US3315371A - Quick drier for drying molten and pasty masses and for the production of powders and granulates in a hot or warm air stream - Google Patents

Quick drier for drying molten and pasty masses and for the production of powders and granulates in a hot or warm air stream Download PDF

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US3315371A
US3315371A US367179A US36717964A US3315371A US 3315371 A US3315371 A US 3315371A US 367179 A US367179 A US 367179A US 36717964 A US36717964 A US 36717964A US 3315371 A US3315371 A US 3315371A
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Prior art keywords
compartment
hot air
container
filter
air
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US367179A
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English (en)
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Glatt Werner
Wiedmann Hermann
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GLATT
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GLATT
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    • 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
    • F26B25/007—Dust filtering; Exhaust dust filters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B13/00—Conditioning or physical treatment of the material to be shaped
    • B29B13/06—Conditioning or physical treatment of the material to be shaped by drying
    • 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
    • F26B3/02—Drying solid materials or objects by processes involving the application of heat by convection, i.e. heat being conveyed from a heat source to the materials or objects to be dried by a gas or vapour, e.g. air
    • F26B3/06—Drying solid materials or objects by processes involving the application of heat by convection, i.e. heat being conveyed from a heat source to the materials or objects to be dried by a gas or vapour, e.g. air the gas or vapour flowing through the materials or objects to be dried
    • F26B3/08—Drying solid materials or objects by processes involving the application of heat by convection, i.e. heat being conveyed from a heat source to the materials or objects to be dried by a gas or vapour, e.g. air the gas or vapour flowing through the materials or objects to be dried so as to loosen them, e.g. to form a fluidised bed
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B5/00—Drying solid materials or objects by processes not involving the application of heat
    • F26B5/04—Drying solid materials or objects by processes not involving the application of heat by evaporation or sublimation of moisture under reduced pressure, e.g. in a vacuum
    • 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

Definitions

  • QUICK DRIER FOR DRYING MOLTEN AND PASTY MASSES AND FOR THE PRODUCTION OF POWDERS AND GRANULATES IN A HOT OR WARM AIR STREAM Filed May 13, 1964 4 Sheets-Sheet 2 April 25, 1937 w. GLATT ET AL 3,315,371 QUICK DRIER FOR DRYING MOLTEN AND PASTY MASSES AND FOR THE PRODUCTION OF POWDERS AND GRANULATES IN A HOT OR WARM AIR STREAM Filed y 13, 1964 4 Sheets-Sheet 3 26 5f W a; 271
  • a number of difierent processes are already known to the art for obtaining powder or .granu-late materials by drying damp, wet, molten or fiowable substances.
  • a receiver or container provided with a perforated or apertured bottom serves for the receipt of the material to be dried.
  • the air current utilized for drying is sucked or blown through a container by means of a blower after it has been cleaned in a pre-filter and heated by means of a heating apparatus.
  • the present invention has for one of its objects to provide an improved quick drier apparatus for materials which is capable of performing the drying operation in a quick and positive manner without subjecting the goods to considerable whirling and where the danger of clogging of the apparatus is elfectively prevented or at least considerably minimized.
  • a further extremely important object of the present invention resides in the provision of an improved drier apparatus of the mentioned type which possesses a high capacity, ensures for uniformity of the finished product and generally possesses universal applicability.
  • the present invention provides a quick drier for drying molten and pasty masses and for the production of powders and granulates in a hot or warm air current with a pressure lying beneath one atmosphere.
  • the inventive quick drier generally comprises a container or receiver for the material to be dried, an air suction device in order to suck the air through the aforesaid material, as well as filter means for separating such air from the material to be dried and a heating apparatus for heating the air destined to stream through the material.
  • the quick drier contains a hot air compartment for the air heated by the heating apparatus, that in this hot air compartment there is arranged a con tainer or vessel serving as receiver for the material to be dried, the wall of which is provided with a device for generating a downwardly directed hot or Warm air current out of the hot air compartment into the aforesaid vessel, and further, a filter compartment separated from the hot air compartment is arranged above the aforesaid vessel and in which there is located a filter connectable in airtight relation to the rim of this vessel.
  • FIGURE 4 illustrates the arrangement of the suction or exhaust blowers
  • FIGURE 5 illustrates a front view of a second embodiment of inventive quick drier, the doors of the housing being removed to expose the interior and with a number of members being shown in section.
  • FIGURES 1 to 4 the inside of the housing or cabinet 1 of the embodiment of inventive quick drier apparatus depicted in FIGURES 1 to 4 is divided by means of a floor 2 into two compartments 1a and 1b.
  • This floor 2 exhibits a circular opening 2a at which is seated a filter basket 3 which can be formed of metal or any suitable textile material.
  • a container or receiver 4 for housing the material to be dried is located beneath the opening 2a.
  • This container 4 possesses a fiat circular floor 4a and a conical downwardly tapering or constricting wall 4b.
  • An infeed or delivery funnel 12 closeable by a flap or valve 13 serves for filling the container 4.
  • An extension tube 13a of this delivery funnel 12 can extend up to the upper as well as also into the lower portion of the filter basket 3.
  • the valve or flap .13 is operated by means of a mechanism 14, only schematically illustrated in the drawings (FIGURE 2).
  • a funnel or hopper 15 serves to receive the dried maerial when the container 4 is emptied upon completion of the drying operation by rotating the shaft 7, as best seen by inspecting FIGURE 2 where such container 4 is depicted in phantom lines in its discharge position.
  • a closure flap or valve 16 closes the funnel 15 so that during the subsequent described drying operation air is not
  • Reference numeral 17 denotes the counterweight for the container 4.
  • the container 4 is provided with openings 4d in the region of the upper rim 40.
  • An air in'feed pipe or conduit 4e leads from each of the openings 4d into the container 4 such that the free pipe openings are downwardly directed.
  • a number of these pipes 4e are so long that they extend into the zone of the material to be dried, generally designated by reference numeral 22, others are shorter so that their free openings are located above such material 22 to be dried.
  • the entering hot drying air flows downwardly and double-passes through the material 22 to be dried it is mixed very thoroughly with the material 22 without however the entire material being whirled or spun upwardly into the filter basket 3, as such is the case with driers in which the container is provided with an apertured or perforated bottom. There is also, therefore, much less danger that the filter basket 3 will become clogged.
  • a stirring or agitating apparatus for comminuating lumps which tend to form.
  • a rotatable knife 29 driven via a pressure oil turbine 30.
  • the pressurized oil itself is delivered via a conduit or supply line 32 from a pressure oil pump 31 and arrives back at the aforesaid pump 31 by means of a second conduit or line 313..
  • the cabinet or housing 41 is internally divided into two compartments 41b and 41.0 by a floor member 42.
  • the floor member 42 exhibits a circular opening 42a at which is seated a filter 43 arranged in the filter compartment, generally designated by reference numeral 60.
  • This filter 43 in the present embodiment, consists of a plurality of cylindrical filter sacks or bags 44 open at .the bottom and closed at the top.
  • the container or vessel 45 tiltably mounted upon a frame structure 46.
  • the tilting or rocking action can be effected by means of a suitable non-illustrated lever arranged externally of the housing 41 and at the shaft 47.
  • a counterweight 58a serves the purpose of displacing the center of gravity of the empty vessel or container 45 at least in the region of the shaft 47.
  • FIGURE 5 there is shown in phantom lines the position which the vessel or container 45 assumes during emptying.
  • a sealing gasket or element 48 is arranged between the floor 42 and the vessel 45, the lower end or rim 48a of which can be pressed into sealing contact with the rim 45a of the vessel or container 45 by means of a pneumatic mechanism 49 for example.
  • the vessel or container is provided with a removable peripheral collar or rim 45b which can be detached after releasing the tensioning mechanism 50.
  • This peripheral rim or collar 45b is provided with holes or apertures 45d distributed throughout its entire periphery.
  • a sheet metal guide means 51 which, starting from the upper rim 450, extends at least approximately in the direction towards the center of the vessel floor, and at its lower end 51a is directed parallel to the wall 511) of the vessel or container 45.
  • the wall 51b of the container 45 incorporates a window 52 for viewing the condition of the material to be treated.
  • a rotating knife or a kneading or stirring mechanism 53 is arranged at the floor of the container 45 and which can be driven with adjustable speed by means of a suitable hydraulic pump which is not here visible in the drawing, however for example in the manner of the previously described embodiment.
  • the air can be sucked out of the compartment 411; above the floor 42, that is, from the filter compartment 60 and delivered to the surrounding atmosphere, by means of a two-stage blower, the motors of which are designated by reference numeral 64.
  • a heating element for heating the incoming air
  • a filter or filter means for cleaning such air For convenience in illustration such have not been shown in FIGURE 5, but it will be apparent that the arrangement can be similar to that of the previously described embodiment.
  • the material to be treated is initially filled through the funnel 55 and the pipe 56 into the vessel or container 45, whereby the lower rim 48a of the sealing gasket 48 already bears against the upper vessel edge or rim 45a and is rigidly held thereagainst by pistons 63 displaceable in associated cylinders 62. There-after, the flap or valve '54 is closed and the blower motors 64 are switched-on. Such now suck the air out of the filter compartment so that there exists at this location a vacuum or negative pressure and air flows through the filter 43.
  • the drying operation can be terminated, for example, by a timer or by means of a control switch which is tri-g gered by a hygrometer measuring the moisture of the sucked-01f air, or, also by a hand-operated switch since the person working with the apparatus can observe the condition of the material to be treated via the window 52 of the container 45 and through a further non-illustrated window arranged in the housing or cabinet doors, which as will be recalled have been removed in the present embodiment for purposes of exposing the housing interior.
  • the blower unit is then shut-01f, whereby the material falls out of the filter 43 back into the container 45.
  • the sealing gasket 48 is raised from the container 45 and the latter is tilted so that its contents can empty into the hopper 57, the flap or valve 58 of which, depending upon its construction, automatically opens under the weight of the discharged material or must be opened.
  • the hereindescribed quick driers are not, of course, limited in application solely for the drying of a molten or fiowable or pasty mass and for the production of powders or granulates for pharmaceutical purposes as well as for the production of coloring powders and other powders, rather, among their other uses, can be employed for the mixing of powders. Furthermore, it is possible to provide a fluid pipe and to thereby moisten a dry mixture so that it can be kneaded by means of the stirrer apparatus 53. The thus obtained pasty mass can subsequently be again dried to a powder or granulate.
  • a quick drier apparatus for drying fiowable and pasty masses and for the production of powders and granulates in a hot air current with a pressure beneath one atmosphere, comprising a housing, means for dividing said housing into at least a filter compartment and a hot air compartment, said filter compartment being disposed above and separated from said hot air compartment, container means for receiving material to be dried arranged in said hot air compartment, air suction means for reducing the air pressure above said hot air compartment to below atmospheric pressure in order to draw air through said material to be dried, filter means for separating the air from said material to be dried, heater means for heating the air destined to flow through said material to be dried, said hot air compartment receiving the air heated by said heater means, means cooperating with said container means for generating from said hot air compartment a hot air stream which is directed downwardly into said container means through the material to 'be dried and then under the action of said air suction means back upwardly through said material towards the top of said container means, to thereby provide a doublepass of the hot air stream through said material in said container
  • a quick drier apparatus as defined in claim 1 wherein said means for generating a downwardly directed hot air stream comprises delivery pipe means mounted to the wall of said container means.
  • a quick drier apparatus as defined in claim 1 wherein said means for generating a downwardly directed hot air stream comprises a plurality of openings provided in the wall of said container means and guide means located internally of said container means for downwardly directing the hot air stream entering through said openings.
  • a quick drier apparatus for drying fiowable and pasty masses and for the production of powders and granulates in a hot air current with a pressure beneath one atmosphere, comprising a housing, means for dividing said housing into at least a filter compartment and a hot air compartment, said filter compartment being disposed above and separated from said hot air compartment, container means for receiving material to be dried arranged in said hot air compartment, air suction means for drawing air through said material to be dried, filter means for separating the air from said material to be dried, heater means for heating the air destined to flow through said material to be dried, said hot air compartment receiving the air heated by said heater means, means cooperating with said container means for generating from said hot air compartment a hot air stream which is directed downwardly into said container means, a filter located in said filter compartment, means for connecting said filter in airtight relation to said container means, knife means serving as a comminuting mechanism rotata'bly mounted within said container means, and means for rotating said knife means.
  • a quick drier apparatus as defined in claim 6 including means for tiltably supporting said container means.
  • a quick drier apparatus as defined in claim 7 further including means cooperating with said container means to effect tilting thereof.
  • a quick drier apparatus comprising a housing, means for dividing said housing into at least a filter compartment and a hot air compartment, said filter compartment being disposed above and separated from said hot air compartment, container means for receiving material to be dried arranged in said hot air compartment, air suction means for reducing the air pressure above said hot air compartment to below atmospheric pressure in order to draw air through said material to be dried, heater means for heating the air destined to flow through said material to be dried, said hot air compartment receiving the air heated by said heater means, means cooperating with said container means for generating from said hot air compartment a hot air stream which is directed downw-ardly into said container means through the material to be dried and then under the action of said air suction means back upwardly through said material towards the top of said container means, to thereby provide a doublepass of the hot air stream through said material in said container means, a filter located in said filter compartment, and means for connecting said filter in airtight relation to said container means.
  • a quick drier apparatus for drying flowable and pasty masses and for the production of powders and granulates in a hot air current with a pressure beneath one atmosphere, comprising a housing, means for dividing said housing into at least a filter compartment and a hot air compartment, said filter compartment being disposed above and separated from said hot air compartment, container means open at its upper end to provide an upper container rim for receiving material to be dried and arranged in said hot air compartment, air suction means for reducing the air pressure above said hot air compartment to below atmospheric pressure in order to draw air through said material to be dried, heater means for heating the air destined to flow through said material to be dried, said hot air compartment receiving the air heated by said heater means, means cooperating with the walls of said container means for generating from said hot air compartment a hot air stream which is directed downwardly into said container means through the material to be dried and then under the action of said air suction means back upwardly through said material towards the top of said container means, to thereby provide a double-pass of the hot air stream through said material in said container
  • a quick drier apparatus comprising a housing, means for dividing said housing into at least a filter compartment and a hot air compartment, said filter compartment being disposed above and separated from said hot air compartment, container means open at its upper end to provide an upper container rim for receiving material to be dried and arranged in said hot air compartment, air suction means for drawing air through said material to be dried, heater means for heating the air destined to flow through said material to be dried, said hot air com partment receiving the air heated by said heater means, means cooperating with the walls of said container means for generating from said hot air compartment a hot air stream which is directed downwardly into said container means, a filter located in said filter compartment, means for connecting said filter in airtight relation to said upper container rim of said container means, said means for connecting said filter in airtight relation to said container means comprising displaceable sealing means.
  • a quick drier apparatus as defined in claim 11 including means for displacing said sealing means towards and away from said upper container rim of said container means.
  • a quick drier apparatus for drying flowable and pasty masses and for the production of powders and granulates in a hot air current with a pressure beneath one atmosphere, comprising a housing, means for dividing said housing into at least a filter compartment and a hot air compartment, said filter compartment being disposed above and separated from said hot air compartment, container means for receiving material to be dried arranged in said hot air compartment, air suction means for drawing air through said material to be dried, filter means for separating the air from said material to be dried, heater means for heating the air destined to flow through said material to be dried, said hot air compartment receiving the air heated by said heater means, means cooperating with said container means for generating from said hot air compartment a hot air stream which is directed downwardly into said container means, a filter located in said filter compartment, means for connecting said filter in airtight relation to said container means, said means for generating a downwardly directed hot air stream comprising a plurality of delivery pipe means mounted to the wall of said container means, each said delivery pipe 8 183.118 having a discharge
  • a quick drier apparatus comprising a housing, means for dividing said housing into at least a filter com partment and a hot air compartment, said filter compartment being disposed above and separated from said hot air compartment, container means open at its upper end to provide an upper container rim for receiving material to be dried and arranged in said hot air compartment, air suction means for drawing air through said material to be dried, heater means for heating the air destined to flow through said material to be dried, said hot air compartment receiving the air heated by said heater means, means cooperating with the walls of said container means for generating from said hot air compartment a hot air stream which is directed downwardly into said container means, a filter located in said filter compartment, said filter comprising a filter basket, and means for connecting said filter in airtight relation to said upper container rim of said container means.
  • a quick drier apparatus comprising a housing, means for dividing said housing into at least a filter compartment and a hot air compartment, said filter compartment being disposed above and separated from said hot air compartment, container means open at its upper end to provide an upper container rim for receiving material to be dried and arranged in said hot air compartment, air suction means for drawing air through said material to be dried, heater means for heating the air destined to flow through said material to be dried, said hot air compartment receiving the air heated by said heater means, means cooperating with the walls of said container means for generating from said hot air compartment a hot air stream which is directed downwardly into said container means, a filter located in said filter compartment, said filter comprising a plurality of individual filter sacks, and means for connecting said filter in airtight relation to said upper container rim of said container means.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Microbiology (AREA)
  • Health & Medical Sciences (AREA)
  • Molecular Biology (AREA)
  • Drying Of Solid Materials (AREA)
US367179A 1963-05-13 1964-05-13 Quick drier for drying molten and pasty masses and for the production of powders and granulates in a hot or warm air stream Expired - Lifetime US3315371A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH594863A CH405158A (de) 1963-05-13 1963-05-13 Verfahren zur Herstellung von Pudern und Granulat sowie Schnelltrockner zur Ausübung des Verfahrens

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5899391A (en) * 1997-11-17 1999-05-04 Hudnut Industries Inc. Cyclonic processing system
EP0828977A4 (de) * 1995-05-17 2000-06-14 Mallinckrodt Medical Inc Aggressive konvektionstrocknung in einem rührgefässtrockner
EP0828978A4 (de) * 1995-05-17 2000-06-28 Mallinckrodt Medical Inc Agressive konvektionstrocknung in einem nutschenfilter/-trockner
CN106168450A (zh) * 2016-08-11 2016-11-30 爱森（中国）絮凝剂有限公司 一种降低粉末原料含水率的化工生产设备
CN108369063A (zh) * 2015-12-18 2018-08-03 百旺公司 控制用于减湿和/或干燥的装置的方法和系统

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2067506A (en) * 1936-05-11 1937-01-12 Frank V Silva Casein drier
US2361297A (en) * 1941-12-26 1944-10-24 Alfred P Kutsche Rotary garment drier
US2704896A (en) * 1954-02-09 1955-03-29 Lionel P Hopkins Clothes driers
US3085348A (en) * 1957-01-23 1963-04-16 Oxy Catalyst Inc Lint remover for fabric dryer
US3110572A (en) * 1959-03-24 1963-11-12 Albert Ag Chem Werke Process and apparatus for granulating and drying particles
US3177592A (en) * 1959-08-07 1965-04-13 Meyer Arnfried Apparatus for treating textile goods

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2067506A (en) * 1936-05-11 1937-01-12 Frank V Silva Casein drier
US2361297A (en) * 1941-12-26 1944-10-24 Alfred P Kutsche Rotary garment drier
US2704896A (en) * 1954-02-09 1955-03-29 Lionel P Hopkins Clothes driers
US3085348A (en) * 1957-01-23 1963-04-16 Oxy Catalyst Inc Lint remover for fabric dryer
US3110572A (en) * 1959-03-24 1963-11-12 Albert Ag Chem Werke Process and apparatus for granulating and drying particles
US3177592A (en) * 1959-08-07 1965-04-13 Meyer Arnfried Apparatus for treating textile goods

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0828977A4 (de) * 1995-05-17 2000-06-14 Mallinckrodt Medical Inc Aggressive konvektionstrocknung in einem rührgefässtrockner
EP0828978A4 (de) * 1995-05-17 2000-06-28 Mallinckrodt Medical Inc Agressive konvektionstrocknung in einem nutschenfilter/-trockner
US5899391A (en) * 1997-11-17 1999-05-04 Hudnut Industries Inc. Cyclonic processing system
US6105888A (en) * 1997-11-17 2000-08-22 Hudnut Industries Inc. Cyclonic processing system
CN108369063A (zh) * 2015-12-18 2018-08-03 百旺公司 控制用于减湿和/或干燥的装置的方法和系统
CN106168450A (zh) * 2016-08-11 2016-11-30 爱森（中国）絮凝剂有限公司 一种降低粉末原料含水率的化工生产设备

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