Do denitrification catalysts also need to be disinfected?
Publishdate：2018-08-31 Views：40
Shandong Province recently released and implemented the "Technical Requirements for Selective Catalytic Reduction (SCR) Denitration Catalysts in Shandong Province" (hereinafter referred to as the "Technical Requirements"), which is a local standard for SCR flue gas denitration catalysts in China.
The Technical Requirements specify the terms and definitions, technical requirements, test methods, inspection rules, marking, packaging, transportation, and storage of SCR flue gas denitrification catalysts, which are applicable to catalyst products used in SCR flue gas denitrification in coal-fired power plants, steel plants, cement plants, chemical plants, glass plants, and other industrial boilers or kilns that produce harmful gases such as nitrogen oxides (NOx) in Shandong Province.
It is reported that Shandong Province has formulated the "Technical Requirements" mainly to standardize the technical standards of its flue gas denitrification catalyst products, avoid vicious competition of low price and low quality, and ensure the quality of flue gas denitrification catalysts.
Why is it necessary to separately develop catalyst technical standards?
The gradual promotion and application of new rare earth based efficient and non-toxic denitrification catalysts urgently require the formulation of corresponding technical requirements to provide guidance for the design, production, and testing of flue gas denitrification catalysts
"For SCR flue gas denitrification catalysts, there was no specific technical standard in China before, because this product and technology have long been monopolized by foreign countries. The denitrification catalysts used domestically mainly rely on imports, and even if there are several catalyst production lines in China, the intellectual property rights are still foreign." Professor Zhu Shemin from the School of Materials Science and Technology of Nanjing University of Technology, the main compiler of the "Technical Requirements, told reporters.
The reporter learned that currently, selective catalytic reduction (SCR) technology is mainly used for NOx treatment both domestically and internationally, with the core being the use of catalysts. The chemical composition of the catalysts is all made up of vanadium titanium metal oxide systems.
Zhu Shemin told reporters that this vanadium titanium based denitrification catalyst contains a highly toxic substance V2O5, which has a considerable solubility in water and can cause serious damage to the respiratory system and skin of the human body. Long term exposure can cause bronchitis, visual impairment, kidney damage, etc. This type of denitrification catalyst not only causes pollution during the production process, but also pollutes the environment again after being discarded.
It is understood that according to the relevant regulations recently issued by the Ministry of Environmental Protection, power plants should first regenerate failed catalysts, and failed and non renewable catalysts should be strictly treated in accordance with the relevant regulations on hazardous waste treatment and disposal for harmless treatment.
However, currently there are no qualified enterprises in China that can perform harmless treatment on expired catalysts. This means that in 2 to 3 years, at least 150000 to 200000 cubic meters of toxic waste catalysts will need to be treated annually, which will become a serious burden on China's environmental protection.
It is reported that in order to overcome the environmental pollution problems during the production and use of vanadium titanium system denitration catalysts and the problem of harmless treatment of waste catalysts, a large amount of funds, manpower, and material resources have been provided to support the research and development of domestically produced non-toxic SCR flue gas denitration catalysts. At present, this problem has been successfully overcome by Shandong Tiancan Environmental Protection Technology Co., Ltd.
The reporter learned that the rare earth based new denitrification catalyst developed by Tiancan Company, with rare earth as the main active ingredient, achieves efficient, non-toxic denitrification, no secondary pollution, can replace the highly toxic vanadium titanium system, and has obtained independent intellectual property rights of China's denitrification catalyst.
With the promotion and application of this new type of denitration catalyst product, it is urgent to develop corresponding technical requirements to establish a standard system for selective catalytic reduction denitration catalysts in Shandong Province, provide guidance documents for the design, production, testing and other work of flue gas denitration catalysts, and put forward relevant requirements for the physical and chemical performance and technical indicators of flue gas denitration catalysts to ensure that this new product can meet the usage requirements, Reduce unnecessary technical disputes.
We have determined the technical indicators and test methods of rare earth based catalysts, and strictly controlled the product size, compressive strength, wear rate, SO2 conversion rate, and V2O5 content of flue gas denitrification catalysts.
Denitration catalyst
Shandong Province recently released and implemented the "Technical Requirements for Selective Catalytic Reduction (SCR) Denitration Catalysts in Shandong Province" (hereinafter referred to as the "Technical Requirements"), which is a local standard for SCR flue gas denitration catalysts in China.
The Technical Requirements specify the terms and definitions, technical requirements, test methods, inspection rules, marking, packaging, transportation, and storage of SCR flue gas denitrification catalysts, which are applicable to catalyst products used in SCR flue gas denitrification in coal-fired power plants, steel plants, cement plants, chemical plants, glass plants, and other industrial boilers or kilns that produce harmful gases such as nitrogen oxides (NOx) in Shandong Province.
It is reported that Shandong Province has formulated the "Technical Requirements" mainly to standardize the technical standards of its flue gas denitrification catalyst products, avoid vicious competition of low price and low quality, and ensure the quality of flue gas denitrification catalysts.
Why is it necessary to separately develop catalyst technical standards?
The gradual promotion and application of new rare earth based efficient and non-toxic denitrification catalysts urgently require the formulation of corresponding technical requirements to provide guidance for the design, production, and testing of flue gas denitrification catalysts
"For SCR flue gas denitrification catalysts, there was no specific technical standard in China before, because this product and technology have long been monopolized by foreign countries. The denitrification catalysts used domestically mainly rely on imports, and even if there are several catalyst production lines in China, the intellectual property rights are still foreign." Professor Zhu Shemin from the School of Materials Science and Technology of Nanjing University of Technology, the main compiler of the "Technical Requirements, told reporters.
The reporter learned that currently, selective catalytic reduction (SCR) technology is mainly used for NOx treatment both domestically and internationally, with the core being the use of catalysts. The chemical composition of the catalysts is all made up of vanadium titanium metal oxide systems.
Zhu Shemin told reporters that this vanadium titanium based denitrification catalyst contains a highly toxic substance V2O5, which has a considerable solubility in water and can cause serious damage to the respiratory system and skin of the human body. Long term exposure can cause bronchitis, visual impairment, kidney damage, etc. This type of denitrification catalyst not only causes pollution during the production process, but also pollutes the environment again after being discarded.
It is understood that according to the relevant regulations recently issued by the Ministry of Environmental Protection, power plants should first regenerate failed catalysts, and failed and non renewable catalysts should be strictly treated in accordance with the relevant regulations on hazardous waste treatment and disposal for harmless treatment.
However, currently there are no qualified enterprises in China that can perform harmless treatment on expired catalysts. This means that in 2 to 3 years, at least 150000 to 200000 cubic meters of toxic waste catalysts will need to be treated annually, which will become a serious burden on China's environmental protection.
It is reported that in order to overcome the environmental pollution problems during the production and use of vanadium titanium system denitration catalysts and the problem of harmless treatment of waste catalysts, a large amount of funds, manpower, and material resources have been provided to support the research and development of domestically produced non-toxic SCR flue gas denitration catalysts. At present, this problem has been successfully overcome by Shandong Tiancan Environmental Protection Technology Co., Ltd.
The reporter learned that the rare earth based new denitrification catalyst developed by Tiancan Company, with rare earth as the main active ingredient, achieves efficient, non-toxic denitrification, no secondary pollution, can replace the highly toxic vanadium titanium system, and has obtained independent intellectual property rights of China's denitrification catalyst.
With the promotion and application of this new type of denitration catalyst product, it is urgent to develop corresponding technical requirements to establish a standard system for selective catalytic reduction denitration catalysts in Shandong Province, provide guidance documents for the design, production, testing and other work of flue gas denitration catalysts, and put forward relevant requirements for the physical and chemical performance and technical indicators of flue gas denitration catalysts to ensure that this new product can meet the usage requirements, Reduce unnecessary technical disputes.
We have determined the technical indicators and test methods of rare earth based catalysts, and strictly controlled the product size, compressive strength, wear rate, SO2 conversion rate, and V2O5 content of flue gas denitrification catalysts.
Denitration catalyst
