Disassemble the flowmeter

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1. How to solve the malfunction of activated carbon tetrachloride flowmeter?

The malfunction of activated carbon tetrachloride flowmeter needs to be safely isolated first, and then handled step by step according to the "gas path inspection instrument calibration hardware troubleshooting" process. The entire process needs to be operated by personnel with hazardous chemical operation qualifications.

1. Pre safety isolation (1) Cut off the medium path.

Close the manual shut-off valves before and after the flowmeter, switch the bypass valve to allow the material to bypass the flowmeter, and avoid the interruption of supply to the activated carbon adsorption tower; 2. Turn on the forced exhaust system in the work area to ventilate and replace residual carbon tetrachloride. The workers need to wear self-priming filter anti sales anti early toxic masks (half masks), solvent resistant rubber gloves, and anti-static work clothes.

II. Troubleshooting and Disposal (1) Troubleshooting of abnormal flow display (no data, numerical deviation) 1 Power supply inspection: Confirm that the wiring terminals of the flowmeter are not loose or short circuited. For DC power supply types, check the rated 24V DC input voltage to avoid measurement failure caused by undervoltage; 2. Air path filtration inspection: Disassemble the Y-shaped filter at the inlet of the flowmeter, clean the attached activated carbon powder and condensed impurities of carbon tetrachloride, clean with anhydrous ethanol, dry and reinstall to avoid blockage and flow restriction; 3. Zero point calibration: Blow the flowmeter chamber with inert gas (nitrogen), evacuate residual carbon tetrachloride, and calibrate the instrument zero point in a no f

low state; 4. Sensor cleaning: If the probe of the thermal/vortex flowmeter is attached with residual media, gently clean it with a dust-free soft brush. Do not use strong solvents such as acetone to wipe the coated probe. （2） Hardware troubleshooting 1 Communication abnormality: If there is a Hart/Modbus communication error, check if the signal line is wired in the same slot as the power cable. Install a signal shielding layer and keep it away from the frequency conversion equipment to eliminate electromagnetic interference; 2. Mechanical jamming: When the rotor of the rotor flowmeter is jammed, disassemble the chamber to clean the impurities attached to the rotor and chamber, check the wear of the bearings, and replace the bearings of the same model if the wear exceeds 0.1mm; 3. Blockage of differential pressure pipeline: The differential pressure flowmeter needs to blow the pressure hole and pipeline to avoid carbon tetrachloride crystallization or activated carbon particles blocking the pressure channel, which may cause distortion of the differential pressure signal.

III. Application and Ledger Record 1 After the maintenance is completed, blow the flowmeter and front and rear pipelines with nitrogen to replace the residual carbon tetrachloride vapor; 2. Close the bypass valve, slowly open the front and rear shut-off valves, gradually increase the medium flow rate, and observe for 30 minutes to confirm that the flow display is stable and there is no medium leakage; 3. Record the fault symptoms, troubleshooting steps, and replacement of components (if any), and include them in the monthly equipment inspection ledger.

2. How to disassemble the turbine of the intelligent turbine flowmeter

The turbin

1. How to solve the malfunction of activated carbon tetrachloride flowmeter?

2. How to disassemble the turbine of the intelligent turbine flowmeter

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