US1297582A - Forced-draft system and smoke-consumer. - Google Patents

Description

F. P. MILLER.

FQRCNDRAFT sYsEMAND SMOKE CONSUMER.

APPLICATION FILED APR. 6,1918.

Patented Mar. 18, N19.

oooowosu gal/manic@ FREEMAN 1. MILLER, 0E BALDWINsvILLE, NEW YORK.

FORCED-DRAFT SYSTEM AND SMOKE-CONSUMER.

Specification of Letters Patent.' Patented Mal, 18, 191,9.

Application filed April 6, 1918. Serial No. 227,027. I

To all whom t may concern:

Be it known that I, FREEMAN P. MILLER, a citizen of the United States of America, and resident of Baldwinsville, in the county of Onondaga and State of New York, have invented certain new and useful Improvements in Forced-Draft Systems and Smoke-Com sumers, of which the following is a specica.- tion.

This invention relates to steam boiler furnaces and particularly to a smoke consumer and fuel saver for such furnaces and the said invention relates particularly to means for feeding air and steam to support combustion in a steam boiler furnace.

An object of this invention is to provide novel means whereby air is fed under the grate bars and directed upwardly through the grate bars under a pressure suiicien-t to create a forced draft and hence it results in preventing the formation of clinkers and insures an even temperature which can be controlled by the supply of air and the pressure at which it is furnished.

A further obj ect of this invention is to provide means for feeding| steam to the products of combustion issuing from the, fire box for allaying smoke and insuring more complete consumption of the products of combustion as they pass over the bridge and prior to their circulation through the draft tubes of a boiler.

It has been found in practice that a device embodying the invention eects a reduction in the coal consumed, a vast proportional reduction in the ashes, while at the same time, it prevents fouling of the tubes and otherwise effects a saving as compared with known methods.

With the foregoing and other objects in view, the invention consists in the details of construction, and in the arrangement and combination of parts to be hereinafter more fully set forth and claimed.

In describing the invention in detail, ref- Y erence will be had to the accompanying drawings forming part of this specification, wherein like characters denote corresponding parts in the several views, and in which- Figure 1 illustrates a horizontal sectional view of a fire box with the invention applied thereto; and

Fig. 2 illustrates a vertical sectional view.

In these drawings 5 denotes the rate bars of a steam boiler furnace, 6 the fire ox, 7 the ash pit and 8 the bridge, which parts may be of ordinary arrangement as it is the purpose I one of the walls of the ire box and preferably parallel with the front wall of the fire box.v A blower 10 is coupled to the outer end of the header and the blower may be driven by a motor 1l and connected by a belt or the like 12. I do not wish to be limited with respect to the manner of driving theblower, however, as it may be driven from an engine by suitable connections from a main drive shaft which arrangement will be understood by those skilled in the art and need not, it is thought, be illustrated in detail.

A series of pipes 13 are coupled to the header 9 and they preferably extend horizontally and rearw-ardly from the front wallv of .the fire box and preferably under the grate bars. The pipes 13 have perforations 14 for discharging air and these perforations are on the Lipper sides of the pipes so that the air discharged is in the general direction of the draft and through the spaces between the grate bars. Owing to the fact that the pipes are well distributed throughout the area of the grate bars, the air can be forced through the grate bars practically throughout the area of the re bed so that there will be uniform combustion of the fuel throughout thel said area. The inner ends of the pipes 13 are closed by caps 15 which may be threaded or otherwise applied to them, and hence air can only escape from the pipes through the Y perforations. Y

A perforated pipe 16- is stationed transversely of the burners back of the bridge and has a coupling 17 with a pipe 18 leading to a source of steam supply which may be the boiler of a furnace and the pipe has a valve 19 by which steam may be controlled. The pipe 16 has a cap 20 at its' end so as to prevent escape of steam except through the apertures and they are so arranged as to diffuse or distribute the steam so that it will intermingle with the products of combustion passing over the bridge and aid in the more complete consumption of the products and the arrest of smoke so that the products of combustion passing through the iiues will be free of dense smoke and will have an increased heating eifect as compared with the products of combustion 'passing through ilo tubes if the air and steam feedingl means were not employed.

The pressure of the air may be controlledY Control of the valve 19 and the'feeding of the air or vapors for supporting combustion may be regulated, according to the condition of the fire.

I claim: p

l. In a steam boiler furnace, having a grate and fire box, an air feeding pipe, a plurality of perforated pipes in communication therewith and extendingl under the grate, said' perforated pipesl having their inner ends elosedxmeans for supplying air to the first mentioned pipe, and a perforated pipe extending transversely of the furnace back of the fire box, and means for supplying steam thereto. i

2. In al steam boiler furnace having a grate and lire box, an air feeding pipe, a plurality of perforated pipes in communication therewith and extending underrthe gra-te, said perforated pipes having their inner ends closed, means for supplying air vto the first mentioned pipe, a blower on the. irst mentioned pipe, means for operating the blower, a perforated pipe extendingtransversely of the furnace back of the fire box,rand means for supplying steam thereto.

FREEMAN RMLLERQ i Copies' of this patent maybe' obtained for :fiveY dents Veach, by addressing the Commissioner of Patents,

Washington, D. C.

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