US3824935A - Drying and incinerating furnaces - Google Patents

Drying and incinerating furnaces Download PDF

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Publication number
US3824935A
US3824935A US00359000A US35900073A US3824935A US 3824935 A US3824935 A US 3824935A US 00359000 A US00359000 A US 00359000A US 35900073 A US35900073 A US 35900073A US 3824935 A US3824935 A US 3824935A
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US
United States
Prior art keywords
chamber
rotary tube
outlet port
hearth
treated
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
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US00359000A
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English (en)
Inventor
Y Yamato
K Terada
B Nakamura
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.)
Yamato Sanko Manufacturing Co Ltd
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Yamato Sanko Manufacturing Co Ltd
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Publication date
Application filed by Yamato Sanko Manufacturing Co Ltd filed Critical Yamato Sanko Manufacturing Co Ltd
Application granted granted Critical
Publication of US3824935A publication Critical patent/US3824935A/en
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Expired - Lifetime legal-status Critical Current

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    • 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
    • F23G5/24—Incineration of waste; Incinerator constructions; Details, accessories or control therefor having a vertical, substantially cylindrical, combustion chamber
    • F23G5/28—Incineration of waste; Incinerator constructions; Details, accessories or control therefor having a vertical, substantially cylindrical, combustion chamber having raking arms

Definitions

  • ABSTRACT A drying and incinerating furnace containing means for effecting desiccation and incineration, in a single process, of a muddy material such as an activated sludge wherein said method is treated from the inlet side or the peripheral portion on the hearth to the outlet side or the central'part of the hearth.
  • Air-blowing nozzles and raking paddles are provided on rotary pipes for vortically blowing and transporting the material in the furnace.
  • the present invention relates to a drying and incinerating apparatus which can be used for the treatment of waste products. More particularly, the present invention is directed to a novel and improved apparatus having treating means for drying and incinerating, in a single process, muddy materials, for example an activated sludge, which, in the past, were not treatable using conventional furnaces.
  • a double-process treatment has been tried, in which the muddy material is first treated in a dryer and then retreated in an incinerator, said treatment, requiring a dryer, an incinerator, and conveying means therebetween. This is undesirable because the cost of the equipment is very high and the material handling is complicated.
  • Another object of the present invention is to provide an improved apparatus, in which a muddy material, especially an activated sludge, can be dried and incinerated in a single process.
  • a further object of the invention is to provide an improved apparatus, in which the overall operation is substantially simplified.
  • Still another object of the present invention is to provide an improved apparatus which neither discharges incompletely treated materials nor exhausts injurious gases to the atmosphere.
  • a still further object of the present invention is to provide an improved apparatus which possesses a high heatefficiency.
  • An even further object of the present invention is to provide an improved apparatus which is endurable over a long period of time.
  • An even still further object of the present invention is to provide an improved apparatus that contains a treating means for effecting desicration, incineration, and vortical transportation of the material being handled from the inlet to the outlet of the apparatus.
  • the furnace comprises a housing, having a vertical hollow-cylindrical wall and a circular hearth, the centers of said wall and hearth being aligned with each other.
  • An inlet port is provided in the wall for introducing the material to be treated on the peripheral portion of the hearth and the outlet port is located in the center of the hearth for removing the treated material from the housing.
  • a device for treating the material is mounted in the housing and comprises a rotary tube vertically inserted through the outlet port from the underside of the hearth into the housing.
  • An air supply system communicates with the bottom of the rotary tube, and a drive system is associated with the rotary tube for rotating said tube.
  • the rotary tube is rotatably supported by the housing.
  • a plurality of nozzles and blades are provided on the underside of each branch pipe.
  • a burner is provided in the wall and a gas exhauster is mounted on the top of the housing.
  • a plurality of radial branch pipes are secured to and communicated with the top of the rotary tube and are rotatable therewith.
  • the nozzle is disposed with a predetermined angle about the axis of the branch pipe from the vertical plane toward the rotary direction of the branch pipe, so as to blow the material in the direction of rotation of the branch pipe.
  • the blade is secured to the branch pipe in a manner that its flat face is inclined with a preselected angle to thedirection of rotation of the branch pipe with respect to the vertical plane passing through the axis of the branch pipe. As the rotary tubes rotate, the blades rake and transport the material centripetally and vortically to the center of the hearth or the outlet port.
  • FIG. 1 is an elevation, partially in section, of an embodiment of the furnace of the present invention
  • FIG. 2 is a section taken along the line II-II of FIG. 1', and
  • FIG. 3 is a cross-sectional view illustrating, on a relatively enlarged scale, the radial branch pipe provided with nozzles and blades.
  • the furnace illustrated therein comprises a housing 1 having a vertical, hollow, cylindrical wall la and a circular hearth 1b, the centers of said cylindrical wall and circular hearth being aligned with each other.
  • the housing 1 has an outlet port 2 provided in the center of hearth 1b for discharging the treated material from the housing.
  • a rotary tube 3 has its lower portion rotatably supported by housing 1 and its upper portion vertically inserted from the underside of hearth lb into the inside of the housing through and concentrically with outlet port 2.
  • a plurality of branch pipes 4 have their bases fixed to and internally communicated with the top of rotary tube 3, each branch pipe extending radially from the rotary tube.
  • the rotary tube 3 is operatively connected with a geared motor 20 through a bevel gear transmission 10, whereby the rotary tube as well as the branch pipes are rotated in the direction shown by the arrows of FIG. 2.
  • the rotary tube 3 has its bottom end internally commu- 3 nicated with a blast tube 11 connected to the delivery side of a fan 12.
  • a plurality of nozzles 5 and blades 6 are provided on the'underside of each branch pipe 4.
  • the nozzles 5 are preferably disposed with their axis inclined with respect to the vertical plane containing the axis of the branch pipe, as seen in FIG. 3, in order to blow thematerial in the direction of rotation of the branch pipe. As shown in FIGS.
  • blade 6 is secured to the branch pipe 4 with its flat face inclined relative to the vertical plane containing the axis of the branch pipe, so that, while the branch pipe rotates, the blades rake the material on the hearth in a centripetally vortical way, thereby gathering the material in the central portion of. the hearth.
  • An inlet device 7 including a material supply tube 22 and a screw conveyor 23 mounted therein is disposed in the cylindrical wall la in a manner such that the material to be treated is deposited on the peripheral portion of the hearth 1b.
  • An exhaust means 9 is mounted on the top of housing 1 for the exhaust of gas from the housing.
  • a gas or oil burner 8 is provided in the Wall 1a.
  • the axis of the burner is preferably arranged to direct its products tangentially to an imaginary circle spaced a predetermined distance from the center of the cylindrical wall and said burner is also disposed in a position slanted to the surface of the hearth.
  • a water bath 13 is disposed beneath outlet port 2 for chilling the treated material or ash that drops through the outlet.
  • a water pipe l4 is connected with the bath for supplying the waterthereto and the ash is removed through a drain pipe 15 together withthe water.
  • the water system for treating the ash can be substituted by a chute system, in which a chute is placed beneath the outlet port to guide the ash into a take-up device.
  • the burner 8 is fired to flame and heat the inside of the housing lupto a desired temperature for treatment.
  • the fan 12 is started to cause air to blow out through .nozzles 5 against the surface of hearth lb, while the rotary tube 3 is rotated.
  • the material to bev treated is deposited on hearth 1b through material supply tube 22 by screw conveyor 23.
  • the material located on the peripheral part of the hearth is gradually and centripetally and vortically moved toward the central part or the outlet port by blades 6, while it is heated and dried by the air-blowing through nozzles 5.
  • the blades 6 penetrate deeply into the material deposit which serves for quickly drying and insuring complete combustion of the material.
  • the material Until the material is dried to a critical moisture content, it still possesses a wet bulb temperature. But, after exceeding the critical moisture content, the material soon reaches its firing temperature and makes a violent complete combustion through the help of fresh airsupply through nozzles 5. Thus, when the material arrives in the central part of the hearth, it is completely converted into ash and drops through outlet port 2 into the bath therebeneath, where the ash is chilled and then removed from the apparatus through drain pipe 15. Some ash is rolled up by the rotational air-flowing in the housing. However, it is separated from the exhausting gas by centrifugal motion and returned into the material on the hearth along the wall.
  • Another advantageous effect of the furnace of the present invention is that it is very high in heatefficiency since the material is burned after being dried to the proper moisture content.
  • the nozzles and blades provided on the branch pipes can supply air and heatenergy deep into the material all over the surface of the hearth, so that a complete combustion following the rapid drying of the material is achieved. This results in neither discharging incompletely burned products nor exhausting injurious gases.
  • the housing as well as other components, for example, the rotary tube, the branch pipes, and the blades disposed in the high temperature environment are endurable for many years service, because the fan causes fresh air to pass through and about these elements thereby protecting them from heatdamage.
  • An apparatus for drying and incinerating materials which comprises a chamber containing the material to be treated, inlet means for supplying the material to be treated to the chamber, outlet means forremoving the treated material from the chamber, said outlet means including an outlet port centrally disposed in the bottom of said chamber, treating means provided in said chamber for blowing the material deposited on the bottom of said chamber and transporting it vortically toward said outlet port, said treating means comprising a rotary tube mounted for rotation and extending vertically through the outlet port, said rotary tube being provided with a plurality of radially extending branch pipes, said branch pipes containing a plurality of nozzles and blades provided on the underside thereof, airsupply means communicating with said rotary tube and drive means communicating with said rotary tube for rotating the same, burner means communicating with the chamber and gas exhaust means associated with said chamber for removing the gases of combustion therefrom.
  • branch pipes internally communicating with the top of the rotary tube inside the chamber, and the bottom of said rotary tube internally communicating with the airsupply means.
  • each nozzle has an axis directed toward the surface of said chamber bottom with a predetermined angle inclined toward the rotating direction of said branch pipe.
  • each blade extends nearly to the surface of said chamber bottom, said blade having a face inclined toward the rotating direction of said branch pipe with respect to the axis of said branch pipe for centripetally and vortical transporting the material.
  • said inlet means comprises a material-supply tube disposed in said cylindrical wall and screw conveyor means provided therein for depositing the material on the peripheral portion of said chamber bottom.
  • said outlet means comprises a water system including a bath for receiving the treated material dropped through said outlet port, a water supply pipe connected to said bath, and a discharge pipe for discharging the treated material mixed with water.
  • said outlet means comprises a chute system disposed under said outlet port for guiding the treated material to a predetermined location outside the chamber.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Drying Of Solid Materials (AREA)
  • Gasification And Melting Of Waste (AREA)
US00359000A 1972-05-10 1973-05-10 Drying and incinerating furnaces Expired - Lifetime US3824935A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP47046114A JPS498075A (US07534539-20090519-C00280.png) 1972-05-10 1972-05-10

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US3824935A true US3824935A (en) 1974-07-23

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US00359000A Expired - Lifetime US3824935A (en) 1972-05-10 1973-05-10 Drying and incinerating furnaces

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US (1) US3824935A (US07534539-20090519-C00280.png)
JP (1) JPS498075A (US07534539-20090519-C00280.png)
DE (1) DE2323675A1 (US07534539-20090519-C00280.png)

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3962978A (en) * 1974-02-27 1976-06-15 South African Coal, Oil And Gas Corporation Limited Handling of hot particulate materials, such as for example, hot agglomerated coal ash and coal ash clinker
FR2301772A1 (fr) * 1975-02-18 1976-09-17 Hamworthy Engineering Four d'incineration de dechets
US4508039A (en) * 1983-04-22 1985-04-02 Kabushiki Kaisha Okawara Seisakusho Method of and system for incinerating sludge
US5226927A (en) * 1991-02-13 1993-07-13 Southern California Edison Wood gasifier
US5515793A (en) * 1994-05-17 1996-05-14 Nessy Kogyo Kabushiki Kaisha Incineration furnace
US5799590A (en) * 1994-04-13 1998-09-01 Sunny Industry Company, Limited Air supply system for incinerator apparatus
US6425335B1 (en) * 2001-06-20 2002-07-30 Ying-Tsung Chen Miniature garbage incinerator
FR2850735A1 (fr) * 2003-01-31 2004-08-06 Michel Finet Incinerateur d'ordures menageres
US20100126491A1 (en) * 2008-11-25 2010-05-27 Harold Angus Swanson Burner for combustion of fuel in pellet or granular form
US20140144385A1 (en) * 2008-08-15 2014-05-29 Wayne/Scott Fetzer Company Biomass Fuel Furnance System And Related Methods
CN105318681A (zh) * 2014-07-04 2016-02-10 神华集团有限责任公司 干燥器或热解器
CN107687643A (zh) * 2017-08-31 2018-02-13 新乡市新垣防腐保温制品有限公司 一种环保垃圾焚烧炉
CN108180485A (zh) * 2017-12-06 2018-06-19 赣州清亦华科科技有限公司 一种稀土生产可燃性废物焚烧装置
CN109028152A (zh) * 2018-06-01 2018-12-18 南京师范大学镇江创新发展研究院 一种家用旋转式抗结渣生物质颗粒燃烧炉

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS565247Y2 (US07534539-20090519-C00280.png) * 1975-01-10 1981-02-04
JPS583035Y2 (ja) * 1978-11-02 1983-01-19 株式会社川田製作所 主として合成樹脂材料の乾燥装置
JPS63127070A (ja) * 1986-11-17 1988-05-30 富士バルブ株式会社 産業廃棄物用の乾燥炉
US5730072A (en) * 1995-10-17 1998-03-24 Advanced Envirotech Systems, Inc. Method and system for continuous rapid incineration of solid waste in an oxygen-rich environment

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2568657A (en) * 1947-12-15 1951-09-18 William F Pfau Furnace grate structure, including ash removal means
US3319587A (en) * 1964-03-31 1967-05-16 Dorr Oliver Inc Disposal of waste material by combustion in an inert fluidized bed
US3605656A (en) * 1968-06-08 1971-09-20 Calval Dev Ltd Furnaces
US3671167A (en) * 1970-06-12 1972-06-20 Iwatani & Co Incinerator for waste oil and the like
US3741136A (en) * 1971-09-17 1973-06-26 Torrax Syst Inc Tap system for molten materials

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2568657A (en) * 1947-12-15 1951-09-18 William F Pfau Furnace grate structure, including ash removal means
US3319587A (en) * 1964-03-31 1967-05-16 Dorr Oliver Inc Disposal of waste material by combustion in an inert fluidized bed
US3605656A (en) * 1968-06-08 1971-09-20 Calval Dev Ltd Furnaces
US3671167A (en) * 1970-06-12 1972-06-20 Iwatani & Co Incinerator for waste oil and the like
US3741136A (en) * 1971-09-17 1973-06-26 Torrax Syst Inc Tap system for molten materials

Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3962978A (en) * 1974-02-27 1976-06-15 South African Coal, Oil And Gas Corporation Limited Handling of hot particulate materials, such as for example, hot agglomerated coal ash and coal ash clinker
FR2301772A1 (fr) * 1975-02-18 1976-09-17 Hamworthy Engineering Four d'incineration de dechets
US4043280A (en) * 1975-02-18 1977-08-23 Hamworthy Engineering Limited Incinerator
US4508039A (en) * 1983-04-22 1985-04-02 Kabushiki Kaisha Okawara Seisakusho Method of and system for incinerating sludge
US5226927A (en) * 1991-02-13 1993-07-13 Southern California Edison Wood gasifier
US5799590A (en) * 1994-04-13 1998-09-01 Sunny Industry Company, Limited Air supply system for incinerator apparatus
US5515793A (en) * 1994-05-17 1996-05-14 Nessy Kogyo Kabushiki Kaisha Incineration furnace
US6425335B1 (en) * 2001-06-20 2002-07-30 Ying-Tsung Chen Miniature garbage incinerator
FR2850735A1 (fr) * 2003-01-31 2004-08-06 Michel Finet Incinerateur d'ordures menageres
US20140144385A1 (en) * 2008-08-15 2014-05-29 Wayne/Scott Fetzer Company Biomass Fuel Furnance System And Related Methods
US20100126491A1 (en) * 2008-11-25 2010-05-27 Harold Angus Swanson Burner for combustion of fuel in pellet or granular form
US8322331B2 (en) * 2008-11-25 2012-12-04 Harold Angus Swanson Burner for combustion of fuel in pellet or granular form
CN105318681A (zh) * 2014-07-04 2016-02-10 神华集团有限责任公司 干燥器或热解器
CN105318681B (zh) * 2014-07-04 2018-03-16 神华集团有限责任公司 干燥器或热解器
CN107687643A (zh) * 2017-08-31 2018-02-13 新乡市新垣防腐保温制品有限公司 一种环保垃圾焚烧炉
CN107687643B (zh) * 2017-08-31 2018-10-12 新乡市新垣防腐保温制品有限公司 一种环保垃圾焚烧炉
CN108180485A (zh) * 2017-12-06 2018-06-19 赣州清亦华科科技有限公司 一种稀土生产可燃性废物焚烧装置
CN108180485B (zh) * 2017-12-06 2019-11-26 玉环万建机械有限公司 一种稀土生产可燃性废物焚烧装置
CN109028152A (zh) * 2018-06-01 2018-12-18 南京师范大学镇江创新发展研究院 一种家用旋转式抗结渣生物质颗粒燃烧炉

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DE2323675A1 (de) 1973-11-29
JPS498075A (US07534539-20090519-C00280.png) 1974-01-24

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