Advantages of using ultra-low temperature DNT SCR catalyst in waste energy

Patented technologies, such as manganese based SCR ultra-low temperature nitrification catalysts, non vanadium titanium series with independent intellectual property rights, new radial and moving layer SCR nitrification reactors, This technology has an ultra-low activation temperature (125-180 ° C, after using a bag filter, the catalyst usage conditions are optimized, greatly reducing the operating cost generated when heating the flue gas). High removal efficiency (meeting ultra-low emission requirements, even after canceling SNCR, it can still meet ultra-low emission requirements, further reducing the composite energy consumption of removal), Harmless catalyst waste (all catalyst raw materials do not use hazardous substances listed in the national environmental registration), and waste catalysts have the advantage of resource recovery.
1、 Industrial Examples of Ultra Low Temperature Denitrification Catalysts
2.1 Supply of Three Ultra Low Temperature Units at Changsha Huanghua Airport
In September 2019, an SCR ultra-low temperature denitrification project was implemented at the tail end of the three major supply units at Huanghua Airport, with a temperature range of 130-145 ℃, an average import NOx concentration of 900mg/Nm3, and an average export concentration of 30mg/Nm3. Currently, it operates every winter and summer.
2.2 Company Tunnel Kiln System Ultra Low Temperature Nitrification Project<& Lt; Inner Mongolia Zhongke Synthetic Petroleum Co., Ltd Gt& Gt;
In July 2021, the ultra-low temperature denitrification project of flue gas at the Zhongke Synthetic Oil Tunnel Kiln roasting site was put into operation and officially put into operation. The flue gas design value is 40000 caliber, with a desulfurization temperature of 125-135 ° C. The average inlet NOx concentration is 3500-4000 mg/Nm3, and the average outlet value is below 20mg/Nm3. It has been running continuously for 21 months.
2.3 Jinan Jinlai Wind Power Co., Ltd
On January 10, 2023, the ultra-low temperature flue gas desulfurization wind furnace of Jinlai Wind Furnace in Jinan City was put into operation and officially put into operation. The desulfurization temperature is 130 ℃, and the NOx concentration at the outlet of the heating furnace is 300-1200 mg/Nm3. After ultra-low temperature desulfurization, the NOx concentration at the outlet decreases to 10-50 mg/Nm3, and the desulfurization efficiency remains stable at over 95%.
2.4 Lianyungang Chengxing Environmental Industries Co., Ltd. Boiler waste actual ultra-low temperature flue gas
In December 2022, ultra-low temperature catalyst tests were conducted in the Chenxing Environmental Protection 550T/D tailings incinerator in Lianyungang. The smoke temperature of the bagged dust collector is about 130-150 ℃, and the initial NOx concentration in the flue gas is less than 150mg/Nm3. The average output value of NOx in the entire test device is 6.5mg/Nm3, and the average output value of sulfur+chlorine is less than 10mg/Nm3. The system resistance is 500Pa after a continuous stable test for one month.
Advantages of using ultra-low temperature DNT SCR catalyst in waste energy
3.1 Benefits of using ultra-low temperature catalysts to remove nitrates in the waste incineration industry
At present, in the market, the denitrification of waste incineration flue gas mainly adopts the SCR medium and low temperature denitrification process, which generally uses honeycomb catalysts. In addition to the reactor and supporting equipment, the system also requires heaters and flue gas heat exchangers to heat the flue gas. This process is lengthy, with relatively large system resistance and area, and most importantly, the high operating costs required for heating.
The ultra-low temperature SCR desulfurization process uses particle catalysts and a matching moving layer reactor for desulfurization. The reactor is installed at the tail of the dust removal bag, with a simple process flow, small system resistance and area, and no need for heating, saving a lot of flue gas heating costs every year.