Oil heating process in a heat transfer oil boiler
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I have a few years of experience with boilers. Chain furnace. I have operated circulating fluidized bed boilers before. I’ve now started working at a new factory where boilers that use heat transfer oil are in use. I’ve used such boilers for a few months before, but I’m not familiar with the process of heating the oil. I’m the only person in the factory who has experience operating these boilers, and the management has asked me to take charge of the entire process of heating the oil. I feel a bit uneasy about this, so I’m seeking advice from those who are more experienced. . . I’ve watched some online tutorials, but I didn’t quite understand some of them.
Follow the oil cooking procedures provided by the oil manufacturer; heat it to a certain temperature and maintain that temperature while allowing it to circulate for a specified period of time
The main difficulty lies in exhaust; the circulation pump keeps getting emptied
The oil heating process generally involves the following steps: First, start the oil injection pump to pump the external heat transfer oil into the high-level expansion tank. Until the low liquid level alarm light in the expansion tank goes out. II. Start the heat transfer oil circulation pump to circulate the heat transfer oil in the system at low temperature for at least half an hour; once the heat transfer oil has fully circulated throughout the system, then turn on the heat transfer oil furnace. III. Heat up to 50°C at a rate of less than 20°C per hour, and maintain this temperature for 2 hours in a cyclic manner ； Then heat up to 80°C at a rate of less than 15°C per hour, and maintain this temperature for 3 hours in a cyclic manner ； Then raise the temperature to 100°C at a rate of less than 10°C per hour. IV. It is indicated by the stabilization of the outlet pressure of the hot oil circulation pump when the temperature of the hot oil is between 120–130°C). V. After the previous stage is completed, the temperature is raised at a rate of no more than 2°C per hour until it reaches 150°C; this stage should last for at least 10 hours, and during this time the system is in the exhaust phase. VI. Once the temperature of the heat transfer oil reaches 150°C, the system begins to raise its temperature at a rate of no more than 12°C per hour until it reaches 180°C, at which point the heat transfer oil is ready for use. VII. The furnace drying temperature is determined by the temperature at the furnace outlet. If, at a constant temperature, the temperature exceeds the specified value by a significant amount, the fire can be appropriately reduced.
Control the heating rate and the time at a constant temperature to prevent water emulsification in the oil. During the heating process, the oil tank and the surge tank are sealed with nitrogen to avoid safety accidents (flash point around 190 degrees)
The 4th floor has been fully answered. As a supplementary note, if the outlet pressure of the pump still does not increase at 80 degrees, be sure to remove and clean the pump’s inlet filter.
I’ve never used a heat transfer oil furnace before; it seems really amazing