Insulation and heating for deaerator differential pressure level gauge
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The deaerator differential pressure level gauge is equipped with a condensate tank; how can insulation and heating be applied to prevent the condensate inside from evaporating or to avoid a low temperature of the condensate? Below is the insulation that’s been used currently, and it doesn’t seem to be very effective.
Steam tracing or electric tracing at the pressure tap
Wrap the heating tape inside the insulation material
Buy a bed cotton quilt, get some hemp rope, cover it and tie it up – that’s it {:2_42:}
Insulation is not a long-term solution. If you’re not afraid of the hassle, it’s best to wrap the level gauge with copper tubing before applying insulation; this gives the best results. Our phthalic anhydride production plant also used to have problems; the issue was resolved only after low-pressure steam was applied using copper pipes for connection
A thermal insulation plate is added in the middle of the light heat tracing; there’s a photo of the heat tracing in the attachments, but no thermal insulation plate is shown there
1. If conditions permit, light buildings can be added on the drum platform. 2. Add electric heating ； 3. Flush the level gauge at least once per shift
For electric heating, the temperature setting should not be too high
Electric heating is the best option. What is the purpose of this condensate tank?
If there is a concern that the insulation fluid might evaporate, use a self-temperature-regulating electric heat trace, as steam-based heating is difficult to control; in the latter case, insulating blocks can be added based on experience to reduce the heat transfer rate. If there is concern that the temperature of the isolation fluid will be too low, electric heating still seems to be the best option.
The isolation fluid tank is intended to achieve a stable pressure level on the low-pressure side of the instruments, or to isolate the system from high temperatures or corrosion, among other things.