Production method of bulk ingredient-expanded sinking aquatic feed

Abstract

The invention relates to a production technology of sinking aquatic feed molded by carrying out extruding expansion and ring die pelletizing on a bulk ingredient. The production technology comprises the steps of carrying out efficient tempering and extruding expansion on mixed powder which is free from a heat-sensitive component and a feed additive, so as to cure the bulk ingredient, cooling, finely crushing and then adding the heat-sensitive component and the feed additive; after that, tempering, pelletizing and molding. The sinking aquatic feed processed by the method has the advantages of high curing degree, stable quality, easy quality control, and less loss of the heat-sensitive component compared with expanded sinking pellet feed; furthermore, a ring die pelletizing process is adopted in granule formation, so that an aquatic feed expander and a drying machine do not need to be arranged, and steam consumption is further greatly reduced; the formula is wide in adaptability, and high-starch formula sinking feed is easily produced.

Description

technical field [0001] The invention belongs to feed processing technology and relates to a production method of sinking aquatic feed. Background technique [0002] Extruded sinking aquatic feed has high stability in water, does not need to add artificial binders, does not collapse, does not disperse, and has a low bait coefficient. It has been widely used in fish farming and is gradually replacing hard pellet feed. Moreover, compared with the pelleted feed that is directly granulated without puffing, it has a longer water resistance time, a higher degree of maturity, is easy to absorb and soften, and is easy to digest and absorb. It can also improve the palatability and flavor of the product, and reduce feed waste and water pollution. [0003] However, the production of aquatic product extruded sinking pellet feed in the prior art generally needs to go through the following processes: the raw materials are ultrafinely pulverized, tempered, then extruded and extruded, and th...

AI Technical Summary

Problems solved by technology

[0004] 1. Need to go through drying process, high energy consumption

[0005] Because water and steam need to be added in the puffing process, the wet and soft granules coming out of the puffing machine are as high as 23% after flash evaporation, so they must also go through the drying process, and each ton of feed needs to consume more than 250kg of saturated steam heat energy , high energy consumption;

[0006] 2. Heat-sensitive components are easily inactivated

[0007] The heat-sensitive ingredients in the feed are extruded under high temperature and high pressure and dried at high temperature for a long time, and the loss is serious, and some heat-sensitive ingredients will be completely inactivated;

[0008] 3. Lots of waste and waste

[0009] In the existing technology, the aquatic feed extruder is used to produce extruded sinking feed, and the product quality is unstable, especially in the production of sinking feed with high starch formula. The particle density is not easy to control, it is easy to float, and 100% sinking cannot be guaranteed. It is necessary to configure a density control device. The operation is complicated, the cost is high, and there may be problems such as over-ripening and serious protein denaturation; the bulk density of the extruded sinking pellet feed is difficult to control, the product quality is unstable, and it is easy to float; the high-starch formula sinking feed is difficult to process and the operation is complicated, resulting in waste Many, high cost, big waste

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