Heat Transfer Oil Boiler Routine Maintenance Considerations and Best Practices

As a kind of high-efficiency thermal energy equipment, thermal oil boiler is widely used in chemical industry, metallurgy, food processing and other industries. In the production process, the boiler undertakes important heating tasks, so its stability and efficiency directly affect the smooth operation of the production line. In order to extend the service life of the boiler, to ensure the smooth running of production, routine maintenance work is crucial. In this article, we will introduce the precautions for routine maintenance of thermal oil boilers to help operators do a good job of equipment maintenance and ensure that the boiler is always in the best operating condition.

I. Regular inspection of the external and internal condition of the boiler

The external and internal condition of thermal oil boilers is an important factor affecting their operational efficiency and safety. Regular inspection of the external and internal condition of the boiler can detect potential faults in time and avoid the expansion of the problem.

1. External inspection
   Check the external condition of the boiler before the start of each day's work to ensure that there is no visible damage or abnormality on the outside of the boiler. Check that the shell of the boiler is not cracked or corroded, that the smoke exhaust system is free from obstruction, and that the exhaust pipework is not blocked, etc. Regularly clean the dust and dirt on the surface of the boiler and maintain good ventilation conditions to avoid affecting the cooling effect of the boiler due to dirt accumulation.
2. Internal inspection
   Regularly check the internal parts of the boiler, such as the boiler liner, furnace, heat exchanger, etc., for any accumulation of scale, corrosion or wear and tear. The quality of the heat carrier oil also needs to be tested regularly to ensure that the oil is not deteriorated or contaminated to avoid affecting thermal efficiency and heat transfer.
3. Checking the insulation
   Insulation is one of the important parts of a boiler that effectively reduces heat loss. Regularly check whether the insulation is intact to ensure that the thermal efficiency of the boiler is not affected. If the insulation is found to be damaged or aged, it should be repaired or replaced promptly.

II. Check and replace the heat carrier oil

Heat carrier oil is the core medium of heat transfer oil boiler, responsible for transferring heat energy from the boiler to the production equipment. Therefore, the quality of heat carrier oil directly affects the operating efficiency of the boiler and the life of the equipment. The following aspects need to be paid attention to in daily maintenance:

1. Check oil level
   Regularly check the oil level of the heat carrier oil to ensure that it is within the normal range. If the oil level is too low, the heat carrier oil should be replenished in time to ensure the normal operation of the boiler.
2. Oil change
   Over time, the heat carrier oil may become contaminated or decompose, resulting in a loss of thermal efficiency. Replace the heat carrier oil regularly according to the manufacturer's recommendations, generally once a year or periodically depending on use.
3. Oil quality testing
   For long-term use of heat carrier oil, oil quality testing is required to check its viscosity, acidity, oxidation and other indicators to ensure that the oil meets the standards. If the oil quality is poor or contamination occurs, it should be replaced in time.
4. Avoid oil spills
   Regularly check for leaks in areas such as oil pipework, valves and joints. Oil leaks not only lead to energy waste, but can also cause fire or pollution problems. When leaks are found, they should be repaired promptly.

III. Checking the combustion system and gas supply

The combustion system is a crucial component in the thermal oil boiler, and the stability of the gas supply and the efficiency of the burner directly affect the thermal efficiency and safety of the boiler. The following aspects need to be paid attention to in daily maintenance:

1. Burner inspection
   Regularly check that the flame of the burner is stable and that there is no incomplete combustion. Clean the burner nozzles to ensure that the burner orifices are not blocked and that the gas supply is smooth.
2. Combustion efficiency check
   Check the combustion efficiency of the boiler to ensure that the gas is completely burnt. Use appropriate instruments to check the oxygen content and carbon dioxide concentration of the discharged gas to ensure that the boiler operates under optimum combustion conditions.
3. Gas supply inspections
   The stability of the gas supply is vital to the operation of the boiler. Regularly check gas pipework, valves and pressure regulators to ensure that the gas supply is normal. If abnormal gas flow or pressure is found, adjustments should be made promptly.
4. Clean smoke evacuation system
   The flue gas discharge system is prone to accumulation of oil, dust and other pollutants, leading to poor flue gas discharge and affecting the combustion efficiency and safety of the boiler. Clean the smoke exhaust pipe, chimney and flue gas treatment device regularly to keep the smoke exhaust system free from obstruction.

IV. Checking temperature and pressure control systems

The temperature and pressure control system is the core guarantee for boiler operation, ensuring safe and stable operation of the boiler. During routine maintenance, the following needs to be checked:

1. Temperature control system check
   Check that the boiler's temperature control system is working properly to ensure that it can accurately regulate and control the temperature. Check temperature sensors and control valves to ensure they are not faulty.
2. Pressure control system check
   Thermal oil boilers are not usually subjected to excessive pressure, but they still need to be monitored for pressure values. Check that pressure gauges, pressure sensors and safety valves are working properly to prevent boiler damage or safety accidents due to high or low pressure.
3. System automatic adjustment function
   Check that the automatic adjustment function of the boiler is sensitive to ensure that the boiler is able to adjust its operating status in time to maintain stable operation when the temperature and pressure change.

V. Cleaning and checking boiler safety devices

The safety of the heat transfer oil boiler is very important, and special attention should be paid to the safety devices of the boiler during routine maintenance to ensure that they are in effective working condition.

1. Safety valve inspection
   The safety valve is an important safety device for the boiler, used to prevent overpressure in the boiler. Regularly checking the sensitivity of the safety valve ensures that it is able to release pressure in a timely manner when the pressure exceeds the set value, preventing boiler damage or explosion.
2. Regular cleaning of filters and cooling systems
   Regularly check and clean the boiler's filter to ensure that the oil lines are not blocked. Check the cooling system to avoid overheating the boiler due to inadequate cooling.
3. emergency stop
   Regularly test the boiler's emergency shutdown device to ensure that in the event of a malfunction or abnormal condition, the boiler can be shut down quickly, reducing the risk of an accident.

Routine maintenance of thermal oil boilers is vital to ensure their long-term efficient and safe operation. By regularly checking the external and internal condition of the boiler, the quality of the oil, the combustion system, the temperature and pressure control system and the safety devices, it is possible to effectively prevent equipment failures, improve the thermal efficiency of the boiler and extend its service life. Proper maintenance not only reduces the failure rate and downtime, but also helps companies save energy, lower operating costs and improve productivity.

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