关键词: 核桃, 壳仁分选, 智能分选, 风选, 筛分

Abstract: Shell kernel sorting is an important part of walnut shelling and kernel extraction, which is the basis of walnut deep processing. This paper analyzes and summarizes the current status of research and application of equipment in the field of walnut shell kernel sorting for intelligent sorting technology, wind sorting technology, screening technology and flotation technology, respectively. Walnut intelligent sorting technology has the advantage of high recognition rate, which can be used for the selection of kernel after the initial sorting of shell kernel, but due to the high cost of the current intelligent sorting equipment, it is difficult to popularize the application in the production. Wind separation technology has the advantages of small kernel damage, easy to operate equipment, by changing the structure of the equipment, different sorting effects can be achieved, the most widely used in the field of walnut shell kernel sorting. In sieving technology, the sieve mesh damages the kernel to some extent and is mostly used for sorting the shell kernel of oiled walnuts. In flotation technology, drying treatment is required after shell kernel separation, which raises the production cost and is less applied at present. On the basis of analyzing the advantages and disadvantages of the four types of sorting technology, it is proposed to strengthen the research and development of intelligent sorting equipment and promote the development direction of technological integration between different sorting technologies, which provides theoretical references for the development of walnut shell kernel sorting equipment.

Key words: walnut, shell and kernel separation, intelligent separation, winnowing, screening