Impulse ash deposit removal system and method
US6684823B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 11, 2003 |
| Grant date | Feb 3, 2004 |
| Priority date | — |
| Expiry date | Apr 11, 2023 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/455
- WIPO fieldThermal processes and apparatus
- WIPO sectorMechanical engineering
Abstract
An impulse generator produces controlled pressure waves for removing ash deposits from heat exchangers in a boiler. The impulse generator has a fuel inlet, an air inlet, an ignitor, an outlet, and a control system for selectively and intermittently igniting the fuel and air to produce the pressure waves. In a first exemplary embodiment, the impulse generator includes a toroidal-shaped body with a tangential air inlet for inducing a helical swirling flow of the fuel and the air. In a second exemplary embodiment, the impulse generator includes a turbulizer with a corkscrew-shaped vane for inducing a helical swirling flow of the fuel and the air. In addition, an exemplary ash deposit removal method includes adjusting the fuel flow, airflow, ignition dwell time, and/or ignition interval time to selectively adjust the combustion mode between deflagrative and detonative combustion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.