Level gauge failure analysis
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The liquid level in the vaporization tower is inaccurate. The medium in the vaporization tower is a mixture of methanol and water, at a temperature of around 235 degrees. The liquid level is generally controlled at 42% by the central control system. After operating for some time, the on-site glass tube level gauges and remote transmission level meters become inaccurate, with significant errors. After calibrating the glass tube level gauge, it was found that the valve was clogged. By increasing the water-alcohol ratio in the process, the steam temperature also increased. But the liquid level never dropped and kept rising. How can we determine whether the remote level measurement system is faulty now? The remote transmitter level gauge is a double-flange level gauge
The tower contains a mixture of methanol and water; why do the valves get clogged? If the valves on the glass tube level gauge can get clogged, are there also valves at the double-flange connections? Are there impurities in the medium? If there are impurities, I think there’s a possibility of blockage or residue on the lower flange
During the maintenance of the gasification tower, the operating conditions of the equipment were not checked, and it was unclear whether there was anything detached inside the tower; valves were installed in front of the dual-valve flanges.
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