US3396683A - Means for pre-heating air for introduction into incinerators - Google Patents

Means for pre-heating air for introduction into incinerators Download PDF

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Publication number
US3396683A
US3396683A US647758A US64775867A US3396683A US 3396683 A US3396683 A US 3396683A US 647758 A US647758 A US 647758A US 64775867 A US64775867 A US 64775867A US 3396683 A US3396683 A US 3396683A
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US
United States
Prior art keywords
incinerator
air
duct
combustion
inner liner
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
US647758A
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English (en)
Inventor
Lewis M Ford
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.)
STEELCRAFT CORP
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STEELCRAFT CORP
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Publication date
Application filed by STEELCRAFT CORP filed Critical STEELCRAFT CORP
Priority to US647758A priority Critical patent/US3396683A/en
Priority to BE709366D priority patent/BE709366A/xx
Application granted granted Critical
Publication of US3396683A publication Critical patent/US3396683A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G5/00—Incineration of waste; Incinerator constructions; Details, accessories or control therefor
    • F23G5/36—Incineration of waste; Incinerator constructions; Details, accessories or control therefor having a conical combustion chamber, e.g. "teepee" incinerators

Definitions

  • the present invention relates to the elimination of the problems in continuing the proper firing of incinerators and to the provision of substantially self-contained forced draft means for furnishing pre-heated air to assist in the combustion of the materials in the combustion chamber of the incinerator.
  • None of the known prior art provides for utilizing the heat of the incinerator for pre-heating the air of combustion.
  • the present invention is directed toward the furnishing of pre-heated air in connection with combustion to and through the grates of an incinerator and is primarily concerned with a system in which external atmospheric air is admitted between the outer skin and inner liner of an incinerator to effect dissipating of the external heat of the incinerator and thus the air absorbing heat from the internal heat of the incinerator, with a duct mounted within the incinerator to receive the full heat of the incinerator for the heating of the air contents thereof, the duct being connected to the space between the outer skin and inner liner of the incinerator so as to receive air pre-heated in that area and to withdraw the same into the duct for exposure to the full internal heat of the incinerator, the duct being connected to a blower fan and communicated with the interior of the incinerators so as to deliver the pre-heated air to the incinerator for facilitating the burning of the refuse therein.
  • the principal object of the present invention is to provide a system for delivering pre-heated air utilizing primarily pre-heated air of an incinerator structure together with exposure of that air in a container mounted within the incinerator heat area for further heating and delivery thence to the grate area of the device.
  • a further object of the invention is to provide such a device which includes an elongated duct mounted interiorly of the incinerator and exposed to the internal heat of the incinerator which communicates with the air preheated between the outer skin of the incinerator and the inner liner so as to receive withdrawal of such preheated air for further heating and which is communicated at its opposite end to a blower fan for delivery to the incinerator combustion chamber of the heated air.
  • a further object of the invention is to provide an incinerator in which the outer skin is spaced outwardly from the inner liner and the lower skirt of the outer skin is spaced upwardly from the lower edge of the inner liner so as to permit a peripheral introduction of atmospheric air into the space between the outer skin and the inner liner.
  • a further object of the invention provides an incinerator in which such an inner liner is provided with a plurality of spaced inlets communicating the atmospheric air into the interior of the combustion chamber.
  • FIG. 1 is a plan view of an incinerator having the present invention incorporated therein.
  • FIG. 2 is a vertical view partly in elevation, and partly in cross section, as taken on the line II-II of FIG. 1.
  • FIG. 3 is an enlarged fragmentary cross sectional view of the device of FIG. 1 as taken on the line III-III of FIG. 1.
  • FIG. 4 is an enlarged fragmentary cross-sectional view of the device of FIG. 1 as taken on the line IVIV of FIG. 1.
  • the present invention includes an elongated air duct 11, substantially rectangular in cross section provided with an upper housing 13 and a lower housing 15 interconnected as at the flanged portion 17 by bolts or similar fasteners to form the substantially unitary duct 11.
  • the duct 11 is disposed within the combustion chamber 19 of an incinerator 21 in spaced adjacency and substantial parallel alinement with the inner liner 23 of the incinerator, which liner is seated upon the floor mounting of the incinerator.
  • the upper housing 13 of duct 11 is provided with an intake pipe 25 attached at one of its ends to upper housing 13 adjacent the top thereof, and at its opposite end to the inner liner 23.
  • the intake pipe 25 opens into the duct 11 and through liner 23 and provides means of communication between the inner chamber 27 to the upper housing 13 and the air chamber 29 of the incinerator 21 formed by the inner liner 23 and the outer skin 31 of the incinerator 21.
  • the lower housing 15 of the air duct 11 is provided with an air discharge pipe 33 attached to and communicating at one of its ends with the lower housing 15 of duct 11 adjacent the bottom thereof and at its opposite end being attached to and communicating through the inner liner 23 to provide air communication between the inner chamber 35 of the lower housing 15 of the air duct 11 and a forced draft fan 36 positioned external the incinerator 21.
  • Pipe 33 preferably extends outwardly beneath the skirt of the outer skin of the incinerator.
  • the dome 37 is provided with cap means 41 rigidly aflixed thereto having an offset throat portion 43 in communication therewith to direct the smoke and other byproducts of combustion in the combustion chamber 19 of the incinerator 21 through the throat portion 43 into the smoke duct 45 and there- 'beyond to a scrubber 47 whereby the air pollutants and similar materials are combined with water to form a substantially sludgelike composition which may be transported to and deposited Within a suitable container therefor.
  • the outer skin 31 of the incinerator 21, substantially alined in parallelism with the inner liner 23 is provided with a plurality of peripherally spaced support members 49 attached to the lowermost inner portio of the outer skin 31 extending downwardly therefrom into subtsantially rigid attachment with the incinerator floor 51 to maintain the peripheral lower edge portion 53 thereof in spaced relation above the incinerator floor 51 to form a substantially circumferential air ingress means 55 permitting the external atmosphere to enter therethrough into the air chamber 29 of the incinerator 21, formed between outer skin 31 and inner liner 23 which are spaced apart.
  • Floor 51 of incinerator 21 is provided with grate means 57 located substantially centrally of the incinerator and open for the flow of air therethrough toward the refuse and material being burned in the incinerator.
  • grate means 57 located substantially centrally of the incinerator and open for the flow of air therethrough toward the refuse and material being burned in the incinerator.
  • an air pipe 53 which is communicated with and receives the discharge from blower fan 36 so as to provide delivery of the heated air withdrawn through duct 11 to the grate and thence into the interior of the incinerator for enhancing the burning action therein.
  • fan 36 is enabled to deliver the pre-heated air, comprising air first heated in the air chamber surrounding the incinerator and thence additionally heated in the duct 11, directly into the grate 57 so as to further forward the burning of the contents of the incinerator and to eliminate difliculties in combustion therein.
  • Fan 36 is driven by drive means 61 preferably from a suitable source of power (not shown) connected to the drive means 61.
  • a plurality of spaced radially alined hollow tubes 63 are substantially horizontally disposed with relation to the incinerator floor 51, rigidly aflixed to the inner liner 23 somewhat above the incinerator floor 51 and below the peripheral edge of outer skin 31, communicating through the inner liner 23 between the atmosphere external the incinerator 21 and the combustion chamber 19 within the incinerator 21 to allow a desired amount of air from the atmosphere to enter the combustion chamber 19 in order to support combustion therein.
  • the pre-heated air is ejected from the grates 57 and is delivered into the combustion chamber enhancing the combustion therein.
  • the ensuing heat of combustion of the material in the combustion chamber 19 is transmitted to the inner liner 23 therearound increasing the temperature thereof.
  • the substantially cooler air entering the air chamber 29 through the air ingress means 55 is warmed by the inner liner 23 and pursuant to this warming rises upwardly in the air chamber 29.
  • the forced draft fan 36 is energized, the warmer air moving upwardly through the chamber 29 is urged through the intake pipe 25 into the duct 11 to replace the air removed therefrom by the forced draft fan 36.
  • the heated air entering the inner chamber 27 of the upper housing 13 of the duct 11 is further urged downwardly into the chamber 35 of the lower housing of the duct 11, acquiring additional heat in its passage downwardly therethrough from duct 11 fully exposed to the internal heat of the incinerator.
  • the pre-heated air 4 in the chamber 35 of the lower housing 15 is urged by the forced draft fan 36 away from the duct 11 through the discharge pipe 33 and the forced draft fan 36 into and through the intake means 59 wherein it is injected into the grates 57 to provide a substantially pre-heated airflow for a more complete and effiicient firing of the material in the combustion chamber 19 of the incinerator 21.
  • the byproducts of the combustion within the combustion chamber 19 of the incinerator 21 rise upwardly therein into the cap 41 of the dome 37 and outwardly therefrom through the throat portion 43 into the smoke duct 45.
  • the smoke and particled matter combined therewith is drawn from the smoke duct 45 into the scrubber 47 where the combinaiton of smoke and particles is washed allowing the cleaned gaseous product to re-enter the atmosphere and the water laden particles to drop as by gravity to the bottom of the scrubber 47 and thence to a suitable container or sump.
  • said air conduit means comprise tubes projecting inwardly from said inner liner into the interior of said combustion chamher.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
US647758A 1967-06-21 1967-06-21 Means for pre-heating air for introduction into incinerators Expired - Lifetime US3396683A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
US647758A US3396683A (en) 1967-06-21 1967-06-21 Means for pre-heating air for introduction into incinerators
BE709366D BE709366A (US08063081-20111122-C00064.png) 1967-06-21 1968-01-15

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US647758A US3396683A (en) 1967-06-21 1967-06-21 Means for pre-heating air for introduction into incinerators

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US3396683A true US3396683A (en) 1968-08-13

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US (1) US3396683A (US08063081-20111122-C00064.png)
BE (1) BE709366A (US08063081-20111122-C00064.png)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3557722A (en) * 1968-01-03 1971-01-26 Erman Corp Incinerating method and apparatus
FR2660049A1 (fr) * 1990-03-23 1991-09-27 Lelong Dominique Dispositif pour collecter les fumees d'une chambre de combustion dans sa partie superieure pour les evacuer vers le bas.

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US72339A (en) * 1867-12-17 Improvement in base-burning stoves
US1496900A (en) * 1922-11-08 1924-06-10 Walter F Mitchell Wood-refuse incinerator
US2452843A (en) * 1943-02-17 1948-11-02 Spladis Soc Pour L Applic D In Combustion apparatus for solid combustibles in fragments
US2760451A (en) * 1952-11-21 1956-08-28 George V Thompson Incinerator
US2850991A (en) * 1955-08-08 1958-09-09 George V Thompson Incinerator with baffle
US3267890A (en) * 1963-04-19 1966-08-23 Little Inc A Municipal incinerator

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US72339A (en) * 1867-12-17 Improvement in base-burning stoves
US1496900A (en) * 1922-11-08 1924-06-10 Walter F Mitchell Wood-refuse incinerator
US2452843A (en) * 1943-02-17 1948-11-02 Spladis Soc Pour L Applic D In Combustion apparatus for solid combustibles in fragments
US2760451A (en) * 1952-11-21 1956-08-28 George V Thompson Incinerator
US2850991A (en) * 1955-08-08 1958-09-09 George V Thompson Incinerator with baffle
US3267890A (en) * 1963-04-19 1966-08-23 Little Inc A Municipal incinerator

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3557722A (en) * 1968-01-03 1971-01-26 Erman Corp Incinerating method and apparatus
FR2660049A1 (fr) * 1990-03-23 1991-09-27 Lelong Dominique Dispositif pour collecter les fumees d'une chambre de combustion dans sa partie superieure pour les evacuer vers le bas.

Also Published As

Publication number Publication date
BE709366A (US08063081-20111122-C00064.png) 1968-07-15

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