EP0844452A1 - Verfahren zur Trocknung von Schlamm, insbesondere Klärschlamm - Google Patents
Verfahren zur Trocknung von Schlamm, insbesondere Klärschlamm Download PDFInfo
- Publication number
- EP0844452A1 EP0844452A1 EP97119189A EP97119189A EP0844452A1 EP 0844452 A1 EP0844452 A1 EP 0844452A1 EP 97119189 A EP97119189 A EP 97119189A EP 97119189 A EP97119189 A EP 97119189A EP 0844452 A1 EP0844452 A1 EP 0844452A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- dryer
- air
- sludge
- amount
- drying
- 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.)
- Withdrawn
Links
Images
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
- F26B25/00—Details of general application not covered by group F26B21/00 or F26B23/00
- F26B25/001—Handling, e.g. loading or unloading arrangements
- F26B25/002—Handling, e.g. loading or unloading arrangements for bulk goods
Definitions
- the invention relates to a process for drying sludge, in particular sewage sludge, where a mixture of a carrier material and moist material fed to a dryer and hot gas or air are passed over it.
- Such methods are e.g. known from WO 93/24800 or US 5,069,801. These known methods are commonly used in response to fluctuating Dry matter content of the wet sludge is the burner temperature or dryer inlet temperature regulated accordingly. However, this means that when drier material the temperature must be lowered, resulting in a reduction of drying performance. If more moist sludge is added, the dryer inlet temperature must be can be increased, quickly reaching the limits of the burner and sufficient drying only by reducing the throughput can be achieved, which usually has to be done by hand.
- the aim of the invention is therefore to provide a method in which the operating conditions of the dryer are kept constant.
- the supply amount of the moist material (Wet sludge) depending on the inlet temperature of the hot gas or hot air in the dryer is regulated.
- the Dryers can be operated with optimal parameters.
- the fluctuations in The dry matter content of the amount of wet sludge supplied is essentially determined by compensated for a change in quantity.
- the dryer inlet temperature changes when the wet sludge quality changes immediate system response.
- the total evaporation capacity remains of the dryer constant.
- a further development of the invention is characterized in that the amount of carrier material is regulated depending on the dryer inlet temperature. Thereby can conveniently adapt the system to a desired heating output of the dryer.
- An advantageous embodiment of the invention is characterized in that the Regulation of the supply amount of the wet sludge by regulating the speed of the Dosing device, especially the feed screw, takes place. This can make it easier and cost-effective way of a well-functioning adjustment of the supply amount respectively.
- a favorable development of the invention is characterized in that the Regulation of the amount of carrier material by regulation of the speed of the metering device, in particular the carrier material feed screw.
- the adjustment of the amount of carrier material to the dryer conditions in simple and perform it inexpensively.
- Another advantageous embodiment of the invention is characterized in that the burner exhaust air as hot air for drying, possibly mixed with circulating air, is used.
- Hot air for drying uses the circulating air heated in a heat exchanger the recirculated air can be heated by burner exhaust air or thermal oil.
- An advantageous embodiment of the invention is characterized in that as Dryer a drum dryer, fluid bed or disc dryer is used.
- Fig. represents a variant of the sludge drying system according to the invention.
- Pre-dewatered sludge 1 is fed to a container 2, from which it passes through a Feed screw 3, which is driven by a controllable motor 4, one Mixer 5 fed and from there via a further mixing and conveying screw 5 'in reaches the dryer 6.
- the dryer 6 can be used instead of the three-pass drum dryer shown a fluid bed or disc dryer can also be used.
- the dried material is through the drying air via a line 7 to a separator or cyclone 8 and fed via a rotary valve 10 to one Screw conveyor 11 forwarded.
- the fine solid particles that remain after the Cyclones 8 remaining in the air are separated in a subsequent filter 9 and also fed to the screw conveyor 11.
- the granular solid is further fed via a lock 12 to a screening plant 13, in which large granules are fed to a crusher 14, and the granules with the desired grain size via a line 15 to packaging and transport devices is promoted.
- a partial stream of the desired Grain can be fed to the crusher.
- the material crushed in the crusher 14 is mixed with the finest particles from the sieve 13 and via a screw conveyor 16 and a subsequent conveyor lift 17 fed to a carrier material silo 18. From this the carrier material is fed via a carrier material feed screw 19, which is driven by a speed-controlled motor 20, the Mixer 5 supplied.
- the energy for drying is generated by a burner 21. Combustion air 22 and gas 23 are supplied to burner 21 for combustion.
- the circulating air 24 is fed to the burner 21, where it is used as a heat supplier serves and on the other hand the odorous substances are burned, so that none Odors are released to the environment. That mixed with the circulating air Burner exhaust gas is fed to dryer 6 via line 25.
- the promotion of Dry air is provided by a fan 26 arranged after the filter 9. This also ensures that in the area of the air system, in the material is promoted, a negative pressure prevails and therefore no dust is released into the environment can be.
- the hot, moisture-laden air is released after the Fan 26 is fed to a washer / condenser 27, in which cooling water 28 is injected. Then the cooled and dried air is over Line 24 is fed back to the burner 21 and thus reused.
- a Partial stream 29 of the air is released from the scrubber 27 into the atmosphere.
- the dryer inlet temperature in line 25 is via a temperature sensor 30 measured and the burner outlet temperature in line 7 by means of a temperature sensor 31.
- the signal from the temperature sensor 31 is used to supply the fuel by means of a valve 32 and the combustion air supply to the combustion air fan 33 to be regulated by means of a flap 34.
- Gas can be used as fuel or oil can be used.
- a corresponding outlet temperature predefined for the dryer This allows constant conditions for the granules produced are observed. If the amount of wet sludge to dry is low and by reducing the drying temperature at Burners save energy on the one hand and reduce emissions On the other hand, the emissions can be achieved, the evaporation performance the dryer by lowering the dryer inlet temperature. At Such a change in the dryer inlet temperature is detected by the temperature sensor 30 a signal is given to the motor 20 of the carrier material feed screw 19, the amount of carrier material at lower dryer inlet temperature is reduced. This reduces the dryness of the dryer fed mixture of wet sludge and carrier material and there will only be one lower evaporation power required. Through the previously described regulation this also reduces the amount of sludge 1 supplied, which in turn the mixture fed to the dryer has a constant dry content. Overall, the total throughput through the dryer is reduced in this way.
- thermal oil is also used instead of the burner to heat the circulating air be or another circuit of the circuit or other system components to be carried out.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Drying Of Solid Materials (AREA)
- Treatment Of Sludge (AREA)
Abstract
Description
Claims (9)
- Verfahren zur Trocknung von Schlamm, insbesondere Klärschlamm, bei dem eine Mischung aus einem Trägermaterial und feuchtem Gut einem Trockner zugeführt und Heißgas bzw. -luft darüber geleitet wird, dadurch gekennzeichnet, daß die Zufuhrmenge des feuchten Gutes (Naßschlamm) in Abhängigkeit von der Eintrittstemperatur des Heißgases bzw. der heißen Luft in den Trockner geregelt wird.
- Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß die Trägermaterialmenge in Abhängigkeit der Trocknereintrittstemperatur geregelt wird.
- Verfahren nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die Regelung der Zufuhrmenge des Naßschlammes durch Regelung der Drehzahl der Dosiervorrichtung, insbesondere der Zufuhrschnecke, erfolgt.
- Verfahren nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß die Regelung der Trägermaterialmenge durch Regelung der Drehzahl der Dosiervorrichtung, insbesondere der Trägermaterialzufuhrschnecke, erfolgt.
- Verfahren nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß als Heißluft für die Trocknung die Brennerabluft, gegebenenfalls vermischt mit Umluft, verwendet wird.
- Verfahren nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß als Heißluft für die Trocknung die in einem Wärmetauscher erhitzte Umluft verwendet wird.
- Verfahren nach Anspruch 6, dadurch gekennzeichnet, daß die Umluft durch Brennerabluft erhitzt wird.
- Verfahren nach Anspruch 6, dadurch gekennzeichnet, daß die Umluft durch Thermoöl erhitzt wird.
- Verfahren nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, daß als Trockner ein Trommeltrockner, Fließbett- oder Scheibentrockner eingesetzt wird.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT0203396A AT406671B (de) | 1996-11-22 | 1996-11-22 | Verfahren zur trocknung von schlamm, insbesondere klärschlamm |
| AT2033/96 | 1996-11-22 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP0844452A1 true EP0844452A1 (de) | 1998-05-27 |
Family
ID=3526364
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP97119189A Withdrawn EP0844452A1 (de) | 1996-11-22 | 1997-11-03 | Verfahren zur Trocknung von Schlamm, insbesondere Klärschlamm |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US6006440A (de) |
| EP (1) | EP0844452A1 (de) |
| AT (1) | AT406671B (de) |
| HU (1) | HUP9702170A3 (de) |
Families Citing this family (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AT408751B (de) * | 2000-06-09 | 2002-03-25 | Andritz Ag Maschf | Verfahren und anlage zur trocknung von schlamm |
| US7024800B2 (en) | 2004-07-19 | 2006-04-11 | Earthrenew, Inc. | Process and system for drying and heat treating materials |
| US7024796B2 (en) | 2004-07-19 | 2006-04-11 | Earthrenew, Inc. | Process and apparatus for manufacture of fertilizer products from manure and sewage |
| US7685737B2 (en) | 2004-07-19 | 2010-03-30 | Earthrenew, Inc. | Process and system for drying and heat treating materials |
| US7694523B2 (en) | 2004-07-19 | 2010-04-13 | Earthrenew, Inc. | Control system for gas turbine in material treatment unit |
| NZ541426A (en) | 2005-07-25 | 2008-06-30 | Flo Dry Engineering Ltd | Method and apparatus for drying |
| US7610692B2 (en) | 2006-01-18 | 2009-11-03 | Earthrenew, Inc. | Systems for prevention of HAP emissions and for efficient drying/dehydration processes |
| US7669348B2 (en) * | 2006-10-10 | 2010-03-02 | Rdp Company | Apparatus, method and system for treating sewage sludge |
| US20090199748A1 (en) * | 2007-02-02 | 2009-08-13 | Infilco Degremont, Inc. A Corporation Of New York | Apparatus and methods for incinerating sludge in a combustor |
| CN103109147B (zh) * | 2010-04-22 | 2016-05-04 | 株式会社佐竹 | 谷物干燥设备 |
| US9255187B2 (en) * | 2013-03-15 | 2016-02-09 | Synergy Horizon Limited | Method for production of dry hydrolytic lignin |
| RU2622218C1 (ru) * | 2016-04-11 | 2017-06-13 | Федеральное государственное бюджетное научное учреждение Всероссийский научно-исследовательский институт механизации животноводства, ФГБНУ ВНИИМЖ | Агрегат для производства высоковитаминной травяной муки |
| US10845120B1 (en) * | 2018-03-01 | 2020-11-24 | Steve Macchio | Systems and methods for environmentally-clean thermal drying |
| NL2023895B1 (en) * | 2019-09-25 | 2021-05-25 | Tanis Confectionery B V | method and system for drying a moulding powder used in a confectionery moulding process |
| CN116177841A (zh) * | 2023-02-03 | 2023-05-30 | 辽宁大唐国际锦州热电有限责任公司 | 一种旋翼干化一体机干化焚烧系统及方法 |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5069801A (en) | 1990-02-26 | 1991-12-03 | Bio Gro Systems, Incorporated | Indirect heat drying and simultaneous pelletization of sludge |
| WO1993024800A1 (en) | 1992-05-22 | 1993-12-09 | Andritz Tcw Engineering Gmbh | Sludge drying system with recycling exhaust air |
| US5279637A (en) * | 1990-10-23 | 1994-01-18 | Pcl Environmental Inc. | Sludge treatment system |
| US5318184A (en) * | 1992-09-10 | 1994-06-07 | Georg Krebs | Sludge drying system |
| DE4242747A1 (de) * | 1992-12-17 | 1994-06-23 | Steag Ag | Verfahren und Anlage zum Behandeln von Schlamm |
| DE19531101C1 (de) * | 1995-08-24 | 1997-01-02 | Walther & Cie Ag | Verfahren zur Regelung einer Schlammtrocknungsanlage mit Rückführung |
| EP0789209A2 (de) * | 1995-09-27 | 1997-08-13 | Andritz-Patentverwaltungs-Gesellschaft m.b.H. | Verfahren zur Trocknung von Schlamm, insbesondere Klärschlamm |
| EP0802381A2 (de) * | 1996-04-17 | 1997-10-22 | Andritz-Patentverwaltungs-Gesellschaft m.b.H. | Verfahren zum Trocknen von Gut, insbesondere Klärschlamm |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4310973A (en) * | 1977-12-01 | 1982-01-19 | Phillips Petroleum Co. | Drying polymer solutions |
| US4696115A (en) * | 1986-07-22 | 1987-09-29 | Nabisco Brands, Inc. | Method and apparatus for drying wet particulate material to a predetermined uniform moisture content |
| US4829678A (en) * | 1986-10-29 | 1989-05-16 | Enviro Gro Technologies | Sludge treatment process |
| DE3902446C1 (de) * | 1989-01-27 | 1990-07-05 | Sulzer-Escher Wyss Gmbh, 7980 Ravensburg, De | |
| US4974777A (en) * | 1989-09-25 | 1990-12-04 | Texaco Inc. | Means and methods for controlling the drying of wet gas |
| US5557873A (en) * | 1990-10-23 | 1996-09-24 | Pcl/Smi, A Joint Venture | Method of treating sludge containing fibrous material |
| US5245762A (en) * | 1992-08-24 | 1993-09-21 | Hartis Dennis R | Sludge drying apparatus and method |
| GB9220428D0 (en) * | 1992-09-28 | 1992-11-11 | Barr Derek J | Sludge treating process and apparatus |
| DE4321994A1 (de) * | 1993-07-01 | 1995-01-12 | Nalco Chemical Co | Verfahren zum Steuern von Mengen chemischer Hilfs- und Flockmittel in Abhängigkeit einer on-line Massen-Feststoffmessung für Klär- und Ent-Wässerungsprozesse aller Art, sowie Anlage zur Durchführung des Verfahrens |
| GB9411444D0 (en) * | 1994-06-08 | 1994-07-27 | Cdm Ab | Dewatering of suspensions |
-
1996
- 1996-11-22 AT AT0203396A patent/AT406671B/de not_active IP Right Cessation
-
1997
- 1997-11-03 EP EP97119189A patent/EP0844452A1/de not_active Withdrawn
- 1997-11-19 US US08/974,153 patent/US6006440A/en not_active Expired - Fee Related
- 1997-11-20 HU HU9702170A patent/HUP9702170A3/hu unknown
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5069801A (en) | 1990-02-26 | 1991-12-03 | Bio Gro Systems, Incorporated | Indirect heat drying and simultaneous pelletization of sludge |
| US5279637A (en) * | 1990-10-23 | 1994-01-18 | Pcl Environmental Inc. | Sludge treatment system |
| WO1993024800A1 (en) | 1992-05-22 | 1993-12-09 | Andritz Tcw Engineering Gmbh | Sludge drying system with recycling exhaust air |
| US5318184A (en) * | 1992-09-10 | 1994-06-07 | Georg Krebs | Sludge drying system |
| DE4242747A1 (de) * | 1992-12-17 | 1994-06-23 | Steag Ag | Verfahren und Anlage zum Behandeln von Schlamm |
| DE19531101C1 (de) * | 1995-08-24 | 1997-01-02 | Walther & Cie Ag | Verfahren zur Regelung einer Schlammtrocknungsanlage mit Rückführung |
| EP0789209A2 (de) * | 1995-09-27 | 1997-08-13 | Andritz-Patentverwaltungs-Gesellschaft m.b.H. | Verfahren zur Trocknung von Schlamm, insbesondere Klärschlamm |
| EP0802381A2 (de) * | 1996-04-17 | 1997-10-22 | Andritz-Patentverwaltungs-Gesellschaft m.b.H. | Verfahren zum Trocknen von Gut, insbesondere Klärschlamm |
Also Published As
| Publication number | Publication date |
|---|---|
| US6006440A (en) | 1999-12-28 |
| HU9702170D0 (en) | 1998-01-28 |
| HUP9702170A3 (en) | 1998-08-28 |
| AT406671B (de) | 2000-07-25 |
| HUP9702170A2 (hu) | 1998-06-29 |
| ATA203396A (de) | 1999-12-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP0844452A1 (de) | Verfahren zur Trocknung von Schlamm, insbesondere Klärschlamm | |
| EP0457203B1 (de) | Verfahren zum emissionsfreien Trocknen einer Substanz in einer Trocknungstrommel | |
| USRE35251E (en) | Sewage sludge treatment system | |
| EP0789209B1 (de) | Verfahren zur Trocknung von Schlamm, insbesondere Klärschlamm | |
| CH641133A5 (de) | Verfahren zum verarbeiten von klaerschlamm. | |
| AT406901B (de) | Verfahren und vorrichtung zur verbrennung von partikelförmigen feststoffen | |
| EP0423400B1 (de) | Entsorgungseinrichtung | |
| US5611935A (en) | Method and device for treating sludge | |
| EP0379657A1 (de) | Verfahren zur Trocknung eines Schlammes | |
| DE2330127A1 (de) | Verfahren zum trocknen und anschliessenden verbrennen von schlamm, sowie anlage zur ausfuehrung des verfahrens | |
| WO2011018409A1 (de) | Verfahren und anlage zur abscheidung von quecksilber aus abgasen eines zementherstellungsprozesses | |
| DE3047060C2 (de) | Verfahren und Vorrichtung zum Trocknen und Verbrennen von Schlamm | |
| AT408751B (de) | Verfahren und anlage zur trocknung von schlamm | |
| EP1319632A1 (de) | Verfahren und Vorrichtung zur Trocknung von Schlamm, insbesondere von Abwasserschlamm | |
| EP0883778A1 (de) | Verfahren zur verbrennung von klärschlamm und anlage zur durchführung des verfahrens | |
| EP3351885A1 (de) | Verfahren zum betrieb einer trocknungsanlage für feuchtes holz und trocknungsanlage | |
| DE102007053212A1 (de) | Verfahren und Trocknungsanlage eines Feststoffanteils aus der Fest-Flüssig-Trennung einer biologisches Material enthaltenden Dispersion | |
| DE102008004400B4 (de) | Verfahren und Anordnung zur Dosierung von Kohlenstaub in eine Feuerungseinrichtung | |
| DE69222135T2 (de) | Verfahren und Anlage zur Herstellung eines Brennstoffs durch Trocknung einer Mischung von Klärschlamm und entflammbares Produkt | |
| DE2851005A1 (de) | Verfahren und vorrichtung zum trocknen von schlamm | |
| DE10224173A1 (de) | Verfahren und Vorrichtung zur Sterilisation und Nachtrocknung von Produkten nach einer Kurzzeittrocknung | |
| DE4407536A1 (de) | Verfahren und Vorrichtung zur Vermeidung von Brandgefahren bei der Entfeuchtung von Schlämmen | |
| JPS60900A (ja) | 泥状物の乾燥方法 | |
| EP0829457A2 (de) | Verfahren und Einrichtung zum Trocknen von Schlämmen | |
| EP0526458B1 (de) | Verfahren und anlage zum verwerten von klärschlamm |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
| AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): CH DE FR GB IT LI |
|
| AX | Request for extension of the european patent |
Free format text: AL;LT;LV;MK;RO;SI |
|
| 17P | Request for examination filed |
Effective date: 19981030 |
|
| AKX | Designation fees paid |
Free format text: CH DE FR GB IT LI |
|
| RBV | Designated contracting states (corrected) |
Designated state(s): CH DE FR GB IT LI |
|
| 17Q | First examination report despatched |
Effective date: 20000508 |
|
| RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: ANDRITZ AG |
|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
|
| 18D | Application deemed to be withdrawn |
Effective date: 20010301 |