US3837092A - Apparatus for cooling or drying pourable material - Google Patents

Apparatus for cooling or drying pourable material Download PDF

Info

Publication number
US3837092A
US3837092A US00355664A US35566473A US3837092A US 3837092 A US3837092 A US 3837092A US 00355664 A US00355664 A US 00355664A US 35566473 A US35566473 A US 35566473A US 3837092 A US3837092 A US 3837092A
Authority
US
United States
Prior art keywords
feed pipe
tank
set forth
ring
ring discs
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
US00355664A
Other languages
English (en)
Inventor
O Mayer
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.)
Georg Fischer AG
Original Assignee
Georg Fischer 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 Georg Fischer AG filed Critical Georg Fischer AG
Application granted granted Critical
Publication of US3837092A publication Critical patent/US3837092A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C5/00—Machines or devices specially designed for dressing or handling the mould material so far as specially adapted for that purpose
    • B22C5/08—Machines or devices specially designed for dressing or handling the mould material so far as specially adapted for that purpose by sprinkling, cooling, or drying
    • 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
    • F26B17/12—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement with movement performed solely by gravity, i.e. the material moving through a substantially vertical drying enclosure, e.g. shaft
    • F26B17/122—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement with movement performed solely by gravity, i.e. the material moving through a substantially vertical drying enclosure, e.g. shaft the material moving through a cross-flow of drying gas; the drying enclosure, e.g. shaft, consisting of substantially vertical, perforated walls
    • 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
    • F26B17/12—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement with movement performed solely by gravity, i.e. the material moving through a substantially vertical drying enclosure, e.g. shaft
    • F26B17/14—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement with movement performed solely by gravity, i.e. the material moving through a substantially vertical drying enclosure, e.g. shaft the materials moving through a counter-current of gas
    • F26B17/1408—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement with movement performed solely by gravity, i.e. the material moving through a substantially vertical drying enclosure, e.g. shaft the materials moving through a counter-current of gas the gas being supplied and optionally extracted through ducts extending into the moving stack of material
    • F26B17/1425—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement with movement performed solely by gravity, i.e. the material moving through a substantially vertical drying enclosure, e.g. shaft the materials moving through a counter-current of gas the gas being supplied and optionally extracted through ducts extending into the moving stack of material the ducts being perforated and arranged vertically
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28C—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA COME INTO DIRECT CONTACT WITHOUT CHEMICAL INTERACTION
    • F28C3/00—Other direct-contact heat-exchange apparatus
    • F28C3/10—Other direct-contact heat-exchange apparatus one heat-exchange medium at least being a fluent solid, e.g. a particulate material
    • F28C3/12—Other direct-contact heat-exchange apparatus one heat-exchange medium at least being a fluent solid, e.g. a particulate material the heat-exchange medium being a particulate material and a gas, vapour, or liquid
    • F28C3/14—Other direct-contact heat-exchange apparatus one heat-exchange medium at least being a fluent solid, e.g. a particulate material the heat-exchange medium being a particulate material and a gas, vapour, or liquid the particulate material moving by gravity, e.g. down a tube
    • 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
    • F26B2200/14—Sand

Definitions

  • the present invention is directed to an apparatusfor cooling or drying at pourable material or bulk material, such as a pretreated foundry sand, by means of a gaseous medium traversing the pourable material, and, more particularly, it is directed to the arrangement of the apparatus including a tank into which thematerial is introduced at its upper end through a tubular passageway so that it flows downwardly about a feed pipe containing openings along its length for introducing the gaseous mediuminto the material and, further, it concernsthe arrangement of horizontally arranged, vertically spaced ring discs located outwardly from the feed pipe and'inwardly from the tank. At the lower end of the tank a device is arranged for discharging the treated pourable material.
  • a sieve drum centrifuge which includes a central feed drum for the material which is provided with conveyor elements.
  • the centrifuge is concentrically enclosedby a'housing and circulating drying air enters-the centrifuge in the axial direction and issues-radiallyfrom it passing through the material layer which adheres to the wall of the centrifuge.
  • the operation of such an apparatus is difficult, however, because the-material adhering to the wall of the centrifuge is aerated only at those locations where openings are-provided-for the drying air. Further, because the bearings of the centrifugal drum are in the range of the material being treated, they are subjected to considerable'wear.
  • a tank is provided into which the material is supplied at its upper end and is removed at its lower end and the tank contains channels which have the form of parallel screw turns about a common axis and eachchannel consists, in the longitudinal direction, of two parts elastically connected to gether with each part having a separate drive and a device for aerating the material is located within the tank.
  • the aeration of the bulk material depends, to a great extent, on the sliding capacity of the material, accordingly, a uniform passage of the material through the tank is not ensured when the material is sticky.
  • movable parts are located within the pourable material, particularly when the material is foundry sand, there is excessive wear in such parts.
  • Still another known apparatus is a ring disc dryer which contains rotating discs formed of segmentshaped plates which are arranged side-by-side on a circular ring with at least two and not more than three charging and transfer zones being arranged for charging the material onto the uppermost disc and for transferring the material from one disc to another.
  • the ring discs form an interior in which several tu'rbofans are provided for air circulation.
  • a disadvantage of this arrangement is that the moving parts are exposed to excessive wear in the range of the pourable material.
  • the primary object of the present invention to overcome the problems and disadvantages experienced in the known apparatus by utilizing a tank for the flow through of the material to be treated which does not contain any moving parts in contact with the material. Further, the structure within the interior of the tank is arranged so that a vertically extending annular cavity is provided outwardly from the material and inwardly from the tank wall to assure a constant flow of the gaseous medium through the pourable material.
  • horizontally arranged, vertically spaced ring discs are mounted in fixed positions within the tank encircling the feed pipe which supplies the gaseous medium.
  • the inner edges or peripheries of the discs are-spaced outwardly from the feed pipe so that the downwardly flowing material enters between adjacent ones of the discs and forms a frusto-conically shaped layer with itsouter surface spaced inwardly from the tank wall.
  • the gaseous medium flowing between the two adjacent ring discs exits from the surface of the material into an open space outwardly of the ringdiscs.
  • the treatment of the pourable material over the height of the tank can be varied by varying the cross sectional area of the openings in the feed pipe, by varying the spacing of-the ring discs and by varying the dimensions of the ring discs.
  • FIG. 1 is a vertical sectional view of one embodiment of the present invention
  • FIG. 2 is a vertical sectional view, similartoFIG. 1 of another embodiment of the present invention.
  • FIG. 3 is a vertical sectional view similar to FIGS. 1 and 2 of still another embodiment of the present invention.
  • FIG. 4 is a vertical sectional view similar to FIGS. 1 to 3 showing'still another embodiment of the present invention.
  • FIG. 1 a vertically arranged treatment tank l is shown with a tubular shaped feed passageway 2 connected to its upper end for introducing a pourablematerial into the tank.
  • a frusto-conically shaped feed pipe 4 Concentrically arranged about the vertical axis of the tank is a frusto-conically shaped feed pipe 4 which extends downwardly through the tank and has circular openings 5 for supplying a gaseous medium into the tank for flow through the pourable material.
  • the feed pipe extends for substantially the full height of the tank. Extending about the feed pipe are horizontally arranged vertically spaced ring discs 6 fixedly secured within the tank. The discs are arranged about the feed pipe from its upper to its ,lowerend.
  • each annular or ring disc is spaced outwardly from the feed pipe and, similarly,,theouter peripheryof eachring disc is spaced inwardly from the At the lower or outlet end 7 of the tank.
  • A. variable drive is provided for the discharge device 8 and the drive can be operated from a central control plant, not shown, over a control line 18 and a control device 16.
  • a level gauge 17 is arranged which is connected over a control line 19 to the central control plant and also controls the conveyor for supplying the pourable material.
  • an exhaust pipe 12 is arranged in communication with the upper end of the annular outer cavity or space for withdrawing the gaseous medium after its passage through the pourable material.
  • a feed line 13 extends into the tubular passageway 2 and is connected to the upper end of the feed pipe 4 for supplying the gaseous medium and a valve 14 is located in the feed line and it is actuated by a control device connected to the central control plant.
  • FIGS. 2, 3 and 4 different embodiments of the apparatus are shown, as compared to FIG. 1, however, similar parts are designated with the same reference numerals.
  • a cylindrically shaped feed pipe 21 extends downwardly through the tank and contains rectangularly shaped openings 5' spaced along its length between each pair of adjacent ring discs. Further, as can be noted in FIG. 2, the outside diameter of the ring discs increases in the downward direction while the spacing between the discs is maintained the same.
  • a cylindrically shaped feed pipe 23 extends downwardly through the tank 1, however, its circular openings 5 decrease in cross sectional area in the downward direction of the feed pipe. Further, in the embodiment of FIG. 3 the ring discs 6 are uniformly dimensioned and spaced.
  • FIG. 2 a cylindrically shaped feed pipe 21 extends downwardly through the tank and contains rectangularly shaped openings 5' spaced along its length between each pair of adjacent ring discs. Further, as can be noted in FIG. 2, the outside diameter of the ring discs increases in the downward direction while the
  • the feed pipe 24 is formed of a plurality of slightly overlapping frustoconically shaped rings 25 with the smaller diameter ends of the rings spaced upwardly above the larger diameter ends.
  • the larger diameter end of each ring extends downwardly below and about the smaller diameter end of the next lower ring.
  • the end diameters of the overlapping rings 25 are arranged so that openings are provided between their respective outer and inner surfaces.
  • the ring discs 22 increase in outside diameter in the downward direction and the spacing between adjacent ring discs also increases in the downward direction.
  • a pourable material for example, a pre-treated foundry sand
  • a feeding device not shown
  • the tubular passageway 2 into the tank Landthe sand passes downwardly through the inner annular space 11 gradually filling the space about the feed pipe.
  • a frusto-conically shaped layer of the sand is formed between each pair of adjacent ring discs.
  • the radially outer surface of each layer has a sloping or frusto-conical shape 9.
  • a control impulse is emitted from the gauge to actuate the valve in the gaseous-medium feed line 13 and to start the discharge device 8;
  • a certain flow path is formed for the gaseous medium flowing through the material and this flow path may be variable over the height of the tank in consideration of the material being treated.
  • the gaseous medium escapes from the material along its laterally disposed frusto-conically shaped surface 9 and enters the outer cavity or space 10 at a very low flow velocity.
  • the treated material is fedby the discharge device 8 to a conveyor means, not shown, for example, a conveyor belt or conveyor trough. It has been found to be expedient to provide the discharge device 8 with a variable discharge rate to obtain the optimum treatment of the pourable material 3.
  • Apparatus for cooling or drying a pourable material, such as a pre-treated foundry sand, by passing a gaseous medium through the pourable material comprising a vertically extending tank, a tubular passageway connected to the upper end of said tank for supplying the pourable material into said tank, a vertically arranged feed pipe positioned within said tank and aligned below said tubular passageway, said feed pipe having a plurality of openings therethrough at spaced positions along its length, said feed pipe arranged to receive the gaseous medium and to distribute it through its openings into the pourable material, ring discs positioned within said tank and extending transversely of the axial direction of said feed pipe, an outlet for the material to be treated located in the lower end of said tank, and a discharge device located below the outlet for the material to be treated for discharging the pourable material after its downward passage through said tank, wherein the improvement comprises that said feed pipe is centrally positioned within said tank and the lower end of said feed pipe is located in the lower end of said tank,
  • Apparatus as set forth in claim 10, wherein the openings in said feed pipe have decreasing cross sectional areas in the downward direction of said feed pipe.
  • Apparatus as set forth in claim 1, including means for variably driving said discharge device.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Feeding, Discharge, Calcimining, Fusing, And Gas-Generation Devices (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)
  • Mold Materials And Core Materials (AREA)
  • Drying Of Solid Materials (AREA)
US00355664A 1972-05-01 1973-04-30 Apparatus for cooling or drying pourable material Expired - Lifetime US3837092A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH647472A CH555283A (de) 1972-05-01 1972-05-01 Vorrichtung zur kuehlung oder trocknung von schuettfaehigem gut.

Publications (1)

Publication Number Publication Date
US3837092A true US3837092A (en) 1974-09-24

Family

ID=4310213

Family Applications (1)

Application Number Title Priority Date Filing Date
US00355664A Expired - Lifetime US3837092A (en) 1972-05-01 1973-04-30 Apparatus for cooling or drying pourable material

Country Status (5)

Country Link
US (1) US3837092A (enrdf_load_stackoverflow)
CH (1) CH555283A (enrdf_load_stackoverflow)
FR (1) FR2183074B1 (enrdf_load_stackoverflow)
GB (1) GB1424274A (enrdf_load_stackoverflow)
IT (1) IT984236B (enrdf_load_stackoverflow)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3903612A (en) * 1974-06-26 1975-09-09 Fuller Co Apparatus for preheating solid particulate material
US4458428A (en) * 1981-03-16 1984-07-10 Olin Corporation Glass batch pellet production and drying process and apparatus
EP0124294A3 (en) * 1983-04-05 1985-10-09 Cactus Machinery Inc. Apparatus for conditioning hygroscopie plastic material
US20070205405A1 (en) * 2006-01-17 2007-09-06 Gorbel, Inc. Lift actuator
ITPR20080079A1 (it) * 2008-11-19 2010-05-20 Imas S P A Silos per l'essicazione di prodotti e/o composti a granulometrie varibili, polveri, scaglie e granuli
US20110070149A1 (en) * 2007-10-10 2011-03-24 Eni S.P.A. Thin layer fixed bed reactor for the chemical treatment of a finely divided catalytic solid
CN106839734A (zh) * 2017-03-07 2017-06-13 重庆赛迪热工环保工程技术有限公司 一种干燥或者冷却团块的装置及方法
CN106825395A (zh) * 2017-04-25 2017-06-13 重庆钢铁(集团)有限责任公司 实型铸造用型砂批序式循环冷却处理方法
CN112623526A (zh) * 2021-02-06 2021-04-09 酒泉市汉鑫科技有限公司 一种易粘结物料用的振动烘干装置
IT202100015662A1 (it) * 2021-06-15 2022-12-15 Qd S R L Apparecchiatura di scambio per scambiare calore e/o massa tra un materiale granulare e una corrente gassosa

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2458038A1 (fr) * 1979-05-28 1980-12-26 Saint Gobain Sechoir pour melange vitrifiable compacte
DE102006015778B3 (de) * 2006-04-04 2007-06-28 Brandenburgische Technische Universität Vorrichtung zum Kühlen von rieselfähigen Schüttgütern in Lagerbehältern
CN114812122B (zh) * 2022-05-24 2024-07-23 华能铜川照金煤电有限公司西川煤矿分公司 一种煤炭选矿用烘干装置

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1558119A (en) * 1924-11-06 1925-10-20 Bonnot Company Drying apparatus
US2429980A (en) * 1942-11-27 1947-11-04 Lion Oil Co Process of conducting chemical reactions
US2861356A (en) * 1956-06-14 1958-11-25 Allis Chalmers Mfg Co Apparatus for cooling granular materials
US3025043A (en) * 1957-05-03 1962-03-13 Pechiney Prod Chimiques Sa Vaporization apparatus

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1558119A (en) * 1924-11-06 1925-10-20 Bonnot Company Drying apparatus
US2429980A (en) * 1942-11-27 1947-11-04 Lion Oil Co Process of conducting chemical reactions
US2861356A (en) * 1956-06-14 1958-11-25 Allis Chalmers Mfg Co Apparatus for cooling granular materials
US3025043A (en) * 1957-05-03 1962-03-13 Pechiney Prod Chimiques Sa Vaporization apparatus

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3903612A (en) * 1974-06-26 1975-09-09 Fuller Co Apparatus for preheating solid particulate material
US4458428A (en) * 1981-03-16 1984-07-10 Olin Corporation Glass batch pellet production and drying process and apparatus
EP0124294A3 (en) * 1983-04-05 1985-10-09 Cactus Machinery Inc. Apparatus for conditioning hygroscopie plastic material
US20070205405A1 (en) * 2006-01-17 2007-09-06 Gorbel, Inc. Lift actuator
US9050569B2 (en) * 2007-10-10 2015-06-09 -Eni S.P.A. Thin layer fixed bed reactor for the chemical treatment of a finely divided catalytic solid
US20110070149A1 (en) * 2007-10-10 2011-03-24 Eni S.P.A. Thin layer fixed bed reactor for the chemical treatment of a finely divided catalytic solid
ITPR20080079A1 (it) * 2008-11-19 2010-05-20 Imas S P A Silos per l'essicazione di prodotti e/o composti a granulometrie varibili, polveri, scaglie e granuli
CN106839734A (zh) * 2017-03-07 2017-06-13 重庆赛迪热工环保工程技术有限公司 一种干燥或者冷却团块的装置及方法
CN106839734B (zh) * 2017-03-07 2019-04-19 重庆赛迪热工环保工程技术有限公司 一种干燥或者冷却团块的装置及方法
CN106825395A (zh) * 2017-04-25 2017-06-13 重庆钢铁(集团)有限责任公司 实型铸造用型砂批序式循环冷却处理方法
CN112623526A (zh) * 2021-02-06 2021-04-09 酒泉市汉鑫科技有限公司 一种易粘结物料用的振动烘干装置
IT202100015662A1 (it) * 2021-06-15 2022-12-15 Qd S R L Apparecchiatura di scambio per scambiare calore e/o massa tra un materiale granulare e una corrente gassosa
EP4105184A3 (en) * 2021-06-15 2023-02-15 QD S.r.l. Exchange apparatus for heat and/or mass exchange between a granular material and a gaseous current

Also Published As

Publication number Publication date
DE2312440A1 (de) 1973-11-22
FR2183074B1 (enrdf_load_stackoverflow) 1976-11-12
FR2183074A1 (enrdf_load_stackoverflow) 1973-12-14
DE2312440B2 (de) 1975-07-24
GB1424274A (en) 1976-02-11
IT984236B (it) 1974-11-20
CH555283A (de) 1974-10-31

Similar Documents

Publication Publication Date Title
US3837092A (en) Apparatus for cooling or drying pourable material
US3765102A (en) Rotary apparatus for treating particulate material
CS207325B2 (en) Horizontal drum for cooling the castings and cooling and drying the moulding sand
US3264751A (en) Heat-exchange method and apparatus
EP0153704B1 (en) Process and apparatus for removal of liquid from a solid particulate material
US4130944A (en) Centrifugal fluidized-bed drying method and apparatus
US2460008A (en) Concurrent flow drier with rotor, stationary casing, and terminal separation means for drying materials and drying fluid
UA126981C2 (uk) Сушильний бункер, а також розмельно-сушильний комплекс, який включає в себе такий бункер
US4076493A (en) Apparatus for cooling particulate material
US3028681A (en) Apparatus for treating granular materials
KR19990014849A (ko) 통기식 회전 건조기
JPS58501245A (ja) 粒状物質の処理
JPS624437A (ja) 水平又は傾斜した管状ク−ラ−内で粒状材料を冷却する方法及びその方法を使用するク−ラ−
US4025296A (en) Device for thermically treating granular and/or lumpy materials
US3889393A (en) Device for thermically treating granular and/or lumpy materials
US2794266A (en) Colling or drying of bulk material
US3692285A (en) Multi-stage calciner
US2745193A (en) Drier
SU1703932A1 (ru) Пневмосушилка дл дисперсного материала
SU1693334A1 (ru) Центробежна сушилка дл высоковлажного зерна
RU2041434C1 (ru) Установка для сушки сыпучих материалов
US2393227A (en) Apparatus for treating ores or other materials
US2506646A (en) Spray drier
US3872606A (en) Turntable feeder and cooler apparatus
SU892156A1 (ru) Сушилка дл сыпучих материалов