Low nitrogen oxide incinerating device used for treatment of nitrogen containing waste gas and nitrogen containing waste liquid and low nitrogen oxide incinerating method used for treatment of nitrogen containing waste gas and nitrogen containing waste liquid

Abstract

The invention provides a low nitrogen oxide incinerating device used for a treatment of nitrogen containing waste gas and nitrogen containing waste liquid and a low nitrogen oxide incinerating method used for the treatment of the nitrogen containing waste gas and the nitrogen containing waste liquid. The device comprises an oxygen debt reducing section, a primary quenching section, an oxidizing section, a secondary quenching section, SNCR denitrating section and a waste heat boiler. The method comprises the following steps: (1) oxygen debt incinerating; (2) primary quenching; (3) oxygen excess incinerating; (4) secondary quenching; (5) SNCR denitrating; (6) waste heat recovery. According to the device and the method, the technology of combining the staged combustion of the air over a furnace, the flue gas recycling and the SNCR denitrating is utilized, and a whole set of incinerating device, incinerating method and controlling philosophy are provided, so that the generating of the nitrogen oxide during the combustion of the waste such as nitrogen containing waste gas, nitrogen containing waste liquid and like can be effectively controlled, particularly the generating of the fuel type nitrogen oxide can be inhibited significantly and the transformation rate that the nitrogen generates the nitrogen oxide in the fuel composition can be lowered.

Description

technical field [0001] The invention belongs to the technical field of chemical waste incineration, and relates to an incineration device for reducing the generation of nitrogen oxides for treating nitrogen-containing waste gas and waste liquid, and in particular to an incineration method thereof. The incineration method involved in the invention is suitable for the treatment of nitrogen-containing waste gas and waste liquid in various industrial fields such as petrochemical industry, fine chemical industry, coal chemical industry, and coking. Background technique [0002] Environmental protection and energy saving and emission reduction are eternal subjects of industrial combustion devices. Especially with the latest environmental protection standards, such as "GB 31570-2015 Pollutant Discharge Standard for Petroleum Refining Industry", "GB31571-2015 Pollutant Discharge Standard for Petrochemical Industry", "GB 16171-2012 Pollutant Discharge Standard for Coking Chemical Ind...

AI Technical Summary

Problems solved by technology

For the treatment of such nitrogen-containing waste gas and waste liquid, the traditional incineration method cannot reduce the generation of fuel-type nitrogen oxides, and the research and development of special treatment devices for nitrogen-containing waste gas and waste liquid in my country is not yet perfect, which is very important for reducing fuel-type nitrogen oxides. There is still a lack of effective methods for the formation of nitrogen oxides, so new incineration concepts and devices need to be developed

[0003] In terms of mechanism, the generation of nitrogen oxides in industrial combustion devices is mainly divided into two categories. One is the thermal type, which is greatly affected by temperature. Exponential growth, and the formation of nitrogen oxides is proportional to the power of one-half of the oxygen concentration in the combustion atmosphere; the other type is the fuel type, that is, the nitrogen element in the fuel exists in the state of a compound, and during the combustion process, nitrogen The nitrogen element in the compound is released as a free radical, and combines with oxygen to form nitrogen oxides. The formation of fuel-type nitrogen oxides is difficult to control

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