Fang Xinlihua: Craftsman Spirit to Create High Quality Low Temperature Denitration Catalysts
Publishdate：2018-03-28 Views：43
Play a platform role.The company has established a long-term cooperative research and development platform with Beijing University of Technology, fully leveraging its high-end research and development team and advanced testing equipment in research and inspection. In the past two years, it has achieved a series of achievements in basic theory and application research of low-temperature denitrification. It has developed specialized low-temperature SCR catalyst formulas and manufacturing technologies for industries such as waste incineration, papermaking, refractory materials, and shipbuilding, and has made important breakthroughs in improving the low-temperature activity, sulfur dioxide resistance, water resistance, alkali poisoning resistance, and strength of catalysts. After improving the formula, the low-temperature SCR catalytic activity of the product has been significantly improved, and the activation temperature of the denitrification reaction has decreased by more than 10 ℃ compared to the SCR catalyst produced by the company using the original formula and equipment. The product's sulfur dioxide resistance performance is particularly outstanding. R&D personnel used two SCR catalysts to evaluate the SCR activity under high sulfur conditions at 270 ℃ and 230 ℃, with NOx and SO2 concentrations of 1000mg/m3 and 3000mg/m3, and H2O concentration of 6%. The results showed that after 300 hours of continuous operation at 270 ℃, the denitrification efficiency of the catalyst gradually decreased from 99% to about 96%, and the denitrification efficiency only decreased by about 3%; According to the fitting curve extrapolation, the operating time required for the catalyst's denitrification efficiency to decrease to around 80% is 1360 hours; At 230 ℃, after 160 hours of continuous operation, the denitrification efficiency of the catalyst gradually decreased from 96% to about 94%, and the denitrification efficiency only decreased by about 2%; According to the same method of extrapolating catalyst activity changes, under these conditions, the time for the catalyst's denitrification efficiency to decrease to about 80% is 1280 hours. Based on this, it can be inferred that the catalyst has exceptional sulfur resistance. The strength of the catalyst has also been significantly improved, with longitudinal and transverse compressive strengths reaching 2.69 MPa and 1.2 MPa, respectively. In addition, the catalyst has strong ability to remove dioxins and has relatively low requirements for ammonia nitrogen ratio during operation, which can greatly save operating costs. Relevant data is currently undergoing third-party testing and the company will release it in a timely manner.
Emphasis on engineering research.Low temperature denitrification involves many industries, and there are also significant differences in flue gas conditions. To fully utilize the catalytic efficiency, it is necessary to effectively combine it with engineering applications. The company's R&D personnel are able to go deep into the site for each project, understand the entire process flow, site conditions, and the potential impact of various processes on denitrification catalysts. They can assist customers in selecting process routes in a targeted manner, and propose solutions for the design of denitrification equipment based on the technical performance and indicators of denitrification catalysts. A typical case is that the company has designed an efficient in-situ catalyst regeneration technology for some projects. When the SO2 content in the flue gas is relatively high, due to the low operating temperature of the SCR reaction using low-temperature denitrification technology, although the catalyst has good sulfur resistance and can reduce the generation of ammonium bisulfate, with the increase of time, ammonium bisulfate will still accumulate on the surface of the catalyst, covering the surface of the catalyst, leading to physical deactivation of the catalyst. The company adopts a reactor compartment design, which increases the temperature of the catalyst bed to 350 ℃ using hot air or flue gas without stopping production. This decomposes the ammonium sulfate and ammonium bisulfate attached to the catalyst surface, thereby restoring activity. For example, coking denitrification projects such as Tangshan Dafeng, Shandong Haoyu, and Qiangui Tianneng have all adopted this technology. The thermal regeneration cycle and frequency of catalysts depend on the content of SO2 in the flue gas, which is generally greater than six months. Based on the strong sulfur resistance and reliable regeneration process of catalysts, some projects have adopted the process of denitrification followed by desulfurization, such as Shandong Guangfu Coking and Tangshan Ruhong Industrial, with good operating results.
Strengthen quality management.The company has established a comprehensive quality management system, with strict operating procedures at every stage from raw material storage to product delivery. From powder preparation to mixing, drying, and calcination to finished products, activity and other quality control indicators are tested. Unqualified products are not allowed to leave the factory. In order to improve production and quality, the company invested in the construction of a 6000m3 low-temperature denitrification catalyst production line, which was officially put into operation in late July 2017. The trial production was successful, and the appearance, quality, strength, and activity of the products were significantly improved. At present, the production process quality control system developed by the Information Science Department of Beijing Institute of Technology is also being installed and debugged intensively. The system utilizes big data and cloud computing technology to effectively collect and analyze data from various modules and production nodes in production, inspection, and management. It can achieve information sharing, advance forecasting, safety warning, product quality traceability, and remote control. The system feedback is fast and efficient. After the system runs, it will improve product quality and enhance management efficiency.
Improve after-sales service.The company provides customers with comprehensive operation guidelines and personnel training, providing full service guidance on installation, debugging, and maintenance, with a response time of no more than 24 hours. In a responsible spirit, the company regularly arranges technical personnel to track and follow up on the operational projects, understand the project operation situation, listen to opinions, and solve practical problems on site. From July to September this year, the company's technical personnel, together with two PhDs from Beijing Institute of Technology, carried out a "look back" activity on projects such as Tiexiong Xinsha, Shandong Haoyu, Shandong Guangfu, Qiangui Tianneng, Baosteel Zhanjiang, etc. with testing equipment. They tested the operation data of each project, collected first-hand information, and conducted comprehensive analysis, forming a follow-up report, which showed that the operation status and indicators of each project were within the design values. In this event, we had a serious communication with the client units regarding the new problems caused by the improvement of environmental protection requirements in some areas, and put forward some reasonable suggestions to ensure that the owner can save operating costs to the maximum extent while complying with environmental standards.
Beijing Fangxin Lihua Technology Co., Ltd. will strive for excellence in the low-temperature denitrification industry, and use the spirit of a great country craftsman to create low-temperature denitrification products, making unremitting efforts for the construction of a beautiful China.
Play a platform role.The company has established a long-term cooperative research and development platform with Beijing University of Technology, fully leveraging its high-end research and development team and advanced testing equipment in research and inspection. In the past two years, it has achieved a series of achievements in basic theory and application research of low-temperature denitrification. It has developed specialized low-temperature SCR catalyst formulas and manufacturing technologies for industries such as waste incineration, papermaking, refractory materials, and shipbuilding, and has made important breakthroughs in improving the low-temperature activity, sulfur dioxide resistance, water resistance, alkali poisoning resistance, and strength of catalysts. After improving the formula, the low-temperature SCR catalytic activity of the product has been significantly improved, and the activation temperature of the denitrification reaction has decreased by more than 10 ℃ compared to the SCR catalyst produced by the company using the original formula and equipment. The product's sulfur dioxide resistance performance is particularly outstanding. R&D personnel used two SCR catalysts to evaluate the SCR activity under high sulfur conditions at 270 ℃ and 230 ℃, with NOx and SO2 concentrations of 1000mg/m3 and 3000mg/m3, and H2O concentration of 6%. The results showed that after 300 hours of continuous operation at 270 ℃, the denitrification efficiency of the catalyst gradually decreased from 99% to about 96%, and the denitrification efficiency only decreased by about 3%; According to the fitting curve extrapolation, the operating time required for the catalyst's denitrification efficiency to decrease to around 80% is 1360 hours; At 230 ℃, after 160 hours of continuous operation, the denitrification efficiency of the catalyst gradually decreased from 96% to about 94%, and the denitrification efficiency only decreased by about 2%; According to the same method of extrapolating catalyst activity changes, under these conditions, the time for the catalyst's denitrification efficiency to decrease to about 80% is 1280 hours. Based on this, it can be inferred that the catalyst has exceptional sulfur resistance. The strength of the catalyst has also been significantly improved, with longitudinal and transverse compressive strengths reaching 2.69 MPa and 1.2 MPa, respectively. In addition, the catalyst has strong ability to remove dioxins and has relatively low requirements for ammonia nitrogen ratio during operation, which can greatly save operating costs. Relevant data is currently undergoing third-party testing and the company will release it in a timely manner.
Emphasis on engineering research.Low temperature denitrification involves many industries, and there are also significant differences in flue gas conditions. To fully utilize the catalytic efficiency, it is necessary to effectively combine it with engineering applications. The company's R&D personnel are able to go deep into the site for each project, understand the entire process flow, site conditions, and the potential impact of various processes on denitrification catalysts. They can assist customers in selecting process routes in a targeted manner, and propose solutions for the design of denitrification equipment based on the technical performance and indicators of denitrification catalysts. A typical case is that the company has designed an efficient in-situ catalyst regeneration technology for some projects. When the SO2 content in the flue gas is relatively high, due to the low operating temperature of the SCR reaction using low-temperature denitrification technology, although the catalyst has good sulfur resistance and can reduce the generation of ammonium bisulfate, with the increase of time, ammonium bisulfate will still accumulate on the surface of the catalyst, covering the surface of the catalyst, leading to physical deactivation of the catalyst. The company adopts a reactor compartment design, which increases the temperature of the catalyst bed to 350 ℃ using hot air or flue gas without stopping production. This decomposes the ammonium sulfate and ammonium bisulfate attached to the catalyst surface, thereby restoring activity. For example, coking denitrification projects such as Tangshan Dafeng, Shandong Haoyu, and Qiangui Tianneng have all adopted this technology. The thermal regeneration cycle and frequency of catalysts depend on the content of SO2 in the flue gas, which is generally greater than six months. Based on the strong sulfur resistance and reliable regeneration process of catalysts, some projects have adopted the process of denitrification followed by desulfurization, such as Shandong Guangfu Coking and Tangshan Ruhong Industrial, with good operating results.
Strengthen quality management.The company has established a comprehensive quality management system, with strict operating procedures at every stage from raw material storage to product delivery. From powder preparation to mixing, drying, and calcination to finished products, activity and other quality control indicators are tested. Unqualified products are not allowed to leave the factory. In order to improve production and quality, the company invested in the construction of a 6000m3 low-temperature denitrification catalyst production line, which was officially put into operation in late July 2017. The trial production was successful, and the appearance, quality, strength, and activity of the products were significantly improved. At present, the production process quality control system developed by the Information Science Department of Beijing Institute of Technology is also being installed and debugged intensively. The system utilizes big data and cloud computing technology to effectively collect and analyze data from various modules and production nodes in production, inspection, and management. It can achieve information sharing, advance forecasting, safety warning, product quality traceability, and remote control. The system feedback is fast and efficient. After the system runs, it will improve product quality and enhance management efficiency.
Improve after-sales service.The company provides customers with comprehensive operation guidelines and personnel training, providing full service guidance on installation, debugging, and maintenance, with a response time of no more than 24 hours. In a responsible spirit, the company regularly arranges technical personnel to track and follow up on the operational projects, understand the project operation situation, listen to opinions, and solve practical problems on site. From July to September this year, the company's technical personnel, together with two PhDs from Beijing Institute of Technology, carried out a "look back" activity on projects such as Tiexiong Xinsha, Shandong Haoyu, Shandong Guangfu, Qiangui Tianneng, Baosteel Zhanjiang, etc. with testing equipment. They tested the operation data of each project, collected first-hand information, and conducted comprehensive analysis, forming a follow-up report, which showed that the operation status and indicators of each project were within the design values. In this event, we had a serious communication with the client units regarding the new problems caused by the improvement of environmental protection requirements in some areas, and put forward some reasonable suggestions to ensure that the owner can save operating costs to the maximum extent while complying with environmental standards.
Beijing Fangxin Lihua Technology Co., Ltd. will strive for excellence in the low-temperature denitrification industry, and use the spirit of a great country craftsman to create low-temperature denitrification products, making unremitting efforts for the construction of a beautiful China.
