Haze control tool: low-temperature SCR denitrification catalyst and engineering technology
Publishdate：2016-11-14 Views：41
Haze is a combination of fog and haze. Haze is common in cities. Haze weather is a state of atmospheric pollution, and haze is a general description of the excessive content of various suspended particles in the atmosphere, especially PM2.5 is considered the "culprit" that causes haze weather. With the deterioration of air quality, the phenomenon of haze weather has increased and the harm has worsened. China has the highest pollutant emissions and has become one of the most severe PM2.5 pollutants, posing a severe environmental situation. The pollution levels in areas such as Beijing Tianjin Hebei, Yangtze River Delta, Chengdu Chongqing, and Central Plains have reached the highest in the world. The annual average concentration of PM2.5 has exceeded 70 micrograms/cubic meter, which is more than twice the standard and more than 7 times the guidance value of the health organization. PM2.5 contains various toxic and harmful substances, which directly affect the public's physical health. If PM2.5 pollution is not taken seriously, it will become a hidden danger to social stability.
During the 12th Five Year Plan period, a series of policies were introduced to promote the construction and standardized operation of dust removal, desulfurization, and denitrification devices in coal-fired power plants. Since 2011, the emissions of sulfur dioxide and nitrogen oxides in the thermal power industry have maintained a continuous annual decrease of nearly 10%. However, compared to the significant achievements in emission reduction in the thermal power industry, the pace of emission reduction in the non electric power industry is seriously lagging behind. Since 2011, the compound annual decrease in pollutant emissions from the non-metallic mining products industry (cement, glass, ceramics, etc.) and the black metal smelting and processing industry (steel, ferroalloys, etc.) has been only 2%. The metallurgical, building materials, chemical and other industrial industries are the main sources of atmospheric pollutants, and their emissions of smoke (powder) dust and nitrogen oxides are not lower than those of the thermal power industry. If the smoke control in non electric industries is not effectively controlled, it will weaken the collaborative governance effect of air pollution prevention and control in China. It is urgent to accelerate the reduction of pollutants in non electric industries in order to promote the continuous improvement of national environmental air quality. However, compared to the treatment of thermal power flue gas, the non electric industry is relatively less sound in terms of policies, standards, and mechanisms. The treatment technology and experience are not mature, and the treatment rate is seriously insufficient.
Sulfur dioxide, nitrogen oxides, and inhalable particulate matter are the main components of haze. As a major pollutant in the air of big cities, the combination of NOx and PM2.5 is one of the main causes of haze, seriously endangering people's physical health and social environment construction. The contribution rate of non electric power industries to NOx pollution is similar to that of the electric power industry. However, the control of NOx emissions in non power industries (including self owned power plants) has encountered significant difficulties, Because the exhaust gas temperature of industrial boilers (kilns) and equipment (such as industrial boilers, glass ceramic kilns, cement kilns, metallurgical sintering furnaces, coking and petrochemical system cracking equipment, etc.) in non power industries, as well as the NOx generated during production processes (such as stainless steel pickling, oxalic acid production, nitric acid production, etc.), are mostly below 300 ℃, and the exhaust gas conditions are complex and variable. The working temperature of SCR denitrification catalysts currently used in the power industry is between 300 ℃ and 400 ℃, and the flue gas conditions are stable. Therefore, it is difficult to directly use medium to high temperature (300 ℃~400 ℃) SCR catalytic processes to control NOx emissions in non power industries. Non electric denitrification is facing a technological gap, and it is imperative to accelerate the research of efficient treatment technologies for nitrogen oxides. Efficient and low-temperature SCR denitrification catalysts and engineering technologies have become research hotspots.
The current industrial application of denitrification technology mainly relies on selective catalytic reduction (SCR) denitrification technology using NH3 as the reducing agent, and the catalyst is the core of SCR denitrification technology. The denitrification catalyst system currently used in the power industry is V2O5-WO3 (or MoO3)/TiO2 vanadium based SCR catalyst, which operates at temperatures ranging from 300 ℃ to 400 ℃. For a long time, researchers have also been trying to study non vanadium based SCR catalysts and developed various non vanadium based low-temperature denitrification catalysts. However, these catalysts have many problems that need to be solved in the industrial application process, such as their resistance to H2O and SO2 poisoning, which are difficult to cope with the complex working conditions and flue gas composition of the domestic non power industry, and the high production cost of catalysts, It is difficult to industrially apply it on a large scale for denitrification in non power industries. China's SCR denitrification catalyst production technology and denitrification engineering technology are basically derived from foreign countries. Although the technology abroad is relatively mature, due to the significant difference in energy structure between China and the West, coal energy accounts for about 70% of the entire energy consumption. The treatment of high sulfur and high ash flue gas is difficult to solve solely relying on foreign technology, and this problem is more prominent in the denitrification field of non power industries. Faced with the particularity of controlling the emission of flue gas pollutants in non electric power industries due to the different industrial energy structures in China, as well as the limitations of non vanadium based low-temperature denitrification catalysts in dealing with low-temperature SCR denitrification in non electric power industries, professors He Hong and Li Jian from Beijing University of Technology have realized that reducing the operating temperature of mature vanadium based catalysts may be a feasible direction for the development of low-temperature SCR catalysts. Starting from adjusting the surface acidity and microstructure of vanadium based catalysts, Professor He Hong's team has developed a series of low-temperature SCR catalyst formulations and preparation processes after years of research. The working temperature range of the catalyst has been expanded to 160 ℃ to 400 ℃. Based on the basic formula of low-temperature SCR catalyst, Professor He Hong's team has conducted in-depth research and developed the molding formula and molding technology of honeycomb SCR catalyst. In 2012, Beijing Fangxin Lihua Technology Co., Ltd. was established in Beijing with the low-temperature SCR catalyst production technology of Beijing Institute of Technology as the core. It produced qualified third-generation low-temperature SCR catalyst products and began supplying them to the denitrification market. Afterwards, in order to improve and promote the industrial application of low-temperature SCR catalysts, Professor He Hong's team and Beijing Fangxin Lihua Technology Co., Ltd. developed low-temperature SCR industrial denitrification engineering technology and began to try the application of catalysts in various industries and establish demonstration projects. At present, the "Fangxin" low-temperature SCR denitrification catalyst has been upgraded to the fourth generation, with significantly improved resistance to H2O and SO2 poisoning, as well as denitrification efficiency. Personalized formulas and models of catalyst products have been developed to adapt to different industries and flue gas conditions for customers to choose from. By combining personalized formula catalysts, catalyst reactor design, and catalyst in-situ regeneration, advanced technologies can be created to provide comprehensive solutions for desulfurization, denitrification, and dust removal integrated flue gas treatment for enterprises. As of now, the low-temperature SCR denitrification catalyst and engineering technology of Beijing Fangxin Lihua Technology Co., Ltd. have been successfully applied to more than 20 sets of denitrification devices in various industries and are running well, receiving high recognition from the market.
Low temperature SCR catalysts and engineering technologies have significant application value and prospects in the non electric denitrification field. Currently, the domestic low-temperature denitrification market has not been fully launched, but the market capacity is huge, and the future application market prospects are broad. Beijing Fangxin Lihua Technology Co., Ltd. overcame numerous technical difficulties in less than 5 years from its establishment to achieving mass production and establishing industry demonstration projects, and ultimately led the country in the field of low-temperature denitrification. As a pioneer in the low-temperature denitrification market in China, the company not only solved the problem of low-temperature treatment to solve NOx under high sulfur conditions, but also created multiple domestic and international firsts in the industry, It has attracted high attention from both inside and outside the industry. For example: the first domestic low-temperature SCR denitration catalyst production enterprise with independent intellectual property rights, the first low-temperature SCR denitration performance, applied to the first domestic daily glass kiln low-temperature SCR denitration device, applied to the first domestic waste incineration low-temperature SCR denitration device, applied to the first domestic waste incineration low-temperature SCR denitration device, applied to the coke oven flue gas low-temperature denitration device, and purchased quantity of single low-temperature SCR denitration catalyst There are only cases of low-temperature denitrification with an air volume of over 1 million. Provided valuable technical experience for Beijing Fangxin Lihua to fully embrace the outbreak of the low-temperature denitrification market in the non power industry.
China is a major producer of daily glass, with daily glass production ranking among the top. Starting from January 1, 2014, the emission standards for atmospheric pollutants in the flat glass industry (GB26453-2011) officially began to be implemented; Starting from July 1, 2015, the emission standards of the "Emission Standards for Air Pollutants in the Electronic Glass Industry" (GB29495-2013) were officially implemented, which promoted the rapid development of nitrogen oxide emission control engineering in the daily glass industry. Although many enterprises have invested a large amount of funds in the treatment of industry waste gas in recent years, due to the unique characteristics of process, combustion, and waste gas composition, there are certain defects in waste gas treatment technology, which has become a major problem that troubles the industry. In terms of denitrification, the denitrification technologies currently being attempted by enterprises are mainly medium and high temperature SCR denitrification technology and ozone based denitrification technology. Medium to high temperature SCR denitrification requires raising the temperature of the raw flue gas, which consumes a large amount of energy. The catalyst is prone to poisoning (alkali metals) or failure due to being wrapped in viscous substances. After adopting this technology, the Shandong Pharmaceutical Glass Cover Unit was dismantled. The ozone oxidation denitrification technology has a low removal rate and high power consumption, and has been dismantled after two enterprises conducted experiments. The air pollutants in the daily glass industry are mainly generated by the exhaust gas from the heat storage horseshoe flame tank kiln. The composition of flue gas is complex and unstable, and the production of SO2 increases sharply during gas reversing. In addition, daily glass is produced continuously and cannot be shut down. There is currently no experience or technology at home or abroad for the high sulfur and low temperature denitrification treatment of glass kilns in the daily glass industry, which is significantly different from the flue gas of other industrial kilns. As a domestic furniture manufacturer with independent intellectual property rights in low-temperature SCR denitrification technology, Beijing Fangxin Lihua Technology Co., Ltd. relies on Beijing University of Technology to carry out technological innovation, continuously develop new technologies and markets. To fill the technological gap in the treatment of waste gas from daily glass, the company has invested more energy in the research and development of low-temperature SCR denitrification catalysts and engineering technologies for daily glass. Based on the complex working conditions of daily glass kilns and years of experience in low-temperature SCR denitrification engineering, the company has developed low-temperature SCR denitrification catalysts and engineering technologies suitable for daily glass denitrification. This technology has been favored by domestic daily glass enterprises. After the two production lines of Shandong Pharmaceutical Glass Brown Bottle and Workshop 2, the three and four production lines of Brown Bottle continue to use the company's products and technology. In addition, the company has partnered with Shandong Jiaoyang Environmental Protection to undertake low-temperature denitrification projects for daily glass enterprises such as Shengliyuan, Huapeng, Luguan, Sanhui, and Beihui. The denitrification device of the implemented project is operating well and has been highly praised by the owner. Practice has proven that the low-temperature SCR denitrification technology for daily use glass has a smooth process, stable operation, and significant treatment effects. The application of this technology has found a simple, economical, and effective method for the comprehensive treatment of smoke pollution in daily use glass kilns.
Starting from January 1, 2015, the emission standards of pollutants in the coking chemical industry (GB 16171-2012) have been officially implemented, promoting the rapid development of nitrogen oxide emission control engineering in the coking industry. According to the new coking environmental protection standards, the emission of nitrogen oxides in flue gas should reach 500 milligrams per standard cubic meter, and the emission of nitrogen oxides in flue gas in key areas should reach 150 milligrams per standard cubic meter. However, currently, the nitrogen oxides in flue gas of most coking enterprises are 1800 milligrams per standard cubic meter. According to data from the China Coking Industry Association, as of the end of 2014, more than 2000 coke ovens in the coking industry in China were able to truly meet the second period standards of the "Chemical Industry Pollutant Emission Standards for Coking" (50 mg/m3 of sulfur dioxide, 30 mg/m3 of smoke and dust, and 500 mg/m3 of nitrogen oxides), which is less than 90%. At present, there are more than 700 coke production enterprises above designated size in China, with over 2000 coking production lines. The exhaust gas temperature of coking furnaces is within 300 ℃, so low-temperature denitrification is the preferred process. As a leader in the low-temperature SCR denitrification industry, I am certainly very concerned about the coking denitrification market and have carried out relevant research work with foresight. After completing laboratory simulated flue gas tests, I aim to verify the denitrification performance, service life, and process rationality of low-temperature catalysts. In early 2014, Beijing Fangxin Lihua Technology Co., Ltd. took the lead in conducting low-temperature SCR measurement line tests on coke oven flue gas at Ningxia Baofeng Energy Group. The measurement line flue gas parameters were: flue gas volume of 1000Nm3/h, flue gas temperature of 180-300 ℃, imported flue gas nitrogen oxide content of 1500-2000mg/Nm3, dust content not exceeding 30mg/Nm3, and SO2 content of 300mg/m3. The conclusion drawn from the two month testing of the measuring line is that all equipment in the measuring line operates stably, and the process components such as flow equalization and diversion operate well. The impact of sulfur dioxide, smoke and dust on the catalyst is relatively small. For the denitrification of coking boilers, low-temperature SCR catalysts can be applied. Not only Beijing Fangxin Lihua Technology Co., Ltd., but also MCC Jiaonai (Dalian) Engineering Technology Co., Ltd., a leading design company in the coking industry, are paying close attention to the flue gas desulfurization and denitrification technology within its scope. In early July 2014, MCC Jiaonai (Dalian) Engineering Technology Co., Ltd., Anhui Tongxing Environmental Protection Engineering Co., Ltd., and Beijing Fangxin Lihua Technology Co., Ltd. collaborated to carry out a pilot test of desulfurization and denitrification of coke oven flue gas at Tangshan Dafeng Coking Plant. After several months of actual operation, the pilot plant for desulfurization and denitrification of coke oven flue gas in China achieved success in the low-temperature SCR denitrification pilot test. During the actual operation of this device, the denitrification system has maintained a good operating state, maintaining good denitrification efficiency under conditions of 180-280 ℃, with an actual efficiency greater than 90%. Combining detection data and daily record data, it is shown that the "Fangxin" high-efficiency SCR denitrification catalyst is suitable for coke oven flue gas denitrification. It not only has different denitrification activity and sulfur resistance, but also has stable efficiency without a downward trend. On March 25, 2015, Beijing Fangxin Lihua Technology Co., Ltd. was awarded a contract for the purchase of low-temperature SCR denitrification catalyst equipment for the EP project of Baosteel Zhanjiang Iron and Steel Co., Ltd.'s coke oven flue gas purification facility, which involved a large purchase volume of strip coke oven flue gas denitrification and single low-temperature SCR denitrification catalyst. The project has been running steadily for eight consecutive months, with an operating temperature of 210 ℃ and an outlet NOx level consistently below 100mg/m3. This is the only case of low-temperature denitrification with an air volume of over 1 million. On January 5, 2016, Metal Herald reported on the "Top Ten Technical News of the Steel Industry in 2015" in the B08 edition of the New Year's special issue. Among them, MCC Jiaonai's "coke oven flue gas desulfurization and denitrification device officially put into operation" ranked second. The Tiexiong Xinsha Coking and Denitration Project supplied by Beijing Fangxin Lihua Technology Co., Ltd. has also been in operation for over six months. With an inlet NOx of 1200mg/m3, the export NOx can be controlled below 100mg/m3. The outstanding low-temperature denitrification capability not only reflects the progressiveness of low-temperature SCR denitrification technology for coke oven flue gas, but also highlights the low activation temperature, good sulfur resistance, wide temperature window and high denitrification efficiency of Fangxin low-temperature SCR denitrification catalyst. The performance of Fangxin low-temperature SCR denitrification catalyst in low-temperature SCR denitrification of coke oven flue gas is incomparable to similar products at home and abroad. Recently, Beijing Fangxin Lihua Technology Co., Ltd. has successively won supply contracts for low-temperature SCR denitrification catalysts for coke oven flue gas from Shandong Haoyu and Guizhou Qiangui.
Low temperature SCR denitrification catalysts and engineering technologies have penetrated into various industries outside of the power industry due to their unique characteristics. We believe that through continuous innovation in the formulation of low-temperature SCR catalytic materials, the preparation process of low-temperature SCR catalytic materials, the molding formula and preparation process of low-temperature honeycomb SCR catalysts, and the integration of low-temperature SCR engineering technology, we can meet the denitrification needs of customers in different industries and under different flue gas conditions. The future market for low-temperature SCR denitrification is bright. To this end, we have launched a recruitment campaign for partners, whether they are peers in the SCR denitrification catalyst business or those focused on comprehensive air pollution control
Haze is a combination of fog and haze. Haze is common in cities. Haze weather is a state of atmospheric pollution, and haze is a general description of the excessive content of various suspended particles in the atmosphere, especially PM2.5 is considered the "culprit" that causes haze weather. With the deterioration of air quality, the phenomenon of haze weather has increased and the harm has worsened. China has the highest pollutant emissions and has become one of the most severe PM2.5 pollutants, posing a severe environmental situation. The pollution levels in areas such as Beijing Tianjin Hebei, Yangtze River Delta, Chengdu Chongqing, and Central Plains have reached the highest in the world. The annual average concentration of PM2.5 has exceeded 70 micrograms/cubic meter, which is more than twice the standard and more than 7 times the guidance value of the health organization. PM2.5 contains various toxic and harmful substances, which directly affect the public's physical health. If PM2.5 pollution is not taken seriously, it will become a hidden danger to social stability.
During the 12th Five Year Plan period, a series of policies were introduced to promote the construction and standardized operation of dust removal, desulfurization, and denitrification devices in coal-fired power plants. Since 2011, the emissions of sulfur dioxide and nitrogen oxides in the thermal power industry have maintained a continuous annual decrease of nearly 10%. However, compared to the significant achievements in emission reduction in the thermal power industry, the pace of emission reduction in the non electric power industry is seriously lagging behind. Since 2011, the compound annual decrease in pollutant emissions from the non-metallic mining products industry (cement, glass, ceramics, etc.) and the black metal smelting and processing industry (steel, ferroalloys, etc.) has been only 2%. The metallurgical, building materials, chemical and other industrial industries are the main sources of atmospheric pollutants, and their emissions of smoke (powder) dust and nitrogen oxides are not lower than those of the thermal power industry. If the smoke control in non electric industries is not effectively controlled, it will weaken the collaborative governance effect of air pollution prevention and control in China. It is urgent to accelerate the reduction of pollutants in non electric industries in order to promote the continuous improvement of national environmental air quality. However, compared to the treatment of thermal power flue gas, the non electric industry is relatively less sound in terms of policies, standards, and mechanisms. The treatment technology and experience are not mature, and the treatment rate is seriously insufficient.
Sulfur dioxide, nitrogen oxides, and inhalable particulate matter are the main components of haze. As a major pollutant in the air of big cities, the combination of NOx and PM2.5 is one of the main causes of haze, seriously endangering people's physical health and social environment construction. The contribution rate of non electric power industries to NOx pollution is similar to that of the electric power industry. However, the control of NOx emissions in non power industries (including self owned power plants) has encountered significant difficulties, Because the exhaust gas temperature of industrial boilers (kilns) and equipment (such as industrial boilers, glass ceramic kilns, cement kilns, metallurgical sintering furnaces, coking and petrochemical system cracking equipment, etc.) in non power industries, as well as the NOx generated during production processes (such as stainless steel pickling, oxalic acid production, nitric acid production, etc.), are mostly below 300 ℃, and the exhaust gas conditions are complex and variable. The working temperature of SCR denitrification catalysts currently used in the power industry is between 300 ℃ and 400 ℃, and the flue gas conditions are stable. Therefore, it is difficult to directly use medium to high temperature (300 ℃~400 ℃) SCR catalytic processes to control NOx emissions in non power industries. Non electric denitrification is facing a technological gap, and it is imperative to accelerate the research of efficient treatment technologies for nitrogen oxides. Efficient and low-temperature SCR denitrification catalysts and engineering technologies have become research hotspots.
The current industrial application of denitrification technology mainly relies on selective catalytic reduction (SCR) denitrification technology using NH3 as the reducing agent, and the catalyst is the core of SCR denitrification technology. The denitrification catalyst system currently used in the power industry is V2O5-WO3 (or MoO3)/TiO2 vanadium based SCR catalyst, which operates at temperatures ranging from 300 ℃ to 400 ℃. For a long time, researchers have also been trying to study non vanadium based SCR catalysts and developed various non vanadium based low-temperature denitrification catalysts. However, these catalysts have many problems that need to be solved in the industrial application process, such as their resistance to H2O and SO2 poisoning, which are difficult to cope with the complex working conditions and flue gas composition of the domestic non power industry, and the high production cost of catalysts, It is difficult to industrially apply it on a large scale for denitrification in non power industries. China's SCR denitrification catalyst production technology and denitrification engineering technology are basically derived from foreign countries. Although the technology abroad is relatively mature, due to the significant difference in energy structure between China and the West, coal energy accounts for about 70% of the entire energy consumption. The treatment of high sulfur and high ash flue gas is difficult to solve solely relying on foreign technology, and this problem is more prominent in the denitrification field of non power industries. Faced with the particularity of controlling the emission of flue gas pollutants in non electric power industries due to the different industrial energy structures in China, as well as the limitations of non vanadium based low-temperature denitrification catalysts in dealing with low-temperature SCR denitrification in non electric power industries, professors He Hong and Li Jian from Beijing University of Technology have realized that reducing the operating temperature of mature vanadium based catalysts may be a feasible direction for the development of low-temperature SCR catalysts. Starting from adjusting the surface acidity and microstructure of vanadium based catalysts, Professor He Hong's team has developed a series of low-temperature SCR catalyst formulations and preparation processes after years of research. The working temperature range of the catalyst has been expanded to 160 ℃ to 400 ℃. Based on the basic formula of low-temperature SCR catalyst, Professor He Hong's team has conducted in-depth research and developed the molding formula and molding technology of honeycomb SCR catalyst. In 2012, Beijing Fangxin Lihua Technology Co., Ltd. was established in Beijing with the low-temperature SCR catalyst production technology of Beijing Institute of Technology as the core. It produced qualified third-generation low-temperature SCR catalyst products and began supplying them to the denitrification market. Afterwards, in order to improve and promote the industrial application of low-temperature SCR catalysts, Professor He Hong's team and Beijing Fangxin Lihua Technology Co., Ltd. developed low-temperature SCR industrial denitrification engineering technology and began to try the application of catalysts in various industries and establish demonstration projects. At present, the "Fangxin" low-temperature SCR denitrification catalyst has been upgraded to the fourth generation, with significantly improved resistance to H2O and SO2 poisoning, as well as denitrification efficiency. Personalized formulas and models of catalyst products have been developed to adapt to different industries and flue gas conditions for customers to choose from. By combining personalized formula catalysts, catalyst reactor design, and catalyst in-situ regeneration, advanced technologies can be created to provide comprehensive solutions for desulfurization, denitrification, and dust removal integrated flue gas treatment for enterprises. As of now, the low-temperature SCR denitrification catalyst and engineering technology of Beijing Fangxin Lihua Technology Co., Ltd. have been successfully applied to more than 20 sets of denitrification devices in various industries and are running well, receiving high recognition from the market.
Low temperature SCR catalysts and engineering technologies have significant application value and prospects in the non electric denitrification field. Currently, the domestic low-temperature denitrification market has not been fully launched, but the market capacity is huge, and the future application market prospects are broad. Beijing Fangxin Lihua Technology Co., Ltd. overcame numerous technical difficulties in less than 5 years from its establishment to achieving mass production and establishing industry demonstration projects, and ultimately led the country in the field of low-temperature denitrification. As a pioneer in the low-temperature denitrification market in China, the company not only solved the problem of low-temperature treatment to solve NOx under high sulfur conditions, but also created multiple domestic and international firsts in the industry, It has attracted high attention from both inside and outside the industry. For example: the first domestic low-temperature SCR denitration catalyst production enterprise with independent intellectual property rights, the first low-temperature SCR denitration performance, applied to the first domestic daily glass kiln low-temperature SCR denitration device, applied to the first domestic waste incineration low-temperature SCR denitration device, applied to the first domestic waste incineration low-temperature SCR denitration device, applied to the coke oven flue gas low-temperature denitration device, and purchased quantity of single low-temperature SCR denitration catalyst There are only cases of low-temperature denitrification with an air volume of over 1 million. Provided valuable technical experience for Beijing Fangxin Lihua to fully embrace the outbreak of the low-temperature denitrification market in the non power industry.
China is a major producer of daily glass, with daily glass production ranking among the top. Starting from January 1, 2014, the emission standards for atmospheric pollutants in the flat glass industry (GB26453-2011) officially began to be implemented; Starting from July 1, 2015, the emission standards of the "Emission Standards for Air Pollutants in the Electronic Glass Industry" (GB29495-2013) were officially implemented, which promoted the rapid development of nitrogen oxide emission control engineering in the daily glass industry. Although many enterprises have invested a large amount of funds in the treatment of industry waste gas in recent years, due to the unique characteristics of process, combustion, and waste gas composition, there are certain defects in waste gas treatment technology, which has become a major problem that troubles the industry. In terms of denitrification, the denitrification technologies currently being attempted by enterprises are mainly medium and high temperature SCR denitrification technology and ozone based denitrification technology. Medium to high temperature SCR denitrification requires raising the temperature of the raw flue gas, which consumes a large amount of energy. The catalyst is prone to poisoning (alkali metals) or failure due to being wrapped in viscous substances. After adopting this technology, the Shandong Pharmaceutical Glass Cover Unit was dismantled. The ozone oxidation denitrification technology has a low removal rate and high power consumption, and has been dismantled after two enterprises conducted experiments. The air pollutants in the daily glass industry are mainly generated by the exhaust gas from the heat storage horseshoe flame tank kiln. The composition of flue gas is complex and unstable, and the production of SO2 increases sharply during gas reversing. In addition, daily glass is produced continuously and cannot be shut down. There is currently no experience or technology at home or abroad for the high sulfur and low temperature denitrification treatment of glass kilns in the daily glass industry, which is significantly different from the flue gas of other industrial kilns. As a domestic furniture manufacturer with independent intellectual property rights in low-temperature SCR denitrification technology, Beijing Fangxin Lihua Technology Co., Ltd. relies on Beijing University of Technology to carry out technological innovation, continuously develop new technologies and markets. To fill the technological gap in the treatment of waste gas from daily glass, the company has invested more energy in the research and development of low-temperature SCR denitrification catalysts and engineering technologies for daily glass. Based on the complex working conditions of daily glass kilns and years of experience in low-temperature SCR denitrification engineering, the company has developed low-temperature SCR denitrification catalysts and engineering technologies suitable for daily glass denitrification. This technology has been favored by domestic daily glass enterprises. After the two production lines of Shandong Pharmaceutical Glass Brown Bottle and Workshop 2, the three and four production lines of Brown Bottle continue to use the company's products and technology. In addition, the company has partnered with Shandong Jiaoyang Environmental Protection to undertake low-temperature denitrification projects for daily glass enterprises such as Shengliyuan, Huapeng, Luguan, Sanhui, and Beihui. The denitrification device of the implemented project is operating well and has been highly praised by the owner. Practice has proven that the low-temperature SCR denitrification technology for daily use glass has a smooth process, stable operation, and significant treatment effects. The application of this technology has found a simple, economical, and effective method for the comprehensive treatment of smoke pollution in daily use glass kilns.
Starting from January 1, 2015, the emission standards of pollutants in the coking chemical industry (GB 16171-2012) have been officially implemented, promoting the rapid development of nitrogen oxide emission control engineering in the coking industry. According to the new coking environmental protection standards, the emission of nitrogen oxides in flue gas should reach 500 milligrams per standard cubic meter, and the emission of nitrogen oxides in flue gas in key areas should reach 150 milligrams per standard cubic meter. However, currently, the nitrogen oxides in flue gas of most coking enterprises are 1800 milligrams per standard cubic meter. According to data from the China Coking Industry Association, as of the end of 2014, more than 2000 coke ovens in the coking industry in China were able to truly meet the second period standards of the "Chemical Industry Pollutant Emission Standards for Coking" (50 mg/m3 of sulfur dioxide, 30 mg/m3 of smoke and dust, and 500 mg/m3 of nitrogen oxides), which is less than 90%. At present, there are more than 700 coke production enterprises above designated size in China, with over 2000 coking production lines. The exhaust gas temperature of coking furnaces is within 300 ℃, so low-temperature denitrification is the preferred process. As a leader in the low-temperature SCR denitrification industry, I am certainly very concerned about the coking denitrification market and have carried out relevant research work with foresight. After completing laboratory simulated flue gas tests, I aim to verify the denitrification performance, service life, and process rationality of low-temperature catalysts. In early 2014, Beijing Fangxin Lihua Technology Co., Ltd. took the lead in conducting low-temperature SCR measurement line tests on coke oven flue gas at Ningxia Baofeng Energy Group. The measurement line flue gas parameters were: flue gas volume of 1000Nm3/h, flue gas temperature of 180-300 ℃, imported flue gas nitrogen oxide content of 1500-2000mg/Nm3, dust content not exceeding 30mg/Nm3, and SO2 content of 300mg/m3. The conclusion drawn from the two month testing of the measuring line is that all equipment in the measuring line operates stably, and the process components such as flow equalization and diversion operate well. The impact of sulfur dioxide, smoke and dust on the catalyst is relatively small. For the denitrification of coking boilers, low-temperature SCR catalysts can be applied. Not only Beijing Fangxin Lihua Technology Co., Ltd., but also MCC Jiaonai (Dalian) Engineering Technology Co., Ltd., a leading design company in the coking industry, are paying close attention to the flue gas desulfurization and denitrification technology within its scope. In early July 2014, MCC Jiaonai (Dalian) Engineering Technology Co., Ltd., Anhui Tongxing Environmental Protection Engineering Co., Ltd., and Beijing Fangxin Lihua Technology Co., Ltd. collaborated to carry out a pilot test of desulfurization and denitrification of coke oven flue gas at Tangshan Dafeng Coking Plant. After several months of actual operation, the pilot plant for desulfurization and denitrification of coke oven flue gas in China achieved success in the low-temperature SCR denitrification pilot test. During the actual operation of this device, the denitrification system has maintained a good operating state, maintaining good denitrification efficiency under conditions of 180-280 ℃, with an actual efficiency greater than 90%. Combining detection data and daily record data, it is shown that the "Fangxin" high-efficiency SCR denitrification catalyst is suitable for coke oven flue gas denitrification. It not only has different denitrification activity and sulfur resistance, but also has stable efficiency without a downward trend. On March 25, 2015, Beijing Fangxin Lihua Technology Co., Ltd. was awarded a contract for the purchase of low-temperature SCR denitrification catalyst equipment for the EP project of Baosteel Zhanjiang Iron and Steel Co., Ltd.'s coke oven flue gas purification facility, which involved a large purchase volume of strip coke oven flue gas denitrification and single low-temperature SCR denitrification catalyst. The project has been running steadily for eight consecutive months, with an operating temperature of 210 ℃ and an outlet NOx level consistently below 100mg/m3. This is the only case of low-temperature denitrification with an air volume of over 1 million. On January 5, 2016, Metal Herald reported on the "Top Ten Technical News of the Steel Industry in 2015" in the B08 edition of the New Year's special issue. Among them, MCC Jiaonai's "coke oven flue gas desulfurization and denitrification device officially put into operation" ranked second. The Tiexiong Xinsha Coking and Denitration Project supplied by Beijing Fangxin Lihua Technology Co., Ltd. has also been in operation for over six months. With an inlet NOx of 1200mg/m3, the export NOx can be controlled below 100mg/m3. The outstanding low-temperature denitrification capability not only reflects the progressiveness of low-temperature SCR denitrification technology for coke oven flue gas, but also highlights the low activation temperature, good sulfur resistance, wide temperature window and high denitrification efficiency of Fangxin low-temperature SCR denitrification catalyst. The performance of Fangxin low-temperature SCR denitrification catalyst in low-temperature SCR denitrification of coke oven flue gas is incomparable to similar products at home and abroad. Recently, Beijing Fangxin Lihua Technology Co., Ltd. has successively won supply contracts for low-temperature SCR denitrification catalysts for coke oven flue gas from Shandong Haoyu and Guizhou Qiangui.
Low temperature SCR denitrification catalysts and engineering technologies have penetrated into various industries outside of the power industry due to their unique characteristics. We believe that through continuous innovation in the formulation of low-temperature SCR catalytic materials, the preparation process of low-temperature SCR catalytic materials, the molding formula and preparation process of low-temperature honeycomb SCR catalysts, and the integration of low-temperature SCR engineering technology, we can meet the denitrification needs of customers in different industries and under different flue gas conditions. The future market for low-temperature SCR denitrification is bright. To this end, we have launched a recruitment campaign for partners, whether they are peers in the SCR denitrification catalyst business or those focused on comprehensive air pollution control
