In Figure 17-11, explain why the level in D-204 is dropping while the controller is in AUTO.
What will be an ideal response?
When the cooling water failed the ability of the condenser to condense the overhead vapor to liquid is stopped. The reflux temperature increases and flow to storage is stopped. In this case all of the vapors flow to the flare. As the heat increases the liquid in the accumulators absorbs enough heat to begin to vaporize. Even with the level controller set in AUTO and set at 50% the liquid begins to vaporize and flow out to the flare, decreasing the level in the accumulator.
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Fill in the blank(s) with the appropriate word(s).
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