US1201442A - Water-tube steam-generator. - Google Patents

Description

L. E. CONNELLY.

WATER TUBE STEAM GENERATOR.

APPLICATION FILED FEB. 12. 1916.

1,201,442. Patented Oct. 17,1916.

2 SHEETS-SHEET 1- L. E. CONNELLY.

WATER TUBE STEAM GENERATOR. APPLICATION HLEDFEB.12.I9I6..

1,201,442. Patented 0ct.17,1916.

2 SHEETS-SHEET 2.

1 S PA LAWRENCE E. CONNELLY, 0F CLEVELAND, 01110..

WATER-TUBE STEAM-GENERATOR.

Specification of Letters Patent.

Patented 00am, 1916.

Application filed February 12, 1916. Serial No. 77,966.

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, reference being had to the accompanying drawings, and to the letters of reference marked thereon, forming part of this specification.

My invention relates to' water-tube steam generators of the Sterling type, and has for its object to increase the effective distance between the water level in the boiler and the steam outlet. This I accomplish by locating the upper drums of the boiler at different elevations with relation to each other, so that one of them will at all times be entirely filled with water, the next will be substantially half filled with water, and'in which all the steam generated, will be liberated, and the next will be substantially one-quarter full of water, and from which the steam liberated in the second, will be withdrawn for use.

The features of my invention will be explained and pointed out hereinafter. and are illustrated in the accompanying drawings, in which:

Figure 1, is an end view in elevation of a water-tube steam generator with the setting thereof in section. Fig. 2, is a like view of an alternative construction embodying my invention.

In these drawings A, indicates a lower, or mud drum; B, indicates a water receiving drum; C, indicates a water and steam drum, wherein the steam is liberated from the water; and D, indicates a steam receiving drum, which receives steam from the drum C, as hereinafter described; D, indicates a feed water' supply pipe, through which preheated feed water is supplied to the drum D, from any suitable source, (not shown). The mud drum A, communicates with the drum C,-by means of up-fiow water tubes E and E, preferably through the drum B, which serves as a header-to eflect communication between the two series of tubes E and E, and, the drums C and A, communicate by means of down-flow water tubes F,

which conduct the water in the drum C, which hasnot been converted into steam, back to the mud drum A.

G, lndicates a series of steam conveying tubesthrough which steamwhich has been liberated in the drum C, flows into the drum D, from which it flows through the connect1on d, to its point of use. The drum D, communicates with the drum A, by means of a series of down-flow water tubes H,'

which conduct the feed water from the drum D,-to.the drum A. v

J, indicates a blow-ofi' pipe, and J, indicates a shut-off valve therein.- Above the series of ,up-flow tubes E, I place a baflie-' k, which compels the fire gas to travel upward along the tubes E and E, and over against the tubes F. Above the tubes E, I place a baffle-wall L, which in the construc tion shown in Fig. 1, extends from the drum B, to the drum C, and operates to pre vent the fire gas from flowing above the tubes E. Above the tubes F, I place a baflie-wall M, which does not extend entirely to the drums A, and C, the upper end thereof extending upwardly between the drums C and D.

From the upper portions of the baflle-wall M, a baflie-wall M, extends to the drum D, having a contracted opening m, therein through which a small portion of the fire gas may flow. The wall M, is also provided with a lateral extension m, to cause the fire gas passing around its lower end to flow toward the tubes H.

N, indicates the rear wall of the boiler setting from which short baffle-walls n n, extend to throw the fire gas toward the tubes H, during their upward passage to the smoke exit N.

0, indicates the front wall-of the boiler setting which is provided. with a deflecting wall 0, to cause the fire gas to be deflectedtoward the tubes E.

P, indicates the fire wall in front of the mud drum A;'and P, indicates the furna e grates.

R, indicates the top of the b01161 settin which extends from the front wall 0, to the rear wall N, covering the drums C and D,

there are two generators like that shown in w-m; heat flows upwardly from the furnace and around the ends of the bafile-walls as indicated by the curved arrows and out through the smoke exit N a small portion of the fire gas flows over the upper end of the baflle-wall M, into the chamber under the cover R, between the drums C and D, whence it is drawn-through the contracted openingm, in the wall M,-so that the tubes G, in the upper part of said chamber are subject to. heat as if in an oven, while the main portion of the volume of fire gas passes around the lower end of thebafile-wall M, and upward along the tubes H. As the water in the tubes E, is heated, it flows upward through the drum B, and tubes E, into the drum 0, where such portion as has become steam is liberated and'fiows throu h the tubes G, into the vdrum D, while t e residue of the Water in the drum C, flows downward in the tubes F, to the drum A, to again flow through the tubes E, as before with an addition thereto of sufficient fresh water from the drum D, (which is kept supplied by means of the feed-water 'pipe D) through the tubes H, which during its downflow throughthe tubes H, has become heated to the temperature equal to that which flows downward in the tubes F,;' for While the fire gas which contacts with the tubes H, has been lowered in temperature somewhat, the flow of water through said tubes is slower than in the tubes E and'F.

The water in the tubes. E and .E, travels very rapidly, and on entering the liberating drum 0, from the tubes E, its force greatly agitates the water in the drum C, which, when the steam is withdrawn from the drum C, as in ordinary constructions, in

many instances travels with the steam into the super-heater, where, during the process.

of super-heating the steam, the water carried with the steam .is transformed into steam. By means of my mvention. hereinbefore described, the steam which hasbeen liberated in the drum C, is conveyed by the tubes G, through the hot chamber between the drums C and D, into the drum D, wherein there is no turmoil in the water contained therein, and during the traverseof" the steam through the tubes G, whatever water enters the tubes Gr, along with the steam, is therein transformed into steam; so that steam which may be discharged from the generator through the steam line connection 03, will be free from water, as there is no foaming or agitation present in the drum D. It will be obvious that the liberated steam while passing through the tubes fi, will be subjected toa baking process, so that the drum D, will contain only dry-steam and that the effective distance between the water level in the drum D, and the steam outlet, will be sufficiently increased by my invention, '50 that the dry steam which enters the drum D, from the tubes G, will not be detrimentally aifected by the still water therein.

In Fig; 2, the How of water in the tubes E, E, F and H, is the same as in Fig. 1, while the fiow of steam through the tubes G, is also the same. It will be observed that the flow of the fire gas and the flow of water in the tubes is in the same direction, except in-the case of the tubes H, wherein the water flows in a direction opposite to the How of the fire gas.

Having thus fully illustrated and described my invention so that those skilled in the art can utilize the same, I do not desire to be limited to the exact arrangement of apparatus shown, as many changes therein can be made, Without departing from the spirit of my invention, but

What I claim as newand desire, to secure by Letters Patent is:

Ina water-tube steam generator, a firewall, a furnace grate, a lower Water drum behind said fire-wall, a water drum above the front end of said furnace grate and below the water level, so as to be at all times filled with water, up-flow water tubes connecting said drums, a steam liberating drum vertically above the rear end of said furnace grate and partially above the water level, up=flow water-tubes connecting the same with the second mentioned drum, down-flow water tubes connecting said steam llberating drum and said lower drum, :1.

steam and feed-waterzreceiving drum behind said steam liberating drum and at a higher' level with relation thereto, a steam dischargepipe-connection on said steam and feed-water receiving drum, a series of downfiow water tubes connecting said. last mentioned drum and said-lower drum, and a series of steam conveying tubes connecting said steam liberating drum and said steam and feed-Water receiving drum whereby steam liberated in said liberating drum, will be conveyed into said steam and feed-water receiving drum before being discharged from said generator. 7

In testimony whereof I afiix my signature.

LAWRENCE E. CONNELLY.

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