Introduction to SCR low-temperature flue gas denitrification, advantages, characteristics and principles of SCR flue gas denitrification

SCR low-temperature flue gas denitrificationit refers to the process of removing nitrogen oxides from flue gas to reduce environmental pollution. NOx is a pollutant harmful to the atmospheric environment, which has strong irritation and toxicity, and will lead to environmental problems such as acid rain and photochemical smog, and also endanger human health. The main principle of flue gas denitrification technology is to reduce NOx to nitrogen and water by adding appropriate reducing agent or catalyst in the combustion process or flue gas treatment system, so as to reduce NOx emission.，low in price。

1、Brief introduction of SCR low-temperature flue gas denitrification

SCR low-temperature flue gas denitrificationthat is, selective catalytic reduction technology is a technology used to reduce the emission of nitrogen oxides in flue gas.，in the course of work,Ammonia gas or other suitable reducing agent (such as urea aqueous solution) is sprayed into the flue gas upstream of the catalyst at high temperature. Under the action of catalyst, the reducing agent selectively reacts with nitrogen oxides (NOx) in flue gas to generate pollution-free nitrogen and water vapor. Because NH3 is selective, it only reacts with NOx and basically does not react with O2, so this technology is called selective catalytic reduction denitrification.，it has been widely used in coal-fired power station, Gas power plant, metallurgy, cement plant, iron and steel plant and other industries，Strong adaptability,High denitration efficiency,energy saving and environmental protection,Environment friendly,Less secondary pollution，is based on One-combustion energy saving is a kind of SCR low-temperature flue gas denitrification manufactured by One-combustion energy saving。

SCR low-temperature flue gas denitrification

2、SCR low-temperature flue gas denitrification HD real shot

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SCR low-temperature flue gas denitrification

Note: All the pictures in this article were taken by One-combustion energy saving manufacturer.。

3、Structural advantages of SCR low-temperature flue gas denitrification

The SCR low-temperature flue gas denitrification has the following structure

1. control system

The whole SCR low-temperature flue gas denitrification is automatically controlled, including the adjustment of reducing agent supply, flue gas flow and temperature, so as to ensure the stable operation of the system and achieve the expected denitrification effect.

2. Catalytic reduction reaction

Under the action of catalyst, the reductant and NOx in flue gas undergo selective catalytic reduction reaction to generate nitrogen and water vapor.

3. Flue gas mixing and distribution

The mixed reducing agent and flue gas are fully mixed in the mixing tube and evenly distributed to the catalyst reactor through the distribution system.

4. Reducing agent storage and supply system

Used to store and supply reducing agent (such as ammonia or urea solution) to the reactor.

5. Temperature control and monitoring

The temperature in the catalyst reactor is maintained within the optimal reaction temperature range through the temperature control and monitoring system.

SCR low-temperature flue gas denitrification

4、Functional advantages of SCR low-temperature flue gas denitrification

SCR low-temperature flue gas denitrifications have the following advantages.

1. Wide applicability

SCR low-temperature flue gas denitrification technology is suitable for many industries and processes, such as coal-fired power plants, iron and steel smelting, cement production and so on. These industries will produce a large number of NOx emissions in the production process, and the SCR low-temperature flue gas denitrification technology can provide effective denitrification solutions for them. In addition, the gate technology can be adjusted and optimized according to different flue gas components and emission requirements to meet different denitration requirements.

2. High efficiency denitration capacity

Gate is famous for its high efficiency of denitration, which can usually reach more than 90% denitration efficiency. This means that the SCR low-temperature flue gas denitrification technology can significantly reduce the concentration of nitrogen oxides (NOx) in flue gas and make it meet strict environmental protection emission standards. This high-efficiency denitration ability mainly benefits from the promotion of catalyst, which makes the chemical reaction between reductant and NOx more rapid and thorough.

3. Intelligent control and convenience of operation

The SCR low-temperature flue gas denitrification has gradually realized intelligent control. By integrating advanced control system and sensor technology, the SCR low-temperature flue gas denitrification can monitor the composition and emission concentration of flue gas in real time, and automatically adjust the injection amount of reductant and the active state of catalyst to ensure the stability and reliability of denitrification efficiency.

4. Environmental friendliness

The by-products produced by SCR low-temperature flue gas denitrification technology are mainly nitrogen and water vapor, which are harmless to the environment and will not cause secondary pollution. Compared with the traditional wet flue gas denitrification technology, the SCR low-temperature flue gas denitrification technology does not need to use a lot of water resources and will not produce pollutants such as wastewater, which is more in line with the requirements of environmental protection and sustainable development.

5. Diversity and high efficiency of catalysts

There are many kinds of catalysts used in the SCR low-temperature flue gas denitrification technology, including vanadium-based catalysts and titanium-based catalysts, which can promote the chemical reaction between reductant and NOx at low temperature. At the same time, the active components and carrier materials of the catalyst are constantly being developed and improved to improve its catalytic efficiency and service life. This enables the SCR low-temperature flue gas denitrification technology to maintain high efficiency of denitration in a wider temperature range and more complex flue gas conditions.

SCR low-temperature flue gas denitrification

5、SCR low-temperature flue gas denitrification application

SCR low-temperature flue gas denitrificationIt has the functions of Improve product quality, Meet the requirements of environmental protection, Promote sustainable development, Improve product quality and environmental protection，at the start of the operation,Catalysts are used to promote the selective catalytic reduction reaction between reducing agents (such as ammonia and urea) and NOx in flue gas. Under the action of catalyst, the reductant preferentially reacts with NOx to generate harmless nitrogen and water vapor, but hardly reacts with oxygen in flue gas. This chemical reaction is usually carried out in the temperature range of 200-450℃, and the specific reaction temperature depends on the type of catalyst selected.，the product looks beautiful.，generally, it is composed of Catalyst supply system, Temperature control and monitoring system, Flue gas mixing and distribution system, Catalyst reactor, control system and other major components，it has the characteristics of Mature technology, Good selectivity, Environmental protection and pollution-free, Stable operation and Promote sustainable development。

SCR low-temperature flue gas denitrification

SCR low-temperature flue gas denitrificationmultifunctional, with functions such as Promote sustainable development, Improve working conditions, Promote sustainable development, Improve energy efficiency and environmental protection，The structural design is simple, novel and special.，it mainly includes control system, Flue gas mixing and distribution system, Catalyst supply system, Catalyst reactor and Temperature control and monitoring system。