EP0227008B1 - Procédé et dispositif pour le fonctionnement d'une installation de broyage - Google Patents
Procédé et dispositif pour le fonctionnement d'une installation de broyage Download PDFInfo
- Publication number
- EP0227008B1 EP0227008B1 EP86117493A EP86117493A EP0227008B1 EP 0227008 B1 EP0227008 B1 EP 0227008B1 EP 86117493 A EP86117493 A EP 86117493A EP 86117493 A EP86117493 A EP 86117493A EP 0227008 B1 EP0227008 B1 EP 0227008B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- inert gas
- crushing plant
- gas
- main circuit
- circuit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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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
- 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
- B02C23/24—Passing gas through crushing or disintegrating zone
- B02C23/34—Passing gas through crushing or disintegrating zone gas being recirculated to crushing or disintegrating zone
Definitions
- the invention relates to a method for operating a grinding system in which the product and a carrier gas flow through the grinding system, in which the carrier gas is an inert gas and in the carrier gas after flowing through the grinding system and after its separation from the ground product in a main circuit is returned to the grinding plant.
- the invention also relates to a device for carrying out this method.
- Mills working with carrier gases are widely known.
- the carrier gas is swirled in grinding chambers in such a way that the product breaks apart mainly due to mutual collisions.
- Such comminution is much gentler than the comminution brought about by the grinding material coming into contact with stationary or rotating machine parts.
- an inert gas for example, as the carrier gas Use nitrogen (N2).
- N2 the carrier gas Use nitrogen
- the inert gas is fed to the mill instead of air.
- the ground material is separated from the inert carrier gas, which is blown off into the atmosphere.
- This mode of operation is associated with a high consumption of inert gas, and in particular if the comminution takes place predominantly in carrier gas vortices, the mills of this type have a high carrier gas requirement.
- a mill of the type mentioned in the opening paragraph is known from GB-A-1485448.
- inert gas is introduced into the product feed line in liquid form. This happens depending on the pressure. There is no possibility of a product-specific influence on the pressure prevailing in the inert gas circuit.
- the object of the present invention is to enable both inert gas monitoring (compensation of inert gas losses, oxygen content) and influence on the pressure prevailing in the inert gas circuit in a method for operating a grinding plant of the type mentioned at the outset.
- this object is achieved by the characterizing measures of claim 1. Because a partial flow of the inert gas is passed through a branch line in which the compressor and the adjustable throttle are located, not only can inert gas losses in the main circuit be compensated, but also optimal inert gas pressures can be set for the respective regrind.
- the carrier gas generally absorbs the heat generated during the grinding process, it is advantageous to bring the inert gas to a temperature desired for the respective grinding process before it is returned to the mill inside a cooler. If the inert gas has absorbed moisture during the grinding process, it is advisable remove the moisture before the gas re-enters the mill. This can be carried out in a separate dryer, but expediently in the cooler by simultaneously condensing the moisture.
- the grinding system shown comprises the mill 1, which via the feed funnel 2 the ground material and at 3 the inert gas, e.g. Nitrogen.
- the regrind-inert gas mixture leaves the mill 1 through the outlet 4 and flows through the line 5 to the cyclone separator 6.
- This separator 6 is followed by a further separator 7, which is designed as a filter cyclone.
- the regrind obtained in the separator 6 is transported by means of a screw 8 into a funnel 9, into which the regrind also passes from the filter cyclone 7.
- a cellular wheel sluice 11 serves to empty the funnel 9.
- the fan 14 is connected via line 13, which the inert gas via Feeds line 15 back to mill 1 and maintains the circulation flow.
- a cooler 16 is arranged in line 15, in which the inert gases are cooled to the desired mill inlet temperature.
- the cooler 16 can be designed such that it serves to dry the inert gases by condensation. Another possibility is to provide a separate dryer (not shown) in line 15.
- a branch line is provided parallel to line 15 and includes line sections 17 and 18.
- a dust filter 19, a compressor 21 and a storage tank 22 are arranged one after the other in the line section 17, into which a portion of the circulated inert gas passes.
- the compressed inert gas in the storage tank 22 can additionally serve to shake off the filter cyclone 7.
- line 25 with valve 26 is connected to line section 18, which leads to compressed air distributor 27 above filter cyclone 7.
- the filter bags located in the cyclone 7 are cleaned by pressure pulses. The inert gas used for this is also not lost since it is recycled.
- valve 31 is a control valve which is connected to an O2 measuring point 32 (32 ⁇ ) via the electrical line 33 (33 '). As soon as the measuring point registers oxygen values that exceed a maximum value (e.g. 8%), the valve 31 is opened and inert gas is metered in until a minimum value (e.g. 6%) is reached. The overpressure that may occur in the system is reduced via overpressure valves, not shown in detail.
- the oxygen measuring point should ideally be arranged directly in the main circuit. There, however, it is endangered by the dust content of the gas. It is therefore advisable to arrange them in a bypass to line 15, behind a dust filter. In the grinding system shown, it is in line section 17 behind dust filter 19 arranged, which simultaneously protects the compressor 21 from dust. Of course, other locations for the arrangement of the O2 measuring point in the grinding system are also conceivable. For example, it can be connected to line section 18 (see dashed line of measuring cell 32zelle).
Landscapes
- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Disintegrating Or Milling (AREA)
- Shovels (AREA)
- Adjustment And Processing Of Grains (AREA)
- Forklifts And Lifting Vehicles (AREA)
- Polishing Bodies And Polishing Tools (AREA)
- Constituent Portions Of Griding Lathes, Driving, Sensing And Control (AREA)
- Grinding-Machine Dressing And Accessory Apparatuses (AREA)
Claims (7)
- Procédé pour le fonctionnement d'une installation de broyage (1) dans lequel l'installation de broyage est traversée par le produit et par un gaz de support, dans lequel le gaz de support est un gaz inerte et dans lequel le gaz de support, après avoir traversé l'installation de broyage ainsi qu'après sa séparation du produit broyé, est renvoyé dans un circuit principal (15) menant à l'installation de broyage (1), caractérisé en ce qu'un courant partiel du gaz inerte, traversant un filtre à poussière (19), est comprimé à l'aide d'un compresseur (21), placé dans une dérivation (17, 18), à une pression supérieure à la pression du circuit principal (15) et en ce que du gaz inerte comprimé est renvoyé au circuit principal, par une vanne d'étranglement (23) réglable, commandée par la pression du gaz inerte dans le circuit principal.
- Procédé selon la revendication 1, caractérisé en ce que le gaz inerte est refroidi et/ou séché avant d'être renvoyé dans l'installation de broyage (1).
- Procédé selon la revendication 1 ou 2, caractérisé en ce que le gaz inerte comprimé à l'aide du compresseur (21), est utilisé aussi pour la mise en vibration d'un séparateur cyclone à filtre (7), monté derrière l'installation de broyage (1).
- Dispositif pour la mise en oeuvre du procédé de fonctionnement selon l'une des revendications 1, 2 ou 3, comportant une installation de broyage (1) fonctionnant avec un gaz inerte, comportant au moins un séparateur (6, 7), monté derrière l'installation de broyage (1) et comportant un circuit principal (15), équipé d'un ventilateur (14) pour le gaz inerte, caractérisé en ce que le circuit (15) est équipé d'une dérivation (17, 18) dans laquelle sont placés successivement un filtre à poussière (19), un compresseur (21) et une vanne d'étranglement (23) réglable, commandée par la pression régnant dans le circuit principal (15).
- Dispositif selon la revendication 4, caractérisé en ce qu'un réservoir d'accumulation (22) se trouve entre le compresseur (21) et la vanne d'étranglement (23).
- Dispositif selon la revendication 5, caractérisé en ce que l'un des séparateurs (7) monté derrière l'installation de broyage (1) est un cyclone à filtre, pouvant être mis en vibration par un gaz sous pression et équipé d'un distributeur de gaz (27) et en ce que le distributeur de gaz (27) est relié au réservoir d'accumulation (22), par un conduit (25) équipé d'une vanne (26).
- Dispositif selon la revendication 4, 5 ou 6, caractérisé en ce que pour contrôler la teneur en oxygène du gaz inerte envoyé dans le circuit, il est équipé d'un poste de mesure de O₂ (32), en ce que le poste de mesure de O₂ (32) est relié à une vanne de régulation (31) qui sert à doser le gaz inerte pur envoyé du réservoir d'accumulation (32) dans le circuit (15) et en ce que le poste de mesure de O₂ (32) est placé dans la dérivation (17, 18) derrière le filtre à poussière (19).
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT86117493T ATE65192T1 (de) | 1985-12-23 | 1986-12-16 | Verfahren und einrichtung zum betrieb einer mahlanlage. |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE3545828 | 1985-12-23 | ||
DE19853545828 DE3545828A1 (de) | 1985-12-23 | 1985-12-23 | Verfahren und einrichtung zum betrieb einer mahlanlage |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0227008A2 EP0227008A2 (fr) | 1987-07-01 |
EP0227008A3 EP0227008A3 (en) | 1988-04-20 |
EP0227008B1 true EP0227008B1 (fr) | 1991-07-17 |
Family
ID=6289406
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP86117493A Expired - Lifetime EP0227008B1 (fr) | 1985-12-23 | 1986-12-16 | Procédé et dispositif pour le fonctionnement d'une installation de broyage |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP0227008B1 (fr) |
AT (1) | ATE65192T1 (fr) |
DE (2) | DE3545828A1 (fr) |
ES (1) | ES2023808B3 (fr) |
Families Citing this family (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3734359A1 (de) * | 1987-10-10 | 1989-04-20 | Rheinische Braunkohlenw Ag | Verfahren zur erzeugung von braunkohlenstaub |
CH677455A5 (fr) * | 1988-01-14 | 1991-05-31 | Johann Georg Dr Schnitzer | |
DE4035730C2 (de) * | 1990-11-09 | 1993-10-14 | Loesche Gmbh | Verfahren und Vorrichtung zur Behandlung von feuchten Gas-Staub-Gemischen |
DE4300784C2 (de) * | 1993-01-14 | 2003-07-17 | Mewa Recycling Maschinen Und A | Verfahren und Vorrichtung zur Zerkleinerung von zu entsorgenden Geräten, die Hartschaum- oder Hartkunststoffe aufweisen |
EP0835881B2 (fr) † | 1996-10-14 | 2004-12-29 | Wolff Walsrode Ag | Procédé de préparation de poudre de méthylcellulose possédant une distribution granulométrique spéciale |
DE10152991A1 (de) * | 2001-10-26 | 2003-05-08 | Wolff Walsrode Ag | Verfahren und Vorrichtung zur Mahltrocknung |
DE102009044219A1 (de) * | 2009-10-09 | 2011-06-09 | Ventilatorenfabrik Oelde Gmbh | Verfahren und Einrichtung zum Zerkleinern von Feststoffen |
DE102011112741B4 (de) * | 2011-09-07 | 2015-09-03 | Werner Hofmann | Inertgasgedeckte geschlossene Mahl-und Siebanlage |
CN105944816B (zh) * | 2016-06-21 | 2018-04-20 | 江苏密友粉体新装备制造有限公司 | 一种安全防爆型气流粉碎系统 |
CN116078510A (zh) * | 2022-11-23 | 2023-05-09 | 苏州金远胜智能装备股份有限公司 | 一种防爆气流粉碎系统及控制方法 |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE136547C (fr) * | ||||
US3602164A (en) * | 1970-04-08 | 1971-08-31 | Harold Reintjes | Material reducing system having oxygen deficient atmosphere |
GB1485448A (en) * | 1974-11-11 | 1977-09-14 | Boc International Ltd | Comminuting combustible material |
-
1985
- 1985-12-23 DE DE19853545828 patent/DE3545828A1/de not_active Withdrawn
-
1986
- 1986-12-16 ES ES86117493T patent/ES2023808B3/es not_active Expired - Lifetime
- 1986-12-16 DE DE8686117493T patent/DE3680306D1/de not_active Expired - Fee Related
- 1986-12-16 AT AT86117493T patent/ATE65192T1/de not_active IP Right Cessation
- 1986-12-16 EP EP86117493A patent/EP0227008B1/fr not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
EP0227008A2 (fr) | 1987-07-01 |
DE3680306D1 (de) | 1991-08-22 |
DE3545828A1 (de) | 1987-07-02 |
ATE65192T1 (de) | 1991-08-15 |
EP0227008A3 (en) | 1988-04-20 |
ES2023808B3 (es) | 1992-02-16 |
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