Steam condensate recovery
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The last edit to this post was made by 2005180005 on 2020-5-21 at 13:07. In this process, the steam condensate (at 159°C) passes through a steam trap to remove water vapor before entering the atmospheric pressure flash tank. The vapor generated during flashing is cooled by a water cooler (using circulating water) and then returned to the atmospheric pressure flash tank. The steam condensate is pumped out of the process area using a steam condensate pump. I don’t understand why condensed water needs to be cooled and depressurized before it is recovered Can’t this be considered a waste?
“Why is it necessary to cool and depressurize condensed water before recovering it? I don’t deal with steam very often, so I’m not familiar with it. From a logical perspective, by asking this question, you can consider what would be more beneficial to do if you didn’t do this – how should you proceed? What problems will arise? Perhaps by thinking about it this way, one will understand why it was done.
It is an energy waste, but when combined with the actual equipment on site, recycling may require modifications; therefore, carefully consider the technical and economic feasibility. If it is feasible, go ahead and make the modifications without hesitation. Just as mentioned above, if you think deeply about it, you’ll become great: lol
It can be used as a heat source or directly fed back to the boiler
159 The condensate must be cooled before entering the deaerator. It’s either here with you or there with him. Steam water cooling is used to recover this flash steam for reuse as condensate. The lower the condensate temperature, the lower the condensate tank can be placed; this makes it easier for the steam trap to return liquid, and the pumps are also cheaper in such cases.
It’s an energy waste; therefore, you can replace the water cooler with another process that requires preheating, based on your actual conditions. This not only saves energy but also reduces the consumption of circulating water
Using circulating water is a waste; it would be possible to consider heat exchange with other low-temperature streams. In fact, there is no alternative for using this method in the facility: first, the flow rate of this material is low and unstable, and without an appropriate heat sink, it is difficult to recover heat; second, when cooling with circulating water, the temperature of the condensate can be easily controlled, which facilitates its subsequent reuse
“What does it mean that \"the lower the condensate temperature, the lower the condensate tank can be placed, making it easier for the hydroseparator to return liquid\"?
With a low condensate temperature, the pump’s NPSHr can be lower, and the condensate tank can be placed at a lower level. By placing the condensate tank low, the height difference between the water repellent device and the condensate tank is reduced, making it easier for the liquid to return.