Question

Q.1. The 10% sodium bicarbonate solution is made in the plant by adding two 50-1bm bags of
NaHCO3 powder to a batch dissolving tank filled to roughly 80% of its capacity. From the
dissolving tank, the solution is sent to a feed drum from which solution is pumped continuously
to the resin neutralizer. It takes an operator four hours to make a batch of solution, puinp
the
solution to the feed drum and rinse the dissolving tank to prepare it for the next batch. The feed
drum can hold a 2.5-day supply of solution. The addition of each new batch of solution brings
the feed drum contents up to a 2-day (48hour) supply, so that the plant can continue to run for
at least 40 hours if the bicarbonate powder inventory runs low or the dissolver is shut down for
maintenance. (Note: The specific gravity of a 10 wt% sodium bicarbonate solution is 1.08.)
(a) Sketch the entire operations using flow sheet/block diagram.
(b) Calculate the feed drum volume (liters), the volume of solution made in each batch (liters).
and the probable volume of the dissolving tank (liters).
(c) What is the minimum dissolving tank volume needed to meet the requirements of the
process? assuming that roughly four hours would be required to prepare a batch of any size
and the tank is always filled to 80% of its capacity? What are the benefits of using a larger
tank?
after an operatör finishes transferring a
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Answer 1

Answer:

The 10% Sodium Bicarbonate Solution Is Made In The Plant By Adding Two 50-1bm ... Powder To A Batch Dissolving Tank Filled To Roughly 80% Of Its Capacity. From The Dissolving Tank The Solution Is Sent To A Feed Drum From Which ... by adding two 50-1bm bags of NaHCO3 powder to a batch dissolving tank filled

Explanation:

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