US1128700A

US1128700A - Steam-generating boiler.

Info

Publication number: US1128700A
Application number: US67579212A
Authority: US
Inventors: Luther D Lovekin
Original assignee: Individual
Current assignee: Individual
Priority date: 1912-02-06
Filing date: 1912-02-06
Publication date: 1915-02-16
Anticipated expiration: 1932-02-16

Description

L. D. LOVEKIN.

STEAM GENERATING BOILER.

APPLIGATION FILED I'EB.6, 1912.

j mwmwo Patented Feb. 16, 1915.

3 SHEETS-SHEET 1.

WITNESSES:

Aw ATTORNEY L. D. LOVEKIN.

Patented Feb. 16, 1915.

3 SHEETS-SHEET 2.

WA TTORNEY -L. D. LOVEKIN.

STEAM GENERATING BOILER. APPLICATION FILED FEB. 6, 1912;

IIJIQQJYQQD Patented Feb. 16, 1915.

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specifioatibn oil-enters ltatent.

Patented'Febt 1th, 19 15..

Application filed reeru'ar 6,1912. swarm. 675.79 2.

Toa'll whom it may concern Be it known that l, Lo'r'rmiz D. LovnKIN, a citizen of the United States of America, residing in 'the'city and cou'nty of Philadel- 5 phiaf'in the State of Pennsylvania, have invented'a certain new and useful Improvement in Steam-Generating Boilers, of which the followin'g isa'true and exact description, reference 'being'had to the accompanying drawings, which form a part thereof;

My present invention consists in an improved steam generating boiler of the water tube type especially adapted "for oil firi'ng' and suitable for marine service.

The primary object of the invention is to provide a simple and efiective boiler construction for the purpose specified characterized by the provisions made for. obtaining a large combustion space and for regulating the 'clrculati-on of the hot gases through the The various features of novelty which characterize my invention are pointed out with particularity in the claims annexed to and'forming a part of this specification.

For a better understanding of the invention, however, and the advantages possessed by it, reference should be had to the accompanying drawings and descriptive matter in which l have illustrated and described a preferred form-in which my invention may be embodied.

0f the drawings, Figure 1 is a front elevation of a marine boiler constructed in accondance with my invention with the oil burners and provisions fonregulatiug the admission of 'air to the combustion space removed. Fig. 2 is an elevation of a portion of the water tubes and the provisions employed in' conjunction therewith to provide a bafie tor the hot gases. Fig. 3 is'a section on the line 33 of Fig. 2. Fig. 4-is a sectional elevation taken on the line 4- 4 of Fig. 1, with a portion of the boiler broken tion on the line 5'-5 of Fig. 4. The boiler construction shown by the drawings comprises an upper horizontal steam and water drum A and a lower pair of horiz'o'ntal water drums B, B, parallel to the drum A anddisposed at oppositesides thereof. The..retJ.1,rn connections 0 amd'C' connect the frontend of the'drun'i A to the front ends of the drums B', B, and the rear ends of these drums are similarly cbnnected by the return connections D and D. Each away. Fig. 5 is' a partial sectional eleva:

drum'B is also connected to the drum A by a corresponding set or group of curved Water tubes E. The boiler housing F is suitably lined and covered with heat insulating material, indicated at F and F and incloses the two groups of water tubes C and the major portion of the steam' and water drums A. The water drums B, B, have their body portions embodied in the housing wall,

the portion of these drums extending beyond the housing proper beingcovered with suitable heat insulating material F The return connections C and C and l) and D lie beyond the end walls of the housing proper as do the ends of the drums A and B,

B, between which these connections extend. The front end of the boiler housing is provided in its upper portion witha series of suitably disposed cleaning doors'F opening into the upper portion of the combustion space, and openings F for the oil burners.

are formed in the front end wall of the housing in front of the combustion-space G. In:- asi'nuch as the character of the oil burners at all in :Fig. 1, although the oil. burners J are shown in outline in Fig. 4. A metal wall K in front of the boiler below and between the return pipes C 0 forms the outer wall ofan air chamber surrounding the burners J, and doors K are provided to control the admission of air into this air chamber.

The tubes E extend substantially vertical:-

for oil firing. To confine-'thehotgase's and prevent them' from passing appreciable amount directlyinto the lower portions of the, groups of tubes E, I provide bafies H, H, at the inner side'of each tube group E adjacent the lower ends-of the tubes. shown, the baiiies- H are formed of bricks h, each of a width on the side adjacent the combustion chamber slightly less than one half the distance between the centers ofthe adjacent tubes in the inner row. Each of of one of the tubes-1E. In the assembledbame each brick is locked in place between" one of the tubes E and the brick h engaging the adjacent tube. The bricks are shaped to provide a slight air gap it between the I inner sides of the two opposing bricks at the opposite sides of a single tube E, and a somewhat larger air gap h at the outer side of the baffle. The lower edges of the bafiles H are slightly above the lower ends of the inner rows of tubes E.

As shown, the inner rows of tubes are formed withreversely curved portions E which give increased thickness to the groups of tubes, ,As shown the curvature of these portions E is sufficiently sharp to prevent the baffle bricks h from sliding down on the supporting tubes-below the position occupied by them in the drawings. To cause the hot gases "entering the groups of tubes E above the'bafiles' H from passing directly to the passages G between. the boiler housing and the outer. tubes E, baflles I are placed on the outer sides of the two tube groups extending from the drum A nearly to the. level of the tops of the baflies H. Ahood I extends fromthe tops of the baifles I' about the upper half of the drumA and shields the latter from direct contact with the par tially cooledwaste gases passing through the channels G, to'the outlet'passage G By preference the-upper ends'of the tubesin each group are spread apart :as shown to provide an intertube space diminishing in cross-section from the steam' and water drum A along the tubes approximately to the plane connecting the top edge of bafiie H and the bottom edge of the bafile I. With the arrangementofwater tubes and-baffles described the bulk of the highly "heated gases passing out of the large combustion space G proper, enters the intertube space above the baflies H and then passes across and down along the tubes E to the outlet M channel G. The path of the hot gases is indicated by the arrows in Fig. 5.- As the hot gases pass into and-down from the upper end of the intertube space in eachfigroup of tubes E, thevolume of the gases diminish as they impart their heat to the tubes E, and the similar decrease in volume of the intertube space, as the distance from the steam and water drum A-increases, gives a desirable uniformity in the speed with which the hot gases pass through the intertube space. With the circulation described, the flow of hot'gases along the tubes E is for the most part downward and counter to the direction' of flow of the ascending water in the tubes E so that the upper endsof the tubes E are heated to a higher temperature than are the lower end of the tubes E. The gap between through the gap into the combustion space,

and moreover the current of hot gas passing through this gap tends to carry the finer soot particles along with it. With the construction described it is apparent that the water circulation through the tubes E will be upward from the drums B to the drums A, and an adequate return flow of water from the drum A to the drums B is insured by the large and unheated return connections C and C and D and D.

While in accordance with the provisions of the statutes I have illustrated and described the best form of my invention now known to me, it will be apparent to those skilled in the art that changes maybemade in the forms of the apparatus disclosed without departing from the spirit of my invention, and that under some conditions certain features of my invention may be used with advantage without a corresponding use of other features.-

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

1. A boiler comprising a pair of spaced apart water drums and a steam "and water drum located above and between the water drums, two outwardly bowed groups oflower portion of the inner side of each group of water tubes, the lower edge of said baflie being somewhat spaced away from the adjacent water drum, a bafiie arranged along the upper. portion of the outer side of each group of water tubes whereby a relative large portion of the hot gases from the combustion chamber is caused to enter the spaces between the tubes in each group adjacent the upper end of the latter and then pass down by the second mentioned baffle, and a relatively small. portion of the hot gases is caused to enter the spaces between the tubes in each group adjacent the lower end of the tubes, the tubes in each group being spread apart adjacent their upper ends'whereby the volume of inter tube space in each group diminishes as the distance from the steam and water drum increases.

2. Awboiler comprising a pair of spaced apart water drums and a steam and water drum located above and between the water drums, two outwardly bowed groups of Watertubes, one connecting one and the other the second of said Water drums to the steam and Water drum and uniting to form the top Wall of a combustion chamber, return connections between the ends of the steam and Water drum and the ends of the Water drums, a bafile arranged along the lower portions of the inner side'of each group of Water tubes", and a baflle arranged" along. the upper portion of the outer side of each group of water tubes whereby the hot gases from the combustion chamber are caused to enter the spaces between the tubes in each group adjacent the upper end of the ing spread apart adjacent their upper endswhereby the volume of the inter-tube space in each group diminishes as the distance from the steam and Water drum increases. LUTHER D. LOVEKIN. Witnesses:

ARNOLD KATZ, D. S. STEWART.