Processing device suitable for extrusion of foods and feeds

Abstract

The invention discloses a processing device suitable for extrusion of foods and feeds in food and feed processing field. The processing device comprises a conditioner and an extrusion cavity, wherein an extrusion screw is arranged inside the extrusion cavity, one end of the extrusion cavity is provided with a feeding hole, the other end of the extrusion cavity is provided with a discharging and cutting device, and pressure building device and an ager are arranged between the conditioner and the extrusion cavity in sequence; the pressure building device comprises a pressure building screw and a pressure building cavity, the pressure building screw is in driving connection with a driving device, and the inlet end of the pressure building cavity is connected with the outlet end of the conditioner; the ager comprises a pressure maintaining aging cavity and a heat-insulation shell arranged at the periphery, a steam inlet and a steam outlet are arranged on the heat-insulation shell, the outlet end of the pressure building cavity is connected with the inlet end of the pressure maintaining aging cavity, and the outlet end of the pressure maintaining aging cavity is connected with the feeding hole. In the device, most of energy resources for aging materials are from the energy of steam led to the heat-insulation shell, thereby the input of mechanical energy resources is effectively lowered, and the energy consumption for the extrusion of foods and feeds.

Description

technical field [0001] The invention mainly relates to molding equipment in the field of grain, food and feed processing, in particular to an extrusion and puffing processing device. Background technique [0002] Existing processing devices for extrusion and puffing of food and feed mainly include a conditioner and an extrusion chamber connected to the conditioner. The extrusion chamber is provided with an extrusion screw, and one end of the extrusion chamber is provided with a feeder. The other end is equipped with a discharge and cutting device. When working, the material first enters the conditioner for conditioning, and then enters the extrusion chamber. The screw in the extrusion chamber continuously pushes the material from the feed port to the discharge and cutting device, and the material is puffed and cut into shape. During this process, the material has successively gone through several stages such as tempering, feeding, kneading, and final aging. The pressure and...

AI Technical Summary

Problems solved by technology

However, in the early conditioning process of the material, due to the limitation of the outlet channel and time of the conditioning, the gelatinization degree of the material can only reach 40-50%, and then the material is extruded and stirred through the extrusion chamber, and the material is gelatinized The speed can reach 100%, but it needs to consume a lot of mechanical energy input from the extrusion screw. The input of these mechanical energy affects the pressure and temperature of the material, that is, affects the degree of maturity of the material. When the degree of maturity of the material is insufficient, the puffing of the material The quality will be affected, therefore, in order to guarantee the good quality of the product, the material itself should have enough energy

In the existing technology, in order to reduce the energy consumption of mechanical energy, some manufacturers will add some steam to the material at the feeding end of the extrusion chamber, because the addition of steam can improve the degree of gelatinization of the material and reduce the mechanical energy required in the process of material gelatinization , but its limited

Because the space of the extrusion cavity is very small, the residence time of the material in the entire extrusion cavity is very short, and the time for the steam to permeate the material is very short, so the degree of maturation of the material due to the effect of steam becomes relatively limited.

In addition, since the material that has just entered the extrusion chamber is in the form of solid particles, it wears heavily on the extrusion screw and the inner wall of the extrusion chamber, which shortens the service life of the extrusion screw and the extrusion chamber.

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