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1. (WO1998049493) DRUM-TYPE BOILER WITH ENHANCED CIRCULATION

Pub. No.:    WO/1998/049493    International Application No.:    PCT/US1998/007091
Publication Date: Fri Nov 06 00:59:59 CET 1998 International Filing Date: Thu Apr 09 01:59:59 CEST 1998
IPC: F22B 1/18
F22B 29/04
Applicants: GUREVICH, Arkadiy, M.
Inventors: GUREVICH, Arkadiy, M.
Title: DRUM-TYPE BOILER WITH ENHANCED CIRCULATION
Abstract:
A drum-type boiler is provided. The boiler's evaporator is divided into two sections (116A, 116B) which are connected in parallel to the drum (112). The first evaporator section (116A) relies on the feedwater pump (138) to provide forced circulation. The second evaporator section (116B) relies primarily on natural circulation but may also be assisted by the feedwater pump. This design provides a boiler which is reliable under all operating conditions, including start-up, transient conditions, and steady state conditions, without requiring the use of circulating pumps or an auxiliary energy source (steam, water, gas, etc.).