US3377058A - Cupola furnace installations having a safety bypass - Google Patents

Cupola furnace installations having a safety bypass Download PDF

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Publication number
US3377058A
US3377058A US488901A US48890165A US3377058A US 3377058 A US3377058 A US 3377058A US 488901 A US488901 A US 488901A US 48890165 A US48890165 A US 48890165A US 3377058 A US3377058 A US 3377058A
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US
United States
Prior art keywords
downcomer
pollutants
furnace
air washer
cupola furnace
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US488901A
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English (en)
Inventor
Panzica Nicholas John
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ajem Laboratories Inc
Original Assignee
Ajem Laboratories Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ajem Laboratories Inc filed Critical Ajem Laboratories Inc
Priority to US488901A priority Critical patent/US3377058A/en
Priority to DE19661508554 priority patent/DE1508554A1/de
Priority to GB41786/66A priority patent/GB1160119A/en
Priority to CH1349766A priority patent/CH454364A/de
Priority to BE687200D priority patent/BE687200A/xx
Application granted granted Critical
Publication of US3377058A publication Critical patent/US3377058A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • F27B1/00—Shaft or like vertical or substantially vertical furnaces
    • F27B1/10—Details, accessories, or equipment peculiar to furnaces of these types
    • F27B1/18—Arrangements of dust collectors
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B7/00—Blast furnaces
    • C21B7/002—Evacuating and treating of exhaust gases

Definitions

  • a safety bypass for air pollution control equipment for cupola furnaces including a fan between the downcomer from the cupola furnace and the air washer, which fan is operative to exhaust the quenched, cooled, partially scrubbed fumes from the downcomer directly to the atmosphere when the air washer is inoperative.
  • the present invention relates, in general, to cupola furnace installations and more particularly to such an installation having a bypass which permits continuous and uninterrupted operation of the cupola furnace.
  • a cupola furnace In operation, a cupola furnace emits a wide variety of pollutants such as solid particulate matter, hot gases, toxic and deadly fumes, and incendiary particles to the surrounding environment when the cupola cap is open.
  • pollutants such as solid particulate matter, hot gases, toxic and deadly fumes, and incendiary particles to the surrounding environment when the cupola cap is open.
  • the cupola cap is opened to prevent the buildupof gases in the furnace and backfires at the charge door.
  • the burning particles emitted from the furnace can, when exhausted to the atmosphere, cause seriousinjuries to personnel in the area or may cause fires on structures on which these particles settle.
  • the other less dangerous pollutants while not creating a hazard, do produce an exceedingly objectionable nuisance.
  • the emissions passing through the water curtain are to a limited extent cooled and some of the solid particulate matter is captured by the water and collected in the drain trough.
  • the drain trough is arranged to be lower at one point so as to develop a flow of the liquid through a drain pipe to a reservoir.
  • wet caps in capturing and cooling the pollutants emitted from the cupola furnace.
  • One such shortcoming is that wet caps do not operate efiiciently in removing the solid particulate matter to the extent required by various Naional, State and Municipal codes.
  • a third shortcoming of a wet cap installation is that great quantities of liquid are required to flow over the distributor cone. It has been found that the results achieved in the removal and cooling of pollutants do not justify the effort involved in furnishing such great quantities of liquid.
  • a downcomer is a vertical structure of substantially the same height as the cupola furnace which is positioned alongside of the furnace. Just below the top of the cupola-furname is a cross-over passage through which the pollutants pass from the furnace to the downcomer.
  • the downcomer serves to capture a large portion of the pollutants and particularly the large particulate matter.
  • the lighter particulate matter is captured by the air washer which is connected to the downcomer outlet by a duct system.
  • the downcomer is provided with a number of different spray arrangements. These sprays are effective in cooling the hot gases emitted from the furnace and quenching flames and incendiary particles. It is important to cool the hot gases in order to bring the temperature of the gases to the maximum allowable for entry into the particular air washer.
  • a cupola furnace installation constructed in accordance with the present invention and described hereinafter includes a cupola furnace and a downcomer communicating with the cupola furnace for receiving pollutants from the furnace and for capturing a portion of these pollutants. Also included in this installation are an air washer communicating with the downcomer for receiving and capturing that portion of the pollutants not captured by the downcomer and a fan adapted to be inserted between the downcomer and the air washer to exhaust the pollutants not captured by the downcomer when the air washer is inoperative.
  • the cupola furnace installation shown in the drawing includes a cupola furnace of standard construction and operation.
  • Cupola furnace 10 is disposed vertically in the usual manner and is charged through charging door 10a.
  • Downcomer 11 may also be of conventional construction and operation.
  • the downcomer 11 communicates with the cupola furnace 10 through a crossover 12 which extends from the top of the furnace 10 to the top of the downcomer 11.
  • the crossover 12 serves to pass the pollutants from the cupola furnace to the downcomer.
  • the downcomer 11 serves to capture a portion of the pollutants emitted from the furnace 10. This is achieved by some of the pollutants freely falling into the conical portion 13 at the bottom of the downcomer and others being captured by the sprays within the downcomer. Since the downcomer 11 and the spray apparatus within the downcomer may be of conventional construction the details of the internal structure have not been shown.
  • the freely falling pollutants and the pollutant laden spray droplets are flushed out of the conical portion 13 through a pipe 14 to a tank 15.
  • Tank 15 may be a sedimenting tank or a recirculation tank where water is held for reuse in the spray systems in the downcomer.
  • the spray systems receive the required quantities of Water by means of a pair of pumps 18 and 19 which pump clean water from the tank 15 through a pair of valves 16 and 17 to the spray systems.
  • the downcomer 11 is effective in removing a large portion of the pollutants and, in particular, the larger particulate matter. Besides removing a portion of the pollutants, the downcomer 11 cools the hot gases emitted from the furnace. The resulting reduction in temperature of these gases permits passing these gases to an air washer for capturing that portion of the pollutants not captured by the downcomer.
  • a duct 20 communicates with the downcomer 11 at the lower end of the downcomer.
  • the duct 20 leads to an air washer 21 of conventional construction and operation.
  • a duct 22 leads from the air washer to a moisture eliminator section 23.
  • a fan 24 serves to develop the proper draft for drawing the pollutants from the cupola furnace 10 through the cross-over 12 into the downcomer 11 and out through the duct 20 to the air washer 21 and the moisture eliminator section 23.
  • the air washer 21 re ceives that portion of the pollutants not captured by the downcomer 11 and operates in the usual manner in cap turing these pollutants so that cleaned air is exhausted through a stack 25 to the atmosphere. Since the downcomer 11 is effective in capturing the larger particulate matter, the air washer is left with a lighter load.
  • This diversion of the pollutants from the downcomer 11 is achieved by means of a damper 28 which may occupy the two positions shown dotted in the duct 20.
  • the damper 28 is so positioned as to form a portion of the wall of the duct 20 and to close off the auxiliary fan 26 from the duct 20 causing the pollutants to follow their normal path to the air washer.
  • the damper 28 occupies a second position in which it extends across the duct 20 so that the air washer is closed off and the pollutants are directed to the auxiliary fan 26.
  • the damper 28 is moved back to the first position so that the apparatus may resume functioning in the usual manner.
  • the damper 28 may be moved manually, for example, by a handle when the air washer 21 becomes inoperative or resumes normal operation.
  • the damper may be moved automatically by an electro-mechanical drive responding to one or more tie tectors which sense a failure in the air washer or excessively high gas temperature.
  • an installation according to the present invention emits gases at far lower temperatures and prevents fiames and incendiary particles from leaving the exhaust stacks both while the air washer is operative and inoperative.
  • a furnace installation comprising:
  • a downcomer communicating with said furnace for quenching flames and incendiary particles, cooling an air washer communicating with said down-comer for receiving and capturing that portion of said pollutants not captured by said downcomer;
  • a cupola furnace installation comprising:
  • a downcomer communicating with said cupola furnace for receiving pollutants from said furnace and for quenching flames and incendiary particles, cooling gases, and capturing a portion of said pollutants;
  • an air washer for receiving and capturing that portion of said pollutants not captured by said downcomer
  • auxiliary fan in communication with said duct at a point between said downcomer and said air washer; and operative for drawing said pollutants from said cupola furnace into said downcomer and for exhausting said pollutants not captured by said downcomer when said air washer is inoperative.
  • a cupola furnace installation comprising:
  • a downcomer communicating with said cupola furnace for receiving pollutants from said furnace and for quenching flames and incendiary particles, cooling gases, and capturing a portion of said pollutants;
  • an air washer for receiving and capturing that portion of said pollutants not captured by said downcomer
  • an auxiliary fan in communication with said duct at a point between said downcomer and said air washer and operative when said air washer is inoperative for drawing said pollutants from said cupola furnace into said downcomer and for exhausting said pollutants not captured by said downcomer;
  • a cupola furnace installation comprising:
  • a downcomer for receiving pollutants from said furnace and for quenching flames and incendiary particles, cooling hot gases, and capturing a portion of said pollutants
  • an air washer communicating with said downcomer for receiving and capturing that portion of said pollutants not captured by said downcomer;
  • auxiliary fan inserted between said downcomer and said air washer and operative to exhaust the effluent from said downcomer, including said pollutants not captured by said downcomer, when said air washer is inoperative.
  • a cupola furnace installation comprising:
  • a downcomer for receiving pollutants from said furnace and for quenching flames and incendiary particles, cooling hot gases, and capturing a portion of said pollutants
  • an air washer for receiving and capturing that portion of said pollutants not captured by said downcomer
  • a cupola furnace installation comprising:
  • a downcomer for receiving pollutants from said furnace and for quenching flames and incendiary particles, cooling hot gases, and capturing a portion of said pollutants
  • an air washer for receiving and capturing that portion of said pollutants not captured by said downcomer
  • an auxiliary fan in communication with said duct at a point between said downcomer and said air washer and operative when said air washer is inoperative for drawing said pollutants from said cupola furnace into said downcomer and for exhausting said pollutants not captured by said downcomer;
  • a damper positioned in said duct for closing off said auxiliary fan from said duct when said air washer is operative and for closing off said air washer and directing said pollutants to said auxiliary fan when said air washer is inoperative.
  • a cupola furnace installation comprising:
  • a down-comer disposed vertically for receiving pollutants from said furnace and for quenching flames and incendiary particles, cooling hot gases, and capturing a portion of said pollutants;
  • an air washer for receiving and capturing that portion of said pollutants not captured by said downcomer
  • an auxiliary fan in communication with said duct at a point between said downcomer and said air washer and operative when said air washer is inoperative for drawing said pollutants from said cupola furnace into said downcomer and for exhausting said pollutants not captured by said downcomer;

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Treating Waste Gases (AREA)
  • Vertical, Hearth, Or Arc Furnaces (AREA)
  • Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
US488901A 1965-09-21 1965-09-21 Cupola furnace installations having a safety bypass Expired - Lifetime US3377058A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
US488901A US3377058A (en) 1965-09-21 1965-09-21 Cupola furnace installations having a safety bypass
DE19661508554 DE1508554A1 (de) 1965-09-21 1966-09-16 Kupol-Ofen mit Staubfaengeranordnung
GB41786/66A GB1160119A (en) 1965-09-21 1966-09-19 Improvements in or relating to Cupola Furnace Installations
CH1349766A CH454364A (de) 1965-09-21 1966-09-20 Vorrichtung zur Abscheidung ausgestossener Verunreinigungen an einem Ofen
BE687200D BE687200A (cs) 1965-09-21 1966-09-21

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US488901A US3377058A (en) 1965-09-21 1965-09-21 Cupola furnace installations having a safety bypass

Publications (1)

Publication Number Publication Date
US3377058A true US3377058A (en) 1968-04-09

Family

ID=23941585

Family Applications (1)

Application Number Title Priority Date Filing Date
US488901A Expired - Lifetime US3377058A (en) 1965-09-21 1965-09-21 Cupola furnace installations having a safety bypass

Country Status (5)

Country Link
US (1) US3377058A (cs)
BE (1) BE687200A (cs)
CH (1) CH454364A (cs)
DE (1) DE1508554A1 (cs)
GB (1) GB1160119A (cs)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3482377A (en) * 1966-06-07 1969-12-09 Reactor Centrum Nederland Ventilation appliances for a processing chamber
US4187085A (en) * 1977-03-29 1980-02-05 Nippon Kokan Kabushiki Kaisha Treating facility for sintering waste gas

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR426463A (fr) * 1910-05-30 1911-07-07 Rudolph Boecking & Cie Erben Stumm-Halberg Und Rud Procédé pour le filtrage à sec des gaz de haut fourneau
US1171696A (en) * 1915-12-08 1916-02-15 Hermann A Brassert Method of and apparatus for recovering sludge.
US1333325A (en) * 1918-05-13 1920-03-09 Frank R Mcgee Apparatus for cleaning gases
US1497727A (en) * 1920-12-07 1924-06-17 Fed Phosphorus Co Process and apparatus for the production of phosphoric acid
US2058919A (en) * 1933-01-17 1936-10-27 B F Sturtevant Co Air conditioning apparatus
US2208443A (en) * 1938-04-06 1940-07-16 Carrier Corp Air conditioning method and apparatus
US2723842A (en) * 1951-03-15 1955-11-15 Morgan Construction Co Regenerative furnace apparatus having flue gas separators
US3173980A (en) * 1962-11-21 1965-03-16 Wheelabrator Corp Furnace dust and fume collection system

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR426463A (fr) * 1910-05-30 1911-07-07 Rudolph Boecking & Cie Erben Stumm-Halberg Und Rud Procédé pour le filtrage à sec des gaz de haut fourneau
US1171696A (en) * 1915-12-08 1916-02-15 Hermann A Brassert Method of and apparatus for recovering sludge.
US1333325A (en) * 1918-05-13 1920-03-09 Frank R Mcgee Apparatus for cleaning gases
US1497727A (en) * 1920-12-07 1924-06-17 Fed Phosphorus Co Process and apparatus for the production of phosphoric acid
US2058919A (en) * 1933-01-17 1936-10-27 B F Sturtevant Co Air conditioning apparatus
US2208443A (en) * 1938-04-06 1940-07-16 Carrier Corp Air conditioning method and apparatus
US2723842A (en) * 1951-03-15 1955-11-15 Morgan Construction Co Regenerative furnace apparatus having flue gas separators
US3173980A (en) * 1962-11-21 1965-03-16 Wheelabrator Corp Furnace dust and fume collection system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3482377A (en) * 1966-06-07 1969-12-09 Reactor Centrum Nederland Ventilation appliances for a processing chamber
US4187085A (en) * 1977-03-29 1980-02-05 Nippon Kokan Kabushiki Kaisha Treating facility for sintering waste gas

Also Published As

Publication number Publication date
BE687200A (cs) 1967-03-21
CH454364A (de) 1968-04-15
GB1160119A (en) 1969-07-30
DE1508554A1 (de) 1969-10-30

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