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US 4,050,953 AGranted
Process for continuously producing sugar
AssigneeHitachi, Ltd.
InventorsNorio Nakazato, Kosai Hiratsuka, Tokinobu Furukawa
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AssigneeHitachi, Ltd.
InventorsNorio Nakazato, Kosai Hiratsuka, Tokinobu Furukawa
Estimating the term…
In a continuous sugar evaporator-crystallizer having a plurality of evaporating-crystallizing vessels as stages, each evaporating-crystallizing stages being communicated one to another in series and being provided with a means for feeding an aqueous sugar solution, a heating means and a means for withdrawing generated steam, by feeding an aqueous sugar solution to each evaporating-crystallizing stage, heating the aqueous sugar solution in each evaporating-crystallizing stage, thereby evaporating water off the aqueous sugar solution and crystallizing sugar crystals, and withdrawing the generated steam from each of the stages, while feeding seed sugar crystals to the first evaporating-crystallizing stage and withdrawing the resulting sugar crystal slurry from the last evaporating-crystallizing stage, sugar crystals of high quality is obtained in the slurry with an effective suppression of occurrence of conglomerated sugar grains by providing sugar crystal distances of 0.26 to 0.59 mm in the solution in the first evaporating-crystallizing stage, and feeding the aqueous sugar solution to each of intermediate evaporating-crystallizing stages excluding the first and last evaporating-crystallizing stages at a substantially equal feed rate, and making the feed rate of the aqueous sugar solution to the first evaporating-crystallizing stage at least 1.5 times the feed rate to each of the intermediate evaporating-crystallizing stages.
In a process for continuously producing sugar from an aqueous sugar solution in a continuous sugar evaporator-crystallizer having a plurality of evaporating-crystallizing vessels, each evaporating-crystallizing vessel being a stage, each stage communicated one to another in series and provided with a means for feeding an aqueous sugar solution, a heating means and a means for withdrawing generated steam, by feeding the aqueous sugar solution to each evaporating-crystallizing stage, heating the aqueous sugar solution in each evaporating-crystallizing stage, thereby evaporating water from the solution and crystallizing sugar crystals, and withdrawing the generated steam from each of the stages, while feeding sugar crystals to the first evaporating-crystallizing stage and withdrawing the resulting sugar crystal slurry from the last evaporating-crystallizing stage, the improvement which comprises providing a sugar crystal distance of 0.26 to 0.59 mm in the solution in the first evaporating-crystallizing stage.
In a process for continuously producing sugar from an aqueous sugar solution in a continuous evaporator-crystallizer having a plurality of evaporating-crystallizing vessels, each evaporating-crystalling vessel being a stage, each stage communicated one to another in series and provided with a means for feeding an aqueous sugar solution, a heating means and a means for withdrawing generated steam, by feeding the aqueous sugar solution to each evaporating-crystallizing stage, heating the aqueous sugar solution in each evaporating-crystallizing stage, thereby evaporating water from the solution and crystallizing sugar crystals, and withdrawing the generated steam from each of the stages, while feeding seed sugar crystals to the first evaporating-crystallizing stage and withdrawing the resulting sugar crystal slurry from the last evaporating-crystallizing stage, the improvement which comprises providing a sugar crystal distance 0.26 to 0.59 mm in the solution in the first evaporating-crystallizing stage, feeding the aqueous sugar solution to each of intermediate evaporating-crystallizing stages excluding the first and last evaporating-crystallizing stages at a substantially equal feed rate, and feeding the aqueous sugar solution to the first evaporating-crystallizing stage at a rate at least 1.5 times the feed rate to each of the intermediate evaporating-crystallizing stages.
Dependencies are inferred from the claim text.