The gas flow meter has high resistance
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The resistance of the gas flow meter for coke oven gas with a diameter of 1400 mm and a V-shaped internal cone shape reaches 6 kPa; what should be done to address this issue or what methods can be used for cleaning it?
Is the pressure tap blocked? Will nitrogen back-purging work?
Is it the high design resistance of the flow meter, or the high resistance during use? After using it for a while and experiencing high resistance, it is necessary to clean the pipeline where the flow meter is located or clean the flow meter itself.
If the differential pressure you measure is the value shown by the flow transmitter, then it’s definitely the V-cone that is blocked. The solution is to disconnect the pressure tapping tubes of the transmitter and introduce steam inside; however, this requires making a hole in the pipeline somewhere to allow water to drain out, and the valves before and after the flow meter must be closed. Another permanent solution is to install steam tracing pipes on the outer surface of the flow meter along with insulation, or to provide steam tracing and insulation on the pipeline ahead of the flow meter, thereby maintaining the temperature of the gas and preventing dirt from solidifying
After some time, the resistance increased; there are no valves at either end, so production cannot be stopped, with a gas flow rate of 70,000 cubic meters per hour. What method can be used to clean it?
You jerk, come up with a solution already; you just know how to talk nonsense all day long
If production cannot be stopped, the only option is to use steam coils for heating outside the flow meter
For coke oven gas, V-cone flow meters must be equipped with a purging device; otherwise, blockages will occur. You can try our plug-in thermal mass flow meter, with a Teflon coating for anti-adhesion.