Purification of high concentration NOX by supergravity method

During the nitrification process in the fire industry, high concentrations of nitrogen oxides (commonly known as "nitrate smoke") are emitted, causing serious pollution and making it difficult to control. The traditional atmospheric purification technology adopts multi-stage absorption, but the effect is still not ideal, with emission concentrations as high as about 5000mg/m ³. North China University has applied supergravity technology to the purification and treatment of high concentration nitrate smoke in the fire industry, and created a water cooling process for supergravity atmospheric pressure purification of high concentration NOx. After adopting this process, with an inlet concentration of 18000mg/m, through two-stage deep purification and supergravity absorption, combined with the reduction decomposition tower process, the nitrate concentration can be reduced to below 240mg/m ³, and the NOx emissions can be reduced by 95%, meeting the emission standards. Compared with existing tower equipment, the cost can be reduced by more than 30%, the investment can be saved by 75%, and the operating costs can be reduced by 79%. This provides a new method for effectively solving the problem of high concentration nitrate pollution and has good industrial application prospects. Demonstration projects have been established in Xing'an, Shanxi and Yinguang, Gansu.