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The reason for the high temperature of the high tank of the heat-conducting oil boiler

2021-05-07 09:28    page view:

Guide: The heat-conducting oil boiler can reach a higher medium temperature with a lower boiler pressure, is safe and stable in operation, can be used in various drying processes, and has a wide range of uses. The heat-conducting oil boiler is equipped with high slot and low slot. What is the reason for the high temperature of the high slot? Why does the boiler need to dehydrate the exhaust gas?

The heat-conducting oil boiler can reach a higher medium temperature with a lower boiler pressure, is safe and stable in operation, can be used in various drying processes, and has a wide range of uses. The heat-conducting oil boiler is equipped with high slot and low slot. What is the reason for the high temperature of the high slot? Why does the boiler need to dehydrate the exhaust gas?

1. How to solve the high temperature of the heat conduction oil boiler high tank

  1. First check whether the forced exhaust pipe is completely closed, whether there is any leakage in the inner boiler, and whether it is hot by hand.

  2. Is the height of the high slot high enough, it is best to be 3~5 meters away from the highest point of the boiler system (including equipment), and a GB of 1.5~2 is obviously not enough. The higher the better.

  3. System piping design problem, main line design is too fine

  4. Reducing the circulation rate will cause the heat transfer oil to stay in the boiler for too long, which can easily cause thermal cracking and thermal oxidation of the oil!

  5. Take some oil samples, check and see the situation! Boiler desulphurization and dust removal Coal-fired boiler

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2. Reasons for the dehydration and exhaust of the heat-conducting oil boiler

  The heat transfer oil used contains water, and the system will not operate normally without dehydrating and exhausting. The operation of the heat-conducting oil boiler should be carried out according to its sequence to avoid accidents. The dehydration and exhaust of the heat-conducting oil furnace is a more dangerous stage in the operation and requires special care. Heat conduction oil boiler ignition and heating must follow the principle of "one slow and two stops". One slow means that the heating rate should be slow, and the second stop means that the heating should be stopped in the two temperature ranges of 120 degrees-150 degrees and 210 degrees-230 degrees. Maintain this temperature for a period of time. time.

  After the furnace is ignited, the temperature rise is controlled to 10 degrees/H until it is close to 100 degrees. Because of the high viscosity of the oil in the cold state of the boiler, the flow velocity in the tube on the heating surface is low, the oil film on the pipe wall is thick, and the heat transfer conditions are poor. If the heating rate is too high, it is easy to cause the local oil film temperature to be too high. Not only blindly speed up the heating and dehydration process, because once the water in the system violently evaporates and vaporizes, the volume will expand more than 1,000 times, which may not only cause "bumping" and cause the oil level to expand rapidly and spray out a large amount, but also may cause the pressure of the entire system to rise sharply. When the component is evacuated again (the pump inlet pressure drops below 0.1mpa, there is a heavy panting sound), then the next step can be carried out. Speaking of boilers, exhaust channels will definitely be equipped to remove smoke in time and strengthen the use of energy. During the heating process of the heat-conducting oil boiler, various low-boiling substances contained in the heat-conducting oil are separated from the heat-conducting oil in the form of gas one after another, and the water is also dispersed with the heat-conducting oil in the form of vapor.

  When cooling water leaks into the operating thermal oil boiler system. It is also quickly separated from the heat transfer oil in the form of water vapor. The connection point of the dry expansion pipe is the lowest pressure area in the main circulation pipeline of the heat-conducting oil boiler, so when the oil and gas (steam) are separated, a large number of gas (steam) bubbles are generated from the expansion pipe to escape from the expansion tank to escape. Pressure. If the gas (steam) body cannot escape, the working pressure of the heat-conducting oil boiler and system will greatly exceed its allowable value, and it will hinder normal operation and cause malfunctions.

The reason for the excessively high temperature of the high tank of the heat-conducting oil boiler and the reason for the dehydration and exhaust is described above. The heat-conducting oil boiler is a pressure vessel. When the boiler is installed, it must be submitted for inspection and acceptance and obtained a boiler operation certificate. Pay attention to safety during use, and keep the boiler pressure within a safe range at all times to ensure safety.

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