Will the high ammonia content in the low-temperature methanol washing inlet increase the pressure difference in the washing tower?
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Will the high ammonia content in the low-temperature methanol washing inlet increase the pressure difference in the washing tower?
The solubility of ammonia in methanol is higher than acidic gases such as CO2, H2S, and COS. It mainly accumulates in the methanol circulation system. Over time, ammonia salts will be formed in the relevant ammonia coolers and block the heat exchanger. Generally, the inlet is controlled below 1ppmV. No matter how high the energy is, I don’t think it will cause changes in the tower pressure difference!
It should be accumulated over a long period of time, but what the poster should consider is that the density of methanol in the scrubber has changed. However, it should not be
CO2 and ammonia will form ammonium bicarbonate. The viscosity of ammonium bicarbonate is high and will stick to the overflow weir of the tower, increasing the pressure difference of the tower.
Although they are said to be highly viscous, their proportion in the solution is quite small.
This should not happen. Ammonium bicarbonate will not be formed in the methanol solution.
I think so. Ammonia forms ammonium sulfide and ammonium carbonate in circulating methanol, which makes it easy to get dirty and increases the pressure difference in the scrubber.