EP0966635B1 - Plant and method for incineration of industrial and household waste and sludge - Google Patents
Plant and method for incineration of industrial and household waste and sludge Download PDFInfo
- Publication number
- EP0966635B1 EP0966635B1 EP98900534A EP98900534A EP0966635B1 EP 0966635 B1 EP0966635 B1 EP 0966635B1 EP 98900534 A EP98900534 A EP 98900534A EP 98900534 A EP98900534 A EP 98900534A EP 0966635 B1 EP0966635 B1 EP 0966635B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- sludge
- waste
- infeed
- combustion chamber
- chute
- 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
Links
Images
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
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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
- F23G5/44—Details; Accessories
- F23G5/442—Waste feed arrangements
- F23G5/444—Waste feed arrangements for solid waste
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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
- F23G5/008—Incineration of waste; Incinerator constructions; Details, accessories or control therefor adapted for burning two or more kinds, e.g. liquid and solid, of waste being fed through separate inlets
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G7/00—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals
- F23G7/001—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals for sludges or waste products from water treatment installations
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G2201/00—Pretreatment
- F23G2201/70—Blending
- F23G2201/702—Blending with other waste
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G2209/00—Specific waste
- F23G2209/12—Sludge, slurries or mixtures of liquids
Definitions
- the present invention relates to a method for incineration of industrial and household waste and sludge with admixed materials, comprising infeed through a generally vertically directed waste infeed chute, a waste infeed means at the bottom of the chute for advancing the waste in a generally horizontal direction, possibly an infeed sluice and a downstream located combustion chamber, comprising a movable grate system at the bottom, for advancing, drying, igniting, burning, and outbuming the waste in the combustion chamber before the slag is conveyed out of the combustion chamber down into the slag chute.
- the waste infeed chute is generally directed vertically in order that the waste can slide downwards through the chute by gravity, while the waste infeed means in the bottom of the chute removes, advances and feeds the waste lying at the bottom into the combustion chamber, possibly through an infeed sluice.
- Known waste infeed means at the bottom of the waste infeed chute are e.g. one or more hydraulic pistons, apron feeders, moving grates or actual combustion grates. known e.g. from US patent No. 4,494,469 and DK patent No. 170,493. Characteristic for the known waste infeed means is e.g. that complete filled. waste bags and waste of similar bulk size easily and undivided can be fed into the combustion chamber, potentially via an infeed sluice, after having passed down through the waste infeed chute, in which the waste functions as a relatively dense plug, securing only small amounts of combustion air following the waste into the combustion chamber, avoiding propagation of the combustion back into the waste infeed chute.
- the combustion takes place in the oven chamber at a pressure lower than ambient pressure, e.g. secured by placing an induced draft fan for the flue gas immediately in front of the chimney of the incineration plant.
- Special sludge ovens for combustion of waste water sludge are known, but will normally require supply of supplementary fuel, e.g. in the form of oil or gas.
- the sludge When feeding the sludge through the ceiling as well as through the wall of the oven, directly into the waste combustion chamber, the sludge falls through a flue gas stream at a temperature of approximately 1000°C, drying out and carrying away many of the fine-grained sludge particles, so that the content of dust in the flue gas is raised remarkably, which is unconvenient, the boiler after the combustion oven being further smudged and the flue gas cleaning demand being increased.
- JP-patent No. 1,305,214 it is known to provide a waste incineration plant with a sludge throwing-in opening in the waste infeed chute and to provide a throwing-in apparatus placed in the waste infeed chute for dispersively throwing sewage sludge into the sludge throwing-in opening.
- the device used for delivering sludge to the throwing-in apparatus is a sludge pump with piping.
- the only purpose specified for the throwing-in apparatus is to disperse the sludge evenly across the waste layer so that a constant mixture between the sewage sludge and the waste is obtained and so that as much sludge as possible with e.g. 70-80% water content can be fed in with the waste without disturbing the combustion too much.
- the dispersion is obtained by means of a number of inlet openings and the same number of ball valves or injection pistons controlled automatically or manually.
- This known technique does not address odour problems, dust problems, unhygienic working conditions, other working environment problems and the potentially associated occupational health problems. Nor does this known technique address controlled admixing into the sludge of other waste material which can not readily be thrown into the waste silo together with municipal and industrial waste on conventional waste incinerator plants.
- the sludge with added further waste materials is fed into the waste infeed chute or infeed sluice, at a position in which there exists a pressure lower than ambient pressure, when the plant is working so that unhygienic dust is sucked into the cold waste and the odour materials are sucked into the combustion chamber, whereby they are burned and removed.
- the sludge with added further waste materials is fed into the combustion chamber in such a way that the development of dust during the combustion process is minimized and the infeed of waste is still performed optimally with respect to combustion, as normally, without any cumbersome, expensive and unhygienic comminution of the waste.
- the infeed is performed close to the bottom part of the waste infeed chute or in the infeed sluice, so that generally all of the time waste is present in the infeed chute or infeed sluice at the level of the mouth of the infeed tube.
- the sludge By providing the infeed tube for sludge in the wall of the waste infeed chute facing the combustion chamber or in the ceiling of the infeed sluice, the sludge will always be positioned on top of the waste being fed into the waste combustion chamber and thus being dried out immediately when entering the combustion chamber.
- infeed tubes evenly distributed over the width of the waste infeed chute or sluice, respectively, whereby the sludge can be distributed evenly over the waste.
- the infeed tube or tubes are preferably connected to a pipeline for the supply of sludge from a pressure-feed applicance upstream connected to a silo for temporary storage of sludge.
- the infeed of sludge can be performed almost hermetically closed with respect to the surroundings.
- the pipeline for supply of sludge may be provided with one or more ring nozzles, for lubricating the inner wall of the pipeline with e.g. a polymer for reduction of the sliding friction between sludge and pipeline.
- the sludge to be incinerated in accordance with the invention may be selected from the group consisting of sludge from waste water cleaning, crude oil sludge, petrochemical waste products, animal sludge, liquid waste, slurry and liquid manure or mixtures thereof, with admixture of materials selected from the group consisting of grate screanings, boiler ash, filter ash, flue gas cleaning products, other waste products from waste incineration plants, shredded waste, plastic waste, car fluff, and stabilizers reducing dust and/or vapour generation and/or unwanted chemical reactions in the combustion chamber.
- the pipelines debouching in separate infeed tubes or in common infeed tubes via a manifold, it is possible to control the infeed speed for the different mixtures, thereby controlling the combustion in the combustion chamber.
- the control can be relatively fast reacting as the infeed of the sludge is placed very close to the combustion process in the combustion chamber.
- the sludge is supplied to the incineration plant via a hermetically closed supply system.
- the infeed quantity of the sludge can be used as one parameter for controlling the burning of waste in the combustion chamber.
- the method preferably comprises pressure-feeding of sludge of varying composition, with admixture of further material to be disposed of or material providing stabilization of the sludge mixture.
- the incineration plant shown in Fig. 1 comprises a waste infeed chute 1 for industrial and household waste and a grate system 2 for advancing the waste through the inlet to the combustion chamber and for advancing the waste in the combustion chamber 3, positioned downstream of the chute 1.
- the waste infeed chute 1 comprises an infeed tube 4 for supply of sludge. The infeed tube is placed close to the bottom part of the waste infeed chute 1 and in the wall in the waste infeed chute 1 facing the combustion chamber 3.
- the infeed tube 4 for supply of sludge is, as shown in the drawing, positioned to debouch in a downwardly slanted angle into the waste infeed chute 1.
- Fig. 2 shows how four infeed tubes 4 are connected to a pipeline 5 for supply of sludge via a manifold 6, intended to provide a uniform distribution of the added sludge across the four infeed tubes 4, the sludge being equally distributed across the feeding direction for the grate system 2 in the waste combustion chamber 3.
- Fig. 3 shows how sludge can be supplied from a storage silo 7 for temporary storage of the sludge, forward to the infeed tube 4 in a hermetically dosed system.
- a pressure-feed appliance 8 is provided close to the silo 7, and a pipeline 5 is connected between the pressure-feed appliance 8 and the infeed tube 4, the pipeline 5 potentially comprising a ring nozzle 9, for lubricating the inner wall of the pipeline 5 with e.g. a polymer for reduction of the sliding friction between sludge and pipeline 5.
Description
Claims (4)
- Method of incinerating industrial and household waste and sludge in an incineration plant comprisinga) feeding the industrial and household waste through a generally vertical directed waste infeed chute (1), comprising means at the bottom of the chute (1) for advancing the waste in a generally horizontal direction, possibly an infeed sluice, and a downstream located combustion chamber (3), comprising a movable grate system at the bottom, for advancing, drying, igniting, buming and outbuming the waste in the combustion chamber (3),b) adding the sludge to be incinerated through at least one infeed tube (4), debouching into the bottom of the infeed chute (1) or sluice, the infeed tube or tubes (4) being connected to a pipeline (5) for the supply of sludge from a pressure feed appliance (8) upstream connected to a silo for temporary storage of sludge,
characterized by further comprising:c) before adding the sludge, further materials to be disposed of are added to the sludge. - Method in accordance with claim 1, characterized by admixed materials being selected from the group consisting of:grate screenings,boiler ash,filter ash,flue gas cleaning products,other waste products from waste incineration plants,shredded waste,plastic waste,car fluff, andstabilizers reducing dust and/or vapour generation and/or unwanted chemical reactions in the combustion chamber (3), or mixtures thereof.
- Method in accordance with any of the preceding claims, characterized by the sludge being selected from the group consisting of:sludge from waste water cleaning,crude oil sludge,petrochemical waste products,animal sludge,liquid waste,slurry, andliquid manure,
- Method in accordance with any of the preceding claims, characterized by
d) lubricating the inner wall of the pipeline (5) for the supply of sludge using one or more ring nozzles (8) for adding the lubricating medium, e.g. a polymer, for reduction of the sliding friction between sludge and pipeline (5).
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DK199700311A DK31197A (en) | 1997-03-19 | 1997-03-19 | Waste incineration plant for industrial and household waste and sewage sludge |
DK31197 | 1997-03-19 | ||
PCT/DK1998/000028 WO1998041795A1 (en) | 1997-03-19 | 1998-01-27 | Plant and method for incineration of industrial and household waste and sludge |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0966635A1 EP0966635A1 (en) | 1999-12-29 |
EP0966635B1 true EP0966635B1 (en) | 2001-09-26 |
Family
ID=8092129
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP98900534A Expired - Lifetime EP0966635B1 (en) | 1997-03-19 | 1998-01-27 | Plant and method for incineration of industrial and household waste and sludge |
Country Status (8)
Country | Link |
---|---|
EP (1) | EP0966635B1 (en) |
JP (1) | JP2001516435A (en) |
KR (1) | KR100527243B1 (en) |
AU (1) | AU5550198A (en) |
DE (1) | DE69801812T2 (en) |
DK (2) | DK31197A (en) |
HK (1) | HK1024736A1 (en) |
WO (1) | WO1998041795A1 (en) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4509695B2 (en) * | 2004-07-28 | 2010-07-21 | 月島環境エンジニアリング株式会社 | Waste liquid incineration treatment method |
WO2014006459A1 (en) | 2012-07-06 | 2014-01-09 | Babcock & Wilcox Vølund A/S | Vibrating grate stoker |
KR101684361B1 (en) * | 2016-03-09 | 2016-12-08 | 주식회사 송림 | incineration apparatus |
CN106439843B (en) * | 2016-09-08 | 2019-03-12 | 南京中特化工动力设备有限公司 | Petrochemical industry not recovering discarded material harmless treatment process |
CN111550809A (en) * | 2020-04-03 | 2020-08-18 | 上海市政工程设计研究总院(集团)有限公司 | Hazardous waste incineration feeding device and method |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4724776A (en) * | 1982-08-03 | 1988-02-16 | Sam Foresto | Burning apparatus with means for heating and cleaning polluted products of combustion |
JPH0663258B2 (en) * | 1987-12-15 | 1994-08-22 | 佐藤工業株式会社 | Pumping device |
JPH01305214A (en) * | 1988-05-31 | 1989-12-08 | Sanki Eng Co Ltd | Fuel mixing burning device for refuse and sewage sludge |
FR2674940B1 (en) * | 1991-05-31 | 1996-08-09 | Paul Gauthier | METHOD AND DEVICE FOR REMOVING WATERS CONTAINING POLLUTANTS DEGRADABLE BY HEAT. |
JPH05264023A (en) * | 1992-01-21 | 1993-10-12 | Chugai Ro Co Ltd | Method of incinerate dehydrated sludge |
-
1997
- 1997-03-19 DK DK199700311A patent/DK31197A/en not_active Application Discontinuation
-
1998
- 1998-01-27 WO PCT/DK1998/000028 patent/WO1998041795A1/en active IP Right Grant
- 1998-01-27 EP EP98900534A patent/EP0966635B1/en not_active Expired - Lifetime
- 1998-01-27 DK DK98900534T patent/DK0966635T3/en active
- 1998-01-27 AU AU55501/98A patent/AU5550198A/en not_active Abandoned
- 1998-01-27 DE DE69801812T patent/DE69801812T2/en not_active Expired - Fee Related
- 1998-01-27 JP JP54003698A patent/JP2001516435A/en active Pending
- 1998-01-27 KR KR10-1999-7008416A patent/KR100527243B1/en active IP Right Grant
-
2000
- 2000-06-19 HK HK00103668A patent/HK1024736A1/en not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
DE69801812T2 (en) | 2002-04-11 |
WO1998041795A1 (en) | 1998-09-24 |
EP0966635A1 (en) | 1999-12-29 |
AU5550198A (en) | 1998-10-12 |
KR100527243B1 (en) | 2005-11-09 |
DE69801812D1 (en) | 2001-10-31 |
DK31197A (en) | 1998-09-20 |
KR20000076315A (en) | 2000-12-26 |
DK0966635T3 (en) | 2002-01-28 |
HK1024736A1 (en) | 2000-10-20 |
JP2001516435A (en) | 2001-09-25 |
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