The main tower has high moisture content and high pressure at the top, resulting in reduced production capacity. How to deal with this?
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The main tower has high moisture content and high pressure at the top, resulting in reduced production capacity. How to deal with this?
There is a lot of paraffin; it is preliminarily assumed that the tray may be blocked, and two heat washes did not yield much effect.
Post-system thermal washing is one aspect; it’s also important to control the source of the problem. The issue arises from FT reactions taking place in the reactor, and these reactions are mainly caused by an inappropriate hydrogen-to-carbon ratio. If this ratio is too low, more paraffin is produced. By increasing the hydrogen-to-carbon ratio to 2.0 for the fresh gas and raising the reaction temperature, side reactions in the reactor decrease. Additionally, optimizing the distillation system can help increase the amount of fusel oil that can be recovered. It’s also possible to increase the amount of deionized water used in the expansion tank. I hope to get some financial support – I lost my main account and have just created a new one; I really need money. Thank you
Thank you for your support. At present, the effect of thermal washing is limited; the catalyst in the previous processing stage is severely aged, which prevents an increase in the production of crude methanol. Moreover, the capacity of the distillation tower cannot be increased, resulting in a bottleneck. Can chemical cleaning solve the problem of tray blockage?
What is the heat washing temperature? There is no problem with using heat washing with paraffin； Also, the pressure at the top of the tower is high; what about the pressure at the bottom of the tower? It’s fine if the pressure difference isn’t large ； The product has a high water content; it is necessary to check whether the heat exchanger is leaking and whether there are leaks in the desalinated water in the return tank ； What is the effect of reducing the load for a short period of time and increasing the reflux product quality?
The hot washing temperature at the tower top is above 100 degrees, and after reducing the yield, the moisture content decreases significantly. The main issue is the high pressure at the top of the tower, which is more than 38 Kp above the upper limit. Moreover, the ethanol outlet temperature, the methanol outlet temperature, and the top temperature of the tower are all about 1 to 2 degrees higher than before. Even after thermal washing, the pressure at the top of the tower remains high, with little effect achieved.
I think we could consider the heat exchange efficiency of the top exchanger, and also take into account the amount of steam required for the bottom reboiler