1. College of Energy and Mechanical Engineering, Shanghai University of Electric Power, Shanghai 201306, China; 2. School of Mechanical Engineering, Tongji University, Shanghai 200092, China; 3. Jiangnan Shipyard(Group) Co., ltd., Shanghai 201913, China
Abstract：The heat balance equation of Regenerative Thermal Oxidizer (RTO) was established according to actual operating condition of a painting workshop. The no-load and full-load operation data of RTO was calculated, and the relationship between furnace temperature and concentration of Volatile Organic Compounds (VOCs) was verified. On this basis, the influence of four key parameters of exhaust air volume, zeolite runner concentration ratio, heat exchanger heat utilization rate and VOCs concentration on natural gas consumption were discussed. The results show that the furnace temperature increased by about 21℃ for each 1000mg/Nm3 growth in the incoming VOCs concentration. The smaller exhaust air volume made the higher zeolite rotor concentration multiplier and heat exchanger thermal utilization rate, and thus resulted in higher VOCs concentration in the RTO. This results could reduce natural gas consumption. The heat balance equation was established in this paper, combined with the considerations in engineering application of RTO. When painting was being dryed, the minimum exhaust air volume of painting workshop was establed on the basis of 3 times/h. The concentration multiplier of zeolite rotor was set to 10~14times, and the heat exchanger with heat utilization rate above 0.7 was selected, which could significantly reduce the natural gas consumption, and ensuring the safe operation of RTO.
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