Tungsten trioxide SCR denitration catalyst will take more than 1/3 of the whole cost in the SCR denitration system. Currently, the technology has been widely used in the thermal power industry, 95% of the production line using SCR denitration technology in China, while there are successfully applications in the glass furnace and other industrial furnaces.

 

Tungsten trioxide SCR denitration catalyst can still have a good denitration effect, even at high nitrogen oxide emissions in power industry, so to achieve the emissions requirements. Ideally, the denitration rate SCR technology can enable the state of more than 90%, besides, the ammonia injected will almost completely react with nitrogen oxide makes it the best treatment technology for stationary sources denitration currently.

 

However, the fact is, SCR denitration, as the highly efficient technology is rarely applied in the cement industry. Why is this? Research indicates the unfavorable factors such as complex environmental conditions and higher investment at one-time limit the application. Its cost limitations performance as these, equipment increased means taking more space, large investment and higher operating costs.

 

The honeycomb tungsten trioxide SCR denitration catalyst is the most commonly used, which is taking the porous titanium dioxide as carrier, vanadium pentoxide and tungsten trioxide as the main active ingredients, with the optimum reaction temperature about 300℃~400 ℃. In the new industrial production, the temperature of exhaust emissions have been dropped to below 300℃; while, for implementing the national policy of saving energy and decreasing consuming, production lines more than 2500t/d are installing waste heat boiler, thus the exhaust gas temperature is about 150 ℃, all these above have presented new challenges to denitration catalyst. Thus, low-temperature denitration has become technical difficulty of tungsten trioxide SCR denitration catalyst.