US3776199A

US3776199A - Regenerative heat exchanger

Info

Publication number: US3776199A
Application number: US00250796A
Authority: US
Inventors: J Miller
Original assignee: HY WAY HEAT SYSTEMS
Current assignee: GENERAL CCOMBUSTION Corp
Priority date: 1972-05-05
Filing date: 1972-05-05
Publication date: 1973-12-04
Anticipated expiration: 1990-12-04

Abstract

A heat exchanger comprises a cylindrical body having closed ends with means in one end for introducing the products of combustion thereinto and venting the same therefrom. The introduction is by means of a directional nozzle positioned axially of the cylindrical body. A tubular baffle is positioned axially of the cylindrical body in spaced relation to the directional nozzle and the cylindrical body so that the action of the jet-like introduction of the products of combustion into the tubular baffle will recirculate gases from within the cylindrical body in a regenerative effect so as maintain an even temperature on the surface of the cylindrical body which is emerged in a tank of liquid to be heated.

Description

[4 1 Dec. 4, 1973 REGENERATIVE HEAT EXCHANGER [75] Inventor: John H. Miller, Youngstown, Ohio [73] Assignee: Hy-Way Heat Systems, Inc.,

Youngstown, Ohio [22] Filed: May 5, 1972 [21] Appl. No.: 250,796

3 ,68 l ,5 66 8/ 1 972 Sellers 126/343 .5

Primary Examiner-Kenneth W. Sprague AttorneyWebster B. Harpman [57] ABSTRACT A heat exchanger comprises a cylindrical body having closed ends with means in one end for introducing the products of combustion thereinto and venting the [52] U.S. Cl. 122/33, 122/136 same therefrom The introduction is by means of a [51] f F22! 7/00 rectional nozzle positioned axially of the cylindrical Fleld of Search body. A tubular baffle i p i i axially of the y 431/1 16; 126/3435 360 R lindrical body in spaced relation to the directional nozzle and the cylindrical body so that the action of [56] References C'ted the jet-like introduction of the products of combustion UNITED STATES PATENTS into the tubular baffle will recirculate gases from 3,349,754 10/1967 Bock .Q 122/136 X Within the cylindrical body in a regenerative effect so 3,685,977 8/1972 Goodman 431/116 X as maintain an even temperature on the surface of the 3,171,338 3/1965 Ganz 122/149 cylindrical body which is emerged in a tankof liquid 2,794,426 6/1957 Lowery. 122/136 to be heated, I 3,269,448 8/1966 Martin 431/116 2,717,580 9/1955 Maher 122/136 X 5 Claims, 2 Drawing Figures REGENERATIVE HEAT EXCHANGER BACKGROUND OF THE INVENTION 1. Field of the Invention This invention relates to heat exchangers of the direct fire type and capable of emersion in a tank of liquid to be heated such as a heating oil or an asphalt or the like.

2. Description of the Prior Art Prior structures of this type have employed tank-like or tubular constructions into which the products of combustion are introduced with-the tank-like or tubular members being emersed or partly emersed in a tank of fluid to be heated and in order to avoidthe creation of undesirably high surface temperatures, efforts have been made to baffle the products of combustion with respect to the surface of the heat exchanger. (See for example US. Pat. Nos. 3,266,485? 3,194,229, 3,503,382 and 3,319,709.)

This invention provides a substantially improved result by creating a circulation of the products of combustion within the heat exchanger so as to maintain an even surface temperature and thereby avoid coking of oil or asphalt materials in which the heat exchanger is emersed.

SUMMARY OF THE INVENTION A heat exchanger, particularly suitable for heating oil for subsequent circulation to other heat exchangers or for heating asphalt so as to maintain the same at a desired fluid temperature consists of a cylindrical body with means in one end for directing the products of combustion as from an oil burner axially of the cylindrical body in a jet-like configuration and the positioning of a tubular baffle in spaced relation to the cylindrical body and in spaced relation to the directional nozzle for receiving the jetlike configuration of the products of combustion whereby recirculation of the gases within the cylindrical body is achieved which results in an even surface temperature over the entire cylindrical body making it particularly suitable for emersion heating in a tank of oil or asphalt or the like.

DESCRIPTION or THE DRAWINGS FIG. 1 is a cross sectional side elevation with parts broken away illustrating the heat exchanger and its positioningin a tank of fluid to be heated.

FIG. 2 is a vertical section on line 2-2 of FIG. 1.

DESCRIPTION OF THE PREFERRED EMBODIMENT In its simplest form the heat exchanger of this inventioncomprises an elongated cylindrical body member 10*having a closed end 11 and an apertured end 12. The apertured end 12 provides for the communication of anoil burner 13 and a directional nozzle 14 located larbaffle 16 with respect to the cylindrical body 10 and it -willbe observed that ,the open end 18 of the tubular baffle '16 is spaced with-respect to the closed end 11 of the cylindricalbody and that the tubular baffle 16 is provided with a plurality of perforations 20 inwardly from theopen end 18;" v

Stillreferrin'g to FIG: 1 of the drawings it will be seen that the cylindrical body 10 is positioned within a tank 21 and that a vent 22 extends through the tank 21 and into the cylindrical body 10 adjacent the apertured end 12 thereof. In FIG. 1 of the drawings the configuration where they are directed in the opposite direction toward the vent 22 the gaseous products of combustion" will also flow out of the perforations 20 and thus reduce theend pressure at this pointand'provide for a more desirable rate of flow of the combustion gases in the end of the heat exchanger adjacent the closed end 11.

Further directional arrows in FIG. 1 of the drawings will show that some of the recirculating gases moving toward the vent 22 are drawn .into the open end 17 of the tubular baffle 16 by the jet-like actionof the products of combustion.

By referring now toFIG. 2 of the drawings it will be I seen that the axialposi't'ioningof the tubular baffle 17 is such that the space between the'same and the cylindrical body 10 of the heat exchanger creates a realtively larger retumpassageway thereabout with the resultant slowing down of the flow of the combustion gases and contributes to the even surface temperature realized longitudinally of the device from the apertured end 12 to the closed end 11 of the cylindrical body thereof.

Although but one embodiment of the present invention has beenillustrated and described it will be apparent to those "skilled in the art that various changes and modifications may be made therein without departing from the spirit of the invention.

I claim:

1. A direct fired heat exchanger for location in a tank of material to be heated and comprising an elongated body member having an apertured end and a closed end, a directional nozzle positioned in the apertured end in communication with said aperture arranged to receive products of combustion introduced into said heat exchanger through said aperture, a tubular baffle positioned in said body member on a common center line with said directional nozzle and'in spaced relation thereto said tubular baffle being relatively smaller than said body member and terminating'inwardly from" the closed end thereof and means for venting the products of combustion from said body member said means being positioned adjacent said apertured end of said elongated body member.

2. The heat exchanger of claim 1 and wherein a discharge orifice in said directional nozzle is of smaller size than said tubular bafi'le whereby a jet-like configuration of the products of combustion directed by said nozzle may be realized.

4. The heat exchanger set forth in claim 1 and.

wherein the closed end of said elongated body member is arcuate in cross sectional configuration 5. The heat exchanger set forth in claii'n1and wherein the elongated member is cylindrical and the tubular baffle is cross 'sectionally circular and the area between the cylindrical body member and the tubular baffle is greater than the diameter of the tubular

Claims

1. A direct fired heat exchanger for location in a tank of material to be heated and comprising an elongated body member having an apertured end and a closed end, a directional nozzle positioned in the apertured end in communication with said aperture arranged to receive products of combustion introduced into said heat exchanger through said aperture, a tubular baffle positioned in said body member on a common center line with said directional nozzle and in spaced relation thereto said tubular baffle being relatively smaller than said body member and terminating inwardly from the closed end thereof and means for venting the products of combustion from said body member said means being positioned adjacent said apertured end of said elongated body member.

2. The heat exchanger of claim 1 and wherein a discharge orifice in said directional nozzle is of smaller size than said tubular baffle whereby a jet-like configuration of the products of combustion directed by said nozzle may be realized.

3. The heat exchanger of claim 1 and wherein said tubular baffle is perforated inwardly from the end thereof oppositely disposed with respect to said directional nozzle.

4. The heat exchanger set forth in claim 1 and wherein the closed end of said eLongated body member is arcuate in cross sectional configuration.

5. The heat exchanger set forth in claim 1 and wherein the elongated body member is cylindrical and the tubular baffle is cross sectionally circular and the area between the cylindrical body member and the tubular baffle is greater than the diameter of the tubular baffle.