In order to improve the atmospheric environment and explore the emission reduction potential of in-dustries,this study selected key industries such as package printing,industrial coating,and rubber and plastic products in Zhengzhou as research objects.The current governance situations of Volatile Organic Compounds(VOCs)in 226 key enterprises were investigated,and their VOCs governance efficiency was analyzed.Fur-thermore,the emission reduction potential for VOCs was estimated in five treatment scenarios.The results indicated that source substitution of raw and auxiliary materials with VOCs content had not been completed in key industries,and end-of-pipe treatments mainly comprised ultraviolet(UV)photo oxidation+activated carbon adsorption,activated carbon adsorption+catalytic combustion,and regenerative thermal combustion.Regenerative thermal combustion and direct combustion had high governance efficiency,with the means over 85％.The inlet concentration of VOCs was the main factor affecting the governance efficiency.When catalytic combustion technology is used to treat exhaust gas with a concentration of 20-160 mg/m3,the higher the concentration,the better the treatment effect.Among the five emission reduction scenarios,the comprehen-sive scenario considering all stages exhibited the highest emission reduction potential,achieving a reduction rate of 62％.Regarding the emission reduction potential of individual governance stages,replacing high effi-ciency treatment facilities at the end-of-pipe stage had the strongest potential,achieving a reduction rate of 44％,followed by end-of-pipe maintenance(39％)and source substitution(32％).In summary,the govern-ance efficiency of VOCs in key industries in Zhengzhou is effectively enhanced by source substitution,process control,and end treatment.This study provides scientific and technological support for the management de-partments and enterprises in the precise treatment and emission reduction of VOCs.
关键词
VOCs/治理效率/减排潜力/包装印刷/工业涂装/橡胶及塑料制品
Key words
VOCs/governance efficiency/emission reduction potential/package printing/industrial coating/rubber and plastic products
维普
万方数据