Problems with producing methanol process gas via low-temperature methanol wash?
Thread Content
Let’s discuss this~ The carbon dioxide content in the methanol synthesis gas produced by low-temperature methanol washing is 2.5%, which can effectively suppress the reverse reactions during synthesis as well as help reduce temperature. I would like to ask those with more experience: how can we ensure such a low level of carbon dioxide content in the process of low-temperature methanol washing? What kind of parameters need to be paid attention to?
It can be adjusted by regulating the amount of methanol circulating in the carbon dioxide main washing section, but such adjustments can only be made in small amounts!
An adjustment circuit is usually installed in the CO2 washing section, and under normal circumstances this circuit is sufficient to ensure normal production； Additionally, we can also adjust the methanol temperature in the CO2 absorption section by regulating the load of the inter-stage cooler ； We can also adjust the temperature of the circulating lean methanol to control the CO2 concentration!
If the above methods still do not meet the requirements, process gas can be taken from a certain tray in the absorption tower to carry out gas distribution.
Hehe, how is the boss taking gas from the tray to mix it up! I’ve heard of taking gas from CO2 pipelines for replenishment, but I’ve never heard of taking gas from tray plates for that purpose! :P
1. Adjust the methanol absorption circulation rate under high load conditions； 2. At low load, regulation can be achieved by adding a bypass to the carbon dioxide absorption section of the absorption tower