DE475404C - Speed sifter for the separation of fine and coarse grain by means of an air stream - Google Patents

Speed sifter for the separation of fine and coarse grain by means of an air stream

Info

Publication number
DE475404C
DE475404C DEW76532D DEW0076532D DE475404C DE 475404 C DE475404 C DE 475404C DE W76532 D DEW76532 D DE W76532D DE W0076532 D DEW0076532 D DE W0076532D DE 475404 C DE475404 C DE 475404C
Authority
DE
Germany
Prior art keywords
sifter
fine
separation
air stream
coarse grain
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
Application number
DEW76532D
Other languages
German (de)
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
Publication date
Priority to DEW76532D priority Critical patent/DE475404C/en
Application granted granted Critical
Publication of DE475404C publication Critical patent/DE475404C/en
Expired legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D45/00Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces
    • B01D45/02Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by utilising gravity
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D46/00Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/10Particle separators, e.g. dust precipitators, using filter plates, sheets or pads having plane surfaces
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B07SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07BSEPARATING 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
    • B07B4/00Separating solids from solids by subjecting their mixture to gas currents
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D2275/00Filter media structures for filters specially adapted for separating dispersed particles from gases or vapours
    • B01D2275/20Shape of filtering material
    • B01D2275/203Shapes flexible in their geometry, e.g. bendable, adjustable to a certain size

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Characterised By The Charging Evacuation (AREA)

Description

Geschwindigkeitssichter zur TreÜung von Fein- und Grobkorn inittels Luftstroms Für die Sichtung von Feinmehl aus Grobgut sind bisher vorwiegend sogenannte Zentrifugal-Streutellersichter in Anwendung gewesen. Neuerdings 2 geht - man besonders in der Kohlenmüllerei dazu über, Geschwindigkeitssichter zu verwenden, d. h. Einrichtungen, bei denen eine bestimmte Luftmenge von bestimmter Geschwindigkeit einen von Blech eingeschlossenen Raum durchstreicht. Geschwindigkeit, Luftmenge und Unterdruck bedingen die Größe des Kornes, das als Fertiggut durch den Sichtraum gehoben werden soll. Da für verschiedene Verwendungszwecke das Fertigkorn auch von wechselnder Größe sein muß, strebt man eine Regelbarkeit der Sichter an. Das einfachste Mittel ist bisher, die Luftmenge des Gebläses zu verändern, wodurch naturgemäß auch die Geschwindigkeit in dem Sichter eine andere wird. Da je- doch die Druckverhältnisse in dem Luftumwälzungssystern damit ebenfalls andere werden, erwies es sich als notwendig, durch Re-"elbarkeit des Sichtergehäuses die Sicht arbeit zu verfeinern. Es wurden schlecht zu-U wer ausführhare und teure "ängliche, sch Sichter geschaffen, die mehr oder weniger auf Erfahrung aufgebaut waren, so daß der gewünschte Erfolg sehr oft ausblieb. Dies lag in der Hauptsache daran, daß sich mechanischeEinrichtungen nicht p# schaffen lassen, die bei genügender Betriebssicherheit und Zugänglichkeit so einstellbar sind, daß bei wechselnder Korngröße und Kornschwere die gewünschten Verhältnisse erreicht werden. Als besonderer Mangel hat sich herausgestellt, (laß bei veränderlichem Ouerschnitt nur sehr schwer auch die Höhe ä-es Sichtraumes verändert werden kann. So war es nicht möglich, bei spezifisch schwerem Sichtgut den notwendigen Weg zur Sichtung zu erhalten. Vorliegende Erfindung sucht nun den an-,gedeuteten Schwierigkeiten in verhältnismäßig einfacher Weise abzuhelfen. Zu diesem Zwecke wird der Sichtraum ganz oder teilweise von Gummiwänden oder -ähnlichen ausdehnbaren Stoffen eingeschlossen, so daß er in senkrechter und wagerechter Richtung leicht ausgedehnt werden kann. Paragummii ist den in Frage kommenden Beanspruchungen in jeder Hinsicht gewachsen und seine Abnutzung ist vielfach geringer als die Abnutzung von Blech.Speed sifter for fine and coarse grain in means of air flow For the sifting of fine flour from coarse material, so-called centrifugal spreading plate sifters have so far been predominantly in use. Recently, two passes - one to use, especially in the Kohlenmüllerei to about speed separator, d. H. Facilities in which a certain amount of air passes through a space enclosed by sheet metal at a certain speed. Speed, air volume and negative pressure determine the size of the grain that is to be lifted through the classifying area as finished goods. Since the finished grain must also be of varying size for different purposes, the aim is to control the sifter. The simplest means so far has been to change the amount of air in the fan, which naturally also changes the speed in the sifter. However, since the pressure conditions in the air circulation system are also different, it has been found necessary to refine the visibility work through the controllability of the separator housing. which were more or less based on experience, so that the desired success very often failed to materialize. This was mainly due to the fact that mechanical devices cannot be created which, with sufficient operational reliability and accessibility, can be adjusted in such a way that the desired ratios are achieved with changing grain size and grain weight. It has turned out to be a particular defect (if the cross-section changes, the height of the viewing area can only be changed with great difficulty. Thus, it was not possible to obtain the necessary way to sift through specifically heavy items. The present invention seeks that For this purpose, the viewing area is completely or partially enclosed by rubber walls or similar expandable materials, so that it can easily be expanded in the vertical and horizontal direction And its wear and tear is much less than that of sheet metal.

Der Erfindungsgegenstand ist in der Zeichnung schematisch dargestellt.The subject of the invention is shown schematically in the drawing.

Der Gummisichter a ist am Einlaßrohr b und an dem Auslaßrohr c befestigt. Die verschiedenen punktierten Linien deuten die Lagen an, die der Sichter durch Ausdehnung annehmen kann. Die Mittel zur Ausdehnung bzw. zum Spannen des Sichters können sehr inanni faltig sein. Vorzugsweise -wird um g t, den Sichter ein Gerüst aufgebaut, an dem die Z, mit den Gummiwänden zusammenhängenden Vorrichtungen zum Spannen der Wände angebracht sind, so daß der Querschnitt des Sichtraums in senkrechter oä-er in wagerechter Richtung oder auch in beiden Richtungen nach Bedarf geändert werden kann. Einlaßrohr b und Auslaßrohr c sind gegeneinander be.wegbar.The rubber sifter a is attached to the inlet pipe b and the outlet pipe c. The various dotted lines indicate the positions that the sifter can assume through expansion. The means for expanding or tensioning the sifter can be very wrinkled. Preferably -is to g t, built up a scaffolding the classifier, where the Z, are attached with the rubber walls contiguous devices for tensioning of the walls, so that the cross section of the viewing space in a vertical OAE he according to dare right direction or in both directions Can be changed as required. Inlet pipe b and outlet pipe c are movable against each other.

Claims (1)

PATENTANSPRUCH. Geschwindigkeitssichter zur Trennung von Fein- und Grobkorn mittels Luftstroms, dadurch gekennzeichnet, daß der Sichtra-um teilweise oder ganz aus Gummi oder einem anderen dehnbaren Stoff hergestellt ist, so daß der Querschnitt sowie die Höhe des. Sichte rs veränderlich sind. PATENT CLAIM. Speed sifter for the separation of fine and coarse grain by means of an air stream, characterized in that the sifting area is partially or entirely made of rubber or another elastic material, so that the cross-section and the height of the sifter can be changed.
DEW76532D Speed sifter for the separation of fine and coarse grain by means of an air stream Expired DE475404C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEW76532D DE475404C (en) Speed sifter for the separation of fine and coarse grain by means of an air stream

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEW76532D DE475404C (en) Speed sifter for the separation of fine and coarse grain by means of an air stream

Publications (1)

Publication Number Publication Date
DE475404C true DE475404C (en) 1929-04-24

Family

ID=7610157

Family Applications (1)

Application Number Title Priority Date Filing Date
DEW76532D Expired DE475404C (en) Speed sifter for the separation of fine and coarse grain by means of an air stream

Country Status (1)

Country Link
DE (1) DE475404C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1272094B (en) * 1962-12-15 1968-07-04 Industrieanlagen Ges Mit Besch Cyclone construction swirler for separating dust from gases, in particular from top gases from blast furnaces or other shaft furnaces

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1272094B (en) * 1962-12-15 1968-07-04 Industrieanlagen Ges Mit Besch Cyclone construction swirler for separating dust from gases, in particular from top gases from blast furnaces or other shaft furnaces

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