US20130206045A1 - Crematorium oven - Google Patents

Crematorium oven Download PDF

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Publication number
US20130206045A1
US20130206045A1 US13/806,618 US201113806618A US2013206045A1 US 20130206045 A1 US20130206045 A1 US 20130206045A1 US 201113806618 A US201113806618 A US 201113806618A US 2013206045 A1 US2013206045 A1 US 2013206045A1
Authority
US
United States
Prior art keywords
combustion chamber
flue gas
chamber section
combustion
gas return
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.)
Abandoned
Application number
US13/806,618
Other languages
English (en)
Inventor
Zhiyong Yu
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.)
FIEN KREMATECH GmbH
Original Assignee
FIEN KREMATECH GmbH
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 FIEN KREMATECH GmbH filed Critical FIEN KREMATECH GmbH
Assigned to FIEN-KREMATECH, GMBH reassignment FIEN-KREMATECH, GMBH ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: YU, ZHIYONG
Publication of US20130206045A1 publication Critical patent/US20130206045A1/en
Abandoned 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
    • F23G1/00—Furnaces for cremation of human or animal carcasses
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN  A CARRIER GAS OR AIR 
    • F23C9/00—Combustion apparatus characterised by arrangements for returning combustion products or flue gases to the combustion chamber
    • F23C9/08—Combustion apparatus characterised by arrangements for returning combustion products or flue gases to the combustion chamber for reducing temperature in combustion chamber, e.g. for protecting walls of combustion chamber
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN  A CARRIER GAS OR AIR 
    • F23C2202/00—Fluegas recirculation
    • F23C2202/30—Premixing fluegas with combustion air
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN  A CARRIER GAS OR AIR 
    • F23C2900/00—Special features of, or arrangements for combustion apparatus using fluid fuels or solid fuels suspended in air; Combustion processes therefor
    • F23C2900/09002—Specific devices inducing or forcing flue gas recirculation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G2900/00—Special features of, or arrangements for incinerators
    • F23G2900/00001—Exhaust gas recirculation

Definitions

  • the present invention relates to a crematorium oven.
  • Crematorium ovens are already known from the prior art. They essential comprise a combustion chamber with a ceiling, wall and base on which to place the object to be cremated, a heat supply system for heating the combustion chamber as well as a combustion air supply and a flue gas outlet.
  • Crematorium ovens which have a combustion chamber with two combustion chamber sections, whereby in the first combustion chamber section preliminary incineration of the object to be cremated takes place, with subsequent incineration of the remains from the first combustion chamber section taking place in the second combustion chamber section.
  • the cremation remains from a first incineration phase remaining in a first combustion chamber section are transferred to the second combustion chamber section manually or with a removal device, whereby the heat produced in the first combustion section to incinerate a second object for cremation is used for the subsequent incineration of the cremated remains in the second combustion chamber section.
  • crematorium ovens have a low efficiency so that during combustion a high energy supply through the heat supply system is necessary and the fuel consumption is therefore high. Furthermore the duration of a cremation is very long as it is determined by the difficult and slowly burning parts of the object being cremated.
  • the object of the invention is to provide a crematorium oven, which allows the energy-efficient and rapid incineration of an object to be cremated.
  • the present invention provides a crematorium oven comprising at least one combustion chamber with a ceiling, wall and a base on which to place the object to be cremated, a heat supply system, a combustion air supply and a flue gas outlet.
  • a combustion air supply channel and at least one flue gas return channel are provided, whereby the flue gas return channel in the ceiling, and/or the wall and/or the base has an inlet and an outlet.
  • the at least one combustion air supply channel opens into the at least one flue gas return channel, so that the supplied combustion air causes a suction effect of the combustion air supply into the combustion chamber. In this way at least part of the flue gas produced during the combustion process is drawn into the inlet of the flue gas return channel and emitted through the outlet of the flue gas return channel into the combustion chamber and is thereby supplied to the combustion process again.
  • the return of flue gas in accordance with the invention brings about a return of the thermal energy contained in the flue gas, and on the other hand the subsequent incineration of not fully burned and/or still burnable components in the flue gas.
  • Mixing of the flue gas returned in the flue gas return channel with the combustion air takes place and thereby preheats the combustion air.
  • Further preheating of the combustion air is brought about in that the flue gas return channel and the combustion air supply channel are arranged in the ceiling and/or the wall and/or the base of the combustion chamber.
  • these parts are at very high temperatures so that the temperature of the combustion gas is considerably increased.
  • the gas mixture ignites on that a flame emerges at the outlet to the flue gas return channel.
  • the efficiency of the crematorium oven is increased considerably.
  • the energy requirement of a crematorium oven can be reduced by 80% and more.
  • conventional crematorium ovens require around 30 m 3 to 35 m 3 of natural gas to incinerate an object for cremation
  • the crematorium oven in accordance with the invention consumes 6 m 3 to 7 m 3 , in extreme cases even 3 m 3 to 5 m 3 natural gas.
  • the combustion air supply channels can be arranged in any number of loops within the ceiling and/or the wall and/or the base of the combustion chamber. The longer the path of the combustion air supply channels and the longer the supply time of the combustion air is extended, the more thermal energy is taken up by the combustion air through the strongly heated parts of the combustion chamber. Through preheating of the combustion air the object for cremation is more completely incinerated.
  • flue gas return channels and/or several combustion air supply channels are provided, which are preferably locally arranged evenly distributed along the object to be cremated. In this way targeted, locally-distributed flue gas return and an improvement in the burning of difficult to burn and/or slowly burning parts of the object to be cremated can take place.
  • At least one combustion air supply channel opens into several flue gas return channels.
  • a flame emerges at the outlet of the flue gas return channel which in the case of a suitably selected arrangement of the outlets of the flue gas return channels can be directed directly at the object to be cremated, more particularly the difficult to burn or slowly burning parts of the object to be cremated.
  • all the combustion air supply channels are connected to a central combustion air supply.
  • a central combustion air supply pressurised combustion air is supplied to the combustion air supply channels by way of a fan, for example, which brings about a suction effect in the flue gas return channels connected to the combustion air supply channels.
  • the flue gas return channels In the ceiling and/or in the walls and/or in the base of the combustion chamber the flue gas return channels have an inlet and an outlet.
  • the inlet of a flue gas return channel arranged in the wall is arranged above the outlet.
  • the combustion chamber has a first and a second combustion chamber section, whereby the first combustion chamber section is designed for the preliminary burning of the object to be cremated and the second combustion chamber section for the subsequent incineration of the cremated remains and/or mineralisation of the ashes from the first combustion chamber section.
  • the first combustion chamber section is designed for the preliminary burning of the object to be cremated and the second combustion chamber section for the subsequent incineration of the cremated remains and/or mineralisation of the ashes from the first combustion chamber section.
  • the base brings about an at least partial separation of the combustion chamber into a first and a second combustion chamber section, whereby the combustion gases produced in the first combustion chamber section are drawn off via the second combustion chamber section and the central flue gas outlet connected thereto.
  • a flue gas return channel passes through the base in such a way that a continuous connection between the first and second combustion chamber section is produced.
  • the base has several elevations which are designed so that the object to be cremated is a placed at a distance from the base.
  • the elevations are each provided adjacent to the outlets of the flue gas return channels.
  • the gases which are mixed with the combustion air and preferably ignited can flow around the object to be cremated and/or the flames emerging from the outlets of the flue gas return channels can blaze around the underside of the object to be cremated so that especially these slowly burning areas undergo accelerated incineration through the increased heat effect.
  • FIG. 1 shows as an example a schematic lateral cross-section of a crematorium oven in accordance with the invention
  • FIG. 2 shows as an example a partial cross-section through the wall of the crematorium oven in FIG. 1 along line A-A.
  • FIG. 3 shows as an example a partial cross-section along the base of the crematorium oven in FIG. 1 .
  • reference number 1 denotes a crematorium oven in accordance with the invention. Dashed lines indicate that the relevant object is not shown in the sectional plan, but is located in the walls or in the base of the crematorium oven.
  • the crematorium oven 1 has a combustion chamber 2 , which is surrounded by a wall 2 . 1 on its outer circumference.
  • the wall 2 . 1 is designed in several layers, namely an outer layer formed by a housing 2 . 2 . and a second internally adjoining layer forming an insulation 2 . 3 .
  • a heat supply system 4 which supplies thermal energy to the combustion chamber 2 .
  • the heat supply system 4 is, more particularly, a burner, for example a gas or oil burner.
  • the crematorium oven 1 also has a combustion air supply 5 and a flue gas outlet 6 .
  • a combustion air supply 5 pressurised air is supplied to the combustion chamber 2 by means of a fan for example.
  • the combustion air can be fresh air, fresh air enriched with oxygen or also pure oxygen.
  • the flue gases produced during combustion are removed from the combustion chamber 2 via the flue gas outlet 6 and a chimney preferably comprising a flue gas treatment device.
  • a ceiling (not shown) and abase 3 on which the object to be cremated is placed for burning are provided in the combustion chamber 2 .
  • At least one combustion air supply channel 7 and at least one flue gas return channel 8 is provided, whereby these channels 7 , 8 are connected to each other in such a way that through the suction effect of the combustion air supply into the combustion chamber 2 at least part of the flue gas produced during the incineration is returned to the combustion process via the flue gas return channel 8 .
  • a branched network of combustion air supply channels 7 is provided in the wall 2 . 1 of the combustion chamber 2 and in the base 3 .
  • the combustion air supply channels 7 are all connected to the central combustion air supply 5 so that via this combustion air supply 5 pressurised combustion air is distributed into the combustion air supply channel 7 by way of a fan for example.
  • flue gas return channels 8 are also provided within the wall 2 . 1 of the combustion chamber 2 and in the base 3 .
  • the flue gas return channels 8 within the wall 2 . 1 of the combustion chamber 2 run parallel to the vertical axis HA of the crematorium oven 1 and can be formed in the insulation 2 . 3 and/or casing 2 . 2 or be formed by tubular elements arranged within the combustion chamber 2 .
  • the flue gas return channels 8 run at an acute angle to the vertical axis HA and preferably pass completely through the base.
  • the flue gas return channels 8 are preferably locally distributed along the lateral axis QA of the combustion chamber 2 .
  • the combustion air supply channel 7 or branches from this combustion air supply channel 7 are each connected to the individual flue gas return channels 8 in such a way that through the suction effect the flue gas produced by the incineration is drawn into the inlet 8 . 1 and emitted though the outlet 8 . 2 .
  • one combustion air supply channel 7 or a branch from this combustion air supply channel 7 opens into several flue gas return channels 8 . In this way mixing of the drawn flue gas with freshly supplied combustion air occurs in the flue gas return channels 8 and after ignition of the gas mixtures afterburning takes place.
  • the base 3 is arranged within the combustion chamber 2 in such a way that the combustion chamber 2 is divided into a first and a second combustion chamber 2 a , 2 b.
  • the first combustion chamber section 2 a is preferably arranged above the second combustion chamber section 2 b .
  • the combustion chamber 2 is only partially divided into combustion chamber sections 2 a, 2 b so that gas produced in the first combustion chamber section 2 a escapes, as indicated by the arrow 10 , via the second combustion chamber 2 b and the flue gas outlet 6 provided there.
  • the object to be cremated is introduced into the first combustion chamber section 2 a in such a way that after a heating up phase of the crematorium oven 1 through the supply of energy from the heat supply system 4 it is placed at least partially on the base 3 .
  • the object to be cremated does not lie completely on the base 3 but is held on elevations 9 at a distance from the base 3 .
  • the object to be cremated is burned in the first combustion chamber section 2 a.
  • the remaining, not completely incinerated remains of the object to be cremated are transferred to the second combustion chamber section 2 b for afterburning in a second incineration phase, so that after the second incineration phase complete cremation of the object to be cremated has taken place.
  • FIG. 2 shows a flue gas return channel 8 incorporated into the wall 2 . 1 of the combustion chamber 2 with a combustion air supply channel 7 opening into it.
  • the flue gas return channel 8 has an inlet 8 . 1 and an outlet 8 . 2 , whereby the inlet 8 . 1 is provided above the outlet 8 . 2 .
  • both the flue gas return channel 8 as well as the combustion air supply channel 7 run within the insulation 2 . 3 .
  • the flue gas return channel 8 essentially comprises three channel sections 8 . 3 , 8 . 4 and 8 . 5 running in an approximately straight line, whereby the first channel section 8 . 3 approximately runs perpendicularly to the second channel section 8 . 4 and the second channel section 8 . 4 runs approximately perpendicularly to the third channel section 8 . 5 .
  • the first and third channel sections 8 . 3 , 8 . 5 are in parallel and at a distance from one another and at the free end form the inlet 8 . 1 and the outlet 8 . 2 respectively.
  • the first to third channel sections 8 . 3 , 8 . 4 and 8 . 5 are connect to a continuous flue gas return channel 8 via arched channel connection sections. In the arched channel connection section between the second 8 . 4 and the third channel section 8 . 5 the combustion air supply channels 7 or a branch from a combustion air supply channel 7 opens into the flue gas return channel 8 .
  • FIG. 3 shows a sectional view of the base of the crematorium oven 1 in accordance with the invention.
  • the base 3 which at least partially separates the first combustion chamber section 2 a from the second combustion chamber section 2 b is traversed by at least one flue gas return channel 8 which has an inlet 8 . 1 on its underside and an outlet 8 . 2 on its upper side.
  • the base 3 has an elevation 9 , which in the shown example of embodiment is in the shape of a tongue.
  • the tongue-shaped elevation 9 is designed in such a way that at the top the outlet 8 . 2 is covered by the elevation 9 . This effectively prevents combustion residues falling through from the first combustion chamber section 2 a into the second combustion chamber section 2 b.
  • a combustion air supply channel 7 or a branch from a combustion air supply channel 7 which opens into the flue gas return channel 8 .
  • a suction effect is produced at the inlet 8 . 1 of the flue gas return channel 8 which causes flue gas to be returned from the second combustion chamber section 2 b into the first combustion chamber section 2 a.
  • freshly supplied combustion air is mixed with the returned flue gas from the second combustion chamber section 2 b and at a sufficiently high temperature is ignited within the combustion chamber 2 so that a flame is produced in the flue gas return channel 8 and, more particularly, at the outlet 8 . 2 .
  • the flames emerging at the outlet 8 .

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Incineration Of Waste (AREA)
  • Combustion Of Fluid Fuel (AREA)
US13/806,618 2010-06-25 2011-06-22 Crematorium oven Abandoned US20130206045A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE102010017578.1 2010-06-25
DE102010017578A DE102010017578B3 (de) 2010-06-25 2010-06-25 Krematoriumsofen
PCT/DE2011/075147 WO2012022327A1 (fr) 2010-06-25 2011-06-22 Four crématoire

Publications (1)

Publication Number Publication Date
US20130206045A1 true US20130206045A1 (en) 2013-08-15

Family

ID=44680965

Family Applications (1)

Application Number Title Priority Date Filing Date
US13/806,618 Abandoned US20130206045A1 (en) 2010-06-25 2011-06-22 Crematorium oven

Country Status (6)

Country Link
US (1) US20130206045A1 (fr)
EP (1) EP2564120B1 (fr)
CN (1) CN102959332B (fr)
DE (1) DE102010017578B3 (fr)
PL (1) PL2564120T3 (fr)
WO (1) WO2012022327A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3777676A (en) * 1972-07-31 1973-12-11 W Lagen Apparatus and technique for incinerating solid fuels containing carbonizable material
US4167909A (en) * 1976-12-09 1979-09-18 Dauvergne Hector A Solid fuel burner
US20090320725A1 (en) * 2008-06-25 2009-12-31 Alstom Technology Ltd. Furnace system with internal flue gas recirculation
US8590463B1 (en) * 2008-05-23 2013-11-26 Daniel Richard Higgins Method and apparatus for drying solid fuels

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3749031A (en) * 1971-11-08 1973-07-31 Wasteco Inc Controlled atmosphere incinerator
US3815523A (en) * 1973-04-04 1974-06-11 Kleenaire Recycling Syst Inc Incinerator
US3799077A (en) * 1973-04-05 1974-03-26 R Lowe Low-pollution trash incinerator
CH677139A5 (fr) * 1988-06-24 1991-04-15 Ygnis Sa
DE4118261A1 (de) * 1991-06-04 1992-12-10 Viessmann Hans Geblaesebrenner fuer heizkessel
DE4402172C2 (de) * 1994-01-26 2000-09-28 Steinmueller Gmbh L & C Verfahren zur Verbrennung von Brennstoff und Anlage zur Durchführung des Verfahrens
DE19628741C2 (de) * 1996-07-17 1999-11-04 Sbw Sonderabfallentsorgung Bad Verfahren zur Feuerbestattung
DE19652967C1 (de) * 1996-12-19 1998-04-09 Sbw Sonderabfallentsorgung Bad Feuerbestattungseinrichtung
DE19732867A1 (de) * 1997-07-18 1999-01-21 Linde Ag Verfahren und Vorrichtung zum Betreiben von Gasbrennern
CN2423490Y (zh) * 2000-05-23 2001-03-14 北京市火化设备厂 火化用台车
HU222415B1 (hu) * 2000-07-13 2003-07-28 Gábor Földes Forgórendszerű hamvasztóberendezés
FR2850734B1 (fr) * 2003-02-05 2006-02-03 Abderrahmann Serdjebi Dispositif anti-pollution atmospherique s'adaptant sur tous les appareils a combustion
ITMI20052405A1 (it) * 2005-12-16 2007-06-17 Associazione Comitato Ev K2 Cn Sistema d'inceneritore di rifiuti indiferrenziati
DE102007045623B4 (de) * 2007-09-24 2009-07-23 Knorr-Bremse Systeme für Nutzfahrzeuge GmbH Verfahren und Vorrichtung zum Verbessern einer Abgasrückführung einer Verbrennungskraftmaschine
CN201434390Y (zh) * 2009-07-07 2010-03-31 成都普兰斯纳科技有限公司 一种宠物遗体焚化炉

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3777676A (en) * 1972-07-31 1973-12-11 W Lagen Apparatus and technique for incinerating solid fuels containing carbonizable material
US4167909A (en) * 1976-12-09 1979-09-18 Dauvergne Hector A Solid fuel burner
US8590463B1 (en) * 2008-05-23 2013-11-26 Daniel Richard Higgins Method and apparatus for drying solid fuels
US20090320725A1 (en) * 2008-06-25 2009-12-31 Alstom Technology Ltd. Furnace system with internal flue gas recirculation

Also Published As

Publication number Publication date
WO2012022327A1 (fr) 2012-02-23
EP2564120A1 (fr) 2013-03-06
DE102010017578B3 (de) 2012-01-05
CN102959332A (zh) 2013-03-06
CN102959332B (zh) 2015-03-25
PL2564120T3 (pl) 2014-08-29
EP2564120B1 (fr) 2014-01-15

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Legal Events

Date Code Title Description
AS Assignment

Owner name: FIEN-KREMATECH, GMBH, GERMANY

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:YU, ZHIYONG;REEL/FRAME:030734/0073

Effective date: 20130315

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION