US846506A - Continuous heating-furnace. - Google Patents

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Classifications

• • C—CHEMISTRY; METALLURGY
  • C03—GLASS; MINERAL OR SLAG WOOL
  • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
  • C03B5/00—Melting in furnaces; Furnaces so far as specially adapted for glass manufacture
  • C03B5/06—Melting in furnaces; Furnaces so far as specially adapted for glass manufacture in pot furnaces
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F27—FURNACES; KILNS; OVENS; RETORTS
  • F27B—FURNACES, KILNS, OVENS OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
  • F27B7/00—Rotary-drum furnaces, i.e. horizontal or slightly inclined

Definitions

• Figure 1 is a longitudinal vertical section Showing one form of our improved furnace.
• Fig. 2 is a horizontal section of the same, partly broken away.
• Fig. 3 1s a cross-section on the line Ill III of Fig. 1 looklng toward the left; and
• Fig. 4 1s a view similar to F 1g. 1, showing a modified form.
• Our invention relates to, the class of con tinuous heating-furnaces where a row of metal billets or blooms is pushed through a long furnace of tunnel form.
• the object of'the invention is to provide a simple and efficient construction in which theflame and gases may be conveniently distributed and the exit'-ports therefore not closed at any time by the entering billets or metal pieces.
• It is further designed to provide for a simple and efficient feed-out arrangement, to thoroughly mix the air and gas, to reduce the number of valves, and provide for heating the air where desired.
• 2 represents the hearth portion
• 3 the longitudinal piers, of a continuous heating-furnace 4.
• the longitudinal piers extend from the transverse outlet-flue 5 to the hearth and are preferably out through transversely at several points to allow the flame and gases to circulate more easily .and thoroughly in theiheating-chamher.
• the piers 3, between the cross-arch 6 and the port 5, are preferably out through to or nearly to the line of the furnace-floor, while the piers 3", which extend continuously to the hearth, areonly partially cut through, therecesses extending only a fraction of their depth.
• the roof of the, furnace has at an intermediate point a vertical cross-arch 6, the portion of the roof between said arch and the coinbustion-chamber being higher than the portion between the arch and the billetreceiving end of the furnace.
• the cross-arch is important because it provides a high space at the combustion-chamber, is strong and durable, and by suddenly reducing the space for passage of the gases it affords a more e'llicient heating action for the billets.
• the furnace-bottom between the piers with opposite inclines 7 and 8, as shown in Fig. 1, these inclines extending longitudinally of the furnace-chamber. Between the inner lower portions of these inclines the floor is preferably provided with holes 9, which lead downward completely through the furnace-bottom and into'the open space 10 below the bottom.
• the furnace-bottom may be supported upon the transverse I- beams 10, as shown, 11 being the tie-rods connecting the buckstaves 12 on opposite sides of the furnace.
• the space below the furnace-bottom is open at the sides throughout the distance from the flue 5 to the port 13, through which the billets drop.
• the holes 9 may be normally closed by suitable, 'doors.
• the Water-cooled pipes 15 extend along the longitudinal ,piers, the billets or metal pieces sliding over these bars. At their inner ends the bars are extendeddownwardly through the hearth, as Shown at 16, their parts below the furnace-bottom being led out laterally for suitable water connections.
• the hearth may be formed of any desirable material, and between itand tlie fuel-ports is the port or slot 13, through which the billets drop.
• This port is preferably arranged as shown with an angular portion which shifts the direction of the drop of the billets, the lower inclined part 17 being preferably lined with metal plates 17 and provided with a loose hanging door- 18, which may close the opening as it hangs in vertical position and is pushed back by the dropping piece.
• This inclined portion is above a transverse rest or support 19, which is merelya platform extending below the feed-out opening.
• this platform lies a forked pusher 20, which is connected to'a hydraulic cylinder 21, the billet or piece dropping between the legs of the fork. After the billet has thus dropped the forked pusher is moved endwise and the billet pushed out upon a suitable conveyer at one side of the furnace. 7
• this port 5 across the furnace, preferably widen it at the top, and extend it endwise to form the offset portions at opposite ends. These portions 23 extend into the side walls and form extensions of the port which leads down into the double-surface regenerator- 24.
• the regenerator 24 may be of the or .dinary double-surface type, the products flowing to the left in Fig.
• the furnace is operated intthe usual manner, the line of billets lying on the water cooled ,bars and being pushed in, through port 22.
• the billets drop from the feed-out opening onto the support below the furnace-bottom and are pushed endwi se by the forked pusher and drop on a suitable eonveyer,
• Fig. 4 we showa form similar to'that'of the first figures, similar parts being designated by similar numerals,- except that no regenerator is employed and the heat Is supplied from a coal-fired furnace 35.
• the con struction is otherwise similar to the first form.
• a continuous heating-furnace having a hearth at one end and an intake at the other end, spaced piers extending longitudinally between the intake and heartlnthe floor of the furnace between the piers being provided with scale-pockets having discharge-openings leading downwardly through the bottoms of the pockets, the roof of the furnace having openings disposed to. give access therethrough to the respective pockets for forcing scale through the discharge-openings substantially as described.
• a continuous furnace having a combustion-chamber at one end and an intake at the other end, the roof portion adjacent the combustion-chamber being elevated above the front roof portion, a cross-arch closing the space between the two roof portions, the
• the floor of the furnace having a scale-pocket beneath the elevated roof portion and provided with a discharge-opening, the cross-arch having an opening disposed to give access therethrough to the scale-pocket for forcing scale through the-discharge-opening substantially as described.
• a continuous heating-furnace having a hearth at one end and an intake at the other end, the roof portion of the furnace over the hearth being elevated above the front roof portion, across-arch closing the space between the two roof portions, longitudinal piers supported upon the floor of the furnace and leading to the hearth, scalepockets in "the furnace-floor between'the piers and beneath the elevated roof portion, said pockets having discharge openings leading downwardly through their 'bottoms, the cross-arch having-openings disposed to give access therethrougli. to the respective pockets for forcing scale through the discharge-openings substantially as described.
• a continuous heating-furnace having a feed-out opening through its floor, a billetsupport belowthe opening, and a reciprocating pusher workingacross said support; substantially as described.
• a continuous heating-furnace having a feed-out opening through itsfloor and inclinedto the vertical, said opening leading downwardly'toward the intake of the furnace, and a vertically-disposedswinging.
• a continuous heating-furnace having a feed-out, opening leading downwardly through its floor, a stationary billet-support located below the opening in position to receivethe billets when they pass through said opening, and means working across the top of the support to move the billet along said support substantially as described.
• a continuous heating-furnace having a feedout opening leading downwardly through its floor, a billet-support below the -mounted within and closing the feed-out opening, a billet-support located below the opening in position to receive billets discharging therethrough, and means worklng across the t'ogljf the support to move billets thereacross su stantially as described.
• a continuous heating-furnace having an intake extending the full width of the furnace, an upright outletflue at the intake end of the furnace intersecting the intake-passage and extending at opposite sides thereof for a vertical distance above the bottom of the passage exceeding the thickness of a billet substantially as described.
• a continuous heating-furnace having an intake extending the full width of the furnace, an outlet-flue at the intake end of the furnace intersecting the bottom of the intakepassage and extending at opposite sides thereof throughout the height of the intakepassage substantially as described.

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• Engineering & Computer Science (AREA)
• Chemical & Material Sciences (AREA)
• Materials Engineering (AREA)
• Organic Chemistry (AREA)
• Mechanical Engineering (AREA)
• General Engineering & Computer Science (AREA)
• Heat Treatments In General, Especially Conveying And Cooling (AREA)
• Tunnel Furnaces (AREA)

Description

Priority Applications (1)

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Publications (1)

Family

ID=2914970

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Cited By (1)

• 1904
  • 1904-07-25 US US21794104A patent/US846506A/en not_active Expired - Lifetime

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