SNCR (selective non-catalytic reduction) denitration device with energy-saving function

Abstract

The invention discloses an SNCR (selective non-catalytic reduction) denitration device with an energy-saving function, and relates to the technical field of denitration, the SNCR denitration device comprises a material conveying assembly, a mixing assembly, a reaction tower, a spraying assembly and a skid bottom plate, the material conveying assembly, the mixing assembly, the reaction tower and the upper surface of the skid bottom plate are fixedly connected, one end of the spraying assembly is connected with the mixing assembly, and the other end of the spraying assembly is fixed on the reaction tower. According to the mixing assembly, due to the regional temperature difference value of the urea solution, the heat needed by the urea solution sprayed into the reaction tower to reach the evaporation temperature is different, then the evaporation positions of the urea solution are different, and the different evaporation positions of the urea solution can enlarge the width of a temperature mutation layer caused by evaporation; the situation that the temperature difference between the position, close to the evaporation position, of the side wall of the reaction tower and other positions is too large due to evaporation position concentration is avoided, and deformation quantity concentration of the side wall of the reaction tower can be relieved to a great extent.

Description

technical field [0001] The invention relates to the technical field of denitrification, in particular to an SNCR denitrification device with an energy-saving function. Background technique [0002] The continuous development of modern industry has brought a great impact on the environment. The nitrogen oxides produced in the flue gas combustion process are particularly harmful to the environment. Every company needs to carry out denitrification treatment when discharging nitrogen oxides. At present, the mainstream denitrification processes on the market are divided into: SCR denitrification and SNCR denitrification. The investment of SCR is several times or even ten times that of SNCR, but it can improve However, the denitrification effect is very limited, and SNCR denitrification has become a better solution, but the development of SNCR denitrification devices is not mature enough, and there are the following problems: [0003] The traditional SNCR denitrification urea del...

AI Technical Summary

Problems solved by technology

[0003] The traditional SNCR denitrification urea delivery method is not accurate enough, and the urea consumption needs to be measured, which affects the working efficiency of the equipment

Moreover, traditional equipment cannot separate the agglomerated urea particles, which will cause the urea to melt for too long, and the traditional stirring method will easily cause urea to precipitate on the side wall of the mixing tank

On the other hand, after the traditional urea solution is sprayed into the reaction tower, its evaporation layer tends to the same position. Due to long-term evaporation and heat absorption at this position, its temperature will be quite different from other positions. In the long run, the regional temperature difference will be too large. The general assembly will cause a large deformation of the side wall of the reaction tower at the evaporation position, and the regional concentration of the deformation will seriously affect the service life of the reaction tower

Conventional SNCR denitrification lacks the recovery and utilization of flue gas heat after reaction, which easily causes energy loss

Images