EP0679722B1 - Verfahren zur Steuerung des Nutzungsgrades einer diskontinuierlich arbeitenden Zuckerzentrifuge - Google Patents
Verfahren zur Steuerung des Nutzungsgrades einer diskontinuierlich arbeitenden Zuckerzentrifuge Download PDFInfo
- Publication number
- EP0679722B1 EP0679722B1 EP95106267A EP95106267A EP0679722B1 EP 0679722 B1 EP0679722 B1 EP 0679722B1 EP 95106267 A EP95106267 A EP 95106267A EP 95106267 A EP95106267 A EP 95106267A EP 0679722 B1 EP0679722 B1 EP 0679722B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- layer
- centrifuge
- drum
- washing liquid
- crystals
- 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
Links
- 238000000034 method Methods 0.000 title claims description 20
- 238000005406 washing Methods 0.000 claims abstract description 31
- 239000007787 solid Substances 0.000 claims abstract description 9
- 239000007788 liquid Substances 0.000 claims description 22
- 238000005259 measurement Methods 0.000 claims description 12
- 235000020357 syrup Nutrition 0.000 claims description 10
- 239000006188 syrup Substances 0.000 claims description 9
- 239000000463 material Substances 0.000 claims description 5
- 239000000203 mixture Substances 0.000 claims description 4
- 238000002604 ultrasonography Methods 0.000 claims description 2
- 230000001419 dependent effect Effects 0.000 claims 4
- 239000012530 fluid Substances 0.000 abstract 1
- 239000013078 crystal Substances 0.000 description 44
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 19
- 238000004321 preservation Methods 0.000 description 8
- 238000004140 cleaning Methods 0.000 description 6
- 150000001875 compounds Chemical class 0.000 description 4
- 239000000523 sample Substances 0.000 description 3
- 238000004590 computer program Methods 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000005119 centrifugation Methods 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000012065 filter cake Substances 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 238000004886 process control Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000001953 recrystallisation Methods 0.000 description 1
- 239000012047 saturated solution Substances 0.000 description 1
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C13—SUGAR INDUSTRY
- C13B—PRODUCTION OF SUCROSE; APPARATUS SPECIALLY ADAPTED THEREFOR
- C13B30/00—Crystallisation; Crystallising apparatus; Separating crystals from mother liquors ; Evaporating or boiling sugar juice
- C13B30/04—Separating crystals from mother liquor
- C13B30/06—Separating crystals from mother liquor by centrifugal force
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
- B04B—CENTRIFUGES
- B04B11/00—Feeding, charging, or discharging bowls
- B04B11/04—Periodical feeding or discharging; Control arrangements therefor
- B04B11/043—Load indication with or without control arrangements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
- B04B—CENTRIFUGES
- B04B15/00—Other accessories for centrifuges
- B04B15/12—Other accessories for centrifuges for drying or washing the separated solid particles
Definitions
- the invention relates to a method for controlling the degree of utilization a discontinuous sugar centrifuge for treating a filling compound in the form of a solid-liquid mixture, in which the filling compound, and a washing liquid via a nozzle assembly, quantity-adjustable in the centrifuge drum.
- Fill quantities of discontinuous centrifuge drums can be adjusted by touch contacts, such as. B. feeler wheel, Push button, dynamic pressure meter, by measuring the energy consumption during filling, by capacitive measurements. Thereby can both avoid overfilling the drum and in the case of sugar centrifuges, a predetermined layer thickness of crystals can be adjusted according to the composition of the magma during the setting process.
- the determination of the thickness of the crystals can be measured manually by measuring the distance from Inner edge of lid to top edge of crystallized layer, at centrifuge before the start of the broaching process.
- EP 0 406 095 A1 describes the optimization of the washing process a sugar centrifuge suggested adding the washing liquid to control over a time measurement.
- the amount of washing liquid added was kept constant and the time of addition is changed.
- the wash liquid volume can be proportional to the load the centrifuge at the time the sugar addition is stopped to be changed.
- EP 0 406 094 is a further development of EP 0 406 095 and discloses a method of operating a sugar centrifuge, which in addition to the teaching of EP 0 406 095 is also taken into account for determining the washing liquid supply and Washing time finds that the layer thickness of the crystals the drum wall after closing the filling material supply grows.
- the invention has for its object a method for Operating a discontinuous sugar centrifuge to create with which an unprecedented insight into the complex and fast-moving processes within guaranteed by a centrifuge drum and by appropriate Allocation of the values to be measured is also fully automatic Program run with optimal economy become.
- a centrifuge control can be created with a corresponding computer program via a data connection an internal and / or external process control system assigned. It is also possible to use the respective Filling quantity depending on the data of the to be introduced Fill mass to regulate, in addition, the degree of use the centrifuge can be optimized.
- the cleaning process is carried out by washing with water. By however, the washing process becomes part of the water soluble Crystallized solid present redissolved.
- the amount of washing liquid is measured by measuring the deposited layer of crystals after separating the syrup, it is possible to The amount of washing liquid to be added to a minimum to reduce and thus to the greatest possible degree of crystal preservation to get.
- the degree of crystal preservation is defined by the after the washing process in the centrifuge remaining amount of crystals in percent, based on the amount of crystals contained in the supplied magma.
- the invention Procedure is not applicable in this regard limited for sugar centrifuges, but is applicable for the centrifugation of solids with subsequent Treatment with a washing liquid, in which the too treating solids in the washing liquid used are solvable.
- the method according to the invention enables connection with an appropriately trained electronic programmable logic controller Control an optimal adjustment the particular nature of the feed and a complete documentation of the centrifuge work.
- a centrifuge centrifuge drum 1 consists of a perforated drum jacket 2, which on the inside with a liquid-permeable filter covering is, a drum cover 3, a drum base 4 and one Hub 5.
- a nozzle stick 17 belonging washing water pipe 6 with flat jet nozzles 7 introduced from which water in the form of water curtains 8 are sprayed onto the magma layer 9 for a non-contact measurement of the thickness of the magma layer 9 is a device 10 with an ultrasound probe 11 introduced into the centrifugal drum 1.
- the wash water pipe 6 is by means of two clutches 12 and 13 and one flexible section 14, e.g. B. a hose to a wash water supply line 15 connected.
- the flexible Section 14 enables adjustment via a slide 20 of the nozzle assembly 17 by means of a servo motor 16 in Direction of arrows A.
- the filling compound is placed over a filling pipe 18 with filler 19 introduced into the centrifugal drum 1.
- the crystallizate layer h k1 results, the volume of use of which is calculated from its volume, taking into account its specific weight and with reference to the crystal content of the magma filled into the drum 1.
- washing water Since 1 kg of washing water dissolves approx. 3 kg of crystals, the amount of water must be reduced to a minimum to increase the degree of crystal preservation. For optimal cleaning of the crystals, it is important to distribute the wash water evenly over the surface of the crystals. Since after approx. 50 mm penetration depth the washing water forms a saturated solution in the crystallizate layer, which can then perform cleaning work without further dissolution, i.e. it carries off residual syrup adhering to the crystals, it is advisable to work with a large crystallizate layer thickness and the amount of washing water not to be added in% to the quantity of magma filled in, but in kg per m 2 of crystallized surface.
- Nozzle pipes to which the spray nozzles are attached usually fixed or difficult to adjust arranged so that no adjustment is made in practice.
- An easy adjustment option of the washing water pipe 6 by means of a servo motor 6 a slide rail 20 with distance markings is to be provided. The distance is calculated by the computer based on the crystal layer measurement specified and the servo motor accordingly controlled.
Landscapes
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Biochemistry (AREA)
- Organic Chemistry (AREA)
- Centrifugal Separators (AREA)
- Saccharide Compounds (AREA)
Description
- in einem ersten Schritt die Füllmasse, und über einen Düsenstock eine Waschflüssigkeit, mengenregelbar in die Zentrifugentrommel eingegeben werden und während des Betriebes die Schichtdicke einer sich auf den Trommelwänden ablagernden Kristallisatschicht berührungsfrei gemessen wird;
- in einem zweiten Schritt in Abhängigkeit von einer vorgebbaren Sollschichtdicke für die sich ablagernde Kristallisatschicht die Füllmassenzufuhr geregelt wird; und anschließend
- in einem dritten Schritt in Abhängigkeit von der nach Abtrennung des Sirups gemessenen Dicke der Kristallisat-Schicht hk1 die Zufuhr der Waschflüssigkeitsmenge geregelt wird, wobei die auf zugebende Waschflüssigkeitsmenge in Abhängigkeit von der aus der Schichtdickenmessung errechneten Oberfläche der Kristallisat-Schicht zugeführt wird, wodurch dann eine reduzierte Kristallisat-Schicht hk2 erhalten wird.
Volumen aus Kristallschicht hk1 | 0,75 m3 |
Kristallisatmenge bei y = lkg/dm3 | 750 kg |
Kristallgehalt des Magma | 53 % |
Trommelfüllung = 750 : 0,53 = Nutzungsgrad bei 1.750 kg Nennleistung | 1.415 kg |
Claims (3)
- Verfahren zur Steuerung des Nutzungsgrades einer diskontinuierlich arbeitenden Zuckerzentrifuge zur Behandlung einer Füllmasse in Form eines Feststoff-Flüssigkeits-Gemisches, wobeiin einem ersten Schritt die Füllmasse, und über einen Düsenstock eine Waschflüssigkeit, mengenregelbar in die Zentrifugentrommel eingegeben werden und während des Betriebes die Schichtdicke einer sich auf den Trommelwänden ablagernden Kristallisatschicht berührungsfrei gemessen wird;in einem zweiten Schritt in Abhängigkeit von einer vorgebbaren Sollschichtdicke für die sich ablagernde Kristallisatschicht die Füllmassenzufuhr geregelt wird; und anschließendin einem dritten Schritt in Abhängigkeit von der nach Abtrennung des Sirups gemessenen Dicke der Kristallisat-Schicht hk1 die Zufuhr der Waschflüssigkeitsmenge geregelt wird, wobei die auf zugebende Waschflüssigkeitsmenge in Abhängigkeit von der aus der Schichtdickenmessung errechneten Oberfläche der Kristallisat-Schicht zugeführt wird, wodurch dann eine reduzierte Kristallisat-Schicht hk2 erhalten wird.
- Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß die berührungsfreie Schichtdickenmessung innerhalb der Schleudertrommel mittels einer Ultraschall-weg-Messung erfolgt.
- Verfahren nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die Zugabe der Waschflüssigkeit über einen Düsenstock mit mehreren gleichmäßig verteilten Einzeldüsen erfolgt und der Abstand des Düsenstocks zur Oberfläche der sich auf der Trommelwandung ablagernden Feststoffschicht, bezogen auf die Düsenmündungen, in Abhängigkeit von der gemessenen Schichtdicke der Feststoffschicht eingestellt wird.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE4414602A DE4414602A1 (de) | 1994-04-27 | 1994-04-27 | Verfahren zur Steuerung des Nutzungsgrades einer diskontinuierlich arbeitenden Zentrifuge, insbesondere einer Zuckerzentrifuge |
DE4414602 | 1994-04-27 |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0679722A2 EP0679722A2 (de) | 1995-11-02 |
EP0679722A3 EP0679722A3 (de) | 1998-05-27 |
EP0679722B1 true EP0679722B1 (de) | 2000-11-15 |
Family
ID=6516516
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP95106267A Expired - Lifetime EP0679722B1 (de) | 1994-04-27 | 1995-04-26 | Verfahren zur Steuerung des Nutzungsgrades einer diskontinuierlich arbeitenden Zuckerzentrifuge |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP0679722B1 (de) |
AT (1) | ATE197612T1 (de) |
DE (2) | DE4414602A1 (de) |
DK (1) | DK0679722T3 (de) |
ES (1) | ES2151937T3 (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2013135774A1 (de) | 2012-03-14 | 2013-09-19 | Bma Braunschweigische Maschinenbauanstalt Ag | Vorrichtung mit einer diskontinuierlich arbeitenden zentrifuge zum abtrennen von sirup aus zuckerfüllmassen und verfahren zum betrieb einer solchen vorrichtung |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1998030887A1 (en) * | 1997-01-08 | 1998-07-16 | Bristol-Myers Squibb Company | Apparatus and methods for preparing blood or plasma component solutions of known concentration |
DE19716129C1 (de) * | 1997-04-17 | 1998-10-15 | Krauss Maffei Ag | Filterzentrifuge |
US6063292A (en) * | 1997-07-18 | 2000-05-16 | Baker Hughes Incorporated | Method and apparatus for controlling vertical and horizontal basket centrifuges |
GB0310403D0 (en) * | 2003-05-07 | 2003-06-11 | Broadbent & Sons Ltd Thomas | Improvements in and relating to the control of centrifuges |
DE102008062055B4 (de) | 2008-12-12 | 2021-07-22 | Gea Mechanical Equipment Gmbh | Verfahren zur Überwachung der automatisierten Entleerung einer Zentrifuge |
ATE523257T1 (de) * | 2009-07-16 | 2011-09-15 | Bws Technologie Gmbh | Diskontinuierliche zentrifuge mit einer waschsteuerungseinrichtung und ein verfahren zum betreiben der zentrifuge. |
ATE533561T1 (de) * | 2009-07-16 | 2011-12-15 | Bws Technologie Gmbh | Diskontinuierliche zentrifuge mit einer füllgutmengensteuerung und ein verfahren zum betreiben der zentrifuge |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE6900504U (de) * | 1969-01-02 | 1969-05-29 | Johannes Dr Wolf | Geraet zum verteilen von gestauter warmluft in wohnraumen |
DE3066685D1 (en) * | 1980-07-01 | 1984-03-29 | Fives Cail Babcock | Centrifugal dryer with cylindrical bowl provided with a load control and a washing device |
DE3515915C2 (de) * | 1985-05-03 | 1993-10-14 | Braunschweigische Masch Bau | Überwachungsverfahren und Vorrichtung zur Kontrolle des Sirupablaufes bei periodisch arbeitenden Zuckerzentrifugen |
DE3615013C1 (en) * | 1986-05-02 | 1987-06-11 | Krauss Maffei Ag | Method for monitoring the drying phase in filtration centrifuges |
FR2623612B1 (fr) * | 1987-11-23 | 1991-07-26 | Francaise Sucrerie | Procede de mesure de l'epaisseur d'un depot solide sur les parois d'une centrifugeuse, les moyens pour sa mise en oeuvre et leur application particuliere en sucrerie |
DE3822225C1 (de) * | 1988-07-01 | 1989-07-20 | Laboratorium Prof. Dr. Rudolf Berthold, 7547 Wildbad, De | |
FR2649909B1 (de) * | 1989-06-29 | 1993-05-21 | Fives Cail Babcock |
-
1994
- 1994-04-27 DE DE4414602A patent/DE4414602A1/de not_active Withdrawn
-
1995
- 1995-04-26 DE DE59508848T patent/DE59508848D1/de not_active Expired - Lifetime
- 1995-04-26 EP EP95106267A patent/EP0679722B1/de not_active Expired - Lifetime
- 1995-04-26 AT AT95106267T patent/ATE197612T1/de not_active IP Right Cessation
- 1995-04-26 ES ES95106267T patent/ES2151937T3/es not_active Expired - Lifetime
- 1995-04-26 DK DK95106267T patent/DK0679722T3/da active
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2013135774A1 (de) | 2012-03-14 | 2013-09-19 | Bma Braunschweigische Maschinenbauanstalt Ag | Vorrichtung mit einer diskontinuierlich arbeitenden zentrifuge zum abtrennen von sirup aus zuckerfüllmassen und verfahren zum betrieb einer solchen vorrichtung |
Also Published As
Publication number | Publication date |
---|---|
DE59508848D1 (de) | 2000-12-21 |
DE4414602A1 (de) | 1995-11-02 |
ATE197612T1 (de) | 2000-12-15 |
EP0679722A3 (de) | 1998-05-27 |
ES2151937T3 (es) | 2001-01-16 |
DK0679722T3 (da) | 2001-02-26 |
EP0679722A2 (de) | 1995-11-02 |
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