Industrial kiln near-zero emission system and method

Abstract

The invention relates to an industrial kiln near-zero emission system and method, and belongs to the field of industrial heating. The system comprises a kiln body, an oxygen supply system, a heat exchanger, a smoke exhaust pipeline, a smoke exhaust fan, a circulating flue gas system, a combustor and a flue gas post-treatment system; the flue gas post-treatment system is used as a single module andcomprises a condensation type heat exchange device, a condensation water collecting system, a carbon dioxide capturing system and a waste heat utilization system; after comburent is combusted in thekiln body by utilizing a combustion-supporting system, the near-zero emission of flue gas is achieved through the flue gas post-treatment system. According to the industrial kiln near-zero emission system, the flue gas and oxygen are used for replacing combustion-supporting air in traditional combustion, the amount of three-atom gas in the flue gas is greatly increased, the heat transfer efficiency in a kiln can be effectively improved, generation of nitric oxides is reduced, and energy efficiency improvement and near-zero emission of the industrial furnace kiln can be achieved on the whole.

Description

technical field [0001] The invention belongs to the field of industrial heating, and relates to a near-zero emission system and method for industrial furnaces and kilns using natural gas and other high calorific value fuels as fuels. Background technique [0002] Energy is the material basis for the survival and development of human society. Every improvement and replacement of energy has greatly promoted the progress of human civilization. However, energy resources have also brought a series of environmental pollution while creating great wealth for human beings. At the same time, resources and energy also restrict the development and progress of society to a certain extent. Industrial furnace is a device that uses the energy released by fuel combustion to heat materials. It is widely used in the production links of roasting, drying, melting, smelting, heating and heat treatment of materials in the industrial field of our country. It consumes a lot of energy, such as rollin...

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Problems solved by technology

[0002] Energy is the material basis for the survival and development of human society. Every improvement and replacement of energy has greatly promoted the progress of human civilization. However, energy resources have also brought a series of environmental pollution while creating great wealth for human beings. At the same time, resources and energy also restrict the development and progress of society to a certain extent

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