Why does reducing the temperature of the cold high-pressure fraction in diesel hydrorefining increase the pressure in the reaction system? Solve
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Or in other words, increasing the system pressure and reducing the temperature of the cold high-pressure fraction – what is the principle behind this measure? The maximum temperature of cold high-score mode does not exceed 50 degrees Celsius
What are these measures for? Reducing the cold high temperature can increase system pressure?
In my understanding, can the load on the recirculating compressor be increased? But it is limited by temperature – that is, a high inlet temperature leads to a high exhaust temperature, which in turn reduces the work done by the recirculating machine However, the greater the circulation rate, the lower the reaction temperature and the less profound the reaction depth; under unchanged other conditions, can increasing pressure compensate for this effect? I don’t understand your question at all; this is my personal opinion
Less hydrogen is dissolved in the generated oil
Personal understanding: The method to reduce the temperature of the cold high-pressure fraction is to increase heat extraction through high-efficiency heat exchangers and air cooling; this lowers the temperature of the reaction effluent, increases the proportion of the liquid phase, and raises the pressure drop from the reactor to the high-pressure fraction, thereby increasing the reactor pressure.
I understand it the same way; I didn’t understand it either when I saw it on the forum a couple of days ago
The separation efficiency at low high pressures is improved; the gas phase (hydrogen) can be separated to the greatest extent possible, while preventing the phenomenon of liquid carried in the recycled hydrogen.
I don’t quite understand it, but by lowering the temperature of the cold high-pressure section, the system pressure decreases, hydrogen consumption increases, the purity of the circulating gas rises, and the degree of reaction indeed increases, along with an increase in the temperature of the bed layer. A fantasy that often came to mind during the heavy rains a few days ago.
Lowering the temperature of the cold high-pressure section reduces the volume of the gas; consequently, the system pressure decreases. It is necessary to increase the system pressure. The reduction in the temperature of the cold high-pressure section is mainly due to increased heat exchange, an rise in the bed temperature, and a greater degree of reaction.