1. Hidden danger of air and moisture entering

在加热启动过程中要反复打开排气阀，以排净系统中的空气、水与导热油混合蒸汽，并注意控制导热油升温速度。

In the process of heating and starting, the exhaust valve should be repeatedly opened to drain the mixed steam of air, water and heat transfer oil in the system, and pay attention to control the heating rate of heat transfer oil.

2、导热油品质下降产生的隐患预防

2. Prevention of hidden danger caused by quality decline of heat transfer oil

对于使用中的导热油，《有机热载体炉安全技术监察规程》规定每年对运动粘度、闪点、残碳、酸值至少检测一次。

For the heat transfer oil in use, the "Supervision Regulation on safety technology of organic heat carrier furnace" stipulates that the kinematic viscosity, flash point, residual carbon and acid value shall be tested at least once a year.

3、电加热棒结焦炭化的隐患

3. Hidden danger of coking and carbonization of electric heating rod

用电热棒加热导热油时，电热棒表面会很快结焦炭化，更终使电热捧烧毁，导热油报废。更好的解决方法是专门设计制造专用的电热棒，增大表面积，使捧表面温度低于导热油的允许液膜温度。

When the heat transfer oil is heated by the electric heating rod, the surface of the electric heating rod will be carbonized quickly, and the electric heating rod will be burned out and the heat transfer oil will be scrapped. The best solution is to design and manufacture special electric heating rod, increase the surface area, and make the surface temperature lower than the allowable liquid film temperature of heat transfer oil.

4、管道法兰或阀门间的泄漏隐患

4. Hidden danger of leakage between pipe flange or valve

管道系统中所有密封件应选用具有良好密封性和阻燃性的柔性和金属缠绕制品，切忌用含有橡胶成分的密封件。保温材料应采用空隙度小且不易受有机热载体浸渍的材料，以防有机热载体泄漏后造成保温层着火。

All seals in the pipeline system shall be flexible and metal wound products with good sealing and flame retardancy, and seals containing rubber components shall not be used. Thermal insulation materials should be made of materials with small voids and not easy to be impregnated by organic heat carriers, so as to prevent the insulation layer from catching fire after the leakage of organic heat carriers.

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