US1180440A - Feed-water heater. - Google Patents

Description

V. D. SANDEHS.

FEED WATER HEATER. y APPLICATION FILED MAY 29, I9I5. f 1,180,440.` Y Pt-endfffxpr. 1915. f

V. D. SANDERS.

FEED WATER HEATER.

APPLxc'ATlAoN FILED MAY 29, |9x5.

1,180,440. Patented Apr. 25,1916.

2 SHEETS-SHEET 2.

STATES PATENT OFFICE.

VERNE D. SANDERS, F TULSA, OKLAHOMA, ASSIGNOB. TO ECONOMY WATER HEATER COMPANY, OF TULSA, OKLAHOMA, A CORPORATION.

FEED-WATER HEATER.

Specification of Letters Patent.

' Patented Apr. 25, 1916.

Application led May 29, 1915. Serial No. 31,173.

To all/whom t may concern:

Be it known that I, VERNE D. SANDERS,

.a citizen of the United States, residing at Tulsa, in the county of Tulsa and State of Oklahoma, have invented certain new and `useful improvements in F eed-l/Vater Heaters, of which the followingl is a specification. y

This invention relates to certain new and useful improvements in feed water heaters adapted for use in connection with steam boilers, both of the stationary andlocomo-v tive types.

One object of the invention is to provide a. feed water heater including a heating coil arranged within the Vsmoke box or combus- .tion chamber of the boiler, and through which coil the water passes before it -is introduced into the boiler, andmeans arranged within the line of feed whereby the water may be causedto flow from a source of supply to the coil and from the coil to the boiler; or from the boiler to the coil and thence back to the boiler again, so as to establish a complete circulation to prevent burning .out of the coil in the event of the stoppage of the pump or injector in the feed supply; or whereby, in the event of dev rangement of the coil and its connections, the water mayzbe pumped directly from ,the source of supply l.into the boiler.

` Another object of the invention is to provide a feed water heater of the character describedwherein a vnovel construction and arrangement ,of pipes and valves is employed to secure the desired results and whereby simplicity in both construction and operation and economy of installation with a material saving in the use of fuel will be effected. With these and other objects in View, the invention consists in the features of construction andY combination and arrangement of parts more fully hereinafter described and claimed, reference being' had to the accompanying drawing, in which- Figure 1 is a view in side elevation of `a portion of a steam boiler embodying my invention, portions of the wall of the boiler being broken away to more clearly illustrate the arrangement of parts; Figs. 2 and 8 are diagrammatic views illustrating the several service operations for which the ap paratus is adapted; and Fig. 4 is a View similar to F ig. l, showing a modilication.

Referring now more particularly to the drawings, the numeral 1 designates conventlonally a portion of a steam boiler provided with the usual fire tubes or liues 3 and the Vsmokel box 4. Located within the smoke box el 1s a vertical heatei-.coil 5 formed of a compound bank of tubes, the lower or inlet end 6 of the coil being extended to the exterior and connected bythe union 7 to the inlet or cold water supply pipe 8, which leads to the usual injector orpump (not shown) or other source of force feed supply. The upper or outlet end 9 of the coil also extends exterior-ly and is connected by the union 10 with a return or hot water pipe 11 which extends alongside the boiler and is connected with the water containing space thereof, as indicated at 12. f

Arranged within the pipe 9 is a check valve 13 and a globe or other controlling and cut-ofi' valve 14, said check valve being arranged to open to freely permit flow of the w'ater from the pump or injector to the coil. A controlling and cut-oli' valve 15, similar to the valve 111, is also provided in the return pipe 11. A short pipe section 16, which I tei-ma circulation pipe, is con v circulation pipe is a controlling and cut-ofiI valve 18 similar to the valves 14 and 15, and also'located in 'said pipe is a check "valve 19, which is adapted to open in a. direction toward the boiler and close in a direction tow'ard the cold water supply pipe 8. A lby-pass pipe or conductor() is connected at one end with the pipe 8 at a point between the valves 13 and `14 and is connected with the delivery end of the pipe 11 at a point between the valve 1 5 and the boiler. This pipe 20 is provided with a con trolling and cut-oil valve 21 which is similar `in character to the valves 14, 15 and 18.

In practice, the coil 5 is arranged within the smoke box substantially below the level of the water in the boiler, so as to insure a proper circulation being obtained. In the normal operation of the device, the feed lwater from the. pump or injector is supplied through the pipe 8 to the coil 5, circulates through said coil and is thereby heated and thence passes through the pipe 1l into the water space of the boiler. In this operation 4of the device, as will be seen by reference to Fig. 2, the valve 21 is closed and the valves 1l. 15 and 18 are opened, so that the `water will pass the check valve 13 and flow along the pipe S into the coil and thence through the pipe 11 to the boiler, as before described. It', however, the pump or injector should, stop or the source of supply be otherwise cut ott, as when the engine is not in use and the fire is drawn. the valves 14, 15 and 18 may be closed and the valve 21 opened, whereupon the 'atei' under pressure from the boiler will pass through the pipe 16, openiner the check valve 19 in said pipe and closing the check valve 13 in the pipe 8, and will flow through the delivery end of the pipe S into the coil and through the pipe 11 hack to the boiler, the coil heilig thereby filled from the boiler and prevented from burning out when the lire is again started in the fire box. Furthermore, by closing the valves 14, l5 and 1S and opening the valve 21, as shown iii-Fie'. 3. the How of water through the supply pipe to the coil will be cut oli', as will also commu nication between the coil and the boiler, and the feed water will flow past the check valve 13 and through the by-pass 20 to the delivery end of the pipe 1l between the closed valve ll and the boiler and into the. latter, enabling a direct feed of the water from the source of supply to the boiler to be carried out in the event of stoppage of or damage to the coil orvassociatcd parts of the feed water connections beyond the by-pass pipe.

It will be noted that as the coil 5 is disposed wholly or substantially below the water level in the boiler, I not only insure a' proper circulation but obviate any liability of the coil being! burned out from the heat of the, smoke box, as the coil will be kept constantly full of water in the first two operations set forth, and in the use of the bypass may be protected wholly or to aI large extent unless broken by the presence of a greater or less quantity of water therein. Inaslnuch as the coil is heated from the heat within the. `fire box, no additional heating means is required. and as the feed water iS heated prior to its intrmluction into the 'boiler by what is ordinarily waste heat,` economy in the operation is obviously se, cured. By disconnectinethe unions 7 and 10, the coil may be detached from the service pipes and withdrawn through the door of the fire box for cleaning, renewal or repairs. By

the novel construction and organization ofr parts disclosed it will be seen that an inem pt lve type of feed water heater is provi ud which embodies means for maintain a constant feed of water through the coil and supply of hot water to the boiler,l while at the same time enablingr the course of iiow of the water to be varied for an automatic circulation through the coil in the event of the derangeinent of the water supplying means, or of the direct feed of water from the supplying means to the boiler in the event of derangexnent of the coil, thlis securing safety under all conditions of service.

In the modification shown in Fig. -l the construction is the saine as that previously described, except that the coil is located in the combustion chamber 4 instead of in the fire box, which arrangement may sometimes be used.

I claim as my" invention:

In a feed water heater, the combination with a steam boiler having a` heating chamber, ofa heater located within the heating chamber below the level of the water in the boiler, a water supply pipe connected with the lower inlet end of the heater, a return pipe leadingr from the upper outlet end of the heater to the water space of the boiler, cat-off valves in said pipes, a by-pass pipe connecting said supply and return pipes at a point in advance of the cut-off valves therein and provided with a cnt-off valve, a check valve in the water supply pipe in rear of the by-pass pipe, and a circulation` pipe connected at its upper end with lie boiler below the return pipe and at its lower end with the water supply pipe at a point between the by-pass pipe and the inlet cud of the heater, said circulation pipe being provided with cut-otf and check valves, the controlliner valve in the supply pipe being arranged in the length of said pipe between said bypass and circulation pipes.

In testimony whereof I ailix my signature in presence of two witnesses.

VERNE D, SANINGRS.

Witnesses:

lV. C. lUnninn, FLOYD A. Sannnns.

Images