EP1287304B1 - Procede et dispositif de sechage de boues - Google Patents

Procede et dispositif de sechage de boues Download PDF

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Publication number
EP1287304B1
EP1287304B1 EP01945269A EP01945269A EP1287304B1 EP 1287304 B1 EP1287304 B1 EP 1287304B1 EP 01945269 A EP01945269 A EP 01945269A EP 01945269 A EP01945269 A EP 01945269A EP 1287304 B1 EP1287304 B1 EP 1287304B1
Authority
EP
European Patent Office
Prior art keywords
dried
sludge
separator
conveyor
dryer
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
EP01945269A
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German (de)
English (en)
Other versions
EP1287304A1 (fr
Inventor
Giselher Stummer
Christian Maier
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.)
Andritz AG
Original Assignee
Andritz AG
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 Andritz AG filed Critical Andritz AG
Publication of EP1287304A1 publication Critical patent/EP1287304A1/fr
Application granted granted Critical
Publication of EP1287304B1 publication Critical patent/EP1287304B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B1/00—Preliminary treatment of solid materials or objects to facilitate drying, e.g. mixing or backmixing the materials to be dried with predominantly dry solids
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B2200/00—Drying processes and machines for solid materials characterised by the specific requirements of the drying good
    • F26B2200/18—Sludges, e.g. sewage, waste, industrial processes, cooling towers

Definitions

  • the invention relates to a method for drying sludge, in particular Sewage sludge, with the production of granules from the drying material, in which a mixture of recycled, already dried sludge existing carrier material and wet sludge fed to a dryer be, the dry material after the dryer a solid separator is fed. Furthermore, the invention relates to a system for performing the Method according to the features of the preamble of claim 3.
  • Drum drying systems have been around for many years. Especially for the Drying sludge, especially sewage sludge, are such systems and procedures e.g. in EP 0 789 209 or US 5,318,184. Other systems of this type are in GB 1 378 489 A, EP 0 802 381 A, DE 23 60 235 A, EP 0 537 637 A and EP 0 590 909 A. This What is common is that a backmixing of carrier material already dried material for wet sludge to overcome the so-called Glue phase is provided.
  • the aim of the invention is therefore to provide a method and a system that are optimized in terms of safety, have high availability and a smaller one by reducing the number of system components Have space requirements and lower manufacturing costs.
  • the invention is therefore characterized in that the dry material in Solids separator or in a directly connected intermediate container is temporarily stored, the degree of filling in the separator or Intermediate container through an integrated conveyor unit, for example Screw conveyor, is regulated and that used as a carrier material Dry material is mixed with the wet sludge without further storage.
  • an integrated conveyor unit for example Screw conveyor
  • An advantageous embodiment of the invention is characterized in that the dry goods are temporarily stored in the inert area.
  • the invention also relates to a plant for carrying out the method.
  • a solid separator with a Storage volume or one directly connected to the solids separator separate storage container for the dry goods is provided in the Separator / separator or the storage container a discharge device, for example, a discharge screw conveyor, is integrated and between Discharge device and mixer provided at least one conveyor unit is the carrier material consisting of already dried sludge direct, i.e. without the interposition of other units or containers, from the solids separator to the mixer.
  • Solid matter separator is a filter, the solid matter separator also being a cyclone can be.
  • the system can thus be carried out more cost-effectively.
  • a favorable embodiment of the invention is characterized in that the conveyor unit alternatively a tube or shaft chain conveyor Elevator or a screw conveyor can be.
  • a tube chain conveyor offers that Possibility to return the dried goods to be returned in the Cycle and, if necessary, to cool while doing so, the product always stays in the inert area. With an elevator can be conveniently transport the dried sludge and carry out with a screw conveyor regulate the supply quantity particularly well.
  • An advantageous development of the invention is characterized in that at least one further conveyor unit, e.g. Tube chain conveyors, shaft chain conveyors, Elevator or screw conveyor between discharge device and mixer is provided.
  • at least one further conveyor unit e.g. Tube chain conveyors, shaft chain conveyors, Elevator or screw conveyor between discharge device and mixer is provided.
  • FIG. 1 shows a system according to the prior art
  • FIG. 2 shows a system according to the invention.
  • Fig. 1 shows a drying plant according to the prior art, with pre-dewatered Sludge 1 is fed to a container 2, from which it has a Feed screw 3, which is driven by a controllable motor 4, one Mixer 5 supplied and from there, for example, via a further mixing and Screw conveyor 5 'gets into the dryer 6.
  • a dryer 6 can next to the shown three-pass drum dryer also a soft layer, belt, fluidized bed or disc dryer can be used.
  • the dried good is through the drying air supplied to a separator 8 via a line 7 and via a cellular wheel sluice 10 to a screw conveyor 11 forwarded.
  • the fine solid particles that remain after the pre-separator 8 remaining in the air are separated in a subsequent filter 9 and also fed to the screw conveyor 11.
  • the screw conveyor is designed as a cooling screw to the permissible temperatures for the To be able to comply with storage in the carrier material silo 18.
  • the granular one Solid is further fed via a lock 12 to a screening plant 13, at the too large granules are fed to a crusher 14, and that Granules with the desired grain size via a line 15 to packaging and Transport devices is promoted.
  • a partial flow can also be selected of the desired grain size are fed to the crusher. That in the crusher 14 crushed material is mixed with the fine particles from the sieve 13 and via a screw conveyor 16 and a subsequent conveyor lift 17 a carrier material silo 18 supplied. From this the carrier material via a carrier material feed screw 19, which is controlled by a speed-controlled Motor 20 is driven, fed to the mixer 5.
  • the energy for the drying is generated according to FIG. 1 by a burner 21, which is its Gives heat to the circulating air in a heat exchanger 22.
  • the burner exhaust is by means of a fan 23 partially via a line 24 again Burner supplied or passed through a line 25 in the exhaust stack 26 and from there to the environment.
  • the one heated in the heat exchanger 22 Recirculated air is fed to dryer 6 via line 27.
  • it can Burner exhaust gas can also be fed directly to the dryer 6.
  • the promotion of Dry air is provided by a fan 28 arranged after the filter 9. This also ensures that in the area of the air system in which Material is conveyed, there is a negative pressure and therefore no dust on the Environment can be delivered.
  • the hot, moisture-laden air is fed to a washer / condenser 29 after the fan 28, at the cooling water is injected. Then the now cooled and dried air through a line 30 back to the heat exchanger 22 and thus reused. A partial flow of air is generated from the Washer 29 fed to the burner for combustion via a line 31.
  • Fig. 2 now shows a system according to the invention, with the same elements are also provided with the same reference numerals.
  • a system with direct supply of the burner exhaust gas into the dryer is shown, an indirect heating system (with heat exchanger) is also used can be.
  • the wet sludge 1 is also here after mixing with already dried sludge dried in a dryer 6.
  • one Separator 8 separates the dried material from the drying gas.
  • a storage part 32 of the separator 8 is shown, in which the dried, granular good is saved. Part of it is used as the end product a discharge screw 33 of the rotary valve 12 and supplied in another Followed via line 15 to packaging and transport devices.
  • the degree of filling in Container 32 regulated.
  • the dried one Good can also be stored directly in the separator / separator 8
  • the here Discharge screw 33 then regulates the degree of filling in the separator / separator 8.
  • the Dried material used as carrier material is e.g. through a Tube chain conveyor 34 conveyed directly to mixer 5 via a crusher 14 ', where it is mixed with fresh wet sludge from the wet sludge silo 2.
  • an additional cooler 35 can be provided here.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Treatment Of Sludge (AREA)
  • Drying Of Solid Materials (AREA)

Claims (9)

  1. Procédé de séchage de boues humides, surtout des boues d'épuration, produisant des granulés à partir du produit séché, où un mélange d'une matière de base, se composant des boues recyclées déjà séchées et des boues humides, est amené à un sécheur, le produit séché issu du sécheur est alimenté dans un séparateur de solides, caractérisé en ce que le produit séché est entreposé dans le séparateur de solides ou bien dans un conteneur intérimaire placé directement en aval, le niveau de remplissage dans le séparateur ou conteneur intérimaire est contrôlé par un convoyeur intégré, par exemple, une vis de convoyage, et la matière séchée est utilisée en tant que matière de base mélangée avec de la boue humide sans entreposage ultérieur.
  2. Procédé selon la revendication 1, caractérisé en ce que la matière séchée est entreposée en la zone inerté.
  3. Installation de séchage des boues humides, surtout des boues d'épuration, produisant des granulés à partir du produit séché, où un mélange d'une matière de base, se composant des boues recyclées déjà séchées et des boues humides, est amené à un sécheur, caractérisée en ce qu'un séparateur des solides (8) avec un volume de stockage (32) ou avec un conteneur de stockage séparé pour la matière séchée, directement connecté au séparateur de solides (8), est prévu en aval du sécheur (6), un dispositif de décharge (33), par exemple une vis de décharge, est intégré dans le séparateur (8) respectivement le containeur de stockage (32), et au moins un convoyeur (34) est prévu entre le dispositif de décharge (33) et le mélangeur (5) pour convoyer la matière de base consistant des boues préalablement séchées directement, i.e. sans unités intérimaires ou conteneurs, à partir du séparateur des solides (8) vers le mélangeur (5).
  4. Installation selon la revendication 3, caractérisée en ce que le séparateur des solides (8) est un filtre.
  5. Installation selon la revendication 3, caractérisée en ce que le séparateur des solides (8) est un cyclone.
  6. Installation selon la revendication 3, caractérisée en ce qu'au moins un des convoyeurs est un convoyeur à tube vibrant ou un convoyeur à chaíne cubique (34).
  7. Installation selon la revendication 3, caractérisée en ce que le (au moins un) convoyeur (34) est un élévateur.
  8. Installation selon la revendication 3, caractérisée en ce que le (au moins un) convoyeur (34) est un convoyeur à vis.
  9. Installation selon l'une des Revendications 6 à 8, caractérisée en ce qu'au au moins un autre convoyeur (34), p. ex. un convoyeur à tube vibrant ou un convoyeur à chaíne cubique, un élévateur ou une vis de convoyage, est prévu entre le dispositif de décharge et le mélangeur.
EP01945269A 2000-06-09 2001-06-07 Procede et dispositif de sechage de boues Expired - Lifetime EP1287304B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
AT0100200A AT408751B (de) 2000-06-09 2000-06-09 Verfahren und anlage zur trocknung von schlamm
AT10022000 2000-06-09
PCT/EP2001/006497 WO2001094866A1 (fr) 2000-06-09 2001-06-07 Procede et dispositif de sechage de boues

Publications (2)

Publication Number Publication Date
EP1287304A1 EP1287304A1 (fr) 2003-03-05
EP1287304B1 true EP1287304B1 (fr) 2004-12-15

Family

ID=3683945

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01945269A Expired - Lifetime EP1287304B1 (fr) 2000-06-09 2001-06-07 Procede et dispositif de sechage de boues

Country Status (7)

Country Link
US (1) US7261208B2 (fr)
EP (1) EP1287304B1 (fr)
AT (1) AT408751B (fr)
AU (1) AU2001267531A1 (fr)
DE (1) DE50104840D1 (fr)
NZ (1) NZ522955A (fr)
WO (1) WO2001094866A1 (fr)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9863705B2 (en) * 2003-03-06 2018-01-09 Vomm Chemipharma S.R.L. Process for drying finely divided organic substances capable of producing explosives reactions
ITMI20030417A1 (it) * 2003-03-06 2004-09-07 Vomm Chemipharma Srl Procedimento per l'essiccamento di sostanze organiche finemente suddivise suscettibili di causare reazioni esplosive.
EP1719963A3 (fr) * 2005-05-04 2009-03-18 Sahene Engineering v/Henning Rasmussen Dispositif de séchage en continu d'un gâteau de masse filtrante, de matières fibreuses, de pâte, de boues, ou de matières similaires.
AT503896B1 (de) * 2006-06-21 2008-10-15 Andritz Tech & Asset Man Gmbh Verfahren und anlage zur verarbeitung von feuchtgut
US8499471B2 (en) * 2008-08-20 2013-08-06 The Board Of Regents Of The Nevada System Of Higher Education, On Behalf Of The University Of Nevada, Reno System and method for energy production from sludge
CN106116099A (zh) * 2016-08-24 2016-11-16 叶青 一种污泥处理流水线设备
CN111138067A (zh) * 2019-12-30 2020-05-12 江苏绿威环保科技有限公司 干燥机余热回收系统
DE102020000818A1 (de) 2020-02-09 2021-08-12 Emschergenossenschaft Verwertung von ausgefaultem Klärschlamm in einer Wirbelschichtanlage
CN112010528A (zh) * 2020-09-13 2020-12-01 上海康恒环境股份有限公司 一种垃圾焚烧锅炉耦合污泥干化处置系统

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1378489A (en) * 1971-11-08 1974-12-27 Ames Crosta Mills & Co Ltd Sludge disposal
DE2360235A1 (de) * 1973-12-04 1975-10-23 Hoechst Ag Verfahren zur trocknung von abwasserschlamm
US3963471A (en) * 1974-06-19 1976-06-15 Hampton Quentin L Apparatus and process for producing an organic product from sewage sludge
US4860671A (en) * 1986-10-29 1989-08-29 Enviro-Gro Technologies, Inc. Odor control for a sludge treatment process
JP3160651B2 (ja) * 1991-10-14 2001-04-25 月島機械株式会社 含水汚泥の乾燥方法及び装置
US5318184A (en) 1992-09-10 1994-06-07 Georg Krebs Sludge drying system
GB9220428D0 (en) * 1992-09-28 1992-11-11 Barr Derek J Sludge treating process and apparatus
WO1994029229A1 (fr) * 1993-06-03 1994-12-22 Volume Reduction Systems, Inc. Preparation de matieres solides a ecoulement libre, a partir de dechets contenant de l'eau
US5535528A (en) * 1994-02-01 1996-07-16 By-Product Solutions, Inc. Agglomerating waste sludge and yard waste
AT402636B (de) 1995-09-27 1997-07-25 Andritz Patentverwaltung Verfahren zur trocknung von schlamm, verfahren zur trocknung von schlamm, insbesondere klärschlamm insbesondere klärschlamm
AT404015B (de) * 1996-04-17 1998-07-27 Andritz Patentverwaltung Verfahren zum trocknen von gut, insbesondere klärschlamm
AT405644B (de) * 1996-09-26 1999-10-25 Andritz Patentverwaltung Verfahren zum indirekt beheizten trocknen von gut, insbesondere von schlämmen
AT406671B (de) * 1996-11-22 2000-07-25 Andritz Patentverwaltung Verfahren zur trocknung von schlamm, insbesondere klärschlamm
US6058619A (en) * 1997-09-23 2000-05-09 Andritz-Patentverwaltungs-Gesellschaft M.B.H. Process and apparatus for drying material with indirectly heated driers and for decontaminating waste gas
AT406672B (de) * 1998-02-26 2000-07-25 Andritz Patentverwaltung Verfahren und anlage zur mechanischen und thermischen entwässerung von schlämmen

Also Published As

Publication number Publication date
AT408751B (de) 2002-03-25
EP1287304A1 (fr) 2003-03-05
US7261208B2 (en) 2007-08-28
US20040112796A1 (en) 2004-06-17
NZ522955A (en) 2005-10-28
ATA10022000A (de) 2001-07-15
DE50104840D1 (de) 2005-01-20
AU2001267531A1 (en) 2001-12-17
WO2001094866A1 (fr) 2001-12-13

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