重点工业涂装行业VOCs减排路径与潜力评估

工业涂装行业是挥发性有机化合物（VOCs）综合治理的重点行业之一，涉及行业广，排放环节多，排放量大.确定不同行业的排放特点、治理现状与减排潜力是制定差异化的防治技术路线的基础.本文根据工业涂装行业排放占比，选取家具、汽车整车、汽车零部件、集装箱、机械制造、船舶、钢结构等行业开展源头替代、涂装工艺和设备、无组织排放收集以及末端治理等环节VOCs减排研究，分行业归纳总结VOCs排放特征，梳理VOCs控制技术在各行业的应用情况，评估各行业VOCs全过程控制整体水平，识别工业涂装VOCs控制的薄弱环节，计算不同减排路径下各行业的减排潜力.结果表明：(1)工业涂装行业普遍存在低VOCs含量涂料替代不足、自动化涂装方式占比低、无组织收集率偏低以及高端末端治理设施覆盖率偏低等问题，实施工业涂装行业全过程控制具有较大的减排潜力.(2)不同工业涂装行业减排重点应有所差别，木质家具、船舶和钢结构的VOCs减排潜力主要为源头替代及工艺改进，其减排潜力分别占本行业总减排潜力的80.3%、75.5%和68.2%，而汽车制造、集装箱、机械制造行业的重点减排环节以无组织收集和末端治理为主，该环节减排潜力分别占本行业...

Assessment of VOCs Emission Reduction Path and Potential of Industrial Coating

Industrial coating is one of the main sources of VOCs emissions, involving a number of emission processes in a wide range of industrial sectors. Analysis of the emission characteristics, treatment status and emission reduction potential of different industries is the basis for formulating differentiated control technical routes. According to the contribution to the total VOCs emission, seven industrial sectors, including furniture manufacture, vehicles, automobile parts, containers, machinery, ships and steel structures, were selected to carry out the research on VOCs emission reduction due to source substitution, coating process and equipment improvement, fugitive emission collection and end treatment. VOCs emission characteristics and the application of VOCs control techniques in various key industrial coating sectors were summarized, the overall level of VOCs control in the whole process of different industrial coating sectors was evaluated, and the weak links of VOCs control were identified. The emission reduction potential of various industries under different emission reduction paths was estimated. The results show that: (1) There are many problems in the industrial coating sectors, such as insufficient substitution of low VOCs content coatings, low penetration of automatic coating methods, inefficient collection of fugitive emission, and low coverage of high-end terminal treatment facilities. Implementing the whole process control in the industrial coating industry has great emission reduction potential. (2) The emission reduction measures in different industrial coating sectors should be differentiated: in wood furniture, ships, steel structure and other coating sectors, the main emission reduction measures are source substitution and process improvement. The emission reduction potential accounts for 80.3%, 75.5% and 68.2% of the total emission reduction potential of the industries, respectively. The key emission reduction measures in automobile manufacturing, container and construction machinery manufacturing industries are unorganized collection and terminal treatment emission control, and the emission reduction potential accounts for 80.3%, 61.5% and 58.6%, respectively. There is great VOCs emission reduction potential in coating industries. According to the characteristics of the sectors, different industries should carry out the whole process control from the aspects of source substitution, improving automation, enhancing fugitive emission collection efficiency, and selecting suitable end-of-pipe treatment technologies.