US3918585A - Screen device for pneumatic transport equipment - Google Patents

Screen device for pneumatic transport equipment Download PDF

Info

Publication number
US3918585A
US3918585A US396159A US39615973A US3918585A US 3918585 A US3918585 A US 3918585A US 396159 A US396159 A US 396159A US 39615973 A US39615973 A US 39615973A US 3918585 A US3918585 A US 3918585A
Authority
US
United States
Prior art keywords
screen
transfer pipe
source
air
screen device
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
US396159A
Other languages
English (en)
Inventor
Clas Hjalmar Hagelstam
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.)
Karl Fazer Oy AB
Original Assignee
Karl Fazer Oy AB
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 Karl Fazer Oy AB filed Critical Karl Fazer Oy AB
Application granted granted Critical
Publication of US3918585A publication Critical patent/US3918585A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
    • B65G53/00—Conveying materials in bulk through troughs, pipes or tubes by floating the materials or by flow of gas, liquid or foam
    • B65G53/34—Details
    • B65G53/58—Devices for accelerating or decelerating flow of the materials; Use of pressure generators
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
    • B07B7/00—Selective separation of solid materials carried by, or dispersed in, gas currents
    • B07B7/06—Selective separation of solid materials carried by, or dispersed in, gas currents by impingement against sieves

Definitions

  • a screen device for fine-grain materials for use in 1 easrc '1 pneumatic transport equipment comprises H 13 2 3- screen means inside a transfer pipe and means in the 58 portion of said transfer pipe upstream of said screen means for blowing additional air into said transport [56] References Cited pipe.
  • the subject of the present invention is a screen device for fine-grain materials, such as flour, to be used in pneumatic transport equipment, which screen device consists of a screen arranged inside the transport pipe.
  • the known equipment described above is complicated and expensive, because it usually comprises two compressors, an intermediate tank with possible cyclone, and a feeding lock. Since the flour passes through the screen only by means of the force of gravitation, the screen area must be made very large in order to reach a satisfactory degree of passing through.
  • the present invention is based on the idea, according to which the blocking of the screen is prevented by making use of this phenomenon. This has been achieved in the screen device in accordance with the invention mainly so that the portion of the transfer pipe upstream of the screen has equipment for blowing additional air into the interior of the said portion.
  • FIG. 1 shows a schematic view of a pneumatic transport equipment
  • FIG. 2 shows a side view of the screen device in partial section.
  • FIG. 1 shows compressor 1 and the outgoing pneumatic transfer pipe 2, which is connected with a feeding lock 3 and a screen device 4.. Before the feeding lock a by-passing pipe 5 is branched from the transfer pipe to the screen device 4.
  • the screen device 4 consists of two funnels 6 and 7, placed one opposite the other, between which there is a screen 8.
  • the funnel 6 of the inlet direction has an annular air space 9, from which holes 10 in the funnel wall provide passage into the funnel.
  • the air space 9 is connected with the by-passing pipe 5 through a cock 11.
  • the transport equipment operates as follows:
  • the compressor 1 feeds air, for example at an overpressure of 1 kg per square cm, into the transfer pipe 2, into which the material to be transferred is at the same time also being fed from the feeding lock 3.
  • the material passes into the screen device 4, in which air as added into same by means of the by-passing pipe 5, the air space 9 and the holes 10.
  • the material is fluidized and sufficiently small particles easily pass through the screen 8 without blocking it.
  • Particles larger than the mesh of the screen remain in the funnel 6 and can be removed by providing the pipe 2 with two screen devices 2, arranged in parallel (not shown) and which are alternatingly connected to the pipe. When one screen device is connected to the pipe, the other one is at the emptying pipe for removal of the large particles from the screen device. In such a case the transfer of flour need not be interrupted during cleaning of the screen devices.
  • the larger particles collected in the screen can be removed through a removal pipe provided with a blocking plate. This can take place always when material is not being transferred in the pneumatic transport equipment, thus, for example, after the transfer of the contents of each container of a truck if transfer of flour from a transport truck into a tank is concerned.
  • additional air can be introduced in the funnel 6 in many ways, for example through a nozzle introduced in the funnel or through a porous wall that allows air to pass through and that is positioned at the holes 10.
  • the emptying can, moreover, be made automatic by combining the operation of the feeding lock 3 with the operation of the locking plate of the removal pipe as con trolled by a clock or by a tachometer.
  • the funnels 6 and 7 have the shape of a funnel, but they can be, for example, straight pipes whose diameter is constant.
  • a screen device for fine-grain materials, especially flour, to be used in pneumatic transport equipment comprising:
  • a transfer pipe connected to said source of pneumatic pressure; means connected to said transfer pipe for feeding said material into said transfer pipe in order to transport said material along the pipe entrained in a flow of air from said source;
  • stationary means connected to a source of compressed air and defining an array of small apertures, which array extends completely around the interior ofa portion of the transfer pipe located immediately upstream of the screen to form a multiplicity of small, closely spaced air streams in order to mix effectively substantially all of said fine-grain material moving towards said screen with the air of said streams thereby to fluidize the fine-grain material, the pressure of the air of the streams being substantially the same as the transport pressure of said flow of air.
  • a screen device in accordance with claim 1, wherein the stationary means include means defining an annular air space which surrounds said portion of the transfer pipe and is connected to said source of compressed air.
  • apertures are formed in a wall of said portion and communicate with said annular air space.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Air Transport Of Granular Materials (AREA)
  • Combined Means For Separation Of Solids (AREA)
US396159A 1972-09-12 1973-09-11 Screen device for pneumatic transport equipment Expired - Lifetime US3918585A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FI722508A FI48684C (fi) 1972-09-12 1972-09-12 Pneumaattisissa siirtolaitteistoissa käytettävä seulalaite

Publications (1)

Publication Number Publication Date
US3918585A true US3918585A (en) 1975-11-11

Family

ID=8507214

Family Applications (1)

Application Number Title Priority Date Filing Date
US396159A Expired - Lifetime US3918585A (en) 1972-09-12 1973-09-11 Screen device for pneumatic transport equipment

Country Status (14)

Country Link
US (1) US3918585A (xx)
JP (1) JPS49100649A (xx)
AR (1) AR200281A1 (xx)
AU (1) AU474483B2 (xx)
BE (1) BE804773A (xx)
BR (1) BR7307078D0 (xx)
CA (1) CA979850A (xx)
DE (1) DE2345678A1 (xx)
DK (1) DK131550B (xx)
FI (1) FI48684C (xx)
FR (1) FR2198794B1 (xx)
GB (1) GB1414882A (xx)
IT (1) IT993166B (xx)
NL (1) NL7312577A (xx)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4213855A (en) * 1974-01-23 1980-07-22 Bennigsen Mackiewicz A Von Sifting equipment for fine-grained bulk material, particularly flour
US4249655A (en) * 1979-06-29 1981-02-10 The United States Of America As Represented By The Secretary Of Agriculture Cyclone dust analyzer for determining microdust content in fibers
US4769127A (en) * 1985-09-30 1988-09-06 Amoco Corporation Computerized monorail catalyst handling process and system for resid hydrotreating units
US5908115A (en) * 1994-05-27 1999-06-01 Montell North America, Inc. Method and apparatus for the classification of solid particles
US20060163118A1 (en) * 2005-01-26 2006-07-27 Eastman Kodak Company Particulate separation processes and apparatus
CN101857145A (zh) * 2010-06-11 2010-10-13 恩华特远东有限责任公司 用于气力垃圾输送系统的旋转屏
CN109046694A (zh) * 2018-09-17 2018-12-21 长沙开元仪器有限公司 一种研磨式粉碎机
US20200255233A1 (en) * 2017-09-29 2020-08-13 Mitsubishi Chemical Engineering Corporation Pipe for transport of granular matter and granular matter transport method
CN114101065A (zh) * 2022-01-26 2022-03-01 山东街景智能制造科技股份有限公司 一种粉状净水料气流筛分装置

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BR7602976A (pt) * 1975-05-16 1977-05-31 Mogensen Frederik Kb & Co Processo para concentracao e separacao simultanea,segundo o tamanho das particulas,de um conjunto de particulas heterogeneas em diferentes grupos
DK159867C (da) * 1980-01-04 1991-05-21 Icab Ind Coating Ab Elektrostatisk pulversproejteaggregat
FR2517570A1 (fr) * 1981-12-04 1983-06-10 Ashland Chemical France Sa Procede de separation de particules de masses differentes et separateur de particules
GB2123783B (en) * 1982-07-21 1985-10-23 Linder Hermann J Feeding pressure medium into a conveyors pipeline
JP2527105Y2 (ja) * 1989-04-21 1997-02-26 繁雄 林田 図柄の消えるパズル
DE4223924A1 (de) * 1992-07-21 1994-01-27 Erwin Schulze Vorrichtung zur Beschleunigung des Transports von durch ein Medium, z. B. Luft in einer Rohrleitung geförderten Schüttgütern, z. B. Flugasche
US10926296B2 (en) 2014-04-01 2021-02-23 Bühler AG Screen device for unloading silo vehicles
CN111318454A (zh) * 2018-12-13 2020-06-23 中国石油化工股份有限公司 一种过滤稀相气力输送粗对苯二甲酸产品中颗粒杂质的方法
CN112604959A (zh) * 2020-12-07 2021-04-06 美巢集团股份公司 粉料筛分装置

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US90097A (en) * 1869-05-18 Improved apparatus for purifying-, screening
US550911A (en) * 1895-12-03 John corey fell
US849225A (en) * 1906-04-06 1907-04-02 Louis Gans Apparatus for separating chaff from coffee.
US1211736A (en) * 1915-11-01 1917-01-09 David E Marshall Apparatus for disintegrating shavings.
US1272682A (en) * 1914-03-30 1918-07-16 Adolph W H Lenders Method of producing dustless starch.
US1530193A (en) * 1923-03-15 1925-03-17 Henry S Montgomery Screening machine
US1573373A (en) * 1926-02-16 Carbon industries
US2874840A (en) * 1954-09-24 1959-02-24 Columbian General Blacks Ltd Methods of separating or classifying materials
US2910731A (en) * 1956-10-30 1959-11-03 Vernon P Moore Textile fiber sorter
US3254766A (en) * 1963-03-28 1966-06-07 Procter & Gamble Apparatus and method for sifting particulate bulk material
US3685651A (en) * 1969-12-18 1972-08-22 Clarence R Gruber Particle cleaning apparatus

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1102650B (de) * 1955-10-31 1961-03-16 Westin & Backlund Ab Pneumatischer Foerderer zum Foerdern von Massenguetern mittels Druckluft aus einem Behaelter in eine Rohrleitung
FR1177528A (fr) * 1956-06-25 1959-04-27 Procédé et dispositif pour le transport de produits farineux ou pulvérulents dans des canalisations tubulaires ou des conduits de transport pneumatique
CH355017A (de) * 1957-12-13 1961-06-15 Mettler E Fabrik Fuer Analysenwaagen Siebvorrichtung, insbesondere zum Sieben von trockenen staubförmigen Substanzen
US3421619A (en) * 1967-03-08 1969-01-14 Gen Electric Method and means for separating individual fibers from a fibrous mass
DE1757516A1 (de) * 1968-05-17 1972-02-17 Vni I Pk I Avtom Predpriaty Pr Einrichtung zum Sieben von pulverigem Gut

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US90097A (en) * 1869-05-18 Improved apparatus for purifying-, screening
US550911A (en) * 1895-12-03 John corey fell
US1573373A (en) * 1926-02-16 Carbon industries
US849225A (en) * 1906-04-06 1907-04-02 Louis Gans Apparatus for separating chaff from coffee.
US1272682A (en) * 1914-03-30 1918-07-16 Adolph W H Lenders Method of producing dustless starch.
US1211736A (en) * 1915-11-01 1917-01-09 David E Marshall Apparatus for disintegrating shavings.
US1530193A (en) * 1923-03-15 1925-03-17 Henry S Montgomery Screening machine
US2874840A (en) * 1954-09-24 1959-02-24 Columbian General Blacks Ltd Methods of separating or classifying materials
US2910731A (en) * 1956-10-30 1959-11-03 Vernon P Moore Textile fiber sorter
US3254766A (en) * 1963-03-28 1966-06-07 Procter & Gamble Apparatus and method for sifting particulate bulk material
US3685651A (en) * 1969-12-18 1972-08-22 Clarence R Gruber Particle cleaning apparatus

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4213855A (en) * 1974-01-23 1980-07-22 Bennigsen Mackiewicz A Von Sifting equipment for fine-grained bulk material, particularly flour
US4249655A (en) * 1979-06-29 1981-02-10 The United States Of America As Represented By The Secretary Of Agriculture Cyclone dust analyzer for determining microdust content in fibers
US4769127A (en) * 1985-09-30 1988-09-06 Amoco Corporation Computerized monorail catalyst handling process and system for resid hydrotreating units
US5908115A (en) * 1994-05-27 1999-06-01 Montell North America, Inc. Method and apparatus for the classification of solid particles
CN1054782C (zh) * 1994-05-27 2000-07-26 蒙特尔北美公司 固体颗粒分级的方法和装置
US20080237094A1 (en) * 2005-01-26 2008-10-02 Kelsey Jeffery P Particulate separation processes and apparatus
US20060163118A1 (en) * 2005-01-26 2006-07-27 Eastman Kodak Company Particulate separation processes and apparatus
CN101857145A (zh) * 2010-06-11 2010-10-13 恩华特远东有限责任公司 用于气力垃圾输送系统的旋转屏
CN101857145B (zh) * 2010-06-11 2012-12-12 恩华特远东有限责任公司 用于气力垃圾输送系统的旋转屏
US20200255233A1 (en) * 2017-09-29 2020-08-13 Mitsubishi Chemical Engineering Corporation Pipe for transport of granular matter and granular matter transport method
US10947064B2 (en) * 2017-09-29 2021-03-16 Mitsubishi Chemical Engineering Corporation Pipe for transporting powder and method for transporting powder
CN109046694A (zh) * 2018-09-17 2018-12-21 长沙开元仪器有限公司 一种研磨式粉碎机
CN114101065A (zh) * 2022-01-26 2022-03-01 山东街景智能制造科技股份有限公司 一种粉状净水料气流筛分装置
CN114101065B (zh) * 2022-01-26 2022-05-13 山东街景智能制造科技股份有限公司 一种粉状净水料气流筛分装置

Also Published As

Publication number Publication date
FI48684B (xx) 1974-09-02
CA979850A (en) 1975-12-16
DK131550B (da) 1975-08-04
FR2198794A1 (xx) 1974-04-05
JPS49100649A (xx) 1974-09-24
BR7307078D0 (pt) 1974-06-27
AR200281A1 (es) 1974-10-31
FI48684C (fi) 1974-12-10
DK131550C (xx) 1975-12-29
AU474483B2 (en) 1976-07-22
AU6023673A (en) 1975-03-13
DE2345678A1 (de) 1974-03-28
NL7312577A (xx) 1974-03-14
FR2198794B1 (xx) 1977-08-12
BE804773A (fr) 1974-01-02
GB1414882A (en) 1975-11-19
IT993166B (it) 1975-09-30

Similar Documents

Publication Publication Date Title
US3918585A (en) Screen device for pneumatic transport equipment
US3069205A (en) Conveying of solids
EP1776301B1 (de) Vorrichtung und verfahren zur pneumatischen beförderung von schüttgütern im dichtstromverfahren
US2794686A (en) Air flow conveying system
US8702849B2 (en) Dust screen and method for dry bulk storage units
US4823989A (en) Compartmentalized pneumatic vessel filtering and unloading system
US20080073895A1 (en) Portable storage apparatus for granular material
CA1101380A (en) Constant vacuum barge unloading system
US3829165A (en) Anti-stoppage apparatus and method for air conveying systems
US4165133A (en) Material handling system for wide range of materials and flow rates
US3393943A (en) Apparatus and methods for fluidizing granular or pulverate materials
US4000061A (en) Particulate dry product loading apparatus
US5518343A (en) Dust-free powder substance delivery and filter system
US3246805A (en) Hopper structure
US2769544A (en) Material trap
US3376696A (en) Gas filtering apparatus
US2915338A (en) Conveying apparatus
DK141684B (da) Pneumatisk sugetransportanlaeg til forsyning af flere brugere
US2813630A (en) Material trap
US2915337A (en) Discharge means for storage receptacles
US3173725A (en) Pneumatic conveyor structure
US3343886A (en) Hopper structure
JP2589887B2 (ja) 高炉ガス乾式集塵設備のダスト排出方法および装置
SU1752451A1 (ru) Технологический комплекс дл воздушно-сухого обогащени сыпучих материалов
GB2116064A (en) Improvements in or relating to particle sizing systems for fluidised beds