Screening device for flour processing

Abstract

The invention discloses a screening device for flour processing. The screening device comprises a material distributing and filtering bin and a coarse material filtering bin which are separated by a partition plate, a fine material filtering bin and a feeding box are arranged at the two ends of the material distributing and filtering bin correspondingly, the material distributing and filtering bin is divided into a first bin and a second bin through a first filtering sieve, and the first bin and the second bin are vertically arranged. The first bin and the fine material filtering bin are separated through a second filtering sieve, a turnover telescopic rod with a turnover scraper at the front end is arranged at the junction of the first filtering sieve and the second filtering sieve, a material passing opening formed in the partition plate corresponds to the turnover scraper, and propeller blades driven by a power mechanism to rotate are arranged in the coarse material filtering bin. The power mechanism can synchronously drive a turnover telescopic rod to alternately and horizontally move and turn over along the surface of the first filter sieve, the coarse material filtering bin and the fine material filtering bin are in airflow communication, a third filtering sieve is arranged in the coarse material filtering bin, the lower portion of the third filtering sieve communicates with the second bin, and a material returning mechanism connected with a feeding box is arranged in the second bin. The wheat screening efficiency can be improved.

Description

technical field [0001] The invention relates to the technical field of screening devices, in particular to a screening device for flour processing. Background technique [0002] Flour is a powder made from wheat. According to the protein content in flour, it can be divided into high-gluten flour, medium-gluten flour, low-gluten flour and gluten-free flour. Flour is the staple food in most areas of northern China, and there are various kinds of food made from flour, with various patterns and flavors. Processing wheat into flour generally goes through the following processes: screening, peeling, milling, packing, etc. There are many impurities in wheat, which are generally divided into large-scale impurities, small-scale impurities, and side-by-side impurities. Among them, larger stones with larger grains than wheat grains are coarse impurities, and impurities with grains larger than wheat grains are fine impurities. If the stones are not screened out during the first scree...

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Problems solved by technology

[0003] In the prior art, magnetic separation or vibrating sieves are generally used to remove large-grained coarse material impurities. Some of the stones are not magnetic, so they cannot be screened by magnetic separation, and the vibrating sieve is too inefficient. If the coarse material A large amount of impurities accumulate, and when they cannot pass through the vibrating screen, it will reduce the screening efficiency and even block the vibrating screen

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