Advanced sootblower nozzle design
US5375771A · kind A · utility
Inventors
Key dates
| Filing date | Feb 10, 1993 |
| Grant date | Dec 27, 1994 |
| Priority date | — |
| Expiry date | Feb 10, 2013 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S239/13
- WIPO fieldThermal processes and apparatus
- WIPO sectorMechanical engineering
Abstract
A nozzle suitable for use with a device for removal of deposits from contaminated surfaces, such as a sootblower in a heat recovery boiler, is designed to avoid normal shock wave formation, and hence energy dissipation, by achieving a condition whereby, the emergent steam pressure (p.sub.e) is related to the ambient pressure (p.sub..infin.) by the relationship p.sub.e /p.sub.28 <about 2, preferably about 1. A compact design achieving this result and able to function over a wide range of flow rates comprises a cylindrical body with a downstream convergent outlet and a rounded-head conical insert located axially in the body with its maximum dimension generally coinciding with the commencement of convergence of the outlet and extending through the outlet.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.