Reasons for excessive temperature rise in methanol catalysts
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What are the reasons for excessive temperature rise in methanol catalysts, and how should it be handled when this occurs? I hope the seniors can provide an answer! ! ! Medium-pressure diol dimethyl process
Is it the temperature spike during heating reduction? Is it still the excessive temperature during the production process? Generally, cut the fresh gas, increase the circulation rate, activate double-line cooling, or vent it. The main thing is to clarify the situation.
If the catalyst temperature rises excessively during heating and reduction, the heat source should be shut off, the pressure in the steam drum should be reduced, the space velocity increased, a cooling line activated, and more water added to the steam drum along with increased blowdown. If the temperature rises during normal production, the possible causes could be an excessive oxygen content in the gas, too large a flow rate of fresh gas, too high a pressure in the drum, instrument errors; in the case of a two-tower synthesis plant, it could also be due to problems with the circulation water pump.
During normal operation, if the temperature rises abnormally, the fresh gas supply should be cut off immediately and nitrogen should be introduced for replacement, while paying attention to maintaining the liquid level in the drum.
In the process of producing lyylene oxide, cooling is generally used for regulation. The main reasons for overheating are either an insufficient amount of cooling gas, a high concentration of CO in the gas stream, a low circulation rate, or problems with the compressor. However, in many cases related to lyylene oxide production, there is no compressor at all; in such situations, the issue lies in inadequate regulation