EP1287304A1 - Procede et dispositif de sechage de boues - Google Patents

Procede et dispositif de sechage de boues

Info

Publication number
EP1287304A1
EP1287304A1 EP01945269A EP01945269A EP1287304A1 EP 1287304 A1 EP1287304 A1 EP 1287304A1 EP 01945269 A EP01945269 A EP 01945269A EP 01945269 A EP01945269 A EP 01945269A EP 1287304 A1 EP1287304 A1 EP 1287304A1
Authority
EP
European Patent Office
Prior art keywords
separator
sludge
conveyor
plant according
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.)
Granted
Application number
EP01945269A
Other languages
German (de)
English (en)
Other versions
EP1287304B1 (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

Links

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 process for drying sludge, in particular sewage sludge, to produce granules from the material to be dried, in which a mixture of a carrier material consisting of recycled, already dried sludge and wet sludge is fed to a dryer.
  • the invention further relates to a plant for carrying out the method.
  • Drum drying systems have been around for many years. Such systems and processes are particularly suitable for drying sludge, especially sewage sludge, e.g. in EP 0 789 209 or US 5,318,184. These systems have in common that a backmixing of carrier material from already dried material to the wet sludge is provided to overcome the so-called glue phase. For this purpose, a large part of the already dried material is fed into a carrier material silo by means of a number of conveying elements, from where it is added to the wet sludge according to various control parameters and mixed with it is then fed to the dryer. In order to be able to store the dried material in the silo, it has to be cooled using a special cooling device (e.g. cooling screw). Furthermore, special, expensive designs are required for the carrier material silo for safety reasons.
  • a special cooling device e.g. cooling screw
  • the aim of the invention is therefore to provide a method and a system which are optimized in terms of safety technology, have high availability and, by reducing the number of system components, also require less space and lower manufacturing costs.
  • the invention is therefore characterized in that the dry material is fed to a solids separator after the dryer and temporarily stored there or in a directly connected intermediate container, the dry material used as carrier material being able to be mixed with the wet sludge without further storage. As a result, the previously required carrier material silo and the cooling device can be dispensed with.
  • a favorable development of the invention is characterized in that the degree of filling in the separator / separator or intermediate container is regulated by an integrated conveying unit, for example a screw conveyor. This means that optimum addition to the wet sludge and optimum separation effect of the separator can always be achieved.
  • An advantageous embodiment of the invention is characterized in that the intermediate storage of the dry material takes place in the inert area.
  • the invention also relates to a plant for carrying out the method. This is characterized in that after the dryer a solid separator with a storage volume or a separate storage container directly connected to the solid separator is provided for the dry material. As a result, the previously required carrier material silo and the cooling screw can be dispensed with.
  • a favorable further development of the invention is characterized in that the solid separator is a filter, whereby the solid separator can also be a cyclone.
  • the system can thus be carried out more cost-effectively.
  • An advantageous embodiment of the invention is characterized in that a discharge device, for example a discharge screw conveyor, is integrated in the separator / separator or storage container. This means that optimum addition to the wet sludge and optimum separation effect of the separator can always be achieved.
  • a favorable embodiment of the invention is characterized in that at least one conveyor unit is provided between the discharge device and the mixer, which conveys the carrier material consisting of already dried sludge directly, ie without the interposition of other units or containers, from the solids separator to the mixer, this conveyor unit alternatively can be a tube or shaft chain conveyor, an elevator or a screw conveyor.
  • a tube chain conveyor offers the possibility to circulate the dried material to be returned when the system is switched off and, if necessary, to cool it, the product always being in the inert area remains.
  • the drying of the dried sludge can be carried out favorably with an elevator and the feed quantity can be regulated particularly well with a screw conveyor.
  • An advantageous development of the invention is characterized in that at least one further conveyor unit, e.g. Tube chain conveyor, shaft chain conveyor, elevator or screw conveyor is provided between the discharge device and the mixer.
  • at least one further conveyor unit e.g. Tube chain conveyor, shaft chain conveyor, elevator or screw conveyor is provided between the discharge device and the mixer.
  • FIG. 1 represents 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, wherein pre-dewatered sludge 1 is fed to a container 2, from which it is fed via a feed screw 3, which is driven by a controllable motor 4, to a mixer 5 and from there, for example, via another Mixing and conveying screw 5 'gets into the dryer 6.
  • a flexible layer, belt, fluidized bed or disc dryer can also be used as the dryer 6.
  • the dried material is fed to a separator 8 via the line 7 through the supplied drying air and passed on to a screw conveyor 11 via a cellular wheel sluice 10.
  • the fine solid particles which still remain in the air after the pre-separator 8, are separated in a subsequent filter 9 and are likewise fed to the screw conveyor 11.
  • the screw conveyor is designed as a cooling screw in order to be able to maintain the permissible temperatures for storage in the carrier material silo 18.
  • the granular solid is further fed via a lock 12 to a screening plant 13, in which oversized granules are fed to a crusher 14, and the granules with the desired grain size are conveyed via a line 15 to packaging and transport devices.
  • a partial flow of the desired grain size can be fed to the crusher.
  • That in the crusher 14 shredded material is mixed with the very fine particles from the sieve 13 and fed to a carrier material silo 18 via a screw conveyor 16 and a subsequent conveyor lift 17. From this, the carrier material is fed to the mixer 5 via a carrier material feed screw 19, which is driven by a speed-controlled motor 20.
  • the energy for drying is generated according to FIG. 1 by a burner 21, which emits its heat in a heat exchanger 22 to the ambient air.
  • the burner exhaust gas is fed back to the burner by means of a fan 23, in part via a line 24, or fed into the exhaust gas chimney 26 via a line 25 and released from there to the environment.
  • the circulating air heated in the heat exchanger 22 is fed to the dryer 6 via the line 27.
  • the burner exhaust gas can also be fed directly to the dryer 6.
  • the drying air is conveyed by a fan 28 arranged after the filter 9. This also ensures that there is a negative pressure in the area of the air system in which material is conveyed, and therefore no dust can be released into the environment.
  • the hot, moisture-laden air is fed after the fan 28 to a washer / condenser 29, in which cooling water is injected.
  • the now cooled and dried air is then returned to the heat exchanger 22 via a line 30 and thus reused.
  • a partial flow of the air is fed from the scrubber 29 to the burner for combustion via a line 31.
  • FIG. 2 now shows a system according to the invention, the same elements also being provided with the same reference numerals.
  • a system with a direct supply of the burner exhaust gas into the dryer is shown, it also being possible to use an indirect heating system (with a heat exchanger).
  • the wet sludge 1 is also dried in a dryer 6 after mixing with already dried sludge.
  • the dried material is separated from the drying gas in a separator 8.
  • a storage part 32 of the separator 8 is shown here, in which the dried, granulated material is stored. A part of this is fed to the cellular wheel sluice 12 as the end product by means of a discharge screw 33 and subsequently conveyed via line 15 to packaging and transport devices.
  • the degree of filling in Container 32 regulated.
  • the dried material can also be stored directly in the separator / separator 8, in which case the discharge screw 33 then regulates the degree of filling in the separator / separator 8.
  • the dried material used as the carrier material is conveyed, for example, by a tube chain conveyor 34 via a crusher 14 'directly to the mixer 5, where it is mixed with fresh wet sludge from the wet sludge silo 2.
  • an additional cooler 35 is provided here.

Landscapes

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

Abstract

L'invention concerne un procédé de séchage de boues, en particulier de boues de curage, par production de granulat à partir de la matière de séchage. Ledit procédé consiste à alimenter un mélange de matériau porteur constitué de boues séchées recyclées, et de boues humides, dans un dispositif de séchage (6). Ledit procédé est notamment caractérisé en ce que la matière séchée est alimentée dans un décanteur de matière solide (8) après alimentation dans le dispositif de séchage (6), et en ce que la matière séchée est stockée de manière intermédiaire dans ledit décanteur ou dans un contenant intermédiaire directement placé en aval. L'invention concerne également un dispositif destiné à la mise en oeuvre dudit procédé.
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
AT10022000 2000-06-09
AT0100200A AT408751B (de) 2000-06-09 2000-06-09 Verfahren und anlage zur trocknung von schlamm
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 true EP1287304A1 (fr) 2003-03-05
EP1287304B1 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)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1719963A2 (fr) * 2005-05-04 2006-11-08 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.
DE102020000818A1 (de) 2020-02-09 2021-08-12 Emschergenossenschaft Verwertung von ausgefaultem Klärschlamm in einer Wirbelschichtanlage

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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.
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
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
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
CN113577818B (zh) * 2021-09-02 2024-10-15 河南多赛环保设备有限公司 一种液体干燥设备

Family Cites Families (15)

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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

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO0194866A1 *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1719963A2 (fr) * 2005-05-04 2006-11-08 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.
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.
DE102020000818A1 (de) 2020-02-09 2021-08-12 Emschergenossenschaft Verwertung von ausgefaultem Klärschlamm in einer Wirbelschichtanlage

Also Published As

Publication number Publication date
AU2001267531A1 (en) 2001-12-17
WO2001094866A1 (fr) 2001-12-13
EP1287304B1 (fr) 2004-12-15
US20040112796A1 (en) 2004-06-17
AT408751B (de) 2002-03-25
NZ522955A (en) 2005-10-28
ATA10022000A (de) 2001-07-15
US7261208B2 (en) 2007-08-28
DE50104840D1 (de) 2005-01-20

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