The main aim behind cooling the digested chip at the bottom portion of the digestor by injecting cold black liquor is to___________________?
Correct answer: A. Avoid mechanical weakening of fibre
- A. Avoid mechanical weakening of fibre
- B. Remove lignin by way of crystallisation
- C. Increase the cellulose content
- D. None of these
Explanation
Injecting cold black liquor cools the heavily digested chips and limits excessive exposure to high temperature and alkali, which can weaken the cellulose fibres mechanically. It is not intended to crystallise lignin or increase cellulose content.
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