Is scaling in the purified water serious?
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The purified water we have now needs to have its temperature reduced from 75ºC to 40ºC using circulating water in a purified water cooler. If the purified water flows through the shell side of this heat exchanger, it’s not clear to what extent scaling will occur. What type of heat exchanger is generally used for this purpose? O(∩_∩)O Thank you @ylb913
From 75 to 40°C lower, scaling should be virtually none, and operation with a shell layer is feasible.
Compared to circulating water, which one is more prone to scaling?
Purified water should not contain scale, but we have coking wastewater, which causes blockages more quickly than scale.
Upstream, we don’t have delayed coking; logically, this purified water is equivalent to water that has been boiled, so there shouldn’t be much of a problem
In all our applications, the purified water flows through the shell side, while the circulating water flows through the tube side. Feedback from the field indicates that the purified water is cleaner than the circulating water; the specific type of heat exchanger used is BEU
I think it should be handled properly to avoid oversaturation, in both the shell side and the tube side.
The purified water is quite clean. Do you use recirculated water to exchange heat with the purified water? You can try exchanging heat between acidic water and purified water; this way, the acidic water will have a higher temperature when it enters the tower, saving steam. However, the heat exchanger is prone to corrosion
I have some ideas regarding the heat exchange between purified water and acidic water. However, with this method, the temperature of the purified water can only be reduced to around 70ºC; it still needs to be cooled using circulating water before it can be sent to the wastewater treatment plant. Isn’t that how you do it?
How many sets of heat exchangers? ? A small number won’t do; we have 3 groups, with 2 units in each group