What Difficulties are Encountered in Internal Treatment?
The main difficulty is the presence of a large amount of sludge formed when feed-water hardness is high. This may increase the amount of blow-down required. When internal treatment is used alone (without pretreatment of the water by external means) there is more possibility for scale in the preboiler system and fee-water lines. it is important that someone experienced in the technology helps to set up an internal treatment programme which will minimize these difficulties.
