US2457022A

US2457022A - Preheating apparatus

Info

Publication number: US2457022A
Application number: US626035A
Authority: US
Inventors: Henry F Yula
Original assignee: Individual
Current assignee: Individual
Priority date: 1945-11-01
Filing date: 1945-11-01
Publication date: 1948-12-21
Anticipated expiration: 1965-12-21

Description

Dec. 21, 1948. H F YULA 2,457,022

PREHEAT'ING APPARATUS Filed Nov. l, 1945 4 Sheets-Sheet l 23., f w' 1 I f I I Finn-Ea .4 2.

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Dec. 21, 1948. H. F. YULA PREHEATING APPARATUS 4 Sheets-Sheetv 2 Filed NOV. 1, 1945 INVENToR. l

Yzmd. WPW/ Dec. 21, ,1948. H, F, YULA 2,457,022

PREHEATING APPARATUS Filed Nov. 1, 1945 4 sheets-sheet' s FE1- Eg 'I lINI/NTOR. i

By fwzrf. YUM. i M+@ Dec. 21, 1948. H. F..YU| A I PREHEATING APPARATUS 4 Sheets-Sheet 4 Filed Nov. 1, 1945 INVENTOR. wy? YUM BY MVM TTogfvzfXs,

Patented lBec. 21, 1948 UNITED STATES PATENT "OFFICE PREHETING APPARATUS vi-lenry F. Yiiia, New YorkyN. Y. Application November 1, 1945,' S'erial No.`626,"'035 (Cl. 25T- 239) 2 Claims. l

This invention relates to apparatus for heating liquids and while not limited thereto the same has particular reference to an apparatus for preheating fuel oil for rendering the same relatively mobile when fed to the burner.

In the preheating of fuel oil for oil burners and the like, it has been the practice to conduct the fuel oil through coils arranged in a container connected in a bypass with the water chamber of the boiler. Such construction has the disadvantage that in the event of rupture of 'any one 4of the coils the fuel oil escapes into the by pass and is carried by the iluid therein 'to the water chamber of the boiler and thence throughout the heating system and the radiators. The present invention has in View an apparatus for preheating fuel oil which overcomes the afore said objections and avoids the possibility of damage resulting to the heating system by rupture of the coils and renders the use of the apparatus safe for all installations.

The invention further comprehends a preheating apparatus of the indicated character in which the heat is transmitted to the fuel oil by means of a circulating liquid separated from a heating fluid and maintained at a substantially constant predetermined temperature by continued. motion of the heating fluid.

The invention also has for an object the provision of means for Venting the circulating liquid container and for taking up expansion in the container and in the liquid.

""With lthe foregoing and other objects in 'view reference is now made to the following specification and accompanying drawings in which is .1llustrated the preferred embodiment of the 'invention.

In the drawings:

Fig. l is a longitudinal vertical sectional View of a preheating apparatus constructed in accordance with the invention and diagrammatically illustrating two of the tubes only.

Fig. `2 is an venlarged outer face view of the outer head thereof.

Fig. 3 is an enlarged inner face View of .the outer head thereof.

Fig. 4 is a face View of the intermediate head showing one arrangement of the tubes.

Fig. 5 is an enlarged fragmentary vertical sectional view through the forward portion of the apparatus.

Fig. 6 is a perspective view of the intermediate head and the tubes connected thereto.

Fig. 7 is an inner face View of a modied form of outer head.

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Fig. 8 is an outer "face 'view thereof.

Fig. 9 is an inner face vie'w of the modified form of intermediate head.

Fig. V10 is a 'fragmentary top 'plan View of the modified outer head.

Referring to the kdrai'yihgs iby characters of reference the apparatus includes an outer casing or 'shell I0 preferably fashioned from vsteel and including a :cylindrical Wall Il 'closed at one end by a rear wall 'I2 and having an inturned annular head I3 Welded `o1" otherwise secured t0 the cylindrical wall Il at 'the yforward `end thereof. n y

Located coaxially within 4the casing or shell I'U is a container i4 preferably constructed of Acopper or other nonecorrosivemet'al and which consists of a cylindrical wall l5 having a closed end lI6 and formed at its "opposite end with 'an outwardly directed annular flange I'l. The container I4 protrudes through the'head f3 with the flange H thereof` loca-'ted `between the head I3 and an intermediate circular 'head "I8, The circular head I8 is formed with a plurality 'of vapertures I9 in which apertures :are secured the outer open ends of U-shaped tubes v2l)y which extend into the container `Il! with the v'bight portion 2l thereof con.- nect'ing the opposite longitudinal legs V22 and 23 of the tubes located adjacent the inner end of the container. As illustrated, the apertures i9 are thirtyesix in "number to receive therein eighteen of 'the Atubes 2.0. The apertures I9 are arranged in quadrantly spaced groups the upper and lower groups each consisting of six apertures while the groups at the opposite sides each consist of twelve apertures. The apertures in the uppermost group have secured therein the open ends of the upper legs vof siii tubes 20 while the open ends of the lower legs thereof are secured in the six intermediate ,apertures in the group at the left side thereof. 1The ,sigx remaining apertures in said latter Igroup 4have secured therein the open yends of vthe legs of six other tubes 20 While the open ends of the opposite legs lthereof are Secured in .the Corresponding apertures I9.

in the .group (at the pps'ite side thereof. Th remaining ya"perturesI9 'in ,the latter group similai-1 5" have vsecured ,there the" open ends of the upper legs 'of six' .additional tubes '20 with the open 'ends' of the lower legs thereof secured in the lowermost y group of apertures'.

An outer head 241s proiided which is disposed in covering relation' with the outer face ,of the intermediate head J|18 and secured thereto by bolts 2,5 .extending .through openings in an outwardly directed flange '2 6 thereof and through aligned openings in the intermediate head I8 and the flange I I of the container I4 with the threaded inner ends of the bolt 25 anchored in threaded openings 21 in the head I3, thus clamping the flange of the container I4 between the heads I3 and I8 and securing the container I4 within the casing or shell I0. Gaskets may be provided if desired between adjacent faces of the said heads and between the opposite faces of the ilange I'I and the adjacent heads for providing liquid tight joints. v I

The outer head 24 includes a cylindrical wall 28 projecting forwardly from the flange Z5 thereof, the forward end of which is closed by a wall 29 provided with threaded inletl and outlet openings 30 and 3l therethrough which areadapted to be connected by piping 32 with a fuel pump and fuel tank (not shown) and by piping 33'with the fuel oil inlet of the oil burner. The head 24 `is of hollow formation and is formed with crossribs 34 which intersect medially of the head and subdivide the Yhollow interior thereof into quadrantly spacedrecesses 35, 36, 3l and 33 respectively opening throughthe inner face of the said head and overlying and separating the quadrant groups of apertures I9 in the intermediate head I8.

The apparatus isl adapted lto be arranged in a by-pass pipeline connected with the water charnber of the heater and for this purpose the casing or shell II) is provided with an inlet opening 39 at the top thereof adjacent the forward end which is provided with an interiorly threaded tubular boss 40 for receiving therein the inlet pipe 4I of said by-pass pipeline connected at the upper end with the water chamber of the heater somewhat below the level of the water therein. The said casing or shell I is also provided with an outlet opening 42 at the bottom thereof adjacent the rear of the shell' and which opening is surrounded by an interiorly threaded tubular boss 43 for receiving therein the outlet pipe 44 of said by-pass pipeline connected at the lower end `thereof with the water chamber of the heater adjacent the bottom. By this construction the heated water in the heater is circulated through the casing or shell I0 between the same Vand the container therein and returned to the water chamber of the heater. j

The container I4 is also filled with water or other liquid in surrounding'relation with the tubes 2l] which are heated bythe circulating water in the casing or shell I0 and convey the heat to the fuel oil circulating through the tubes to render the same relatively mobile or fluid for atomizing and burning' when conducted to the oil burner.

' In order to provide means for taking upvthe expansion in the water or other liquid in the container I4, an expansion tank 45 is provided which as illustrated in detail in Fig. 5 of the drawings is secured by the piping 41 in the threaded opening 48 in the intermediate' head I8. The inner end of the piping 41 is spaced from'the bottom of the threaded aperture 48 and aireduced pas-v sageway 49 extends inwardly from the bottom of said threaded aperture and opens laterally into the interior of the container I4. A tube 50 is threadedly engaged in the upper end of said pas-v ally into the interior of the container I4.A The piping 41 has a branch pipe 52 connected thereto which leads to and is connected with a passageway 53 extending into the bottom of the intermediate head I8 and opening through the inner face thereof into the container I4. A longitudinally extending pipe 54 is connected to the inner end of said passageway 53 with the open end of said pipe being located adjacent the rear of the said container.

The container I4 is adapted to be lled with the water or other liquid through a valve 46 connecting with the expansion tank which is maintained in a partially filled condition in order to insure that the container I4 is filled with the liquid, the expansion tank being provided with a gauge glass 56 for determining the height of the liquid therein. The liquid in the expansion tank 45 is admitted to the container I4 through the piping 47 and thence through the passageway 5I. When the container i4 is being filled with the liquid the air therein is vented through the passageway 49 and tube 50 to the top of the expansion tank where it is exhausted to the atmosphere. The piping 41 being connected by the branch pipe 52, passageway 53 and pipe 54 with the bottom of the container I4 permits of the circulation of the liquid through the container and about the tubes 20. This is due to the fact that the liquid in the container will rise as the same becomesv heated and" will ow upwardly through the passageway 5I and thence through the piping ll-I and branch pipe 52 and will be returned to the container through the pipe 54. The liquid thus circulating in the container will effectively heat the fuel oil passing through the tubes 24 so as to maintain the fuel in a mobile or fluid condition whereby it may be more readily atomized by the oil burner. The container I4 is slidably supported at the rear upon a saddle 51 secured to the rear wall of the shell Ill in order to permit of the expansion and contraction of the container.

The expansion tank 45 is provided with a selfsealing pressure relief valve 58 in the top thereof which may be set at any desired pressure such as 100 to 150 pounds so that the same will open to relieve the pressure Within the container I4 should the pressure therein exceed the pressure set on the said relief valve 58. The outer head 24 is provided with a relief valve 59 in the cylindrical wall 28 thereof which is adapted to be set so as to relieve the pressure in the fuel oil entering through the inlet opening 30 should the pressure therein exceed the pressure sety on the said relief valve. The branch pipe 52 is provided with ya drainage opening in communication with the passageway 53 in order to drain the liquid from the container I4 through the pipe 54, the said drainage opening being normally closed by a screw plug 60.

The apparatus is supported in any desired manner in elevated position above a supporting surface in order to permit of the connection of the inlet and outlet openings 39 and 42 in the by-pass pipeline with the water chamber of the heater. For this purpose the shell or casing Ill is supported upon any desired supporting surface by means of flanged pipe standards 6I secured at their upper ends to couplings which are welded or otherwise secured to the under side thereof.

In Figs. '7 to 10 inclusive of the drawings a modified form of intermediate and outer heads 62 and 63 is illustrated which are constructed so as to provide for a relatively greater travel of the fuel oil through the tubes or coils and consedntl'y a greater V'li'irri-ber' 0T times that 'the fuel oil traverses the len-'g-th of the container 5M.

"flhe intermediate head 62 is "provided with a plural-ity fof apertures -G'l opening through the opposite faces thereof which are arranged on circles concentric with the y'head Hand have secured therein the open 7ends ci the tubes 20 as in the previous form. "The outer head 63 'consists Vof `a cylindrical wall v"E55 closed at `the louter `end thereof by an -e'nd wall te and having 'an cute/'ardly projecting peripheral 'flange at the opposite 'end thereof secured inY 'covering relation upon the intermediate head 52 Aby vbolts such as the bolts 25 extending through openings 68 in said ange and through openings I69 in the intermediate head`'2 with the inner endsjof the bolts anchored in the threaded 'openings 21 in the head 13.

The 'outer wall BB of the outer `headGi-i is providedwi'th threaded fuel cil inlet andoutlet ports 'I0 and il which 'open into the hollow interior of the head. The "said 'head is Aformed with interconnected partitions Which sub-dividethe hollow interior thereof into a plurality of recesses or pockets which are arranged in overlying relation with "and close the 'open vends of the tubes or coils 2t.

As illustrated in Fig. '7 of the drawings the inlet port T0 "opens into a recess dened by partitions l2 and 'i3 extending radially inward from the cylindrical wall '65 and connected at the inner end thereof with "an v1iii-terfl'ee'diate wall 14, the said walls thus enclosing the openend-of one of the legs of the tube 26 @located Tin `@the aperture 64d. The opposite leg of said tube is located in the opening designated 64b which opens into a recess in `the'outer hea'd63 'defined by the parti tion I3 and a partition 'l5 -extending inwardl;l from the'cylindrical'wa'llt5 and which partitions connect at their `inner end with an intermediate Wall 'le which recess closes the open end of said tube and one of the legs of the tube located in the aperture 64o. rIhe opposite leg of said tube is located in the aperture 64d which leg opens into the recess defined by the partition 'l5 and an angulated partition l? which are connected at their inner end with an intermediate wall 'i8 and which recess closes the open end of said tube and one of the legs of a tube located in the aperture 64e of said intermediate head 62. The

opposite leg of said tube is located in the aperture 64j which opens into a recess defined by the angulated partition 'Il and a similar partition 79 extending radially inward from the cylindrical wall d5. The said recess closes the open end of said tube and the open end of a leg of one of the tubes 2t located in an aperture 64g in the intermediate head 62 with the opposite leg of said tube located in the aperture 64h which latter leg opens into a recess defined by said partition 19, a portion of the partition '11, an angulated partition 80 and an intermediate wall 8|. The said recess closes the leg of said tube and also one of the legs of a tube located in the aperture 647 of the intermediate head 62. The opposite leg of said tube is located in the aperture 64k and opens into a recess defined by said angulated partition 80 and a partition 82 extending radially inward from the cylindrical wall 65 and which partitions are joined by an intermediate Wall 83. The said recess closes the open end of said leg and also the open end of a leg located in the aperture 64m in the intermediate head 62. The op posite leg of said tube is located in the aperture 641i in the head 62 which opens into a recess defined by the intermediate walls 8| and 83 and intermediate walls 184 :and 85. The said recess closes 'the open end "of said leg and also ycloses the open end of a `leg of fone of the 'tubes 20 located the aperture fll'p. "The opposite leg of said latter tube being located inthe aperture `l'llq in the 'intermediate lhead -62 and opens into a recess defined by :said partition '8E and an angul-ated partitiont which partitions are connected at their inner ends vby the intermediate Wall Y'8"3, the said recess closes `ysaid -leg and also closes one of the Ilegs of another one of the tubes l2) which leg is Ilocated inth'epeningrdesignatedldr. y-Fhe opposite leg fof said -last mentioned vtube is located in an aperture [Sits yin the intermediate he'a'd 563 and =`opens into a recess defined by the partition 8f3 and "an vangulated partition 8i which are jconne'ted `by the intermediate vwall "85. The said recess closes said last ymentioned leg and also closes the open end of a leg'olone-of said tubes 20 located 'in r`the aperture 2'E 4t 4the opposite 5leg 4of said tubelbei-nglocated in the'ap'erture 'Situ which opens Tinto a recess defined by said partition 91 andan :angula'ted partition l'83.

rThe aforesaid arrangement of 'partitions yand tubes -is 'similar lin construction 'for the opposite half ef the intermediate "hea-"d '-652 --and Jthe outer head iii tothus define Ia centinuous passageway for Athe fuel oil entering through lthe orifice 'lili and thence through 'each'o'f the tubes -2 `and-out throughth'e leg'of one of thetuloes 1located-inthe aperture'designatedfliu and Athence through the tubes inthe 'said-opposite 'half of -theinterinediate head E2 `and `throughfiioand through lthe outlet port fil *te theoil burner. 'The intermediate head is lsimilarly provided with a threaded opening :it for connecting `the expansion tank `l45 thereto asin the previous form andatthe bottom thereof the y:said `head is 4provided Awith the passageway 53 similar to the previous form.

In 'use and operation `the heated water in 'the Water chamberof "the heater 'is circulated bythe by-pass pipeline through the casing lil between the same and the container M therein so as to heat the liquid within the container I4 which surrounds the tubes or coils 20. The liquid Within the container ifi being heated by the water circulating 'through the casing il) transmits its heat to the fuel oil circulating through the tubes or coils 20 so as to render the fuel oil relatively mobile whereby the same will be more readily atomized and burned by the fuel oil burner. Any expansion in the liquid within the container I4 will flow upward into the expansion tank 15 so as to avoid excessive pressure in the container lll. The upward flow of the heated liquid therein will also cause a circulation thereof through the branch pipe 52 and return to the container through the pipe Eli so as to produce a circulation thereof about the tubes or coils 2. When not in use the coils 20 may be drained through a pipeline (not shown) leading to the fuel oil tank which pipeline is secured in a threaded opening 89 in the head @i3 the same being normally closed by a valve and adapted to be opened when the tubes 20 are to be drained.

What is claimed is:

l. In an apparatus for preheating fuel oil for rendering the same relatively fluid when fed to a fuel oil burner, an outer casing, a container located within said casing in spaced relation to the walls thereof, a head secured to said casing in closing relation with one end oi said container and formed with a plurality of apertures opening through the opposite faces thereof, a plurality of U shaped coils disposed within said container having open ends secured in said apertures 'in said head, an outer head secured upon said rst named head and having ribs providing a plurality of recesses between said inner and outer heads, said outer head having an inlet opening into one of said recesses and an outlet opening into another of said recesses, at least one o said coils having an open end opening through said inner head into said recess having the inlet opening and at least one of said coils having an open end opening through said inner head into said recess having the outlet opening and at least two of the remaining coils each having an open end opening through said inner head into the remaining recesses for admitting fuel to said coils for circulating the same therethrough and through said recesses, an expansion tank, said first named head mounting said expansion tank and having means establishing communication between said expansion tank and said container for Venting said container through said expansion tank, said container and expansion tank being adapted to contain a fluid for circulation about the coils, said casing having inlet and outlet openings adapted to` be connected with a source of heated uid for circulation thereof between said casing and said container for heating the fluid in said container and a conduit connected with the container at the top and bottom thereof for permitting or" the circulation of the fluid in the container for heating the fuel oil in the coils.

2. In an apparatus of the indicated character, an outer casing, a container located Within said casing in spaced relation to the walls thereof, a head closing said container and formed with a plurality of apertures opening through the opposite faces thereof, a plurality of groups of coils disposed within said container having open ends secured in said apertures, an outer head secured upon said rst named head and having ribs providing a plurality of recesses between said inner and outer heads, said outer head having an inlet opening into one of said recesses and an outlet opening into another of said recesses, said groups of coils having their open ends opening through said inner head into said recesses to thereby provide for the circulation of a uid from the inlet opening successively through said groups of coils, an expansion tank, said first named head mounting said expansion tank and having means establishing communication between said expansion tank and said container, a pipe connected With said rst named head in communication with said container and extending upwardly through said expansion tank with the open end thereof located adjacent the top of the expansion tank for venting said container, said container and expansion tank being adapted to contain a fluid for circulation about the coils, said casing having inlet and outlet openings adapted to be connected with a source of heated fluid for circulation thereof between said casing and said container for heating the uid in said container and a conduit connected to and establishing communication with the container at the top and bottom thereof adjacent thn opposite ends for permitting of the circulation of the fluid in the container for heating the liquid in the coils.

HENRY F. YULA.

REFERENCES CITED The following references are of record in the die of this patent:

UNITED STATES PATENTS Number Name Date 1,738,848 Starr Dec. 10, 1929 2,056,920 Demann Oct. 6, 1936 2,360,094 Arvins et al Oct. 10, 1944 2,360,408 Dunn et al. Oct. 17, 1944 2,396,235 Arvins et al. Mar. l2, 1946