US633699A

US633699A - Feed-water heater for water-tube boilers.

Info

Publication number: US633699A
Application number: US72524199A
Authority: US
Inventors: Jiro Miyabara
Original assignee: Individual
Current assignee: Individual
Priority date: 1899-07-27
Filing date: 1899-07-27
Publication date: 1899-09-26
Anticipated expiration: 1916-09-26

Description

No. 633,699. Patented Sept. 26, I899. J. MlYABARA.

FEED WATER HEATER FOR WATER TUBE BOI LERS.

(Application filed July 27, 1899.)

(No Model.) 3 Sheets-Sheet l.

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No. 633,699. Patented Sept. 26, I899. J. MIYABARA.

FEED WATER HEATER FOR WATER TUBE BOILERS.

(Application filed July 27, 1899.)

3 Sheets$heet 2,

(No Model.)

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J. MIYABARA.

FEED WATER HEATER FOR WATER TUBE BOILERS.

lApplication filed July 27, 1899.1

(No Model.) 3 Sheets-Sheet 3,

NTE'D STATES PATENT OFFICE.

JIRO MIYABARA, OF TOKIO, JAPAN.

FEED-WATER HEATER FOR WATER-TUBE BOILE RS.

SPECIFICATION forming part of Letters Patent No. 633,699, dated September 26, 1899.

Application filed July 27, 1899. Serial No.725,24l. (N0 model.)

To (all whom it Hwy OOH/6877b.

3e it known that I, JIRO MIYABARA, a sub 'oct of the Emperor of Japan, and a resident of Tokio, in the Empire of Japan, have invented a new and useful Improvement in FeedlVater Heaters for ater-Tube Boilers, of which the following is a specification.

This invention has for its object to provide a simple, convenient, and efficient water-tube boiler in which there shall be an effective circulation of water and steam, and has more particularly for its object to provide a structure in which the water which is fed to the boiler may be circulated back and forth between the top drums or steam-chambers of the boiler, so as to become heated to a material degree by the escaping gases before it is permitted to escape into the said drums.

My present invention is more particularly directed to an improvement in the structure set forth in my British Patent No. 9,131, dated April 80, 1806, for improvement in water-tube boilers; and it consists in providingafeed-waterinlet-pipe which enters one of the compartments in a hollow casing in one of the top drums or steam-chambers, a plurality of se ries of feed-water tubes leading back and forth between the compartments in the said hollow casing and compartments in a-similar hollow casing in the other top drum or steamchamber, and a feed-water outlet-pipe leading from one of the compartments in the lastnamed hollow casing to the interior of the steam-chamber within which the said hollow casing is located.

A practical embodiment of my invention is represented in the accompanying drawings, in which- Figure 1 is asectional side elevation of my improved boiler. Fig. 2 is a front elevation, partially in section, of the same; and Fig. 3 is a sectional plan view showing the arrangement of the feedavater tubes and their adjacent parts.

The water-tube boiler to which I have applied my improved structure comprises two water-walls arranged to form the front and back of a combustion-chamber, each composed of horizontal cylindrical vessels arranged one above another and connected together by interposed junction-boxes or short vertical tubes, the upper drums of the two series being denoted by A A, which drums serve as steam-chambers. The two walls thus constructed are connected by sets of diagonal or inclined heating-tubes that extend across the combustion-chamber above the fire-grate, there being provided within the water vessels, except the top and bottom ones, diaphragms o1-deflectors,wl1ich are so arranged as to direct the streams of water and steam arriving from the upper ends of one of the lower groups of tubes into the lower ends of the next upper group of tubes, thereby permitting the remaining portions of the water-tubes to act as downtakes.

Flanged hollow casings B B are secured along the interiors of the hollow drums A A, which casings may be made of cast or wrought steel or other suitable metal and so constructed that they may be taken off in order to clean, examine, or replace the fecd-waterheating tubes. The said hollow casings are divided into a plurality of compartments by transverse partitions I) b.

A plurality of groups of feed-water-heating tubes 0 cross between the two uppermost cylindrical drums or steam-chambers, which tubes open into the several compartments in the hollow casings B B, so as to form a circulation back and forth, as indicated by the arrows in Fig. 3 of the drawings.

Sets of tubes D are located at each extreme side of the boiler, which tubes cross between the front and back steam-chambers A A and serve to convey the steam from the back steam-chamber A to the front chamber A.

A feed-water inlet-pipe E leads from some suitable source of supply (not shown) into the interior of the end compartment of the hollow casing B at one side of the boiler, and a feed-water outlet-pipe F leads from the end compartment of the hollow casing B at the other side' of the boiler, which outlet-pipe extends downwardly to a point near the bottom of the steam-chamber A and thence along the same for a considerable distance. This portion of the outlet-pipe F, which extends along near the bottom of the hollow drum orsteamcasing A, is preferably perforated, so as to distribute the water along the said chamber. By the structure hereinabove set forth the water being fed to the boiler is caused to circulate back and forth across the combustionchamber, so that the water is heated before it is permitted to be discharged into the back steam drum or casing.

It is evident that slight changes might be resorted to in the form and arrangement of the several parts without departing from the spirit and scope of my invention. Hence I do not wish to limit myself strictly to the structure herein set forth; but

What I claim is 1. In a water-tube boiler the combination with the front and back top drums or steamchambers thereof, of hollow casings located within the said top drums, feed-water-heating tubes crossing between the two drums and communicating with the hollow casings, a feed-water inlet-pipe arranged to enter one of the said hollow casings and a feed-water outlet-pipe arranged to lead from the other hollow casing, the said feed-water outlet-pipe having open communication with the interior of the drum within which it is located, substantially as set forth.

2. In a water-tube boiler, the combination with the front and rear top drums thereof, of feed-water-heating tubes crossing between the two drums, hollow casings located within the said top drums, the said casings being provided with partitions so as to form junction-pockets for the said feed-water tubes, a

feed-water inlet-pipe leading to the end eompartment in one of the hollow casings and a feed-Water outlet-pipe leading from the end compartment of the other hollow casing, the said water-outlet pipe having open communication with the hollow drum within which it is located substantially as set forth.

3. In a water-tube boiler the combination with the two top drums thereof and tubes connecting the drums at the extreme sides of the boiler, of feed-water-heating tubes crossing between the two drums intermediate the first-mentioned side tubes, hollow casings located within the top drums for receiving the ends of the feed-water-heating tubes, a feedwater inlet-pipe leading to one of the hollow casings and a feed-water outlet-pipe leading from the other of the hollow casings and in open communication with the interior of the drum within which it is located, substantially as set forth.

In testimony that I claim-the foregoing as my invention I have signed my name, in presence of two witnesses, this 6th day of July, 1899.

JIRO MIYABARA.

Witnesses:

JOHN McLEAN, K. GoYonE.