US1672455A - Boiler - Google Patents

Description

June 5. 1928.

eosse BOILER Filed March 27, 1923 5 Sheets-Sheet l N ME m v .5 7 I June 5 ILE Filed March 27, 192;; s Sheets-Sheet 2 rllllffl A. GOSSE June 5, 1928.

BOILER Filed March 27, 1923 3 Sheets-Sheet 5 Patented June. 5, 1928.

UNITED STATES PATENT orrica. J

AUGUSTE GOSBE, OF PARIS, FRANCE, ASSIGNOB TO THE SOCIETE rmcarsn DE. CON STBUCTIONS HEOAINIQU ES (ANCIENS HABLIBSEHENTS GAIL), OI nuns, TRANCE.

Application fled March 27, 19 28, Serial ll'orMBJfl, and in France April 4, 1922.

My invention relates to improvements in steam generators which comprise one or more steam and water drums and one or more sets of vaporizing tubes, separate from the steam and water drums.

It is-a recognized fact that a great mass of water is required in the boilers intended to ensure an irregular service of va orization, in order to avoid the rapid an excessive falls of pressure at the moments of abnormal demands for steam. However such great mass of water is a hindrance to rapidl raising the pressure in case this has fal en for any reason.

One object of my invention is to provide means whereby the mass of water in the boiler drum or drums, may be placed at will in the circuit of the water circulating throughthe vaporizing tubes or remove from said circuit. The advantages of boilers containin a reat volume of water are thus obtaine when placing the mass of water in the circuit and all the drawbacks of said boilers are avoided by re oving said mass of water from the circuit when desired.

In the appended drawings and by way of example:

Fi 1, is a diagrammatic view of a boiler in w ich the various elements have been spread out upon a common plane so as to better illustrate the disposition which characterizes the invention; Fi 2 and 3 are views similar to Fig. 1 an showing slight modifications.

Fig. 4 is a diagrammatic elevational viewshowing how my invention may be applied to a standard type of boiler.

Fig. 5 is the end view thereof.

As shown in Fig. 1, the mass of water a is contained in'a steam and water drum b connected at its upper part by the pipe or pipes e with the upper end of a set of vaporizing tubes d which first receives the action of the gases of the furnace. A downwardly extending pipe h is connected at p with, the upper part of the drum 6 on a level below the header e and is connected to another pipe is by means of a, box m containing a flap valve 11, said box being also connected with the lower part of the drum 6 by means of the pipe 0. The valve n which may be controlled from the outside is adapted to close either the pipe h or the pipe 0 or to take any intermediate position between these two end positions. In this latter case, pipe h constitutes a by-pass: connection betweenv the water 0utlets 71' and 0 of drum 6.

The pipeJcis connected. at the bottom with the lower part ofthe setof vaporizing tubes other. u is a water heater.

In the construction shown in F 3 a collector eis interposed between t a set of vaporizing'tubes d and the 'pipe e while another collector s-aflords communication between the pipe 7c and the set of, tubes. (1.

4 In Fig. l, the flap valve n is shown in its position for closing the pipe or bypass connection h and in igs. 2 and 3 it is shown in its positionjor closin the pipe- 0..

Figs. 4 and 5 are mere y given by way of, illustration to show the positions the various parts of my invention occupy when ap lied to a boiler of standard construction. gince similar parts have been given similar reference characters, these figures are thought to be understood without further explanation. The operation of my device is as follows. If the valve n is in the position shown in. Fig. 1, the pipe h is closed and the pipe or coupling 0 is opened. The water in the tubes (1 being heated by the hot gases from the furnace rises and flows through the header e and. into the steam space ofdrum b where it is partially drawn 01f in the form of steam. Since pipe h is now closed the water entering drum 6 which is not converted into steam, upon cooling slightly circulates down through the mass of water a, through outlet 0, pipe is, mud drum 1', header and finally back into tubes d where it is reheated.

The mass of water a is thus included in the water circuit.

If the flap valve n is in a position to close the pipe 0 and open the pipe h, as shown-in Figs. 2' and 3, then thecirculating water no longer passes down through the entiremass of water a but only through a small: portion of the hottest portion thereof. The water upon leaving-header a now circulates through the upper portion of the mass of water a, out through the opening p, the bypass constituted by pipe h, pipe In, drum 1', header 9 and back into tubes 03. The boiler now has but a small quantity of its water in circulating relation with its water tubes which gives it a flash characteristic and permits the boiler to supply a sudden increase in demand of steam very: rapidly.

If the valve n is placed in an intermediate position then the circulation takes place through pipe h as just described but at the same time part of the water circulates through the mass of water a and raises its temperature.

Thus when the demand for steam on the boiler is normal, the valve is turned to close the opening it and circulate the water of tubes d through the whole mass of water a contained in drum 6, the boiler thus functioning as an ordinary water-tube boiler in a manner well known in the art. When for any reason the pressure has fallen and must be rapidly raised, then the valve is turned to open plipe h and close the outlet 0 thus cutting t e large mass of water out of the circuit of the water circulating through pipes d. In this manner, the low temperature of this mass of water does not oppose the rapid rise in pressure.

It should be noted that if the fall of pressure is chiefly due to an abnormal and much continued demand for steam, feed water should be supplied to the boiler; this additional feed, which usually increases the difficulty in raising the pressure, has no detrimental action 111 my improved boiler inasmuch as the feed takes place through at at the lower part of the drum b or 0, while the upper part of the mass of water a, that is to say the warmest part of this mass, is alone progressively inserted into the water circuit in order to replace the water which is vaporized in the set of vaporizing tubes d.

WVhen the steam pressure has been raised to its normal value, the valve n is gradually turned to open the outlet 0 so that the mass of water a will be gradually placed in the circuit and reach progressively the general temperature without causing a fall in pressure.

Obviously my invention is applicable to all types of boilers comprising a mass of water contained in one or more drums combined in any desired manner and one or more sets of vaporizing tubes. The mass of water may be heated or not by the gases and the drums may be constructed with or without smoke tubes. The set of vaporizing tubes may of course be of any desired construction and arrangement.

Having now described my invention what I claim as new and desire to secure by LettersPatent is:

1. A water-tube boiler comprising in combin-ation, a combustion chamber, a source of heat within said chamber, a plurality of water-tubes subjected to the hot combustion gases of said. source of heat, a steam and water drum having a steam space therein, a steam outlet for said steam space provided at the upper extremity of said drum, a water outlet near the upper end of said drum, :1 second water outletnear the lower end of said drum, a by-pass conduit connecting said outlets, means connecting the lower end of said by-pass and said second outlet to the lower ends of said water tubes, distinct return means for connecting the upper end of said water-tubes to the steam space in said drum and means for governing simultaneously theflo'w from said outlets to said connecting means;

2. vA water tube steam generator comprising in combination a combustion chamber,

a source of heat wlthln said chamber, a set of water tubes subjected to the hot combustion gases of said source of heat, a steam and water drum having a steam space therein, a steam out-let for said steam space provided at the top of said drum, return pipes for connecting the upper ends of said water tubes to the steam space of said drum, an upper water outlet near the upper part of said drum, a by-pass pipe connected to said upper water outlet, a lower water outlet at the lower part of said drum,aconduit in communication at one end ,with the lower end of said water tubes and at the other end with the by-pass pipe and the lower water outlet and controllin means for governing simultaneously the ow from said outlets to said conduit.

3. A water tube steam generator comprising in combination a combustion chamber, a source of heat within said chamber, a set of water tubes subjected to the hot combustion gases of said source of heat, a steam and water drum having a steam space therein, a steam outlet for said steam space provided at the top of said drum, return pipes for connecting the upper ends of said water tubes to the steam space of said drum, an upper water outlet near the upper part of said drum, a by-pass pipe connected to said upper water outlet, a lower water outlet at the lower art of said drum, a conduit in commu vnication with the lower end of said water tubes and means whereby the said conduit may be put into communication either with the by-pass pipe or the lower water outlet.

4. A water tube steam generator according to claim 1, comprising also means for supplying feed water to the lower part of said drum.

5. A water steam generator comprising in combination a combustion chamber, a source of heat within said chamber, a set of water tubes subjected to the hot combustion gases of said source of heat, a steam and water drum having a steam space therein, a steam outlet for said steam space provided at the top of said drum, return pipes for connecting the upper ends of said water tubes to the steam space of said drum, an P5617 water outlet near the upper part of 'san drum, a by-Fass pipe connected to said upper water out water drum and in communication with the lower part of the same a lower water outlet et, a water drum below said steam and on said water drum, a conduit in communication with the lower end of said water tubes and means for governing simultaneously the flow from said outlets to said conduit.

6. A water tube steam generator aocordll ing to claim 5, comprisin also means for supplying feed water to said water drum.

In 'testimonywhereof I have signed my name to this specification.

v AUGUST-E GOSSE.

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