EP0132420A1 - Verfahren zur Diffusionswasserheizung für Zuckerrübenextraktion und Vorrichtung zur Durchführung dieses Verfahrens - Google Patents

Verfahren zur Diffusionswasserheizung für Zuckerrübenextraktion und Vorrichtung zur Durchführung dieses Verfahrens Download PDF

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Publication number
EP0132420A1
EP0132420A1 EP84401200A EP84401200A EP0132420A1 EP 0132420 A1 EP0132420 A1 EP 0132420A1 EP 84401200 A EP84401200 A EP 84401200A EP 84401200 A EP84401200 A EP 84401200A EP 0132420 A1 EP0132420 A1 EP 0132420A1
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EP
European Patent Office
Prior art keywords
gases
tower
heated
waters
water
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
Application number
EP84401200A
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English (en)
French (fr)
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EP0132420B1 (de
Inventor
Paul Credoz
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fives Cail Babcock SA
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Fives Cail Babcock SA
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Filing date
Publication date
Application filed by Fives Cail Babcock SA filed Critical Fives Cail Babcock SA
Priority to AT84401200T priority Critical patent/ATE21934T1/de
Publication of EP0132420A1 publication Critical patent/EP0132420A1/de
Application granted granted Critical
Publication of EP0132420B1 publication Critical patent/EP0132420B1/de
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    • C—CHEMISTRY; METALLURGY
    • C13—SUGAR INDUSTRY
    • C13B—PRODUCTION OF SUCROSE; APPARATUS SPECIALLY ADAPTED THEREFOR
    • C13B10/00—Production of sugar juices
    • C13B10/08—Extraction of sugar from sugar beet with water
    • C13B10/12—Details of extraction apparatus, e.g. arrangements of pipes or valves

Definitions

  • the present invention relates to sugar beet sweets where, as is known, the sugar is extracted from beets, cut into cossettes, by methodical leaching against the current by means of hot water, in an apparatus called a diffuser. On leaving the diffuser, one obtains, on the one hand, pulps which are pressed and dried and sweet juices which are purified, then concentrated by evaporation, and finally subjected to crystallization in cooking appliances.
  • the object of the present invention is to improve the thermal balance of sugar beet sweets by better recovery of the sensible heat and of the latent heat of condensation of the wet exhaust gases from the pulp dryer and from the carbonation devices.
  • part of the sensible heat and the latent heat of condensation of the wet exhaust gases from the pulp dryer and / or the carbonation apparatuses are used to heat the pulp pressing waters and the waste waters. 'extra used for broadcasting.
  • the invention there is a very large quantity of hot water, which was usually used to warm the diffusion water, and which can be used to heat the limed juice and cold diffusion juice.
  • the water to be heated will be brought into contact with the said gases in a washing tower to carry out a direct heat exchange.
  • This solution makes it possible to simultaneously ensure at least partial acidification of the diffusion waters and the purification of the gases.
  • Ca ++ ions may be added, in particular in the form of lime or calcium carbonate, to the water to be heated, before it is brought into contact with the gases, to allow the elimination of at least part of the sulfur oxides. contained in the gases by formation of sulphites and calcium sulphates, and possibly facilitate the pressing of the pulps.
  • the gases will be purified before being brought into contact with the waters to be heated.
  • a washing liquor for example water charged with Ca ++ ions, which will then be partly recycled and partly subjected to decantation to separate a liquid, which will be rejected, from the sludges which will be mixed. to the water to be heated.
  • the washing tower used for bringing the gases and the water into contact will advantageously include a series of baffles inclined and spaced vertically from one another so that the water to be heated, brought to the upper part of the tower, trickle down these baffles and tom bent in rain from a baffle on the baffle placed below, the gases admitted to the lower part of the tower moving from bottom to top, in opposite direction to the waters.
  • the installation shown diagrammatically in FIG. 1 comprises a diffusion apparatus 10, a pulp press 12, a washing tower 14, a pulp dryer 16, tanks 18 and 20 and exchangers 22, 24 and 26.
  • the beet pods enter at A at one end of the diffuser 10.
  • sweet juice relatively cold
  • is extracted which is heated in the exchanger 22 by means of hot water from the evaporators used for the concentration of the juice. .
  • these waters gave way in the sample geur 24 part of their calories in limed juice which is then sent to a carbonation apparatus 25.
  • Tower 14 has a circular section and comprises in its upper part an annular distributor 30 and a series of frustoconical baffles 32 inclined and spaced apart vertically from one another so that the water supplying the distributor flows overflowing onto the upper chicane, trickle along it, then fall in rain on the chicane below and thus descend from chicane to chicane to the bottom of the tower.
  • the waters meet hot and humid gases circulating from bottom to top in the tower.
  • the gases come from the pulp dryer 16.
  • the waters heat up by absorbing part of the sensible heat of the gases and the latent heat of condensation from a portion of the water vapor contained. in these gases.
  • the heated and acidified water is sent by a pump 34 to the tank 18.
  • the exchanger 26 heated by va fear taken from an evaporator, keeps the water temperature at a set value.
  • the operating conditions of the washing tower are chosen so that the amount of heat supplied by this exchanger is very low or even zero during normal operation.
  • the pH of the water is adjusted in a conventional manner, by adding sulfuric acid, in the tank 18.
  • the cooled gases are evacuated to the upper part of the tower 14 by a chimney 36. They can be recycled in the pulp dryer or sent to an exchanger to heat the air used for pre-drying the pulps.
  • the invention provides a very large supplement of hot water for reheating cold diffusion juices and limed juices.
  • hot water for a plant having, with the conventional process of heating diffusion waters, 350 kg of water at 95 ° per tonne of beet, it will be possible, thanks to the invention, to 850 kg / TB of water at the same temperature.
  • the amount of heat recovered will be of the order of 13 to 15 therms per tonne of beet, which represents a saving of 5 to 5.5% on the total consumption of the sugar refinery.
  • FIG. 2 which essentially comprises a washing tower 14 'and a decanter 40.
  • the lower part of the tower is divided by a cylindrical partition 42 into a central well 44 receiving the heated water falling of the lower baffle 32 'and an annular capacity 46.
  • a water supply of the capacity 46 is provided at F as well as an inlet G for milk of lime or candy scum.
  • a pump 48 takes the washing liquor from the tank 46 and feeds an injection device 50 placed on the pipe 52 for supplying the gases to the tower.
  • An overflow 54 placed in the capacity 46 makes it possible to supply the decanter 40.
  • An outlet for the clarified liquid is provided at H at the upper part of the decanter.
  • the sludge containing the sulphites and calcium sulphates is extracted from the decanter by a pump 56 and mixed with the water to be heated, the mixture thus formed feeding the distributor 30 'of the washing tower. This solution makes it possible to remove, with the washing liquor discharged from the decanter, most of the soluble materials contained in the gases.
  • the gases escaping from the carbonation apparatus (es) used for purifying the juices could be used in the washing tower.
  • wet carbonation gases at 85 ° C, you can, for example, heat water from 40 ° C to 80 ° C.
  • This hot water can be used as diffusion water, the carbon dioxide being very slightly soluble in water at 80 ° C., or as an intermediate fluid for heating the diffusion waters in an indirect exchange exchanger.
  • the latter solution must be adopted if the gases contain components which are soluble in diffusion water and which may disturb the following operations in the manufacture of sugar.

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  • Chemical & Material Sciences (AREA)
  • Biochemistry (AREA)
  • Organic Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Seasonings (AREA)
  • Jellies, Jams, And Syrups (AREA)
  • Agricultural Chemicals And Associated Chemicals (AREA)
  • Non-Alcoholic Beverages (AREA)
  • Heat Treatment Of Water, Waste Water Or Sewage (AREA)
  • Medicines Containing Plant Substances (AREA)
  • Paper (AREA)
  • Chemical And Physical Treatments For Wood And The Like (AREA)
  • Steam Or Hot-Water Central Heating Systems (AREA)
  • Fats And Perfumes (AREA)
  • Devices And Processes Conducted In The Presence Of Fluids And Solid Particles (AREA)
  • Extraction Or Liquid Replacement (AREA)
EP84401200A 1983-06-20 1984-06-13 Verfahren zur Diffusionswasserheizung für Zuckerrübenextraktion und Vorrichtung zur Durchführung dieses Verfahrens Expired EP0132420B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT84401200T ATE21934T1 (de) 1983-06-20 1984-06-13 Verfahren zur diffusionswasserheizung fuer zuckerruebenextraktion und vorrichtung zur durchfuehrung dieses verfahrens.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8310138 1983-06-20
FR8310138A FR2547595B1 (fr) 1983-06-20 1983-06-20 Procede de chauffage des eaux de diffusion en sucrerie de betteraves et installation pour la mise en oeuvre de ce procede

Publications (2)

Publication Number Publication Date
EP0132420A1 true EP0132420A1 (de) 1985-01-30
EP0132420B1 EP0132420B1 (de) 1986-09-03

Family

ID=9289937

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84401200A Expired EP0132420B1 (de) 1983-06-20 1984-06-13 Verfahren zur Diffusionswasserheizung für Zuckerrübenextraktion und Vorrichtung zur Durchführung dieses Verfahrens

Country Status (7)

Country Link
EP (1) EP0132420B1 (de)
AT (1) ATE21934T1 (de)
DE (1) DE3460611D1 (de)
DK (1) DK160437C (de)
ES (1) ES8503030A1 (de)
FR (1) FR2547595B1 (de)
MA (1) MA20152A1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE1004918A3 (fr) * 1990-11-27 1993-02-23 Sucrerie Naveau S A Procede de recuperation de calories et d'acidifiant lors d'une depollution de gaz ou de fumee.

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR404701A (fr) * 1908-10-26 1909-12-10 Bronislas Sopocko Procédé de conservation des cossettes en vue de la fabrication du sucre
FR556370A (fr) * 1921-12-30 1923-07-19 Barbet Et Fils Et Cie E Perfectionnements aux procédés d'extraction du jus de betteraves pour distillerie
FR2501832A1 (fr) * 1981-03-13 1982-09-17 Bonneville Simone Epurateur - echangeur thermique pour gaz de combustion

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4135309A (en) * 1977-07-11 1979-01-23 Buttes Gas & Oil Co. Process for drying beet pulp
DE2925283C2 (de) * 1979-06-22 1983-09-29 Süddeutsche Zucker AG, 6800 Mannheim Verfahren zur Wiederverwendung von Abgasen der Carbonatation einer Zuckerfabrik

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR404701A (fr) * 1908-10-26 1909-12-10 Bronislas Sopocko Procédé de conservation des cossettes en vue de la fabrication du sucre
FR556370A (fr) * 1921-12-30 1923-07-19 Barbet Et Fils Et Cie E Perfectionnements aux procédés d'extraction du jus de betteraves pour distillerie
FR2501832A1 (fr) * 1981-03-13 1982-09-17 Bonneville Simone Epurateur - echangeur thermique pour gaz de combustion

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE1004918A3 (fr) * 1990-11-27 1993-02-23 Sucrerie Naveau S A Procede de recuperation de calories et d'acidifiant lors d'une depollution de gaz ou de fumee.

Also Published As

Publication number Publication date
ES533546A0 (es) 1985-02-16
DK295284A (da) 1984-12-21
FR2547595A1 (fr) 1984-12-21
EP0132420B1 (de) 1986-09-03
DK160437C (da) 1991-08-19
DK160437B (da) 1991-03-11
MA20152A1 (fr) 1984-12-31
ATE21934T1 (de) 1986-09-15
FR2547595B1 (fr) 1985-10-04
DE3460611D1 (en) 1986-10-09
ES8503030A1 (es) 1985-02-16
DK295284D0 (da) 1984-06-15

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