. Contents of the invention [0003] In view of this, the object of the present invention is to provide a low NOx combustion system of a regenerative heating furnace and its control method, so as to realize the ultra-low emission of NOx of the regenerative hea...

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Problems solved by technology

[0002] The regenerative heating furnace is a device that uses the energy released by fuel combustion to heat materials. Relying on the unique regenerative heat exchange technology, the exhaust gas temperature can be reduced to 150°C, which greatly improves the thermal efficiency of the kiln. However, due to its unique The unique regenerative exhaust method and low exhaust temperature prevent the NOx in the flue gas from being treated by conventional methods

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