US352379A - Feed-water heater - Google Patents

Description

(No Model.) Y E. 4WARD'EN.

AFEED WATER HEATER.

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'Patented Nov. 9, 1886.

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- tain through the tu'bes F a circulation of steam UNTTED STATES PATENT OEEICE.

HENRY VARDEN, OF FHILADELPHIA, PENNSYLVANIA. l

FEED-.WATER HEATER.

SPE QIFICATION forming part of Letters Patent No. 352.379,*dated'Novembez 9, 1886.

Application tiled November 1, 1585. Renewed August 23. 1885. Serial No. 211,649. (No model.)

To @ZZ whom, it may concern.-

Beit known that I, HENRY WERDEN, a citizen of the United States'residing in Philadelphia, Pennsylvania, have invented certain Improvements in Feed-Water Heaters, of which the following is a specification.

Oneobject of my invention is to so construct a feed-water heater as to cause a slow and uniform circulation of the water therein, so as to obtain the best heating effect and insure the proper deposition of the impurities contained inthe water, a further object being to provide for the removal of the sediment and scum from the heating-chamber.

In the accompanying drawings, Figure 1 is a longitudinal section of a feed-Water heater constructed in accordance with my invention; Fig. 2, a transverse section of the same; Fig. 3, aperspe'ctive view of part of thesupply-pipe of the heater and its distributer; Fig. 4, a perspective View of the scum-discharge pipe, and Figs. 5 and 6 views showing modifications of one feature of my invention.

Ais the main portion of the shell of a heater, which is in the present instance in the form of a cylinder, and is provided with opposite concave-convex heads B B, between anges on which and flanges at the ends of the shell A are confined the outer portions of the plates D D, which carry the heating-tubes F, a steaminlet pipe being connected to a branch, a, Yon one head B, and an outlet-pipe to a similar branch, a', on the opposite head, so as to mainfor thepurpose of heating the Water. The latter enters theheating-chamber from a supply-pi pe, G, which communicates with a distributingpipe, J, located within the vessel A, close to the bottom of the same, and Iextending almost from end to end of the heating-chamber.

In the top of the pipe J are slots b, these slots extending from the ends of the pipe a1- most to the center of the same, the pipe having a closed top directly over the mouth of the feed-pipe, and the slots b being preferably tapered-that is to say, gradually decreasing in width from the ends toward the center of the 1 e. p IAcollecting-pipe, M, of construction similar -to the distributing-pipe J, is arranged in the upper portion of the vessel A and communicates with the discharge-pipe N, so that the pipes have no distributing and collecting pipes within the heating-chamber.

The tapering slots of the distribukting and collecting pipes insure the entrance or dis charge of a practically uniform volume of Water from end to end of the heating-chamber, because in those portions of the pipes farthest from the supply or discharge pipe the area of the slot is increased to such an extent as to compensate for the decreased pressurel in the pipe at such points. The Water consequently ascends slowly and at a uniform rate in all portions of the heating-chamber, ample time being thus afforded for the deposition of the solid impurities contained in the Water and for the rising of the lighter impurities in the form of scum to the upper portion of the ing-chamber.

The tapering of the slots b need not be resorted to in all cases. For instance, the distributing or collecting pipe may be so much larger in area than the supply or discharge pipe that there will be a low and practically uniform pressure in all parts of said distributing or collecting pipe.

The solid impurities collecting in thelower portion of the heating-chamber are drawn off from time to time through a pipe, d, located -close to the bottom of the chamber and having a slot or perforations in its under side, asimilar pipe, j', Fig. 4, having a slot or perforations in the upper side', being located close to the upper portion of the heating-chamber, and serving for the discharge of the scum which accumulates therein.

Rows of perforations may be formed in the pipes J and M, instead of slots, as shown, for instance, in Fig. 5, these perforations being preferably graduated in areain the same manner as the slot, and, if desired, the feed or discharge pipe may communicate with one endof the distributing or collecting pipe, instead of with the center of the same, as shown in Fig.

h'eat- 6; or there may be two or more feed or discharge pipes communicating with as ingle distributing or collecting pipe.

When it is not desired to heat the water in the vessel A, the pipes 'F and plates D may be dispensed with and the vessel used as a setthug-chamber, the absence of a strong current insuring the effective separation -of the impurities from the water7 which may be heated either before passing through the vessel or after its passage, or both before and after the separating operation.

I claim as my inventionl. The combination, in apparatus for purifying or heating and purifying feed-Water, of the shell or casing of the feed-water vessel, an inlet-pipe having a distributerin the lower portion of the chamber Within said casiug,and a dischargepipe having a collector in the upper portion of said chamber, both distributing and collecting pipes being slotted or perforated and providing extended areas for the inlet and discharge of the Water, whereby the latter is caused to flow through the Vvessel without forming special currents, all substantially as specified.

2. The combination of the shell or casing of a feed-Water vessel With a distributing or collecting pipe contained in the chamber within said casing, and having a passage of di'erential area for the water7 the area of the passage being greater at points remote from the inlet or discharge pipe than at points adjacent there to, all substantially as specified.

3. The combination of the shell or casing of 3 5 'a feed-water vessel7 a Water-inlet pipe communicating with the chamber Within said vessel at some distance above the bottom, a waterdischarge pipe communicating with said chamber at some distance below the top, and scum and sediment discharge pipes located, respectively, near the top and near the bottom of said chamber, all substantially as specified.

4. The combination of a shell or casing of a feed-Water vessel, and the inlet and discharge pipes for the water, with a slotted or perforated sediment discharge pipe in the lower portion of the chamber within the casing,and a similar pipe in the upper portion of said chamber for the discharge of scum, all substantially as specified.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

- HENRY WARDEN. Witnesses:

WILLIAM F. Davis,

HARRY SMITH.

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