What is the specific principle behind thermal high scores?
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In hydrorefining, the reaction effluent exits the reactor, undergoes heat exchange, and then enters the hot high-pressure section. The problem is that the pressure in this hot high-pressure section is similar to the pressure before it; unlike in the flashing process, how is it possible to separate hot high-pressure gas from hot high-pressure liquid? Is it because of the inner parts?
The temperature drops after heat exchange; generally, the feed temperature for hot fractions is controlled at 240–260. As a result, gas is released from the oil products, but the separation is not complete
In my opinion, it is more of an energy-saving design; without high heat values, the hydrogen gas after heat exchange, as well as the reaction products, must be cooled to below 45°C using high-pressure air cooling. Once the oil products enter the distillation unit, they need to be heated back to above 200°C, which increases the costs associated with fuel and electricity consumption
After the gas and liquid are mixed in the reactor, they pass through a heat exchanger to be cooled, and then both proceed to the high-pressure separator for gas-liquid separation. Meanwhile, some of the light oil, along with the gas phase, passes through another heat exchanger to be cooled before entering the low-pressure separator for further separation.