Abstract:
For the capacity expansion and revamping of a 1.8×10
6 t/a Davy methanol production project of an energy company, a multilayer cross one-dimensional, quasi-homogeneous mathematical model was established for the adiabatic heat transfer of methanol radial reactor. The model was used in Aspen Plus to simulate the series-parallel coupling process of the dual radial reactor. We found that an increase in the area of the central pipe hole effectively reduced the pressure drop of the perforation at a large flow rate, and a decrease in the inlet temperature reduced the hot spot temperature but increased the circulating gas flow rate. Variation of the feed gas ratio substantially changed the connection mode of the reactor, and increased the methanol production of the 2# reactor. The optimum production conditions were obtained when the fresh gas ratio was 0.800 and the entry temperature was 235.0 ℃, leading to a production capacity enhancement of 130% with respect to the unoptimized process.