Issues with remote magnetic flap switches
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Our company produces polyether polyols; we currently have **small intermediate tanks and finished product tanks, which were designed to facilitate observation and save costs. All of them use remotely controlled top-mounted magnetic flip switches. A problem has been identified now: due to the low temperatures, the viscosity of the polyether is high, and as a result the liquid level does not change during feeding, or it changes by only one or half a meter before stopping. Let’s go check our instruments now; it will be fine once we do that. The pulleys inside are not stuck; I think it’s the viscous material that has stuck to the float inside the tank, increasing its weight. Originally, the float floated on the surface of the liquid, but now it remains suspended at a certain position on the surface, without changing as the liquid level does. Please, experts, help me analyze this situation and suggest any effective solutions. The density of PS polyether is 1000, and the density of that float is also set at 1000
Please, experts, help me come up with a better solution; I really feel inadequate
The density of PS polyether is 1000, and the density of that float is also set at 1000. When you start learning this, it’s basically not difficult
Make the density of the floating ball even lower! In short, making the liquid level a bit lower has no impact
““Just pull it now – it should work.” It’s likely due to insufficient magnetism, too large a distance between the magnetic flap and the cylinder, or an issue with the flexibility of the magnetic flap. Also, is the difference between the outer diameter of the float and the inner diameter of the cylinder too large?
Magnetic flip-type level gauges can replace glass or glass-tube level gauges for measuring the liquid level in pressurized or open containers. They not only provide on-site indication but also offer functions such as level alarm and remote signal transmission, enabling alarm and monitoring at a distance.
It can be redone; if there are issues with it,
Consider providing heat tracing for the magnetic flap float and the upper and lower ball valves. Prevent the increase in material viscosity due to low temperatures, which could cause sticking
Agree with the person above; the idea of adding steam tracing is quite good
After adding heating, the density of the medium inside the magnetic float differs from that in the tank; as a result, the measured values will have errors compared to the actual liquid level, due to this difference in density. Too high viscosity makes it unsuitable for magnetic flap switches. Another form should be used, such as ultrasound or radar. If the price seems too high, use a single-flange differential pressure transmitter with heating at the root; this will yield more accurate results. If that still doesn’t work, keep things as they are and pull it once a day.