What is the maximum temperature design for the filter in the cracking unit?
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I would like to ask the experts: What is the design temperature for the backwash filter used for the feedstock in hydrocracking units, and why is it designed this way? Our design temperature is around 150 degrees.
Different process routes result in different parameters, so it cannot be generalized
The process for our company’s Jiaqing cracking unit is as follows: the crude oil enters the raw material buffer tank in the storage area, from where it is pumped by a raw material pump to increase its pressure. After that, it passes through two heat exchangers for heat exchange, and then enters the backwash filter. The temperature of the oil entering the filter is around 110 degrees; isn’t a design temperature of 150 degrees better?
The temperature-related constraints on filter design are not very severe; the main limitation is the temperature at the inlet of the high-pressure feed pump, as too high a temperature can lead to pumping problems
It is generally designed around 150°C; too high a temperature poses a risk when entering the buffer tank, and it also makes it easy for the pump to experience vacuum conditions.
Ours is around 140 degrees. . . The temperature cannot be too high. . .
Generally, the hot feed temperature is taken into consideration; however, your design temperature is quite low!
The purpose of designing filters is to prevent magazines from entering the reactor, causing blockages in the heat exchangers and leading to scaling in the reactor. However, it is your company that determines the temperature settings, based on your raw materials or your requirements. Moreover, the temperature isn’t fixed; it is also influenced by the material used.
We have a set of high-pressure hydrogenation equipment: the feedstock first passes through a filter, then enters a heat exchanger; after heat exchange, it goes into a buffer tank. The temperature before entering the filter is 150 degrees Celsius, and it rises to 170 degrees Celsius after heat exchange. Since it is reduced three-line wax oil, there are no excessive light components that could cause pumping effects.