【Haichuan’s Best Practices】The first ultra-low-temperature denitrification project for alumina clinker kilns in China is now operating successfully

According to the Polaris News Network, recently, the first set of flue gas denitration systems for alumina clinker kilns at China Aluminium Corporation – specifically the ultra-low temperature SCR (Selective Catalytic Reduction) denitration towers installed in Kiln No. 6 and Kiln No. 5 at Chinalco Shandong New Materials Company – were put into operation. These systems were developed jointly by Jiangxi Xinke Environmental Protection Co., Ltd., China National Building Materials Research Institute, Century Huayang Environmental Engineering Co., Ltd., and Shandong Rili Environmental Protection Technology Co., Ltd. Tests conducted by relevant authorities showed that all parameters related to the flue gas met standards that are even stricter than those for ultra-low emissions, thus achieving the desired results.

The denitrification projects for Kiln No. 6 and Kiln No. 5 at Chinalco Shandong New Materials Company employ the internationally advanced ultra-low-temperature SCR denitrification technology. This technology primarily consists of an SCR catalytic reactor, a urea pyrolysis system, an ammonia injection system, a catalyst thermal regeneration system, and an automatic tracking control system. It enables the conversion of nitrogen oxides in exhaust gases into nitrogen and water under the action of the catalyst, thereby preventing secondary pollution.

In terms of equipment selection and catalyst choice, Xinke Environmental Protection, China National Building Materials Group, and Century Huayang carried out full cooperation. During the production of catalysts for this project, Xinke Environmental Protection overcame difficulties such as tight deadlines, heavy workload, and high technical challenges, working overtime to ensure that the catalysts required for the project were delivered on time just before National Day. This project adopted an ultra-low-temperature SCR catalyst suitable for clinker kilns with low temperatures, high humidity, and high nitrogen oxide removal efficiency, reducing the SCR denitration temperature to 170°C. The use of this SCR catalyst is a first in the entire aluminum industry, marking the beginning of large-scale application of ultra-low temperature SCR catalysts.

Major breakthrough achieved in low-temperature SCR denitration catalyst materials by China National Building Materials Research Institute. Source: China National Building Materials Research Institute. Author: Liang Hailong. Date: 2016/12/16 14:27:14. I want to submit an article. Category: Air pollution control. Keywords: Low-temperature denitration catalysts, SCR catalysts, China National Building Materials Research Institute. The 2019 “Polaris Cup” awards for the top 10 enterprises in flue gas treatment will be presented from October 28th to November 1st in Beijing. The Second Industrial Flue Gas Treatment Summit Forum will take place on November 7th-8th in Beijing. According to Polaris Air Pollution Network, with the emergence of smog, the increasingly serious problem of air pollution has begun to attract widespread attention across the country. The non-power industries, especially the building materials industry, which are industries with high energy consumption and high pollution levels, have become one of the main focuses of efforts to reduce emissions. The Environmental Ceramic Research Institute of the China National Building Materials Research Institute promptly turned its attention to the control of flue gas emissions from industrial furnaces in sectors other than the power industry, and began developing low-temperature denitration catalyst materials for such furnaces. Through years of effort, a comprehensive research and pilot production platform has been established, a high-quality research team has been assembled, and a number of research achievements have been produced. Selective Catalytic Reduction (SCR) denitration technology is considered the most effective flue gas denitration method currently available, and it has been widely applied in thermal power plants. The principle is that, under the action of an SCR catalyst and using NH3 or urea as a reducing agent, it selectively reacts with NOx to produce non-toxic and pollution-free N2 and H2O. Among them, the denitration catalyst is the core of the SCR denitration technology; its composition, structure, and lifespan directly affect the efficiency of the flue gas denitration system. However, current commercial SCR catalysts require a high activity temperature range (300–400°C); at low temperatures,

The current SNCR denitration temperature requires 900–1100 degrees; if denitration can be achieved at 170 degrees, that would **reduce energy consumption**