Lesson 17: Blowdown Recovery System

Question 1

1. What is the purpose of the Blow down Recovery System?

Answer 1

Boiler water is sent through the Demineralizer, which removes silica so that it can be reused as clean condensate.

Question 2

2. If the Blow down Recovery System is not available what can we use to control Silica in Boiler water?

Answer 2

Big Blowdown

Question 3

3. What does the Blow down Recovery system heat exchanger use to cool the recovered water?

Answer 3

The primary heat exchanger uses condensate.

The secondary heat exchanger uses ACW.

Question 4

4. On the Small blow down what is the normal setting?

Answer 4

1/10th of a round

Question 5

5. Where does the Blow down Recovery storage tank pump the recovered water to when the tank becomes full?

Answer 5

Recovered water is pumped through the demineralizer then out to the condensate tanks.

Question 6

6. At what temperature does the Recovery block valve trip closed?

Answer 6

185 C

Question 7

7. What is the reason for tripping the recovery block valve?

Answer 7

To protect the heat exchanger and storage tanks.