【Q&A Question 171】2016.10.08
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【Q&A Question 171】October 08, 2016: How to verify the level of the reboiler top reflux drum in conjunction with the internal operator? The answer key will be available after responding; scoring is based on answering the key points. Answer: When adjusting the level of the reflux tank at the top of the stripping tower, both indoors and outdoors, it is necessary to check whether the height of the glass plate and that of the instrument wiring are consistent; if they are not, the level should be reported based on the height of the instrument wiring, as indicated by the operator ； If a false boundary position is suspected, the internal control should be used to move the boundary position to check whether the on-site boundary moves in sync ； If glass plate blockage is suspected or if there are other issues requiring the glass plates to be emptied, they should be arranged closely together; if direct drainage is necessary, make sure to wear a self-contained breathing apparatus.
Cut off the level gauge, open the vent at the bottom of the gauge; if the level drops, contact the operator for verification
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Compare the on-site display value divided by the on-site measurement range with the indoor remote transmission value!
Clean the glass plate at the site; rinse it using the upper and lower control valves to check for any blockages. If there are no blockages, proceed with further use. Then adjust the positions separately for the outer tank and the inner tank, and the operator shall make a judgment by comparing the position of the glass plate with the position transmitted from the inner tank
It is necessary to check whether the height of the glass panel is consistent with that of the instrument’s lead wires; if not, the value should be based on the instrument’s lead wires when reporting to the operator； If it is suspected to be a fake boundary position, the internal control should be used to activate the boundary position to check whether the on-site boundary position moves in sync ； When it is suspected that the glass plate is blocked or there are other issues requiring it to be emptied, they should be arranged closely together; if direct drainage is necessary, make sure to wear a self-contained breathing apparatus.
Remote and on-site level gauges. glass plate
1. The operator should switch the position controller to manual mode； 2. Observe the glass plate level gauge and the readings of the primary instruments on-site to check if they match ； 3. Contact the operator to increase or decrease the discharge volume of acidic water, thereby artificially altering the level ； 4. Observe the changes in the glass plate level gauge and the primary meter. 5. In case of failure, contact the instrument technician for handling.