Calcium sulfate hemihydrate scaling threshold enhancement by magnesium ion augmentation
✍ Scribed by Julius Glater; Krishna S. Murdia; Richard Dooly
- Book ID
- 104112941
- Publisher
- Elsevier Science
- Year
- 1974
- Tongue
- English
- Weight
- 594 KB
- Volume
- 14
- Category
- Article
- ISSN
- 0011-9164
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✦ Synopsis
Efficient high temperature distillation of sea water cannot be realized without development of scale control systems for calcium sulfate . This paper describes a new concept of scaling threshold enhancement based on complexing a portion of dissolved sulfate ion in the form of stable MgSO 4 ' ion pairs. Complexing may be accomplished by augmentation of feed water with magnesium ion recovered and recycled from distilling plant blowdown . This "tying up" of sulfate ion results in higher solubility levels of calcium sulfate . Magnesium ion augmentation at levels up to three times ambient results in markedly improved resistance to hemihydrate scaling in natural sea water . Significantly higher levels of operating temperature and concentration factor may be achieved by this technology .