Optimization and Practice of Integrated Technology for Qualitative Resource Utilization and Efficient Treatment of VOCs in Coking Plant

The volatile organic compounds (VOCs) generated during the coking production process are complex in composition and fluctuate greatly in concentration. Moreover, the oxygen content of some gases varies significantly. Traditional single treatment methods have certain drawbacks and cannot achieve efficient and comprehensive treatment. This paper proposes a differential treatment process. The low-oxygen VOCs produced by tanks with better sealing are led to the negative pressure pipeline of the gas for resource utilization as supplementary fuel; the high-oxygen VOCs produced by tanks with poorer sealing are led to the regenerative thermal oxidation (RTO) system for combustion treatment. After implementing this process in a coking enterprise with an annual output of 1.3 million tons, the comprehensive removal rate of VOCs was ≥98%, reducing carbon emissions by 3200 tons, and the stability of the system operation was significantly improved. This technology provides a new path for efficient and low-carbon treatment of VOCs in the coking industry.