Methods for reducing scale formation on and removing deposits from heat transfer surfaces
US9221701B2 · kind B2 · utility
1Cited by
7References
22Claims
0Family size
Assignee
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Key dates
| Filing date | Nov 21, 2011 |
| Grant date | Dec 29, 2015 |
| Priority date | — |
| Expiry date | Nov 21, 2031 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC02F2303/08
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Disclosed are methods of operating steam generators, particularly evaporators, in hard water environments characterized by high Si and Mg content in which the pHcold of the feed water stream is maintained within a range of about 11 to 12 in order to reduce, eliminate or remove scale from internal evaporator surfaces. Additional components may be added to the feed water stream including surfactants, chelants, dispersants, sequestrants and mixtures thereof.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.