US1339190A - Method and apparatus for controlling furnace-temperature - Google Patents

Method and apparatus for controlling furnace-temperature Download PDF

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Publication number
US1339190A
US1339190A US285343A US28534319A US1339190A US 1339190 A US1339190 A US 1339190A US 285343 A US285343 A US 285343A US 28534319 A US28534319 A US 28534319A US 1339190 A US1339190 A US 1339190A
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United States
Prior art keywords
temperature
furnace
gases
gas
chamber
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Expired - Lifetime
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US285343A
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English (en)
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Fuller George Freeman
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Individual
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Individual
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Priority to US285343A priority Critical patent/US1339190A/en
Application granted granted Critical
Priority to FR514935A priority patent/FR514935A/fr
Publication of US1339190A publication Critical patent/US1339190A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J17/00—Forge furnaces
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D11/00—Process control or regulation for heat treatments

Definitions

  • my invention contemplates the provision of a supply of heated gases for the furnace, andy the further provision of a supply of preferably inert gas at a lower temperature, together with means for varying the admission of one or both of these gases to the furnace.
  • my improved method of temperature control consists in raising the furnace temperature by admitting heated gases thereto and in limiting the rise in vtemperature by cooling the Specification of Letters Patent.
  • heated gases in said furnace in any desired ratio by mixing a cooler inert gas therewith.
  • a cooler inert gas therewith.
  • steam under pressure forms a satisfactory cooling gas, but any gas which will not support combustion may be used.
  • the inert material may be admitted to the furnace in non-gaseous form,
  • Ato be immediately converted to an inert gas .
  • I have also indicated conventional oil or gas burners 15 in the chamber 12, and a plurality of'nozzles 16 extending through the side walls of the' furnace into the upper portion of the passage 13.
  • the nozzles 16 are connected by pipes 17 and 18 to a supply pipe 19, these pipes being provided with valves, as shown, through which the nozzles may be controlled separately or in groups.
  • the pipe 19 is connected to any suitable supply of inert gas under pressure, steam being more commonly use
  • the chambers 10 and 11 are separated by a perforated arch 2O through which the gases pass readily to the chamber 10, the flow of gases beinf clearly indicated by arrows in Fig. 1.
  • Vaalves 21 are provided for controlling the burners 15.
  • this is accomplished by blowing steam through the nozzles 16 into the mixing cham-
  • the steam thus admitted passes through-the upper end of the passage 13 and acts to some extent as an injector carrying with it the hot gases from the combustion chamber 12.
  • the temperature of these latter gases may be further reduced by temporarily shutting off the vburners 21, but this is not essential as satisfactory regulation can be secured by the admission of steam even if the burners continue fully active.
  • the temperature of the furnace may be determined at several different points by the use'of the usual fire-ends or pyrometers, and
  • the admission of steam to any particular part of the mixing chamber may be adjusted in accordance with the readings of these instruments.
  • results above .described may also be accomplished, although perhaps to yless advantage, by admitting a constant supply of low temperature gas through the nozzles 16 and by varying the supply of high temperature gas in any convenient manner as by opening and closing the burners 21 or by the use of a by-pass 22 and damper 23 (Figs. 1 and 4). Then the by-pass 22 is opened a part of the heated gases will pass directly to the flue 14 and a reduced amount will pass through the chambers 11 and 10. The proportion passing in each direction is determined by the position of the damper Q3.
  • Fig. 4 I have shown a furnace construction in which the mixing chamber 11 is omitted, the heated gases and the steam entering the heating chamber itself. I have also indicated in this figure certain of the nozzles projecting directly into the heating chamber rather than opening into the connecting passage as in Fig. 1. The method of operating these modified structures is exactly the same as in the preferred form.
  • the method of controlling furnace temperature which consists in raising the furnace temperature by the admission of heated gases, and in ⁇ thereafter maintaining-lf substantially constant furnace temperature by variably admitting cooler inert with talways necessary that tie inert materiaitheheated nace to raise the temperature of said chamber, and in limiting the temperature rise of said chamber by thereafter admitting -additional gas at lower temperature to said chamber.
  • the method of controlling furnace temperature which consists in supplying a substantially inert variable mixture of rela- ⁇ tively high and relatively low temperature gases to the heating chamber of said furnace.
  • the method of controlling furnace telnperature which consists in raising the temperature by the admission of heated gases to' the furnace, and in preventing undue rise in temperature without loss in gas volume by adding to the heated gases a gas of lower temperature.
  • the method of controlling furnace temperature which consists in constantly admitting heated gases thereto, and in intermittently adding gases of lower temperature to said heated gases.
  • the method of controlling furnace temperature which'consists in providing a supply of heated gases to the heating chamber of said. furnace, and in controlling the temperature of said gases by the admission of steam at a lower temperature to said heating chamber.
  • Furnace heating mechanism having, in combination, a heating chamber, a source of high temperature gas, a source of low temperature gas, and means to control the mixture of such gases in said chamber.
  • Furnace heating mechanism having,
  • a source of high temperature gas in combination, a source of high temperature gas, a source of low temperature gas, a mixing chamber, a heating chamber, a connection between said chambers, and means to vary the relative amount of low temperature gases admitted to said mixing chamber.
  • Furnace heating mechanism having, in combination, a combustion chamber, a mixing chamber, a heating chamber, a connection between said combustion and mixing chambers, a connection between said mixing and heating chambers, a source of steam supply, and means controlling ,the admission of steam to said mixing chamber.
  • the method of controlling furnace temperature which consists in supplying heated gases to raise the temperature, and in thereafter mixingv a variable quantity of inert gas of lowei1 temperature therewith to prevent further rise of temperature.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Furnace Details (AREA)
US285343A 1919-03-26 1919-03-26 Method and apparatus for controlling furnace-temperature Expired - Lifetime US1339190A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
US285343A US1339190A (en) 1919-03-26 1919-03-26 Method and apparatus for controlling furnace-temperature
FR514935A FR514935A (fr) 1919-03-26 1920-05-04 Procédé de réglage de la température d'un four

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US285343A US1339190A (en) 1919-03-26 1919-03-26 Method and apparatus for controlling furnace-temperature

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US1339190A true US1339190A (en) 1920-05-04

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US285343A Expired - Lifetime US1339190A (en) 1919-03-26 1919-03-26 Method and apparatus for controlling furnace-temperature

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US (1) US1339190A (fr)
FR (1) FR514935A (fr)

Cited By (7)

* 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
US2848207A (en) * 1955-09-15 1958-08-19 Metallurg Processes Co Apparatus for the scale free heating of metals
US3055652A (en) * 1960-05-12 1962-09-25 Bickley Furnaces Inc Burner assembly
US3099698A (en) * 1960-04-14 1963-07-30 Finanziaria Siderurgica Finsid Method to increase the efficiency of a furnace regenerator, particularly for open-hearth furnaces, and to decrease the piling temperature
US3297310A (en) * 1964-02-03 1967-01-10 Licencia Talalmanyokat Hot blast stoves for combusting quality fuels
US3617221A (en) * 1969-11-12 1971-11-02 Pan American Petroleum Corp Procedure for cooling down sulfur plant for inspection
US20070277912A1 (en) * 2006-05-31 2007-12-06 Josef Ruppel Arrangement for gas quenching of heat-treated parts and method for carrying out same

Cited By (8)

* 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
US2848207A (en) * 1955-09-15 1958-08-19 Metallurg Processes Co Apparatus for the scale free heating of metals
US3099698A (en) * 1960-04-14 1963-07-30 Finanziaria Siderurgica Finsid Method to increase the efficiency of a furnace regenerator, particularly for open-hearth furnaces, and to decrease the piling temperature
US3055652A (en) * 1960-05-12 1962-09-25 Bickley Furnaces Inc Burner assembly
US3297310A (en) * 1964-02-03 1967-01-10 Licencia Talalmanyokat Hot blast stoves for combusting quality fuels
US3617221A (en) * 1969-11-12 1971-11-02 Pan American Petroleum Corp Procedure for cooling down sulfur plant for inspection
US20070277912A1 (en) * 2006-05-31 2007-12-06 Josef Ruppel Arrangement for gas quenching of heat-treated parts and method for carrying out same
DE102006025737B4 (de) * 2006-05-31 2016-09-22 Ald Vacuum Technologies Gmbh Vorrichtung zur Gasabschreckung von wärmebehandelten Bauteilen und Verfahren zur Durchführung einer Gasabschreckung

Also Published As

Publication number Publication date
FR514935A (fr) 1921-03-22

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