China’s agricultural resources are declining, and the demand for livestock products is increasing. The solution to this contradiction is to implement factory culture, that is, to use industrial technology, modern science and technology, and equipment for the growth of livestock and poultry. The development provides a variety of suitable conditions so that the productive potential of livestock and poultry can be fully realized, so as to achieve the goal of efficient production of livestock products. The industrialized aquaculture industry in China has achieved great development in recent years. As an example of pig rearing, there are nearly 3,000 modern-scale pig farms across the country. The scale of farmer specialized farmer households is also expanding day by day, although the conditions are not comparable to those of large-scale farms. It should also be regarded as the prototype of factory culture. In order to reduce costs, pig farms are generally equipped with feed processing rooms to produce their own feed. From the perspective of reducing investment, most pig farms and specialized breeding households use vertical feed processing units, the 9PS series. This unit uses crushers and mixers to integrate and consume less power. The processing technology used is generally outsourced premix. After the rest of the raw materials are crushed by the pulverizer, the air is sent to the mixing bag, and the premixed material is spirally conveyed to the mixing bag through the auxiliary material box and stirred together with other raw materials to form a compound feed. This type of feed processing plant has two potential deficiencies: 1. Insufficient mixing uniformity. Premixed feeds require a high degree of homogeneity because most of the active ingredients are trace elements—micronutrients and vitamins—and some of the ingredients account for only one in 100,000 parts of the feed. Therefore, it is required that the coefficient of variation of the homogeneity of the pre-mixed feed should be ≤ 7% in order to avoid too much or too little ingestion of necessary trace components in livestock and poultry. The vertical mixer's variation coefficient of mixing uniformity CV ≤10%. When the mixed premix feed is processed by a vertical mixer, the uniformity is reduced, and the trace components of the processed feed are distributed unevenly. Less than the need for livestock growth. 2. The residue is too large, causing unevenness between each batch of feed. The working principle of the vertical mixer is that the vertical screw rotates at a high speed and the material is lifted from the bottom to the top. After the bulk material, the mixture is gradually mixed in a diffusion manner. The premixed feed is conveyed into the mix bottom by screwing in the auxiliary material box. On the one hand, the high-speed rotation of the screw makes the components with larger specific gravity such as minerals, etc., because the centrifugal force is large and thrown away from the axis can not participate in the mixing; On the other hand, the backlash of the spiral is larger, generally 4-5mm, and the backlash of the vertical spiral is 10mm, so each batch of feed will not be completely removed and there will be a large residue. Due to inaccurate operating procedures (such as pre-mixing rate, overall mixing time, etc.), the amount of residue in each batch of feed is not the same, and thus directly affects the content of each component in the next batch of materials, resulting in each batch of materials The unevenness. If pigs are found in farms lacking the trace elements or vitamin symptoms such as arches, tail bites, etc., in addition to checking the rationality of the feed formulation and the quality of various raw materials, whether the choice of feed mixer is reasonable is a matter of particular concern. . I suggest that the equipment should be updated as soon as possible - use a horizontal mixer instead of a vertical mixer.
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