EP0419365B1 - Dispositif pour réaliser l'injection de boues dans un incinérateur - Google Patents

Dispositif pour réaliser l'injection de boues dans un incinérateur Download PDF

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Publication number
EP0419365B1
EP0419365B1 EP90402609A EP90402609A EP0419365B1 EP 0419365 B1 EP0419365 B1 EP 0419365B1 EP 90402609 A EP90402609 A EP 90402609A EP 90402609 A EP90402609 A EP 90402609A EP 0419365 B1 EP0419365 B1 EP 0419365B1
Authority
EP
European Patent Office
Prior art keywords
injector
distribution chamber
injectors
sludge
cleaning
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
EP90402609A
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German (de)
English (en)
French (fr)
Other versions
EP0419365A1 (fr
Inventor
Guy Baria
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.)
Individual
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Individual
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Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to AT90402609T priority Critical patent/ATE84867T1/de
Publication of EP0419365A1 publication Critical patent/EP0419365A1/fr
Application granted granted Critical
Publication of EP0419365B1 publication Critical patent/EP0419365B1/fr
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
    • F23G5/50—Control or safety arrangements
    • 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

Definitions

  • the present invention relates to a device for carrying out an introduction by injection of sludge into the combustion chamber of an incinerator.
  • the present invention proposes to provide a solution which deviates from the solutions previously used to ensure the introduction of sludge into the combustion chamber of an incinerator by allowing a homogeneous supply of sludge by injection into the combustion chamber, according to a constant flow and in a form ensuring a fast combustion and without nuisance.
  • the subject of the present invention is a device making it possible to inject sludge originating in particular from waste water treatment plants, into the combustion chamber of an incinerator, in particular of an incinerator of household waste. , characterized in that it comprises at least one injector of small diameter, fed, at a constant flow rate for all the injectors, via a distribution chamber, each injector consisting of a tube having a cylindrical shape and comprising a conical shaped nozzle, combustion chamber side, with the wide angle situated on the side of the sludge outlet of the injector in that each of the injectors is provided with a cooling system producing a circulation of a fluid cooling, in particular water, in an enclosure delimited between the injection tube and a sleeve surrounding said tube on the side of the foot of the injector, the injection of the r cooling in said enclosure taking place by a supply pipe opening into this enclosure through an orifice positioned under the injection tube, on the side of the injector foot and in that means are provided for regulating the flow rate
  • the diameter of each of the injectors is between 10 and 40 mm.
  • the distribution chamber is of generally tubular shape, with constant section, and the area of its straight section perpendicular to its longitudinal axis is greater than the sum of the areas of the inlet sections.
  • injection tubes which open into the lower part of this distribution chamber.
  • the sludge supply to this distribution chamber can be carried out either by one of its ends or from its upper surface, an evacuation for emptying being provided at one of the ends of the supply chamber.
  • means are provided for ensuring the unclogging and / or cleaning and / or sealing of the different injectors, each of these means being constituted by a rod passing through the distribution chamber and penetrating into the tube. the corresponding injector up to the conical part of the latter, the diameter of each of the rods being less than that of the bore of the cylindrical part of the injection tube.
  • These rods can be operated either manually or by any suitable motor device such as in particular jacks. They may be provided with recall means.
  • the sealing of each of said rods through the body of the distribution chamber is ensured by a system of seals and a grease box and the cooling of each of the rods when it is removed from the corresponding injection tube. , after cleaning and / or sealing is obtained by passing the rod through the mass of sludge present in the distribution chamber and through the grease contained in said grease box.
  • the device which is the subject of the invention comprises at least one injector making it possible to introduce the sludge into the combustion chamber of an incinerator by passing through the thermal protections of this chamber or of the screens boiler furnaces.
  • the problem solved by the invention is to provide a homogeneous and constant flow of sludge into this combustion chamber and for this purpose, in accordance with the invention, the sludge is spun through each injector which is thermally regulated so to calibrate the mud flange thus introduced into the combustion chamber.
  • each injector consists of a tube 18 of cylindrical shape, the mouth side 20 of which has a conical shape with a large diameter located on the side of the sludge outlet, this in particular in order to 'avoid jams, as will be described below.
  • the other end of the injection tube 18 is fixed to the distribution chamber 12 by any suitable means, for example by a system of flanges and nuts as can be clearly seen in FIG. 2.
  • Each of the injectors has a small inlet diameter which, according to the present invention, is between 10 and 40 mm. Its length is for example of the order of 350 mm between the entry of the sludge at the foot of the injector and their exit at the end of the nozzle 20 of the latter.
  • FIG. 4 illustrates by way of non-limiting example a method of mounting an injector 10 on the fin of the screen tubes 60 of the wall 62 of a household waste incineration oven.
  • FIG. 4 can consider other fastening systems for example directly on the structure of the combustion chamber or in the masonry of an incinerator without recovery system.
  • each injector such as 10 is carried out using the distribution chamber 12 to which the sludge is delivered using a supply pump (not shown in the drawing).
  • this chamber is in the form of a body 40 of generally tubular shape, the upper part 42 of which is removable so as to be able to act as an inspection hatch.
  • the introduction of sludge into this distribution chamber can be carried out either through one of the end walls of the chamber or by means of an introduction orifice provided on the upper part 42 of the body of this room.
  • the introduction of the sludge is carried out by means of a supply pipe 44, at one of the ends of the body 40, on which a inlet valve 46.
  • the end of the body of the distribution chamber opposite the arrival of the sludge (tubing 44) is provided with a sewerage tubing 36 provided with a valve 38.
  • the lower part of the body 40 of the distribution box has orifices 48 on each of which opens an injector.
  • the surface of the cross section perpendicular to its longitudinal axis, of the distribution chamber 12 is greater than the sum of the surfaces of the orifices 48 through which the sludge supply to each injector tube takes place.
  • each injector that is to say on the side of the distribution chamber 12
  • a sleeve 22 surrounding the cylindrical tube 18 thereby providing a chamber 24 in which a cooling fluid circulates , in particular water, which vaporizes in said chamber.
  • This coolant is introduced into the chamber 24 using a supply pipe which opens out through an orifice 26 provided under the lower part of the sleeve 22 as can be see in Figure 2, this orifice 26 being located near the foot of the injector.
  • the coolant outlet takes place through an orifice 28 disposed on the sleeve 22 opposite the orifice 26.
  • the pipe 30 which makes it possible to supply the fluid with cooling.
  • this cooling fluid makes it possible to obtain a difference in level with the outlet orifice 28, which ensures the constitution of a guard, the overflow being able to possibly be poured into the tube 36 for draining the body of the distribution chamber 12 downstream of the drain valve 38 of this body.
  • the flow rate of this fluid can be adjusted either manually or automatically using a valve 32 mounted on the tube 30, this valve being able to be controlled in flow rate thanks to a sensor and to a temperature regulator 34 which are placed on the wall of the distribution chamber 12 (FIG. 3).
  • Cooling of the injectors such as 10 by circulation of water is necessary in particular in the case of a rise in temperature beyond the acceptable limit for all the components of the device.
  • the cooling during the injection of the sludge being obtained by the circulation of the sludge through the injector.
  • the invention provides means for ensuring cleaning and / or cleaning and / or sealing of each injector tube.
  • these means comprise for each injector a rod 50 which passes through the wall of the body 40 of the distribution chamber through an orifice 49 which is located in view of the orifice 48 through which the sludge supply to the injector concerned takes place.
  • This rod has a diameter smaller than that of the tube 18 of the injector and its stroke is determined so that it penetrates this tube up to the conical part 20 of the latter.
  • each cleaning rod will have a diameter of 20 mm.
  • the end piece of the rod 50 acts as a cookie cutter with the orifice 48.
  • the rods such as 50 can be actuated by any suitable means, in particular using cylinders 52, pneumatic, hydraulic, supplied with the aid of a distributor 78 or mechanical cylinders.
  • a system of seals, for example a lip seal 54 is interposed between each rod 50 and a spacer 56 ensuring the connection between the body 40 of the distribution chamber and the cylinder of each jack 52 and a box is further provided.
  • grease 58 which is placed in front of the fixing means of each jack 52.
  • each rod 50 when it is removed from an injector 10 after cleaning is cooled by passing through the mass of sludge which is contained in the distribution chamber 12 and then by passing through the grease enclosed in the grease box 58. Furthermore, the presence of this grease which is deposited in the form of a thin film on the outer periphery of the rod 50 makes it possible to ensure self-cleaning of this rod by avoiding collage of sludge.
  • Means are also provided for draining and cleaning the device described above during prolonged shutdown of the device according to the invention. In fact, in the event of the device stopping, it is necessary to drain and clean the distribution chamber 12 in order to avoid the accumulation of sludge and their drying in this chamber.
  • the device therefore comprises cleaning nozzles such as 64 which are preferably arranged on the upper part of the body 34 (see FIG. 3), these nozzles 64 being able to be alternately supplied with compressed air and pressurized water respectively using supply circuits 66, 68 and valves 70 and 72.
  • the emptying is carried out by closing the valve 46 for supplying sludge, by opening the valve 70 of the compressed air circuit 66 so as to supply the cleaning nozzles 64 leading to the distribution chamber 12.
  • the sludge contained in this chamber is driven through the injector (s) such as 10 and the level of sludge in the chamber 12 drops to the upper part of the holes 48 on which the injectors open.
  • the compressed air inlet valve 70 is then closed, the injectors are closed by means of the rods 50, the drain valve 38 is opened and the cleaning water inlet valve 72 is opened .
  • This water introduced into the distribution chamber 12, using the nozzles 64 cleans this chamber and the debris is expelled towards the sewer through the evacuation pipe 36.
  • the valve 72 is closed. .
  • the sludge supply valve 46 is opened and the device can be returned to operation on the understanding that the rods 50 are in the retracted position.
  • the injector sludge supply can then resume.
  • this system of cleaning nozzles 64 can also be used for the introduction under pressure of a disinfectant product into the distribution chamber.
  • the device which is the subject of the invention makes it possible to produce a homogeneous supply and at constant flow rate of the sludge into the combustion chamber of an incinerator.
  • This supply takes place in the form of a rod which is spun through each of the injectors.
  • a calibrated and homogeneous supply is obtained.
  • the characteristic according to which the nozzle of each injector is of conical shape allows penetration of the hot gases coming from the combustion chamber between the external periphery of the rod formed and the wall of the nozzle of the injector, which ensures the formation of a surface crust on the rod improving the combustion of the latter and also carrying out a self-cleaning of the end of each injector.
  • a plurality of injectors regularly distributed along the base of the distribution chamber it is preferable to use a plurality of injectors regularly distributed along the base of the distribution chamber. Excellent results have been obtained on an incineration furnace having a flow rate of 6 tonnes / hour of household waste with a device according to the invention, as described above comprising 22 injectors each having an internal diameter of 22 mm , the hourly sludge injection rate then being 1 ton / hour, the injected sludge having a dry matter content of 25%.
  • the injection pressure in the distribution chamber 12 was 0.8 bar.
  • the automation equipment used comprises pressure sensors 74 placed at the entrance to the distribution chamber, a programmable controller 76 and a cooling control system comprising in particular the thermostatic valve 32 provided on the supply line 30 for injector coolant.
  • a programmed cleaning cycle can be provided, the execution of which makes it possible to avoid reaching the pressure and maintain a constant calibration of the sludge (s) introduced by the injector (s) into the incinerator.
  • magnetic end-of-travel sensors are shown diagrammatically at 80 in FIG. 3, making it possible to detect operating anomalies of the cleaning means and to facilitate interventions.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Treatment Of Sludge (AREA)
  • Gasification And Melting Of Waste (AREA)
  • Incineration Of Waste (AREA)
  • Chemical Treatment Of Metals (AREA)
EP90402609A 1989-09-21 1990-09-20 Dispositif pour réaliser l'injection de boues dans un incinérateur Expired - Lifetime EP0419365B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT90402609T ATE84867T1 (de) 1989-09-21 1990-09-20 Vorrichtung zum einduesen von schlamm in einen muellverbrennungsofen.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
MC207289 1989-09-21
MC892072A MC2073A1 (fr) 1989-09-21 1989-09-21 Injecteur de boues baria

Publications (2)

Publication Number Publication Date
EP0419365A1 EP0419365A1 (fr) 1991-03-27
EP0419365B1 true EP0419365B1 (fr) 1993-01-20

Family

ID=19738199

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90402609A Expired - Lifetime EP0419365B1 (fr) 1989-09-21 1990-09-20 Dispositif pour réaliser l'injection de boues dans un incinérateur

Country Status (13)

Country Link
US (1) US5186111A (enrdf_load_stackoverflow)
EP (1) EP0419365B1 (enrdf_load_stackoverflow)
JP (1) JP3117458B2 (enrdf_load_stackoverflow)
AT (1) ATE84867T1 (enrdf_load_stackoverflow)
CA (1) CA2042023A1 (enrdf_load_stackoverflow)
DE (1) DE69000802T2 (enrdf_load_stackoverflow)
DK (1) DK0419365T3 (enrdf_load_stackoverflow)
ES (1) ES2037536T3 (enrdf_load_stackoverflow)
GR (1) GR3006930T3 (enrdf_load_stackoverflow)
HU (1) HUT56615A (enrdf_load_stackoverflow)
MC (1) MC2073A1 (enrdf_load_stackoverflow)
RU (1) RU2013703C1 (enrdf_load_stackoverflow)
WO (1) WO1991004445A1 (enrdf_load_stackoverflow)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2700605B1 (fr) * 1993-01-19 1995-03-17 Cnim Dispositif d'injection de boues dans un incinérateur de déchets.
FR2758100B1 (fr) * 1997-01-06 1999-02-12 Youssef Bouchalat Procede de traitement et valorisation energetique optimisee des boues de stations d'epuration urbaine et industrielle
US6279493B1 (en) 1998-10-19 2001-08-28 Eco/Technologies, Llc Co-combustion of waste sludge in municipal waste combustors and other furnaces
US6553924B2 (en) 1998-10-19 2003-04-29 Eco/Technologies, Llc Co-combustion of waste sludge in municipal waste combustors and other furnaces
FR2791124B1 (fr) * 1999-03-15 2001-06-29 Mediterranee Const Ind Agencement de repartition et d'injection de boues dans la goulotte d'alimentation d'un four de co-incineration de boues et de dechets
EP1160510B1 (fr) 2000-05-24 2005-09-28 Ondeo Degremont Dispositif pour réaliser l'injection de boues dans un incinérateur
US8356975B2 (en) * 2010-03-23 2013-01-22 United Technologies Corporation Gas turbine engine with non-axisymmetric surface contoured vane platform
US8939278B2 (en) 2010-04-13 2015-01-27 Aerojet Rocketdyne Of De, Inc. Deconsolidation device for particulate material extrusion pump
US8851406B2 (en) 2010-04-13 2014-10-07 Aerojet Rocketdyne Of De, Inc. Pump apparatus including deconsolidator
US9932974B2 (en) 2014-06-05 2018-04-03 Gas Technology Institute Duct having oscillatory side wall

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3575119A (en) * 1968-07-05 1971-04-13 Andrew W Marr Jr Electrical arc apparatus for disintegrating and incinerating a slurry organic material
US3822654A (en) * 1973-01-08 1974-07-09 S Ghelfi Burner for burning various liquid and gaseous combustibles or fuels
FR2316540A2 (fr) * 1975-02-28 1977-01-28 Heurtey Efflutherm Procede et dispositif d'evaporation et d'oxydation thermique d'effluents liquides et de dechets solides sous forme pulverulente
DE2702266A1 (de) * 1977-01-20 1978-07-27 Niklaus Seiler Trocknungs- und verbrennungsanlage
US4206711A (en) * 1978-10-04 1980-06-10 Angelo J. Noce Method and apparatus for processing waste fluid
US4462318A (en) * 1981-12-31 1984-07-31 Ensco, Inc. Waste disposal
US4479441A (en) * 1984-03-13 1984-10-30 Enercon Systems, Incorporated Stepped hearth incinerator with positive clean-out of air feed-tubes
US4785746A (en) * 1985-04-25 1988-11-22 Trw Inc. Carbonaceous slurry combustor

Also Published As

Publication number Publication date
WO1991004445A1 (fr) 1991-04-04
MC2073A1 (fr) 1990-10-03
HUT56615A (en) 1991-09-30
DE69000802D1 (de) 1993-03-04
GR3006930T3 (enrdf_load_stackoverflow) 1993-06-30
JP3117458B2 (ja) 2000-12-11
ATE84867T1 (de) 1993-02-15
EP0419365A1 (fr) 1991-03-27
RU2013703C1 (ru) 1994-05-30
US5186111A (en) 1993-02-16
ES2037536T3 (es) 1993-06-16
DK0419365T3 (da) 1993-05-10
CA2042023A1 (fr) 1991-03-22
HU907932D0 (en) 1991-08-28
JPH04502958A (ja) 1992-05-28
DE69000802T2 (de) 1993-06-09

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