To study the influences of methane on selective non-catalytic reduction (SNCR), the condition of flue gas composition was simulated on a drop tube furnace test rig, and the influences of a few of methane on SNCR temperature window, NOx reduction efficiency and ammonia slip from 650℃ to 1 150 ℃ were investigated, as well as reactivity of methane.

By using advanced commercial software CFX-TASCFLOW imported from abroad,a numerical simulation of said combined application on the W-shaped flame boilers of 300 MW unit in one power plant has been carried out,the key parameters suitable for temperature windows of SCNR being precisely calculated and analysed under different optimized combustion modes.

With the increasing of the mixing time,above 950 ℃,the denitration efficiency of SNCR process decreases,and the temperature window of SNCR becomes narrow.

By using the H image of GMS (Geostatlonary Meteorological Satellite) infrared digital data and the hourlytistical relationship between the hourly rainfall and cloud top temperature,change of the cloud top temperature in one hour has been established.

The cloud top temperature and the temperature at the point of cannonballs bursting,rockets starting to seed have been figured out by analyzing the nucleating mechanism of silver iodide,the seeding character of cannons and rockets and character of different kinds of cloud.

The cloud optical thickness, cloud particle effective radius and cloud top temperature are important parameters to determine cloud radiative properties, and it’s absolutely necessarily to make use of satellite data to get a worldwide information.