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1. Common Problems in Alcohol Equipment Debugging
Common problems in alcohol equipment debugging can be divided into four categories: pipeline sealing, measurement accuracy, temperature control matching, and explosion-proof compliance. The core solution logic is to first complete the no-load test machine to troubleshoot basic faults, and then verify process parameters with materials. All operations must comply with safety regulations for flammable and explosive places.
1. Pipeline sealing problems and solutions (1) Static leakage 1 Leakage of flanges and threaded joints: often caused by impurities adhering to the sealing surface, aging gaskets, or uneven tightening torque. After stopping the machine to release pressure, clean the burrs and attachments on the sealing surface, replace the PTFE or nitrile rubber gasket suitable for alcohol medium, evenly tighten the bolts in a symmetrical order, and hold the pressure for 15 minutes without any pressure drop to determine qualification
2. Weld seam leakage: mostly caused by welding pores or incomplete penetration. After stopping the machine, polish and repair the welding, and conduct a pressure test again. The test medium is nitrogen or compressed air (oxygen is strictly prohibited), and the test pressure is 1.05 times the design pressure. （2） Dynamic leakage 1 Leakage of pump shaft and valve packing box: It is mostly caused by wear of the packing or excessive clearance between the shaft seals. Replace the appropriate packing or mechanical seal, adjust the shaft seal clamping force until there is no continuous dripping.
2. Centrifugal pump does not load: mostly due to leakage in the inlet pipeline or incomplete pump filling and exhaust. Check the
2. Measurement accuracy issues and solutions: (1) Flow meter reading deviation: There are differences in the dielectric constant and viscosity of alcohol medium compared to the calibration medium (mostly water), and the electromagnetic flow meter needs to recalibrate the coefficient;
; The vortex flowmeter needs to clean the wine stains attached to the sensor, empty the residual bubbles in the pipeline, and calibrate the parameters. （2） Abnormal tank liquid level display: The radar level gauge needs to avoid eddy current interference from the mixer and feed inlet, and the ultrasonic level gauge needs to adjust the emission angle to avoid misjudgment caused by tank wall reflection. The condensate on the probe should be cleaned regularly. Three locust fibers, temperature control and distillation problems and solutions (1) Distillation tower temperature deviation from set value 1 High tower top temperature: mostly due to low reflux ratio, tray blockage, or excessive steam intake. It is necessary to increase the reflux rate, clean the tray blockage, and reduce the opening of the steam regulating valve. 2. Low tower top temperature: mostly due to high reflux ratio, insufficient steam intake, or high vacuum degree. It is necessary to reduce the reflux rate, increase the steam pressure, and adjust the vacuum system parameters. （2） Insufficient heat transfer efficiency of the heater: Check if there is scaling on the outer wall of the heating tube and clean the heat exchange tube with citric acid solution; Check if the steam trap is blocked and replace the faulty trap.IV. Explosion proof safety issues and solut
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