US1313199A - morison - Google Patents

Description

I D. B. MDRISON.

APPARATUS FOR HEATING BOILER FEED WATER.

APPLICATION FILED JULY 19. 1917.

1 ,3 1 3, 1 99. Patented Aug. 12, 1919.

3 SHEETS-SHEET I.

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. D. B. MORISON.

APPARATUS FOR HEATING BOILER FEED WATER.

APPLICATION men JULY 19, 19w.

1 3 1 3, 1 99 Patented Aug. 12, 191 9.

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Inventor Donald 5.1107680 t ys.

. D. B. MORISON.

APPARATUS FOR HEATING BOILER FEED WATER.

APPLICATION FILED JULY I9. 1911.

1,313,199. Patented Aug". 12, 1919.

3 SHEETS-SHEET 3.

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DONALD BARNS.MORISON, 0F HARTLEPOOL, ENGLAND,

APPARATUS FOR nn a'rrne BoILEnl FEED-WATER;

Specifi a of ma ma. Patented Au 1:5, 1919.

Application filed July 19, 1917; Serial No. 181,602.

To all whom it may concern: Y Be it known that I, DONALD BARNs' MOBI- SON, a subject of the Kin .of Great Britain and Ireland, residing at artlepool, in the countyof Durham, England, have invented the Improvements in or Relating to Apparatus for Heating Boiler Feed Water, of which the following 1s a specification.

The invention is an improvement in or modification of the invention described in Patent No. 1108210 of 1914, and also relates to the apparatus described in PatentNo. 1148182 Of 1915. I p

In the patents above referred to,the apparatus comprises a primary heater, and a secondary heater of the direct contact type, the steam only flowing to the secondary heater when a redetermin-ed pressure is reached in the prlmary heater. 2O 1 According to the'present invention, the primary heater, or the heating steam supply, is placed in free communication with the secondary heater by means of a passage, the arrangement being such that at low'loads when the heating steam is relatively small in quantity, practically no resistance is offered to the flow of steam to the secondary heater, so that under such conditions the back pressure onthe exhaustsystem is reduced. The passage, or it may be a heating nozzle or the like in the secondary heater to which the passage leads, is'of such area, or is provided with means capable of such regulation, that the quantity of steam required to heat the water supplied to the secondary heater'up to adesired temperature can, when available, be delivered thereto, the arrangement being such that when the steam available for use in the secondary heater is greater than is required for the desired temperature therein, the pressure in the primary heater rises until a predetermined limit is reached when the surplus steam passes into the condenser or suitably elsewhere. 7 i

Although the present invention possesses the advantages above referred to, it none the less embodies the arrangement in my prior patents, whereby a predetermined pressure'must be reached in the primary heater before steam passes fromthe heating system into the condenser or elsewhere.

Whether the device through which the steam enters the secondary heater, consists of a submerged nozzle or other means, as for instance a perforated plate placed in a'water spray chamber, such device may be con structed in a manner and of such proportions that it will pass' the required quantity of steam to heat a predetermined quantity'oif water flowing through the secon'daryrheater 'tola desired-temperature. 'For example, a

nozzle may be employed and placed within a submerged pipeor water circulating tube,

and provided with multiple outlets arranged to discharge jets of stealn'in the direction of the 'axis'of'the pipe or-tube, the supplyo-f water for the heating nozzle being preferen tially taken'from a filterchamber into which the feed water flows; a

The accompanying drawings'illustrate apparatus in accordance with my invention. J

-Figure 1 is afdiagrainmatic yiew o'f on'e form of feed water heatingapparatusQ f Figs-2 and 3 show-in detail a. form of heating nozzle for use ina secondaryllieater which contains feed water in bull andFig. l 4 is a view similar to Fig. 1 of a'modified form of feedwater heating apparatus. 7

The similar part/s are referred to by the same letters of reference.

With reference to Fig. 1, the primary heater- (1 and condenser-0 maybe connected to the heating steam supply system in any convenient manner, but inorder to render the drawing as simple as possible-theyare shown connected directly 7, to the" heating steam supply pipe 0, a loaded" valve g'- being placed between thecondenser cand pipe 0.

through the passage p from the primary heater a or the heating steam supply 6 to the secondary heaterib is controlled by the capacity of the nozzle 7 or by a shut-off valve or cock Z so that the steam supply to the secondary heater and the temperature oftheswater passing therethrough'is at'all times capable of regulation. The drainage water fromthe primaryheater is discharged throughthe pipe 8 into the secondary heater -b, or-any other convenient means for 'discharging the water from the may be employed.

n the arrangement referred to, the quantity of steam requiredto heat the water supprimary heater plied'to the secondary heater Z2 up to a de sired temperature, can, when available, be delivered thereto through the cock 9. WVhen, however, all the available steam is not'employed in the heaters, the surplus steam passes through the loaded escape valve 9 into the condenser.

Fig. 2 shows in sectional elevation the nozzle 1" shown in Fig. 1; Fig. 3 being a cross section on a larger scale on the line AA in Fig. 2. The nozzle is in the form of a stepped cone, each step d being of toothed formation, the teeth having steam outlet passages f which communicate with the steam space 7' in the nozzle, the spaces 6 between the teeth forming intermediate assages for the water which is circulatec by the inducing action of the discharged steam. The nozzle is placed within a pipe or circulating tube h having-water inlets m and a common water outlet at. The nozzle described maybe arranged in various ways but in the illustration it is shown contained in a small compartment in the interior of the secondary heater, the wall 0 having a circular opening I? through which the pipe 72, projects, and another opening it between the wall and the bottom of the heater. Feed water is admitted to the compartment through the pipe is, and entering the inlets m is discharged through the outlet 71. into the main chamber of the secondary heater 6, from which it is drawn by a feed pump A (see Fig. 1) and discharged into the surface heater a, from which it passes to the boilers. In addition to the circulation of the entering feed water in the manner described, the body of the water in the tank may be continuously circulated through the openings t and u in the manner indicated by the arrows.

Fig. 4 is a modification of Fig. l, the difference being that the secondary heater 6 in Fig. 4; is of the water spray type. In Fig. 4c, the secondary heater 6 consists of a closed vessel having a water inlet pipe is from which the feed water is delivered over the perforated plate 20 by which it is sprayed in the interior of the heater. Steam from the primary heater a enters by valve Z and is discharged into the chamber 3 formed between the perforated plate 00 and the side of the heater 6. From the chamber y the steam flows through the perforations in the plate 00 and is condensed by the water sprayed from the plate w.

What I claim is 1. Feed water heating apparatus comprising a primary steam heater receiving steam from a heating steam supply system and arranged on the discharge side of a feed pump, a secondary steam heater arranged on the suction side of said feed pump, a passage placing the heating steam supply or the pri- Washin ton. 0."

m'a'ry heater in free communication with a nozzle 1n said secondary heater, said nozzle being placed in a submerged pipe or circulating tube and provided with multiple outlets arranged to discharge jets of steam in the direction of the axis of said pipe or tube, means for limiting the quantity of steam flowing through said nozzle to that required to heat a predetermined quantity of water flowing through the secondary heater to a desired temperature, and a loaded valve through which steam not utilized in ,the

heaters passes from the heating system into a condenserwhen a predetermined pressure is reached in the primary heater.

2; Feed water heating apparatus comprising a primary steam heater receiving steam from a heating steam supply system and arranged on the discharge side of a feed pump, a secondary steam heater arranged on the suction side of said feed pump, a passage placing the heating steam supply or the primary heater in free communication with a nozzle in said secondary heater, said nozzle being placed in a submerged pipe or circulating tube and constructedin the form of a stepped cone, each step having atooth formation with steam discharge outlets from the teeth and intermediate passages for the flow of water between the teeth, and a loaded valve through which steam not utilized in the heaters passes from the heating system into a condenser when a predetermined pressure is reached in the primary heater.

3. Feed water heating apparatus comprising a primary steam heater receiving steam from a. heating steam supply system and arranged on the discharge side of a feed pump, a secondary steam heater arranged on the suction side of said feed pump, a passage placing the heating steam supply or the primary heater in free communication with a nozzle in said secondary heater, the latter having internal compartments into one ofwhich the water to be heated is delivered, a submerged pipe or circulating tube extending through an opening in the wall separating two of said compartments, the nozzle be ing placed in said pipe or tube for the purpose of circulating the heated water therethrough into the adjoining compartment, and a loaded valve through which steam not utilized in the heaters passes from the heating system into a condenser when a predetermined pressure is reached in the primary heater. I

Signed at London, England, this 28th day of June, 1917.

DONALD 'BARNS MOR-ISON. Witnesses:

HARRY FOTI-IERGILL, EDWARD LAWSON BRENIS.

five cents each, by addressing the Commissioner of Patents, =3. 1

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