USRE9907E - siemens - Google Patents

Description

3 Sheets-Sheet 1.

.IIHIHIHIV Reissued Oct. 25,1881.

C. vW. SIEMENS.

REGENBRATIVE GAS FURNAGE.

T 0 Irv .n e w w ai CHARLES WILLIAM SIEMENS, OF WESTMINSTER, ENGLAND.

. SPECIFICATION UNITED STATES PATENT OFFICE.

COUNTY oF MIDDLESEX,

eteamz,nA-rive: GAS-FURNAGE.

'forming part of Letters PstentNo. 9,967, dated October 25,- 1381.'

Original No. 113,584. dated April 11, 1571. Application for reissue tiled December 1, 1880.

DIVISION A.

To all whom it may lconcern Be it known-that I, CHARLES WILLIAM Sm MENS,ot"Westminster, in the county of Middlesex, England, have made a new and useful invention having reference. to. Regenerative Gas- Furnaces, of which the following isaspeciiicalOll.

My invention relates to that class of furnaces for which Letters Patent of the United States numbered 89,441 were granted to me April 27,

. 1869; and the naturethereofconsists in certain modifications in the construction of thesame,

whereby the air is made to issue into the furnace in diverse directions above the com bustible gas, the gas is deflected horizontally into the furnace, the gas and air become thoroughly intermixed, the air is prevented from coming into contact with the metal or other substance on the bed ol' the furnn, the gaseous'products of combustion are made to circulate through. a charging-chain her, and other ad vantages are Obtained, :ls hereinafter described.

In the accompanying plate of drawings, in which corresponding parts are designated bysimilar letters, Figure 1 is a vlongitudinal seotion of t-he'furnace on the line 8 8 of Fig. 3.

Fig. 2 is a transverse section on the line 9 9 of Fig. 1, and Fig. 3 shows a sectional plan on the line 10 10 of Fig. 1.

In a furnace constructed according to my present invention the general arrangement of the regenerators is similar to thatshown in the above-mentioued Letters Patent-that is to say, the four regenerators F F F F' are ar.

ranged in pairs and vary in size, the smaller being for the passage of the gas and the larger f r that of air, their proportions being in the gtio corresponding to the Quantities of gas and air required to facilitate complete combustion in the heating-chamber. The regenerator-walls are built of fire-brick or other refractorymaterial, and are made gas-tight, so

that no Teakage may take place from one chamber to the other. The regenerative chambers F F F' F are filled with lire-brick stacked loosely together, and communicate bymeans of dues or passages withthe furnace Bin such a manner that the air enters the furnace above equal temperatures tends to sink f cating with the air-regenerators andl by its superior specicgravity at through the gas and intermix therewith. The gas dues or the gas,

passages() C com municating, between the gasthe furnace are separated or passages D D' communiand `the furnace by a series of partition-walls'.`

One of the principal advantages of my present invention over those which have been hereregenerators and from the air ues tofore patented consists -in the peculiar construction of sages C D C' D for effecting the mixture of the heated combustible gases and ain rising from the regenerators F F F' F'. The air-pas'- sages D D' are raised very nearly to the roof of the furnace, while the gas-passagesUC' open 4into the chamber B at a 'considerably' lower point, as shown at Fig. 1, and the sidewalls,

ward the chamber B in a converging manner until they meer, as shown'in Fig. 3, thus'form ing widening passages E E for the gas to issue through. l

Another highly important part of my pres--` ent invention consists in detlecting and-directing the ascending gases by means of slabs N fixed over the vertical passages C C', and causthe combustible gas and air pas- 6o 'G G', of the air-dues are brought forward toing them to enter into the furnace in a? hori- 'zontal direction under the heated air, thus preventingthe latter lfrom coming into'immediate contact with the coutents'of'the furnace.

Another modification in the details of the' construction of regenerative furnaces shown in my present invention consists in the enlargement or expansion of the upper ends of the airpassages, whereby the air is deflected toward the lheating-chamber and dows into it'in an inclined direction.

Another feature of my invention consists in the addition to the furnace of a heating-chamber, A, which may ore before introducingit into the melting-chamber. -The substance to be treated in this chamber may be introduced through the door A',

and then heated to the requisite degree by the he-used for the reception of go radiated heat, or by dame from the furnace, a 95 portion of such flame or hot gases being caused to enter the chamberA through the aperture B', audio circulate through the same by means of the chimneys A, thetops of which are provided with slabs A for regulating the draft. r),he operation of the furnace is as follows: The waste gases from the furnace B are drawn down through'one pair of regenerators, F F',

The current of hot gases is drawn downward through this pair until a considerable depth of brick-work near the top is uniformly heated to a temperature nearly equal to 'that of the entering gas, the heat of the lowerport-ion decreasinggradnally down ward at a rate depend'-V ing on the velocity-of-the current and the size and arrangement of the bricks. The direction ofthe draft-is'then reversed, the current of the. waste gases is employed to heat thcsecond pair of regenerators, F F, and the .gas and air ventering the furnace are passed in the opposite direction through the rstpair of regenerators, F F', rand coming into contact, in the lirst instance, with the cooler brick-work below are' gradually heated as they ascend, until at someA distance from the top they attain a temperatnrenearly equal to the initial heat ofthe waste the ues C and B meet and at once ignite, pro-.

duciug a strong'ilame. The air enters the furnace in diverscorfdivergent directions above v the gas, and by reason of its superior specific air and gases become thoroughly iutermixed and complete combustion is e'ected, while any uncombined air remaining at the roof of the furnace is prevented from coming into contact withthe metal or other substance on the lbed and passing up into the furnace through ofthe furnace. The flame, after passing through the furnace, is drawn down to heat the regen! rators F F, and thence passes to the chimney- Having thus described my invention, I claim and desire to secure by Letters Patent of the.V

ps of increasing width, separated from the air-passages by con verging partition-walls, as andfor the purposes described'.

3. `A regenerative furnace in which the airflues are separated from thegas-ues by partition-walls providedwith deiiectors ilxed over the gas-passages, as and for thepurposes described.

4. A regenerative furnace provided with gaspassages of increasing width and slabs N, as and for the purposes described.

5. A regenerative 4furnace provided with horizontal gas-passages of increasing width and vertical air-passages of increasing width, as and for the purposes described.

6. A regenerative furnace provided with vertical air-ports rising nearly to the root' of the furnace, and side walls for the fines extending forward in, a convergent manner until they meet, in order that the air may issue into the furnace in diverse directions above the combustible gases, substantialh as described. 7. The combination, with a regenerative furnace and its liues,of a' supplemental chamber connected therewith provided with chimneys, as and furthe purposes described.

C. WILLIAM SIEMENS.

4 Witnesses Onis. ROCHE,

Renner JOHN Gaow.

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