US819A - Improved mode of heating the blast in furnaces - Google Patents

Description

V 3 Sheets-Sheet l. I C. C. ALGER.

Hot-Blast Oven.

Patented June 30. 1838.

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/IIIIIII\\\\\\ AM PHOTD-LITHILCO N-Y.(0SBORNE'S PROCESS) 3 Sheets-Sheet 2. C. C. ALGER Hot-Blast Oven.

Patented June 30, 1838.

AM. PHDTO'LITHQCQNN. (OSBORNE'S PR CESS.)

3 Sheets-Sheet 3. C. C. ALGER.

Hot-Blast Oven. N0. 819. Patented June 30;. 1838.

AM. PHOTOLITHOJIU. N.Y. (OSEORNEIS PROCESS.)

UNITED STATES PATENT O ICE.

' CHARLES ALGER OFJSTOOKBRIDGEZ MA SACHUSETTS.

IMPROVED MODE OF HEATiNG T H E B LA'ST IN FURNACES.

Specification forming part of Letters Patent No. SN dated June 30:18:28.

'To all whom it may concern.-

. Be it known that I, CHARLES C. ALGER, of Stockbrid e, in the county of Berkshire and State of assachusetts, have. invented an Improvement in the Mode of Heating the Air'at. theTunnel-Head of Blast-Furnaces, to be used l as a hot-blast in smelting-furnaces; and I do"- hereby declare that the following is afull and exact description thereof.

. Modes of heating the air to be used for the hot-blast by thewaste heat of the top of a furnace stack have been devised and carried into operation by others, and it is only to the particular manner in whichI carry the heated air from'the tunnel-head'to the tuyeres that I intend to make any claim as belonging to me.

' My plan cdns'is'ts in forcing the cold'air from the blowing-cylinder through twelve or any "oid er preferred numberoftubes'piaced in maresents the first course of pipes,..that marked a being the pipewhich conducts. the blast from the blowing apparatus into the series of heating-pipes.

Fig. 2. shows the division of the dividingpipe, which is branched to carry the blast down on opposite sides of the stack. The pipe 0' conducts the heated air into the dividing-pipe DD. The top of the stack is shown at E, the lining of the furnace being designatedby the letter O. The outside wall of the heating-oven and furnace, one foot thick, is seen at L I. The flueway from the main heating apparatus is carried into the main chimney and divided,as shown in Fig. '3.

-' Fig; 4 represents in profileor side view the manner in whichthe tubes and elbows are plaeed inthe heating-oven. In this figure, a 7 represents the tube by which the cold air enters .the series, andBthat' from which the heated air escapes, through 0, Fig. 2, to the dividing and side pipes. The heating chamber or oven is so constructed thatthe ends of ih where the pipes are connected, can be readily removed for the purpose of making any necessary repair without'disturbing any part of the mason-work.

Fig. 5 exhibits a general section of the fur-' nace, showing the position of the pipesin the stack, which lead the hot-air from the tunnelhead to the tuyeres. In this figure, A shows the body of the furnaces; BB, the stone-work;

G O, the top stone-work and'level top house; 'D D, the tuyere-arches; E, the tunnel-head;

- extending to the tunnel-head. They are alsosecured .in their positions by stout staples of wrought-iron fastened into the stone-work.

A space, G'G, isallowed around the pipes to equalize the heat.' This space is continued around the crooked pipe H, Fig. 2',which is a section of the side pipe, showing its turn at the tunnel-head. I leave small holes at V V,

for the purpose of trying the heat ofthe blast; X represents the place of the mercurial gage, for showing its pressure. 4., make the places where there may be small doors to be opened for the purpose ofcleaning the pipes from dust, and Vt a door to take out the dust and to regulate the heat by opening or closing. There is one such door at each end. The dotted lines in this figure show'the direction of the chimney-flue to the heating-oven arch 2.

--Instead of the mode above described of arranging the flues near the tunnel-head for heating the air, I intend sometimes to adopt the following,wh ich I have essayed and found to answer the intention perfectly well, the air heated in these tubes being in either case couducted down to the tuyeres through tubes inclosed in the body of the stack, to preserve and augment the heat, as described:

Fig. 6 is a vertical section of the chimney. with the heating-oven andthe tubes arranged therein, and Fig. '7 is a top view, intended to show more perfectly the manner inwliich the tubes are connected together. The pipes or.

tubes ddd are laid horizontally, and the tube.

0 e e 0 rise vertically from them, being bent into the form of the letter U inv rted, orhav- Nos. 1, 2, e, 4,,Fig.

2 sis ing semicircular fiubes csnnecting them an 5 for the purpose ofrep'air-ifig the heating-tubes their upper ends anti. fitted rim-0 them by C-QIIii without disturbing anyother part of the structcal joints 0? oi-herwiwe, fire. The: double chimmey. shown in Fig. 1 en- The manna-1f a-nii combining the i ables me, the use of the necessary damptubes e e? e so t-o'conduct t me air from one 0f I ers, to govern the passage of the flame and the horizontal $111185 10 another will be readilv heated air Lnmugh the heating-.oveu with the perceived bythedmwings The vertical'bub utmost tummy. touch each obher at iheir' upper 01." cm" 1 $711361 claim 2* instituting my invention ends, ar a thus mutually suppcrt enah w the an: mums of the above-described The manner 0f "winging down the heated a to the my shrough tubes built in the :vfly of the stack, herein set forth.

CHAS. 'G. ALGER.

jwfiich is'importa'ntin the highly-heated to which they are brought when in use.

descending pipes, which carry the heateu a to the tuyeres, are immgdiately under and a a continuation, of the horizontal tubesff, cold air from the bldwing apparatus 45mm 1 at g. The two ends 0f the heating-even i 1 i Vi'itmsses:

are built u with fire-brick or other masonry, g limm'rioBYINGTON,

t VALTIEIR \Vmm-i'r.

so as to form panels which may be takendown

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