EP3062930A1 - High-pressure roller press with deaeration of material to be comminuted - Google Patents
High-pressure roller press with deaeration of material to be comminutedInfo
- Publication number
- EP3062930A1 EP3062930A1 EP14793076.2A EP14793076A EP3062930A1 EP 3062930 A1 EP3062930 A1 EP 3062930A1 EP 14793076 A EP14793076 A EP 14793076A EP 3062930 A1 EP3062930 A1 EP 3062930A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- nip
- venting
- pressure roller
- roller press
- millbase
- 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
- 239000000463 material Substances 0.000 title claims abstract description 47
- 238000005056 compaction Methods 0.000 claims abstract description 19
- 238000000034 method Methods 0.000 claims abstract description 14
- 238000013022 venting Methods 0.000 claims description 26
- 238000000227 grinding Methods 0.000 claims description 8
- 239000007788 liquid Substances 0.000 claims description 4
- 239000012530 fluid Substances 0.000 description 2
- 239000008187 granular material Substances 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 238000009423 ventilation Methods 0.000 description 2
- 238000009736 wetting Methods 0.000 description 2
- 239000003082 abrasive agent Substances 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 238000005273 aeration Methods 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 230000001447 compensatory effect Effects 0.000 description 1
- 230000001186 cumulative effect Effects 0.000 description 1
- 238000004200 deflagration Methods 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 238000005243 fluidization Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000000306 recurrent effect Effects 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
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
- B02C4/00—Crushing or disintegrating by roller mills
- B02C4/02—Crushing or disintegrating by roller mills with two or more rollers
-
- 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
- B02C23/18—Adding fluid, other than for crushing or disintegrating by fluid energy
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C4/00—Crushing or disintegrating by roller mills
- B02C4/28—Details
- B02C4/286—Feeding devices
Definitions
- the invention relates to a high-pressure roller press for high-pressure comminution of millbase in a nip comprising two counter-rotating rollers which form a nip which the millbase to be comminuted passes under high pressure during comminution and forms a break in the structure of the millbase in the nip, and a feed device.
- a feed device which gives the material to be ground uniformly on the nip, wherein the volume of the abandoned ground material forms a Kompaktzone above the nip and a method for preventing vibrations in the task of ground material on a high-pressure roll press, which has a nip and an overlying feeder.
- High-pressure roller presses consist of at least two counter-rotating rollers forming a narrow nip between them, through which the material to be ground is pulled and subjected to a high pressing pressure in the nip.
- the millbase passes through more than one passage of the high-pressure roller press, from the circulating grinding material is always the fine-grained to dust-like millbase is selected by appropriate separation stages. If the circulating material in the circuit is very fine-grained or has a high proportion of fine-grained to dust-fine material to be ground, this can lead to vibrations in the high-pressure roller press.
- One cause of these vibrations is the high porosity of the material to be ground, which is formed by air inclusions in the fine material to be ground, the air inclusions are introduced by the classifier air in the separation stage in the material to be ground.
- Very fine ground material has a noticeably lower bulk density due to the disperse distribution in the air during precipitation.
- a vibrating device which extends up to the edge of the compaction zone or even into this.
- the vibrating device facilitates the de-aeration of the material to be ground, so that the air does not escape suddenly from the teilfluidinstrumentem regrind similar to a small deflagration, whereby the rollers of a high-pressure roller press rotate more uniformly and resonance vibration free.
- the vibratory device loosens the material to be ground, makes it easier to deflate and therefore avoids vibrations of the high-pressure roller press.
- a pressure screw is disclosed, which passes through the nachg screenende regrind until close to the compaction zone. In this zone, the fine ground material is conveyed from the circulation, where it mixes with the trailing coarse material to be ground. This type of Mahlgutholzgabe makes use of a compaction of the ground material by mixing fine and coarse material to be used.
- a venting device is provided immediately above the compaction zone between the rolls of a high-pressure roll press. This can be designed as a bell and protect the compaction zone in the upward direction before falling into the nip regrind. It is provided in this embodiment that the millbase flows past on the sides of the venting device designed as a bell. Since the ground material is partially fluidized after passage of a grinding circuit, this has a larger amount of adsorbed air and air trapped in the fluidizate. If regrind is now on the compaction zone, a venting device can absorb and discharge the escaping air. Thus, the vent works better and thus vibration can be avoided, can be provided in an advantageous embodiment that the vent is supported by negative pressure.
- Another alternative and cumulative measure for vacuum assist is to wet the stock just before it is drawn into the nip.
- the partially fluidized millbase collapses because capillary forces and wetting of the fine millbase particles lead to a compaction of the millbase or because the auxiliary grinding fluid introduced for moistening fills in spaces between the millbase granules of the millbase.
- the air suspended or adsorbed in the millbase escapes and can be collected by a collecting bell projecting into the millbase in the feed chute of a high-pressure roller press and sucked off through a vent line.
- This vent line may be connected to a vacuum line to assist in collapsing the partially fluidized millbase.
- a preferred embodiment of the high-pressure roller press has a height-adjustable ventilation device. This is located within the feeder, which is located above the nip of a high-pressure roller press. By the height adjustment, it is possible to control the amount of the millbase flowing on the nip per unit time. It is possible that the height adjustment is made manually, but it is also possible that the height adjustment is made as a control loop, being selected as the control input, the electrical power consumption of drive motors of the rollers of the high-pressure roller press or even amplitudes and frequencies of vibration measuring devices.
- FIG. 1 is a simple sketch of a roller press according to the invention with marked device for venting
- FIG. 1 shows a simple sketch of a high-pressure roller press according to the invention, which is represented by two fixed / idler rollers 1 and 2. It is a hard roller 2, which is firmly anchored in a not shown here machine frame and a Loswalze 1, which is characterized by the horizontal in the middle of the Loswalze 2 double arrow.
- the Loswalze 1 can perform compensatory movements, so that a passage of larger Mahlgut Swissen of lying between the two rolls 1, 2 roll gap WS is possible.
- Above the two rolls 1 and 2 is a feeding device 3, which is continuously filled with grinding stock 4 from above, and with such an amount per unit time that the Mahlgutapt within the feeder 3 remains approximately constant.
- a stationary roof 5 which protects an underlying venting device 6 before nachf passdem millbase 4 by itenfinifmitteddes regrind 4, which is protected within a bed in front of the abrasive material to be ground 4.
- the venting device 6 is adjustably adjusted in height within a bed, wherein in the vertical process two leg plates 6.1 and 6.2 extend and control the inflow of fresh material to be ground 4 in the Kompaktzone, which is illustrated by a drawn circle 4.1.
- a vacuum line 10 may be connected to the air discharge line 9, which builds up such a large negative pressure in the compaction zone 4.1 that not only suddenly escaping air flows quickly, but optionally the material to be ground 4 at the river between hard roller 2 and leg 6.2 or is vented at the river between Loswalze 1 and leg 6.1. The fine material to be ground 4 collapses and experiences a higher bulk density.
- the venting of the millbase 4 in the region of the compaction zone 4.1 avoids vibrations of the high-pressure roll press which arise due to recurrent escape of air from the millbase 4 and thus millbase 4 in the compaction zone 4.1 collapsed.
- the drives of the idler roller 2 and the hard roller 1 experience a lower driving resistance and the rollers 1, 2 become for a fraction of a second accelerated.
- the rollers 1 and 2 pull an increased amount of material to be ground 4 in the Kompaktzone 4.1 whereby the nip WS is temporarily overloaded and the two rollers 1 and 2 decelerates.
- the material to be ground 4 collapses again in the compaction zone 4.1, whereby a renewed cycle of acceleration and deceleration begins.
- the entire high-pressure roller press can start to vibrate.
- the inventive method namely the venting of the material to be ground 4 immediately above the Kompaktzone 4.1 these vibrations are avoided.
Landscapes
- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Crushing And Grinding (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102013018325.1A DE102013018325B4 (en) | 2013-10-31 | 2013-10-31 | High-pressure roller press with regrind removal and method for avoiding vibrations during the application of regrind |
PCT/EP2014/073282 WO2015063195A1 (en) | 2013-10-31 | 2014-10-30 | High-pressure roller press with deaeration of material to be comminuted |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3062930A1 true EP3062930A1 (en) | 2016-09-07 |
EP3062930B1 EP3062930B1 (en) | 2017-08-16 |
Family
ID=51846642
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP14793076.2A Active EP3062930B1 (en) | 2013-10-31 | 2014-10-30 | High-pressure roller press with deaeration of material to be comminuted |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP3062930B1 (en) |
DE (1) | DE102013018325B4 (en) |
DK (1) | DK3062930T3 (en) |
RU (1) | RU2675545C2 (en) |
WO (1) | WO2015063195A1 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN114100744A (en) * | 2021-11-26 | 2022-03-01 | 江门市艾米卫浴科技有限公司 | Bathroom hardware recycling equipment and operation method thereof |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
SU4860A1 (en) * | 1925-12-24 | 1928-03-31 | Н.И. Григорьев | Combined Mill for the preparation of coal dust |
US3069995A (en) * | 1960-05-04 | 1962-12-25 | Allis Chalmers Mfg Co | Compacting device |
US3029723A (en) | 1960-07-26 | 1962-04-17 | Allis Chalmers Mfg Co | Compacting device |
US3114930A (en) * | 1961-03-17 | 1963-12-24 | American Cyanamid Co | Apparatus for densifying and granulating powdered materials |
NL141100B (en) * | 1963-12-23 | 1974-02-15 | Akzo Nv | IMPROVEMENT OF AN ESTABLISHMENT FOR THE TREATMENT OF MULTI-FISH SUBSTANCES. |
SU1830664A1 (en) * | 1989-07-11 | 1996-10-20 | Научно-производственное объединение прикладной механики | Method and apparatus for fine mincing of coarse-minced raw meat material |
DE4003342A1 (en) * | 1990-02-05 | 1991-08-08 | Koeppern & Co Kg Maschf | Roller press for aerated solids - extracts surplus air into angled collector chambers laterally of vertical pass-line |
DE4126899A1 (en) * | 1991-08-14 | 1993-02-18 | Krupp Polysius Ag | METHOD AND APPENDIX FOR CRUSHING SPROEDEM GRILLS |
DE4228058C2 (en) * | 1992-08-24 | 1995-04-20 | Kloeckner Humboldt Deutz Ag | Plant and method for pressure treatment of granular goods |
DE102006025833A1 (en) | 2006-06-02 | 2007-12-06 | Khd Humboldt Wedag Gmbh | Roller press especially for comminution |
ITTO20070029A1 (en) * | 2007-01-18 | 2008-07-19 | Sasil S P A | HIGH COMPRESSION CYLINDER FOR GRINDING, AT VERY HIGH PUSH-LEVEL LEVELS OF NATURAL MINERALS AND INORGANIC SOLID PRODUCTS. |
DE202009014079U1 (en) | 2009-10-17 | 2009-12-31 | Khd Humboldt Wedag Gmbh | Roller press with device for pre-compacting the material to be ground |
-
2013
- 2013-10-31 DE DE102013018325.1A patent/DE102013018325B4/en active Active
-
2014
- 2014-10-30 EP EP14793076.2A patent/EP3062930B1/en active Active
- 2014-10-30 DK DK14793076.2T patent/DK3062930T3/en active
- 2014-10-30 RU RU2016115809A patent/RU2675545C2/en active
- 2014-10-30 WO PCT/EP2014/073282 patent/WO2015063195A1/en active Application Filing
Non-Patent Citations (2)
Title |
---|
None * |
See also references of WO2015063195A1 * |
Also Published As
Publication number | Publication date |
---|---|
DE102013018325A1 (en) | 2015-04-30 |
RU2016115809A3 (en) | 2018-06-28 |
RU2016115809A (en) | 2017-12-05 |
EP3062930B1 (en) | 2017-08-16 |
RU2675545C2 (en) | 2018-12-19 |
DK3062930T3 (en) | 2017-11-27 |
WO2015063195A1 (en) | 2015-05-07 |
DE102013018325B4 (en) | 2019-03-21 |
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