Field test analysis of a novel continuous running dual-channel condensation gasoline vapor recovery system

Abstract

In China, the emission reduction and control of volatile organic compounds (VOCs) have become the focus of air pollution prevention and control. Condensation method was applied for gasoline vapor recovery due to its simple recycling principle, mature key technologies, and high safety. However, frost on the surface of the heat exchanger caused unstable operation of the recovery system. A novel continuous running dual-channel gasoline vapor recovery system was presented and tested in this paper. With dual channels of A and B switching cooling and defrosting conditions, the system could achieve recovering gasoline vapor while defrosting. The typical gasoline vapor was selected for the analysis of the condensation separation process of the system, and the condensation temperatures of the three stages were designed at 0, −25, and −75 °C, respectively. The temperature and pressure difference of the gasoline vapor were investigated during the condensation process. By the field measurement, the gasoline vapor could be cooled to −75 °C, and the ability of the system to operate stably and continuously was proven.