The maintenance of the cooler is the key to ensure the normal operation of the equipment and extend its service life. The following are some key maintenance precautions:
1. Daily inspection
Appearance inspection: Before work every day or each shift, check the appearance of the cooler, including whether the shell has leakage, especially the tube sheet connection, inlet and outlet flanges, welds and other parts.
Temperature monitoring: Use tools such as infrared thermometers to measure the temperature of the inlet and outlet pipes of the cooler to ensure that the temperature is within the normal range.
Pressure observation: Check the pressure indicator instrument at the inlet and outlet of the cooler, record the pressure value, and observe whether the pressure is stable.
2. Regular maintenance
Cleaning work: Clean the shell of the cooler thoroughly, remove dust, oil and other impurities accumulated on the surface, avoid affecting heat dissipation and corroding the shell.
Cooling medium inspection and replacement: If the cooler uses water and other cooling media that are easily contaminated or scaled, it is necessary to regularly test its water quality, check the pH value, hardness, suspended matter content and other indicators, and decide whether water treatment or replacement of cooling media is required based on the test results.
Bolt tightening: Check the bolts at each connection point of the cooler, including the connection bolts between the tube sheet and the shell, the connection bolts of the inlet and outlet flanges, etc. Use a suitable torque wrench to tighten according to the specified torque requirements to prevent the bolts from loosening due to vibration during the operation of the equipment, causing leakage and other problems.
3. Annual maintenance
Internal inspection and cleaning: After shutdown, open the end cover of the cooler, pull out the tube bundle, and conduct a detailed inspection of the inner and outer surfaces of the tube bundle and the inner wall of the shell. Check whether the tube bundle has corrosion, wear, deformation, etc. For tube bundles with problems, you can decide whether to repair or replace them according to the degree of damage.
Instrument calibration: Calibrate the temperature instrument, pressure instrument, etc. equipped on the cooler to ensure the accuracy of their measured values.
Anti-corrosion treatment: Anti-corrosion treatment is performed on the outer shell and the visible metal surface inside the cooler. For the rusted parts of the outer shell, rust removal should be carried out first (grinding, sandblasting, etc. can be used), and then appropriate anti-corrosion paint should be applied; for the internal metal surface, anti-corrosion coating can be applied according to the actual situation to enhance the corrosion resistance of the equipment and extend its service life.
4. Spare parts management
Establish a complete spare parts inventory management system to reserve commonly used spare parts such as sealing gaskets, tube bundles, bolts, etc. Regularly count the number of spare parts to ensure that the spare parts are sufficient and of good quality. When equipment fails and needs to be replaced, spare parts can be provided in time to reduce equipment downtime.