US2037149A - Reversible regenerative furnace - Google Patents

Reversible regenerative furnace Download PDF

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Publication number
US2037149A
US2037149A US754132A US75413234A US2037149A US 2037149 A US2037149 A US 2037149A US 754132 A US754132 A US 754132A US 75413234 A US75413234 A US 75413234A US 2037149 A US2037149 A US 2037149A
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gas
valve
air
pipe
regenerators
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US754132A
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English (en)
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Reiner Otto
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D17/00—Regenerative heat-exchange apparatus in which a stationary intermediate heat-transfer medium or body is contacted successively by each heat-exchange medium, e.g. using granular particles
    • F28D17/04—Distributing arrangements for the heat-exchange media
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
    • F23L15/00—Heating of air supplied for combustion
    • F23L15/02—Arrangements of regenerators
    • 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
    • F27B3/00—Hearth-type furnaces, e.g. of reverberatory type; Tank furnaces
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E20/00—Combustion technologies with mitigation potential
    • Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery

Definitions

  • the mixture is too rich, the supply of air. is inade-' quate for combustion, and a portion of the mixture, or even its major portion, is not fired and goes to waste.
  • shut-down valve in the main gas pipe has the additional drawback that, when the gas supply has been cut off by such valve, the valuable gas mixture which is still present in the chambers and passages of the furnace, goes to waste as often as the gas-reversing valve is operated, and this loss may be of the order of 4000 cubic feet.
  • valves by which the flows of the individual gases are controlled are reopened at the same time after the furnace has been reversed.
  • Fig. 1 is a sectional elevation of the first-mentioned furnace
  • Fig. 2 is a similar elevation of the other furnace
  • Figs. 3 to 5 are elevations, drawn upon a larger scale, showing three positions of the valves by which the flow of the less valuable gas is controlled. j
  • gas mixture is supplied to a central chamber C of the furnace through an inlet port l5 which is connected to a mixing chamber l5, and the mixture is distributed by a rotary gasreversing valve I.
  • Air is supplied through an air pipe A,, and distributed. by an air-reversing valve 2.
  • Both reversing. valves are of the twoway type, with a central partition I' and 2', respectively.
  • the casing of the gas-reversing valve I is connected to two gas-regenerator chambers 4 and I8, at opposite sides of chamber C, by pa s-' and to the burner 5 by passages 'I" and I1",
  • a chimney flue II connects the casings of valves I and 2.
  • Fig. 1 three as pipes 8, 9, and Ill open into the mixing chamber I5.
  • the pipes 8 and 9 each supply a valuable gas for instance, coke gas in the pipe 8, and producer gas in the pipe 9, and a less valuable gas, such as blast furnace gas, flows in pipe I0.
  • a valuable gas for instance, coke gas in the pipe 8, and producer gas in the pipe 9, and a less valuable gas, such as blast furnace gas, flows in pipe I0.
  • Each gas supply pipe 8, 9, and I9 is equipped with a valve and the valves are shown as butterfly valves I2, I3, and I4, respectively.
  • the valves I2 and I3 in the respective pipes 8 and,9 for the valuable gases are operated by a shaft 4
  • Gearing 42, 43, and 44 connects the shaft H to the thirdvalve, I4, in the pipe II) for the less valuable gas.
  • the mechanism for controlling the valves is so designed that the valves I2 and I3, for the valuable gases, are closed a short time before the furnace is reversed by valves I and 2 while the valve I4, for the blast furnace gas, remains open for the present.
  • valve I4 in the pipe III for the less valuable gas might also be equipped with an (electric or other) motor of its own. Under all conditions, the valve I4 must lag with respect to the other two valves. This is easy if I the valve I4 has a motor of its own but may also be effected in various ways if there is only one motor M for all three valves, as illustrated. Thus, a clockwork might be wound by the closing movement of valves I2 and I3 and, after a certain time, close the valve I4. Obviously.
  • the mechanism for operating the valve I4 must be so designed that the valves I2 and I3, when being opened, open the valve I4 at the same time, for which purpose a suitable gearing or system of links and levers may be directly connected to the means for controlling the valves I2 and I3.
  • valves I2 and I3 in the respective pipes 8 and 9 are provided as described and operated by a motor M as shown 'in Fig. 1, or by any other suitable means not shown.
  • the valve I4 is replaced by a pair of valves 20 and 2I, both shown as butterfly valves, in a valve casing I II which is inserted between the pipe I and the mixing chamber I5.
  • the valve 20 is mounted on a. shaft 22, and the valve 2
  • An arm 26, with a crank pin 21, is mounted to turn freely on the shaft 22 and is operated by an electric or other motor, not shown.
  • a dog 29 is keyed on the shaft 22 and its oscillating movement with the shaft is limited by an upper check 30, and a lower check 35. Both checks are adjustable.
  • is also keyed on the shaft 22 and equipped with a block 32 at .its free end, for engaging the arm 26.
  • crank pin 21 at the free end of the arm 26 is adapted to engage in a fork 28 on the shaft 23 of valve 2
  • the fork 28 oscillates between two checks 33 and 36.
  • FIG. 3 shows the position of the valves during the normal operation of the furnace.
  • the valve 2I is full open, and its fork 28 engages the lower check 33.
  • the .dog 29 on the shaft 22 of valve 20 engages an inclined face at the right of check 30, and the block 32 at the free end of arm 3I bears against the arm 26 from the right.
  • the valve 20 is inclined at an angle of about 45 degs. for throttling the flow of the blast furnace or other less valuable gas from pipe III.
  • valves I and 2 of the furnace When it is desired to reverse the valves I and 2 of the furnace, the two valves I2 and I3 are closed a short time before the valves I and 2 are valve 20 does not open fully when the dog 29 is on the check.
  • the blastfurnace gas now expels the residual mixture in the furnace and causes it to be consumed, as described.
  • the valves I and 2 are now reversed and, at the same time the arm 26 is turned further in the direction of arrow 34, until it is arrested by an inclined face at the left of check 30. This movement of the arm 26 causes the forli 28 to move as far as the check 36, and the valve 2
  • The-supply of blast furnacegas to the mixing chamber I5 is now out off.
  • valves. l2 and I3 in the pipes 8 and 9 are opened, and-at the same time thearm 26 is returned into theposition i lustrated in Fig. 3 against the arrow 34.
  • the return of the valves may beeffected by any suitable means. If the arm 26 is made heavy enough, it will return into its initial position, Fig. 3, under the action of its own wefght but obviously it might be equipped with a weight or spring (not shown) for returning it.
  • the fork 28 is released and returns to the lower check 33, also by gravity, moving the valve 2
  • a burner for supplying air to said air regenerators, an air-reversing valve for alternately connecting said air regenerators to said air-supplying means, pipes for supplying various gases to said mixing chamber, and means for controlling the flow of the gas in each pipe.
  • a burner in a regenerative furnace, a burner, gas regenerators and air regenerators connected to said burner, a mixing chamber, a gas-reversing valve for alternately connecting said mixing chamber to said gas regenerators, means for supplying air to said air regenerators, an air-reversing valve for alternately connecting said air regenerators to said air-supplying means, pipes for supplying various gases to said mixing chamber, and means for controlling the flow of the gas in each pipe in time with the operation of said reversing valves.
  • a burner in a regenerative furnace, a burner, gas regenerators and air regenerators connected to said burner, a mixing chamber, a gas-reversing valve for alternately connecting said mixing chamber to said gas regenerators, means for supplying air to'said air regenerators, an air-reversing valve for alternately connecting said air regenerators to said air-supplying means, pipes for supplying various gases to said mixing chamber, means for controlling the flow of the gas in each pipe, means for operating one of said controlling means to cut off the supply, and means lagging with respect to said first-mentioned means, for operating the other controlling means to cut off the supply.
  • a burner in a regenerative furnace, a burner, gas rcgenerators and air regenerators connected to said burner, a mixing chamber, a gas-reversing valve for alternateiy connecting said mixing chamber to said gas regenerators, means for supplying air to said regenerators, an air-reversing valve for alternately connecting said air regenerators to said air-supplying means, pipes for supplying various gases to said mixing chamber, means for controlling the flow of the gas in each pipe, meansfor operating one of said controlling means to cut off the supply, and means lagging with respect said first-mentioned means, for operating the other controlling means to cut off the supp'y, and means for causing both controlling means to reestablish the supply at the same time.
  • a burner, gas regenerators and air regenerators connected to said burner, a mixing chamber, a gas-reversing valve for alternately connecting said mixing chamber to said gas regenerators, means for supplying air to said air regenerators, an air-reversing valve for alternately connecting said air regenerators to said air-supplying means, a pipe for supplying a valuable gas to'said mixing chamber, another pipe for supplying a less valuable gas to said mixing chamber, means for controlling the flow of thegas in each pipe, means for operating the controlling means of the valuablegas pipe to cut off the supply of valuable gas, and means lagging with respect to said operating means for operating the controlling means of the other pipe to cutoff the supply of less valuable as.
  • a burner in a regenerative furnace, a burner, gas regenerators and air regenerators connected to said burner, a mixing chamber, a gas-reversing valve for alternately connecting said mixing chamber to said gas regenerators, means for supplying air to said air regenerators, an air-reversing valve for alternately connecting said air regenerators to said air-supplying means, a pipe for supplying a valuable gas to said mixing chamber, another pipe for supplying'a less valuable gas to said mixing chamber, means for controlling the flow of the gasin each pipe, means for operating the controlling means of the valuable-gas pipe to out off the supply of .valuable gas, means lagging with respect to said operating means for operating the controlling means of the other pipe to cut off the supply of less valuable gas, and means for causingboth controlling means to re-establish the supply at the same time.
  • a burner, gas regenerators and air regenerators connected to said burner, a mixing chamber, a gas-reversing valve for alternately connecting said mixing chamber to said gas regenerators, means for supplying air to said air regenerators, an air-reversing valve for alternately connecting said air regenerators to said air-supplying means, a pipe for supplying a valuable gas to said mixing chamber, another pipe for supplying a less valuable gas to said mixing chamber, means for controlling the flow of the gas in each pipe, means for operating the controlling means of the valuable-gas pipe to cut off the supply of valuable gas, means lagging with respect to said operating means for operating the controlling means of the other pipe to cut off the supply of less valuable gas, and means for throttling the supply of the less valuable gas while the supply of the valuable gas is on, and for laying the supply of the less valuable gas fully open when the valuable gas is off.
  • a burner in a regenerative furnace, a burner, gas regenerators and air regenerators connected to said burner, a mixing chamber, a gas-reversing valve for alternately connecting said mixing chamber to said gas regenerators, means for supplying air to said air regenerators, an air-reversing valve for alternately connecting said air regenerat rs to said air-supplying means, a pipe for supplying a valuable gas to said mixing chamber, another pipe for supplying a less valuable gas to said mixing chamber, a valve in each pipe, means for opening and closing the valve in the valuable-gas pipe, and means for controlling the valve in the pipe for, the less valuable gas so as to throttle the flow of the less valuable gas while the valve in the valuable-gas pipe is open, and to fully open the flow of the less valuable gas when the valve .in the valuable-gas pipe has been closed.
  • a burner gas regenerators and air regenerators connected to said burner, a mixing chamber, a gas-reversing valve for alternately connecting said mixing chamber to said gas regenerators, means for supplying air to said air regenerators,.
  • an air-reversing valve for alternately connecting said air regenerators to said air-supplying means, a pipe for supplying a valuable gas to said mixing chamber, another pipe for supplying a less valuable gas to said mixing chamber, a valve in said valuable-gas pipe,
  • throttling valve and a closing valve arranged one behind the other in the pipe for the less valuable gas, and means for holding said throttling valve in throttling position with respect to the flow of less valuable gas, for holding the closing valve in fully open position with respect to such flow while the valve in the valuable-gas pipe is open, for moving said throttling valve into fully open position when the valve in the valuable-gas pipe is closed, for moving said closing valve into closing position without moving said throttling valve from its fully open position, and for first returning the throttling valve into throttling position, and then returning the closing valve into fully open position, after the valve in the valuable-gas pipe has been re-opened.
  • a burner gas regenerators and air regenerators connected to said burner, a mixing chamber, a gas-reversing valve for alternately connecting said mixing chamber to said gas regenerators, means for supply n air to said air regenerators, an air-reversing valve for alternately connecting said air regenerators to said air-supplying means, a pipe for supplying a valuable gas to said mixing chamber, another pipe for supplying a less valuable gas to said mixing chamber, a valve in said valuable-gas pipe, means for opening and closing said valve, a throttling valve and a closing valve arranged one behind the other in the pipe for the less valuable gas, a shaft for each valve mounted to turn in the pipe for the less valuable gas, an arm mounted to turn freely on the shaft of said throttling valve, means tending to move said throttling valve into fully open position, one-way means operatively connected to said.
  • a burner gas regenerators and air regenerators connected to said burner, a mixing chamber, a gas-reversing valve for alternately connecting said mixing chamber to said gas regenerators, means for sup:- plying air to said air regenerators, an air-reversing valve for alternately connecting said air regenerators to said air-supplying means, a pipe for supplying a valuable gas to said mixing chamber, another pipe for supplying a less valuable gas to said mixing chamber, a valve in said valuable-gas pipe, means for opening and closing said valve, a throttling valve and a closing valve arranged one behind the other in the pipe for the less valuable gas, a shaft for each valve arranged to turn in the pipe for the less valuable gas, a weight connected to the shaft of said throttling valve for turning said shaft and moving said throttling valve into fully open position, an arm mounted to turn freely on the shaft of said throttling valve, a block operatively connected to the shaft of said throttling valve and adapted to bear against said
  • a burner in a regenerative furnace, a burner, gas regenerators and air regenerators connected to said burner, a mixing chamber, a gas-reversing valve for alternately connecting said mixing chamber to said gas regenerators, means for supplying air to said air regenerators, an air-reversing valve for alternately connecting said air regenerators to said air-supplying means, a pipe for supplying a valuable gas to said mixing chamber, another pipe for supplying a less valuable gas to said mixing chamber, a valve in said valuable-gas pipe, means for opening and closing said valve, a throttling valve and a closing valve arranged one behind the other in the pipe for the less valuable gas, a shaft for each valve mounted to turn in the pipe for the less valuable gas, a weight connected to the shaft of said throttling valve for turning said shaft and moving said throttling valve into fully open position from throttling position, a pair of) adjustable checks for holding said throttling valve in its two positions, an arm mounted to turn freely on the shaft of said throttling valve,
  • the method of operating regenerative furnaces comprising supplying to the burner of the furnace air, not less than one valuable heating gas, and not less than one less valuable gas,

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
US754132A 1934-11-25 1934-11-21 Reversible regenerative furnace Expired - Lifetime US2037149A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DER89302D DE622174C (de) 1934-11-25 1934-11-25 Umsteuereinrichtung fuer Regenerativofenanlagen

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US2037149A true US2037149A (en) 1936-04-14

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DE (1) DE622174C (fr)
FR (1) FR781715A (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2433075A (en) * 1942-06-19 1947-12-23 Int Harvester Co Method of firing in furnaces or soaking pits
US2512259A (en) * 1943-04-09 1950-06-20 Robert D Pike Furnace for the production of nitric oxide from air
US2789086A (en) * 1953-08-19 1957-04-16 Koppers Co Inc Decarbonizing of the rich gas nozzles of coking or other chamber ovens
US3122359A (en) * 1961-12-08 1964-02-25 James E Macdonald Stove for blast furnace operation

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2170584B (en) * 1985-02-04 1988-02-17 British Gas Plc Regenerative heating systems
US5431147A (en) * 1993-03-19 1995-07-11 Nippon Furnace Kogyo Kaisha, Ltd. Burner device of regenerative and alternate combustion type

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2433075A (en) * 1942-06-19 1947-12-23 Int Harvester Co Method of firing in furnaces or soaking pits
US2512259A (en) * 1943-04-09 1950-06-20 Robert D Pike Furnace for the production of nitric oxide from air
US2789086A (en) * 1953-08-19 1957-04-16 Koppers Co Inc Decarbonizing of the rich gas nozzles of coking or other chamber ovens
US3122359A (en) * 1961-12-08 1964-02-25 James E Macdonald Stove for blast furnace operation

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Publication number Publication date
FR781715A (fr) 1935-05-21
DE622174C (de) 1935-11-21

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