He Hong: Dedicated to the localization of low-temperature SCR denitrification technology
Publishdate：2015-07-06 Views：18
Currently, the environmental problems caused by energy consumption are becoming increasingly serious, among which harmful substances such as smoke, sulfur dioxide, and nitrogen oxides are the main sources of air pollution, acid rain, and greenhouse effect, posing a serious threat to people's physical health and social environment construction. Especially nitrogen oxides (NOx) have become a curse of urban haze weather, and their management has also attracted the attention of the whole society.
At present, although the emissions of nitrogen oxides from motor vehicle exhaust and the power industry have been significantly controlled, there are significant difficulties in controlling NOx emissions in non power industries (including self owned power plants). This is because the emission temperature of industrial boiler (kiln) equipment flue gas and process exhaust gas related to nitric acid production and use in non power industries is mostly below 300 ℃, It is difficult to directly use the SCR catalytic process used in the medium to high temperature (300-400 ℃) power industry to control NOx emissions. Moreover, coal accounts for 70% of China's energy structure, which is obviously different from that in the West. Its flue gas treatment of high sulfur and high ash is difficult to solve only by relying on foreign technology, and this problem is more prominent in the non power industry.
Professor He Hong from the Department of Chemistry and Chemical Engineering at the School of Environment and Energy Engineering, Beijing Institute of Technology, has been committed to exploring and researching low-temperature SCR industrial denitrification technology for a long time. Starting from solving the denitrification problem in the non power industry, he takes the molding formula and molding technology of honeycomb SCR catalysts as a breakthrough point, fully tapping into advanced domestic and foreign technological concepts. After nearly 10 years of unremitting efforts, he has finally developed low-temperature SCR catalytic materials with independent intellectual property rights The denitrification efficiency is as high as 90%, and the engineering and operating costs are far lower than the domestically produced low-temperature SCR industrial denitrification technology for medium and high temperature SCR denitrification.
Since 2003, Professor He Hong has led a team to carry out research and development work on low-temperature and high sulfur flue gas denitrification technology, He said, "We have chosen to reduce the operating temperature of the V2O5-WO3 (MoO3)/TiO2 catalyst, which has already been maturely applied, as a direction for the development of low-temperature SCR catalysts. Starting from adjusting the surface acidity and microstructure of the catalyst, after years of research, we have obtained a series of low-temperature SCR catalyst formulations and preparation processes. The working temperature range of the catalyst has been extended to 160-400oC." Based on the basic formula of low-temperature SCR catalysts, Professor He Hong's team has conducted in-depth research on the molding technology of honeycomb SCR catalysts.
The formation of honeycomb SCR catalysts is the core technology for achieving industrial production, and it is also the secret of various catalyst manufacturers, without mature literature and report references. Therefore, Professor He Hong and his team carefully screened each molding agent from the perspective of ceramic molding technology, and studied their compatibility and mutual coordination. After countless failures, we have finally mastered the molding formula and preparation process of low-temperature SCR catalysts, and produced qualified low-temperature SCR catalyst products. Afterwards, in order to improve and promote the industrial application of low-temperature SCR catalysts, they also developed low-temperature SCR industrial denitrification engineering technology. Starting from the denitrification experiment of a 10 ton industrial coal-fired boiler, they studied the effects of temperature, wind speed, NOx content, ash content, water vapor content, and O2 content on denitrification efficiency, and studied reactor design, flue gas flow equalization, and reducing agent injection technologies.
In 2012, Professor He Hong's team and Beijing Fangxin Lihua Technology Co., Ltd. successively undertook the nitrogen oxide purification system of Yunnan Titanium Industry's pickling line, the low-temperature denitrification project of Hefei Rainbow LCD Glass Co., Ltd., the NOx tail gas treatment project of Hubei Yitai Pharmaceutical Co., Ltd.'s oxalic acid oxidation process, and the nitrogen oxide purification system project of Guangzhou Iron and Steel Plant's self owned power plant boiler. The NOx tail gas treatment system of Hubei Yitai Pharmaceutical's oxidation process for oxalic acid production is the first denitrification project in China's oxalic acid industry to use domestically produced low-temperature SCR catalyst technology.
At present, Professor He Hong's team is collaborating with the company to solve the problem of low-temperature SCR catalyst application in low-temperature and high sulfur flue gas denitrification. The work content includes studying the generation of ammonium bisulfate (ABS) in the low-temperature SCR catalytic bed and the degree of damage to the SCR catalyst, the law of flue gas conditions - ABS generation - SCR catalyst failure, the operating conditions, control methods, and reactor design of low-temperature SCR catalytic denitrification equipment Coupling of SCR with desulfurization and dust removal equipment and in-situ regeneration technology of low-temperature SCR catalyst.
Continuing the past and opening up the future, He Hong and his team will develop low-temperature and high sulfur flue gas denitrification technology suitable for controlling pollutant emissions in industrial boilers (kilns) in China, starting from catalytic materials, SCR denitrification process design, equipment and in-situ regeneration technology, and contribute new opportunities to solving China's air pollution problem.
Currently, the environmental problems caused by energy consumption are becoming increasingly serious, among which harmful substances such as smoke, sulfur dioxide, and nitrogen oxides are the main sources of air pollution, acid rain, and greenhouse effect, posing a serious threat to people's physical health and social environment construction. Especially nitrogen oxides (NOx) have become a curse of urban haze weather, and their management has also attracted the attention of the whole society.
At present, although the emissions of nitrogen oxides from motor vehicle exhaust and the power industry have been significantly controlled, there are significant difficulties in controlling NOx emissions in non power industries (including self owned power plants). This is because the emission temperature of industrial boiler (kiln) equipment flue gas and process exhaust gas related to nitric acid production and use in non power industries is mostly below 300 ℃, It is difficult to directly use the SCR catalytic process used in the medium to high temperature (300-400 ℃) power industry to control NOx emissions. Moreover, coal accounts for 70% of China's energy structure, which is obviously different from that in the West. Its flue gas treatment of high sulfur and high ash is difficult to solve only by relying on foreign technology, and this problem is more prominent in the non power industry.
Professor He Hong from the Department of Chemistry and Chemical Engineering at the School of Environment and Energy Engineering, Beijing Institute of Technology, has been committed to exploring and researching low-temperature SCR industrial denitrification technology for a long time. Starting from solving the denitrification problem in the non power industry, he takes the molding formula and molding technology of honeycomb SCR catalysts as a breakthrough point, fully tapping into advanced domestic and foreign technological concepts. After nearly 10 years of unremitting efforts, he has finally developed low-temperature SCR catalytic materials with independent intellectual property rights The denitrification efficiency is as high as 90%, and the engineering and operating costs are far lower than the domestically produced low-temperature SCR industrial denitrification technology for medium and high temperature SCR denitrification.
Since 2003, Professor He Hong has led a team to carry out research and development work on low-temperature and high sulfur flue gas denitrification technology, He said, "We have chosen to reduce the operating temperature of the V2O5-WO3 (MoO3)/TiO2 catalyst, which has already been maturely applied, as a direction for the development of low-temperature SCR catalysts. Starting from adjusting the surface acidity and microstructure of the catalyst, after years of research, we have obtained a series of low-temperature SCR catalyst formulations and preparation processes. The working temperature range of the catalyst has been extended to 160-400oC." Based on the basic formula of low-temperature SCR catalysts, Professor He Hong's team has conducted in-depth research on the molding technology of honeycomb SCR catalysts.
The formation of honeycomb SCR catalysts is the core technology for achieving industrial production, and it is also the secret of various catalyst manufacturers, without mature literature and report references. Therefore, Professor He Hong and his team carefully screened each molding agent from the perspective of ceramic molding technology, and studied their compatibility and mutual coordination. After countless failures, we have finally mastered the molding formula and preparation process of low-temperature SCR catalysts, and produced qualified low-temperature SCR catalyst products. Afterwards, in order to improve and promote the industrial application of low-temperature SCR catalysts, they also developed low-temperature SCR industrial denitrification engineering technology. Starting from the denitrification experiment of a 10 ton industrial coal-fired boiler, they studied the effects of temperature, wind speed, NOx content, ash content, water vapor content, and O2 content on denitrification efficiency, and studied reactor design, flue gas flow equalization, and reducing agent injection technologies.
In 2012, Professor He Hong's team and Beijing Fangxin Lihua Technology Co., Ltd. successively undertook the nitrogen oxide purification system of Yunnan Titanium Industry's pickling line, the low-temperature denitrification project of Hefei Rainbow LCD Glass Co., Ltd., the NOx tail gas treatment project of Hubei Yitai Pharmaceutical Co., Ltd.'s oxalic acid oxidation process, and the nitrogen oxide purification system project of Guangzhou Iron and Steel Plant's self owned power plant boiler. The NOx tail gas treatment system of Hubei Yitai Pharmaceutical's oxidation process for oxalic acid production is the first denitrification project in China's oxalic acid industry to use domestically produced low-temperature SCR catalyst technology.
At present, Professor He Hong's team is collaborating with the company to solve the problem of low-temperature SCR catalyst application in low-temperature and high sulfur flue gas denitrification. The work content includes studying the generation of ammonium bisulfate (ABS) in the low-temperature SCR catalytic bed and the degree of damage to the SCR catalyst, the law of flue gas conditions - ABS generation - SCR catalyst failure, the operating conditions, control methods, and reactor design of low-temperature SCR catalytic denitrification equipment Coupling of SCR with desulfurization and dust removal equipment and in-situ regeneration technology of low-temperature SCR catalyst.
Continuing the past and opening up the future, He Hong and his team will develop low-temperature and high sulfur flue gas denitrification technology suitable for controlling pollutant emissions in industrial boilers (kilns) in China, starting from catalytic materials, SCR denitrification process design, equipment and in-situ regeneration technology, and contribute new opportunities to solving China's air pollution problem.
