Can a side-mounted guided-wave radar be used for the medium-pressure drum level measurement?
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Dear teachers, the level gauges currently used for medium-pressure steam packaging are composed of double-chamber balanced containers and differential pressure transmitters, and they are not very effective. A guided-wave radar is installed on the upper side of the 4-bar steam drum, and it works very well. I was wondering if a guided-wave radar level gauge can also be installed on the 20-bar medium-pressure steam drum (with a water temperature of 220°C) Which manufacturer’s products are more durable? Has anyone used it this way?
It should be possible. The design pressure of the steam drum in our project is PN40, and an external guided-wave radar is also used. E+H’s.
Guided wave radar can be used; those from E+H, as mentioned above, or well-known brands such as Siemens and Emerson are all excellent choices. But why was the original differential pressure not effective? Besides, a boiler at 20 bar can only be considered low-pressure, right?~
The two-chamber balance vessel is very difficult to adjust. During the testing of such vessels in a previous project, the readings from the two balance vessels did not match those from the on-site level gauges and radars. Several attempts were made, and different teams were assigned to carry out the adjustments; eventually, a technician from CNPC was brought in who managed to fix the issue. However, once the plant was shut down and restarted, the problem appeared again. . . Adjusted it again. . It’s really hard to adjust. Probably the only advantage is that the price is relatively cheap.
As long as it doesn’t leak, it should be easy to adjust. It’s simply that the density of water needs to be compensated for at high temperatures
It’s possible that the calibration of the instruments during construction was not done properly. After the furnace was shut down, attempts were made to adjust them by filling them with water, but this didn’t work. During the trial runs, adjustments while the system was in operation also failed. In any case, it took a long time to get things sorted out, and while the system was running, the readings from the two dual-chamber balance containers differed from each other. . .