US1657771A - Hot-water and steam heat economizer for furnaces - Google Patents

Description

Jam 3T, 1928. 1,657,771

L. D. SUMMERS HOT WATER AND STEAM HEAT ECONONIZERTOR FURNACES Filed May 13, 1927 3 Sheets-Sheet l MUM-8W5 INVENTOR.

z BY

II ATTORNEYS.

I Jan. 31, 1928. 1,657,771

L. D. SUMMERS HOT WATER AND STEAM HEAT ECONOMIZER FOR FURNAOES I Filed May 13, 1927 3 Sheets-Sheet 2 HGZZ MIWAJ'ESZ' I INVENTOR.

X BY 2. M

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L. D. SUMMERS HOT WATER AND STEAM HEAT ECONOMIZER FOR FURNACES Filed May 13, 1927 3 Sheets-Sheet 5 WITNESSESx- I6" 6 mars-M012. K BY 2 a Z M %0% Patented Jan. 31, 1928.

Louis. 1;. SUMM.ERS, 0.x". sgmaermnn ILLINOIS, sslenos m We A D PMMEE orv SPIELIINGEIELD, ILL N S. QN ISTIN .1T F ED l EBAN WIIa IAM IRQNZ Ann Louis D. snlamnns.

nor-warn Ann STEAM inner nconoiurznn non t m ns;

Application filed. ma 13,

My invention relates to a class of heat economizers adapted to be operated on the counterflow principle and be operatively connected with a furnace particularly of the hot Wat-eror steam type; an object being in this device particularly to secure by" mea ns of its novelconstruction and operative relation to a furnace to which it is adapted to be connected; a' maximum of benefit from the heated products of combustion normally passing out of the furnace flue as Wasted heat. i

A further object of this invention is to provide additional heating surface as Well as to provide an economizer for operative connection with a furnace that will temporarily retain the products of combustion ema nating from the furnace ithin a chamber for their accommodation through which a series of hot Water pipes extend in accommodatin the passage of cooler Water from a lower water chamber to an upper hot water, or steam chamber as it becomes quickly heated in passingthrough the pipes.

here low'pressure steam heat is desired a suitable Water level may be, of course, maintained thus providing in the upper head of the economizer a super-heating steam chamber.

A further object of my invention is to provide a hot Water and steam heat econominer for furnaces to be used preferably with oil or gas burning furnaces and. the like and such as Willbe adapted to take advantage of the control of the inoven'ient of the products of combustion normally passingout of a furnace flue as wasted heat; and in this economizerl have for a further objectto so control the movement of gases emanating from a furnace as to makeit possible to most effectively transfer the greatest possible percentage of heat of the gases to the circulating Waterpassing.through the water heads'and tubes of the economizer during the process of heat transfer while the products of combustion are still at their highest temperature; While in the meantime I provide in a heating operation means for prolongingthe time [during which the hot gases will continue tofheat the ater circulating through the hot water tubes. extending through the gas chamber.

My invention embodies a design and construction of hot ivater and steam heat econo- 1927. Serial No. 191,056.

mixers that is adapted tobe made of metallic parts such as sheetiron and the like to-' gether with such other details of construe tlon and arrangement as will combine the merits of strength andrelatio'n of parts for i this. purpose.

The intended novel features of construction and design of my device will be hereinafter more fully described in'the annexed specifications, recited in the claims, and

illustrated inythe accompanying drawings 1n which like reference numeralsindicate like parts in the several figures.

Referring to the figures:

1. isa side elevation of the hot water and steam heat economlzer ofmy invention illustrating the manner invvhich the same is'connected Witha hot Water. and stealn furnace and in this figure both the hot water connections and cold Water connections as Well as the connections for the hot products of combustion are disclosed.

Fig. 2. 1s a side elevation of the. heat economizer of my invention shown detached from the furnace with which it is normally connected. 1 Fig. 3.

disclosing, by a cut-away, the details of the economizers construction. I

Figl 5..'i,s a vertical section lM-rM Fig. 2. of the economizer. i I i Fig. 6. 'is a horizontal cross section N,N Fig. 2. exposing tovienrapossible arrangement of the hot, Water tubes. in their space relation. p v 1 y r I The preferred embodiment of my: invention: and the method of securing the desired results. therewith will now be pointed; out as referenceslare made to the several nnmerals in the respective figures'illustrating the device of my invention. v i 1 1 Among other successful arrangements by which intended resultsmayibe secured with the hot water. and steam heat economizer of 'my inventionis an arrangement illustrated is a side elevation of the heat BCOIlOlTllZGIjOIl. my invention shown with the nected with a hot water furnace -2 by both hot water and hot gas connections.

A particular merit of my invention may be observed in the fact that flue pipe 3 of hot water and steam furnace 2- connects directly with the upper area of the gas chamber of the economizer 1- to which it carries the heated products of combustion from hot water and steam furnace 2 where the hot gases come into gas chamber -1()- (see Fig. 4) through line pipe ,3-- coming into forceful contact with hotwater pipes l1 where the hot gases thus strike hot water pipes 1lat a point near the top of the pipes just before the hot water within the pipes would rise into upper hotwater chamber 12- just before the water leaves the upper chamber through pipe -6 to join with the hot water in pipe 7 (see Fig. l) before circulating out over the hot water heating system.

In this manner itwill be seen that the hot gases reaching chamber 10 from the hot water furnace 2 through flue pipe -3 reach this chamber when said gases are approximately at their highest temperature just where the hottest application may be most eli'ectively applied to the heating water rising in the pipes just before the water or steam therefrom is ready to be distributed throughout the heating system.

Every hot water system has a cold water return in the circulating system adapted to return the water after it is cooled to the lower portion of the boiler. This return pipe is not shown in Fig. l but a cold water pipe connects the lower area of the boiler in furnace 2 with lower water chamber -13 through which the cold water entering the economizer through drum 9 forming chamber 13- rises through hot water tubes 11-. with an accelerating velocity until it reaches upper chamber 12 from which it is distributed through pipe --7 of the hot water furnace.

To those skilled in the art to which this economizer pertains it will be observed that this novel and eflicient as well as speedy method of heating and distributing water or steam in this manner is accomplished in the following way: lVhen the gases from flue pipe -3 forcibly enter chamber accommodating the heated products of combustion they enter the upper area thereof and can only move in one direction upon entering this chamber'and that is downward; and move downward through heat stratification; and by actual test it has been shown that while these gases are settling downward in the gas chamber they gradually give up a great percentage of their heat before passing out of pipe 4- to the chimney.

It will therefore be seen that while the gases through this process are gradually settling to a lower level in the economizer and giving up their heat as they settle and also settling because they are giving up their heat and getting cooler, that the water in the meantime entering in bottom chamber -l3- gets its first application of heat as it reaches the level of the bottom of the gas chamber of the economizer where the gases are at their lowest temlierature; and then as the water rises in the tubes to the level of the hotter gases it reaches the hottest point at the top entering the hot water dome --l2 before leaving the economizer as hot water or steam.

Attention is called to Fig. 3 which exposes to view the upper and lower water chambers and their connecting water tubes. This is shown by the removal of jacket 1 which when secured into operative position forms the gas chamber about pipes 11-. This jacket is detachably secured into place normally by bolts 15.

in a careful study of the details of structure of my economizer those who are skilled in the heating art will observe a novel arrangement of details of construction of my econiniizer which make it possible to secure therewith new and novel results.

in this connection attention is directed to the manner in which jacket -lis adapted to be detachably secured about the periphery of the upper and lower heads 8 and 9 of the economizer thus to provide an expansible detachable closure member forming a gas chamber for the econonnzer.

'lo heating engineers it will be evident that when the hot products of combustion emanating from the furnace are admitttcd into the gas chamber 10 of the economixer that these gases commonly range from two or three hundred degrees to a thousand or more degrees of temperature while at the same time the tubes and water chambers would not carry such a high temperature when they containwater or steam perhaps up to 250 and the differential in temperature obtaining within the economizer would cause a decided ex iiansion of jacket -1- under such conditions when this jacket forms the gas chamber since this jacket does not come in contact with the water within the economizcr.

It is therefore evident that when this outside jacket does expand lengthwise or otherwise that if this jacket was riveted or bolted to the heads --8 and 9 and then expended when forming the gas chamber with such high gas temperatures that the strain of the expanding jacket would cause the tubes -11- to pull out of the upper or lower heads to which they are attached; but in my economizer I detachably secure jacket -l about the upper and lower heads -8- and -9- in such a way as will permit the [Ill lul

details is illustrated in the drawings forming a part of this specification.

-llaving thus described the nature of my invention what I claim as new and useful and desire to secure by Letters Patent is:

1. A hot water and steam heat economizer adapted to be spaced from and operatively connected with an oil or gas burning hot,

water or steam furnace, comprising an upper and a lower water head connected by a plurality of communicating upright water tubes; said heads having a horizontal diameter in excess of the diameter of the horiaontal cross sectional plane enclosing the tubes; a detachable metallic jacket engaging and encompassing said upper and lower heads of the economizer forming a gas chamher for the economizer and adapted to slidably move when expanding longitudinally upon the outer walls of said heads; said gas chamber provided with an upper wall opening in the expanding jacket adapted to be connnunicatively connected with the flue gases from a furnace and said chamber further provided with a lower wall opening in the outlet flue; said lower Water head adapted to be communicatively connected with the cold water level of a hot water and steam heat furnace and said upper water or steam head adapted to be communicatively connected with the hot water or steam level of a hot water and steam heating furnace.

2. A hot water and steam heat economizer of the character described adapted to be 019- eratively connected with an oil or gas burning hot water and steam heatingfurnace comprising in combination a lower cold water head having a bottom opening adapted to admit cold water from a boiler; a.

spaced upper hot water and steam head having a central opening to discharge hot water and steam and adapted to be communicatively connected with a hot water and steam lead pipe from a "l'urnace; sald heads of the econoniizer communicatively connected by a plurality of upright spaced water tubes; an

upright metallic detachable casing encom-' passing and loosely engaging said upper and lower heads forming a gas chamber between said heads;'said casing adapted to slidably move on said heads when expanded by heat and provided with an upper inlet wall opening for hot products of combustion adapted to be operatively connected with a "furnace flue; said 'asing further provided with a lower outlet wall opening adapted to establish outlet communication with a house flue for said gases after giving up a portion of their heat to said water tubes within said gas chamber.

In Witness whereof, I hereby set my hand this 9th day of May 1927 A. ,D.

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