Surface treatment process and device for heat exchangers
US4826582A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 5, 1986 |
| Grant date | May 2, 1989 |
| Priority date | — |
| Expiry date | Aug 5, 2006 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF28G13/00
- WIPO fieldThermal processes and apparatus
- WIPO sectorMechanical engineering
Abstract
A device (50) for treating the inner surface of a steam generator heat exchange tube (1) is introduced into the tube (1), the region to be treated is isolated from the remainder of the tube (1), an electrolyte is circulated in this region to carry out the treatment, an electrical field is created between the treatment device (50) and the tube (1) to produce a migration of ions in both directions, the electrical field created is reduced to zero, the electrolyte is removed to a treatment unit and then a compressed-air purge is carried out, the treated region is rinsed with demineralized water and the water is drained, and, lastly, an additional compressed-air purge is carried out.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.