US1686444A

US1686444A - Triple preheater for boilers

Info

Publication number: US1686444A
Application number: US741073A
Authority: US
Inventors: Lee O Garraway
Original assignee: Individual
Current assignee: Individual
Priority date: 1924-10-01
Filing date: 1924-10-01
Publication date: 1928-10-02
Anticipated expiration: 1945-10-02

Description

o. GARRAWAY TRIPLE PREHEATER FOR BOIL RS Oct. 2, 1928.

Filed Oct. 1, 1924 gvwsmto'a 2 Sheets-Sheet Z. O. Gar/'a'wa y L. o. GARRAWAY TRIPLE PREHEATER FOR BOILERS Filed Oct. 1, 1924 2 Sheets-Sheet 2 L. Garrawa'y Oct. 2 1928.

o I VIIIIIIYIIII I Patented Oct. 2, 1928.

ceerse stars LEE 0. GARE-AWAY, or MEMPHIS, r'nivnnssnn,

trnrrnn PREHEATEIBI ron BOILERS.

' Application med October 1,71924. Serial No. 741 ,073.

pump, and on its way to said device the ex haust steam is made to give up heat to the incoming feed water. This feed water is also heated by the shell or" the boiler against which vthe water conduit is laid and lastly before entering the boiler the wateris conducted by the conduit through a heating flue within the boiler vbefore finally entering; the latter. i

In the accompanying drawings, one em- I I I I this manner preservingthe heat as much as possible in the casing. The p1pe24 contrnbodiment of the invention is illustrated,'and Figure 1' is a sideelevation of a locomotive in partial section; I v Fig. 2 is a section on the line 22 of Fig.

of the heating box or casing through which the feed pipe passes;

Fig. 3, is a section on the line -3 0t Fig, 1, and

F 1g. 4: is a section on the line 4::I4IO' Fig. 1;

[F 5, is a detail sectionof a double check valve which is employed; Fig. 6 is a detail sectionon the line 66 ofFigtli, i In the drawings, the reference numeral it) represents a locomotive of any modern type. The exhaust steam is led from the exhaust nozzle 11 by a pipe 12 which extends upwardly in the smoke box'SO to the shell of which is secured in any approved manner. An opening 40 is provided in the smoke box 30 for the exhaust pipe 12 which opens into a casing 13 which extends along the shell 25 of the boiler. This casingis open on its side nearest the shell 25 of the boiler and is attached in any suitable manner, as by bolts 14,

to the latter so as to form a steamtight connection therewith. At the rear end of the V casing is formed a .pocket 15 from which a pipe 16 is adapted to conduct the steam from the casing to aninjector 1'Z'. The injector shown conventionally on the drawings is of the lifting type, but it is evident that-any other device, such as a pump, may be used posed in the exhaust steam pipe 16-.

for feeding the water into the boiler. The injectorfhas the usual live steam intalrej18, overflow pipe 35 anda cold-teed Waterpipe 19 with the usual valve 20 for admittingthe' water to the injector, and a valve Ql'is dis- I This valve 21 is open when the injector is in oper' ation in 0rd at to admit exhaust steam and c'on densate i romfthe heater 18 into the injector I adjacent the outlet thereof. @When the latter is not working, the valve 21 is lrept closed'to prevent exhaust steam and condensate lro'm entering the injector.

' The reference numeral 22 represents'a pipe provided withthe usual boiler check valve 23. This pipe leads from the outlet of the in ector and proceeds, asat- 24:, through the casing'18, I The casing is very shallomas I best seen in lligure 3, so thatthe portion2 1 the pipe Wlll he close against the shell 25 ot' the boiler. The casing; isinserte'd-under anasbestos lining 16 ands jacket 47 which I usually cover the exterior. of the boiler, in

ues to the -forward end of the casing where it makes ashort loop and runs'out from the casmg in a' downward dire'ctionto a double" 'bOlll" check valve 26.

30 in the usual manner. The pipe then contumors in an outward direction through the shell oat-the smoke box 30, as at 32, and terminates with an intake 31 on'the side of the vboiler and communicating with the Water I It will now be evident that the -teed water after leaving the in ector space of the same.

passes through the casing 13, thence proceedfore enteringthe boiler at 31. l/Vhile the check valve 26 in itself forms no part of my invention and maybe of anyknown-or approved construction, I have shown in Figs. 1 The 5and 6 a valve which I prefer to use. valve casing 50 is rigidly secured upon the boiler shell and s provided 111 lts upper part with a port 51 alininq' with a passage through the boiler shell whereby to establish communication with the Wat'er space of the boiler. At its outer end, the port 51 opens into a chamber 52 in the valve casing and in the bottom of said chamber is a, downwardly flared port 53 forming a seat for the upper end of the double valve body 54 which is'of circular cross section and tapered from its middle to both ends, and is freely movable-between the ported bottom of the chamberbQ and a web 55 forming a partition between the

pipes

24 and 27. An upwardly flared port 56 in the partition in vertical alinement with the port 53 forms a seat for the lower end of the valve lVlien' the injector is-working, the water forced through thepipe 24 lifts thevalve 54 to the seat 58 and thereby cuts off flow through the port 51 from the boiler, and it will be evident that the feed water is forced through the

pipes

27 and 37 into the boiler at the intake 31 Vhen the injector is not working, the valve seats in the port 56 and local water circulation thentakes place from the water space of the boiler through the pipes Q'Tand 8 7 into the boiler through the intake 31, burning of the'pipes being thereby avoided.

The exhaust steam before leaving the easing 13 is made to pass through oil separators 3iplaced upon ledges 33 in the pocket 15.

The operation of the device is as follows.

I The exhaust steam is taken through the pipe 12 into the casing 13 and, when the injector is inoperation, passes through the oil separatin dei' ice'sin the pocket 15 and continues purified through the pipe 16 into the injector 17 where it condenses when meeting the water passing through the injector, the feed water being thereby heated and the condens sate being comminglejd with the water to again pass through the system. This forms the first heating stage. Thispartly heated water is then forced through the check valve 23 and the pipe 22. Upon entering the easing 13 through the pipe 2%, the preliminarily heated water will be further heated by the exhaust steam freely circulating around the pipe and by the heat rising from the boiler shell.

This accordingly forms the second stage of theheater. The thus heated water v then passes through the downward continua shell of the boiler, then into the smoke box of the boiler, then back and forth within a boiler flue and thence into the frontendof the boiler, a casing upon the boiler shell housing the portion of the water conduit lying on said shell, a pipe extending from I the steam exhaust of the locomotive engine's through the smoke box into the front end of said casing, and means for conveying ex hauststeam from the rear end of the Cas ing and delivering it into the water conduit I at the source of supply in rear of the casing;

2. A feed water heater system for income tires consisting of a continuous water con duit extendinglongitudinally upon the shell of the locomotive boiler to a point near the front end thereof, then downwardly to a point on. theside of the locomotive smoke box and then back and forth. within the smoke box and a flue of the boiler, the t'er-' minal of said conduit entering the boiler, a heat insulated casing secured upon the shell of the boiler over the longitudinalportion of the water conduit resting thereon, pipe rising from the exhaust steam outlet of the locomotive engine through the smoke box into the front end of the casing, a pocket at therear end of the casing, a water-forcing device to the rear of the casing, and a pipe leading exhaust steam from the pocket of the casin into the water-forcing device at the '3 water outlet passage ofthe same.

In testimony whereof I aflix mysignature.

LEE 0. GARRAWAY. [L. s.-]