US767840A

US767840A - Regenerative gas reheating-furnace.

Info

Publication number: US767840A
Application number: US16157203A
Authority: US
Inventors: Frederick Siemens
Original assignee: Individual
Current assignee: Individual
Priority date: 1903-06-15
Filing date: 1903-06-15
Publication date: 1904-08-16
Anticipated expiration: 1921-08-16

Description

No. 767,840. l PATBNTED AUG. 16, 1904, F. SIEMENS.`

RBGBNBRATIVE GAS RBHEATING FURNAGE.

APPLIOATIGN FILED JUNE l5, 1903.

N0 MODEL. I 5 SHEETS-SHEET l.

PATENTED AUG. 16, 1904.

E. SIEMENS.

-REGENERATIVE GAS REHEATING EURNACE.

APPLICATION FILED JUNE 15.1903.

5 SHEETS-SHEET 2.

N0 MODEL.

Maz 66666,

N0. 767,840. PATENTED AUG. 16, 1904.

F. SIEMENS. REGENERATIVE GAS REHEATING FURNAGE.

APBLIOATION FILED JUNE 15. 1903.

No MODEL. 5 SHEETS-SHBET s.

HH DDHH 2.3L; way

No. 767,840. PATENTED AUG. 16, 1904, F. SIEMENS.

REGENERATIVE GAS REHEATING FURNACE. l

APPLICATION FILED JUNE 15, 1903.

NO MODEL. 5 SHEETS-SHEET 4.

y WA i No. 767,840. PATENTED AUG. 16, 1904. E. SIEMENS. REGENERATIVE GAS REHEATING EURNACE.

APPLICATION FILED .TUNE 15, 1903.

N0 MODEL. 5 SHEETS-SHEET 5.

Patented August 16, 1904.

PATENT OFFICE.

FREDERICK SIEMENS, OF DRESDEN, GERMANY.

REGENERATIVE GAS REHEATlNG-FURNACE.

SPECIFICATION forming part of Letters Patent No. 767,840, dated August 16, 1904,

Application filed June 15,1903x Serial No. 161,572. (No model.)

To (all whom, it may concern,.-

VBe it known that I, FREDERICK SIEMENS, engineer, a subject of the King of Saxony, residing at 4 Liebigstrasse, Dresden, in the Empire of Germany, have invented certain new and useful Improvements in Regenerative Gras Reheating-Furnaces, of which the following is a specification, for which I have applied for a patent in Great Britain, dated November 14, 1902, N0. 25,057.

For the purpose of reheatingingots, blooms, billets, and the like for rolling and hammering it has been proposed to employ regenerative gas-furnaces having one end of the hearth cold or comparatively cool and the other end hot orvat the desired finishing heat. In such furnaces as at present constructed, however, it is found that if one end of the bed is cold or comparatively cool the regenerators are not heated regularly or suficiently, with the result that the required temperature is not maintained at the finishing end of the furnacebed.

The present invention consists in improvements in the construction of regenerative gas reheating-furnaces by which in such furnaces the regenerators are heated regularly and sufficiently to maintain the required temperature at the finishing end, while the other end may always be comparatively cool or even cold, so that ingots, blooms, billets, and the like can be continuously charged at the cold end and worked along gradually to the hot end, becoming heated on the way, until at the eX- treme hot end they are drawn or pushed out at the desired heat for rolling or hammering.

In the accompanying drawings, Figures 1 and 2 are respectively a vertical longitudinal section and a sectional plan showing the arrangement of the hot-end part of the furnace and the means for heating it consisting of an independent complete regenerative gas-furnace. Fig. 3 is a sectional plan showing' the similar heating arrangements for the cooler part of the furnace-bed in front of the partition-wall. Fig. 4 is a diagrammatic sectional plan showing the general arrangement of a complete furnace-bed constructed according to this invention, and Fig'. 5 is a section on line 5 5 of Fig. 4. Figs. 6 and 7 are views similar to Figs. 4 and 5 of a modified construction 'of' furnace to suit two rows of ingots. Fig. 8 shows a modified construction of the screenwall. Fig. 9 is a part plan of amodified construction of the end furnace. Fig. IO is a vertical longitudinal section of a furnace similar.to Fig. 4. Figs. 11 and l2 are cross-sections on lines 11 l1 and 12 l2 of Fig. 10, and Figs. 13 and 14 are diagrammatic sectional views of a further modification.

Referring' to Figs. I and 2, A is the part of the furnace in rear of the partition-wall@ in which the ingots or billets are brought to their finishing heat and is in communication with the gas-producers B B through the fiues C C and with the regenerators D D through the fines E E. Valves are provided for the control of the air and gas admitted and of the waste gases leaving' the furnace according to well-known practice. The result obtained is a U or horseshoe flame across the end of the heating-furnace reversible in direction, as represented by the arrow. l

In Fig. 3 a complete independent regenerative gas-furnace is shown by which is obtained a similar U fiame in the part F of the heating-furnace in front of the partition-wall, but directed lengthwise of the furnace.

Although, as shown in Figs. 1 to 3, provision is made for heating the regenerators alternately and reversing the direction of the flame, it is to be understood that sometimes when a lower finishing heat isvsuflicient the direction of each fiame may be continuous, the regenerators then being heated, as usual, in a continuous manner.

According to the construction of furnace shown in Figs. 4, 5, 10, 11, and 12 the transverse partition-wall e has an opening on the level of the furnace-bed just sufficiently large to allow the passage of a single ingot. The cold ingots are entered at the mouth t of the forward part of the heating-furnace and are gradually advanced, for example, by some mechanical device, such as a., into and through the horseshoe flame p, extending' between the flues from CZ to c, being thereby gradually heated, thence through the passage in the wall e into the region of the fiamef, where it is brought to a finishing'heat and from IOO which it is ejected through the opening g by any suitable means.

Fig's. 6 and 7 show a double :furnace of similar construction. In this case the partition- Wall may alternatively be built as shown in transverse section, Fig. 8. In each of these cases also the hot part of the furnace may be heated by a double continuous flame, as shown in the part-sectional plan, Fig. 9.

As shown in Figs. l0, 11, and 12, the ingots preferably travel on water-cooled tubes on the bed of the cooler part of the furnace, which is also sloped to facilitate the transference of the ingots. 1t is to be understood that the bed of the furnace lshown in Figs. 6, 7, and 8 may also be provided with tubes and sloped.

Figs. 13 and 14 are respectively horizontal and vertical longitudinal sections of a furnace arranged for the heating-flames in the cooler part of the furnace to pass alternately from side /L to side and from side vl to side /L of the furnace.

Having thus described the nature of this invention and the best means I know of carrying'the same into practical effect, l claiml. A regenerative gas reheating-furnace having primary and secondary chambers in communication with each other for the passage of billets, blooms or the like from the primary to the secondary chamber, means whereby a gas-flame is directed across one of said chambers above the bed thereof and bctween the ends of said bed, said flame being of a gradually-increasing temperature from one end of said bed to the other, and means for heating the other furnace-chamber.

2. A furnace havingl primary and secondary chambers in communication with each other for the passage of billets, blooms or the like from one to the other, means whereby a substantially U -shaped gas-flame is directed across one of the chambers above and between the ends of the bed thereof, said flame being of gradually-increasing temperature from one end of the bed to the other end, and means for heating the other furnace-chamber.

3. A furnace having a heating-chamber, and means whereby a substantially U-shaped gas-flame is directed across said chamber above its bed and between the ends of the latter, said flame being of gradually-increasing temperature from the charging end to the finishing end of said chamber.

.In witness whereof I have hereunto set my hand in presence of two subscribing witnesses.

FREDERICK siEMENs.

Titnessesz FRANZ RICHARD HERTEL, VERNEE F. SIEMENS.