Heating for liquid sulfur tanks, pump selection, etc
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This post was last edited by haichuan*aomay on 2016-7-14 09:16. Original question: I have a question – do the units you work in have liquid sulfur tanks, and what is their capacity? What type of heat tracing is being used? How effective is it? New questions: 1) For the liquid sulfur storage tanks on the ground, what method is used to prevent corrosion of their inner walls? 2) Is the vent on the liquid sulfur tank normally open? Is there heat tracing at the crown? 3) What type of liquid sulfur pump is preferable for outdoor use? Vertical liquid sulfur tanks and horizontal liquid sulfur pumps are commonly used, but it seems that leaks are inevitable with horizontal pumps, resulting in significant on-site handling efforts ； There are also cases where pits are dug next to liquid sulfur tanks, using vertical pumps. Those who have used it, please share your opinions.
There used to be full jackets, but now it has internal coils.
May I ask what is the capacity of the liquid sulfur tank here? How many layers does the inner coil have, and have there been any problems during operation?
Steam inner coil. It usually has an inner and an outer layer. Ensure proper insulation at the outlet; otherwise, it won’t flow out ； The inner coil may leak, and it is difficult to repair.
This post was last edited by ylb913 on 2016-4-20 at 19:48. Inner coiled tubes can be used in underground liquid sulfur tanks; then why can’t they be used in above-ground liquid sulfur storage tanks? While carbon steel inner coiled tubes are indeed not durable, stainless steel ones perform very well. There’s not much to say about our tank – it was modified from an electrodialysis tank, with two sets of coils and a capacity of 130 liters; the coils are located at the bottom of the tank, in three layers arranged in a folded pattern. The performance was better than I expected. Before putting it into use, we filled it with water to heat it up, and it boiled very quickly. I have also seen other manufacturers use 500-liter dome tanks; this one cannot possibly have a jacket.
The heating coil should work if the heat exchange area is calculated theoretically. The reason for asking about the tank’s capacity is that, as far as I know, the largest tank that can be heated using a heating coil (from what I’ve heard) has a capacity of 1000 cubic meters; for larger tanks, design firms recommend using electric heating. I’m not sure if there are any records of the use of large tanks with electric heating Does the choice between steam heating and electric heating also depend on the size of the tank?
I feel that the control devices are usually located at the bottom of the tank, while the electric heating elements should be placed around the tank’s body. For very tall tanks, heating only the bottom of the tank may not be sufficient.
That’s right. The heat exchange area of the heating coil at the bottom of the tank is also adjusted to be sufficient to melt the liquid sulfur inside the tank (theoretically), and together with the temperature inherent in the liquid sulfur, this ensures that the substance remains in a liquid state within the tank. The tank wall is heated using electric heat tracing or steam coils, to prevent sulfur from accumulating on it and to provide some heat inside the tank. For large tanks, it is difficult to manufacture heating coils on the outer wall; therefore, using electric heat tracing is a relatively easier option. Just, is it really necessary to add heat tracing for insulation on this tank wall? Based on the information available so far, Tenglong Aromatics has a liquid sulfur tank with a capacity of 2,000 cubic meters; the tank walls do not have heating elements, only ordinary insulation. Inside the tank is a steam-heated coil.
Well, not very big. It seems to be only about ten square meters