HYDRATES INHIBITION 2

[Monagas]

Hi my friends

We are using EGlycol to prevent hydrates formation in the gas stream of a dew point control plant. Furthermore, we have an auxiliary methanol injection system in case of failure of the EGlycol injection.

So, could I operate the both injection systems at the same time in case of low ambient temperatures, that could cause freezing inside of the process equipments?

Do you think that the methanol could cause problems in the EGlycol regeneration system. (e.g distillation column & reboiler)

Thanks in advance

 

[dcasto]

The amount of hydrate control is a function of moles of inhibitor, methanol or EG. The menthanol will go out with the water in the EG reconcentrator. The conoco methal inhibitor process used in cryogenic systems (-160F), it used EG to wash the methanol out of the liquid hydrocarbons and then recovered the methanol by boiling it out of the EG. The recirculated both.

 

[bewdley]

As a designer of EG recovery systems, although for different applications. Methanol is not a problem in itself, it vents easily due to the difference in boiling point if compared to EG.
If operating under vacuum, methanol will be vented, presumably to a flare, after being compressed by a (presumably) liquid ring pump. The only troubles I have experienced are the irregularities in methanol feed to the system, resulting in irregularities in evaporation pressures - but this is easily solved.

 

[Monagas]

Ok My friends, thank you so much. it will be very helpful