废有机溶剂再生利用企业输转过程VOCs排放模型的建立

为提出废有机溶剂再生利用过程中可挥发性有机物(VOCs)减排的合理化建议，通过建立3种废有机溶剂再生利用企业的VOCs排放模型，估算了18种常见废有机溶剂的排放系数。结果表明：排放系数的顺序为小型企业>中型企业>大型企业；小型再生利用企业的VOCs排放系数较高，为9.04~12.59 g·kg⁻¹, 中型再生利用企业的VOCs排放系数为8.89~10.69 g·kg⁻¹，大型再生利用企业的VOCs排放系数为0.09~3.04 g·kg⁻¹。中、小型企业在装料管残留的环节排放系数最高；大型企业在装料过程排放系数最高；温度对VOCs的排放有影响，对大型企业影响较大。综合上述结果，建议小型企业采用密封管道输送物料且在进料与装料口加装VOCs吸收装置，大型企业的操作环境以及储罐保持在较低温度处。上述研究结果可以为VOCs排放控制提供参考。

Establishment of VOCs emission model during the transfer process of waste organic solvent recycling enterprise

In order to put forward a reasonable proposal for the reduction of volatile organic compounds (VOCs) in the recycling and utilization process of waste organic solvents, the VOCs emission models were established to estimate the emission coefficients of 18 types of common waste organic solvents for three types of waste organic solvents recycling and utilization enterprises. The results show that the emission coefficients were ordered as small enterprises> medium enterprises> large enterprises. The VOCs emission coefficients of small enterprises were high, ranging from 9.04 g·kg−1 to 12.59 g·kg−1. The VOCs emission coefficients of medium enterprises were 8.89~10.69 g·kg−1, and the VOCs emission coefficient of large enterprises were 0.09~3.04 g·kg−1. Small and medium enterprises had the highest emission coefficients in the out-tube residual liquid. Large enterprises had the highest emission coefficients in the charging process. Temperature had the effects on VOCs emissions, and had the greatest effect on large enterprises. It is suggested that small enterprises use sealed pipelines to transport materials and install VOCs absorption devices at the feeding and charging ports. The operating place and the storage tanks in large enterprises should be kept in low temperature. The research results can provide reference for the control of VOCs emissions.