Book chapter
Nonchemical Methods to Control Scale and Deposit Formation
Mineral Scales and Deposits, pp 193-221
2015
Abstract
This chapter describes physical (nonchemical) water treatment (PWT) methods, which include permanent magnets, solenoid coils, radio frequency electric fields, high-voltage capacitance systems (i.e., electrostatic devices), and catalytic materials. The operating principle of the PWT is to produce colloidal particles of mineral ions in water, a process that is called bulk precipitation. In recirculating cooling water, the colloidal particles grow, resulting in particulate fouling (i.e., soft sludge coating) on a heat exchanger surface instead of precipitation fouling (i.e., hard deposit). Thus, if and when there is a sufficient shear force in a heat exchanger to remove the soft sludge coating, the PWT can keep the heat exchanger surface scale free.
Metrics
9 Record Views
6 citations in Scopus
Details
- Title
- Nonchemical Methods to Control Scale and Deposit Formation
- Creators
- Young I. Cho - Drexel UniversityHyoung-Sup Kim - Drexel University
- Publication Details
- Mineral Scales and Deposits, pp 193-221
- Publisher
- Elsevier
- Number of pages
- 29
- Resource Type
- Book chapter
- Language
- English
- Academic Unit
- Mechanical Engineering and Mechanics
- Scopus ID
- 2-s2.0-85044858823
- Other Identifier
- 991019174889504721