USRE6891E - Improvement in feed-water heaters and filters - Google Patents

Description

J. ARMsTRoNG. FEED-WATER HEATER AND FILTER. N0. 6,891.- l Ressued Fe`n.1, 1876.

A Y l A a f f if F @y y i ..f v f@ im@ MMAM N-PETERS: PNOTU-UYMOGRAPNER, WASHINGTON. D4 C,

PATENT GEEIOE.

JAMES ARMSTRONG, OE TOLEDO, OHIO.

IMPROVEMENT-INv FEED-WATER HEATERS AND FILTERS.

Specication forming part of Letters Patent No. 81,971, dated September 8, 1868; reissue No. 3,834, dated February 15, 1R70; reissue No. 6,89l, dated February 1, 1876; application led March 13, 1873.

To all whom it may concern y Be it known that I, JAMES ,ARMs'rEONG, formerly of Bucyrus, in the county of Crawford and State of Ohio, but now of Toledo, in the county of Lucas, in said State, have invented certain new and useful Improvements sin Heaters and Filters for Heating, Purifying,

and Filtering Water 5 Vand I do hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accompanying drawings, in which- Figure 1 represents a planvor top View of the apparatus, with the covers of the heater and filter removed, Fig. 2 a vertical section, through a portion of the heater and the steampipes; Fig. 3, a similar section through the heater and filter, Fig. 4, a side elevation of the heater, with the lter in section, and Fig. 5 a view ofthe regulator-valve.

The heater-chamber is composed of a steamtight shell or cylinder, A, having closely-titting heads Al A2, the upper' one of which is made removable, to allow the pans to be re moved or replaced. These pans B Bl are arranged one above the other in the heaterchamber, and for convenience in handling are secured to a frame, B2, resting on the bottom ofthe chamber. They are, it will be observed, of two sizes, the smaller ones having solid bottoms and low sides, so that the feed-water may dow over them, while the alternate larger' ones have short pipes or collars inserted in their bottoms, through which pipes the feedwater flows, thus causing it to iiow over the entire surface of the pans. A disk, G, rests loosely upon the bottom head of the heater, and is provided with a handle, c, by which it may be removed or replaced. It is also provided with a ange or shield, el, which incloses the mouth of an overflow-pipe, D, the mouth of which pipe is bent down so as to draw off the water in the heater at a point some distance below the water-line. The shield prevents the deposit of sediment around the mouth of the pipe, while any oil that may be brought by the exhaust steam from the en gine into the heater, will float upon the surface ofthe water, and thus be prevented from passing' into the filter or boilers, in which latter it tends to produce priming. As the waterlevel is necessarily as high as the upward bend of the overflow-pipe D, it follows that thewater itself acts as a seal to prevent the access of steam to the filter, which is another advantage incident to my invention. The overflow-pipe D opens into a filter-chamber, consisting of a shell, E, with heads E1 E2, constructed in a manner similar to the heater. The head Ez is likewise made removable to afford convenient access to the filter-chamber, which is divided internally into two compartments, F F1, by a vertical diaphragm or partition, G, having perforations g near its bottom the filtered water is thus allowed to How from the lter-chamber F to the hot-well F1, whence it is pumped into the boiler. The steam-pipe H is shown in the drawings as passing through the filter-chamber and hot-well, in order to impart a still higher degree of heat to the feed-water after passing from the heater-chamber, it found expedient, but ordinarily' the water will be hot enough without this arrangement. The steam-pipe communicates with the heater-chamber, and its upper end is open to permit of theescape ofthe waste steam. The lower branch H1 of this pipe enters the heater near the bottom of the tier of pans, and is pro# vided with a semi-cylindrical valve, h, with a..

rounded end. This valve fits and slides in the pipe H1, and across the main pipe H, thus enabling the engineer to control the admission of steam to the heater. rThe upper branch pipe H2 is an exit-pipe merely, and serves only to conduct the waste steam to the escape-pipe, formed by the upper open part of the pipe H.

The operation of my invention is as follows: The feed-water liows through a pipe, I, into the upper pan of the series, and overflows it into the next one, and so on until all the pans are full of water, in a comparatively quiescent state, as the overflow takes place very gradually, and in thin sheets or sprays. Steam admitted through the pipe H H1 in regulated quantities heats the water, which causes the deposition of lime and such like constituents held in solution in it. After passing over the pans the water accumulates in the bottom of the cylinder, rising above the level of the pipe D, as above explained, where it has a chance to deposit the heavier portion of its sediment before passing into the lter F, which filter,

it will be. observed', is of comparatively large area. After being filtered it flows into the hot-well through the perforated diaphragm G, as hereinbefore set forth, and passes to the pump through the pipe k, Fig. 3.

I elaim- 1. A feed-water heater and filter, composed substantially of a series of heating and depositiug pans, a sediment-collecting chamber and a filter-chamber, arranged in such relation tov each other that the Water is first passed suecessively over the pansfor heating by steam forthe deposit of erystallizable salts, thence into a sediment-chamber, where the heavier elements settle, and from which it passes through filtering material in a filter-chamber of large area, where the remaining separable impurities are removed, substantially as hereiubefore set'forth.

2. The combination, in a feed-water heater and ilter, of a series of pans over which the water flows, a steam-pipe, and a valve to .regulate the admission of steam to the pans, substantially as set forth.

JAMES ARMSTRONG. Witnesses: v

JOE I. PEYToN, E. C. DAVIDSON.

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