BE1005295A3 - Separator flake. - Google Patents

Abstract

The invention relates to a scale separator, which is used for grain size classification and for separating scales from a mixture of sunflower seed scales. The invention is characterized by a combination of inclined screening cabinets and specially connected electro-separators.

Description

       

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  "Scale separator".



   A scale separator is used for classifying grain sizes and for separating scales from a mixture of sunflower seed scales.



   Numerous oilseed separators and separation plants are known in the art.



   DE-OS 21 66 149 discloses a separator for a device for the separation of scales of rapeseed. It uses an air-blowing screen and cylinders covered with synthetic materials, which are arranged in pairs next to brushing rollers, a vacuum separator being connected last.



   DE-OS 21 35 173 describes a separation of scales of rapeseed consisting of a cascade of rollers. These principles are not suitable for the separation of sunflower seeds, because in the latter case during the dehulling there appear very many debris from the nuclei and the scales cannot be completely separated.



   For this reason, other principles have been applied for the separation of sunflower seeds.



   DD 108 042 thus describes an installation for shelling and separation, which is based on the principle of separation by effect

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 corona. It starts from the fact that a classification of chipped seeds would not be necessary and that therefore a separation of dust could be eliminated.



   In practice, this variant of flaking and peeling has also been found to be unsuitable, the separation being insufficient, since the scale fraction in the core product was largely above 15%.



   The centrifuge scaler according to DE-OS 28 34 217 has fractions in scales of the same order.



   DE-OS 24 38 706 finally describes an expensive dehulling and separation process, which is characterized by hydrothermal treatment under pressure, subsequent drying in a high frequency field and by the use of antioxidants and synergetizers.



   Finally, a whole series of vibrating screens for the separation of scales from seed mixtures are known (for example DE-PS 1 431 430). Among other things, the separation works here satisfactorily only if there are exactly defined particle size proportions and above all differences in size between the scales and the cores. EP 081 072 discloses an oscillating gutter with fluidization installation for the separation of a mixture of crushed materials. The separation is carried out on the basis of differences in densities. To guarantee regular operation, however, a particle size classification should first be undertaken. This problem is solved in EP 0162 014, but a very expensive device with high energy consumption is however created there.



   According to the preamble to the claim, the object of the invention is to create an installation for separating the scales of scaled sunflower seeds, which is characterized by a reduced size

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 installation, reduced electrical energy consumption compared to known solutions and a separation efficiency allowing a scale content of less than 12% in the core product.



   The invention is explained below in more detail using the diagram of the scale separator shown in FIG. 1.



   Two screening cabinets 1, in closed design, inclined, independent and with free oscillation, are placed in a frame made of bolted steel profiles. The upper screening cabinet 1.1 and the lower screening cabinet 1. 2 are each equipped with a toothed belt drive connected to an eccentric hub. In the sieve drawer 2 are introduced sieves with a mesh of 3.0 x 22.0 mm. On the upper screening cabinet 1.1, immediately behind the feed orifice 3 and at the lower rear end, and on the lower screening cabinet 1. 2, at the rear end, product extractors are arranged. which open into feed funnels 4.

   The feed funnels 4 are part of a double electro-separator, the two parts of which are made with enantiomorphic shapes. Product extraction funnels 7 fitted with dividers 8 are arranged on the rollers 5 of the double electro-separator, below the electrode holders 6.



   As regards the operating mode, after shelling the sunflower seeds, the mixture of scales goes into the screening cabinets 1 via the feed orifice 3. Inside the screening cabinets 1, the mixture is divided into three parts.

   In the double electro-separator, the operating mode of which is exactly described in DD 108 042, the coarse fraction is separated into two fractions coming out from below, the coarse scales (GS) and the unscaled cores (UK). The average fraction is shared on the other side of the double electro-separator in small scales (KS), small

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 nuclei (KK) and an intermediate fraction (KZ). The fine fraction, which essentially consists only of sunflower meal, is mixed inside the machine with the fine core product (KK).


    

Claims (2)

Claim Scale separator, for the grading classification of grains and the separation of scales from sunflower seeds, characterized by two screening cabinets (1), oscillating freely and independently, inclined and arranged one above the other and fitted with interchangeable screening drawers (2), which have three extraction ports arranged at the front and rear ends of the upper screening cabinet (1.1) and at the rear end of the screening cabinet lower screening (1.2);  by a completely enclosed roller separator, operating on the principle of electro-separation, produced in the form of a double and opposite construction, and the extraction opening of the front end of the cabinet upper screen (1.1) and the rear end of the lower screen cabinet (1. 2) is connected to one of the two electro-separators, the extraction orifice of the rear end of the upper screening cabinet (1.1) being connected to the opposite electro-separator.