EP3368222A1 - Pneumatisch verbundene kaskadensichter und kreislaufmahlanlage mit pneumatisch verbundenen kaskadensichtern - Google Patents
Pneumatisch verbundene kaskadensichter und kreislaufmahlanlage mit pneumatisch verbundenen kaskadensichternInfo
- Publication number
- EP3368222A1 EP3368222A1 EP16787859.4A EP16787859A EP3368222A1 EP 3368222 A1 EP3368222 A1 EP 3368222A1 EP 16787859 A EP16787859 A EP 16787859A EP 3368222 A1 EP3368222 A1 EP 3368222A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- cascade classifier
- classifier
- classifying
- cascade
- volume flow
- 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
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C21/00—Disintegrating plant with or without drying of the material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C23/00—Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in preceding groups or not specially adapted to apparatus covered by a single preceding group
- B02C23/08—Separating or sorting of material, associated with crushing or disintegrating
- B02C23/14—Separating or sorting of material, associated with crushing or disintegrating with more than one separator
-
- 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
- B07B4/02—Separating solids from solids by subjecting their mixture to gas currents while the mixtures fall
- B07B4/04—Separating solids from solids by subjecting their mixture to gas currents while the mixtures fall in cascades
-
- 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 sifter for sifting granular reformgut, comprising a first V-shaped static cascade classifier, wherein the first cascade classifier a first admirheral-like baffles and first louvered arranged preparefluten, at least one prepare for a first withdrawn, finer prepared granular preparegut, at least one Austragso réelle for a selected coarse material fraction and an outlet for a flow consisting of the classifying air and a first withdrawn reformgutfrpress, and a second V-shaped static cascade classifier, the second cascade classifier a second viewing zone with second staircase-like baffles and second louver-like arranged preparefluten, an inlet for a reformluftvolumenstrom, at least one Austragso réelle for a selected coarser preparer forcing and an outlet for a flow comprising the classifying air and a second withdrawn, finer preparegutfr neglect.
- the invention further relates to a Kreislaufmahlstrom for crushing granular material to be ground, having at least one grinding device for crushing the granular ground material to ground regrind and in the material flow direction behind the at least one grinding device connected sifter with at least one Austragso réelle for a selected coarse fraction, said at least one Austragso réelle with a crop of the at least one grinding device is in communication.
- a Steplaufmahlstrom for crushing granular material to be ground, having at least one grinding device for crushing the granular ground material to ground regrind and in the material flow direction behind the at least one grinding device connected sifter with at least one Austragso réelle for a selected coarse fraction, said at least one Austragso réelle with a crop of the at least one grinding device is in communication.
- granular fresh material can be obtained in Kreislaufmahlanlagen by grinding processes and subsequent prospects granular fines.
- Coarse material screened during sifting is circulated and relinquished to the grinding apparatus
- roller presses high-pressure roller presses, good-bed roller mills
- the emerging after the stress from the nip material consists of a proportion with a range of medium and fine-grained components and a coarse material fraction only slightly crushed and / or crushed to slugs material.
- V-classifiers typically used in cycle grinding plants include the static (ie, non-moving components) cascade classifiers, which most often have a V-shaped, bay-like viewing space and are therefore also referred to as V-classifiers.
- V-shaped static cascade classifiers are known, for example, from the patent EP 0 650 763 B1 and the publication DE 196 48 841 A1, EP 0 650 763 B1 also teaching the use of cascade classifiers in circulation grinding plants.
- Generic static cascade classifiers accordingly have a substantially V-shaped, shaft-shaped housing, in which two meetzonenbegrenzungs render between them form a viewing zone. The grainy material to be seen falls gravity from above through an entry opening into the viewing zone of the V-classifier.
- One of the crushernbegrenzungs refuse has cascade-like with each other arranged baffles in the manner of a stair grate, on which the particles of the prepareguts stepstep stage or cascade fall down.
- a special advantage of Cascade classifier is that contained in the visual material particle agglomerates, for example. Slugs in cement production, are largely disagglomerated by the impact on the baffles. Transverse to the direction of fall, ie approximately horizontally, sighting air is passed through a visible air inlet into the viewing zone between the cascading baffles.
- the finer, lighter togut ashameder not classified as coarse material are carried by the transversely flowing classifying air so that they are withdrawn in a flow through the reformluftkanäle from the viewing zone and discharged from an outlet behind the prepare for the production of the product.
- This cascade classifier carries down as a product a Mittelgutfr neglect and together with the classifying air of this second cascade classifier a fine material fraction as another product.
- it is disadvantageous in terms of the energy requirement as well as of the plant engineering effort that the entire proportion of the finer bringgutfr so subtracted from the first cascade classifier must first be supplied to a product separator before it can then be registered in the second cascade classifier.
- the object of the invention is therefore to provide a sifter for sifting granular reformgut available, which provides based on the cascade classifier at least two different in terms of particle size products and thereby has a lower energy consumption.
- the object of the invention is also to provide a Kreislaufmahlstrom for crushing granular material to be ground, which comprises such a classifying device.
- the object of the invention is achieved by a sifting device for sifting granular reformgut with the features of claim 1 and by a Kreislaufmahlstrom for crushing granular material to be ground with the features of claim 6. Further advantageous embodiments are specified in the subclaims to claim 1 and in the dependent claims to claim 6.
- the sifting device for sifting granular reformgut two V-shaped static cascade classifier includes, which are not only connected in series, but are also pneumatically interconnected in a special way.
- the volume flow, the first Cascade classifier leaves through the designated outlet and consists of classifying air and suspended in the classifying air reformgutfr any, namely not first performed in a Gutabscheidevorraum, then mechanically enter the fraction there deposited in a second cascade classifier. Rather, this volume flow (consisting of the classifying air and the first withdrawn withdrawgutfr forcing from the first cascade classifier) just forms the prepare Kunststoffvolumenstrom the second cascade classifier.
- the second cascade classifier Due to the fact that the coarse material fraction has already been inspected in the first cascade classifier and taking into account any drop in pressure or velocity of the classifying air stream, the second cascade classifier can be dimensioned differently from the first one. Due to the finer withdrawguts or separating section and therefore required lower speeds, he will be larger in the normal case larger than the first cascade classifier.
- a selected fraction is discharged, which represents a desired product, referred to here as product A, as the middle fraction.
- product A a desired product
- the pneumatic connection between the two cascade classifiers is achieved in that according to the invention the outlet for the volume flow from the first cascade classifier is pneumatically connected pneumatically to the inlet of the classifying air volume flow of the second cascade classifier.
- the visual zone boundary wall of the first cascade classifier which is arranged downstream of the visual floods (of the first cascade classifier), is permeable to the volume flow which consists of the classifying air and the first withdrawn withdrawgutfr against the first cascade classifier.
- the permeabilities can be distributed over the entire withdrawzonenbegrenzungswand or provided, for example, only in the upper region.
- this process Due to the permeabilities of this sortzonenbegrenzungswand the outlet for the flow from the first cascade classifier is formed.
- the digestzonenbegrenzungswand the second cascade classifier which is arranged in the flow direction in front of the baffles, permeable.
- This processzonenbegrenzungswand forms with their permeabilities that can be distributed over the entire reformzonenbegrenzungswand or even in the upper area, the reformluftvolumenstromeinlass, this stream is inventively given by the volume flow consisting of the classifying air and the first withdrawn reformgutfr forcing from the first cascade classifier.
- permeable sortstrombeg- tion walls can in the constructive realization of the pneumatic connection of the two classifier example.
- an intermediate zone in a housing form which also includes the first and second Cascade classifier, or be pneumatically connected to each other by a pipe.
- the visual zone boundary wall of the first cascade classifier which is arranged downstream of the first visual floods
- the visual zone boundary wall of the second cascade classifier which is arranged upstream of the second baffle plates
- the cavity thus represents a transitional zone between the two cascade classifiers, through which the volume flow (consisting of the classifying air and the first withdrawn admirgutfr against the first cascade classifier) flows to the second cascade classifier. It is provided that the cavity has an outlet opening in a wall, wherein a partial volume flow of the volume flow branches off from the first cascade classifier through the outlet opening, ie, out of the cavity and away from the two cascade classifiers.
- the visual efficiency and visual acuity in the second cascade classifier depends in particular on the visual air volume flow (quantity, speed) and the second cascade classifier, which can be dimensioned differently from the first, receives the volume flow emerging from the first cascade classifier as the classifying air, by means of the branching through the outlet opening an adjustment of the visual air conditions for the second cascade classifier can be achieved.
- the size of the outlet opening is continuously adjustable.
- an adjustment of the visual air conditions for the second cascade classifier can be carried out here by the person skilled in the art during operation.
- a control can be made.
- the outlet opening in the wall of the cavity communicates with a Gutabscheider.
- the diverted partial flow is passed through suitable pipelines to the Gutabscheider, which is designed for example as a filter, preferably as a cyclone (cyclone separator, centrifugal).
- the separator is separated into the portion of the fraction of visible material which has been drawn off from the first cascade classifier and which is suspended in the diverted partial volume flow. So that this proportion remains available to the process, it is provided that the portion of the first withdrawn withdrawgutfr so separated in Gutabscheider is entered by at least one Sekundärguteintragsö réelle in the second cascade viewers.
- the transport of the sifting material from the material separator to the secondary product insertion opening can be effected by gravity. Otherwise, mechanical means of transport, for example a bucket elevator, must be used.
- the Sekundärguteintragsö réelle corresponds to the generic reformguteintragsö réelle in the upper part of a cascade classifier.
- additional material can be entered for sifting into the viewing zone of the second cascade classifier. This may allow for enrichment or variation in the grain size distribution spectrum.
- the finer reformgutfr noise (the numbering of the cascade classifier according to the second withdrawn admirgutfr expect) withdrawn from the second cascade classifier with the classifying air in a Gutabscheider (correspondingly referred to as second Gutabscheider) is separated from the classifying air, in she is suspended.
- connection is made as a direct connection, or there is another (or exceptionally more) classifier connected between the second cascade classifier and the second classifier for further product separations in the withdrawn finer withdrawgutfr quasi.
- the second Gutabscheider can, for example, as a filter, preferably as a cyclone, be executed.
- a Kreislaufmahlstrom is also provided, in which the classifying device is designed as a classifying device according to the invention, including the illustrated embodiments.
- the ground regrind is entered through the at least one entry opening for granular withdrawgut in the first cascade viewers.
- the coarse material which is located in the first cascade classifier, is recirculated to the grinding device in the grinding cycle and supplied to the grinding device by the material feeding device for renewed stress, for example in the nip of a roller press. It is therefore kept in circulation until it is removed during the viewing process in the first cascade classifier with the classifying air.
- the proposed classifying device is suitable, in particular on account of the first cascade classifier, for carrying out the required pancake agglomeration.
- the roller press By arranging the roller press with its nip above the entry opening of the first cascade classifier or by arranging the roller press with its crop below the discharge for the coarse material fraction of the first cascade classifier, the respective transport energy efficient low gravity can be performed.
- the ever other transport is by mechanical means, eg. Conveyors and bucket elevators, to afford.
- the second cascade classifier a classifier to the prospect of Mittelgutfr forcing (product B) and for removing a fine material fraction in a Viewing air fine material stream is downstream.
- the outlet for the volume flow consisting of the classifying air and the second withdrawn bombardgutfr against the second cascade classifier is to communicate pneumatically with the additional classifier.
- a comparatively finer, second middle fraction, product B is obtained by deposition in the downstream classifier. It is further provided that the separator is followed by a second Gutabscheider in reformulationstromraum, wherein the second Gutabscheider the fine material fraction (product C) separates from the classifying air-fine material stream.
- a third product C with very small particle sizes can be obtained by this fine-viewing stage.
- the second Gutabscheider is given in a further embodiment as a filter, preferably as a cyclone, and corresponds to the second Gutabscheider, which has already been described above in an embodiment of the classifying device according to the invention.
- the classifier is a dynamic rod basket classifier or a static air classifier, which are just as suitable for a pneumatic material task as for the conditions of use and separation requirements in cement production processes.
- a sorter known from DE 42 23 762 B4 as a compact combination of a static sifter and a downstream (horizontal wave) dynamic rod sifter is marketed (and marketed under the name VSK® sifter) to separate another, fourth product.
- Figure 1 is a sifter device according to the invention in a schematic representation in the embodiment with diversion of a partial volume flow.
- FIG. 1 schematically shows an embodiment of the classifying device 1 according to the invention for sifting granular material 2.
- the granular reformgut 2 is about within a Kreislaufmahlstrom for crushing granular material in the cement production as ground regrind, which may also contain agglomerated flakes given.
- This passes into the viewing zone 4 of the first V-shaped static cascade sifter 5.
- stepped baffles 6 and arranged blind-like viewing floods 7 are present.
- the thus classified Grobgutfr pain 10 is in the event that the sifter 1 is integrated in a Kreislaufmahlstrom invention recirculated to the grinding device (not shown) again comminuted and is in circulation until it is deposited and discharged during the viewing process. Furthermore, lighter, smaller components of the visible material 2 leave the viewing zone 4 by the dominant entrainment effect of the classifying air stream 9 through the classifying air channels between the visual floods 7 in the volume. menstrom 12, which consists of the classifying air 9 and this suspended in her, first withdrawn withdrawgutfrtress.
- this volume flow 12 is now directed into a second cascade classifier 14, which is pneumatically connected to the first cascade classifier 5.
- the volume flow 12 enters the second cascade classifier 14 and its viewing zone 17 through the visual zone boundary wall 16 located upstream of the baffle plates 15 of the second cascade classifier 14.
- the permeabilities of the viewing zone boundary wall 13 form the outlet 18 of the first cascade classifier 5 for the volume flow 12 and the permeabilities of the reformzonenbegrenzungswand 16 the inlet 19 of the second cascade classifier 14 for the volume flow 12th
- a cavity 24 is formed between the two cascade detectors 5, 14 between the two cited visual zone boundary walls 13, 16, by means of which the two cascade classifiers 5, 14 are pneumatically interconnected.
- an outlet opening 25 is provided in the wall of the cavity 24, an outlet opening 25 is provided.
- the preferred can be continuously changed in their opening size, a sectionvolumenstronn 26 of the flow rate 12 can be diverted.
- the strength of the given by the flow rate 12 classifying air flow in the second cascade classifier 14 can be adjusted for an effective and selective viewing process or even controlled.
- Sekundärguteintragsötechnisch 27 also provided in the illustrated embodiment, the possibility is given, for example.
- grainy material, secondary material 28, enter in the second cascade classifier.
- Sekundärguteintragsö réelle can remain permanently closed.
- portions of the first withdrawn reformgutfr quasi be derived from the cavity 24.
- the partial volume flow 26 may be small compared to the total volume flow 12 before the diversion, but also up to about half of the total volume flow 12 make up. As a result of gravity, fewer particles are carried upwards through the outlet opening 25. This diverted portion of the first withdrawn admirgutfr quasi can also be recovered.
- FIG. 2 the classifying device 1 according to the invention from FIG. 1 is shown, now expanded by a (first) good separator 29 designed as a cyclone 29. This separates the diverted proportion of visible material 30 from the classifying air 9.
- the classifying air 9 is discharged in the illustrated example via a blower 31 and a filter in the environment or made available at other points of the entire system, for example, returned to the first V-classifier, the diverted prepareil 30 for further viewing process through the Sekundärguteintragsö réelle 27 registered in the second Kaskadensicht 14.
- the illustrated separation and return of the diverted portion is considerably cheaper in terms of energy requirements than a mere, separate series connection of two cascade classifiers without the inventive pneumatic connection.
- the entire proportion of the finer bringgutfr deducted from the first cascade classifier would first have to be supplied to a product separator before it could then be registered in the second cascade classifier.
- FIG. 3 also schematically illustrates the classifying device 1 according to the invention from FIG. 2, now expanded by a fine-vision stage connected downstream of the second cascade classifier 14.
- the volume flow 22 formed from the classifying air 9 and the second withdrawn meetgutfr neglect is passed here for further separation in an additional classifier 32.
- the downstream classifier 32 is designed as a static Lucasstromsich- ter 32.
- product B is selected and deducted a fines fraction in the classifying air-fine flow 33.
- the fine material fraction is provided as product C.
- the classifying air 9 is, as shown, discharged by a blower 35 and a filter into the environment or made available at other points of the entire system.
- this fresh air portion can be returned to the first cascade classifier 5 and introduced there together with fresh air or hot gas through the classifying air inlet 8 as total amount of air 9.
- the shown downstream of a second Gutabscheiders 34, such as the cyclone 34, and the fan 35 and the possibility of returning the sortluftanteils 9 to the sighting air inlet 8 are also possible and advantageous in the embodiment shown in Figure 2, in which case, however, between the second cascade classifier 14 and a second Gutabscheider 34 no further classifier 32 is interposed.
- product A grain sizes smaller than 4 mm are typical, for product B grain sizes smaller than 1 mm to less than 0.3 mm and for product C grain sizes smaller than zero , 15 mm to less than 0.02 mm.
- Classifying device 13 Visual zone boundary wall (first cascade-dense sight
- Baffle plate (first cascade wall (second cascade sifter)
Landscapes
- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Combined Means For Separation Of Solids (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102015013892.8A DE102015013892B3 (de) | 2015-10-28 | 2015-10-28 | Pneumatisch verbundene Kaskadensichter und Kreislaufmahlanlage mit pneumatisch verbundenen Kaskadensichtern |
PCT/EP2016/075894 WO2017072214A1 (de) | 2015-10-28 | 2016-10-27 | Pneumatisch verbundene kaskadensichter und kreislaufmahlanlage mit pneumatisch verbundenen kaskadensichtern |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3368222A1 true EP3368222A1 (de) | 2018-09-05 |
EP3368222B1 EP3368222B1 (de) | 2019-10-02 |
Family
ID=57208296
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP16787859.4A Not-in-force EP3368222B1 (de) | 2015-10-28 | 2016-10-27 | Pneumatisch verbundene kaskadensichter und kreislaufmahlanlage mit pneumatisch verbundenen kaskadensichtern |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP3368222B1 (de) |
CN (1) | CN108348923B (de) |
DE (1) | DE102015013892B3 (de) |
WO (1) | WO2017072214A1 (de) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102017117985A1 (de) * | 2017-08-08 | 2019-02-14 | Thyssenkrupp Ag | Verfahren und Anlage zur Herstellung von Zement |
DE102018129538B4 (de) * | 2018-11-23 | 2020-10-01 | Khd Humboldt Wedag Gmbh | Pneumatisch miteinander verbundener Mehrfachsichter |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB474557A (en) * | 1936-01-18 | 1937-11-03 | Automatic Coal Cleaning Compan | Improvements in pneumatic separators |
DE4223762B4 (de) * | 1992-07-18 | 2009-07-23 | Khd Humboldt Wedag Gmbh | Sichtereinrichtung zum Sichten von körnigem Gut und Umlaufmahlanlage mit Einschaltung einer solchen Sichtereinrichtung |
DE4337215A1 (de) * | 1993-10-30 | 1995-05-04 | Kloeckner Humboldt Deutz Ag | Umlaufmahlanlage |
DE19648841A1 (de) * | 1996-11-26 | 1998-05-28 | Deutz Ag | Sichter zum Sichten von körnigem Gut |
DE19948727A1 (de) * | 1999-10-09 | 2001-04-12 | Kloeckner Humboldt Wedag | Kreislaufmahleinrichtung mit Hochdruck-Walzenmühle und Sichter |
DE10221739A1 (de) * | 2002-05-16 | 2003-12-04 | Kloeckner Humboldt Wedag | Kreislaufmahlanlage mit Mühle und Sichter |
DE102008019830B4 (de) * | 2008-04-11 | 2019-01-24 | Khd Humboldt Wedag Gmbh | Umwälzmahlanlage mit außen liegenden Steigrohren |
CN202074778U (zh) * | 2011-03-17 | 2011-12-14 | 江苏海建股份有限公司 | 一种v型烘干系统 |
CN102335656B (zh) * | 2011-06-22 | 2014-03-12 | 江苏吉能达建材设备有限公司 | 四分离风选分级机 |
DE102011055762B4 (de) * | 2011-11-28 | 2014-08-28 | Maschinenfabrik Köppern GmbH & Co KG | Vorrichtung zum Sichten von körnigem Gut und Mahlanlage |
CN202460996U (zh) * | 2011-12-09 | 2012-10-03 | 中建材(合肥)粉体科技装备有限公司 | 双通道并列式静态选粉机 |
-
2015
- 2015-10-28 DE DE102015013892.8A patent/DE102015013892B3/de active Active
-
2016
- 2016-10-27 WO PCT/EP2016/075894 patent/WO2017072214A1/de active Application Filing
- 2016-10-27 CN CN201680062351.2A patent/CN108348923B/zh active Active
- 2016-10-27 EP EP16787859.4A patent/EP3368222B1/de not_active Not-in-force
Also Published As
Publication number | Publication date |
---|---|
WO2017072214A1 (de) | 2017-05-04 |
CN108348923A (zh) | 2018-07-31 |
DE102015013892B3 (de) | 2017-02-02 |
EP3368222B1 (de) | 2019-10-02 |
CN108348923B (zh) | 2020-03-03 |
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