Extrusion gelatinization device and system

Abstract

The invention provides an extrusion gelatinization device and a system. The device comprises a heating cavity, an extrusion cavity and a screw rod. The heating cavity is provided with a steam inlet and a steam outlet. The extrusion cavity is located in the heating cavity, and provided with a feeding port and a discharging port which extend out of the heating cavity. The screw rod is of a hollow structure, can rotate in the circumferential direction and comprises a driving section and a working section. The working section is located in the extrusion cavity and used for fitting with the cavity wall of the extrusion cavity when rotating the screw rod so that materials can be extruded and gelatinized while being conveyed from the feeding port to the discharging port. The driving section extends out of the extrusion cavity, and is provided with an opening on the end for communicating with an external steam source and connecting with an external rotary driving mechanism. A through hole for overflowing steam into the extrusion cavity is arranged on the working section. Therefore, materials in the extrusion cavity can be heated at extremely high heating rate with extremely high heating uniformity under the action of the double-layer steam, thereby ensuring gelatinization of the materials under high productivity.

Description

technical field [0001] The invention relates, in particular to an extrusion gelatinization device and system. Background technique [0002] Extrusion technology is a technology that integrates multiple unit operations such as mixing, conveying, heating, cooking and pressurization, and has a wide range of applications in the field of food processing. For example, in some starch-based foods, starch-based materials are first conditioned with water to obtain wet materials containing a certain amount of moisture, and then enter the screw extrusion for centralized extrusion and gelatinization, or steam and gelatinize before entering the extruder. Then enter into the extruder for gelatinization. [0003] Most of the existing extrusion gelatinization devices use single screw or twin screw, and the processing process can generally be divided into three stages. The first stage is the material conveying stage. Forward conveying; the second stage is the gelatinization stage. With the ...

AI Technical Summary

Problems solved by technology

According to the above three stages, in order to achieve a better degree of gelatinization in the current extrusion gelatinization device, it is generally realized by increasing the length of the extrusion screw or the diameter of the extrusion gelatinization chamber, but this means that higher energy is required. consumption

At the same time, the heating source of this type of extrusion gelatinization device is mainly shear friction and external function gelatinization, and the heating is too simple. In some starch-based extruded products, when the output increases, the degree of gelatinization of the product will be insufficient. Ultimately affect product quality

For example, in the extrusion processing of rice noodles, the current maximum production capacity is only 200kg / h. If the production capacity is increased, the gelatinization degree of the product will decrease sharply, resulting in a sharp decline in product quality.

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