US1121755A - Feed-water heater for boilers. - Google Patents

Description

F. D. PATTBN. FEED WATER HEATER FOR BOILERS.

APPLICATION FILED MAB..5. 1914. 1,121,755. Patented Dec. 22, 1914.

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F. D. PATTEN. FEED WATER HEATER FOR BOILERS.

APPLICATION FILED MAR.5, 1914. 1,121,755, Patented Dec. 22, 1914.

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FEED-WATER HEATER FOR BOILERS.

Specification of Letters Patent.

Patented Dec. 22, 1914.

Application filed March 5, 1914. Serial No. 822,676.

To all whom, it may concern Be it known that I, FRANKLIN D. Parrnx, a citizen of the United States, residing at Portland, in the county of Multnomah and State of Oregon, have invented certain new and useful Improvements in Feedater Heaters for Boilers; and I do declare the following to be a full, clear, and exact dethe invention, such as will enable others skilled in the-art to which it appertains to make and use the same.

This invention relates to improvements in boilers and more particularly to attachments for heating the feed water before the same is injected into the boiler.

The primary object of the invention is to provide a device of the character described. which may be located in the breeching of a boiler and which, when in this position, will be subjected to a great amount of heat which would otherwise escape without being utilized.

A secondary object of the invention is to construct the attachment in such a manner as to cause a continuous circulation of water through the same, thus obviating any danger of overheating.

Still another object is to provide means whereby any sediment may be readily ex hausted from the heating coil of the device.

With the above objects in view, the invention resides in certain'novel features of construction and combination herein described and claimed and shown in the drawings wherein:

Figure 1 is a side elevation partly in section, of a return tube boiler showing the application of my invention within the breeching thereof; Fig. 2 is a vertical transverse section on the line 22 of Fig. 1; Fig. 3 is a horizontal section on the line 33 of Fig. 1; and Fig. 1 is a side elevation partly in section showing the application of the invention to a different form of boiler.

In the accompanying drawings, the letter B designates broadly a return tube boiler which comprises the usual water chamber C through which the return tubes T extend, a fire box F, above a suitable grate G, an ash pit P below said grate, a draft flue D extending beneath the major part of the water chamber 0 and rising in front thereof in communication with the tubes T, a

breeching or smoke receptacle B. in com:

munication with the opposite ends of said tubes and a suitable stack S discharging from said breeching.

Within the breeching B is disposed my improved feed water heater which is in the form of a horizontal coil 1 rigidly supported upon suitable brackets 2 which are secured to the opposite side walls of said breeching. The inlet end 3 of the coil 1 passes through one side of the casing around the breeching B and is connected bymeans of a T-coupling with a feed pipe 5 and with a circulating pipe 6, the latter depending from said T'-coupling, and thence extending horizontally as shown at 7 and entering the bottom of the water chamber C at the point 8. The horizontal portion 7 of the pipe 6 is provided with a check valve 9 which opens outwardly from said water chamber C and with a suitable globe or cut ofi-valve 10. The feed pipe 5 is connected in any appropriate manner with the injector (not shown) and is preferably provided'with a suitable cut off valve 11. The discharge end 12 of the coil 1 passes through the opposite side of the casing surrounding the breeching B and is connected by a T-coupling 13 with a blow off pipe 14 and with a circulating pipe 15, pipe 6, has its lower portion extending inwardly, in a horizontal plane as shown at 16 and in communication with the interior of the boiler at the point 17. The horizon; tal portion 16 is provided with a check valve 18 which opens toward the discharge end of the pipe 16 and with'a globe valve 19, while the upright portion 15 is provided with a suitable stop cook 20 and with a globe valve which, like the circulating 21. The blow off pipe 1 L is provided with a e suitable globe valve 22 for a purpose to appear.

The operation scribed, is as follows: All of the'valves and of the invention, so far de- 7 cocks, with the exception of the globe valve 7 ofi, however, the r Weight of the water within the boiler and the pressure ofethe steamtherein, will (cause the check valve 18 to close whilethe check valve 9 will be opened and the water will rise within the pipe 6 and pass into the coil 1 where it will again be heated Since the flow of the water from the coil, through'the pipe 6, is automatically cut off by the check valvefi), said "water will be forced to travel through the pipe 15 and the check valve 18 and back into the boiler. This operation iis ontinuous as long as the valves 10 19, Q9 -2-1 iare open, ilIldyELS long as the valve 22 is closed. WVhen, however, it becomes HQ 'GSSQry to cleanse the interior of the coil 1, it is simply necessary to -close the stop "20 or the globe -,valve -21 and open the nalve =22, whereupon, the return communination fron1 the-vcoil l and the lower side of theiboile will be cut oil (and communication oviilgltbe established between said coil and the gl IlQWtOfi gpipe il through which the Water will noW tbeqdisoharged, thereby removing any sediment which may have collected in said coil. The globe valves 10, 18 and 21 are prjovidged {more dior the purpose of regulating the amount of water to :be circulated than dior'the purpose of using them to entirely pnevent fsaid ,circulatiion.

4 I have shown my invention as applied to a slightly different form of boiler B", which is provided on its under with amtld tank or receptacle with which the {discharge end 117 of the horizontal pqnt ion :16 of the circulating pipe '15 communicates, .said pipe :16 being provided with a check ave-Ive l8 and a globe value 1 the generations of which are the same as theitlof the yailves {l8 and 19- above described. The remainder of the construction is precisj'elzy the same as that illustrated in the first three figures of the drawings, and further description and illustration thereof is not thought to be necessary.

1 g hatze ShQWil my invention as applied to two types of boilers, but it will be readily understood that :I need not, be limited to these pantioular applications, .since the intention would {operate to equal advantage with any te m of boiler having a 'tbreeching adaptable for the herein mentioned puroses.

From the foregoing description, taken in connection with the accompanying drawings, the construction and operation of the invention will be readily understood Without requiring'a more extended explanation. "It may be well, however, to give a detail explanation of the manner in which the blow off pipe is employed In using this pipe, one of the valves 20, 21 or 19 is closed while the valve 2-2 is opened, thus preyenting water, forced through l the pipe 6 and the coil 1 iirom returning to the boiler, the result being that this water is forced to discharge through the blow :off pipe 14 thereby ave gi g e o 1 en else r o g any mud or sediment firom the boiler.

Ha ing esc ib d y ve tion, Wha I claim as new ,and dGSH'fi to secure by Letters-Patent, is:

The combination with a boiler having a i I smoke box in one end, a number of smoke flues communicating with the lower portion of said smoke box, and ia smoke stack "leading from the smoke :box, of :a pair of suping pipes, a water feed pipe in va lned comnntnication with one end of said ,coil and a blow 0J3? pipe in valved communication with the opposite end thereof, one of said check valves opening toward said coil and the other opening away theiefrom. y

(In {testimony whereof l have hereunto set my hand in .presen'ce of two subscribing witnesses.

FRANKLIN D. PATTEN. wi n a John A. Bnnssrns, ;S. SIsL Y.

Copies of this patent may be obtained for five cents each, biy addressing the flomngissioner of ratents Washington, D. 3;.

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