Methanol Daily Question 090923001
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Starting from September 23, the methanol section will launch a daily question activity; rewards will be given for good answers, and participation awards will be offered to all those who take part. Everyone is welcome to join actively – participation guarantees rewards! What are the common types of methanol synthesis reactors used in the world today? Which one are you using? What are the advantages and disadvantages? Note: 1. Try to have your own opinions; only by having your own views can you get a high score (based on experience). 2. Do not plagiarize, otherwise the post will be deleted
There are roughly two types of Lurgi synthesis towers and ICI cold-stirred synthesis towers; we use the Lurgi synthesis tower. Features: Excellent process performance, suitable for the characteristics of methanol catalysts; it fully utilizes the catalytic activity. The catalyst can be safely heated and reduced, retains good activity after reduction, achieves high synthesis rates, requires less raw material gas per ton of alcohol produced, and yields products of high quality with few impurities ； The airflow and temperature within the reactor are uniform, which prevents the catalyst from overheating, becoming inactive, or breaking down ； Simple and reliable structure, good thermal expansion compensation, easy for loading/unloading, maintenance, and catalyst replacement ； Low tower pressure drop, resulting in low power consumption for the compressor and circulation pumps ； Heat recovery from the reaction is good, resulting in low total energy consumption per ton of alcohol.
I am using a shell-and-tube reactor here; its advantages include a high conversion rate of the feed gas, as well as the ability to generate medium-pressure steam, which can then be cooled and depressurized to become low-pressure steam.
I know there are types with uniform temperature and shell-and-tube types; what we use here is a shell-and-tube synthesis tower, which can effectively recover waste heat and generate medium-pressure steam at 2.5 Mpa as a by-product
Reference answer: 1) ICI multi-stage inter-stage quench methanol reactor. 2) Luchi tube cold-type synthesis tower. 3) Mitsubishi gas-cooled quench type synthesis tower (four-stage quench tower). 4) The shell-and-tube-cooled-tube composite synthesis tower (double-tube reactor) jointly developed by Mitsubishi Heavy Industries and Gas. 5) TOPSOE Topsoe radial reactor. 6) The MRF-Z type reactor from Toyo. 7) Axial radial reactor of Casale. 8) Linda isothermal coil reactor (isothermal water-cooled synthesis tower).