Formaldehyde generated by the iron-molybdenum method often appears at the beginning of operation – does the rupture disc explode?
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We are a manufacturer of polyoxymethylene, using iron-molybdenum-based raw materials for the production of formaldehyde. During my studies, I heard that burst discs would often fail at the beginning of operation, and the plants would shut down frequently; each such shutdown caused significant losses. I hope those with experience in using the iron-molybdenum method for formaldehyde can share their knowledge generously.
It’s not that scary actually; as long as it is designed in accordance with standard requirements and operated following strict procedures, safe production can generally be achieved. The key lies in the control of raw material concentration and the design of the equipment, etc.
In fact, the rupture of the burst disc is caused by an increase in pressure inside the reactor. The key lies in your methanol feed concentration and your online oxygen concentration; sometimes the oxygen analyzer is not calibrated accurately, which can easily lead to this problem. At the same time, towards the later stages of iron-molybdenum catalyst production, it becomes difficult to control the pressure inside the reactor. This kind of problem tends to occur easily~
Calculation of the design pressure for rupture discs in chemical process pressure vessels and an introduction to their types: http://bbs.hcbbs.com/thread-1633472-1-1.html (Source: Haichuan Network)
At the beginning of driving, vehicle jumps out of the vehicle easily, and at the later stage of catalyst use, the rupture disc tends to burst; there are many reasons for this due to numerous interlocks.
This kind of situation does not occur with mature manufacturing processes; which company’s process are you using?
The explosion-proof version basically emerges at the later stage of the catalyst process. Have any colleagues explored ways to control this situation so as to prevent or reduce explosions?