US796237A

US796237A - Feed-water heater and purifier.

Info

Publication number: US796237A
Application number: US23124504A
Authority: US
Inventors: Henry E Moffat
Original assignee: Individual
Current assignee: Individual
Priority date: 1904-11-03
Filing date: 1904-11-03
Publication date: 1905-08-01
Anticipated expiration: 1922-08-01

Description

v N .796,237.' i PATENTED AUG.1,1905.` E. E. MOEEAT.

EEED WATER HEATER AND PUEIEIEE.

APPLICATION FILED NOV. 3,. 1904.

' 2 SHEETS-SHEET 1.

. auf jfy A M Mil/wf y I Inventor,

y .l i I l f No. 796,237.' l 1 AT11NTEDAUG..1, 1905.1 H'. E. MOPPAT. FEED WATER HEATER AND PLURIPIBR.

' APPLIATIoN4 FILED 1101113.19045 2 SHEETS-s111131: z.

fnl/en'forL UNITED sTATEs PATENT oEEIoE.

HENRY E. MoEEAT, oF wooDsToex, CANADA.

FEED-WATER HEATER AND PURIFIERQ..

No. 796,237. y

' vTo @ZZ whom, t may concern:

Beit known that' I, HENRY EssoN MOFFAT, gentleman, of Woodstock, f in the county of Oxford and Province of Ontario, Canada, have invented certain new and useful Improvements heaters and purifiers shown and described in the drawings and specification lof Letters Patent of the United States N o.' 540,751, granted' to me on the 11th day of June, 1895., In that patent the perforated water-supply pipe passes through the top end of the exhaustpipe, and interposed between it and the outlet a baile-plateto prevent the water sprayed bythe supply-pipe into the upper end of the feed-waterheater and purifier being driven through the outlet by the pressure of the exhaust-steam. yThis construction, however, has been unsatisfactory, as the metallic and mineral matter in the feed-water precipitates under 'the influence of the exhaust-steam and incrusts the bore of the exhaust-pipe, so that in the course of time the passage through it becomes'choked and causes thesteam to apply back pressure upon the engines and direct pressure upon the filter-beds to tear them from their placein the feed-water heater and purifier.

To render it impossible for the feed-water to enter the exhaust-pipe direct from the water-supply pipe is the primary object of this invention, and this object is attained by protecting the top end of the exhaust-pipe with a diaphragm or water-shed and placing the water-supply pipe between the water-shed andthe baiiie-plate vfor the outlet, so that the` water discharged into the feed-water heater by the water-supply pipe will be prevented by the diaphragm or water-shed from entering the exhaust-pipe and by the baflie-plate from being driven by the pressure of the exhaust-steam through the outlet, the diaphragm or watershed being of suicient dimensions and inclinations and having perforations beyond the outer surface of the exhaust-pipe to scatter the water evenly to all partsv of the topmost filter. l

' When the water is heavily impregnated with quicksand and other substances which cannot be retained in the lter-bed, but pass to the bottom of the settling-chamber, it is necessary to provide the feed-water heater and purier with a means by which such sediment can be Specification of Letters Patent.

Application tiled November 8, 1904. Serial No. 231,245.

Patented Aug. 1, 1905.

expeditiously flushed out of the settlingf chamber and settling-chamber filter to prevent it entering the pure-water chamber, and this means consists of a iiushing-pipe inserted through the outer casing of the apparatus above the settling-chamber filter-bed, so that a stream of water can be discharged upon it t'o wash the sediment to the bottom of the settl'ing-r i chamber, where it can be carried offthrough an opening in the side of the feed-water heater and purier at a lower elevation than: the bottom of the settling-chamber, the discharge of the impurities through such opening being accelerated-by a-seeond fishing-pipe located between vthe bottom Aof the filter and the bottom of the Vsettling-chamber. Inf'fthe bot- -tom of the settling-chamber is a concaved or curved indentation, below its top surfaceand fitted through the casing of the feed-water heater and purifier is a blow-olf pipe, the inner iend of which is opposed to`such conoavity or indentation to allow of the impurities owing unobstructedly out 'of the settling-chamber when the flushing-pipes are discharging water thereinto-forcleansing purposes. By means of this flushing apparatus the settling-chamber filter and the settling-chamber can be 'thoroughlyl cleansed during the operation of the 1 apparatus.

For a full understanding of the 'invention reference is to behad to the following description and to the accompanying drawings, 'in which Figure 1 is a front elevation of the feed-water heater and purier, partly in section, to'

show the relative position of the various parts.

The exhaust-steam enters the feed-water heater from the oil-extractor through the first section a of the exhaust-pipe, which has its inlet-port in circulation with the cylinder of the oil-extractor 60" and its outlet-port t dis-l charging into the feed-water heater above the top' of the settling-chamber c. Covering the Fig. 3 is a detail view of thebottom top of the first section a is a baffle-plate dto distribute the steam across the bottom of' the seeond filter e, through the center of' which passes the second section f of the exhaust-pipe, pref'- erably superimposed on the baffle-plate of the first section a. The second section f of the eX- haust-pipe has an inlet-port g below the bottom of the second filter e and an outlet-port 7L above the t'op of the same filter, and covering the top of the second sectionjl is a bafIie-plate e' for the samepurpose as the baffle-plate d. Above the baffle-plate e is the third filter j', through the center of which extends the third section It of' the exhaust-pipe, having an inlet-port Zhelow the bottom of the third filter and an outlet-port m above the top of the same filter. Covering the top of the third section of the exhaust-pipe is a water-shed o, projecting considerably beyond the outer surface of the eX- haust-pipe, and located above the water-shed 0 is the water-supply pipe p, preferably imperforate, to be connected with any suitable source of supply. The discharge end of' the water-supply pipe p has a downturned elbow p located immediately over the imperforate center of the water-shed 0, so that the inrushing water will fiow toward the edge of the water-shed and pass over it and through the perforations 0 to the top of the third filter j. To prevent the inflowing Water from the water-supply pipe p being driven through the outlet g, a baflie-plate r is interposed between the water-supply pipe and outlet g, the

baffle-plate being of sufeient dimensions to cover the discharge-openings of' the pipe.

The water enters the feed-water heater and purifier through the water-supply pipe p and Striking upon the water-shed 0 is distributed to all parts of' the top surface of the filter y', through which and the filter e it descends to the inclined plate s, which directs it into the settling-chamber t, together with any sediment, such as quicksand or other non-detainable impurities, which succeed in passing through the upper filters. From the settlingchamber t the water percolates through the settling-chamber filter u into the pure-water chamber lv, from which it is drawn off and returned to the boilers. The pure water chamber may be provided with an overflowpipe fw. To remove the sediment from the Settling-chamber and the filter a, a flushingpipe :11 is fitted into the feed-water heater and purifier above the top of the filter u, so that it will discharge a stream or streams of water directly upon the top of' the filter to wash any sediment which may have accumulated in the filter bed into the bottom of the settlingchamber t, from which it is discharged by the blow-off pipe e. The bottom of the settling-chamber t is cleansed, and the discharge of the sediment and impurities in the chamber is accelerated by a second fiushing-pipe a', located below the bottom of the filter u, through which a stream of Water is delivered to the settling-chamber for that purpose. To insure the removal of' all the sediment, the bottom of the settling-chamber has a coneavity or recess c' below the level of' the surface ofl the bottom, and alining with this recess c is the bore of the blow-off pipes Having thus fully described my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. In a feed-water heater and purifier having steam inlet and outlet ports, the combination of a filter interposed between the steam inlet and outlet ports, a steam-pipe extending through the filter and communicating with the steam inlet and outlet ports, a baflie-plate having an imperf'orate portion covering the outlet end of the steam-pipe and a perforate portion surrounding the imperforate portion, and a feed-water-inlet pipe having a dischargeport opposed to the imperforate portion of' the baffle-plate.

2. In a feed-water heater and purifier having steam inlet and outlet ports, the combination of a filter interposed between the steam inlet and outlet ports, a steam-pipe extending through the filter and communicating with the steam inlet and outlet ports, a bafiie-plate having an imperforate portion covering the outlet end of the steam-pipe and a perforate portion surrounding the imperforate portion, a feed-water-inlet pipe having a dischargeport opposed to the imperforate portion of the baffle-plate, and a second baffle-plate interposed between the feed-water-inlet pipe and the steam-outlet.

3. In a feed-water heater and purifier, the combination of' a filter, a settling-chamber located below the bottom of the filter, a purewater chamber, a second filter interposed between the settling-chamber and the pure-water chamber and located above the bottom of' the settling-chamber, a flushing means above the top of' the second filter to wash the sediment from it into the settling-chamber, and a sccond flushing means below the bottom ofl the second filter to fiush the sediment from the settling-chamber, and an outlet-pipe for the settling-chamber, the bore of which is below the bottom of the settling-chamber, said bottom having a depression in it opposed to the bore of the outlet-pipe.

4. In a feed-water heater and purifier the combination of a settling-chamber having' its bottom head disposed in a substantially horizontal plane with a depression therein below its top surface and extending to the edge, a horizontally-disposed outlet-port for the settling-chamber the bottom of which is in the same plane as the bottom of' the depression and a iiushing means to cleanse the .sediment within the settling-chamber and on the bottom head into the depression and through the outlet-port.

5. In a feed-water heater and purifier the combination of a settling-chamber having its bottom head disposed in a substantially horizontal plane with a depression therein below the level of its top surface extending to its edge, a horizontally-disposed outlet-port opposed to such depression thebottom of which combination of a settlingfchamber having an is in the same plane as the bottom of the depression and-a ilushing means discharging di-Y rectly upon the iilter to washthe sediment through it into the settling-chamber and from the settling-chamber and bottom head to the depression and the outlet-port.

6. In a feed-water heater and purifier the combination of a settlingfchamber having its bottom head disposed in a substantially hori-` zontal plane,with a depression therein eX-. tending to its edge, and an outlet-port opposed to such depression,- a filter suspended above the bottom head'o thefsettling-chamber, a iushing means discharging directly upon the JEllter to wash the sediment through it into the settlingchamber and a second ushing means interposed between'the filter and the botto head of the settling-chamber.

7, In a feed-water heater` and purier the outlet-port, a pure-water chamber, a lter interposed between the settling and pure-water chambers, an interiorly-located flushing means discharging directly uponthe lter, and a second interiorly-located flushing means below the bottom of the filter and above the bottom vhead of the settling-chamber.

'Inpresenco of- C. H. RIoHEs, L. F-.BROCK