US1085001A - Furnace. - Google Patents

Description

W. ANDERSON, J. MEIKLE & G. W. FULTON FURNACE.

APPLICATION FILED APR.28.1913.

1,085,001; Patented Jan..20,1914.

- 5 c I WiMesses- "m 2 W conveyer increases PATENT @FFIC.

WILLIAM ANDERSON, OF HELENSBURGH, JAMES MEIKLE, OF GLASGOW, AND CHARLES WILLIAM FULTON, OF PAISLEY. SCOTLAND.

FURNACE.

' Specification of Letters Patent.

' Patented Jan.20,1914c.

Application filed April 28. 1913. Serial No. 764,194.

land; Glasgow, Scotland, and Paisley, Scotland, have invented a certainnew and use ful Improvement in Furnaces, of which the following is a specification.

This invention relates to furnaces, esp'e steam generators, e. g,

cially furnaces for furnaces for generators of the type having one or more flues, as described in the specification of our co-pending application filed" Aug-12, 1912, No. 714613. p

The invention consists in a new construction of conveying means for removing ash.

In the accompanying drawings F igure' 1a is a part elevation, part longitudinalisection; Fig. 2 is a cross section showing a furnace of the type referred to fitted with a conveyer embodying the invention.

Referring to the drawings, the fuelsupportcomprises a substantially V-shaped grate composed of two series of oppositely inclined bars A for supporting the fuel and merging at the lower edges of the V into the sldes of an ash-receiving channelor trough B which is open on top and closed at the bottom and which is disposedlongitudinally of the flue B of a steam generator. \Vithin said trough or channel B is fitted a helical conveyer C for removing ashes, which is interrupted at several points along its length, the depth and pitch of the thread being uniform, the length of the increasing the furnace and the interruptions being of unequal extent, decreasing toward the front of the furnace, so that the capacity of the progressively in the direction toward the discharge outlet C thereof. As will be seen, the first convolution of the helix commences at the end of the trough remote from the outlet. It will be, understood that the rearmost section of the con- -veyer should remove only its own quota of ash, 2'. 6., the ash lying immediately above nearer the discharge flights of the screw threads I progressively toward the front of the same; the following section i. 6., that outlet G at the front of the furnace, should convey not only its own quota of ash but also that delivered by the rearward section thereto, andso on, so that the capacity of, the conveyer will, in-

crease progressively from the bridge wall to the outlet. ,For crushing large pieces of clinker the plain parts of the conveyer (J (21.6., where the screw threads are omitted) may be formed with spikes G The conveyer C is made up of short lengths or screw-threaded sections strung on to a shaft of polygonal formation in cross section, one or more distance pieces or nonthreaded sections being interposed to afford the interruptions abovereferred to. In this way adjustment of the relation of the various flights to that of the intervening nonthreaded sections to meet varying requirements, can be readily effected.

What we claim is 1. In'a furnace, the combination of a grate having inclined sides and an ashreceiving trough into which the inclined side-s merge at their lower edges and which trough is provided at one end with a dis charge outlet, of a rotary conveyer located in said trough and extending from the opposite extremity of said trough to said outlet, said conveyer comprising a shaft of noncircular formation in cross section, and screw threaded and interposed non-threaded sections strung on said threads being ofuniform depth and pitch, the screw-threaded sections being of. unequal lengths, increasing progressively toward the shaft, the screw discharge outlet, and the non-threaded sections being of unequal lengths, decreasing toward said outlet.

2.-In a furnace, the combination of a grate having inclined sides and an ashreceiving trough into which the inclined sides merge at their lower edges and which trough is provided at one end with a dis charge outlet, of a rotary conveyer located in sai trough and extending from the opposite extremity of said trough to said outlet, said conveyer comprising a shaft of nonn" u 0 n circular formation v 1n cross sect1on, and In testimony whereof we have signed our screw-threaded and mterposed non-threaded names to this speclfication 1n the presence of sections strung on said shaft, the screw two subscribing Witnesses.

threads being of uniform depth and pitch, the screw-threaded sections beingof unequal 3 len ths increasing progressively toward the 1 diszhar ge outlet, the non-threaded sections CHARLES WILLIAM FULTON being of unequal lengths, decreasing toward Witnesses said outlet, and belng provided with radial WALLACE GRANSTON FAIRWEATHER,

10 breaking projections or spikes. i J 01m MCGLEARY.

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