Technologies on Air pollution Control and Emission Reduction

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. Contents 1.Background 2. Key technologies areas 2.1 Dust removal 2.2 DeSOx 2.3 DeNOx 2.4 VOCs Treatment 2.5 Vehicle Exhaust Emission Control 1

3. 1. Background 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) 2

4. 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. 2.1 Dust removal • 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 • 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 Dust removal technologies 4

6. 22.1.1 Low temperature electric dust removal technology 5

7. 2.1.2 Moving electrode type electrostatic precipitation 6

8. 2.1.3 Wet electric dust removal technology 7

9. 2.1.4 Electrostatic-fabric Integrated dust removal technology 8

10. 2.1.5 Electric agglomeration 9

11. 2.1.6 High frequency power supply for electrostatic precipitator 10

12. 2.1.7 High-end materials for bag filter 11

13. 2.2 DeSOx At present, China’s thermal power plant air pollutant emission standards is the world’s most stringent, was implemented in 2012，dust、SO2、Nox emission limits were 30mg/m3、100mg/m3、100mg/m3 Improvement of limestone - gypsum method Power plant Resource utilization Iron and steel sintering machine Circulating fluidized bed method, ammonia method, limestone - gypsum method, active coke adsorption method De SOx Large quantity in different areas，consume 1/3 of total coal consumption annually Industrial boiler Chemical Industry 12

14. 2.2.1 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%, SO2 emission concentrations of less than 50mg/m3) etc. 13

15. 2.2.2 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. 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 SCR/SNCR/(SNCR+SCR) Power plant DeNOx LNB+SNCR Cement SCR/SNCR/Ozonation Industrial boiler 15

17. 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） • VOCs containing organic halogen elements → non incineration technology • Catering Industry→promote fume exhausting devices with oil mist recycling 16

18. 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. 2.5 Vehicle Exhaust Emission Control • Technologies for diesel exhaust： • Internal combustion technology /EGR+ SCR/DPF • DOC+DPF/POC+SCR DPF Capturing more than 95% of the particles in the exhaust gas , strong ability of capturing PM2.5, the emission concentration is lower than 0.25 mg/L 18

20. Thank you!