Title:
BOILER INTERNAL FLUE GAS BY-PASS DAMPER
Document Type and Number:
WIPO Patent Application WO2002050403
Kind Code:
A3
Abstract:
A flue gas passage arrangement (12) for a steam generator which permits adjustment of the heat transfer effectiveness of a final bank of heat exchanger surface (16) to control a temperature of the flue gas flowing through and exiting from the flue gas passage and conveyed to a downstream NOX reduction device (36) having a minimum operating temperature. The NOX device is advantageously an SCR (36). Economizer heating surface is located within the flue gas passage, and a baffle plate (30) extends through the flue gas passage and creates two flue gas paths (26, 28) there through. The economizer heating surface may be a single, common bank having a section located in both gas paths, or in only one gas path. Alternatively, two separate banks of economizer heating surface may be employed. A variable position damper (32) is provided in one gas path, either below or above the section.
Inventors:
DESELLEM JAMES F
Application Number:
PCT/US2001/049422
Publication Date:
September 12, 2002
Filing Date:
December 19, 2001
Export Citation:
Assignee:
BABCOCK & WILCOX CO (US)
International Classes:
F22B37/00; (IPC1-7): F23J15/00; F22G5/04
Foreign References:
| US4738226A | 1988-04-19 | |||
| US3643634A | 1972-02-22 | |||
| US3345975A | 1967-10-10 | |||
| US2886013A | 1959-05-12 | |||
| US2985152A | 1961-05-23 | |||
| US6146605A | 2000-11-14 | |||
| US4245569A | 1981-01-20 |
Download PDF:
Previous Patent: IMPINGEMENT COOLING SCHEME FOR PLATFORM OF TURBINE BUCKET
Next Patent: STEAM TURBINE DEVICE
Next Patent: STEAM TURBINE DEVICE