US483905A - Feed-water heater and circulating system - Google Patents

Description

(No Model.)

S. G. DBSPRES. FEED WATER HEATER AND` GIRGULATING SYSTEM.

No. 483,905. Patented 001;. 4, '1892.

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UNITED STATE-sf STANISLAUS CHARLES DESPRES,

PATENT OFFICE.

CF TRAVERSE CITY, MICHIGAN.

FEED-WATER HEATER AND CIRCULATING SYSTEM.

SPECIFICATION forming part of Letters Patent No. 483,905, datedgOctober 4, 189,2. Application filed May 9. 1892. Serial No. 432.300. (No model.)

To all whom it may concern,.-

Be it known that I, STANISLAUs CHARLES Y DESPRES, a citizen of the United States, re-

. I do hereby declare the following to be a full,

clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

Myinvention is an improvement in that class of attachments to steam-boilers in which a series of water-conducting tubes or pipes are arranged within or about the tire-box for the purpose of heating the feed-water on its passage to the boiler and increasing the steamgenerating capacity of the device. -f

The primary object of my invention is t provide a combined Water feeding, heating, and circulating system which will in crease the capacity of the boiler, secure a greater heating-surface for a given amount of space, reduce the quantity of fuel required for heating purposes, and increase the steam-generating capacity of the apparatus.

A further object is to provide improved means for heating Water inside of a boiler not i in use or which may be held in reserve by causing a circulation of the wat-er in said boiler through coils placed in an adjoining boiler which is in use, so that water in an unused boiler or boilers may be kept constantly heated without rendering it necessary to keep a fire continuously burning for the purpose of heating the reserve boiler or boilers.

The several objects are accomplished by a simple and inexpensive system of valved circulating pipes or tubes, which arearranged so that the infed water is delivered at the highest boiling-point in a boiling condition, while the circulation is from the boiler through a pipe or pipes connected therewith at its lowest point and thence to the boiler below the lowest safety water-line thereof, so as to insure a perfect lcirculation and at the same time prevent burning out the circulatingpipes,thelatter being also adapted to prevent the formation-of air-traps therein.

The invention will first be described in connection with the accompanying drawings, and

then particularly pointed out in theclaims at the end ot this specification.

In the drawings which form a part of this specication, Figure l 4represents a sectional side elevation ofV a steam-boiler and attachments embodying my invention. Fig. is a rear view showing two boilers with connected circulating systems, and Fig. 3 is ahorizontal section taken on line III III of Fig. 2.

Similar letters of reference are used to denote similar parts in each of the several views.

A denotes a boiler for steam-generating purposes, which may have therein an ordinary water and steam chamber and a series or collection of longitudinally-disposed pipes eX- tending from the front to the rear of the boiler in the usual manner, so that the heat from the tire-chamber may pass through said pipes for the purpose of heating the water -in contact therewith.

B denotes the furnace-walls, of brick or other suitable material, which may be arched or otherwise formed to suit the requirements of the boiler which is fitted therein.v

C denotes the stack or chimney, and D the lire-box, these parts being constructed in any suitable manner.

E E denote suitable pipes or tubes, which may connect with an opening in the lowest point ofthe boiler by means of la pipe or tube E of such size as is best adapted to the size of the boiler, so as to insure sufficient ow of water through said opening and pipe to supply a pipe'or pipes lilwhich` latter are placed inside ofl the lire-archer fire-box or thereabout in such position that the tire orA heat used in heating the boilermay come in contact with said pipes or tubes. The pipe or 'pipes E in any desired number may extend back and lforth parallel with the boiler at either or both sides thereof and are secured in proper position to the walls of furnace or fire box in such manner as to insure room for expansion and contraction, the several pipes when constructed in sections being connected by unionjoints or couplings which will permit easy connection or disconnection between the circulating system and boiler. The free upper end or ends of the pipe or pipes E may connect with the boiler by means of a pipe or IOO pipes E2, arranged to enter a suitable opening or openings in the end orsides of-the boiler of a size equal to the capacity of` the pipe, such opening being placed below the lowest safety water-line of the boiler. The pipes E E2 are provided with straight-way or other suitablevalves e e2 for controlling the iiow of water therein, these valves being located between the opening in the boiler and the pipe ends or T-coupling section E3 connecting the terminals of pipes E E at either side of the boiler with the pipes E E2, so that a single valve will suflice to control the flow of water to both sets or series of pipes. The

lowermost pipe or portion of one of the circulating-coils E at one side of the boiler may communicate with a pump, inspirator, or other suitable device for supplying water to the boiler by means of a suitable pipe or tube F, which isprovided with a check-valve fand with a stop valve or cock f the stop-valve being designed to close the passage through pipe F when it is necessary to repair or replace the check-valve.

With the described construction, the boiler having been supplied with the necessary quantity of water through valves f e2, valve e is opened, and thereupon the water will circulate freely, passing directly from the bottom of the boiler through pipe E and into the circulating-pipe E or lowermost section of the series of pipes, and thence gradually rising in a serpentine course through said pipes E will return to the boiler through the pipe-section E2 near the top of the boiler at the highest boiling-point, thereby producing a perfect circulation by gravitation and ebullition, which is accomplished by causing the cold water to enter the lowest-pipe or point of the coil and allowing it to rise of itself, as it must when it becomesheated and enter the highest boilingpoint of the boiler in a boiling condition, thereby affording a circulation on the boiler, which is increased in accordance with the heat applied, regardless of the pressure on the boiler as the pressure is equal on all sides, and the circulation must take place by gravitation and ebullition. Valve e2 is open at all times, except when necessary to cut off the circulating system from the boiler, either for repairs or for the purpose of connecting the system with another or reserve boiler. Valve f is closed and valve e open, except when feeding. In feeding valve e should be closed and valve f opened, so that the feed-water may pass into the lower pipe or lowest point of the coil and rise therein as it becomes heated, as already explained.

In cases where it is desirable to have a boiler or boilers in reserve ready for use on short notice, as is the case with water-works, electric plants,large hotels, dac, it is necessary to keep a fire constantly burning under the reserve boiler or be subjected to the annoyance of waiting to get steam, which is very essential in some of the cases above referred to. I therefore propose to provide means for heating water inside of a boiler or boilers not in use by the circulation Aof the water in'such` boiler through coils placed in proximity to an adjoining boiler which is in use, so that the water in the reserve boiler or boilers may be kept at a boiling-point without necessitating the extra expense due to the consumption of fuel in such cases. To this endl-provide detachable pipe sections'or couplings G G,which the boiler A, except thatthe inletis from theA circulating-coil in the fire-box of the main boiler through the straight-way valves interposed in the detachable coupling-sectlons, which valves may be opened or closed at will for the purpose of opening or closing communication between the two boilers. f

The two boilers may be separated by a division-wall and provided with a common stack- C and {ire-box in each for separate irespif necessary, or the reserve boiler may be disconnected entirely from the fire-box and stack of the main boiler. i

When it is desired to use boiler A alone, valves g g are closed. If boiler A is to .be used alone, valves e e2 should be closed and valves g g opened. If boiler A is tovbe used and at the same time the water in the circulating-pipes thereof utilized for heating the water in the reserve boiler A', valves e e2 are closed and valves g g and h h opened, and thereupon the circulation will take place from IDO the heated coils through the reserve boiler and may be cut off and turned on at will by manipulating the valves e e g g for the purpose of keeping the Water in the reserve boiler at any desired temperature and causing a circulation through either boiler independently of the other. When the system is used on two or more boilers not having an equalizing-pipe,it will be necessary to connect the feed-pipe to each boiler, as indicated by the dotted linesI in Fig. 3.

The several valves and union joints connecting the valved portions of the circulating system with the circulating-pipes inclosed within the fire-box or furnace-walls are all placed outside of the brickwork or wall, so as to protect the same from the heat.

It is well known that Water will not circu-l late through a horizontal pipe, and that to obtain a perfect circulation the ends of the pipes taking the water and passing it back to the boiler must be under the water-line, otherwise you will only get steam back to the top of the boiler as fast as it forms in the coils. It is also well known that a free circulation of water is prevented by the formation of air-traps in a spiral or abruptly-bent pipe or way along which the water must be conducted. .In View of these difficulties the disposition of the pipes and the inclination thereof in my system are such as to conduce to the free circulation of the water and entirely avoid the formation of air-traps in the coils orbends of the pipes. Furthermore, the circulating-coils are placed inside of the brick arch out of the way land in position to receive heat, which would otherwise be absorbed by the bricks, and the pipes are practically a protection to the walls of the fireplace or furnace.

Having thus fully described my invention, what I claim, and desire to secure by Letters Patent of the United States, is-

l. A combined water heater, feeder, and circulating system for steam-boilers, comprising a series of pipes or tubes arranged on opposite sides of the boiler, a pipe-section connecting the lower terminals of the series of pipes with the bottom of the boiler through a single controlling-valve, a similar pipe-section connecting the upper terminals of said series of pipes with the upper part of the boiler below the water-line therein, a single valve for controlling the iow of water through the lastmentioned pipe-section, and avalVe-controlled feed-pipe communicating with both series of circulating-pipes, substantially as described.

2. In a water heater, feeder, and circulating system for steam-boilers, the combination of the series of pipes extending back and forth at either side on a gentle incline from the receiving to the delivery ends thereof, couplings connecting the two series of pipes at their receiving and delivery ends, an intermediate pipe-section connecting the lower coupling with the bottom of the boiler, a similar pipesection connecting the upper coupling with the upper part of the boiler below the waterline therein, a single valve controlling the iiow through each of said pipe-sections, and a valved feed-pipe communicating with both series 'of circulating-pipes, substantially as described.

3. In combination with the main boiler and water-circulating pipes or coils and the valves for controlling such pipes, a reserve boller and water-circulating pipes connected therewith, and interposed valve mechanism, substantially as described, wherebythe water 1n the reserve boiler may be heated by the circulation of the water from the coils of the main boiler through the reserve boiler, and vice versa, substantially as set forth.

4. In combination with the main boiler and its valved circulating-pipes, the reserve boiler provided with a similar system of valved clrculating-pipes, and the coupling connecting the pipes of the two boilers and provided with a Valve for controlling the circulation "between the same, substantially as described.

5. In combination with the boiler and furnace, the series of vertically-disposed circulating-pipes secured to the furnace-walls at either side thereof and connecting at one end with the boiler at or about at the highest boiling point and at the other end with the lowest point of the boiler, the feed-pipe with stopvalve therein, and the straight-way valves -interposed in said circulating-pipes betweensaid stop-valve and the pipesections leading to the boiler, together with the reserve boiler,

provided with a similar double series-,of cir-l culating-pipes and straight-Way valves ycontrolling the same, and the intermediate cutoff valves for opening and closing communication between the reserve boiler and adjacent circulating-coils, substantially as (le--8 scribed.` I

In testimony whereof I afx my signature 1n presence of two witnesses.

Witnesses:

' CHARLES J. KNULAND,

JAS. G. JOHNSON.

S. CHARLES DESPRES'.`

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