The transition of the Chinese iron and steel industry to ultralow emissions has accelerated the development of denitrification technologies.Considering the existing dual carbon targets,carbon emissions must be conside...The transition of the Chinese iron and steel industry to ultralow emissions has accelerated the development of denitrification technologies.Considering the existing dual carbon targets,carbon emissions must be considered as a critical indicator when comparing denitrification systems.Consequently,this study provided a comprehensive cost-benefit model for denitrification in the steel industry,encompassing additional carbon emissions resulting from the implementation of denitrification systems.Activated-carbon adsorption and selective catalytic reduction(SCR)systems are two efficient techniques for controlling NOx emissions during sintering.Based on thismodel,a cost-benefit analysis of these two typical systems was conducted,and the results indicated that the unit flue-gas abatement costs of SCR and activated-carbon adsorption systems were 0.00275 and 0.0126 CNY/m^(3),and the unit flue-gas abatement benefits were 0.0072 and 0.0179 CNY/m^(3),respectively.Additionally,the effect of operational characteristics on operating costs,including duration and material prices,was analyzed.When treating the flue gas,the two systems released 0.0020 and 0.0060 kg/m^(3) of carbon dioxide,respectively.The primary sources of carbon emissions from the SCR and activated-carbon adsorption systems are the production of reducing agents and system operations,respectively.Furthermore,considering the features of the activated carbon adsorption system for simultaneous desulfurization,a SCR-wet flue gas desulfurization(WFGD)technology route was developed for comparison with the activated carbon adsorption system.展开更多
In recent years, with the increasing emphasis of the state on environmental protection, various environmental protection policies have been introduced one after another. As a heavily polluted industry, thermal power g...In recent years, with the increasing emphasis of the state on environmental protection, various environmental protection policies have been introduced one after another. As a heavily polluted industry, thermal power generation industry has felt the increasing environmental protection pressure and supervision intensity year by year. Environmental protection discharge is a red line that enterprises cant cross. The Technical Specification for Application and Issuance of Pollutant Discharge Permit in Thermal Power Industry and the Rules for Marking Automatic Monitoring Data of Pollutant Discharge Units in Thermal Power, Cement and Paper Industry clearly require that the unit should not be connected to the grid for more than 4 hours. The newly issued local standard of Jiangsu province, Emission Standard of Air Pollutants from Stationary Gas Turbines (DB32/3967-2021), stipulates that since 2023, the existing fixed gas turbines will implement the emission limit requirement of 30 mg/m3 (standard state, dry basis, 15% O2). On this premise, most existing gas turbines need to be denitrated before they can meet the emission standards. This paper takes a gas turbine in a power plant in Jiangsu as an example.展开更多
With the support of energy-saving and environmental protection technical measures of thermal power plants, the application quality of flue gas desulfurization and denitrification technology will be significantly impro...With the support of energy-saving and environmental protection technical measures of thermal power plants, the application quality of flue gas desulfurization and denitrification technology will be significantly improved, and the production supply chains with substandard quality can be targeted and screened according to the basic technical principles of physicochemical and biochemical reactions, so as to timely solve the source of various pollution problems. The precise application of flue gas desulfurization and denitrification technical measures in thermal power plants requires the timely establishment of a comprehensive monitoring system for environmental pollution sources. This paper will focus on the application of flue gas desulfurization and denitrification technology in thermal power plants and the key points of energy conservation and environmental protection.展开更多
基金supported by the National Key Research and Development Program of China(No.2022YFC3703403)Zhejiang Provincial“LeadWild Goose”Research and Development Project(No.2022C03073).
文摘The transition of the Chinese iron and steel industry to ultralow emissions has accelerated the development of denitrification technologies.Considering the existing dual carbon targets,carbon emissions must be considered as a critical indicator when comparing denitrification systems.Consequently,this study provided a comprehensive cost-benefit model for denitrification in the steel industry,encompassing additional carbon emissions resulting from the implementation of denitrification systems.Activated-carbon adsorption and selective catalytic reduction(SCR)systems are two efficient techniques for controlling NOx emissions during sintering.Based on thismodel,a cost-benefit analysis of these two typical systems was conducted,and the results indicated that the unit flue-gas abatement costs of SCR and activated-carbon adsorption systems were 0.00275 and 0.0126 CNY/m^(3),and the unit flue-gas abatement benefits were 0.0072 and 0.0179 CNY/m^(3),respectively.Additionally,the effect of operational characteristics on operating costs,including duration and material prices,was analyzed.When treating the flue gas,the two systems released 0.0020 and 0.0060 kg/m^(3) of carbon dioxide,respectively.The primary sources of carbon emissions from the SCR and activated-carbon adsorption systems are the production of reducing agents and system operations,respectively.Furthermore,considering the features of the activated carbon adsorption system for simultaneous desulfurization,a SCR-wet flue gas desulfurization(WFGD)technology route was developed for comparison with the activated carbon adsorption system.
文摘In recent years, with the increasing emphasis of the state on environmental protection, various environmental protection policies have been introduced one after another. As a heavily polluted industry, thermal power generation industry has felt the increasing environmental protection pressure and supervision intensity year by year. Environmental protection discharge is a red line that enterprises cant cross. The Technical Specification for Application and Issuance of Pollutant Discharge Permit in Thermal Power Industry and the Rules for Marking Automatic Monitoring Data of Pollutant Discharge Units in Thermal Power, Cement and Paper Industry clearly require that the unit should not be connected to the grid for more than 4 hours. The newly issued local standard of Jiangsu province, Emission Standard of Air Pollutants from Stationary Gas Turbines (DB32/3967-2021), stipulates that since 2023, the existing fixed gas turbines will implement the emission limit requirement of 30 mg/m3 (standard state, dry basis, 15% O2). On this premise, most existing gas turbines need to be denitrated before they can meet the emission standards. This paper takes a gas turbine in a power plant in Jiangsu as an example.
文摘With the support of energy-saving and environmental protection technical measures of thermal power plants, the application quality of flue gas desulfurization and denitrification technology will be significantly improved, and the production supply chains with substandard quality can be targeted and screened according to the basic technical principles of physicochemical and biochemical reactions, so as to timely solve the source of various pollution problems. The precise application of flue gas desulfurization and denitrification technical measures in thermal power plants requires the timely establishment of a comprehensive monitoring system for environmental pollution sources. This paper will focus on the application of flue gas desulfurization and denitrification technology in thermal power plants and the key points of energy conservation and environmental protection.
