Title: Economizer for smoke tube boilers for high pressure steam and hot water

Abstract: An economizer system for preheating feed or return water in a high pressure steam or hot water smoke-tube boiler having a smoke-heated convection-effecting portion. The smoke tubes at the end of the smoke tube convection-effecting portion are surrounded by a jacket with staggered baffle plates penetrated by the smoke tubes so as to form a wavy or serpentine flow channel for the feed or return water in forced counterflow to the flue gas. The jacket may be encircled by a second jacket forming a chamber which may be filled with insulating material or form a preheater in the water supply system to the flow channel of the economizer.

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Inventors: Hededam, Poul L. (Hals, DK)

Application Number: 888424
Filing Date: 1978-03-20
Publication_date: 1980-01-08
Assignee: Indukal ApS (DK)
Primary Class(es): 122/412 122/83
Other Classes:
US Patent Ref:

525553	Sep, 1894	Keasbey	122/83.
543688	Jul, 1895	Keasbey	122/83.
799265	Sep, 1905	Reeve	122/412.
3793994	Feb, 1974	Olsen	122/90.

Other Refs:
Primary Examiner: Sprague, Kenneth W.
Assistant Examiner:
Attorney: Hill, Van Santen, Steadman, Chiara & Simpson