US426123A

US426123A - Oooooooo

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Publication number: US426123A
Authority: US
Publication date: 1890-04-22
Anticipated expiration: 1907-04-22

Description

2 sheets sheet 1. 0. E. HUDSON. FEED WATER HEATER.

(No Model.)

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EEED WATER HEATER.

No. 426,123. Patented Apr. 22, 1890.

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Nirnn STATES ATENT OFFICE.

CHARLES E. HUDSON, OF UPTON, COUNTY OF ESSEX, ENGLAND.

FEED-WATER HEATER.

SPECIFICATION forming part of Letters Patent No. 426,123, dated April 22, 1890.

Application filed March 7, 1889. Serial No. 802,366, (No model.) Patented in England September 11, 1888, No. 13,141.

To all whom it may concern.-

Be it known that 1, CHARLES EDWIN HUD- SON, engineer, a subject of the Queen of Great Britain, residing in Upton, county of Essex, England, have invented certain new and usef ul Improvements in the Construction and Arrangement of Apparatus for Heating Feed- IVater of Steanrl-Soilers and Promoting Circulation in Same, (for which I have obtained Letters Patent in Great Britain, No. 13,1451, dated September 11, 1888;) and I do hereby declare that the following is a full, clear, and exact description of the same.

My invention relates to improvements in the construction and arrangement of feedheating and. Water-circulating apparatus for steam-boilers; and itconsists, essentially, in the application, as hereinafter particularly described, to the mouth of a furnace of a suitable hollow metal chamber, preferably of a circular or semicircular shape, into which the feed-water enters and where it is heated by the incandescent fuel and waste heat of the furnace. In combination with this water-receiver I employ for the greater heating of the feed-water and for the purpose of inducing circulation in the boiler a coil or coils or other form of pipe or pipes placed in the combustion-chamber or flue or in the ash'pit, and through which the feechwater also passes on its passage to the boiler and is further heated to a very high temperature. Combined with the above arrangement of water chamber and coil, or in combination only with the hollow metal receiver at month of fu.rnace,I may employ a tank placed at the back of fire-bars, such tank thereby taking the place of the ordinary bridge, into which the feed-water may be conducted from the first-mentioned chamher by means of suitably-arranged pipes, and from whence it may be distributed direct into boiler, or where the coils or pipes in combustion-chamber, flue, or ash-pit are employed it may be made to pass through such coils or pipes before being forced into the boiler.

By this my arrangement of feed-heater many advantages are obtained, among which may be mentioned:

First. Economy as compared with feedheaters now in use by reason of the feed heater being in accordance with this invention ar ranged and placed, as aforesaid, around the mouth of furnace, whereby it is in direct contact with the incandescent fuel and by that means heated to such a temperature that the existing necessity of using steam from the boiler to aid in heating the feed-watcr is overcome.

Second. Greater efiiciency, for by this my arrangement the feed-water may be delivered into the boiler direct from the heater, (situated in the furnace of the boiler,) whereby the ordinary arrangement of pipes (in which condensation takes place by reduction of temperature during the passage of the water) is dispensed with. Further, in boilers having a sluggish draft, or in others where a forced draft is employed, the velocity of the gases at this portion (the front end) of furnace is slow. It will therefore readily be seen that a feed-heater situated and arranged in the above-described manner will be of the greatest efficiency.

Third. The temperature of the stoke-hole is considerably reduced by reason of the radiated heat being absorbed by my feed-heater, and thus is utilized the (at present) waste heat of furnaces.

Fourth. The apparatus is, moreover, simple in construction and not liable to get out of order. It is easy of access for cleaning purposes, suitable sludge-doors being provided, and suitable safety valves are also fitted, while, should accident occur, it is easily shut off from action by means of stop-cocks and valves and the feed then carried on by the ordinary feed-pump connections.

In order that this invention may be more easily understood, I will describe same with reference to the accompanying drawings.

Figure 1 is a longitudinal section of a threefurnace marine boiler fitted with my improvements. Fig. 2 is a front elevation of same, the righthand half being in section through line Y, Fig. 1. Fig. 3 is a longitudinal section of a three-furnace marine boiler, which is fired from both ends, and in which another arrangment of my improvements is shown, whereby one .id of boiler is utilized simply for circulation and the other end for feedheating. Fig. f is an end elevation of same with the rightdiand half in section.

I11 accordance with this invention I dispense with the ordinary furnace-fronts and their baffles, and in lieu thereof I substitute a hollow metal chamber A, fitted at mouth of each furnace. The chambers A, I make of a circular or semicircular shape, and so arrange them that the remaining necessary furnacefittings can be utilized. \Vhen semicircular,I fit said chambers A above the dead-plates, but when of circular form they are fitted completely around the mouth of furnaces.

The hollow metal chamber, which is essentially the feed-heater of this invention, may consist, conveniently, of a metal tank or box, as in Fig. 1, or it may be formed of a pipe or pipes, or a combination of both tank and pipe or pipes, as in Figs. 3 and 4:, and in the case of two or more furnaces each chamber is preferably connected with the other by pipes, such as'B.

Water is supplied from the feed-pumps, and also by automatic circulation from all deadpoints of boiler-bottom through suitable piping C G, fitted with stopwa-lve D, for shutting off when required.

E, Figs. 1 and 2, is a tank or receptacle used in combination with the chamber A at mouth of furnace and placed at back of fire-bars, and into which, by means of pipes F, the feedwater passes from tank A. Thence it circulates through coil G, Figs. 1 and 2, and is fed into boiler at any convenient or desired position, such as through the feed-check valve H. This rear tank E, for its greater protection, may, if desired, be set in brick-work.

WVith further reference to Figs. 3 and 4:, in which the feed-heaterA in right-hand furnace is shown separate from and not in connection with the circulating apparatus in left-hand furnace, it will readily be seen that the feed is taken from feed-pipe G into tank A, where it is heated, and whence it passes through valve H into boiler.

The receptacle A in left-hand furnace,which is here shown as a combination of tank and pipe, is employed for inducing circulation only, water being taken from dead-points of boiler-bottom by pipes O, and thence circulating through receptacle A and discharged into boiler by pipe I.

What Iclaim as my invention, and desire to secure by patent, is-

1. The combination, with the furnace and the chamber A in the mouth thereof, of the tank E at the back of the fire-bars, and the coils G in the combustion-chamber, flue, or ash-pit and connected with the said tank, substantially as shown and described.

2. The combination, with the boiler and fire-bars, of the chamber A at the mouth of the furnace, the tank E at the back of the fire-bars, the coils G, connected with the tank, the pipes O and C, the valve D, and the pipe F, connecting the chamber and tank, and all arranged and operating substantially as shown and described.

In witness whereof I have hereunto signed my name in the presence of two witnesses.

CHARLES E. HUDSON.

Witnesses:

CHAS. A. CRooK, Gno. W. SCHEAD.