Pre-hydrogenation pressure drop issue
Thread Content
What are the reasons for high pre-hydrogenation pressure drop? What measures should be taken?
First, you need to analyze what is causing the pressure drop Only by knowing the cause of the pressure drop can appropriate measures be taken
Properties of the raw materials, iron content, contents of S and Cl, water content, gel content, and solid particles
1. Insufficient hydrogen supply in the reactor for extended periods 2. High levels of dienes and styrene in the raw materials 3. Multiple pressure releases from the reactor 4. Introduction of free water 5. Poor filtration of the raw materials and blockage by foreign substances 6. Prolonged storage of raw materials leads to the formation of gums and polymers
It must be the raw materials that cause this issue; the situation on the 4th floor is more severe – basically, every certain period of time, the top layer of material needs to be removed from the first reactor
The differential pressure in the pre-hydrogenation reactor at our facility is rising rapidly; it’s probably due to an issue with the raw materials. Later, by drawing on information from other units, a protector was added before the pre-hydrogenation reactor. There are shut-off valves before and after the protector, as well as a bypass line. The protector is filled with a large amount of protective agent, supported by ceramic balls, along with a small amount of catalyst. Under normal circumstances, the raw material flows through the protector after heat exchange; if the protector gets clogged, it can be cleaned directly, and at that point the raw material oil will flow via a bypass line into the reactor.
What do the protective devices on the sixth floor look like? Could you share any photos or information about them?