Organic heat carrier boiler (heat transfer oil furnace)
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Do the oil storage tank (for storing heat transfer oil) and the high-level oil sump of organic heat carrier boilers (heat transfer oil furnaces) need to be insulated? A few days ago, when they came to our company to inspect the boilers, they asked us to remove the insulation from these two units, stating that insulation was not allowed. Does anyone have any relevant information? Please share it, thanks :)
The last edit to this post was made by Watcher Star on 2018-7-31 at 13:00. Insulation is not allowed; there are standards regarding this, so check the specifications for organic heat carrier boilers
Is there a nitrogen seal device? What is the material of the container?
For safety reasons, any leakage of heat transfer oil must be detected promptly. The insulation layer can prevent leaks from being detected in a timely manner. The temperature of the heat transfer oil in the tank is higher than its flash point, and a leak can easily lead to combustion.
I searched for several regulations related to boilers, but didn’t find any rule stating that oil storage tanks are not allowed to have insulation
No, it’s just ordinary carbon steel
Point 6 of Article 21 in the now-replaced \"Regulations on Safety Supervision of Organic Heat Carrier Boilers\" states that expansion tanks and insulation pipes shall not be fitted with insulation measures, and the temperature of the organic heat carrier inside the expansion tank should not exceed 70°C. The reasons given for the new regulations are as follows (in brief): ① Large temperature differences cause thermal convection between the medium inside the tank and the system; it is difficult to keep the temperature of the medium inside the tank below 70°C in actual operation ； ②In an open system, thermal convection and medium agitation actually increase the opportunities for more heat carriers to come into contact with air, thereby accelerating oxidation ； ③Do not scald the staff without insulation. The explanation states that the old regulations prohibited insulation because of the temperature of the fluid in open systems, which was intended to be kept below 70°C in order to reduce oxidation rates; however, there is a gap between theory and practice. Information on other standards: Appendix D.3.2 of GB23971: At operating temperatures above 100°C, organic heat carriers react with oxygen in the air to form oxides and other substances.