EP1236015B1 - Batch sludge dehydrator - Google Patents

Batch sludge dehydrator Download PDF

Info

Publication number
EP1236015B1
EP1236015B1 EP99951769A EP99951769A EP1236015B1 EP 1236015 B1 EP1236015 B1 EP 1236015B1 EP 99951769 A EP99951769 A EP 99951769A EP 99951769 A EP99951769 A EP 99951769A EP 1236015 B1 EP1236015 B1 EP 1236015B1
Authority
EP
European Patent Office
Prior art keywords
agitator
shaft
chamber
thermal fluid
disc
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
EP99951769A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1236015A1 (en
Inventor
Danny R. Bolton
David L. Bigham
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.)
Rubicon Development Co LLC
Original Assignee
Rubicon Development Co LLC
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 Rubicon Development Co LLC filed Critical Rubicon Development Co LLC
Publication of EP1236015A1 publication Critical patent/EP1236015A1/en
Application granted granted Critical
Publication of EP1236015B1 publication Critical patent/EP1236015B1/en
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
    • F26B17/00—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement
    • F26B17/28—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement with movement performed by rollers or discs with material passing over or between them, e.g. suction drum, sieve, the axis of rotation being in fixed position
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B11/00—Machines or apparatus for drying solid materials or objects with movement which is non-progressive
    • F26B11/12—Machines or apparatus for drying solid materials or objects with movement which is non-progressive in stationary drums or other mainly-closed receptacles with moving stirring devices
    • F26B11/16—Machines or apparatus for drying solid materials or objects with movement which is non-progressive in stationary drums or other mainly-closed receptacles with moving stirring devices the stirring device moving in a vertical or steeply-inclined plane
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B17/00—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement
    • F26B17/18—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement with movement performed by rotating helical blades or other rotary conveyors which may be heated moving materials in stationary chambers, e.g. troughs
    • F26B17/20—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement with movement performed by rotating helical blades or other rotary conveyors which may be heated moving materials in stationary chambers, e.g. troughs the axis of rotation being horizontal or slightly inclined
    • 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
    • F26B25/04—Agitating, stirring, or scraping devices
    • 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 sludge dehydrator of the present invention incorporates a system using indirect heat and a batch mode to obtain substantially improved performance in sludge dehydration.
  • a rotatably-mounted agitator 26 is adapted to agitate material in the inner cavity 14 when the agitator 26 rotates in a first direction and convey the material out of the inner cavity 14 when the agitator rotates in the other, second direction.
  • first direction is illustrated by arrow 28, and the other, second direction is illustrated by arrow 30.
  • the agitator 26 is mounted for rotation about the central axis 16 of the chamber 12.
  • the agitator 26 includes a tubular shaft 32 along the central axis 16 adapted to receive heated thermal fluid at a first end 34 thereof and return thermal fluid at the other, second end 36 thereof ( Figures 3,4).
  • a plurality of transverse discs 38 are fixed at substantially equally-spaced locations along the shaft 32.
  • the discs have substantially equal dimensions, with disc outer diameter dimensions "D 1 " begin substantially less than an inner diameter dimension "D 2 " of the inner cavity 14.
  • Substantial annular gaps 40 between the discs 38 and the inner chamber wall 22 are provided.
  • the rotating agitator 26 inside of the dehydration chamber is fabricated from a series of hollow discs 38 welded to a common shaft 32. These hollow discs 38 have a 40 degree wedge-shaped sector 60 cut out of them to allow the wet material being dehydrated to level out over the entire length of the chamber and to let the dry material pass between the discs when it is being discharged.
  • the agitator 26 is supported by the shaft 32 extending through bearings mounted at both ends of the dehydration chamber.
  • Thermal fluid rotary unions 118 are located at either end of the shaft 32 to allow the fluid to enter the rotating shaft. All of the discs 38 are connected by wiper tubes 50 which allow for the passage of thermal fluid from one disc 38 to the next.
  • the material storage/feed hopper 100 has a rotating wiper mechanism 124 that maintains a constant feed of material to a screw auger 126 positioned in the bottom.
  • the screw auger 126 conveys the material from the hopper 100 to the dehydration chamber 12 through a feed tube 128 attached to the sludge inlet port 108.
  • Wet Scrubber/Condenser 102 The vapors from the dehydrator 12 exit the dehydrator through a ducting 134 that has numerous water spray nozzles 136 positioned in it. This water spray helps to cool the gas stream and collect the particulate that is emitted from the dehydrator exhaust port 112 prior to entering the venturi scrubber/cyclone 138 where a higher efficiency scrubbing/cooling effect occur.
  • the material to be dried is placed into the material storage/feed hopper.
  • An automatic slide gate is located inside of the dehydration chamber at the opening of the material inlet port which opens when the unit is being filled and closes when the unit is in the dehydration or discharge mode.
  • the hopper will fill the dehydration chamber to the correct level based upon a predetermined time interval.
  • the dehydration process begins with agitator rotation in the correct direction and the heated fluid being pumped through the dehydration chamber and agitator.
  • the thermal fluid is maintained at a higher temperature.
  • the temperature of the oil is reduced to keep it from reaching the ignition point. This prevents the scorching, or burning of the material.
  • the flat sides of wiper tubes are working toward the material.
  • the material is agitated, lifted and churned continuously, exposing it to as much of the heated surface area of the agitator tubes, discs and cylinder walls as possible.
  • the angled conveyor bars move the material toward, and through, the discharge port opening and deposits it in the dry material conveyor.
  • the dry material is sent from the conveyor to a receptacle, or bag.
  • the system automatically closes the discharge port door and refills with wet material to begin the next dehydration cycle. Since the system is sealed, the exhaust from the dehydrator is virtually a pure vapor.
  • the air scrubber/condenser is designed to remove the particulate which may be entrained in the exhaust stream and condense as much of the vapor as possible back to a liquid.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Treatment Of Sludge (AREA)
  • Drying Of Solid Materials (AREA)
  • Accessories For Mixers (AREA)
  • Mixers Of The Rotary Stirring Type (AREA)
EP99951769A 1999-10-05 1999-10-05 Batch sludge dehydrator Expired - Lifetime EP1236015B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/US1999/023112 WO2001025709A1 (en) 1999-10-05 1999-10-05 Batch sludge dehydrator

Publications (2)

Publication Number Publication Date
EP1236015A1 EP1236015A1 (en) 2002-09-04
EP1236015B1 true EP1236015B1 (en) 2005-01-12

Family

ID=22273743

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99951769A Expired - Lifetime EP1236015B1 (en) 1999-10-05 1999-10-05 Batch sludge dehydrator

Country Status (13)

Country Link
EP (1) EP1236015B1 (ja)
JP (1) JP3909822B2 (ja)
KR (1) KR100473447B1 (ja)
AT (1) ATE287073T1 (ja)
AU (1) AU766575B2 (ja)
BR (1) BR9917506A (ja)
CA (1) CA2386610C (ja)
DE (1) DE69923239T2 (ja)
ES (1) ES2237169T3 (ja)
IL (1) IL148947A (ja)
MX (1) MXPA02003564A (ja)
NZ (1) NZ517989A (ja)
WO (1) WO2001025709A1 (ja)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108981326A (zh) * 2018-10-16 2018-12-11 南京农业大学 一种热泵式真空干燥机

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009010393A1 (de) * 2008-09-29 2010-04-01 List Holding Ag Torrefaktor
KR102093874B1 (ko) * 2019-01-08 2020-03-26 김재걸 수평원통회전형 건조장치
DE102019114060A1 (de) * 2019-05-27 2020-12-03 Hubert Kohler Reaktor zur erzeugung von wasserdampf und trockensubstanz, gaserzeugungsvorrichtung und verfahren zur dampf und gaserzeugung
US20230013608A1 (en) * 2019-12-09 2023-01-19 Hellenes Holding As Apparatus for continuous thermal separation of a multi-component substance
CN114929356A (zh) * 2019-12-09 2022-08-19 赫伦斯控股有限公司 用于对多成分物质进行连续热分离的方法
NL2025396B1 (en) * 2020-04-22 2021-10-28 Hosokawa Micron B V Processing device for processing one or more flowable materials

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH265601A (de) * 1948-01-16 1949-12-15 Vevey Atel Const Mec Apparat zum Trocknen von Schlachtabfällen, Kadavern, Fischen usw. mit auch beim Entleeren verwendbarem Rührwerk.
GB789439A (en) * 1956-10-16 1958-01-22 Stord Marin Ind As Steam heated drying apparatus for drying moist materials
NO122742B (ja) * 1970-05-16 1971-08-02 Stord Bartz Industri As
BE880930A (nl) * 1979-12-28 1980-06-30 Vandekerckhove Constr Inwendig verwarmd roerwerk
DK155468C (da) * 1984-10-04 1989-08-14 Atlas As Toerreapparat omfattende et stationaert hus og en rotor med et antal ringformede toerrelegemer
GB8517798D0 (en) * 1985-07-15 1985-08-21 Din Eng Ltd Reaction chamber conveyor
JPS62172179A (ja) * 1986-01-25 1987-07-29 株式会社クボタ ら旋搬送式乾燥機
DE8706191U1 (de) * 1987-04-29 1987-06-19 Wichmann, Hans, Prof. Dipl.-Ing., 1000 Berlin Trockner für zähfließende, wenigstens teilhomogenisierte Massen
US5566469A (en) 1995-07-18 1996-10-22 Fen-Tech Environmental, Inc. Drying apparatus with rotatable housing

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108981326A (zh) * 2018-10-16 2018-12-11 南京农业大学 一种热泵式真空干燥机

Also Published As

Publication number Publication date
KR100473447B1 (ko) 2005-03-09
AU766575B2 (en) 2003-10-16
MXPA02003564A (es) 2003-07-21
ATE287073T1 (de) 2005-01-15
ES2237169T3 (es) 2005-07-16
WO2001025709A1 (en) 2001-04-12
DE69923239T2 (de) 2005-12-29
BR9917506A (pt) 2002-08-13
NZ517989A (en) 2003-01-31
KR20020060191A (ko) 2002-07-16
IL148947A0 (en) 2002-11-10
CA2386610A1 (en) 2001-04-12
JP2003519768A (ja) 2003-06-24
AU6413699A (en) 2001-05-10
DE69923239D1 (de) 2005-02-17
IL148947A (en) 2005-06-19
JP3909822B2 (ja) 2007-04-25
CA2386610C (en) 2005-12-06
EP1236015A1 (en) 2002-09-04

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