CS264723B1 - Fraction-sedimentation devices for the separation of starch-protein suspension from maize - Google Patents

Abstract

The solution concerns a fractionation-sedimentation device with the possibility of use for separation of eucolloid suspensions, where high purity of the separated refined component is required. Its essence is that it consists of a vertical cylindrical non-metallic sedimentation vessel with a height-to-diameter ratio of 4:1 to 5:1, closed at the bottom with a non-metallic closure. The closure is equipped with an opening for a central outlet with a two-way flow regulator for separation of the middle gluten and upper water fractions and up to four openings for non-metallic siphons, connected via three-way flow regulators to non-metallic side arms, gradually separating starch through a common drain pipe into a separate, vacuum tank at -50 to 100 kPa. The inner diameter of the side arms is in the ratio of 1:6 to 1:8 to the diameter of the sedimentation vessel.

Description

264723 2

BACKGROUND OF THE INVENTION The invention relates to a fractionation-sedimentation device for separating a starch-protein suspension from maize.

Until now, various devices such as Dutch rafts, separators, hydrocyclones, flotators and others have been known for the separation of starch-protein suspension from maize.

The disadvantage of the exchanged types of equipment, which each works on a different principle, different, increased nationality on energy, water consumption, operation, need for stopping production area, operation, unsatisfactory hygienic health conditions and fluctuations in production and quality of corn starch.

The aforementioned drawbacks are eliminated by the fractional sedimentation apparatus according to the invention, which is essentially that it consists of a vertically oriented non-metallic, for example a cylindrical, cylindrical glassware with a height to diameter ratio of 5: 1 to 4: 1. Its base consists of a horizontal, non-metallic, flat closure with a central outlet opening with a two-way flow regulator and twenty four openings for non-metallic, for example glass siphons connected via a three-way regulator to a non-metallic vertical, for example glass side arms, gradual dividing doosobic starch, to -50 to -100 kPa vacuum tank through common drain line. In this case, the inner diameter of the lateral dates is 1: 6 to 1: 8 to the diameter of the sedimentation vessel. Advantages of the fractionation-sedimentation device according to the invention lie! in that 50 to 80% of the electricity is saved compared to known plants. Compared to the devices used, due to its vertical position, the need for underlay space is reduced. Another advantage is the automated process of starch separation from other ingredients, ease of operation, clean and healthy harmless, uniform operation, obtaining an extremely pure final starch product containing 0.2 to 0.4% residual gluten in dry matter with the possibility of better application in raw material for other products.

An example of an embodiment of an underlay device in a longitudinal section is shown schematically in the attached drawing. The device according to the invention, as shown in the drawing, consists of a vertically oriented non-metallic, for example a glass central sedimentation vessel 1 of a cylindrical shape with a height to diameter ratio of 5: 1 to 4: 1, which is closed at the bottom by a non-metallic flat closure. This is provided with three to five openings, one of which is for a central outlet 4 with a flow regulator and two to four are for glass siphons 2, connected via three-way flow controllers to non-metallic, preferably glass side arms 2. The ratio of the inner diameter of the arms 2 to the diameter of the sedimentation vessel 1 is 1: 6 to 1: 8. The lateral arms 2 are connected to a common non-metallic drain pipe 7, which opens into a separate tank, vacuumed to -50 to -100 kPa. The operation of the device according to the invention is as follows. The starch-protein suspension is suspended in a central sedimentation vessel, where the suspension is fractionated for 45 minutes. After the sedimentation time has elapsed, the lower starch fraction is gradually removed by the siphon 3 into the side glass arms 2 through the flow regulators 5, whereby the starch particles are sucked off by a common drain line T1 and a vacuum tank, respectively, after their adjustment. The medium gluten and upper aqueous fractions are, after setting the two-way flow regulator, continuously discharged from the central outlet to a separate tank with the possibility of recovery in previous stages of production.

In the fractionation / sedimentation apparatus according to the invention with an hourly capacity of 1 m < 3 > of a starch-protein suspension, a density of 1060 kg.ms with an average of 7% protein content yields a starch having a content of 0.2 to 0.4 after a 45 minute fractional sedimentation refining. % protein in dry matter.

Possibilities of using a vertical fractionation sedimentation plant appear in the eucoloid slurry separation industries where high purity of the refined component is required.

Claims (1)

OBJECT OF THE INVENTION Fractionation-sedimentation device for separating a starch-protein suspension from maize, characterized in that it consists of a vertical cylindrical non-metallic, for example a glass central sedimentation vessel (1) with a height to diameter ratio of 5: 1 to 4: 1, closed on the underside a flat cap having a central drain hole (4) with a two-way flow regulator (6) to divide the middle gluten and upper water fractions through the duct into a separate tank, and up to four holes for two to four non-metallic, for example glass siphons (3) ), connected via three-way flow regulators (5) to two to four vertically non-metallic, for example glass side arms (2), the inner diameter of which is 1: 6 to 1: 8 to the diameter of the sedimentation vessel (1), a common drain line (7) to a separate -50 to -100 kPa vacuum tank.