What is the principle behind the high-temperature high-pressure process flow?
Thread Content
What is the principle behind the high-temperature high-pressure process flow?
This mainly aims to save energy and reduce consumption; the hot material is used directly as feed for subsequent distillation, which reduces heat loss. At the same time, it decreases the amount of material that enters the cold high-pressure section, thereby reducing the air cooling load
Is the hot high-pressure gas also used for circulating hydrogen, or is it cooled by air separately?
On the one hand, energy savings and reduced consumption are considered, with efforts to recover heat as much as possible; on the other hand, expanded flash evaporation of the hydrogenation oil is used to evaporate the hydrogen sulfide dissolved in the oil, thereby reducing the workload for subsequent stripping processes.
The hot high-pressure gas is cooled by air cooling before entering the cold high-pressure section, where another gas-liquid separation takes place. After desulfurization and dehydration, the gas from the cold high-pressure section becomes recycled hydrogen
Are cold high-boiling-point oils fractionated together with hot high-boiling-point oils?
The statement is inaccurate. The hot high-boiling fraction oil enters the hot low-boiling fraction, where further separation takes place; this can be considered as a single flash process, with the hot low-boiling fraction oil then going on to distillation. Similarly, cold high-boiling-point oil is separated from cold low-boiling-point oil, and the cold low-boiling-point oil generally enters the distillation unit after heat exchange