Recently, the first project of ultra-low temperature (150℃) SCR denitration in China, i.e. the Zhanjiang Iron Works' EP project of ultra-low temperature SCR denitration device for flue gas in pelletizing, under construction by CIEE which is a wholly-owned subsidiary of CIE, has been successfully completed and put into operation after going through the heat load commissioning.

For the SCR denitration technology, CIE has spent five years on the relevant technical breakthrough. Before they initiated their researching effort, the conventional medium-to-high temperature SCR denitration technology had been commonly used in the field of sintering and pelletizing for the disposal of flue gas. However, the cost of the fuel consumed by this technology dominates that of the whole denitration process by 70% or so. In order to reduce the cost of fuel consumption, CIE has carried out several experiments and bench-scale tests successively and then pilot tests in Taiyuan Iron & Steel (Group) Co., Ltd.(TISCO) for the basic data required for industrial applications. Finally, the ultra-low temperature (150℃) SCR denitration technology was successfully developed, laying a solid foundation for the realization of industrial applications.

Compared with the conventional medium-to-high temperature SCR denitration technology used in the process of sintering and pelletizing, this aforementioned technology can reduce the cost of gas heating by more than 50% on the pellet production line, and help Zhanjiang Iron & Steel Co., Ltd. to meet the national ultra-low emission standard for emission concentration of nitrogen oxides, sulfur dioxide, dust and other pollutants.

During the trial operation of this project, the system operates stably with all indexes reaching the design standards, meeting the requirement for ultra-low emission: The emission concentration of nitrogen oxides is 26.1 mg/Nm3, the emission concentration of sulfur dioxide is 6.5 mg/Nm3, the dust concentration is 8.8 mg/Nm3, and the ammonia escape ratio is controlled within 1 ppm.