USRE11805E - watson - Google Patents

Description

0.. m 3 2 n a 1 O u 8 .B B N o s T A W S I t nm H FEEb WATER FILTER FOR STEAM BOILERS i (Apylication film-Aug 1, 1899.)

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VIIINISSSJ Beissu ed Jan. 23,1900.

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m a n v H. B. a J. 5. wnsou. "FEED WATER FILTER FOB STEAM BOILERS [Application fled. Aug. 1-, 1999.

" I Reissu W H. B. &. J. S. WATSON. FEED WATER FlLTER FOR STEAM BOILERS.

ed Jan. 23,1900.

No. mans.

WITNESSES.

ATTORNEYS UNITED STATES i PATENT OFFICE.

UPON-TYNE, ENGLAND- I FEED- WATE R FILTER FOR STEAM-BOILERS.

.SREGIFI'GATION forming part of Reissued Letters Patent No. 11,505, dated January 28, 1960.

Original No. 8l1,667, ime October 4, 1898.

To all whom it may concern."

Be it known that W6,HENRY BURNETT WAT- SON, engineer, and J OHN STANLEY WATSON, engineer, citizens of'Great Britain, residing at High Bridge W'orks, Newcastle-upon-Tyne,

,in the county of Northumberland, England,

have invented certain new and useful Improvements in Feed-Water ilters Used .in Connection with Steam-Boilers,'of which the following is a specification.

Our invention relates to improvements in water-filters more especially applicable for fil- 'terin g water for use in steam-generators, and 1 has for its object toprovid'e a relatively large 1 aggregate filtering area within a casing of relatively small dimensions, and, further, to expeditiously elfect the filtration and purification of water in large quantities without the necessity of frequent cleansing or renewal of the filtering material employed.

Ourinvention consists in the provision withi in the casing of a number of reticulated or j perforated cases around which the filtering 7 medium is wrapped of such a form or of such a number or of such a dispositiou as will provide a relatively largeor a maximum filtering area, so that the internal area or dimensions of such component cases shallv be relatively small or the minimum necessary for allowing theunrestricted passagg of the percolatin g wa ter therethrough, while the interstitial outer Space may also be relatively small or the minimum necessary to insure the free access of the water tothe surfaces of the filtering-cases.

In the accompanying drawings, Figure 1 is an irregular section on line 10 d of Fig. 2. Fig. 2 is a sectional plan taken on line a b of Fig. 1, thecasing A and supporting-bracket only I being shown ..in section. Fig. 3 is a modified duplex arrangement of filtersin accordance withourinvention, while Fig. Us aplan thereof. Fig. 5 illustrates in part sectional elevation an, enlarged view of a filter case or frame,- and Fig. 6 is asectionali plan thereof; Figs. 7. to 11, in sectional plan. different forms and. sections of filtering cases or frames. Fig. 7 is a polygonal section.

Fig. 8 is an oblong I section. Fig.9 is a triangular section. Fig.

illustraatte in diagrammatic sectional eleva- 3 l0 is. a polygonal treble section, while Fig- 11 is an oval double section. Figs. 1 13, and 14.

.sary: The lower extremity of each of the'cases is provided with a boss 0, upon which the easel Application for reissue filed August 1, 1899. seen Nani 762.

tion an arrangement of three filters with valve connections arranged for duplex working.

In carrying our invention into elfect we pro" vide acasing A, preferably of circular sectional form, having a diaphragm or false bottom surface 13, which may be cast or formed integral with casing A or independently and capable of removal. Upon this diaphragm B the filter cases or frames 0 are mounted, such cases being provided witha firm andtight seat upon the diaphragm and being cav pable of ready removal therefrom.

The filter-casin g A is pro-Wrled with a cover D, which, is bolted thereto, and a removable cover O'," which .is set upon the protruding heads of the filter-cases O and holds the -up per-ends" thereof injposition.

An intermediate chamber E is provided in the casing A, and n outlet valve aperture is centrally formed, hrough which a mushroom valve'F is'seated, s'uch valve, with its stem, being provided upon a bracket G, bolted to the'casing, and being operated by a hand wheel H. The inlet-valve I is providedjwhich, with its stem, is mounted upon a bracket G and operated by a'hand-wheel H. The inlet- I the passage of the unfiltered water the mom mulation of a great pressure islobviated by means of such relief or by-pass valve K,which immediately upon such determined pressure being exceeded is uplifted and the water passes through the outlet M direct to the" boiler.

. The filter cases orframes C are provided with closed'up er-ends and with apertures or perforations 0. around their peripheral surfaces, upon which the filtering. flannel or material a maybe wrapped and after-wrapping be clipped and retained upon the cases or frames by means of clips, straps, or bands 0,

disposed at each end of the cases .or interline-z Q diate thereof or otherwise, as may benecesrests and whose extremity within the seat provided in the diaphragm B by any suitable means, while the upper extremity of each of the a screwed plug 0'.

The filter may be held to the wall by a suitable holder or bracket A Fig. 2.

Theaction of the filter is as follows: The inlet-valve I and the outlet-valve F are opened and the unfiltered water from the feed-pu' mp enters the casing A and surrounds the cases 0, percolating through the filtering material wrapped thereupon andpassmg internally into the cases ber E, where the filtered water passes through the common valve-aperture to the outlet M and thence to the boiler, as indicated by the arrows.' Y I I When it is desired to cleanse the filter in a case where only one is'empIOyed, the inletvalve I and the outlet-valve F are closed, thus permitting the feed through the by-pass m boiler without filtration.

When the filtering medium employed has become saturated to substantially unaffected, by cleansing in this way, the cases are removed and new material is placed thereupon, and for this purpose the cover l) is removed and each case removed singly, and if an independent diaphragm is employed-that, together with the cases mounted thereupon, is entirely removed for this repair.

Figs. 3 and 4 show in elevation and plan a duplex arrangement of filters substantially the same in construction as that illustrated in Figs. 1 and 2; shown for diverting the unfiltered'water from the feed-pump to one of the filters when the other is required to be cleansed. The common inlet J is shown and'the duplex changevalve P works upon opposing seats within the valve-casing Q.

When it is desired to divert the water from to the filter A the duplex valve is screwed down to the lower seat and the supply out off from the inlet J of the filter A, while the upper part of the valve is opened and the feed-water issues through the inlet passage J 'to the filter A it will be seen that by means of this arrangement it is pos sible to filter continuously, the periodic isolation of one filter allowing for regular cleansing while the other is in operation.

A suitable. indicator 1a is employed to show the position of the valve. The filtered water issues in each case to a common outlet M, and independent outlet-valves F are employed. The operation of the duplex filter is substantially the same as the single. filter hereinbefore described.

4 Figs. 12,13, and 14 illustrate a system of continuous filtration in which three filters 5 are employed for duplex working, the filters 111 each case being arran ed and operatin substantially b a as hercinbefore' described and fitsand is retained.

cases is provided with such arr-extent as to be A change-valve P is here being used in continuous succession; "filters A and A are shown in Fig. 12 as being in use, the filter A being the primary filter, while the filter A is the secondary filter. The feed-water passes from the pump through the inlet-pipe J through the inletvalve 1 through the filter AF, thence to the interme-' diate chamber E, through the valve I to the filter A, intothe intermediate chamber E to thevalve F, and thence through the outletpipe M to the boiler. riod of filtration the inlet-valve I and the inlet-valve I valve 1 closed and'the feed-water passes from the inlet-pipe J direct to the filter A The outlet-valve F is closed, so that the watgr after passing into the intermediate chamber E passes through the communication-valve is opened The and communication- I", which is previously opeznedflhroughto' the filter A into the intermediate and thence through the ohtlet-v'alve-F direct to the boiler. The fil r A is meanwhile cleansed, and after-a further determined period of filtration the filter A is cut oif and the feed-water passes through the valve 1 directto the filter A into the intermediate chamber E thence through the communicating pipe J and-communicating valve I to the filter A passing to its intermediate "chamber through the outlet valve F and thence through. the outlet-pipe M to the boiler.

Figs. 12, 13, and 14 show the cycle of operations, thevalves being shown closed or open, as required, and the direction of the feed-water in each figure indicated by arrows. 1

It will be understood that two filters are continuously employed, while the other is cutout of'circuit and cleansed, ready to be used as the secondary filter when the primary filter becomes surcharged, and after a period of use chamber E,

as a secondary filter the feed-water is passed direct therethrough and the filter acts as a primary filter, while the other filter previously cut out of circuit and cleansed is used as a secondary filter, and so on? We do not limit our-invention to the specific tion.

sirable modification made in'the arrangement of construction to adapt the filter for filtration of the water from the interior to the exterior of the filtering-cases without departing from the essential Having now described our invention, what we claim as new, and desire to secureby Lettors Patent, is-

1. In a filtering apparatus, a chamber A,

having a'diaphragm-B forming upper and lower compartments, a series'of reticulated -.cases or frames seated upon said diaphragm and having their interiorscommunicating featuresof our invenwith the lower compartment, an inlet-passage communicating with the upper compartment, an outlet-passage communicating with the lower compartment and a by-pass valve in communication with the inlet-passage,substantially as described.

2. In combination, the chamber A having a diaphragm 13 forming upper and lower compartments, the series of reticulated frames having necks seated in openings in the diaphragm, filtering material surrounding said frames,heads protruding from the upper ends of said frames, a removable cover or plate 0 having openings to engage and guide said heads, an inlet to the upper compartment, an I 5 outlet from the lower, with valves controlling said inlet and outlet and a by-pass valve connecting said inlet directly with the outlet,sub-

.stantially as described.

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