Problems with heat exchange temperature and flow rate before and after crude oil removal
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The crude oil in our company's atmospheric and vacuum unit has four heat exchange channels before and after dehydration. The heat exchange processes are different. If the flow is balanced, the temperature cannot be balanced. If the temperature is balanced, the flow is unbalanced. As for which flow or temperature should be more balanced, everyone has different opinions. What do you think? reason?
This is indeed a contradictory question. The purpose of our heat exchange is to fully recover waste heat to reduce energy consumption. Therefore, as long as the waste heat is recovered to the maximum extent and safe and smooth operation is ensured, temperature balance must be given priority while flow balance must be taken into consideration.
Personally, I think the temperature should be the main factor. The temperature difference between each branch should not be too large. On the premise of ensuring the temperature, the flow rate should be considered. Since the heat exchange processes of each branch are different, the flow rate should also take into account the conditions of each heat source.
Balance the flow rate while ensuring the temperature, because the temperature requirement range of electric desalting cannot change too much.
Temperature and flow cannot be balanced. Should you consider revamping the heat exchange process during overhaul to try to achieve a balanced temperature and flow rate for each heat exchange path?
I agree with what the people above said. Temperature directly affects the desalination effect, so temperature is still the main factor. Secondly, adjust the flow rate. You can also adjust the temperature by adjusting the amount of heat source. Try to balance each channel.
The temperature must be controlled well. The impact of temperature on the entire system should be focused on. Unbalanced flow branches are not critical, but as long as safe values are ensured