FR2668394A1 - PLANT FOR DECORTICATING OIL SEEDS AND OPERATING PROCESS. - Google Patents

Abstract

Oilseed decortication plant, characterized in that a set of two-stage sieve (2a) and a double electric separator (2b), as well as a single electric separator (3) are associated with each of the shelling machines ( 1) a primary decortication device and a secondary decortication device and that plansichters (4) are associated with the two decortication stages and that all separation facilities are connected to a central suction system (5) . The operating process is characterized by the fractional extraction of core fractions, shell fractions and mixed fractions, in the different separation stages.

Description

1 -

  The invention relates to a peeling installation.

  tion of oil seeds and a method of exploitation

  an oil seed husking facility

  ses, in particular sunflower seeds The process finds its application in oil mills.

  By the documents DD 108 042 and DD 217 999, it is known

  there are processes for preparing oil seeds and electrostatic separation of seed husks

  oilseeds In these processes, a drawback is provocative

  qué by the phenomenon of rupture of the nucleus, in particular of

  fines, which is linked to the separation effect.

  Another seed decortication technology

  known vegetable is the elimination of envelopes by rubbing

  By means of graters, brushes or cylinders The envelopes thus rubbed are separated from the cores in a wind sorter In this case, the disadvantages are, of a

  obviously, the poor degree of peeling, the eli-

  defective mination of seed husks in the

  wind sorter and high electrical energy consumption

  only by the necessary ventilation systems.

  With the solution according to document EP 066 897, there is known a process of dehulling in which the marginal zones of the seed are swollen with steam and after 2 - that, the seeds are dried quickly The envelopes, which have started to tear under the effect of swelling,

  burst during the shrinkage phenomenon caused by the se-

  chage and are removed by elutriation in an operative phase

  additional rack. According to document DE-AS-23 54; 617, seeds of

  soybeans are stripped of their husk by ultra-heating

  tra-fast in a fluidized bed and by decortication by subsequent impact Huge energy costs are

  also necessary with these two solutions.

  The object of the invention is to provide an installation

  oilseed husking and a method

  actuation of a grit decortication installation

  nes oléagineuses which eliminates, to a very large extent, the disadvantages of known solutions and, in particular,

  cause or have a relative energy consumption

  At the same time, we take into consideration

  tion of technical aspects of environmental protection-

  as far as air pollution is concerned, by preventing emission-laden suction air from being expelled

outwards.

  The oil seed husking facility

  neuses according to the invention is characterized in that a set of two-stage sieves and a double electric separator, as well as a simple electric separator are associated with each of the dehulling machines of a primary dehulling device and of a secondary dehulling device and that planichters are associated with the two dehulling stages and that all the

  separators are connected to a central vacuum system

  tral. The method of actuating an oilseed husking installation according to the invention is characterized in that the primary husking allows

  to obtain a fraction of unhulled seeds, a frac-

3 -

  tion cores, a fraction large envelopes and a frac-

  tion small envelopes, as well as a mixed fraction, that

  unshelled seeds are taken to a disposal

  tif of secondary dehulling, in which a fraction obtained from small nuclei and a fraction from large cores, a mixed fraction from small products and a mixed fraction from large

  products, and a fraction small envelopes and a frac-

  large envelopes, and that the intermediate fractions

  res are again subjected to fractionation

  envelopes and cores, and that all of the fractions

  loppes thus obtained is brought into a wind sorter.

  The invention is explained below in more detail, with reference to an exemplary embodiment under

the form of a mass balance.

  In the accompanying drawings, FIG. 1 is a simplified diagram of an installation according to the invention and FIG.

  2 is a functional flow diagram of the fractions.

  The decortication installation is made up of two

  stages assembled in series, each comprising several machi

  decortication nes 1, matching sets of two-stage screens 2 a, double electric separators 2 b and single electric separators 3, two planichters 4

  and a central vacuum system 5.

  For the treatment of 275 t / l of sunflower seeds

  soil with a proportion of 27% envelopes and

  45% oil proportion, the corresponding fractions are obtained

  according to the process illustrated by the flowchart of the figure

re 2.

  For the description of the structure and the function-

  installation, we also refer to the request for

  patent filed the same day under the title of "Process and agent-

  cement for the preparation of sunflower seeds by peeling

  cation for subsequent oil extraction "-4-

Claims (2)

RESELL ICATIONS   1 Oil seed hulling plant, characterized in that each has a set of two-stage sieves (2 a) and a double electric separator (2 b), as well as a single electric separator (3)   decortication machines (1) of a decorating device   primary tication and a dehulling device   condaire and that planichters (4) are associated with the two stages of dehulling and that all the   separators are connected to a central vacuum system tral (5).   2 operating method of an installation according to claim for dehulling, in particular of   sunflower seeds, in which all seeds net-   are separated from the cores by crushing the envelopes   pes, characterized in that the primary decortication produces a fraction of unhulled seeds, a small fraction   kernels and a fraction large kernels, a fraction small in-   large envelopes and a fraction, as well as a   mixed fraction, that the unhulled seeds are em-   born towards a secondary dehulling device, in the-   which one obtains a fraction small kernels and a fraction   large cores, a mixed fraction large products and a frac-   mixed products, and a fraction of large envelop-   pes and a fraction small envelopes, and that the intermediate fractions are again subjected to separation into   envelope and core fractions, and that all of the fractions   The envelopes thus obtained are brought into a wind sorter.