US657614A - Water-tube boiler. - Google Patents

Description

Patented Sept ll, I900.

J. PLATT;

WATER TUBE BOILER.

(Application filed Feb. 23, 1899.)

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UNITED STATES PATENT OFFICE.

JOHN PLATT, OF WESTFIELD, NEW JERSEY.

WATER-TUBE'BOILER.

SPECIFICATION forming part of Letters Patent N 0. 657,614, dated September 11, 1900.

Application filed February 23, 1899. Serial No. 706,468.

To aZZ whom it may concern-- Be it known that 1, JOHN PLATT, a subject of the Queen of Great- Britain and Ireland, residing at Westfield, county of Union, and

State of New Jersey, have invented certain new and useful Improvements in Water-Tube- Boilers, fully described and represented in the following specification and the accompanying drawings, forming a part of the same.

This invention relates to certain improvements in that class of water-tube boilers in which a plurality of waterdrums located alongside a grate or a series of grates is used in connection with steam-separating means, such as an upper steam drum or drums, the steam-separating means being connected to the water-drums by means of groups of tubes through which a circulation between the water-drums and the steam-separating means is attained, the groups of tubes being arranged to be exposed to the gases and other heated products of combustion rising from the fire.

It is the object of this invention to so arrange the connecting-tubes in boilers of the class described as to insure a long-continued contact between the products and both the tubes and the steam-separating means and to also provide for maintaining a free draft from the fire.

With this and other objects in view the invention consists in certain parts, improvements, and combinations, all of which will be fully described in the specification and specifically pointed out in the claims.

In the accompanying drawings, which illustrate one embodiment of the invention, and

in which like characters of reference indicate the same parts, Figure 1 represents, diagram matically, partly in elevation and partly in section, so much of a boiler constructed in accordance with the invention as is necessary to an understanding thereof. Fig. 2 is a horizontal sectional plan view of a part of the boiler shown in Fig. 1, the section being taken on the line 2 2 of this figure. Fig. 3 is a horizontal sectional detail illustrating a modification.

Referring to Fig. 1, which represents one of the types of boiler in which the invention may be embodied, 1 indicates a grate. In the form of boiler selected to illustrate the (No model.)

tionbeing well understood and the type of boiler being a familiar one.

On the outer sidesof the two grates are 10* -cated Water-drums 2 and 3, and between these grates islocated another water-drum 4. Rising from these water-drums are groups of tubes, which are marked 6, 7, 8, and 9, respectively. These tubes serve to connect the waterdrums with the steam separating means and are located within the usual casing- 10. In the form of boiler shown the steam-separating means consist of a single steam-drum, and this is the preferred construction. The invention is not, however, limited to boilers employing a single steam drum, as it may be applied to boilers having more than one such drum.

In the form of boiler shown the groups 0 tubes 6 and 9 are shown as connecting the water-drums 2 and 3 with the top of the steamdrum or with that part of the drum which is above the normal water-level, while the groups of tubes 7 and S are shown as connecting the water-drum 4 with the lower part of the steam-drum 501* that part of the drum which is below the normal water-level. It is to be understood, however, that this arrangement of'the tubes, while it is considered a desirable one, is not necessary to the invention. If desired, all the tubes may be brought into the steam-drum below the normal water-level thereof, or all the tubes may be brought into.

said drum above the normal water-level, or any desired proportion of the tubes may be connected with the drum below the waterlevel.

In order that the full heating power of the products may be utilized, it is desirable that they be kept in contactwith the groups of tubes aslong as possible and yet insure a free draft. The several tubes of each of the groups 6, 7, 8, and 9 are therefore so arranged as to form longitudinal passages lengthwise of the boiler, the products being admitted to these passages and caused to pass along them, The products are preferably admitted to the passages formed by the several groups of tubes substantially at one end thereof. The products thus come into contact at least once with tubes 60 or the tubes nearest the combuse.

tion-chaluber of the group 6 and the outer tubes 61 of the same group will be arranged close together, seats to form .walls with a pas sage between them, in which passage the remaining tubes 62 of the group are located. In

the same way the tubes 70 and 71 of the group oftubes 7 are preferably arranged to form a passage in which the tubes72 are located,

and the tubes 80 and 81 of the group 8 andthe tubes 90 and 91 ofthe group 9 are also a similarly arranged to form passages in whichthe tubes 82 and 92 are located.

not limited to this'construction. The walls,

for instance, might be formed partly of tubes and partly of other suitable material, such as fire-brick or asbestos, the tubes being spaced apart and the fire-brick, asbestos, or other suitable material being'located in the spaces between the tubes, or the walls of' the pas sages might be formed of tubes used in connection with sheets of fire-brick, asbestos, or other suitable material, such sheets being located either inside or outside the. wall of tubes.

are composed entirely of tubes.

In the construction shown the walls formed ing from the water-drum to the steam-drum. In the same way'the walls formed by the tubes ,70 and 71 are shown as extending from the water-drum 4'to the steam-drum. In this construction, therefore, the passage formed by the tubes 60 and 61 is entirelyindependent of the passage formed by the tubes 70 and 71.

' Theproducts which enter these two passages are carried through them and each passage delivers its products intoa chamber 11, which in'the form of boiler shown is located at the rear. This chamber communicates 'witha stack 12, also located at the rear in the form of boiler shown. If desired, however, the tubes forming the walls and maybe spread apart at the points where they join the steamdrum or from such points for a considerable distancebackward, so as to form along the steam-drum a common passage for the prodnets-that is to say,a part. of the products admitted into the passage between the tubes 60 and-61 will as they pass along the steamdrum mingle with a part of the products ad mitted into the passage between the tubes 7 O and 71. In this case the tubes 61 will form the top of a longitudinal passage extending along the steam-drum and the tubes 71 will The preferred form is that, however, illustrated, in which the walls of the passages formthe -bottom of said passage. The tubes in the groups 8 and 9 may also be arranged eithr to form two entirely independent passages or they may form passages which are connected at the top. Each group of the groupsof tubes 6, 7, 8,:and 9 may also be arranged, if desired, so as to form a plurality of passages which extend along and are parallel to thes'tfiflm-drum, the walls of these passages being formed by'an arrangement of tubes or of baffles, or of both.

The products'are preferably admitted substantially at one end of the passages formed by the several I groups of tubes, so that they may pass along the entire passage. The products thus come into contact at least once with all the tubes of each group and the products from the rear part of the fire are caused to 'comeinto contact twice with the tubes nearest the combustion-chamber. The products 1 may, however, be introduced into thepas- While it is preferred to form the walls of: the passages entirely of tubes placed close together, as before stated, the invention is sages elsewhere than at the ends, if desired.

When the products are to be admitted to the passages at or substantially at the ends, this maybe eifected in various ways In Fig. 2 the products are shown as admit- ;ted-to the passages through openings 63 73 83, :which are formed by omitting altogether or reducing the number of tubes 60, 70, and 80, which form the walls next the combustioncham erthepassage formed by the tubes and 91 in {the same manner; but'it is considered unnecessary to show this construction;

"In the modification illustrated in Fig. 3a flue 13 is arranged across the front of the boiler, which flue com mu nic'at'es both with thecomibllstion-chamber and with the passages be- I tween the several'groups of tubes;

by the tubes 60 and 61 are shown as extend- The products will'be admitted to In the preferredform of the construction jthe products of combustion are taken in at or substantially at one endof the passages formed by the several groups of tubes and are caused to pass along said passages and ;directly out'v at their opposite 'ends. n ay, however, be admitted to the passages elsewherethan at the ends, if desired.

In some cases, how- Insuch cases and in some othersit maybe found desirable to divide the passages formed by the groups of tubes either by arranging som'e of thein- 1 ner tubes to form a wall or by a suitably-lo- In boilers as ordinarily constructed it will ;usually be found that the heating qualities {of 'theproducts have been sufficiently ize'd bypassing once through the passage as :heretofo're described. ever, wherethe vertical height of the space in which th'e'boiler'is to be placed is necessarily'small and the upper steam-drum has to be placed very near the lower drums and grates, it may happen that the construction described will not sufliciently utilizethe heating qualities of the products.

of course the flue and stack will be located at that end of the boiler at which it is desired to have the products escape.

The water-drums may be connected to each other and to the steam-drum or directly to the steam-drum by any usual or desired arrangement of downtake-tubes.

It is not intendedthat the products shall enter the space between the inner groups of tubes. Suitable baflie-plates 14 may, if desired, be arranged along the inner sides of the inner groups of tubes in order to prevent the products from passing between the tubes at this point.

Any usual form of baffle or steam-separating plate may be used in the steam-drum, and such a construction is indicated at 15.

It will be noted that the individual tubes of each of the groups of tubes are bent, and this is the preferred construction, because of the wellknown advantages which result from the use of such bent tubes. The invention is not, however, confined to the use of bent tubes. Straight tubes may be used, ifdesired, or the groups of tubes may be made up partly of bent and partly of straight tubes.

Other changes in the construction of the boiler are possible and will suggest themselves to skilled mechanics. The invention is not therefore to be limited to the particular construction shown and described.

'What I claim is-- 1. In a steam-boiler, the combination with a st earn-d rum, of a grate, water-dru ms located C on each side thereof, groups of bent tubes connecting the steam-drum with the waterdrums, a part of the tubes of each group being arranged in passages for the products of combustion which run longitudinally of the boiler, the remainder of the tubes being arranged in the walls of said passages, and means whereby the products are admitted substantially at one end of said passages and allowed to escape at the opposite ends, substantially as described.

2. In a steam-boiler, the combination with two grates, of water-dru ms located on the outer sides thereof, a water-drum located between the grates, steam-separating means, four groups of bent tubes connecting the water-drum with the steam-separating means, some of the tubes of each group being arranged in passages for the products of combustion which run longitudinally of the boiler, and some of the tubes being arranged in the walls of said passages, and means whereby the products are admitted at one end of the passages and allowed to escape from the other, substantially as described.

3. In a steam-boiler, the combination with a grate, of a water-drum located on each side thereof, a steam-drum, groups of bent tubes connecting the water-drums with the steamdrum, some of the tubes of each group being arranged in passages for the products of combustion which run longitudinally of the boiler and some of the tubes being arranged in the walls of said passages, the said walls extending from the steam-dru m to the water-drums whereby the passage formed by each grou p of tubes is independent of the passage formed by the adjoining group, and means whereby the products are admitted to the passages, substantially as described.

4. In a steam-boiler, the combination with a grai e, of a water-drum located on each side thereof, a steam-drum, groups of bent tubes connecting the water-drums with the steaim drum, some of the tubes of each group being arranged in passagesfor t he products of combustion which run longitudinally of the boiler and some of the tubes being arranged in the walls of said passages, the said walls extending from the steam-drum to the water-drums, whereby the passage formed by each group of tubes is independent of the passage formed by the adjoining group, and means whereby the products are admitted at one end of said passages, substantially as described.

5. In a steam-boiler, the combination with a grate, of a water-drum located on each side thereof, a steam-drum, groups of tubes connectin g the waterdrums with the steamdrum, some of the tubes of each group being arranged in passages for the products of combu stion which run longitudinallyof the boiler and some of the tubes being arranged in the walls of said passages, the said walls extending from the steam-drn m to the water-drums whereby the passage formed by each group of tubes is independent of the passage formed by the adjoining group, and means whereby the products are admitted at one end of the passages and allowed to escape from the other, substantially as described.

6. In a steam-boiler, the combination with a steam-drum, of a plurality of grates, waterdrums located at the outer sides of the grates, a waterdrum between adjoining grates, groups of bent tubes connecting the steamdrum with the several water-drums, some of the tubes of each group being arranged in passages for the products of combustion which run longitudinally of the boiler, and some of the tubes being arranged in the walls of said passages, and means whereby the products of combustion are admitted substantially at one end of said passages and allowed to escape at the opposite ends, substantially as described.

7. In a steam-boiler, the combination 33th a steam-drum, of a plurality of grates, waterq drums located at the outer sides of the grates, a waterdrum between adjoining grates, groups of bent tubes connecting the steamdrum with the several water-drums, some of the tubes of each group being arranged in passages for the products of combustion which run longitudinally of the boiler, the tubes which form the walls of the passages which are next the combustion-chamber being arranged so as to admit the products at one end of the said passages, substantially as described.

8. In a steam-boiler, the combination with asieamd r'um,of apluralityof grates, water-- drums located at the outer sides of the grates,i a water-drum between ,two grates, groups of bent tubes connecting the steam-drum with the water-drums,some of the tubes of each group being arranged in passages for the products of combustion which run longitudinally;

passage formed by the adjoining group, and

means whereby the products are admitted at one end of said passages, substantially as described.

t 9. Ina steam-'boilerpthe combination with;

a steam-'drum,of.,a plurality of grates, water.- drums located at the outer sides of the grates, a-water-drum adjoining two grates, groups of bent tubes connecting the steam-drum with the water-drums, some of-the' tubesof each group being'arranged in passages for the prod- ;ucts of combustion which ,run longitudinally of the boiler, and some of the tubes being arranged in theiwalls of said passages and the said walls extending from the steam-drum to the water-drum, whereby the passage formed by each group oftubes is independent of the passage forined bythe adjoininggroup,means whereby the products are admitted at one end of; said passages, and a flue and stack arranged at theother end of said passages and with which said passages communicate, subistantially as described. a

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

. l JOHN PLATT.

Witnesses: I a

I A. V. BOURKE,

- T. F. KEHOE.

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