US362840A - John w - Google Patents

Description

(No Model.)

J. W. HYATT.

BOILER EEEDEE AND PURIFIER.

Patgpted Ma N4 PETERS, vmo-ulho n hur. Wash| UNITED STATES,

PATENT EETQE,

JOHN V. HYATT, OF NEVARK, NE\V JERSEY.

BOILER FEEDER AND PURIFIER.

SPECIFICATION forming part of Letters Patent No, 362,840, dated May 10, 1887.

Application filed November 29, 1880. Serial No. 220,112. (No model.)

To aZZ whom it may concern:

Be it known that 1, JOHN W. HYATT, a citizen of the United States, residing at Newark, Essex county, New Jersey, have invented certain new and useful Improvements in Boiler- Feeders and Purifiers, fully described and represented in the following specification and the accompanying drawing, forming a part of the same.

The purpose of this invention is to effect the precipitation and the removal of mineral im purities from the boiler feed-water to prevent iuerustation within the boiler; and my object in the present invention is partly to furnish a means of heating the feed-water of a boiler to a high temperature and filtering the same before its introduction to the boiler, partly to circulate the boiler-fluid through the filter in con junction with the feed-water, and partly to apply these improvements to a battery or gang of boilers by a special arrangement of the water-pipes.

My invention is adapted particularly for steam-engine boilers operating under considerable pressure, and contemplates the introduction of the live steam from the boiler into the feed-water beforeits filtration, for the purpose of raising the water to a temperature considerably above 212 Fahrenheit to precipitate the mineral impurities in the most effective manner.

Various obstacles have hereto fore prevented the raising of the water to the same temperature as the steamas, for instance, it is well known that neither an injector nor force-pump can be advantageously operated if the suctionwater has a temperature above 212 Fahrenheit, and the heat required to elevate the feedwater above such temperature must therefore be applied to the water on its passage from the feed-pump to the boiler. As the water-pressure produced by such feed-pump is ordinarily equal to that existing in the boiler, in order to deliver the water therein it is obvious that a supply of steam from the boiler would not on ter such feed-pipe to heat the water in the desired manner.

My invention involves the use of two press urepumps, one operating to draw the feedwater from any source of supply, and the other operating with a larger delivery, and not only a regulated volume of feed water to the second pump, and as the capacity of the latter requires more fluid to supply it than is furnished by the first pump, the difference may be positively drawn from either the steam'space or the water space in the boiler, for the purposcsj ust named.

The steam and water pipes from the boiler may be furnished with stop-valves, by which the proportion of hot water or steam delivered to the second pump with the feed-water would be regulated, and the temperature of the water may thus be elevated very closely to the boiler temperature before the water is subjected to filtration; and, owing to such high temperature, a greater precipitate would be induced, and the impurities in the water may be thus most effectually removed from it.

\Vith a boiler-pressure of sixty pounds the temperature of the water may thus be raised without difficulty to 300 Fahrenheit, and a much greater precipitation be effected than by the use of the ordinary heaters, which produce a temperature seldom above 212.

Myimprovements are shown in the annexed drawing as applied to a battery of boilers; but it will be obvious from the following description that the invention is equally appli-' cable to a single boiler, as all the others in the battery might be disconnected without affect ing the operation of my improvements.

a a a" a represent an end View of four flueboilers.

b represents a filter having an outlet-pipe, 0, connected by branches d and cocks d with the water-spaces in the said boilers.

e'is the supply-pipe t0 the filter, connected with the delivery of a pump, f. The suction of this pump is connected with the delivery of another pump, g, by a pipe, h, and the suction of the pump g is connected with a water-sup ply by pipe 1.

The pumps may be of any desired construe tion, but are shown herein as plunger-pumps, actuated by cranks A upon a shaft, B, driven branch d.

by a pulley O, the pump f having a larger bore but the same stroke as the pump 9. By this construction the pump g for each stroke draws a given volume of feed-water from the pipe 9 and delivers through the pipe h to the pump j, which in turn forces it through the filter 1) into one or more of the boilers by pipe 0 and A pipe, I, connects the water-space in. the boiler with the pipe 72, and a pipe, J, connects the steam-space in the boiler with the pipe h, cocks I and J serving to regulate the delivery of steam and water through these pipes to the suction of the pumpf. As by its construction the delivery of the pump f is greater than that of the pump g, a partial vacuum is produced in a pipe, h, and steam admitted thereto into contact with the feedwater would be more or less condensed and mixed with the feed-water in the pump f, and be forced by the same through the filter to the boiler.

By closing either the cock I or J the vacuum in the pipe It would be supplied exclusively with either steam or hot water from the boilerspace within the boiler, while a partial opening of both cocks would permit the pumpfto draw a mingled supply of steam and hot water with the feed-water delivered by the pump 9.

As the hot water and steam in the boiler would be of substantially the same temperature corresponding to the pressure therein, it is obvious that the temperature of the feed-water could be elevated very nearly to that of the boiler before its passage through the filter. The condensation of steam with such feedwater would serve to increase its temperature much faster-than its volume would be augmented, While the deficiency in volume required to supply the capacity of the pump f could be made up by drawing hot water from the boiler to the desired degree.

As the filtration of the feed-water alone is not sufficient to prevent the further precipitation of the impurities when the water is evaporated in the boiler, it is obvious that a circulation of the boiler-fluidthrough the filter is very desirable to keep the boiler perfectly clean, and my construction thus affords the means of precipitating and removing by filtration the greatest possible proportion of impurities from the water before it is admitted to the boiler, while it also furnishes the means of removing from the boiler-fluid any precipitate caused by evaporation. In drawing the water from a number of boilers it is important to avoid such construction that an excess of fluid might be. drawn from one of the boilers, andrthus lower its waterlevel to an injurious degree, and I therefore apply my invention to a battery of boilers in such manner that the boiler-fluid in each may be circulated through the filter with substantial uniformity. To effect this result, Itap each boiler a little below the water-line and insert a pipe, 70, provided with a cock, Z, and unite it to the pipe I, leading into the pipe 71, and also provided with the cock I. By this construction the water drawn into the pipe h from any of the boilers can never reduce the water-levelin such boiler materially below the normal water-line, and although the pipe I would exert a greater suction upon the boiler nearest the pipe 71, the cock 1, connecting the pipe 70 with such boiler, can be nearly closed,

toextend the suction to the other boilers, and 75 similar to the cocksZ for regulating the delivcry of the filtered fluid to the different boilers, and thus regulating the volume which it is de sired to withdraw through the pipes 70.

From the above description it will be seen that my invention may operate either as a 0 boiler feeder or purifier, for when the two pumps are actuated in connection withthe steam-pipe J'alone the mechanism will operate simply to mingle live steam with the feedwater, and thus heat the latter to a high temperature, and produce a precipitate which would be filtered from the water before its delivery to the boiler. In like manner the device would be used when no feed-water is supplied to the boiler or boilers to draw hot water only through the pipe I, and to thus circulate the boilerfiuid through the filter to purify it continuously with the boiler or boilers in operation. By partially opening the cocks in both the pipes I and J both these operations may be performed simultaneously.

It might be supposed that a supply of water through a pipe under pressure would be an equivalent in my construction for the forcepump g,- but it will be seen that the function no of such a supply-pipe would not be the same as that of the pump, because it would supply an unregulated volume of water to the pipe 71, and pump f, and thereby prevent the adj ustment of the pump and the steam or hot-water I 5 pipe, which is connected therewith, in the re quired manner. The pump 9 in my construction not only serves to deliver a regulated amount of fluid to the pipe h, but at the same.

time to prevent the access of water or air to I20 the pipe when a vacuum is produced therein by the pump f.

Plunger-pumps, both connected to cranks upon the shaft B, are shown in the drawings;

but it is obviously immaterial what kind of I25 pumps are used or how they are driven, provided the deliveries are respectively proportioned in the required manner. Thus, if the pump 9 represents a feed-pump previously in use to supply a boileror boilers with water, my I 0 invention may be combined with the same by inserting a direct-acting steam-pump or a beltpump in the position of the pump fin the drawing and connecting it with the pump 9 For this pur- 8o and with a filter in the manner described, and providing the other pipes needed to carry out the system.

A checkvalvc, m, is shown in the drawing to prevent the passage of fluid from the pipe it through the pipe J; but such check-valve is not necessary if the cock J be properly regulated, nor are the cocks shown at (1, Z, I, and J nec essary to the working of my invention if the respective pipes are suitably proportioned to deliver the volume of fluid desired.

From the above description it will be seen that any form of pump or filter may be used to carry out my invention, and it is therefore obvious that the method of arranging the same in connection with the boilers and the means of conducting the fluids from one station to another may be varied to suit the circumstances of each particular case. Thus two pumps may be constructed upon a single frame and formed of the same bore with different strokes, and the pipe It may be replaced by a passage in the frame communicating between the outlet of the pump 9 and the inlet of the pump f. Such passage would be plainly an equivalent of the pipe h, and I do not therefore limit myself to a pipe or passage of any particular construction for connecting the pumps.

Having thus set forth the nature of my in- Vention, what I claim herein is 1. The combination, with a steam-boiler, a filter, and a force-pump arranged to deliver the feed-water through the filter to the boiler, of a feed-pump connected with the feed-water supply and delivering the feed-water to the force-pump through an intermediate pipe, as h, and a steam-pipe conducting steam from the boiler into the intermediate pipe to heat the feed-water before filtration, as and for the purpose set forth.

2. The combination, with a steam-boiler, a filter, and a force-pinup arranged to deliver the feed-water through the filter to the boiler, of a feed-pump of smaller capacity than the force-pump and connected with the watersupply, and delivering the feed-water to the forcepump by an intermediate pipe, and separate pipes connecting the steam and water spaces, respectively, in the boiler with the said inter mediate pipe, the whole arranged and operated as and for the purpose set forth.

3. The combination, with a battery or series of boilers, of a filter and a force-pump connected therewith and arranged to deliver the water through the filter to the boilers, a feedpump supplying water to the force-pump, and the pipes I and 0, arranged substantially as described, the pipe I having branches k inserted into each of the said boilers just below the water-line, and the pipe cbeing connected with the boilers by the branches (1, all substantially as and for the purpose set forth.

In testimony whereof I have hereunto set my hand in the presence of two subscribing witnesses.

JOHN V. HYATT.

\Vitnesses:

THOS. S. CRANE, HENRY J. MILLER.

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