EP0015357A1 - Vorrichtung zum Trocknen von Mist und ähnlichem Restgut - Google Patents

Vorrichtung zum Trocknen von Mist und ähnlichem Restgut Download PDF

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Publication number
EP0015357A1
EP0015357A1 EP19790850014 EP79850014A EP0015357A1 EP 0015357 A1 EP0015357 A1 EP 0015357A1 EP 19790850014 EP19790850014 EP 19790850014 EP 79850014 A EP79850014 A EP 79850014A EP 0015357 A1 EP0015357 A1 EP 0015357A1
Authority
EP
European Patent Office
Prior art keywords
bottom wall
drying
chamber
manure
drying chamber
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
EP19790850014
Other languages
English (en)
French (fr)
Other versions
EP0015357B1 (de
Inventor
Per Ake Nilsson
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
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to DE7979850014T priority Critical patent/DE2967557D1/de
Priority to EP19790850014 priority patent/EP0015357B1/de
Publication of EP0015357A1 publication Critical patent/EP0015357A1/de
Application granted granted Critical
Publication of EP0015357B1 publication Critical patent/EP0015357B1/de
Expired 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
    • 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
    • F26B23/00—Heating arrangements
    • F26B23/02—Heating arrangements using combustion heating
    • F26B23/022—Heating arrangements using combustion heating incinerating volatiles in the dryer exhaust gases, the produced hot gases being wholly, partly or not recycled into the drying enclosure
    • 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
    • F26B25/005—Treatment of dryer exhaust gases
    • F26B25/006—Separating volatiles, e.g. recovering solvents from dryer exhaust gases
    • 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
    • F26B25/06—Chambers, containers, or receptacles
    • F26B25/08—Parts thereof
    • F26B25/10—Floors, roofs, or bottoms; False bottoms
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B3/00—Drying solid materials or objects by processes involving the application of heat
    • F26B3/18—Drying solid materials or objects by processes involving the application of heat by conduction, i.e. the heat is conveyed from the heat source, e.g. gas flame, to the materials or objects to be dried by direct contact
    • F26B3/22—Drying solid materials or objects by processes involving the application of heat by conduction, i.e. the heat is conveyed from the heat source, e.g. gas flame, to the materials or objects to be dried by direct contact the heat source and the materials or objects to be dried being in relative motion, e.g. of vibration
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B9/00—Machines or apparatus for drying solid materials or objects at rest or with only local agitation; Domestic airing cupboards
    • F26B9/06—Machines or apparatus for drying solid materials or objects at rest or with only local agitation; Domestic airing cupboards in stationary drums or chambers
    • F26B9/08—Machines or apparatus for drying solid materials or objects at rest or with only local agitation; Domestic airing cupboards in stationary drums or chambers including agitating devices, e.g. pneumatic recirculation arrangements
    • F26B9/082—Machines or apparatus for drying solid materials or objects at rest or with only local agitation; Domestic airing cupboards in stationary drums or chambers including agitating devices, e.g. pneumatic recirculation arrangements mechanically agitating or recirculating the material being dried

Definitions

  • the present invention relates to an apparatus for drying manure and similar residual products which apparatus includes a heating chamber with an associated heating device for the heating of manure in a drying chamber placed thereover and separated from the heating chamber by its bottom wall, and an agitator disposed in the drying chamber and having at least one agitator arm.
  • the arm of the agitator is to move in contact with the upper surface of the bottom wall of the drying chamber for preventing manure to be baked to the bottom wall.
  • the bottom wall When operating the drying apparatus the bottom wall will be heated and expands. Since the bottom wall is fixed to the side walls of the drying apparatus, the bottom wall be buckled and so the agitator which is relatively rigid cannot, when being moved, be applied against the entire surface of the bottom wall. Thus, in the prior art drying apparatus manure will be baked to some portions of the bottom wall and so heat transfer from the heat chamber therebelow to the drying chamber will be reduced. The baked manure will press the agitator arm upwards, and after a short while a cake of baked manure is formed over the entire bottom of the drying chamber.
  • vapours which during the heat treatment evaporate from the manure. These vapours are brought to a condensation device where the major part is condensed and the residual part is delivered to the ambient atmosphere. Although the amount is small, the residual vapour part delivered to the ambient atmosphere will cause an embarassing smell in the vicinity and in the surroundings of the drying apparatus. In prior art drying apparatus said vapours also escape from the drying chamber through bushings for the agitator shaft and through the supply opening, thereby aggravating the problem of the smell.
  • the purpose of the invention is to obtain a drying apparatus of that kind mentioned by way of introduction, which apparatus eliminates the above mentioned drawbacks.
  • the drying apparatus eliminates almost entirely the problem of the smell. Moreover, in the operation of the drying apparatus a satisfactory contact is obtained for the agitator arm against the bottom wall of the drying chamber.
  • an apparatus for drying manure and like residual products which apparatus the agitator arm is biased against said bottom wall to provide for contact against said bottom wall during the operation of the drying apparatus and/or that said bottom wall is supported freely at its peripheral portion for eliminating buckling of the bottom wall when subjected to heat during the operation of the drying apparatus.
  • the apparatus has a condensation device connected to the drying chamber for receiving and condensating vapours evaporated from the manure in the drying process, a collecting vessel connected to the outlet of the condensation device, as well as an expel fan for expelling said vapours to the condensation device.
  • the heating device is a burner for fossile combustibles and rest gas obtained from the condensation device is supplied to the heating chamber for combustion therein.
  • drying apparatus by way of non-limiting example is used'for drying fowl manure.
  • the drying apparatus can be used for all kinds of similar residual products, including digested sludge from sewage treatment plants.
  • Fig. 1 shows a prior art apparatus for drying manure, which appa- .ratus is provided with means according to the invention.
  • the drying apparatus referenced 1, is made of steel and stands on a foundation 2.
  • the drying apparatus has bottom heat chamber 3 which communicates with a heating device 4, e.g. an oil burner.
  • a drying chamber 5 is provided separated from the heat chamber by means of its bottom wall 6 having a plain upper surface.
  • An agitator 7 is provided with a shaft 8 centrally located in drying chamber 5 which has a preferred circular cross section shape.
  • Agitator 7 at the lower portion of shaft 8, which is located adjacent to the bottom wall 6, has a rigid agitator arm 9 attached thereto which arm along its extension contacts the upper surface of the bottom wall 6.
  • a motor 11 connected to shaft 8 is supported on.a frame on the top of the apparatus.
  • the motor is arranged for rotating shaft 8 and the agitator arm 9 which will stir up manure from the bottom wall and prevent manure from baking to said surface.
  • Manure to be dried is supplied to the drying chamber through a supply opening closed by means of a door 10.
  • Shaft 8 has a not shown guide on the bottom wall 6.
  • a condensation device 20 for treatment of vapours, including certain gases, evaporated from the manure under the drying process is shown on the apparatus top portion for reducing the problems of bad smell which usually exists in drying manure.
  • a discharge box 50 For the discharge of dried manure from the drying chamber a discharge box 50 is provided.
  • the discharge box is separated from the heat chamber by means of vertical walls and has a door 51 in bottom wall 6 to be maneconferenced from outside the drying apparatus.
  • a prior art discharge box (not shown) has a horizontal bottom at the level of the heat chamber bottom and an opening in the side wall of the drying apparatus, from which opening dried manure can be discharged on a conveyor.
  • the drying apparatus has a not shown discharge device for combustion gases and may be provided with a not shown circulation means for combustion gases for obtaining a uniform temperature in the heat chamber.
  • bottom wall 6 at its peripheral portion is supported freely at the side walls of the drying apparatus, said support consisting of continuous or divided flange means, preferably a continuous rim 12, protruding from the side walls.
  • the bottom wall 6 has a diameter which is slightly less than the diameter of the drying chamber at its bottom when the heat chamber is heated to its operating temperature which is approximately 200°C.
  • radial ribs 14 are provided on the bottom side of bottom wall 6, said ribs comprising flat iron bars, each being spot welded at one of their narrow sides to the bottom wall. Ribs 14 are uniformly spaced around the bottom wall. In Fig. 3 three ribs 14 are shown in dashed lines.
  • radial notches 13 are made in the bottom wall around its circumference.
  • the notches 13 cooperate with vertical shoulders 14 on the upper side of the rim 12. Said shoulders preferably have the J same height as the thickness of the bottom wall in order not to be of hindrance to the rotating agitator arm.
  • a pressure arm 30 is disposed between shaft 8 and the agitator arm 9. Spaced from the lower portion of shaft 8 there is around the shaft clamped a collar 31 having two projecting parallel ears 32 between which an axle bar 33 is mounted. Two opposing ears 34 having an intermediate axle bar 35 are disposed on the upper side of the agitator arm 9.
  • the pressure arm 30 which in a preferred embodiment of the agitator assembly includes two sections 36, 37 and an intermediary biasing'means 38 is fixed at its ends to said axle bars by means of bushings. Thus, pressure arm 30 is pivotably supported at its both ends.
  • Section 36 of the pressure arm connected to shaft 8 has a first pipe with a flange 39 at its free end.
  • Section 37 of the pressure arm connected to the agitator arm 9 has a second pipe with a small diameter, which pipe is movably supported in said first pipe. Spaced from said first pipe a stop 40 is fixed to the second pipe.
  • the biasing means 38 is placed between stop 40 and flange 39 on the first pipe and has the shape of a pressure spring for urging agitator arm 9 against bottom wall 6.
  • pressure arm 30 urges the agitator arm 9, which at its point of attachment to shaft 8 is rotatably supported around a shaft 42, against the bottom wall.
  • Agitator arm 9 is made of a resistant rigid material to be substantially plane in operation.
  • Agitator arm 9 has two sections, viz. one radial section 43 connected to shaft 8 and an outer section 44 positioned in-the same plane but somewhat angles in the direction of rotation (referenced with arrow 45). Owing to this a pocket 46 is formed towards which manure scraped from the bottom is gathered when agitator arm 9 is rotated in the drying chamber. Pocket 46 has a radial position over door 51 so that dried manure for the purpose of discharging is scraped down into the discharge box 50 when door 51 is open. Moreover agitator arm 9 along its forward portion seen in the direction of rotation may have a longitudinal section 47 of particularly resistant material.
  • Discharge box 50 occupies a a section of heat chamber 3 separated therefrom by means of walls and has a transmission part to the collecting pocket 52.
  • the latter has an outwardly and upwardly sloping bottom and a conveyor 53, preferably a screw conveyor, is provided for conveying the dried manure material from the collecting pocket. Owing to this the drying apparatus can be operated substantially continuous such that the uneconomical starting phase for heating the drying apparatus to its operating temperature is eliminated.
  • an expel fan 32 is provided to positively expel to the condensation device 20 the vapours obtained in the drying of manure. Owing to this a negative pressure or a vacuum is created in the drying chamber and so there will be no leakage of vapours to the ambient atmosphere.
  • a dome 21 is provided in the roof of the drying chamber for collecting the vapours obtained in the drying process.
  • At least one, and preferably two discharge conduits 24 connects dome 21 to the condensation device 20 which is a conventional heat exchange assembly for cooling the vapours conveyed thereto for condensation.
  • the empeller 23 of fan 22 is positioned in dome 21 and arranged to expel said vapours to the condensation device 20.
  • the empeller 23 and the shaft of the empeller is made of a material. which is highly resistant to said vapours.
  • a conduit 25 connects the output of the condensation device to a collecting vessel 26 for condensation water and residual gas. From the upper portion of collecting vessel 26 a conduit 27 extends to heat chamber 3 for the transfer of the residual gas thereto.
  • Conduit 27 opens to heat chamber 3 adjacent to heating device 4 which is a burner for fossile combustibles.
  • heating device 4 which is a burner for fossile combustibles.
  • the burner is a gas or oil burner 4.
  • conduit 27 opens adjacent to the air inlet of the burner 4 and so the residual gas obtained in the condensation is fed through the air inlet into the heat chamber, there being subjected to combustion together with fresh air and the combustible of the burner.
  • Collecting vessel 26 has a large volume for serving as a buffer storage for residual gas when the burner is off.
EP19790850014 1979-03-07 1979-03-07 Vorrichtung zum Trocknen von Mist und ähnlichem Restgut Expired EP0015357B1 (de)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE7979850014T DE2967557D1 (en) 1979-03-07 1979-03-07 Apparatus for drying manure and similar residual products
EP19790850014 EP0015357B1 (de) 1979-03-07 1979-03-07 Vorrichtung zum Trocknen von Mist und ähnlichem Restgut

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP19790850014 EP0015357B1 (de) 1979-03-07 1979-03-07 Vorrichtung zum Trocknen von Mist und ähnlichem Restgut

Publications (2)

Publication Number Publication Date
EP0015357A1 true EP0015357A1 (de) 1980-09-17
EP0015357B1 EP0015357B1 (de) 1985-12-27

Family

ID=8186545

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19790850014 Expired EP0015357B1 (de) 1979-03-07 1979-03-07 Vorrichtung zum Trocknen von Mist und ähnlichem Restgut

Country Status (2)

Country Link
EP (1) EP0015357B1 (de)
DE (1) DE2967557D1 (de)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4441880A (en) * 1981-04-23 1984-04-10 Pownall Spencer Engineering, Ltd. Drying apparatus
FR2759448A1 (fr) * 1997-02-10 1998-08-14 E R S E Soc Dispositif de deshydratation des dechets d'origne animale ou vegetale en vue de leur recyclage
WO1999066276A1 (en) * 1998-06-18 1999-12-23 Agrex S.P.A. A drier for grain and granular materials in general
WO2010010585A1 (en) * 2008-07-25 2010-01-28 A.G.T. Srl Drying plant
CN108562145A (zh) * 2018-04-20 2018-09-21 道真仡佬族苗族自治县好未来中药材农民专业合作社 洛党参种子干燥分筛机
CN111397326A (zh) * 2020-04-02 2020-07-10 蔡国梁 一种污水处理吸附剂颗粒活性炭成型制备方法

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB191506318A (en) * 1915-04-28 1915-09-09 Torrance & Sons Ltd Improvements in and relating to Drying-floors.
GB155493A (en) * 1920-03-11 1920-12-23 Hugh Blackie Lowden Improvement in the method of and apparatus for drying or partially eliminating moisture from materials
FR523816A (fr) * 1915-05-11 1921-08-25 Karl Niessen Procédé et appareil pour cuire et sécher les matières organiques, notamment les déchets d'abattoirs
DE416780C (de) * 1924-04-06 1925-07-25 Curt Mueller Dr Trockenkammer mit veraenderlicher Hoehe fuer Giessereizwecke
US1822486A (en) * 1926-02-19 1931-09-08 Nat Aniline & Chem Co Inc Drier
GB398628A (en) * 1932-07-25 1933-09-21 Murphy John Automatic kiln drying apparatus
GB781154A (en) * 1955-12-29 1957-08-14 Hermann Orth A two-zone dryer
US3004347A (en) * 1958-12-08 1961-10-17 Sun Oil Co Drying of solid materials

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB191506318A (en) * 1915-04-28 1915-09-09 Torrance & Sons Ltd Improvements in and relating to Drying-floors.
FR523816A (fr) * 1915-05-11 1921-08-25 Karl Niessen Procédé et appareil pour cuire et sécher les matières organiques, notamment les déchets d'abattoirs
GB155493A (en) * 1920-03-11 1920-12-23 Hugh Blackie Lowden Improvement in the method of and apparatus for drying or partially eliminating moisture from materials
DE416780C (de) * 1924-04-06 1925-07-25 Curt Mueller Dr Trockenkammer mit veraenderlicher Hoehe fuer Giessereizwecke
US1822486A (en) * 1926-02-19 1931-09-08 Nat Aniline & Chem Co Inc Drier
GB398628A (en) * 1932-07-25 1933-09-21 Murphy John Automatic kiln drying apparatus
GB781154A (en) * 1955-12-29 1957-08-14 Hermann Orth A two-zone dryer
US3004347A (en) * 1958-12-08 1961-10-17 Sun Oil Co Drying of solid materials

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4441880A (en) * 1981-04-23 1984-04-10 Pownall Spencer Engineering, Ltd. Drying apparatus
FR2759448A1 (fr) * 1997-02-10 1998-08-14 E R S E Soc Dispositif de deshydratation des dechets d'origne animale ou vegetale en vue de leur recyclage
WO1999066276A1 (en) * 1998-06-18 1999-12-23 Agrex S.P.A. A drier for grain and granular materials in general
WO2010010585A1 (en) * 2008-07-25 2010-01-28 A.G.T. Srl Drying plant
CN108562145A (zh) * 2018-04-20 2018-09-21 道真仡佬族苗族自治县好未来中药材农民专业合作社 洛党参种子干燥分筛机
CN111397326A (zh) * 2020-04-02 2020-07-10 蔡国梁 一种污水处理吸附剂颗粒活性炭成型制备方法

Also Published As

Publication number Publication date
DE2967557D1 (en) 1986-02-06
EP0015357B1 (de) 1985-12-27

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