explain the causes effects and removal at scale and sludge from the given water sample.
Answers
Answer:
DISADVANTAGES OF SLUDGE FORMATION :
Sludges are poor conductor of heat, so they tend to waste a portion of heat generated.
If sludges are formed along with scales, then former gets entrapped in the latter and both get deposited as scales.
Excessive sludge formation disturbs the working of the boiler. It settles in the regions of poor water circulation such as pipe connection, plug opening, gauge-glass connection, thereby causing even choking of the pipes.
11.2 PREVENTION OF SLUDGE FORMATION :
(1) By using well softened water, (2) By frequently ‘blow-down operation’, i.e., drawing off a portion of the concentrated water. Scales are hard deposits, which stick very firmly to the inner surfaces of the boiler. Scales are difficult to remove, even with the help of hammer and chisel. Scales are the main source of troubles. Formation of scales may be due to;
Explanation: