It is difficult to avoid the occurrence of thermal cracking and oxidation in the entire process of the use of the heat-transfer oil of the asphalt spray truck . When the heat-transfer oil of the asphalt sprayer has reached the standard for scrap, if not If it is replaced or dealt with immediately, then the deterioration of the heat transfer oil will be accelerated, which will result in a great harm to the heating system of the asphalt sprayer. Even with the impact of the normal use of the equipment or caused damage, affecting the maintenance of asphalt pavement and construction effectiveness. When the thermal oil has reached the end of life, the oil will have residual carbon, acid value, viscosity, and the normal value of the flash point that exceeds the standard. The end result is corrosion equipment and Coking is a more serious situation, and it also leads to lower thermal conductivity, lower safety performance, and so on. Therefore, the timely replacement of the heat-transfer oil that has been scrapped can guarantee the necessary conditions for the safety and stability of the heating system. When using the heat transfer oil of the asphalt spray truck , it is necessary to regularly inspect and inspect the heat transfer oil system. It is also necessary to periodically take the heat transfer oil to perform the sample inspection. When some of the oil indicators have reached the standard of end-of-life At that time, it is necessary to take corresponding measures. When the solid coupling and viscosity increase, it causes or accelerates the degradation, resulting in a gradual decrease of the heat transfer coefficient of the fluid, and a large increase in the liquid stays in the coil of the vehicle. time. As the thickness of the liquid film increases, the temperature of the liquid film of the heat-conducting oil also continues to increase, which increases the boiling point of the boiling matter and the heat-conducting oil, and so on. If the acidity of the heat transfer oil is higher than the standard value of the organic heat carrier, this situation indicates that the hot fluid is already contaminated and oxidized. At this time, it is necessary to use exhaust-enhanced operation, adding fresh oil, filtering, and so on. Both can make the thermal oil can be temporarily improved and performance during the recovery period. However, if a lot of parameter values ​​are raised, then it is proved that the service life of the heat transfer oil has reached the stage where it needs to be replaced.  When replacing the heat transfer oil of the asphalt spray truck , the waste heat transfer oil in the system must first be discharged. Before operating, you need to look at the operating instructions of the product. Then, when the waste heat transfer oil is drained, it is necessary to take note of the prevention of leaks. The waste oil that has been discharged should be cleaned, and if necessary, nitrogen can be used for the purge.  In the need to clean the thermal oil system, the special cleaning agent is injected into the system, and the liquid is circulated and rinsed under high temperature for a period of time. If the system has severely degraded fluid, a large amount of solids and precipitates are caused. At that time, it may be that the coking in the furnace tube is already serious. Chemical cleaning coking and mechanical cleaning can be used. The best way to do this is to find a place that is also professionally cleaned. After the system is cleaned, if it is necessary to make new liquid supplements, it should be checked before it can be supplemented. For example, after the low-traffic areas have been completely removed, they will not be affected when new heat-conducting oils are added.
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