EP0533881A1 - Method of supplying air for purifying semolina, and a semolina-purifying machine. - Google Patents

Method of supplying air for purifying semolina, and a semolina-purifying machine.

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Publication number
EP0533881A1
EP0533881A1 EP92907745A EP92907745A EP0533881A1 EP 0533881 A1 EP0533881 A1 EP 0533881A1 EP 92907745 A EP92907745 A EP 92907745A EP 92907745 A EP92907745 A EP 92907745A EP 0533881 A1 EP0533881 A1 EP 0533881A1
Authority
EP
European Patent Office
Prior art keywords
air
semolina
cleaning machine
machine according
sieve
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
EP92907745A
Other languages
German (de)
French (fr)
Other versions
EP0533881B1 (en
Inventor
Roman Mueller
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.)
Buehler AG
Original Assignee
Buehler AG
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Publication date
Application filed by Buehler AG filed Critical Buehler AG
Publication of EP0533881A1 publication Critical patent/EP0533881A1/en
Application granted granted Critical
Publication of EP0533881B1 publication Critical patent/EP0533881B1/en
Anticipated expiration legal-status Critical
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Classifications

    • 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
    • B07B11/00—Arrangement of accessories in apparatus for separating solids from solids using gas currents
    • B07B11/02—Arrangement of air or material conditioning accessories
    • 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
    • B07B4/00—Separating solids from solids by subjecting their mixture to gas currents
    • B07B4/08—Separating solids from solids by subjecting their mixture to gas currents while the mixtures are supported by sieves, screens, or like mechanical elements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02B—PREPARING GRAIN FOR MILLING; REFINING GRANULAR FRUIT TO COMMERCIAL PRODUCTS BY WORKING THE SURFACE
    • B02B1/00—Preparing grain for milling or like processes
    • B02B1/02—Dry treatment
    • 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
    • B07B9/00—Combinations of apparatus for screening or sifting or for separating solids from solids using gas currents; General arrangement of plant, e.g. flow sheets
    • B07B9/02—Combinations of similar or different apparatus for separating solids from solids using gas currents

Definitions

  • the invention relates to a method for air guidance for cleaning semolina and a semolina cleaning machine, the material being cleaned via a plurality of oscillatingly mounted sieve layers forming a cleaning compartment and via product discharges for the sieve rejection and under the sieve layers with a plurality of adjustable discharge nozzles for the transfer of the Sieve diarrhea is separated into the desired fractions in two or more collecting channels.
  • the semolina cleaning machine has become a main machine, which together have the characteristic features of milling technology. These are:
  • the usual sieving process works without air through the sieve; in contrast, a fluid bed with a strong air flow is created in such a way that the material assumes a fluid-like, flowable state.
  • Very specific laws apply in the fluidized bed, whereby the separation into large and small parts is only the best known effect.
  • the main task of the semolina cleaning machine is the extraction of semolina and haze, various granulations and the reading out of all shell parts, which have a darker, often brownish color. Furthermore, with the semolina cleaning machine, grinding products with different qualitative properties can be separated.
  • German patent no. 29 181 from 1884 a semolina cleaning machine with a completely closed system has become known.
  • a twin fan sucks the air out of the machine head, which has filter cloth cleaning, and guides it back along the product collection area to the lower side of the screen.
  • there is only a very poor control option for the operation of the semolina cleaning machine which would no longer be suitable, especially with cleaning compartments having multiple sieve layers.
  • Milling by milling in the sense of modern high-level milling, has the special feature that not only a certain granulation has to be achieved, but that there are a number of important points to be observed, particularly with regard to the regrind: -
  • the starch grain must not be mechanically damaged for semolina products that are intended for the pasta industry, otherwise the pasta quality will deteriorate.
  • the glue for baking flour for example, must not be damaged by local heat.
  • the object of the invention was now to improve the cleaning of semolina in relation to ventilation technology and hygiene, but to improve it while maintaining all the essential advantages of the modern open concepts.
  • the method according to the invention is characterized in that the exhaust air from at least two cleaning compartments is collected in an air discharge line and sucked off via a separately arranged aspiration, cleaned and returned as supply air via a supply channel under each of the screen layers.
  • the new invention further relates to a semolina cleaning machine with a plurality of vibratingly mounted sieve layers, air supply and air discharge of a product feed, a product discharge for the sieve rejection and, under the sieve layers, a product collecting floor with a plurality of adjustable discharge nozzles for the transfer of the sieve diarrhea into two or more collecting channels and is thereby characterized in that the product collecting floor, with an air supply duct extending over its length, forms a diarrhea chamber which closes off to the outside and, together with the sieve layers, forms an oscillating unit. Self-cleaning results in particular from the fact that the air supply duct is part of the vibration unit.
  • the air supply duct can, if several semolina cleaning compartments.
  • the air supply duct is connected directly as an air return duct of a circulating air system, or in the case of a single machine without circulating air, the fresh air in the area of the machine upper part, preferably at an end part of the semolina cleaning machine, is sucked in via an air grille, i.e. no longer from the floor area as until now.
  • the discharge nozzles for the product are preferably arranged on the collecting base and have throttles.
  • the collecting troughs are designed as vibrating troughs, the throttles preferably being designed to be adjustable in cross section.
  • the screen layers, together with the collecting base and the collecting troughs, can each have their own vibratory drive, the collecting troughs preferably also being formed as closed channels and having transparent removal flaps for product samples on the top in the longitudinal direction.
  • the air supply duct be arranged over the length of the screen layers and approximately in the central region of the screen layer. In this way, the entire area above the sieves remains free for window elements for visual inspection of the fluid bed.
  • Another particularly advantageous embodiment is to arrange a plurality of air quantity adjustment flaps between the air supply duct and the diarrhea.
  • the air inlet for the air supply duct can be arranged on one end side of the semolina cleaning machine and the supply duct approximately at the same height as the sieve position.
  • the adjustment flaps are on the pressure side of the system.
  • FIG. 1 shows a longitudinal section through a semolina cleaning machine
  • FIG. 4 shows a schematic suction side and suction side in combination with circulating air
  • FIG. 5 shows a group of 3 semolina cleaning machines analogous to FIG. 4;
  • FIG. 6 shows a longitudinal view of the semolina cleaning machine.
  • a semolina cleaning machine 1 is supported on a bracket 2 and has a fixed head part 3.
  • the material is fed in via a product inlet 4 and an inlet cascade, and is passed directly to the uppermost sieve layer 5 'of the sieves 5.
  • the screens 5 are vibrated together by a vibration exciter 30.
  • the material obtained via the sieve layers 5 1 , 5 '', 5 * '' as a push-off at the low-lying end is conveyed via product discharge channels 6 ', 6'',6''* and in FIG. 1 via a common product discharge channel 6 derived.
  • the sieve diarrhea arrives at a product collecting tray 7 and through a plurality of transfer channels 8, 8 ', 8 "etc.
  • the semolina cleaning machine is by two identical machines or as a double machine ne is shown, as is common for semolina cleaning machines. It is essential, however, that the air supply duct 18 is provided in two, for a targeted control or air flow for each half of the machine. In the case of recirculated air, however, the air supply and route are common.
  • the transition from the air supply duct 18 to the diarrhea chamber 19 is by air regulating slide 20 via handwheels 21.
  • the fixed head part 3 is held on a central support 2 '.
  • Each cleaning compartment with sieve layers 5, product collecting base 7 and air supply duct 18 forms a vibrating unit, which can be connected as a double unit and is connected to the fixed machine parts via flexible sleeves 33.
  • the product flow from each individual transfer channel 8, 8 ! , 8 '' etc. can either be directed into the collecting channel 9 or into the collecting channel 9 '. This can be done by swiveling to the right on the left machine or to the left on the right machine.
  • a product sample can be removed from the respective transfer channel by opening removal flaps 23.
  • FIG. 3 shows the air flow from the diarrhea space 19 through the sieve layers 5 ', 5 1 ', 5 111 and an air extraction space 24.
  • FIG. 4 combines FIGS. 2 and 3, ie represents 2 different cuts, the air discharge on the left and the air supply of a semolina cleaning machine on the right.
  • FIG. 5 basically shows 3 semolina cleaning machines, each shown as a double machine, the air discharge in the upper half of the picture, the air supply to the same machines in the lower half of the picture.
  • FIG. 5 also shows a dust filter 25 and an exhaust air line 26 with a controllable throttle valve 27 for regulating the air pressure conditions in the system.
  • the inventive solution also allows a traditional mode of operation as far as air extraction is concerned.
  • the air intake can, however, as indicated by arrows 30, 31, 32, take place from the upper room, that is, no longer from below, from the area near the floor, which normally has a higher level of dust or bacteria.
  • an air intake grille is attached at the appropriate point.

Abstract

PCT No. PCT/CH92/00071 Sec. 371 Date Dec. 11, 1992 Sec. 102(e) Date Dec. 11, 1992 PCT Filed Apr. 4, 1992 PCT Pub. No. WO92/18257 PCT Pub. Date Oct. 29, 1992.A semolina cleaning apparatus allows basic operations as in the prior art with complete visual surveillance of operation, but with an outwardly closed product guidance. In this way, entry and exit of dust is completely prevented during normal operation as well as when removing samples. Accordingly, it is possible to operate an individual apparatus as well as an entire group of semolina cleaning apparatuses with circulating air. The air intake can be effected from above.

Description

Verfahren zur uftführung für das Putzen von Griessen sowie Griessputzmaschine Process for air guidance for cleaning semolina and semolina cleaning machine
Technisches GebietTechnical field
Die Erfindung betrifft ein Verfahren zur Luftführung für das Putzen von Griessen sowie eine Griessputzmaschine, wobei das Gut über mehrere schwingfähig gelagerte, ein Putzabteil bildende, Sieblagen gereinigt und über Produktabführungen für den Siebabstoss sowie unter den Sieblagen mit einer Vielzahl von einstellbaren Ableitstutzen für die Überführung des Siebdurchfalles in zwei oder mehrere Sammelrinnen in die gewünschten Fraktionen getrennt wird.The invention relates to a method for air guidance for cleaning semolina and a semolina cleaning machine, the material being cleaned via a plurality of oscillatingly mounted sieve layers forming a cleaning compartment and via product discharges for the sieve rejection and under the sieve layers with a plurality of adjustable discharge nozzles for the transfer of the Sieve diarrhea is separated into the desired fractions in two or more collecting channels.
Stand der TechnikState of the art
Die Griessputzmaschine ist neben dem Walzenstuhl und dem Plansichter zu einer Hauptmaschine geworden, welche gemeinsam die charakteristischen Merkmale der Müllerei¬ verfahrenstechnik aufweisen. Es sind dies:In addition to the roller mill and the plan sifter, the semolina cleaning machine has become a main machine, which together have the characteristic features of milling technology. These are:
- ein offener Prozessablauf mit Sicht auf das Produkt in den jeweiligen Behandlungsstufen;- an open process flow with a view of the product in the respective treatment stages;
- die Möglichkeit innerhalb der kritischen Arbeitsab¬ läufe Produktmuster zur sensorisehen Bewertung oder für eine analytische Prüfung entnehmen zu können;the possibility of being able to take product samples for sensor evaluation or for an analytical test within the critical work processes;
- dem Müller Korrekturen bezüglich der Maschinen¬ einstellung und des Produktflusses zu ermöglichen. In der Griessputzmaschine werden das Prinzip des Fliessbettes einerseits, sowie die klassische Siebung andererseits, mit einer Schüttelbewegung des Siebes, kombiniert.- to enable the miller to make corrections regarding the machine setting and the product flow. In the semolina cleaning machine, the principle of the fluid bed, on the one hand, and the classic sieving, on the other, are combined with a shaking movement of the sieve.
Der übliche Siebvorgang arbeitet möglichst ohne Luft durch das Sieb; im Gegensatz dazu wird ein Fliessbett mit einer starken Luftströmung erzeugt, derart, dass das Gut einen flüssigkeitsähnlichen, fliessfähigen Zustand annimmt. In dem Fliessbett gelten ganz spezifische Gesetzmässigkeiten, wobei die Trennung nach grossen und kleinen Teilen nur der bekannteste Effekt ist. Die Hauptaufgabe der Griessputzmaschine ist die Gewinnung von Griess und Dunst, von verschiedener Granulation und das Auslesen von allen Schalenteilen, welche eine dunklere, oft bräunliche Färbung aufweisen. Ferner können mit der Griessputzmaschine Mahl-Produkte mit unterschiedlichen qualitativen Eigenschaften abgetrennt werden.The usual sieving process works without air through the sieve; in contrast, a fluid bed with a strong air flow is created in such a way that the material assumes a fluid-like, flowable state. Very specific laws apply in the fluidized bed, whereby the separation into large and small parts is only the best known effect. The main task of the semolina cleaning machine is the extraction of semolina and haze, various granulations and the reading out of all shell parts, which have a darker, often brownish color. Furthermore, with the semolina cleaning machine, grinding products with different qualitative properties can be separated.
In der deutschen Patentschrift Nr. 29 181 aus dem Jahre 1884 ist eine Griessputzmaschine mit einem vollständig geschlossenen System bekannt geworden. Dabei saugt ein Zwillingsventilator die Luft aus dem, eine Filtertuchreinigung aufweisende Maschinenoberteil ab und führt diese längs dem Produktsammeiraum wieder an die untere Seite des Siebes zurück. Gegenüber dem neueren Stand der Technik besteht hier nur eine sehr mangelhafte Kontrollmöglichkeit für die Arbeitsweise der Griessputzmaschine, was besonders bei mehreren Sieblagen aufweisende Putzabteilen nicht mehr tauglich wäre.In German patent no. 29 181 from 1884, a semolina cleaning machine with a completely closed system has become known. A twin fan sucks the air out of the machine head, which has filter cloth cleaning, and guides it back along the product collection area to the lower side of the screen. Compared to the newer state of the art, there is only a very poor control option for the operation of the semolina cleaning machine, which would no longer be suitable, especially with cleaning compartments having multiple sieve layers.
Das müllerische Mahlen, im Sinne der modernen Hochmüllerei, weist die Besonderheit auf, dass nicht nur eine bestimmte Granulation erreicht werden muss, sondern dass ganz besonders in Bezug auf das Mahlgut einige wesentliche Punkte zu beachten sind: - Das Stärkekorn darf für Griess-Produkte, die bestimmt sind für die Teigwarenindustrie nicht mechanisch beschädigt werden, da sonst die Teigwarenqualität verschlechtert wird.Milling by milling, in the sense of modern high-level milling, has the special feature that not only a certain granulation has to be achieved, but that there are a number of important points to be observed, particularly with regard to the regrind: - The starch grain must not be mechanically damaged for semolina products that are intended for the pasta industry, otherwise the pasta quality will deteriorate.
- Der Kleber darf für Backmehle zum Beispiel durch örtliche Hitze nicht beschädigt werden.- The glue for baking flour, for example, must not be damaged by local heat.
- Die äusseren Schalenteile müssen möglichst gross¬ flächig erhalten und ausgesondert werden.- The outer shell parts must be kept as large as possible and separated out.
Die Grossflächigkeit der Schalenteile, im Gegensatz zu der eher kubischen Form der Mehl- und Griessteile, wird nun in der Griessputzmaschine zu deren Auslese ausgenutzt. Das geschieht auf Grund der pysikalischen Kräfte welche in einem geschüttelten Fliessbett die flächigen Teile nach oben drängen, so dass diese als Siebabstoss ausgeschieden werden können. Gesiebt werden in der Griessputzmaschine nur die Mehl- bzw. Griessteile und diese nach der Grosse. Dieser Vorgang ist analog einer Kalibrierung mit dem Ziel eines bestimmten Korngrössenspektrums.The large surface area of the shell parts, in contrast to the more cubic shape of the flour and semolina parts, is now used in the semolina cleaning machine for their selection. This happens due to the physical forces which push the flat parts upwards in a shaken fluid bed so that they can be excreted as sieve rejection. Only the flour or semolina parts are sieved in the semolina cleaning machine and these are sized. This process is analogous to a calibration with the aim of a certain grain size spectrum.
Alle Ansprüche, für die optimale Funktion der Griessputz¬ maschine, werden durch den ganz eigenartigen Konzept¬ aufbau, wie er sich aus den Anfängen vor 100 Jahren entwickelt hat, erfüllt. Die Griessputzmaschine ist denn auch eine Spezialmaschine geworden, die fast ausschliess- lich nur in dem Bereich von Getreidemühlen eingesetzt wird. Jede wesentliche Konzeptänderung müsste eine Än¬ derung der Funktion zur Folge haben. Dies bedeutet, dass in neuester Zeit aufkommende Auflagen wie zum Beispiel das Abschliessen des gesammten Produktflusses gegen aussen, aus hygienischen Gründen, auf vernünftige Art nicht lös¬ bar ist, ohne gleichzeitig die Grundforderung der Offen¬ heit und Zugänglichkeit des Prozesses in Frage zu stellen. Darstellung der ErfindungAll requirements for the optimal functioning of the semolina cleaning machine are met by the very unique concept structure, as it developed from the beginning 100 years ago. The semolina cleaning machine has also become a special machine that is used almost exclusively in the field of grain mills. Any major concept change would have to result in a change in function. This means that recently emerging requirements, such as closing off the entire product flow to the outside, for reasons of hygiene, cannot reasonably be solved without at the same time questioning the basic requirement of openness and accessibility to the process. Presentation of the invention
Der Erfindung wurde nun die Aufgabe gestellt, das Putzen von Griess einen Bezug auf Lufttechnik und Hygiene zu ver¬ bessern, jedoch unter Aufrechterhaltung aller wesentlichen Vorteile der neuzeitlichen offenen Konzepte zu verbessern.The object of the invention was now to improve the cleaning of semolina in relation to ventilation technology and hygiene, but to improve it while maintaining all the essential advantages of the modern open concepts.
Das erfindungsgemässe Verfahren ist dadurch gekennzeichnet, dass die Abluft von wenigstens zwei Putzabteilen in einer Luftabführleitung gesammelt und über eine getrennt angeordnete Aspiration abgesaugt, gereinigt und als Zuluft über je einen Zuführkanal unter die Sieblagen zurückgeführt wird.The method according to the invention is characterized in that the exhaust air from at least two cleaning compartments is collected in an air discharge line and sucked off via a separately arranged aspiration, cleaned and returned as supply air via a supply channel under each of the screen layers.
Überraschenderweise ist es damit gelungen, dass Hauptarbeitsmittel nämlich die Luft bzw. die lufttechniεche Seite wesentlich zu verbessern, indem nicht jedem Putzabteil ein eigenständiges LuftSystem bzw. ReinigungsSystem sondern viel mehr mehreren Putzabteilen ein gemeinsames Luftsystem zuordenbar ist.Surprisingly, it has been possible to significantly improve the main work equipment, namely the air or the ventilation side, by not being able to assign an independent air system or cleaning system to each cleaning compartment, but much more a common air system to more cleaning compartments.
Die neue Erfindung betrifft ferner eine Griessputz¬ maschine mit mehreren schwingfähig gelagerten Sieblagen Luftzu- und Luftabführung einer Produktspeisung einer Produktabführung für den Siebabstoss sowie unter den Sieblagen ein Produktsammeiboden mit einer Vielzahl von einstellbaren Ableitstutzen für die Überführung des Siebdurchfalles in zwei oder mehrere Sammelrinnen und ist dadurch gekennzeichnet, dass der Produktsammeiboden mit einem, sich über dessen Länge erstreckender Luftzuführkanal einen nach aussen abschliessenden Durchfallraum und gemeinsam mit den Sieblagen eine Schwingeinheit bilden. Insbesondere dadurch, dass der Luftzuführkanal Teil der Schwingeinheit ist, ergibt sich eine Selbstreinigung. Der Luftzuführkanal kann, wenn mehrere Griessputzabteile resp. Maschinen gleichzeitig in Betrieb stehen, dem Luftzuführkanal direkt als Luftrückführkanal eines Umluftsystems angeschlossen werden, oder im Falle einer Einzelmaschine ohne Umluft die Frischluft im Bereich des Maschinenoberteil, bevorzugt an einem Endteil der Griess¬ putzmaschine über ein Luftgitter angesaugt werden, also nicht mehr aus dem Bodenbereich wie bisher.The new invention further relates to a semolina cleaning machine with a plurality of vibratingly mounted sieve layers, air supply and air discharge of a product feed, a product discharge for the sieve rejection and, under the sieve layers, a product collecting floor with a plurality of adjustable discharge nozzles for the transfer of the sieve diarrhea into two or more collecting channels and is thereby characterized in that the product collecting floor, with an air supply duct extending over its length, forms a diarrhea chamber which closes off to the outside and, together with the sieve layers, forms an oscillating unit. Self-cleaning results in particular from the fact that the air supply duct is part of the vibration unit. The air supply duct can, if several semolina cleaning compartments. Machines are in operation at the same time, the air supply duct is connected directly as an air return duct of a circulating air system, or in the case of a single machine without circulating air, the fresh air in the area of the machine upper part, preferably at an end part of the semolina cleaning machine, is sucked in via an air grille, i.e. no longer from the floor area as until now.
Die Erfindung erlaubt aber noch eine ganze Reihe von besonders vorteilhaften weiteren Ausgestaltungen. So werden bevorzugt die Ableitstutzen für das Produkt an dem Sammelboden angeordnet und weisen Drosseln auf. Es werden die Sammelrinnen als Schwingrinnen ausgebildet, wobei die Drosseln bevorzugt querschnittveränderbar ausgestaltet sind. Die Sieblagen können gemeinsam mit dem Sammelboden und die Sammelrinnen getrennt je einen eigenen Schwing¬ antrieb aufweisen, wobei bevorzugt auch die Sammelrinnen als geschlossene Kanäle ausgbildet werden und auf der Oberseite in Längsrichtung durchsichtige Entnahmeklappen für Produktmuster aufweisen.However, the invention also permits a whole series of particularly advantageous further configurations. For example, the discharge nozzles for the product are preferably arranged on the collecting base and have throttles. The collecting troughs are designed as vibrating troughs, the throttles preferably being designed to be adjustable in cross section. The screen layers, together with the collecting base and the collecting troughs, can each have their own vibratory drive, the collecting troughs preferably also being formed as closed channels and having transparent removal flaps for product samples on the top in the longitudinal direction.
Ferner wird vorgeschlagen, dass der Luftzuführkanal über die Länge der Sieblagen und etwa im mittleren Bereich der Sieblage, angeordnet ist. Auf diese Weise bleibt der ganze Bereich oberhalb der Siebe frei für Fensterelemente zur visuellen Kontrolle des Fliessbettes.It is also proposed that the air supply duct be arranged over the length of the screen layers and approximately in the central region of the screen layer. In this way, the entire area above the sieves remains free for window elements for visual inspection of the fluid bed.
Eine weitere ganz besonders vorteilhafte Ausgestaltung liegt darin, zwischen Luftzuführkanal und dem Durchfall- räum eine Mehrzahl von Luftmengen-Einstellklappen anzuordnen.Another particularly advantageous embodiment is to arrange a plurality of air quantity adjustment flaps between the air supply duct and the diarrhea.
Damit ist es erstmals möglich geworden, die Luftmengen- Einstellklappen von dem Staubraum wegzunehmen und in dem Sauberluffteil anzubringen. Es wird hierbei ein wesentlicher Beitrag zur Reinhaltung der Griessputzmaschine im Inneren gebracht. Der Luftein¬ tritt für den Luftzuführkanal kann an einer Endseite der Griessputzmaschine und der Zuführkanal etwa auf der selben Höhe wie die Sieblage angeordnet werden. Die Einstellklappen sind auf der Druckseite des Systems.This made it possible for the first time to remove the air volume adjustment flaps from the dust chamber and to install them in the clean air section. A major contribution is made to keeping the semolina cleaning machine clean inside. The air inlet for the air supply duct can be arranged on one end side of the semolina cleaning machine and the supply duct approximately at the same height as the sieve position. The adjustment flaps are on the pressure side of the system.
Ferner wird vorgeschlagen, die Luftabführung über einen Abscheider, und einen Ventilator mit dem Luftzuführkanal wieder zu verbinden. Damit aber ist es erstmals möglich geworden, die Griessputzmaschine als geschlossenes System und mit Umluft zu betreiben. Es ist dies nicht nur ein wesentlicher Beitrag an die Hygiene in der Mühle sondern es wird darüber hinaus auf diese Weise eine, in der müllerischen Verfahrenstechnik bisher fast zwingend erscheinende Staubquelle, völlig beseitigt. Wenn die Schwingrinnen unter leichten Unterdruck gesetzt werden, entsteht auch hier bei Musterentnahmen keine Störung des Betriebes, und kein Staubaustritt mehr. Auf diese Weise können nun in vorteilhafter Weise mehrere Griessputz- maschinen an einer gemeinsamen Luftabführleitung ange¬ schlossen werden. Bevorzugt werden aber mehrere Griess- putzmaschinen imUmluftbetrieb an einer gemeinsamen Luft- Rückführleitung angeschlossen. Dies ermöglicht mehrere Griessputzmaschinen an einer gemeinsamen Staubabscheide¬ einheit anzuschliessen und mit Umluft zu betreiben.It is also proposed to reconnect the air discharge to the air supply duct via a separator and a fan. But this made it possible for the first time to operate the semolina cleaning machine as a closed system and with circulating air. This is not only an important contribution to the hygiene in the mill, it also completely eliminates a source of dust that previously appeared to be almost imperative in the milling process technology. If the vibrating troughs are placed under a slight negative pressure, there is no disruption to the operation and no more dust escaping. In this way, several semolina cleaning machines can now advantageously be connected to a common air discharge line. However, preferably several semolina cleaning machines are connected to a common air return line in recirculation mode. This enables several semolina cleaning machines to be connected to a common dust separator unit and operated with circulating air.
Für die Beherrschung des ganzen LuftSystems wird weiterhin vorgeschlagen, das ganze UmluftSystem mit einer Abluftleitung zu versehen, so dass zumindest der obere Bereich der Griessputzmaschine gegenüber der Umgebung in Unterdruck setzbar ist. Kurze Beschreibung der ErfindungFor the mastery of the entire air system, it is further proposed to provide the entire circulating air system with an exhaust air line, so that at least the upper area of the semolina cleaning machine can be placed in negative pressure with respect to the surroundings. Brief description of the invention
Die Erfindung wird nun an Hand einiger Ausführungs¬ beispiele mit weiteren Einzelheiten erläutert. Dabei zeigen:The invention will now be explained in more detail with the aid of a few exemplary embodiments. Show:
die Figur 1 einen Längsschnitt durch eine Griessputz¬ maschine;1 shows a longitudinal section through a semolina cleaning machine;
die Figur 2 die Ansaugseite mit einem Querschnitt2 shows the suction side with a cross section
II - II der Figur 1;II - II of Figure 1;
die Figur 3 die Absaugseite mit einem Querschnitt3 shows the suction side with a cross section
III - III der Figur 1;III - III of Figure 1;
die Figur 4 schematische Ansaugseite und Absaugseite im Verbund mit Umluft;FIG. 4 shows a schematic suction side and suction side in combination with circulating air;
die Figur 5 eine Gruppe von 3 Griessputzmaschinen sinngemäss zu der Figur 4;FIG. 5 shows a group of 3 semolina cleaning machines analogous to FIG. 4;
die Figur 6 eine Längsansicht der Griessputzmaschine.6 shows a longitudinal view of the semolina cleaning machine.
Wege zur Ausführung der ErfindungWays of Carrying Out the Invention
In der Folge wird nun auf die Figur 1 und 6 Bezug genommen.In the following, reference is now made to FIGS. 1 and 6.
Eine Griessputzmaschine 1 ist auf einer Konsole 2 abgestützt und weist ein feststehendes Kopfteil 3 auf. Das Gut wird über einen Produkteinlauf 4 und eine Einlaufkaskade eingespiesen, und direkt auf die oberste Sieblage 5' der Siebe 5 geleitet. Die Siebe 5 werden gemeinsam von einem Schwingungserreger 30 in Schwingungen versetzt. Das über den Sieblagen 51 ,5' ' , 5* ' ' als Abstoss am tief¬ liegenden Ende anfallenden Gut wird über Produkt¬ abführkanäle 6' , 6' ' , 6' ' * und in der Figur 1 über einen gemeinsamen Produktabführkanal 6 abgeleitet. Der Sieb¬ durchfall gelangt auf einen Produktsammelboden 7 und über eine Vielzahl von Überleitkanälen 8, 8' , 8" usw. und wird über jeweilige Drosseln 9 in einen von 2 Sammelrinnen 9 resp. 9' von welchen das Gut entweder über ein Ablaufröhr 10 oder 11 je nach Produktqualität weitergegeben wird. Alle schwingenden Teile weisen als Auflage ein Feder¬ element 12 auf. Im oberen, mittleren Teil der Griessputz¬ maschine ist ein Luftabführstutzen 13 angeordnet, von welchem die staubhaltige Luft über einen Staubabscheider 14 einen Ventilator 15 und einer Luftrückführleitung 16, über einen Klappenkasten 17 als gereinigter Frischluft¬ strom über einen Luftzuführkanal 18 in einen Produkt- Durchfallraum 19 (Fig. 2) gelangt. Wichtig ist, dass die Fliessschicht auf der obersten Sieblage 5 über Fenster 20 wie bishermit dem Auge, kontrollierbar ist. In der Figur 2 (wie auch bei den folgenden Figuren 3 - 5) ist die Griessputzmaschine durch zwei gleiche Maschinen resp. als Doppelmaschine dargestellt, wie dies für Griessputz- maschinen üblich ist. Wesentlich ist nun aber, dass der Luftzuführkanal 18 zweifach vorhanden ist, für eine gezielte Steuerung oder Luftströmung für jede Ma¬ schinenhälfte. Im Falle der Umluft ist jedoch die Luftzu- und Wegführung gemeinsam. Der Übergang von dem Luftzu- führkanal 18 in den Durchfallraum 19 ist durch Luftre¬ gulierschieber 20 über Handräder 21. Die beiden Sammel¬ rinnen 9 resp.9' enthalten je unterschiedliche Produkte, was mit kleinen Kreisen resp. Punkten angedeutet ist. Das feststehende Kopfteil 3 ist an einer Mittelstütze 2' gehalten. Jedes Putzabteil mit Sieblagen 5, Produktsam¬ melboden 7 sowie Luftzuführkanal 18 bildet eine Schwing¬ einheit, die als Doppeleinheit verbunden sein können, und über flexible Manchetten 33 an den festenMaschinenteilen angeschlossen ist. Über eine Einstellklappe 22 kann der Produktstrom von jedem einzelnen Überleitkanal 8, 8!,8'' usw. entweder in die Sammelrinne 9 oder in die Sammelrinne 9' gelenkt werden. Dies kann durch Verschwenken nach rechts auf der linken Maschine, oder nach links auf der rechten Maschine erfolgen. Ein Produktmuster kann durch Öffnen von Entnahmeklappen 23 von dem jeweiligen Überleitkanal entnommen werden.A semolina cleaning machine 1 is supported on a bracket 2 and has a fixed head part 3. The material is fed in via a product inlet 4 and an inlet cascade, and is passed directly to the uppermost sieve layer 5 'of the sieves 5. The screens 5 are vibrated together by a vibration exciter 30. The material obtained via the sieve layers 5 1 , 5 '', 5 * '' as a push-off at the low-lying end is conveyed via product discharge channels 6 ', 6'',6''* and in FIG. 1 via a common product discharge channel 6 derived. The sieve diarrhea arrives at a product collecting tray 7 and through a plurality of transfer channels 8, 8 ', 8 "etc. and is transferred via respective throttles 9 into one of two collecting troughs 9 or 9', of which the material either passes through a drain pipe 10 or Depending on the product quality, all vibrating parts have a spring element 12. In the upper, middle part of the semolina cleaning machine there is an air discharge nozzle 13, from which the dust-containing air is supplied via a dust separator 14, a fan 15 and an air return line 16, via a flap box 17 as a cleaned fresh air stream, via an air supply duct 18, into a product through-flow space 19 (FIG. 2). It is important that the flow layer on the top sieve layer 5 can be checked by window 20 as before with the eye. In FIG. 2 (as also in the following FIGS. 3-5), the semolina cleaning machine is by two identical machines or as a double machine ne is shown, as is common for semolina cleaning machines. It is essential, however, that the air supply duct 18 is provided in two, for a targeted control or air flow for each half of the machine. In the case of recirculated air, however, the air supply and route are common. The transition from the air supply duct 18 to the diarrhea chamber 19 is by air regulating slide 20 via handwheels 21. The two collecting channels 9 and 9 'each contain different products, which is indicated by small circles or. Points is indicated. The fixed head part 3 is held on a central support 2 '. Each cleaning compartment with sieve layers 5, product collecting base 7 and air supply duct 18 forms a vibrating unit, which can be connected as a double unit and is connected to the fixed machine parts via flexible sleeves 33. The product flow from each individual transfer channel 8, 8 ! , 8 '' etc. can either be directed into the collecting channel 9 or into the collecting channel 9 '. This can be done by swiveling to the right on the left machine or to the left on the right machine. A product sample can be removed from the respective transfer channel by opening removal flaps 23.
In der Figur 3 ist die Luftströmung von dem Durchfallraum 19 durch die Sieblagen 5', 51', 5111 sowie einem Luftabzugraum 24 dargestellt.FIG. 3 shows the air flow from the diarrhea space 19 through the sieve layers 5 ', 5 1 ', 5 111 and an air extraction space 24.
Die Figur 4 vereinigt die Figuren 2 und 3, stellt also 2 verschiedene Schnitte, links die Luftabführung, rechts die Luftzuführung einer Griessputzmaschine dar.FIG. 4 combines FIGS. 2 and 3, ie represents 2 different cuts, the air discharge on the left and the air supply of a semolina cleaning machine on the right.
Die Figur 5 zeigt sinngemäss 3 Griessputzmaschinen, je als Doppelmaschinen dargestellt, in der oberen Bildhälfte die Luftabführung in der untere Bildhälfte die Luftzuführung an die je gleichen Maschinen. Zusätzlich zu der Figur 3 ist in der Figur 5 noch ein Staubfilter 25 sowie eine Abluftleitung 26 mit einer steuerbaren Drosselklappe 27 zur Regulierung der Luftdruck¬ verhältnisse in dem System.FIG. 5 basically shows 3 semolina cleaning machines, each shown as a double machine, the air discharge in the upper half of the picture, the air supply to the same machines in the lower half of the picture. In addition to FIG. 3, FIG. 5 also shows a dust filter 25 and an exhaust air line 26 with a controllable throttle valve 27 for regulating the air pressure conditions in the system.
Wie in der Figur 6 angedeutet ist, gestattet die erfinderische Lösung auch eine traditionelle Betriebsweise soweit es die Luftabsaugung betrifft. Die Luftansaugung kann aber, wie mit Pfeilen 30, 31, 32 angedeutet ist, aus dem oberen Raum erfolgen, also nicht mehr von unten, von dem fussbodennahen Bereich, der normalerweise eine höhere Belastung an Staub- oder Bakterien aufweist. Zu diesem Zweck wird an der entsprechenden Stelle ein Luftansauggitter angebracht. As indicated in FIG. 6, the inventive solution also allows a traditional mode of operation as far as air extraction is concerned. The air intake can, however, as indicated by arrows 30, 31, 32, take place from the upper room, that is, no longer from below, from the area near the floor, which normally has a higher level of dust or bacteria. For this purpose, an air intake grille is attached at the appropriate point.

Claims

Patentansprüche Claims
1. Verfahren zur Luftführung für das Putzen von Griessen, wobei das Gut über mehrere schwingfähig gelagerte, ein Putzabteil bildende, Sieblagen gereinigt und über Produktabführungeen für den Siebabstoss sowie unter den Sieblagen mit einer Vielzahl von einstellbaren Ableitstutzen für die Überführung des Siebdurchfalles in zwei oder mehrere Sammelrinnen in die gewünschten Fraktionen getrennt wird, d a d u r c h g e k e n n z e i c h n e t, dass die Abluft von wenigstens zwei Putzabteilen in einer Luftabführleitung gesammelt und über eine getrennt ange¬ ordnete Aspiration abgesaugt, gereinigt und als Zuluft über je einen Zuführkanal unter die Sieblagen zurückgeführt wird.1.Air routing for the cleaning of semolina, the material being cleaned via several oscillatingly mounted sieve layers forming a cleaning compartment and via product discharge openings for the sieve rejection as well as under the sieve layers with a multitude of adjustable discharge nozzles for transferring the sieve diarrhea into two or more Collecting channels are separated into the desired fractions, characterized in that the exhaust air from at least two cleaning compartments is collected in an air discharge line and sucked off via a separately arranged aspiration, cleaned and returned as supply air under the sieve layers via a respective feed channel.
2. Griessputzmaschine mit mehreren schwingfähig gelager¬ ten Sieblagen (5), Luftzu- und Luftabführung (13,17), ei¬ ner Produktspeisung (4), einer Produktabführung (6',6", 6"') für den Siebabstoss sowie unter den Sieblagen ein Produktsammeiboden (7) mit einer Vielzahl von einstell¬ baren Ableitstutzen (8,8',8") für die Überführung des Siebdurchfalles in zwei oder mehrere Sammelrinnen (9, 9'), d a d u r c h g e k e n n z e i c h n e t, dass der Produktsammeiboden mit einem, sich über dessen Länge erstreckender Luftzuführkanal einen nach aussen abschliessenden Durchfallraum und gemeinsam mit den Sieblagen eine Schwingeinheit bilden. 2. Semolina cleaning machine with several oscillating sieve layers (5), air supply and air discharge (13, 17), a product feed (4), a product discharge (6 ', 6 ", 6"') for the sieve rejection and under the sieve layers have a product collecting base (7) with a plurality of adjustable discharge nozzles (8,8 ', 8 ") for transferring the sieve diarrhea into two or more collecting channels (9, 9'), characterized in that the product collecting base with one The air supply duct, which extends over its length, forms a diarrhea chamber that closes off to the outside and, together with the sieve layers, forms an oscillating unit.
3. Griessputzmaschine nach Patentanspruch 2, d a d u r c h g e k e n n z e i c h n e t, dass der Lufteintritt (18) für den Luftzuführkanal im oberen Bereich an einer Endseite der Griessputzmaschine (1) angeordnet ist.3. Semolina cleaning machine according to claim 2, so that the air inlet (18) for the air supply duct is arranged in the upper region on one end side of the semolina cleaning machine (1).
4. Griessputzmaschine nach Patentanspruch 2 und 3, d a d u r c h g e k e n n z e i c h n e t, dass der Luftzuführkanal etwa auf derselben Höhe wie die Sieblagen angeordnet ist.4. Semolina cleaning machine according to claim 2 and 3, so that the air supply duct is arranged approximately at the same height as the sieve layers.
5. Griessputzmaschine nach einem der Patentansprüche 2 bis 4, d a d u r c h g e k e n n z e i c h n e t, dass zwischen Luftzuführkanal (18) und den Durchfallraum (19) eine Mehrzahl von Luftmengen-Einstellklappen (20) angeordnet sind.5. semolina cleaning machine according to one of claims 2 to 4, d a d u r c h g e k e n z e i c h n e t that between the air supply channel (18) and the diarrhea (19) a plurality of air volume adjustment flaps (20) are arranged.
6. Griessputzmaschine nach einem der Patentansprüche 2 bis 5, d a d u r c h g e k e n n z e. i c h n e t, dass die Luftabführung (13) etwa im mittleren Bereich über den Sieblagen (5', 5", 5"') angeordnet ist.6. Semolina cleaning machine according to one of claims 2 to 5, d a d u r c h g e k e n n z e. i c h n e t that the air discharge (13) is arranged approximately in the central region above the sieve layers (5 ', 5 ", 5"').
7. Griessputzmaschine nach einem der Patentansprüche 1 bis 6, d a d u r c h g e k e n n z e i c h n e t, dass die Luftabführung (13) über einen Abscheider (14), einen Ventilator (15) mit dem Luftzuführkanal (18) wieder verbunden ist, für einen Umluftbetrieb.7. Semolina cleaning machine according to one of the claims 1 to 6, so that the air discharge (13) is reconnected to the air supply duct (18) via a separator (14), a fan (15), for recirculating air operation.
8. Griessputzmaschine nach einem der Patentansprüche 1 bis 7, d a d u r c h g e k e n n z e i c h n e t, dass mehrere Griessputzmaschinen (1) an einer gemeinsamen8. Semolina cleaning machine according to one of the claims 1 to 7, that a plurality of semolina cleaning machines (1) on a common one
Luftabführleitung (28) angeschlossen sind. Air discharge line (28) are connected.
9. Griessputzmaschine nach Patentanspruch 8, d a d u r c h g e k e n n z e i c h n e t, dass mehrere Griessputzmaschinen (1) im Umluftbetrieb an einer gemeinsamen Luft-Rückführleitung (29) ange¬ schlossen sind.9. Semolina cleaning machine according to claim 8, so that several semolina cleaning machines (1) are connected to a common air return line (29) in circulating air mode.
10. Griessputzmaschine nach Patentanspruch 7 bis 9, d a d u r c h g e k e n n z e i c h n e t, dass mehrere Griessputzmaschinen (1) an einer gemeinsamen Staubabscheideeinheit (14, 25) angeschlossen und mit Umluft betreibbar sind.10. Semolina cleaning machine according to claim 7 to 9, so that several semolina cleaning machines (1) are connected to a common dust separating unit (14, 25) and can be operated with circulating air.
11. Griessputzmaschine nach Patentanspruch 10, d a d u r c h g e k e n n z e i c h n e t, dass das ganze Umluftsystem eine steuerbare Abluftleitung (26) aufweist.11. Semolina cleaning machine according to claim 10, so that the entire recirculation system has a controllable exhaust air line (26).
12. Griessputzmaschine nach einem der Patentansprüche 2 bis 11, d a d u r c h g e k e n n z e i c h n e t, dass die einstellbaren Ableitstutzen (8, 8', 8") an den12. Semolina cleaning machine according to one of the claims 2 to 11, d a d u r c h g e k e n n z e i c h n e t that the adjustable discharge nozzle (8, 8 ', 8 ") to the
Produktsammelbσden angeschlossen sind und Drosseln (9) aufweisen.Product collections are connected and have throttles (9).
13. Griessputzmaschine nach Patentanspruch 12, d a d u r c h g e k e n n z e i c h n e t, dass die Sammelrinnen (9, 9') als Schwingrinnen ausgebildet und die Drosseln (9) bezüglich des Durchtrittsquerschnittes veränderbar sind.13. Semolina cleaning machine according to claim 12, so that the collecting troughs (9, 9 ') are designed as oscillating troughs and the throttles (9) can be changed with regard to the passage cross section.
14. Griessputzmaschine nach einem der Patentansprüche 2 bis 13, d a d u r c h g e k e n n z e i c h n e t, dass die Sieblagen (5', 5", 5"*) zusammen mit dem Sairtmelboden (7) und die Sammelrinnen (9, 91) je einen eigenen Schwingentrieb (30) aufweisen. 14. Semolina cleaning machine according to one of the claims 2 to 13, characterized in that the screen layers (5 ', 5 ", 5" *) together with the Sairtmelboden (7) and the collecting channels (9, 9 1 ) each have their own swing drive (30) exhibit.
15. Griessputzmaschine nach einem der Patentansprüche 2 bis 14, d a d u r c h g e k e n n z e i c h n e t, dass die Sammelrinnen (9, 9') als geschlossene Kanäle ausgebildet sind und auf der Oberseite in Längsrichtung15. Semolina cleaning machine according to one of claims 2 to 14, so that the collecting channels (9, 9 ') are designed as closed channels and on the top in the longitudinal direction
Entnahmeklappen (23) für Produktmuster aufweisen. Have removal flaps (23) for product samples.
EP92907745A 1991-04-15 1992-04-14 Semolina purifying machine with closed air circuit Expired - Lifetime EP0533881B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
CH112391 1991-04-15
CH1123/91 1991-04-15
PCT/CH1992/000071 WO1992018257A1 (en) 1991-04-15 1992-04-14 Method of supplying air for purifying semolina, and a semolina-purifying machine

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EP0533881A1 true EP0533881A1 (en) 1993-03-31
EP0533881B1 EP0533881B1 (en) 1996-11-06

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JP (1) JP2675195B2 (en)
KR (1) KR960002946B1 (en)
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EE (1) EE03041B1 (en)
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RU (1) RU2090271C1 (en)
UA (1) UA26092C2 (en)
WO (1) WO1992018257A1 (en)

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WO1992018257A1 (en) 1992-10-29
JP2675195B2 (en) 1997-11-12
EE03041B1 (en) 1997-10-15
US5348161A (en) 1994-09-20
KR960002946B1 (en) 1996-03-02
EP0533881B1 (en) 1996-11-06
ATE144921T1 (en) 1996-11-15
JPH05507880A (en) 1993-11-11
DE4126065C2 (en) 1994-09-29
ES2093824T3 (en) 1997-01-01
UA26092C2 (en) 1999-04-30
RU2090271C1 (en) 1997-09-20
DE4126065A1 (en) 1992-10-22
KR930700223A (en) 1993-03-13
DE59207487D1 (en) 1996-12-12

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