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Heat exchanger for a boiler

a technology of heat exchanger and boiler, which is applied in the direction of stationary plate conduit assembly, lighting and heating apparatus, station tubular conduit assembly, etc., can solve the problems of increasing the number of boiler components and increasing manufacturing costs, so as to reduce welding requirements, reduce welding requirements, and heat a fluid efficiently

Inactive Publication Date: 2010-11-18
IBC TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

"The present invention provides an improved heat exchanger for a boiler that has sufficient surface area to efficiently heat a fluid and is formed, at least in part, from a single blank to reduce welding requirements and thereby reduce metallurgical disturbances. The heat exchanger is in full ASME Section IV design conformity. The heat exchanger includes a central chamber for receiving a combustion gas, a baffle dividing the central chamber into a first section and a second section, and a plurality of spaced-apart flues disposed about a periphery of the central chamber. The flues allow for communication between the first section of the central chamber and the second sections of the central chamber, in particular, the flues allow for combustion gas to flow from the first section of the central chamber to the second sections of the central chamber."

Problems solved by technology

However, in the prior art, the use of numerous flues or fluid carrying tubes increases the number of component parts in the boiler.
This may result in increased manufacturing costs, particularly costs associated with the assembly of the boiler, because of the increased need for welding and / or riveting.

Method used

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  • Heat exchanger for a boiler
  • Heat exchanger for a boiler

Examples

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first embodiment

[0029]Referring to the drawings and first to FIG. 1, this shows an improved heat exchanger 10 disposed within a boiler housing 11. As best shown in FIG. 2, the heat exchanger 10 comprises a central cylindrical chamber 12. The central chamber 12 is divided into two sections 16 and 18 by a baffle 20 which is best shown in FIG. 3. Referring back to FIG. 2, a plurality of flues, for example, flues 22a and 22b are spaced-apart about a periphery of the central chamber 12. Each of the flues 22a and 22b is in communication with both the first and second sections 16 and 18 of the central chamber 12 via a corresponding fin 24a and 24b, respectively. As shown for a first one of the flues 22a, each of the flues is provided with a cap or fitting 23 and 25 at each end thereof. The fittings 23 and 25 close off ends of the flue 22a. The caps or fittings 23 and 25 together with boiler housing 11 allow the heat exchanger 10 to be used in elevated pressure service, for example, domestic hot water supp...

second embodiment

[0044]Referring now to FIG. 12 this shows an improved heat exchanger 110. In FIG. 12 like parts have been given like reference numerals as in

[0045]FIG. 2 with the additional prefix “1”, i.e. the central chamber is given reference numeral 12 in FIG. 2 and reference numeral 112 in FIG. 12, similarly the baffle is given reference numeral 20 in FIG. 2 and reference numeral 120 in FIG. 12.

[0046]The heat exchanger 110 shown in FIG. 12 is generally similar to the heat exchanger shown in FIG. 2 with the exception that the second embodiment of the heat exchanger 110 is provided with a plurality of divider stays 121a and 121b which extend radial from the first section 116 of the central chamber 112. As shown for a first one of the fins 124a, the second embodiment of the heat exchanger 110 is also provided with a plurality of protrusions 127a and 127b stamped into the fins. The divider stays and protrusions are best shown in FIGS. 12 to 17.

[0047]A lowermost one of the divider stays 121b is gen...

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Abstract

A heat exchanger for a boiler comprises a central chamber for receiving a combustion gas. A baffle divides the central chamber into a first section and a second section. The baffle also restricts the combustion gas from flowing directly from the first section of the central chamber to the second section of the central chamber. There is a plurality of spaced-apart flues disposed about a periphery of the central chamber. The flues allow for communication between the first section of the central chamber and the second section of the central chamber, in particular, the flues allow for combustion gas to flow from the first section of the central chamber to the second sections of the central chamber.

Description

CROSS-REFERENCE TO RELATED APPLICATION[0001]This application claims the benefit of provisional application 61 / 167,797 filed in the United States Patent and Trademark Office on Apr. 8, 2009, the disclosure of which is incorporated herein by reference and priority to which is claimed.BACKGROUND OF THE INVENTION[0002]1. Field of the Invention[0003]The present invention relates to boilers and, in particular, to a heat exchanger for a boiler.[0004]2. Description of the Related Art[0005]Boilers are well known in the art and have numerous applications. For example, boilers may be used to provide hot water and heating for domestic or industrial use. Boilers may also be used to provide steam for use in process applications or locomotion of ships, trains, and other vehicles.[0006]In fire-tube boilers, flue gases are channelled through flues surrounded by a fluid being heated. The boiler housing is a pressure vessel and contains the fluid which is typically water. Preferably numerous flues are...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): F24H1/18F28F13/12F28F7/00
CPCB21D53/04F24H1/285F28F2009/222F28D9/0025F28F2215/06F28D7/1676
Inventor TERON, ALLANMACGOWAN, BRUCE
Owner IBC TECH