US1085241A - Sectional header for water-tube boilers. - Google Patents

Description

Patented Jan. 27}. I 914,

H. E. BOYRIB. SEGTIONAL HEADER FOR WATER TUBE BOILERS.

APPLICATION FILED APR.12, 1911. 1,085,241.

UNITED sTATEs PATENT OFFICE.

HARRIY EUGENE BOYRIE, OF SAN FRANCISCO, CALIFORNIA, ASSIGNOR or ONE 'HALF' A TO HAYDEN HOMER TRACY, or BERKELEY, CALIFORNIA.

SECTIONAL HEADER FOR WATER-TUBE BOILERS.

Specification of Letters Patent.

Patented Jan. 27, 1914".

Application filed April 12,1911. Serial No. 620,612.

To all whom it may concern Be it known that I, HARRY EUGENE Bor- RIB, a citizen of the United States, residing at the city of San Francisco, in the county of San Francisco and State of California, have invented a certain new and useful Improved Sectional Header for Water-Tube Boilers, of which the following is a specification.

This invention relates to sectional headers for steam boilers of the water-tube class generally, and is more especially adapted for embodiment in the sectional-header types employin sinuous headers and horizontal steam an water drums disposed above pluralities or banks of inclined Water tubes, such as are known commercially as Babcock and Wilcox boilers; the essential principles of the improvement, however, being also of practical value when employed in relation to other analogous constructions.

The main objects of the invention are to obtain the maximum output or extreme capacity from a boiler plant of the type mentioned, by permitting of forced or extreme firing, and reducing the cost of power; also to obviate the serious objection and fault found to exist at present, where, by reason of the slow circulation and discharge from the lowermost banks or rows of water tubes, said tubes become overheated with injurious results.

In the construction used at present all of the steam generated in the tubes must pass up through the headers to which they are connected, and then pass through the single nipple which unites the top end of each header-section with the steam and water drum. It follows, therefore, that the steam from the lowermost tubes, (which steam forms the major part of the steam from the whole boiler), must pass up through the entire length of the header and nipple. In-

stead, therefore, of these lowermost tubes 5 the banks of tubes incline upward from having'the easiest point of discharge, they are in reality the most retarded, due to the water of general circulation in the header, which offers serious resistance, due to its much greater density, and also due to the fact that the steam has the longest path to travel.

To the useful ends-of obviating all of these objections, and attaining the beneficial effect above alluded to, my invention consists, briefly speaking, but essentially, in dividing each vertical header-section horizontally into two separate chambers, and inserting within its walls, an auxiliary pi e or tube of less sectional area which shal tap the lower chamber only and extend interiorly of the upper chamber to a point above the water level in the main steam and water drum of the boiler, passing thereinto through the usual connecting nipple, in such manner that the steam and water first and most intensely subjected to the heat of the furnace may be quickly and freely discharged from such minor plurality of the lower ranges of tubes as alone enter the lower chamber of the header, directly into the steam space of the drum above, independently of the general circulation and clear of the steam and heated water passing from the major plurality of tubes enterin the upper chamber of the header-section anc l passing thence through the connecting nipple into the drum.

I will describe and illustrate my improvement in connection with an ordinary Babcock and Wilcox boiler, while dealing with the relief and discharge of the two lowermost rows of tubes, and employing sinuous sectional headers with the tubes staggered therein, it being understood, however, that I am not limited to the arrangement of the device in connection with the front headers, or where the tubes incline downward from front to rear of the structure, as the same or an equivalent effect is reached when the attachment is employed in the rear headers of those types of boilerssuch as the marine class-Where front to rear, or are otherwise varied in their general arrangement. J

For more complete comprehension of my is a front sectional elevation showing one drum and a plurality of sectional headersincluding my device. Fig. 3 is an enlarged vertical sectional elevation of sinuous headersection constructed according to my invention. Fig. 4 is a cross-section thereof on line 4:, 4.

For clearness, I will first describe the usual parts of a boiler with which myinvention is associated.

The numeral 10 indicates the front wall of the boiler setting, 11 one of the side walls, 12 the bridge wall, 13 the grate, and 14 the steam and water drum carried at a high level, all of these features being of the type,

known commercially as the Babcock and Wilcox boiler.

The water tubes are marked 15 and are disposed in decks, banks or rows, such rows being here staggered vertically and having their ends entering sinuous multiple headers, such tubes being also inclined downward from front to rear, the front headers only being indicated, at 16. Nipples 17, connect these headers with cross-boxes 18 and these in turn form open connection with the drum 14.

My present improved provided with an auxiliary circulating tube 19 of any suitable material, and preferably constructed in sections 20, 20, as indicated in Fig. 3, for convenience of insertion through the handholes, or otherwise, and of their assemblage within the sinuous-header section.

21 represents a bell or funnel mouth at the lower end of this auxiliary tube 19, and 22 a diaphragm extending entirely across the interior of the header 16, to form a lower or auxiliary chamber 23 therein entirely independent of the upper portion which forms the main chamber. The position of the diaphragm 22 preferably coincides with the bell mouth or 0 en lower end of the auxiliary tube; and t 's diaphragm may be cast or welded in, but it may be made separate and then cemented in, as this allows one to readily apply my invention to the headers of existing boilers. As illustrated, there is one auxiliary tube 19 for each of the header-sections of the boiler, located approximately centrally and vertically therein, passing from a point preferably just above the entrance of that row of tubes 15 which is second from the bottom (the diaphragm 22 beheader-section is ing located at or'near that point) upward 66 through the nipple 17 and cross-box 18 into the drum 14,. terminating in the steam space just above the water level.

The purpose and resultant effect of my invention will be apparent from the foregoing, inasmuch as a separate upward discharging passage-way or conduit is provided for the steam entering the header from those lowermost tubes designed to be relieved for the purposes named. This separate auxiliary chamber and conduit will allow a much greater upward velocity of a mixturev of steam and heated water from such lowermost tubes, of higher specific gravity than must characterize the mixture in the compartment in the header above, and consequently insure a correspondingly greater discharge into the drum than if the whole were obliged-as at present-to pass upward in one volume (of greater density) through the limited nipples and cross-box to the drum. The retarding effect on the flow of steam and water from the tubes, and all undue restriction of the circulation are thus entirely obviated ;and further, from the uninterrupted circulation afforded by'my invention, the steam bubbles quickly reach the steam drum, relieving the lower tubes and thus effectually preventing their softening by the fire and consequent distortions,while the steam is so quickly chance of injury to. these tubes is avoided, no matter how hard the boiler may be forced. This particular construction, it is apparent, will insure immunity from damage in cases where forced firing is necessary, and also largely enhance the steam output of boilers of this class, without other alteration to existing structures.

What I claim and desire to secure by Letters Patent is as follows:

1. In a water tube boiler, the combination with a suitable furnace; a'steam and water drum located at a high levelbetween the front and rear walls of the setting; a plurality of banks or rows of water tubes inclined downward from front to rear underneath the drum and connected to their respective headers; a front header composed of inclined or vertically disposed sections at right angles to and receiving the forward ends of the water tubes ;--of a bell mouthed transverse diaphragm near the lowermost end of each sectional header thereby dividing the header into upper and lower separate chambars; a removable jointed pipe within each header section and extending from the diaphragm to the water level in the drum.

2. In sectional headers for water tube boilers,a header-section comprising a sinuous shell having a plurality of handholes,--

a fixed cross-diaphragm bell-mouthed on its under side and dividing such header-section 95 carried off and replaced by water that all 4 pipe of less sectional area than the shell, in 5 horizontally into upper and lower separate the top of the shell, said pipe being fitted in chambers, the lower chamber receiving ends jointed sections. 1'

of a limited plurality of'the lowermost tubes In testimony whereof, I have signed in only of an installation,-and a removable the presence of the two subscribing witnesses.

HARRY EUGENE BOYRIE.

communication with said separate lower \Vitnesses:

vlmmber through thediaphragm and passing R0121". A. KELLoNn,

interiorly of the upper chamber out through OLIVER \V. JONES.

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