Regarding the temperature of naphtha after air cooling in the naphtha distillation tower
Thread Content
What temperature should this be controlled at? The design is 50. Is it okay to keep it around 35 degrees? It’s too low; what impact does it have on the equipment and the manufacturing process? (Hydrocracking process ())
Keeping it at 35 might be too low; after all, it is still necessary to control the initial boiling point. If the temperature after cooling is too low, energy consumption will be high, but it should have little impact on the equipment.
The general principle for controlling the temperature of light oils after cooling is to ensure that they do not evaporate, thereby facilitating storage. Therefore, it is generally advisable to keep the design temperature within 40–50°C. Of course, it’s not harmful to keep the temperature lower, but factors such as energy consumption need to be taken into account, so it shouldn’t be set too low either.
The general principle for controlling the temperature of light oils after cooling is to ensure that they do not evaporate, thereby facilitating storage. In summer, it is appropriate to keep the temperature between 36 and 42°C, while in winter it should be maintained between 45°C and 52°C℃
It’s too low to achieve easily; once the air-cooling fan stops working, it can easily lead to tower flooding.
The temperature after air cooling is primarily a matter of economics; to reach 35 degrees may be possible in northern regions during winter, but it might be difficult to achieve this using methods such as wet air cooling in southern regions. The equipment investment and operating costs are high, making it uneconomical.
After air cooling in the naphtha distillation tower, the temperature of the naphtha should be controlled at around 50 degrees. Water cooling is generally installed after air cooling; if the temperature is too low, the water cooler will not be able to function properly, which affects energy savings and cost reduction.