US1701262A - Feed-water preheater - Google Patents

Description

Feb. 5, 1929. 1,701,262

F. c. HABER FEED WATER PREHEATER Filed Nv. 26, 1926 2 Sheets-Sheet 1 O00 O00 O00 O00 O00 O00 O00 Feb. 5, 1929. 1,701,262

F. c. HABER FEED WATER PREHEATER Filed Nov. 26, 1926 2 Sheets-Sheet 2 All ' preheater.

Patented Feb. 5, 1929.

were STATES 1,701,262 PATENT OFFICE.

' FRANCIS C. HABER, BRObKLYN, NEW YORK.

FEED-WATER PREHEATEB.

- 7 ,Application filed November 26, 1926'. Serial H0. 159,68

' This invention relates to. a new and useful device in the nature of a feedwater preheater particularly adapted for use in connection with steam boilers for the purpose of preheating the feedwater supplied to a steam more fully described, claimed and illustrated.

in the accompanying drawings,in which;

F 1 shows a front elevational view of a steam boiler, partly in section, seen as though looking as indicated by the line 1-1 inFig. 2, and equipped with my improved teedwater Fig. 2 shows a verticallongitudinal sectional view taken on the line 2'-2 of Fig. 1.

Fig. 3 shows a'perspective detail view of my improved feedwater 'p're'heater.

Fig. t shows an enlarged sectional view taken on the line l.-l of Fig. 3. Fig. 5 shows a further development of my improved device. i

Fig. 6 shows an enlarged sectional detail view of the valve for regulating the supply of feedwater.

The shell proper 10, the upper'shellmem bers 11, 12, 13 and 14:, attached thereto in the usual well known manner,'the the box 15, grate bars 16, fire doors 17, the tubes 18 and ash pit 19 are the common elements of a fire tube boiler such as ordinarily employed to generate steam. It should be understood that I doinot limit he use of my invention to steam boilers of the type above referred to and C escribed, but to all classes and types of steam boilers sucn as generally manufactured and used. As here embodied my improved device comorises a water inlet nine 20 leadin from an convenient source of supply, controlled by a valve 21, the pipe passing through the upper'shell member 13' to-enter the central lateral opening of an ordinary commercial T fitting 22. In the end openings of the T fitting 22 are engaged elbows23,'havingtheir opposite ends, directed horizontally and in which are fixed pipes 24 leading to return elbows 25.. Return pipes 26 engage in the other openings of the return elbows and extend parallel below the same horizontal with intern al threads plane to connect with the return elbows 27 Similar return pipes 28 engage in the other openings ot .the return elbows 27' andcxtend parallel below the same horizontal plane to connect, with the elbows. 29. In the opposite openings of the elbows 29 are engaged nipples 80,,which engage with the valve casings 40-. In. the coacting openings of the valve casings 4:0 are engaged the pipes 32 disposed in parallel below the pipes 28.: The pipes 82 are provided with caps33,and contain a plurality of relatively small perforations 34-, located .or positioned in the upper half portion of the pipes32. f

In order to support this structure, clips 35 are secured to the stay rods 36 carried by the, upper shell niei'bers 11 and 12, and to the pipes "24, 26, 28 and 32, 'maintaining'my im-' 7 proved device at any preferred height within the spaceattliet'op ofthe steam boiler. so as to permit the pipes 32. to besomewhat below the water level. v i

Inoperation, steam bein generated in the boiler fills the space above the water line and v imparts a portion ofits heat to my improved device suspended therein. If the valve 21 be opened permitting the inlet of feedwater, the

same flows'through the pipes and fittings arranged symmetrically on each side and eventually escapes through the perforations in fine spray at a high-temperature and adds to the supply of water already int-he boiler.

Referring in particular to Fig. 5 of the cconipanying drawings, the above mentioned inlet pipe 20 enters the central lateral opening of an ordinary commercial flanged Tfit'ting 37. In the end openings of the flangedT fitting 27 are engaged the elbows 23 and similar elbows 38, of somewhat smaller size or dimensions, so as to permit a second pair of the above described structures tobe attached thereto, as would be advantageous. in boilers of larger size. I

The valve casings 40 are supported to the shell proper 10. The pipes 32 areprovided' 11, at their extremities adj: .tent to the valve housings 40, ada to receive the valve proper 42', integral Vliii or attached to the valve stem 43, having a hand'wheel 44-attached thereto, positioned of the pipes32, adjacent to the valve housing 40, are provided with elongated slots 45,.

"which register with the nipples 30, said'registering being maintained by the threaded member 46, a set screw or the like, positioned in threaded apertures of the valve housing 40 and the pipes 32. The apertures 47 are located in the valve propel 42. A packing gland 48, threadedly attached to the valve housing 4:0, is provided, to hold the packing 49 in place, so as to prevent leakage of the feedwater.

The above described construction is such as will permit the valve proper 4-2, when turned or rotated by the hand-wheel 44, to regulate the amount of feedwater supplied to the steam boiler. It should be'understood that the apertures l? in the valve 42 are adapted to permit a predetermined amount of water to flow into the pipe sections 32 when the valve is positioned to the right as viewed in Fig. 6. These apertures thus provide for the passage o'l a minimum amount of water into the pipe extension 82 at all times and when it is desired to increase the supply of water to the boiler, the valve 4-2 may be moved to the left as viewed in Fig. 6 so as to uncover the slot 45 and permit a direct communication between the nipple and the extension 32. It should also be understood by controlling or regulating the flow of water at the lowermost part of the system, it is possible to regulate not only the amount of Water that is discharged into the boiler, but the length of time such Water is retained in the uppermost portion of the feed system where it is subject to the heat of the steam developed in the boiler.

Having thus described my invention, what I claim as new and desire-to protect by Letters Patent of the United States is as follows:

A preheater for steam boiler feedwater comprising an upper series of imperforate pipes disposed above the water level of said boiler adapt-ed to convey feedwater therethrough for allowing the same to be heated, a pipe extension disposed below the surface of the water in said boiler and communicatively connected with said series of pipes having perforations therein adapted to discharge 'leedwater into said boiler below the surface of the water-therein, a valve casing forming the connection between said upperseries o'l? pipes and said pipe extension, said pipe extension being disposed at one end insaid valve casing and screw threaded'internally at said end portion, a valve in said casing having apertures therein for permitting a predetermined minimum amount of waterv to flow from said series of pipes to saidfextension and actuating mechanism operatively connected with said valve for adjusting the position of the same for regulating the flow of liquid to said pipe extension above said predetermined amount. 7

In testimony whereol' I have afiiXed my signature. FRANCIS C. HABERV

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