How Is Routine Maintenance Conducted for Heat Exchangers?
The heat exchanger's operational cycle must align with the production device's production cycle to ensure normal operation and meet production requirements. Regular inspection, supervision, and daily maintenance and repairs are essential.
Ensuring stable pressure is crucial, and overpressure operation is strictly prohibited. Leakages, often occurring during line sweeping start-ups and shutdowns, particularly in the floating head, require careful attention. When repairing, checking the pressure test from the pipe side after opening the outer closure head of the floating head is necessary. Tightening bolts may be needed due to plastic deformation caused by long-term heating, and steam pressure testing can be effective.
Most heat exchanger failures stem from tube issues, with corroded tubes needing timely replacement. For challenging replacements, blocking damaged tube ends with pipe plugs is an alternative. Scale-prone heat exchangers should be promptly cleaned to maintain optimal heat transfer efficiency.
1. During steam purging of the system installation, minimize purging of coated cold exchange equipment. If unavoidable, strictly control purge temperature below 200 degrees Celsius to prevent coating damage.
2. When starting and stopping the device, gradually heat and cool the heat exchanger to prevent excessive pressure differences and thermal shock. Follow "heat first, then cool" during shutdown and "cool first, then heat" during startup.
3. Before starting, ensure smooth operation of the threaded locking ring heat exchanger system, preventing overpressure on one side of the tube sheet.
4. Carefully check heat exchange equipment's operating parameters, prohibiting over-temperature and over-pressure. For designs with differential pressure, adhere to specified differentials during operation.
5. Operators must strictly follow safety regulations, conducting regular patrols on heat exchange equipment, checking foundation support stability, and inspecting for equipment leakage.
6. Frequently check medium temperature and pressure drop in the pipe and tube pass to analyze heat exchanger leakage and scaling. If pressure drop increases and heat transfer coefficient decreases, choose an effective cleaning method based on medium structure and heat exchanger design.
7. Regularly check for heat exchanger vibration.
8. During operation, strictly control the temperature of cold-swappable equipment with anti-corrosion coating to prevent coating damage.
9. Ensure the insulation layer remains intact.
Ensuring stable pressure is crucial, and overpressure operation is strictly prohibited. Leakages, often occurring during line sweeping start-ups and shutdowns, particularly in the floating head, require careful attention. When repairing, checking the pressure test from the pipe side after opening the outer closure head of the floating head is necessary. Tightening bolts may be needed due to plastic deformation caused by long-term heating, and steam pressure testing can be effective.
Most heat exchanger failures stem from tube issues, with corroded tubes needing timely replacement. For challenging replacements, blocking damaged tube ends with pipe plugs is an alternative. Scale-prone heat exchangers should be promptly cleaned to maintain optimal heat transfer efficiency.
1. During steam purging of the system installation, minimize purging of coated cold exchange equipment. If unavoidable, strictly control purge temperature below 200 degrees Celsius to prevent coating damage.
2. When starting and stopping the device, gradually heat and cool the heat exchanger to prevent excessive pressure differences and thermal shock. Follow "heat first, then cool" during shutdown and "cool first, then heat" during startup.
3. Before starting, ensure smooth operation of the threaded locking ring heat exchanger system, preventing overpressure on one side of the tube sheet.
4. Carefully check heat exchange equipment's operating parameters, prohibiting over-temperature and over-pressure. For designs with differential pressure, adhere to specified differentials during operation.
5. Operators must strictly follow safety regulations, conducting regular patrols on heat exchange equipment, checking foundation support stability, and inspecting for equipment leakage.
6. Frequently check medium temperature and pressure drop in the pipe and tube pass to analyze heat exchanger leakage and scaling. If pressure drop increases and heat transfer coefficient decreases, choose an effective cleaning method based on medium structure and heat exchanger design.
7. Regularly check for heat exchanger vibration.
8. During operation, strictly control the temperature of cold-swappable equipment with anti-corrosion coating to prevent coating damage.
9. Ensure the insulation layer remains intact.
