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Thermal power, steel, cement and other industries implement denitrification to reduce the emission of pollutants such as nitrogen oxides and avoid the formation of secondary pollution such as ozone, PM2.
5 and photochemical smog.
"It is estimated that after 2019, the annual waste of SCR (Selective Catalytic Reduction) denitrification catalysts in thermal power plants across the country will be as high as 50 million cubic meters.
" Xu Dongyao, a professor in the Department of Environment and Bioengineering of China University of Mining and Technology (Beijing) A reporter from the Daily said in an interview that discarded denitrification catalysts are hazardous wastes, which require at least 100 billion yuan in annual treatment costs and pose a huge threat to the ecological environment.
2019 will usher in a peak of denitrification catalyst scrapping.
2019 will usher in a peak of denitrification catalyst scrapping.
SCR commonly used denitrification catalysts use titanium dioxide, vanadium and tungsten as carriers and catalytically active substances, which themselves have potential environmental hazards; in the process of use, Heavy metals such as chromium, beryllium, arsenic and mercury in the flue gas will be adsorbed and enriched on the catalyst, and the catalyst becomes a harmful material containing various heavy metal components.
Therefore, developed countries and my country have included "waste flue gas denitration catalyst (vanadium-titanium series)" into hazardous waste.
According to data released by the Desulfurization and Denitrification Committee of China Environmental Protection Industry Association, as of the end of 2016, the country has put into operation the capacity of thermal power plant flue gas denitrification units of about 864 million kilowatts, accounting for 82% of the national thermal power unit capacity and 91.
7% of the national coal power unit capacity.
.
Xu Dongyao said that my country's thermal power units have been on large-scale SCR denitration projects since 2013.
About 80% of them use imported catalysts, and their service life is generally about 5 years.
Therefore, 2019 will usher in the first peak of catalyst scrapping.
It is estimated that in the thermal power industry alone, 50 million cubic meters of catalyst will be discarded every year.
Calculated according to the minimum treatment fee of 2,000 yuan/ton for hazardous waste, the annual treatment cost is as high as 100 billion yuan.
"With the deepening of air pollution control, in addition to the thermal power industry, my country has also put forward denitrification requirements for the steel, cement and glass industries, and it may expand to the chemical industry and industrial boilers in the future.
It can be said that the total amount of waste catalysts will only increase each year.
, The pressure on the ecological environment will also increase sharply.
" Xu Dongyao said.
The gap between catalyst technology and the international advanced level is about 10 years The difference between catalyst technology and the international advanced level is about 10 years.
Although at present, domestic denitration catalysts sell for about 30,000 to 40,000 yuan per cubic meter, while the imported ones are about 50,000 yuan per cubic meter.
However, most domestic enterprises, especially large enterprises, have chosen imported catalysts.
Xu Dongyao said that this is a helpless choice based on reality.
"The gap between my country's denitration catalyst technology and the international one is about 10 years.
" The average service life of domestic catalysts is 3 years, while imported ones are 5 years; the accuracy of domestic catalyst denitration indicators is unstable, and the deviation of imports does not exceed 5%.
“For large enterprises such as thermal power and steel that produce 24 hours a day, the cost of shutting down and replacing catalysts is huge.
If the denitrification efficiency is unstable and the emissions of nitrogen oxides are high and low, once the environmental protection department determines that the emission exceeds the standard, the company will face suspension of production.
Or huge fines.
”
Intensify research and development efforts in the “blank areas” of waste recycling.
At present, China adopts a qualification management system for hazardous waste treatment companies, that is, hazardous waste treatment companies must have relevant Qualifications.
Since there are few enterprises with disposal qualifications, the price of hazardous waste disposal has been soaring in recent years, and many hazardous wastes cannot be processed in time.
Xu Dongyao suggested that the country should take into account the arrival of the peak of catalyst waste and make preparations in advance.
The State Council also pointed out in the "Report on the Investigation and Treatment of Solid Waste Pollution Prevention and Control Law Enforcement Inspection Reports and Deliberation Opinions" that in the future, the construction of centralized disposal facilities for hazardous waste will be promoted.
"Abandoned denitrification catalysts are renewable and resource utilization.
" Xu Dongyao said that at present, the world basically adopts landfill treatment methods.
my country can start from this "blank" and increase its support for the research and development of waste catalyst regeneration and resource utilization technologies.
In this way, it can not only save a lot of resources and the cost of transportation and disposal of this kind of hazardous waste, and avoid the adverse impact of incineration or landfill on the ecological environment, but also pull the front end from the end to shorten the 10-year technological gap with the international technology and achieve curve surpassing. According to statistics, the accumulated stock of desulfurized gypsum in my country is about 130 million tons, occupying a large amount of land.
Xu Dongyao said that if a strong oxidation process was added to increase the calcium sulfate content during the desulfurization project, desulfurization gypsum will become a qualified raw material for cement production, which can greatly alleviate the environmental problems caused by desulfurization gypsum.
"Therefore, in terms of discarded denitrification catalysts, we should avoid repeating the mistakes of desulfurization gypsum, make arrangements and start early.
Source: Science and Technology Daily
5 and photochemical smog.
"It is estimated that after 2019, the annual waste of SCR (Selective Catalytic Reduction) denitrification catalysts in thermal power plants across the country will be as high as 50 million cubic meters.
" Xu Dongyao, a professor in the Department of Environment and Bioengineering of China University of Mining and Technology (Beijing) A reporter from the Daily said in an interview that discarded denitrification catalysts are hazardous wastes, which require at least 100 billion yuan in annual treatment costs and pose a huge threat to the ecological environment.
2019 will usher in a peak of denitrification catalyst scrapping.
2019 will usher in a peak of denitrification catalyst scrapping.
SCR commonly used denitrification catalysts use titanium dioxide, vanadium and tungsten as carriers and catalytically active substances, which themselves have potential environmental hazards; in the process of use, Heavy metals such as chromium, beryllium, arsenic and mercury in the flue gas will be adsorbed and enriched on the catalyst, and the catalyst becomes a harmful material containing various heavy metal components.
Therefore, developed countries and my country have included "waste flue gas denitration catalyst (vanadium-titanium series)" into hazardous waste.
According to data released by the Desulfurization and Denitrification Committee of China Environmental Protection Industry Association, as of the end of 2016, the country has put into operation the capacity of thermal power plant flue gas denitrification units of about 864 million kilowatts, accounting for 82% of the national thermal power unit capacity and 91.
7% of the national coal power unit capacity.
.
Xu Dongyao said that my country's thermal power units have been on large-scale SCR denitration projects since 2013.
About 80% of them use imported catalysts, and their service life is generally about 5 years.
Therefore, 2019 will usher in the first peak of catalyst scrapping.
It is estimated that in the thermal power industry alone, 50 million cubic meters of catalyst will be discarded every year.
Calculated according to the minimum treatment fee of 2,000 yuan/ton for hazardous waste, the annual treatment cost is as high as 100 billion yuan.
"With the deepening of air pollution control, in addition to the thermal power industry, my country has also put forward denitrification requirements for the steel, cement and glass industries, and it may expand to the chemical industry and industrial boilers in the future.
It can be said that the total amount of waste catalysts will only increase each year.
, The pressure on the ecological environment will also increase sharply.
" Xu Dongyao said.
The gap between catalyst technology and the international advanced level is about 10 years The difference between catalyst technology and the international advanced level is about 10 years.
Although at present, domestic denitration catalysts sell for about 30,000 to 40,000 yuan per cubic meter, while the imported ones are about 50,000 yuan per cubic meter.
However, most domestic enterprises, especially large enterprises, have chosen imported catalysts.
Xu Dongyao said that this is a helpless choice based on reality.
"The gap between my country's denitration catalyst technology and the international one is about 10 years.
" The average service life of domestic catalysts is 3 years, while imported ones are 5 years; the accuracy of domestic catalyst denitration indicators is unstable, and the deviation of imports does not exceed 5%.
“For large enterprises such as thermal power and steel that produce 24 hours a day, the cost of shutting down and replacing catalysts is huge.
If the denitrification efficiency is unstable and the emissions of nitrogen oxides are high and low, once the environmental protection department determines that the emission exceeds the standard, the company will face suspension of production.
Or huge fines.
”
Intensify research and development efforts in the “blank areas” of waste recycling.
At present, China adopts a qualification management system for hazardous waste treatment companies, that is, hazardous waste treatment companies must have relevant Qualifications.
Since there are few enterprises with disposal qualifications, the price of hazardous waste disposal has been soaring in recent years, and many hazardous wastes cannot be processed in time.
Xu Dongyao suggested that the country should take into account the arrival of the peak of catalyst waste and make preparations in advance.
The State Council also pointed out in the "Report on the Investigation and Treatment of Solid Waste Pollution Prevention and Control Law Enforcement Inspection Reports and Deliberation Opinions" that in the future, the construction of centralized disposal facilities for hazardous waste will be promoted.
"Abandoned denitrification catalysts are renewable and resource utilization.
" Xu Dongyao said that at present, the world basically adopts landfill treatment methods.
my country can start from this "blank" and increase its support for the research and development of waste catalyst regeneration and resource utilization technologies.
In this way, it can not only save a lot of resources and the cost of transportation and disposal of this kind of hazardous waste, and avoid the adverse impact of incineration or landfill on the ecological environment, but also pull the front end from the end to shorten the 10-year technological gap with the international technology and achieve curve surpassing. According to statistics, the accumulated stock of desulfurized gypsum in my country is about 130 million tons, occupying a large amount of land.
Xu Dongyao said that if a strong oxidation process was added to increase the calcium sulfate content during the desulfurization project, desulfurization gypsum will become a qualified raw material for cement production, which can greatly alleviate the environmental problems caused by desulfurization gypsum.
"Therefore, in terms of discarded denitrification catalysts, we should avoid repeating the mistakes of desulfurization gypsum, make arrangements and start early.
Source: Science and Technology Daily
