What factors determine the feed inlet temperature and the drum pressure in a methanol synthesis tower?
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What factors determine the feed inlet temperature and the drum pressure in a methanol synthesis tower? Is it based on the methanol yield? When determining the pressure of the secondary medium-pressure steam generated by the drum, was optimization of the entire utility system taken into account? Or should we only consider the yield of methanol?
Inlet temperature: It is primarily determined by the activation temperature of the catalyst, which is generally above 190 degrees. Factors that influence this temperature include the temperature at the outlet of the synthesis tower, the composition of the feed gas entering the tower, the circulation rate, and the area of the heat exchangers outside the tower. Drum pressure: This is mainly influenced by the activity of the catalyst during its initial, intermediate, and final stages, as well as by the structure of the synthesis tower, its heat transfer capacity, the composition of the feed gas, and the load applied to it. Generally, the pressure is controlled at around 230 degrees in the initial stage and around 260 degrees in the later stages.
Controlling the temperature of the synthesis tower means controlling the pressure in the drum. The pressure in the drum is primarily adjusted based on the temperature of the catalyst bed. In addition to the pressure in the drum, factors that affect the temperature of the catalyst bed include the composition of the fresh gas, the amount of material being circulated, the tower’s production capacity, and the load. The temperature control should be determined according to the conditions of use of the catalyst; it is generally lower in the initial stage and gradually increases over time
This post was last edited by superchenlei on 2010-4-12 01:37. 2# FEIJING: Thank you for your advice. What if, when determining the inlet temperature and drum pressure, we also take into account the optimization of the heat exchange network throughout the system as well as the optimization of the utility systems? Is it actionable? Is it necessary to conduct research?
3# gfz8887 Thank you for your advice. What if, when determining the inlet temperature and drum pressure, we also take into account the optimization of the entire system’s heat exchange network as well as the optimization of the utility systems? Is it actionable? Is it of research value?
The drum pressure for methanol synthesis varies significantly, ranging from 2 MPa in the initial stage to 4 MPa in later stages; generally, the steam generated by the drum is sent to steam networks operating at 1.3 or 1.6 MPa.
6# yzl79: The pressure in the drum determines the pressure of the by-product steam. Does the pressure of this by-product steam change after it enters the steam distribution network? Is it no longer the drum pressure?