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Technologies on Air pollution Control and Emission Reduction On Asia-Europe Air Pollution Prevention and Control Capacity Building Workshop Yan Zhongkai.

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Presentation on theme: "Technologies on Air pollution Control and Emission Reduction On Asia-Europe Air Pollution Prevention and Control Capacity Building Workshop Yan Zhongkai."— Presentation transcript:

1 Technologies on Air pollution Control and Emission Reduction On Asia-Europe Air Pollution Prevention and Control Capacity Building Workshop Yan Zhongkai China Association of Environmental Protection Industry (CAEPI) October 23, 2013

2 China Association of Environmental Protection Industry Contents 2.1 Dust removal 2.2 DeSOx 2.3 DeNOx 2.4 VOCs Treatment 2.5 Vehicle Exhaust Emission Control 2. Key technologies areas 1.Background 1

3 China Association of Environmental Protection Industry Current Situation  There has been an increasingly heavy air pollution in China. Many cities, such as Beijing has continuously encountered severe air pollution and haze weather  The grim situation intensifies the pressure on the control of air pollution. To cope with the increasingly serious air pollution, China has issued a series of laws and regulations and planning for the control of air pollution Policies  Action Plan for Air Pollution Prevention and Control (State Council [2013]37)  Key Areas of Air Pollution Prevention and Control during the Twelfth Five Year (MEP [2012]130)  On the Implementation of Air Pollutant Special Emission Limit Values (MEP Announcement No.14, 2013)  More stringent emission standards of air pollutants will be issued (thermal power, steel and other industries) 1. Background 2

4 China Association of Environmental Protection Industry 2. Key Technologies Areas → Dust removal→emphasize on industrial dust and fumes ( six industries and coal boiler ) → DeSOx →emphasize on thermal plant, steel, chemistry industry and coal boiler → DeNOx→emphasize on thermal plant, cement and industrial boiler → VOCs→organic solvent usage industry (coating, packaging, printing, furniture, etc.) → Vehicle exhaust emission control →emphasize on diesel vehicle exhaust emission 3

5 China Association of Environmental Protection Industry 2.1 Dust removal Dust removal technologies Low temperature electric dust removal technology Moving electrode type electrostatic precipitation Wet electric dust removal technology Electrostatic-fabric Integrated dust removal technology Electric agglomeration High frequency power supply for electrostatic precipitation High-end materials for bag filter Focus on the following efficient dust removal technologies with improving traditional electric technology (such as increasing the electric field and dust collection area, etc.), cloth bag dust removal technology 4

6 China Association of Environmental Protection Industry Low temperature electric dust removal technology Low temperature electric dust removal technology  The operating temperature drops from 120 ~130 ℃ to 85 ~110 ℃, dust resistivity reduces 1 ~ 2 magnitudes  The fume and dust emission concentration can be less than 30 mg/m 3 or even lower; Save the standard coal consumption of 1.0 ~ 3.5 g/kWh  There have been many application cases Case : 660 MW unit electric precipitator reconstruction project of a Fujian power plant  Dust emission drops from 60 mg/Nm 3 to below 30mg/Nm 3 5

7 China Association of Environmental Protection Industry Moving electrode type electrostatic precipitation Moving electrode type electrostatic precipitation  Only adopted in final field, especially suitable for the reconstruction of old units of electric precipitations  The dust removal rate is up to 99.8%, dust concentration in the exit is lower than 30mg/m 3, the lowest is lower than 10mg/m 3, the efficiency is increased from ordinary 50-70% to 70-90%  By the end of June this year, 300MW units and above have installed a total capacity of 25,000,000kW in contracts Case : A 300MW unit electric precipitator reconstruction in the second phase of a Hebei power plant  The fume and dust concentration in the exit drops from 150mg/m 3 to 32mg/m 3, which is lower than the designing value 40mg/m 3 6

8 China Association of Environmental Protection Industry Wet electric dust removal technology Wet electric dust removal technology (Wet deSOx tower flue gas treatment )  The dust removal rate is higher than 99.9%, the dust concentration in the exit can be controlled within 20mg/m³ or even lower than 5mg/m³, the removal rate of PM 2.5 is up to 95%  Has been applied in a 300 MW unit of a power plant in Yiyang City, Hunan Province with good effect 7

9 China Association of Environmental Protection Industry Electrostatic-fabric Integrated dust removal technology Electrostatic-fabric Integrated dust removal technology  especially suitable for electric precipitator reconstructed to electrostatic-fabric Integrated precipitator  The dust removal rate is up to 99.9%, the discharged dust concentration is lower than 30mg/m³ or even 10mg/m³, the collection efficiency of PM 2.5 is higher than 98%  Has been extensively applied in power plants 8

10 China Association of Environmental Protection Industry Electric agglomeration Electric agglomeration  Upgrade 30 ~ 80% of the collection efficiency of PM 2.5  There has been a contract capacity of about 2100MW by the end of March this year Case : A 300MW unit electric precipitator in No. 9 furnace is reconstructed in a power plant of Shanghai  The mass concentration of PM 2.5 in the exit has dropped from 15.7 mg/m 3 to 10.9 mg/m 3 9

11 China Association of Environmental Protection Industry High frequency power supply for electrostatic precipitator High frequency power supply for electrostatic precipitator  dust discharge decline 50 ~ 90 %,decrease power consumption 50 ~ 90%  Extensively applied Case : (2×1000MWunit) high frequency power supply renovated in a power plant of Shanghai  The dust concentration in the exit declined from 35 ~ 50mg/Nm 3 to10 ~ 23mg/Nm 3 10

12 China Association of Environmental Protection Industry High-end materials for bag filter High-end materials for bag filter  Technology development is long-life, efficiency and low resistance. Domestic enterprises have mastered the advanced filter spunlace production process, can greatly improve the efficiency and life of the filter and remove PM 2.5 to a great extent  Mainly develop high-end materials such as PPS, P84, PTFE and composite filter 11

13 China Association of Environmental Protection Industry 2.2 DeSOx De SO x Power plant Iron and steel sintering machine Industri al boiler Chemical Industry Improvement of limestone - gypsum method Resource utilization Circulating fluidized bed method, ammonia method, limestone - gypsum method, active coke adsorption method Large quantity in different areas , consume 1/3 of total coal consumption annually At present, China’s thermal power plant air pollutant emission standards is the world’s most stringent, was implemented in 2012 , dust 、 SO 2 、 No x emission limits were 30mg/m 3 、 100mg/m 3 、 100mg/m 3 12

14 China Association of Environmental Protection Industry DeSOx in power plant Improvement of limestone - gypsum method, increase the spray layer, add desulphurization synergist, using double towers and double absorption process (desulfurization efficiency above 98%, SO 2 emission concentrations of less than 50mg/m 3 ) etc. resource desulfurization technologies Ammonia method for resource utilization  DeSOx ratio≥95% , ammonium sulfate accords with the requirement of GB , ammonia escape≤8mg/m 3 Organic amine desulfurization technology ( adapt to the high sulfur coal )  Desulfurization efficiency is not sensitive to the sulfur content of the intake, processing SO 2 concentrations up to mg/m 3  The deSOx ratio is up to 99.8%,recycling SO 2 for producing H 2 SO 4  Has been demonstrated on a 600MW unit in a power plant in Guizhou Province 13

15 China Association of Environmental Protection Industry DeSOx for Sintering Machines  Sintering desulfurization process using more dispersed (unlike thermal power plants), including circulating fluidized bed method, ammonia method, limestone - gypsum method, active coke adsorption method etc., about 50% of the first three  China has more than 1,200 sets of sintering machines with a deSOx market capacity of 15 billion RMB 14

16 China Association of Environmental Protection Industry 2.3 DeNOx  By 2012, the deNOx units installed capacity has been up to 225 million kW, accounting for 27.27% of the thermal power installed capacity  The market demand will be 100 billion RMB during the 12th Five-Year Plan DeNOx Power plant Cement Industrial boiler SCR/SNCR/(SNCR+SCR ) LNB+SNCR SCR/SNCR/Ozonation 15

17 China Association of Environmental Protection Industry 2.4 VOCs treatment VOCs Pollution Control Technologies Policy (MEP Announcement No. 31, 2013) End-treatment leading technical route : High concentration VOCs→Condensation and recovery/adsorption and recovery Medium Concentration VOCs →adsorption and recovery/catalytic combustion/thermal incineration Low Concentration VOCs→ adsorption and recovery/adsorption, concentration and combustion/ plasma technology ( not recover ) Catering Industry→promote fume exhausting devices with oil mist recycling VOCs containing organic halogen elements → non incineration technology 16

18 China Association of Environmental Protection Industry 2.4 VOCs treatment Low temperature plasma technology for VOCs purification  The purification rate for low concentrations (less than 300 mg/m3 ) VOCs is more than 70% Typical Technologies Activated carbon adsorption recycling method  Removing(recycling) rate is 95%, the emission concentration is lower than 50 mg/m³ Adsorption (stripping) - catalytic combustion integrated method  Solves technical difficulties of VOCs with huge volume, low concentration Double dielectric barrier discharge plasma used for industrial odorous waste gas treatment  Can remove 90% VOCs, the emission concentration is lower than 50mg/m³ 17

19 China Association of Environmental Protection Industry 2.5 Vehicle Exhaust Emission Control DPF Capturing more than 95% of the particles in the exhaust gas, strong ability of capturing PM 2.5, the emission concentration is lower than 0.25 mg/L Technologies for diesel exhaust :  Internal combustion technology /EGR+ SCR/DPF  DOC+DPF/POC+SCR SCR Removal of more than 70% NOx of the exhaust gas 18

20 Thank you!


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