US1928085A - Boiler feedwater heater - Google Patents

Description

Sept. 26, 1933. J. N. WY'NDHAM Er AL 1,928,085

BOILER FEED WATER HEATER Filed Sept. 30, 1932 1/4 74 VII Fig.1.

A ttorney 'Patentedi Septf 26, 1933 I' UNv BOILER FEEDWATER HEATER;

' I. I James "s wbywy'nd j Leyshon Wyndham,

. e [Application ,sepfemb 635,634, andin'Grea the casing is utilized tolset up a return flow through the auxiliary. conduit.

According to the present inventi on the feedwater inlet is lccateddirectly in the auxiliary conduit for inducing acirculation therethrough :and along the lower or heating chamber within the casing. The feedwater inlet in the auxiliary conduit includes, or may include, a nozzle for directing'the entering water.

'Defiecting m passage of lesser heated wate outlet may be provided. I

I Live steam nozzles may tially midway in the auxil 251 purpose of heating the wat prior to the firing thereof. i

' A feedwater heater embodying the features of the invention positively assures circulation ofthe lesser heated water through the conduit and prevents cold water from entering the feed, outlet connection.

One embodiment to the present invention is illustrated, by way of example, on the accompanying drawing wherein Fig.1 is a sectional elevation and Fig. 2 isan end elevation.

The heater comprises a horizontally arranged casing 1 consisting of a tubular metal casting with the auxiliary conduit 2 formed in the wall thereof. One end of this casing is 010 cover plate 3 and the other end by aplate 4 into which return bend steam. or'otherwise secured, a steam 6 being fitted over this tube p 1 steam inlet port '7 and a steam outlet port 8, the

ports being separated by a partition 9.

Opening into the conduit 2 towards the tube plate end thereof is a feedwater inlet 10 which includes a nozzle 11 by which the entering water is turned substantially into the line of the conduit. A deflector plate 12 is secured to the tube plate 5 and lies in a horizontal position between ans for preventing the direct r to the jeedwat'er heater accordih distributing chest the inlet and outlet limbs of the steam tubes-5, this plate being slightly concave downwards at 13 opposite the nozzle 11 to provide a partly stream 30; 1932,? serial i so" i remai s. ifwresvzss f the invention set s and l ims. t e .ccm-

er to the boiler,.means ircuit with the casing,- and means-whereby theieedwater admitted to part, of the main conduit also be fitted substaniary conduit for the er in a boiler or boilers of the 1 improved feedviater sed by a 1 tubes 5 are expanded late 5 and having a ham, :Cardim and Stephen, I

Croe'svaen, 'nearQCardifi, t

a a Wit e -$1931.

lined-path .or thewater leaving the conduit 2' and passing along-the lower partl5 of uthe heating chamber, 1. Thepfeedwatergoutletl l extends from the upper. part 1610f, thejrheatinglchamber substantiallyzopposite theinlet. :1;-

1n the operation of thej he' ter; which is ar ranged-gen the'delivery side s.of;1,;.the feedwater ,pump,=' jfeedwaterY-Fis injected.- toughthe f inlet nozzle l:l,. into-.,the'conduit'2. lfThis] water. is: turned upwards'into the heating chamber or" r main.,conduit l, and deflected by the-concavity 13- in the. deflector-i 12' along the lower part. "15 f of theichamber about; the lower limbs of the steam.

tubes ;At1the same time; water inthe condui t 2 is entrained by theaction of the nozzle and g draws with it waterfrom' thefclosed end of the heating chamber 1, so that a circulation of the lesser heated water isset' up. around the. lower Y 1 part of thechamber and the'conduit 2. As some of the water becomes hotter, instead. of being drawn down into the conduit 2jwhen itreaches I the'closed end of the heating chamber, it rises above the deflector plate 12 and flows alongthe top part 16 of the heating chamber aboutthev upper limbs of the. steam tubes 5,; and thus to the outlet l l. The steam is introduced tothe upper limbs of thesteam tubes and leavesby the lower limbs, so that the water flows both through 3 the part 15 and the part 16 of theheating chamber 1 counter to thepheati ngsteam (as shown'by '-thearrows)..y -With this arrangem ter connections are located at one end of the heater, so that it maybe arranged in spaces where there is no access from therear and sides. This may be a" gre power plants, Further, it is a; matter of no difil-' culty to fit a by-passfor the feedwater,1 'and this-1 may be of a simple one-spindle type. 4

It will be apparent that the tube pl gether with the tubes 5 andthe deflector ,312 can be removed as, a unit, whenever required, after first disconnecting the steam chest 6. L

. Steamnozzles (notshownl may the conduit 2, preferably at or near the middlev thereof, and connected to a source of live steam supply; suchasthe auxiliary live steam range of a steamship. The feed heater may. thus be used 7 as a hydrokinetonand cold water in a boiler or, a set of boilers heated up priortoYfiring sothat steam can beraised quickly without" risk of damage to the boilers. Obviously, the feedwater heater may be varied without departing from the scope of the inven-{ tion. The form and mounting; of the deflector ent all the'fsteam and wa- 9.,

at, convenience inthe design of Y be placed-1n m9 *cies of space andgaccessibility.

plate may be modified, or the plate dispensed with altogether and its purpose fulfilled, for example, by the shaping of the entry from the conduit to the heating chamber, or by suitably dishing the tube plate.

Further, it is merely-zto be preferred that the feedwater inlet, the feedwater outlet and the steam connections should be-grouped adjacent the same end of the heater, and other arrangements maybe adopted according to the exigeni-r We claim:-

--1, A'boiler feedwater heater comprising acas ing forming a main conduitfor'the passage of the feedwater tothe boiler, return-bend steam heating tubes extending intothemain conduit, a, -defiector extending between. .the limbs; of the; tubes and dividing the-main conduit into intern-1 communicating parts, an auxiliary conduit. in circuit with one of said parts, and inlet means for the fe'edwaterlocateddirectly in the auxiliary conduit whereby the feedw'ateradmittedinduces a circulat'lo'n {through said circuit, the deflector plate'being curvedadjacent the feedwater inlet to provide aqpartly stream-lined water leaving the auxiliary conduit.

2. IA boiler feedwater heater comprising a casing forming a mainiconduit for the passageof the teedwater to the boiler, return-bend steam heating tubesextending into the main conduit, a de-,- fie'ctorextendin'g between the limbs of the tubes and'dividing the main conduit into intercommunieating parts, an auxiliary conduit in circuit with V one of 'saidparts andan inlet nozzle for the feedpath for the water located directly in the auxiliary conduit to causethe-entering feedwater to induce a circulation through said circuit,"the deflector plate being curved adjacent the feedwater inlet to pro-i vide" a'. partly stream-lined path for the 1 Water leaving the auxiliary conduit.

. 3.7 A boiler feedwater heater comprising a tub- '7 ular casing with an auxiliary conduit in the wall thereof, a feedwater inlet located in the conduit with a nozzle for entraining water and directing it into the casing,

a feedwater outlet from j the casing, return-bend steam tubes projecting into the casing from a tube-plate, adefiector projecting from the tube-plate between the limbs ofithe tubes and having a concave portion oppositethe feedwater inlet, anda steam chest fitted over the tube-plate and having an inlet and an outlet dis:

posed for passingthe steam through the tubes V counter to" the flow of the feedwater through the casing.

4..A boiler feedwater. heater comprising a the'feedwat'e'rto the boiler, return-bend steam heating tubes extending intothe main; conduit, a deflector extending between the limbsof'the Y tubes and dividing the main conduit into intervcasingforming a main conduit for the passageof communicating parts, an auxiliary conduit in circu t 'with'one of said parts, and an inlet nozzle for the water directly into the main conduit and induce a circulation through said circuit. a r

JAMES I NEWBY WYNDI-IAM.

STEPHEN LEYS'HONY WYNDHAM.

jfeedwater located in the auxiliary con duit atone endthereof todirect the entering feed-l

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