The heat transfer oil has the properties of resistance to thermal cracking and chemical oxidation, good heat transfer efficiency, fast heat dissipation and good thermal stability. As a heat transfer medium for industrial oils, heat transfer oil has the following characteristics: Under almost normal pressure conditions, high operating temperatures can be obtained. That is, the operating pressure and safety requirements of the high-temperature heating system can be greatly reduced, and the reliability of the system and equipment can be improved; the process requirements of heating and cooling at different temperatures can be met in a wider temperature range, or the same system can be used in the same system. The heat transfer oil simultaneously achieves the process requirements of high temperature heating and low temperature cooling. That is, the complexity of the system and operation can be reduced; the water treatment system and equipment are omitted, the thermal efficiency of the system is improved, and the maintenance workload of equipment and pipelines is reduced. That is, the initial investment and operating cost of the heating system can be reduced; in the case of a system leakage caused by an accident, the heat transfer oil may be combusted when it meets an open flame, which is a problem in the heat transfer oil system compared with the water vapor system. However, in the absence of leakage, because the heat transfer oil system operates under low pressure conditions, its operational safety is higher than that of water and steam systems. Compared with molten salt of another type of high-temperature heat transfer medium, the heat transfer oil has an absolute advantage over the heat transfer oil in terms of the price and service life of the heat transfer medium at an operating temperature of 400 ° C or higher, but is otherwise in other respects. Obvious disadvantage, especially in terms of the complexity of system operation.
Characteristics of organic heat carrier boiler
It is chemically stable and is not as easy to burn as light oil. From a usage and security perspective, its main features are
1. Within the allowable temperature range, the thermal stability is better, the coking is less, and the service life is longer.
2. Good thermal conductivity, flowability and pumpability in the allowable temperature range.
3. Low toxicity, no odor, no corrosion equipment, little impact on the environment.
4. The freezing point is lower, the boiling point is higher, and the content of low boiling point components is less. In the allowable temperature range, the vapor pressure is not high and the evaporation loss is small.
5. When the temperature is higher than 70 °C, it will be strongly oxidized when it is in contact with air. The heated working system needs to be sealed, and only it is allowed to contact with air at a temperature below 70 °C.
6. The volume expansion is significant after heating, and the expansion rate is much larger than water. The temperature rises to 100 ° C, and the volume expansion rate can reach 8% to 10%.
7. Cracking or condensation occurs during overheating, coking or carbon deposits in containers, pipes.
8. When mixed with water or low boiling components, the vapor pressure will increase significantly after heating.
9. The flash point, ignition point and spontaneous ignition point are both high, and will not ignite when the temperature is allowed and sealed.
10. According to the area where the user lives and the working environment of the equipment, it is recommended to select the heat transfer oil with suitable low temperature performance.