With the increasing standard of living of the people, the national requirements for environmental protection emissions are becoming stricter and stricter, industry has brought rapid economic development, but in the development to also pay attention to flue gas emissions to meet the standards of environmental protection requirements. Low carbon economy has become the trend of development in the new era, and denitrification catalyst has become one of the important components to meet the emission standards.

At present, the function of natural gas boilers, mainly for heating, steam production and power generation as a supplement, natural gas is recognized as clean energy, the early that boilers do not need environmental protection tail gas treatment facilities, but at this stage there are policy requirements for denitrification, the general requirement for emission standards below 50 mg/Nm3, special area emission standards below 30 mg/Nm3, Jiangsu Province had developed emissions below 10 mg/Nm3 for the solicitation of standards At present, the main technology is low-NOx combustion technology, that is, the combustion nozzle is changed into a low-NOx burner, which basically meets the emission standard of 30 mg/Nm3 of NOx in the exhaust gas. Low-NOx combustion technology to control the combustion temperature and oxygen content to achieve the purpose of inhibiting the production of NOx and control the value of NOx in the flue gas, in this case, will reduce the thermal efficiency of the system by about 5 ~ 10%, increasing the operating costs of the system. Take a 50t boiler as an example, after the low nitrogen combustion system, the boiler will consume nearly 3 million yuan more natural gas per year to produce the same steam, which is uneconomical, and also contrary to the current double carbon policy ("carbon peak, carbon neutral").

Reaction principle: Selective catalytic reduction (SCR) method, in which ammonia is used as a reducing agent in a reactor equipped with a catalyst to remove nitrogen oxides. The NOx in the flue gas generally consists of about 95% NO and 5% NO2 by volume. The denitrification reaction is converted to nitrogen and water vapor in the molecular state according to the following basic reactions The denitrification reactor (i.e. denitrification catalyst layer) is set between the boiler economizer and the air preheater. The inlet of the denitrification reactor is connected to the boiler economizer outlet via a flue, and the outlet is connected to the air preheater via a flue. The flue gas passes vertically through the denitration catalyst layer of the denitration reactor from top to bottom, at which time the flue gas temperature is about 280~420℃, which is the best reaction temperature for the denitration catalytic reduction reaction.

Anhui Yuanchen Environmental Technology Co., Ltd ("Yuanchen Technology") is a high-tech enterprise integrating R&D, production and sales of dust bag and denitrification catalyst. The dust bags (mainly PPS, PTFE, P84 and composite series filter materials) and SCR denitrification catalysts have been widely used in cement, steel, glass kilns, waste incineration power generation, biomass power generation, non-ferrous metal smelting and other industries. In the future, Yuanchen Technology will be guided by "becoming the guardian of global ecological environment", always rooted in environmental protection, and insist on the great cause of guarding the blue sky and white clouds. Leveraging on the national ecological civilization construction pattern, we will continue to deepen technology, optimize management, strengthen brand, refine industry, solidify advantages, and create synergistic value for industry through comprehensive and integrated governance and services.

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