EP2125236A1 - Verfahren zum betreiben einer schlagradmühle und steuergerät zur steuerung einer schlagradmühle - Google Patents
Verfahren zum betreiben einer schlagradmühle und steuergerät zur steuerung einer schlagradmühleInfo
- Publication number
- EP2125236A1 EP2125236A1 EP08734747A EP08734747A EP2125236A1 EP 2125236 A1 EP2125236 A1 EP 2125236A1 EP 08734747 A EP08734747 A EP 08734747A EP 08734747 A EP08734747 A EP 08734747A EP 2125236 A1 EP2125236 A1 EP 2125236A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- power consumption
- time average
- sliding time
- threshold
- drive
- 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
- B02C25/00—Control arrangements specially adapted for crushing or disintegrating
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C13/00—Disintegrating by mills having rotary beater elements ; Hammer mills
- B02C13/10—Disintegrating by mills having rotary beater elements ; Hammer mills with horizontal rotor shaft and axial flow
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C2210/00—Codes relating to different types of disintegrating devices
- B02C2210/01—Indication of wear on beaters, knives, rollers, anvils, linings and the like
Definitions
- the feeder is placed in front of the beater mill and crushes the lignite before it enters the beater mill.
- the suggestor consists of a plurality of radially arranged to a rotational axis of the impact arms, at the outer ends of club heads are arranged. These solidly designed clubheads are usually made of steel and are exposed to heavy wear by the abrasive components of lignite. They are therefore releasably connected to the impact arms, so that they can be replaced after reaching the maximum allowable wear.
- club heads are replaced after 1,500-3,000 hours of operation.
- the time of replacement of the club heads according to experience for example, an operating time of 1,800 hours, set.
- the invention has for its object to provide a method for operating a beater mill with a suggestive, which allows optimal utilization of the life of the club heads and at the same time offers a high level of security against too long operation of the club heads.
- the method according to the invention should adequately take into account the dependence of the service life of the club heads on the coal used and other external agents.
- the object underlying the invention is achieved according to the invention in a method for operating a proposal of a beater mill, wherein the proposer has a plurality of plunger heads, characterized in that the power consumption of the drive of the proposer is detected and that determines the wear of the plunger heads in dependence of the power consumption of the drive becomes.
- the method according to the invention is also very cost-effective to realize, since only the power consumption of the drive of the proposer is required as input to the process.
- the power consumption is, if it is not already detected anyway, easy to capture, so that the hardware requirements in the form of sensors and signal lines are very low.
- a sliding time average of the power consumption is formed, that the sliding time average of the power consumption is compared with a first threshold and that a first warning message is issued when the sliding time average of the power consumption of the first Threshold I W am undershot.
- This averaging acts as a low-pass filter, so that short-term fluctuations in power consumption do not lead to the issue of a warning message. This can cause short-term fluctuations in power consumption, such as those be caused by short-term fluctuations in the composition of the coal or due to other disturbing influences are filtered out.
- a second warning message is output, which includes not only an optical but also an acoustic signal, for example.
- the operator of the power plant is unequivocally pointed to the required replacement of the club heads.
- the method according to the invention can automatically shut down even after falling below a further third threshold value, the beater wheel mill. As a result, damage to the periphery of the club heads, in particular to the Shock and other components safely prevented. It goes without saying that usually should not be reached this third threshold, but after issuance of the first warning, the replacement of the club heads can be prepared and planned so that immediately with the appearance of the second warning or shortly before the club heads can be replaced.
- the drive of the proposer is designed as an electric drive with an electric motor.
- the time interval, starting in the present, is extended into the recent past, so that the moving time average determined in this way reflects the state of the club heads as promptly as possible.
- FIG. 2 is an isometric view of a mill door and a proposer
- Figure 3 shows the relationship between wear of the club heads and power consumption of the proposal.
- FIG. 4 shows a flow chart of an exemplary embodiment of a method according to the invention.
- FIG. 1 a beater wheel mill known from the prior art is shown cut with a suggestor.
- a mill housing 1 a striking wheel 2 is arranged. Storage and drive of the striking wheel 2 are not shown in Figure 1.
- This suggestor consists essentially of a Vorellerrotor 3.
- the Vorellerrotor 3 in turn consists of impact arms 3.1, which extend radially outward.
- At the outer ends of the beater arms 3.1 Schlagarmköpfe 3.2 are releasably attached.
- a plurality of beater arms 3.1 can be arranged one behind the other in the axial direction.
- the proposer 3 is also stored on the fly.
- the associated storage has the reference numeral 7th
- the Vortrainrrotor 3 is driven by an electric motor 5.
- the storage of the proposal and the drive motor 5 are arranged in a frame 6.
- FIG. 2 shows a mill door 9 with the advancing rotor 3 and the associated shaft 10, which is part of the bearing 7.
- the shape of the beater arms 3.1 and the beater heads 3.2 can be clearly seen.
- the proposal heads 3.2 are made of a wear-resistant material, in particular steel, and are characterized by the abrasive components of the brown coal to be crushed with continuous operating time smaller and smaller. In addition, naturally all edges that cause a particularly effective comminution of brown coal, removed and the shape of the proposal heads is always "streamlined". As a result, the efficiency of the pre-crushing by the suggestor decreases, so that the power consumption of the motor 5 decreases. This relationship is shown in FIG. 3 in diagram form.
- the wear On the X-axis, the wear, corresponding to a weight loss in kilograms of the proposal heads applied.
- the current consumption of the motor 5 On the Y-axis, the current consumption of the motor 5 is shown. As can be seen from FIG. 3, there is a clear correlation between the current consumption and the weight loss of the proposal head. This effect makes use of the method according to the invention, in that the current consumption of the motor 5 is detected, preferably over a sliding time average, and compared with one or more threshold values.
- a first warning signal is output, so that the operating team of the power plant knows that the proposal heads have almost reached the end of their life.
- FIG. 4 shows a flow diagram of the method according to the invention.
- the procedure starts in a starting block.
- a first step 15 the power consumption of the motor 5 is detected and formed a sliding time average Imttei.
- this moving time average iMittei is compared with a first threshold I "am. If the moving time average I M is greater than the first threshold, the process branches again before the first block 15. Otherwise, a first warning is output in a third block 19.
- a fourth block 21 it is compared whether the power consumption Imttei smaller than a second threshold Imax. is shame. If this is not the case, the process branches back behind the starting block. Otherwise, a second warning message is output in a fifth block 23.
- the method passes through a sixth block 25.
- this sixth block it is checked whether the power consumption Ijuttei is less than a third threshold lAbschaitung. If no, the program branches again behind the start block. Otherwise, in a seventh block 27, the beater wheel mill is turned off. Then the procedure ends.
Landscapes
- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Crushing And Grinding (AREA)
- Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
- Percussive Tools And Related Accessories (AREA)
- Earth Drilling (AREA)
Abstract
Description
Claims
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PL08734747T PL2125236T3 (pl) | 2007-03-23 | 2008-03-25 | Sposób sterowania działaniem młyna z kołami bijakowymi i urządzenie sterujące do sterowania młynem z kołami bijakowymi |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102007014129A DE102007014129A1 (de) | 2007-03-23 | 2007-03-23 | Verfahren zum Betreiben einer Schlagradmühle und Steuergerät zur Steuerung einer Schlagradmühle |
| PCT/EP2008/002337 WO2008116624A1 (de) | 2007-03-23 | 2008-03-25 | Verfahren zum betreiben einer schlagradmühle und steuergerät zur steuerung einer schlagradmühle |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP2125236A1 true EP2125236A1 (de) | 2009-12-02 |
| EP2125236B1 EP2125236B1 (de) | 2018-10-17 |
Family
ID=39590775
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP08734747.2A Active EP2125236B1 (de) | 2007-03-23 | 2008-03-25 | Verfahren zum betreiben einer schlagradmühle und steuergerät zur steuerung einer schlagradmühle |
Country Status (8)
| Country | Link |
|---|---|
| US (1) | US8104700B2 (de) |
| EP (1) | EP2125236B1 (de) |
| CN (1) | CN101641159B (de) |
| AU (1) | AU2008232025B2 (de) |
| CA (1) | CA2680341C (de) |
| DE (1) | DE102007014129A1 (de) |
| PL (1) | PL2125236T3 (de) |
| WO (1) | WO2008116624A1 (de) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10655851B2 (en) | 2016-12-02 | 2020-05-19 | General Electric Technology Gmbh | System and method for preheating a beater mill |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2821637A1 (de) * | 1978-05-18 | 1979-11-22 | Babcock Ag | Geblaeseschlaegermuehle |
| DE3136323A1 (de) * | 1981-09-12 | 1983-03-31 | Boehringer Mannheim Gmbh, 6800 Mannheim | Verfahren zum betreiben einer kugelmuehle und entsprechende kugelmuehle |
| SE456138B (sv) * | 1987-09-10 | 1988-09-12 | Boliden Ab | Forfarande for reglering av krosspaltbredden i en gyratorisk kross |
| DD301241A7 (de) * | 1990-01-02 | 1992-11-05 | Energiewerke Schwarze Pumpe Ag,De | Einrichtung zur grenzwertanzeige des schlagplattenverschleisses an schlagraedern |
| DE19518390C2 (de) * | 1995-05-19 | 1999-02-18 | Inofex Gmbh | Verfahren und Schaltungsanordnung zur Steuerung und Regelung eines Antriebssystems für die Verarbeitung eines Rohstoffes, vorzugsweise für Fleischereimaschinen |
| FI20021327L (fi) * | 2002-07-05 | 2004-01-06 | Metso Minerals Tampere Oy | Menetelmä ja laitteisto murskaimen asetuksen mittaamiseksi ja säätämiseksi |
| US6467707B1 (en) * | 2000-10-05 | 2002-10-22 | Robert M. Williams | Control logic for use in controlling grinding mill systems |
| SE524784C2 (sv) * | 2003-02-10 | 2004-10-05 | Sandvik Ab | Sätt och anordning för styrning av kross samt visarinstrument för indikering av belastning av kross |
| US7028931B2 (en) * | 2003-11-03 | 2006-04-18 | Riley Power, Inc. | Dynamic ring classifier for a coal pulverizer |
-
2007
- 2007-03-23 DE DE102007014129A patent/DE102007014129A1/de not_active Withdrawn
-
2008
- 2008-03-25 PL PL08734747T patent/PL2125236T3/pl unknown
- 2008-03-25 CA CA2680341A patent/CA2680341C/en not_active Expired - Fee Related
- 2008-03-25 US US12/532,440 patent/US8104700B2/en active Active
- 2008-03-25 EP EP08734747.2A patent/EP2125236B1/de active Active
- 2008-03-25 AU AU2008232025A patent/AU2008232025B2/en not_active Expired - Fee Related
- 2008-03-25 CN CN2008800094942A patent/CN101641159B/zh not_active Expired - Fee Related
- 2008-03-25 WO PCT/EP2008/002337 patent/WO2008116624A1/de not_active Ceased
Non-Patent Citations (1)
| Title |
|---|
| See references of WO2008116624A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CA2680341A1 (en) | 2008-10-02 |
| DE102007014129A1 (de) | 2008-09-25 |
| US8104700B2 (en) | 2012-01-31 |
| WO2008116624A1 (de) | 2008-10-02 |
| AU2008232025B2 (en) | 2010-11-25 |
| AU2008232025A1 (en) | 2008-10-02 |
| PL2125236T3 (pl) | 2019-01-31 |
| CN101641159B (zh) | 2013-07-24 |
| CA2680341C (en) | 2013-02-05 |
| EP2125236B1 (de) | 2018-10-17 |
| US20100108789A1 (en) | 2010-05-06 |
| CN101641159A (zh) | 2010-02-03 |
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