US1287922A - Feed-water heater. - Google Patents

Description

NI. L. DUNNAM.

FEED WATER HEATER. APPLrcATIoN man Au s.15.ls\a.

l ,287,922. Patented Dee. 17, 1918.

2 SHEETS-SHEET I.

M. L. DUNN/xm.

FEED WATER HEATER. f

APPLICATWN HLED AUG.15| l9l8. 1,287,922. Patented Dec. 1T, 1918.

2 SHEETS-SHEET 2.

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MARTIN LUTHER DUNNAM, 0l" MERIDIAN, MISSISSIPPI.

FEED-WATER HEATER.

Application led August 15, 1918.

To all whom t may concern:

Be it known that I, MARTIN L. DUNNAM, a citizen of the United States, residing at Meridian, in the county of Lauderdale and State of Mississippi, have invented certain new and useful Improvements in Feed-Tater Heaters, of which the followingy is a specitication.

This invention relates to combined condensers and feed-water heaters of the type shown in Letters-Patent No. 1,076.410, granted to me October 21, 1913, and has for its object the provision of simple and etlicient means-whereby the water will be thoroughly heated before entering the condenser and also to improve the construction of the condensing chamber.

The invention is illustrated in the accompanying drawings, in which- Figure l is a vertical longitudinal section of an apparatus embodying my present improvements g Fig. 2 is a horizontal section on the line 2-2 of Fig'. 1;

Fig. 3 is an end elevation;

Fig. 4c is a transverse vertical section.

In carrying out my invention, I employ a casing which is substantially inverted U- shape in cross-section. In forming the casing, I take a. rectangular blank of sheet metal or other suitable material and double the same upon itself longitudinally so that when` set up on its side edges it will present an arched top 1 and vertical sides 2. The lower edges of this outer casing wall may be connected by a bottom plate 3 and the ends are closed by headers, indicated at 4 and 5. Above the bottom plate 8, I provide a partition consisting of a series of troughs or flues 6 extending from end to end of the casing in parallel relation and having their sides integrally or otherwise intimately connected, as shown at 7, thereby providing` a series of alternating troughs to contain the water admitted into the condenser, as shown at 8, and titles or passages 9 through which the heat for raising the temperature of the water may pass. Heat from the boiler furnace may be admitted into the space between the bottom 8 and the partition 6 or a grate 10 may be provided at the front end of said space, as illustrated. In either event, a flue 11 will be provided at the back of the casing to carry the waste heat ott' to any point of discharge. Upon the front header will be pro- Specication of Letters Patent.

-the lower edges of all the plates.

Patented Dec. 17, 1918.

Serial No. 250,010.

plurality of air tubes 14 which extend from f end to end of the casing and have their ends opening through the respective headers 4 and 5, as shown. These air pipes are arranged in arcuate rows, as shown most clearly in Fig. 4, and below each row is disposed a drip plate 15 which catches the drip from'the water condensing upon these tubes or Apipes and directs the same into troughs 16 arranged on the sides of the casing in position to catch the discharge from A feed pipe 17 is arranged in a tortuous path eX- tending through the several iues 9 and eX- t-ending longitudinally of -the said lues. The sections of the pipe are connected alternately at the front and rear of the condenser by branches 18, as shown most clearly in F 1g. 2 and the discharge end of the pipe is carried inwardly through the front header 55 and preferably equipped with a spout 19 lwhereby the water is deposited in the adj acent trough 8. rllhe iow through the feed pipe should be so regulated that the level of the water in the condenser will remain approximately constant just at or below the bottoms of the troughs 16. From the front ends of the troughs 16, pipes 2O extend to a pump (not shown) which operates to draw the water from the troughs and force it to the boiler or gang of boilers.

From the foregoing description, taken in connection with the accompanying drawings, it will be readily seen that the water, which must flow through the feed pipe 17 before entering the condenser, is exposed to the direct action of the tire upon the grate 10 or the heated currents fed t0 the heat chamber from the boiler furnace and the escape of the heated currents through the flue 11 will create a draft through the pipes or tubes 18 which will draw cool air constantly therethrough. As the water enters the condenser in a heated state it will be readily vaporized within the condenser and the vapor will, of course, rise to and circulate between .the several drip plates and condensing tubes and will be recondensedby contact with said tubes so that the puriiied water will drip onto the drip plates and be directed thereby into the troughs i6 from which it will be drawn and fed to the boiler by the feed pumps as stated. rlhe corrugated formation of the partition 6 which constitutes the bottoni of the Condensing chamber and also the roof of the heating chamber provides an extended heating surface in direct Contact with the water in the condenser so that the vaporizing 0peration will be efficient and continuously performed. The inverted U-sliape'd' orino'f the casing permits the same to be ver;7 eX- peditiously and economically manufactured so that the cost of installing the condenser in existing` plants as -Well as .in plants to be built Will be minimized. The iorni4 of the casing, furthermore, provides a Wider snpport for a condenser chamber' of a given diameter than forms heretofore employed.

Having thus described my' invention, what is claimed as newr is:

A feed-Water heater and condenser coni- .prising an inverted tit-shaped casing ineluding; straight vertical sides and an' arched Jeinigten i nse'rgoaa top7 a partition secured at its side edges to the straight 4vertical sides of the casing, said partition being* constructed with longitudinal corrugations forming troughs and tiues, a header closing the front end of the casinga second header closing the rear end of the casing and having its loWer'end lconstructed to leave the space below the partition and the rear ends of the fines in the partition Open, ani escape iiu'e at the yrear end of the easingv in communication with: the lines in the partition and the space below' the partition, a feed pipe passing tortuously throng-'h the several .lues' and haring. oneend carried inwardly `through the header atv the iront end of the casing and provided with' a spout discharging into one of the troughs,

`means in the upper portion of the casing for condensing the vapor rising from 'the troughs, and means for drawing off the condensed Tfapor. v A,

lin testimony whereof l my signature.

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