[go: up one dir, main page]

WO2014198305A1 - Rotary bottom disc incinerator - Google Patents

Rotary bottom disc incinerator Download PDF

Info

Publication number
WO2014198305A1
WO2014198305A1 PCT/EP2013/062064 EP2013062064W WO2014198305A1 WO 2014198305 A1 WO2014198305 A1 WO 2014198305A1 EP 2013062064 W EP2013062064 W EP 2013062064W WO 2014198305 A1 WO2014198305 A1 WO 2014198305A1
Authority
WO
WIPO (PCT)
Prior art keywords
combustible matter
compartment
matter
retaining means
tubes
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.)
Ceased
Application number
PCT/EP2013/062064
Other languages
French (fr)
Inventor
Ronald David OPLINGER
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.)
FLSmidth AS
Original Assignee
FLSmidth AS
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 FLSmidth AS filed Critical FLSmidth AS
Priority to PCT/EP2013/062064 priority Critical patent/WO2014198305A1/en
Publication of WO2014198305A1 publication Critical patent/WO2014198305A1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

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
    • F23G5/24—Incineration of waste; Incinerator constructions; Details, accessories or control therefor having a vertical, substantially cylindrical, combustion chamber
    • F23G5/26—Incineration of waste; Incinerator constructions; Details, accessories or control therefor having a vertical, substantially cylindrical, combustion chamber having rotating bottom
    • 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
    • F23G5/002—Incineration of waste; Incinerator constructions; Details, accessories or control therefor characterised by their grates
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23H—GRATES; CLEANING OR RAKING GRATES
    • F23H3/00—Grates with hollow bars
    • F23H3/02—Grates with hollow bars internally cooled
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23H—GRATES; CLEANING OR RAKING GRATES
    • F23H7/00—Inclined or stepped grates
    • F23H7/02—Inclined or stepped grates with fixed bars
    • F23H7/04—Inclined or stepped grates with fixed bars in parallel disposition
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23H—GRATES; CLEANING OR RAKING GRATES
    • F23H2900/00—Special features of combustion grates
    • F23H2900/03021—Liquid cooled grates

Definitions

  • the present invention relates to an apparatus for incineration of combustible matter, which apparatus comprises a compartment for incineration of the combustible matter, an air duct for supplying hot air into the compartment, which compartment comprises an inlet in its upper part for introducing the combustible matter into the compartment at least partly by gravity, an outlet for extracting slag and any unburned matter and a rotary disc for supporting and transportation of the combustible matter, during the incineration, from the inlet to the outlet of the compartment.
  • Non-limiting examples of combustible matter include, besides from fossil fuel like coal, tyres, furniture, carpets, wood refuse, garden waste, kitchen waste, paper sludge, sewage sludge and bleaching earth.
  • compactable combustible matter has a tendency to remain stagnant on the disc, thus being not exposed to the required heat and/or oxygen to obtain complete incineration before it reaches the outlet of the compartment. It is the object of the present invention to provide an apparatus for incineration of combustible matter by which the aforementioned disadvantages are remedied or significantly reduced.
  • an apparatus of the kind mentioned in the introduction being characterized in that it comprises retaining means being placed below the inlet for combustible matter in a distance above the rotary disc in order to prevent introduced combustible matter above a given size from falling down onto the disc.
  • the apparatus which has a significant larger capacity because combustible matter with a larger size spread may be introduced and processed at the same time without compromising on the degree of burnout of especially those parts of the combustible matter having the largest particle sizes.
  • This is due to the fact that, as the combustible matter enters the compartment at its upper part, the smaller particles are allowed to pass by the retaining means and fall down to the rotary disc, whereas the larger particles, such as whole tires etc., are retained by the retaining means, thus a faster and more complete burnout of these larger particles are obtained. As the larger particles burn off the remaining pieces may fall down onto the disc when they are small enough to pass the retaining means. Further, the resulting bed of combustible matter on the rotary disc is less compact which allows for a more complete combustion of the smaller particles as well.
  • the apparatus according to the invention allows for more efficient use of the internal volume of the compartment.
  • the retaining means may in principle be constituted of any suitable means that act as a sieve in order to retain particles above a given size while allowing smaller particles to pass and fall down onto the disc.
  • the retaining means may comprise a kind of a grate or a number of wires, which are mounted inside the compartment below the inlet for combustible matter.
  • the retaining means comprise a number of tubes.
  • the retaining means are exposed to a dusty and a high temperature environment, hence it is preferred that they are made of a high temperature corrosion resistant alloy, such as HR-160 ® marketed by Haynes International, Inc. or the somewhat cheaper 253MA ® marketed by Avesta Welding.
  • HR-160 ® marketed by Haynes International, Inc.
  • 253MA ® marketed by Avesta Welding.
  • the retaining means comprise a number of tubes
  • said tubes may be mounted radially relative to the disc with a distance there between. In this way the distance between the tubes increases in the direction away from the center of the disc.
  • the tube may as an alternative be mounted parallel to each other with a certain distance there between. In this way the distance between the tubes is the same over the entire length of the tubes, which may be an advantage in some situations.
  • the retaining means may vertically be mounted in the same or different distances from the rotary disc, thus describing a horizontal or an inclined surface, respectively, or they may be mounted in a way that permits adjustment between a horizontal and an inclined surface.
  • the retaining means comprise a number of tubes
  • said tubes may be mounted in a descending arrangement, which enabling gradually movement of the larger combustible matter particles towards the rotary disc.
  • the tubes are mounted in a way that enables removal and/or replacement of these during operation of the apparatus. This may be realized by providing openings in a side wall of the compartment and corresponding mounting boxes placed radially inside the compartment close to the center thereof, where the cross section of both the openings and mounting boxes is adapted to a selected cross section of the tubes.
  • the retaining means may be subject to cooling by proper means, preferably arranged inside the retaining means.
  • the shown apparatus comprises a compartment 1 for incineration of the combustible matter and an air duct 2 for supplying hot air into the compartment 1 .
  • the compartment 1 comprises an inlet 3 in its upper part for introducing the combustible matter into the compartment, an outlet 4 for extracting slag and any unburned matter and a rotary disc 5 for supporting and transportation of the combustible matter, during the incineration, from the inlet 3 to the outlet 4 of the compartment, as indicated by the arrow 6.
  • the shown apparatus comprises six tubes 7, which are mounted below the inlet for 3 combustible matter.
  • the tubes 7 are placed radially relative to the disc 5 with an outwardly increasing distance there between, hence preventing introduced combustible matter above a given size from falling down onto the disc
  • the larger particles, which are retained by the tubes 7, will burn faster, thus ensuring a more complete burnout of these.
  • the bed on the rotary disc 5, consisting of smaller particles of combustible matter and residues, which have fallen down from the tubes 7, is less compact, which allows for a more complete combustion of the smaller particles as well.
  • an apparatus which has a significant larger capacity because combustible matter with a larger size spread may be introduced and processed at the same time without compromising on the degree of burnout of especially those parts of the combustible matter having the largest particle sizes.
  • the tubes 7 are placed in different distances above the disc 5, hence providing a descending surface, which enabling gradually movement of the larger combustible matter particles towards the rotary disc 5.
  • the apparatus comprises six openings 8 in a side wall of the compartment 1 and corresponding mounting boxes 9, which are placed radially inside the compartment 1 close to the center thereof.
  • the cross section of both the openings 8 and mounting boxes 9 corresponds substantially to the cross section of the tubes 7. In this way, the tubes 7 may be removed and/or replaced during operation of the apparatus.
  • the shown apparatus also comprises an inlet 10 for introducing a pulverulent or particulate mineral material into the compartment 1 in order to control the temperature inside the compartment.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Incineration Of Waste (AREA)

Abstract

Described is an apparatus for incineration of combustible matter, which apparatus comprises a compartment (1) for incineration of the combustible matter, an air duct (2) for supplying hot air into the compartment (1), which compartment (1) comprises an inlet (3) in its upper part for introducing the combustible matter into the compartment (1) at least partly by gravity, an outlet (4) for extracting slag and any unburned matter and a rotary disc (5) for supporting and transportation of the combustible matter, during the incineration, from the inlet (3) to the outlet (4) of the compartment (1). The apparatus is peculiar in that it comprises retaining means (7) being placed below the inlet (3) for combustible matter in a distance above the rotary disc (5) in order to prevent introduced combustible matter above a given size from falling down onto the disc (5). Hereby is obtained an apparatus which has a significant larger capacity because combustible matter with a larger size spread may be introduced and processed at the same time without compromising on the degree of burnout of especially those parts of the combustible matter having the largest particle sizes.

Description

AN APPARATUS FOR INCINERATION OF COMBUSTIBLE MATTER
Field of the Invention The present invention relates to an apparatus for incineration of combustible matter, which apparatus comprises a compartment for incineration of the combustible matter, an air duct for supplying hot air into the compartment, which compartment comprises an inlet in its upper part for introducing the combustible matter into the compartment at least partly by gravity, an outlet for extracting slag and any unburned matter and a rotary disc for supporting and transportation of the combustible matter, during the incineration, from the inlet to the outlet of the compartment.
Non-limiting examples of combustible matter include, besides from fossil fuel like coal, tyres, furniture, carpets, wood refuse, garden waste, kitchen waste, paper sludge, sewage sludge and bleaching earth.
Background An apparatus of the above mentioned kind is known from EP 1200778, which is owned by the applicant of the present invention. In actual practice, a number of limitations have been ascertained in relation to this know apparatus. Because the residence time, in which the combustible matter is in the compartment, is determined by the rotation speed of the disc, the size range of the material, which is introduced over a given period into the compartment, is rather narrow, if substantially complete incineration of combustible matter should be obtained. This may further influence on the capacity of the apparatus, as the rotation speed should be selected for the combustible matter, which requires the longest residence time. Further, compactable combustible matter has a tendency to remain stagnant on the disc, thus being not exposed to the required heat and/or oxygen to obtain complete incineration before it reaches the outlet of the compartment. It is the object of the present invention to provide an apparatus for incineration of combustible matter by which the aforementioned disadvantages are remedied or significantly reduced.
Summary
According to the present invention this is obtained by an apparatus of the kind mentioned in the introduction, being characterized in that it comprises retaining means being placed below the inlet for combustible matter in a distance above the rotary disc in order to prevent introduced combustible matter above a given size from falling down onto the disc.
Hereby is obtained an apparatus which has a significant larger capacity because combustible matter with a larger size spread may be introduced and processed at the same time without compromising on the degree of burnout of especially those parts of the combustible matter having the largest particle sizes. This is due to the fact that, as the combustible matter enters the compartment at its upper part, the smaller particles are allowed to pass by the retaining means and fall down to the rotary disc, whereas the larger particles, such as whole tires etc., are retained by the retaining means, thus a faster and more complete burnout of these larger particles are obtained. As the larger particles burn off the remaining pieces may fall down onto the disc when they are small enough to pass the retaining means. Further, the resulting bed of combustible matter on the rotary disc is less compact which allows for a more complete combustion of the smaller particles as well. Thus, generally, the apparatus according to the invention allows for more efficient use of the internal volume of the compartment.
The retaining means may in principle be constituted of any suitable means that act as a sieve in order to retain particles above a given size while allowing smaller particles to pass and fall down onto the disc. Thus, the retaining means may comprise a kind of a grate or a number of wires, which are mounted inside the compartment below the inlet for combustible matter. However, in a preferred embodiment the retaining means comprise a number of tubes.
The retaining means are exposed to a dusty and a high temperature environment, hence it is preferred that they are made of a high temperature corrosion resistant alloy, such as HR-160® marketed by Haynes International, Inc. or the somewhat cheaper 253MA® marketed by Avesta Welding.
In case the retaining means comprise a number of tubes, said tubes may be mounted radially relative to the disc with a distance there between. In this way the distance between the tubes increases in the direction away from the center of the disc. The tube may as an alternative be mounted parallel to each other with a certain distance there between. In this way the distance between the tubes is the same over the entire length of the tubes, which may be an advantage in some situations.
Further, the retaining means may vertically be mounted in the same or different distances from the rotary disc, thus describing a horizontal or an inclined surface, respectively, or they may be mounted in a way that permits adjustment between a horizontal and an inclined surface.
In case the retaining means comprise a number of tubes, said tubes may be mounted in a descending arrangement, which enabling gradually movement of the larger combustible matter particles towards the rotary disc. Further, it is preferred that the tubes are mounted in a way that enables removal and/or replacement of these during operation of the apparatus. This may be realized by providing openings in a side wall of the compartment and corresponding mounting boxes placed radially inside the compartment close to the center thereof, where the cross section of both the openings and mounting boxes is adapted to a selected cross section of the tubes. In addition, the retaining means may be subject to cooling by proper means, preferably arranged inside the retaining means.
Brief description of the drawings
The invention will now be explained in further details with reference to the drawing, being diagrammatical, and and with its only figure showing an apparatus according to the invention.
Detailed description
In the figure is seen an apparatus for incineration of combustible matter. The shown apparatus comprises a compartment 1 for incineration of the combustible matter and an air duct 2 for supplying hot air into the compartment 1 . The compartment 1 comprises an inlet 3 in its upper part for introducing the combustible matter into the compartment, an outlet 4 for extracting slag and any unburned matter and a rotary disc 5 for supporting and transportation of the combustible matter, during the incineration, from the inlet 3 to the outlet 4 of the compartment, as indicated by the arrow 6.
Further, the shown apparatus comprises six tubes 7, which are mounted below the inlet for 3 combustible matter. The tubes 7 are placed radially relative to the disc 5 with an outwardly increasing distance there between, hence preventing introduced combustible matter above a given size from falling down onto the disc
5 while allowing smaller particles to pass and fall down onto the rotary disc 5. In this way, the larger particles, which are retained by the tubes 7, will burn faster, thus ensuring a more complete burnout of these. In addition, the bed on the rotary disc 5, consisting of smaller particles of combustible matter and residues, which have fallen down from the tubes 7, is less compact, which allows for a more complete combustion of the smaller particles as well. Hereby is obtained an apparatus which has a significant larger capacity because combustible matter with a larger size spread may be introduced and processed at the same time without compromising on the degree of burnout of especially those parts of the combustible matter having the largest particle sizes. In the shown embodiment the tubes 7 are placed in different distances above the disc 5, hence providing a descending surface, which enabling gradually movement of the larger combustible matter particles towards the rotary disc 5.
Further, the apparatus comprises six openings 8 in a side wall of the compartment 1 and corresponding mounting boxes 9, which are placed radially inside the compartment 1 close to the center thereof. The cross section of both the openings 8 and mounting boxes 9 corresponds substantially to the cross section of the tubes 7. In this way, the tubes 7 may be removed and/or replaced during operation of the apparatus.
The shown apparatus also comprises an inlet 10 for introducing a pulverulent or particulate mineral material into the compartment 1 in order to control the temperature inside the compartment.

Claims

Claims
1 . Apparatus for incineration of combustible matter, which apparatus comprises a compartment (1 ) for incineration of the combustible matter, an air duct (2) for supplying hot air into the compartment (1 ), which compartment (1 ) comprises an inlet (3) in its upper part for introducing the combustible matter into the compartment (1 ) at least partly by gravity, an outlet (4) for extracting slag and any unburned matter and a rotary disc (5) for supporting and transportation of the combustible matter, during the incineration, from the inlet (3) to the outlet (4) of the compartment (1 ), characterized in that that it comprises retaining means (7) being placed below the inlet (3) for combustible matter in a distance above the rotary disc (5) in order to prevent introduced combustible matter above a given size from falling down onto the disc (5).
2. Apparatus according to claim 1 , characterized in that the retaining means (7) comprise a number of tubes (7).
3. Apparatus according to claim 2, characterized in that the tubes (7) are mounted radially relative to the disc (5) with a distance there between.
4. Apparatus according to claim 2, characterized in that the tubes (7) are mounted parallel to each other with a certain distance there between.
5. Apparatus according to claim 2, characterized in that the tubes (7) are mounted in a descending arrangement.
6. Apparatus according to claim 2, characterized in that the tubes are mounted in way that enables removal and/or replacement of these during operation of the apparatus.
7. Apparatus according to claim 1 , characterized in that the retaining means (7) vertically are mounted in the same distance from the rotary disc (5).
8. Apparatus according to claim 1 , characterized in that the retaining means (7) vertically are mounted in different distances from the rotary disc (5).
9. Apparatus according to claim 1 , characterized in that it comprises means for cooling the retaining means (7).
10. Apparatus according to claim 9, characterized in that the cooling means are arranged inside the retaining means (7).
PCT/EP2013/062064 2013-06-11 2013-06-11 Rotary bottom disc incinerator Ceased WO2014198305A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/EP2013/062064 WO2014198305A1 (en) 2013-06-11 2013-06-11 Rotary bottom disc incinerator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2013/062064 WO2014198305A1 (en) 2013-06-11 2013-06-11 Rotary bottom disc incinerator

Publications (1)

Publication Number Publication Date
WO2014198305A1 true WO2014198305A1 (en) 2014-12-18

Family

ID=48607271

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2013/062064 Ceased WO2014198305A1 (en) 2013-06-11 2013-06-11 Rotary bottom disc incinerator

Country Status (1)

Country Link
WO (1) WO2014198305A1 (en)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS49114770U (en) * 1973-01-23 1974-10-01
FR2614394A1 (en) * 1987-04-24 1988-10-28 Idee Sarl Incineration furnace with hearth rotating around a vertical axis
EP1200778A1 (en) 1999-07-30 2002-05-02 F.L. Smidth & Co. A/S Method and apparatus for incineration of combustible waste during the manufacture of cement clinker
CN100445638C (en) * 2004-06-14 2008-12-24 张维田 Garbage incinerating method and continuous garbage incinerating system

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS49114770U (en) * 1973-01-23 1974-10-01
FR2614394A1 (en) * 1987-04-24 1988-10-28 Idee Sarl Incineration furnace with hearth rotating around a vertical axis
EP1200778A1 (en) 1999-07-30 2002-05-02 F.L. Smidth & Co. A/S Method and apparatus for incineration of combustible waste during the manufacture of cement clinker
CN100445638C (en) * 2004-06-14 2008-12-24 张维田 Garbage incinerating method and continuous garbage incinerating system

Similar Documents

Publication Publication Date Title
JP5828910B2 (en) Continuous combustion equipment for solid fuel containing incombustibles
US4836115A (en) Vertical furnace
JP5794726B2 (en) Coal boiler equipment and operation method of coal boiler equipment
JP2013224810A5 (en)
JPH03501997A (en) Garbage fuel processing system for equipment that uses garbage fuel as fuel for power generation plants
US8590463B1 (en) Method and apparatus for drying solid fuels
JP6183068B2 (en) Fluidized bed boiler and its operation method
US3022753A (en) Incinerator
WO2014198305A1 (en) Rotary bottom disc incinerator
US2033685A (en) Boiler furnace
KR101542845B1 (en) Bubbling fluidized bed combustor system
US4269125A (en) Pulverizer rejects disposal
JP2016061475A (en) Biomass combustion boiler
US3557726A (en) Incinerator
JP5422514B2 (en) Solid fuel fired boiler
JP7191642B2 (en) Boiler, ash processing equipment, method of operating boiler and method of operating ash processing equipment
JP6150596B2 (en) Solid fuel combustion device and boiler device
US20140083339A1 (en) Incinerator having afterburner grate
US4366759A (en) Mass burning self-cleaning incinerator
JP2014152973A (en) Mobile incineration facility
RU2244873C2 (en) Furnace for burning wood wastes in fluidized bed
CN105674304A (en) Garden waste incineration boiler
US455802A (en) stanleys j
RU2772092C1 (en) Boiler for burning coal, crushed municipal waste and method of its operation
JP2011226691A (en) Solid fuel combustion device and boiler device

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 13728192

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 13728192

Country of ref document: EP

Kind code of ref document: A1