Selective non-catalytic reduction (SNCR)

With the study of relationship between NOx removal efficiency and some reaction conditions,such as different reductants, reaction temperature, and residence time and so on,through the flow field simulation of CFD, the process of SNCR is optimized to maximize the denitrification rate. The SNCR technology can be used in different furnaces,and the denitrification rate is up to 50%, better case can reach more than60%, with the reduction of energy consumption.
       Typical SNCR process is mainly composed of reductant storage and preparation, transportation, metering and distributing system, injection system, electrical control system and other components.

The main agent is urea, prepared into 50% urea solution, transported to the metering mixer, diluted with dilute water to 10% urea solution, accurately assigned to each spray gunthrough the metering and distributing device, sprayed into thefurnacearea of 900 degrees centigrade -1000 degrees centigrade. The urea reacts with nitrogen oxides to form N2 and H2O, thus achieving the purpose of removing nitrogen oxides.

Technical Features:

1. For different type of boilers, denitrification efficiency is up to 50% or more

2. Ammonia escape rate is less than 10ppm

3. System is simple, investment is savings,construction period is short

4. No catalyst, low investment and operating costs

5. Less occupied area

Main Process Flow Diagram