A method of producing high-quality filter material by using discarded walnut shells

Abstract

The present invention relates to a method for producing a high-quality filtration material by using waste walnut shells. The method comprises: sequentially carrying out high-temperature and high-pressure ultrasonic degreasing, drying, crushing, air separation, atmospheric pressure air breaking, color selection and other process steps on waste walnut shells. According to the present invention, the method has characteristics of reasonable process route, high automation degree, and low production cost; the reconfigurable modular technology is adopted as the core, the high-temperature and high-pressure ultrasonic degreasing, the drying, the crushing, the atmospheric pressure air breaking, the color selection and other key technologies are integrated to improve the inherent quality of the walnut shell filtration material, the technical steps such as air separation and color selection are performed to achieve the refining of the walnut shell filtration material and improve the sensory quality, and the research and development and the promotion of the technology provide positive significance for the fields of improvement of the walnut product added value, extending of the rural economy forestry and fruit industry planting chain, promotion of the walnut fruit industry deep processing industry development, and the like.

Description

technical field [0001] The content of the invention belongs to the technical field of comprehensive utilization of agricultural and forestry waste, and relates to a method for producing high-quality filter material from agricultural and forestry waste—walnut shells. Background technique [0002] With the development of walnut planting and its deep processing industry, a large amount of walnut shells will be produced every year. Modern scientific research shows that walnut shells are rich in many useful ingredients. According to analysis, every 100g of walnut shell contains 0.66g of ash, 5.95g of moisture, 3.71g of benzyl alcohol extract, 38.05g of lignin, 30.88g of cellulose, and 27.26g of hemicellulose. In the past, after walnuts were sold as dried fruits, a large amount of walnut shells were discarded because it was difficult to recycle them. [0003] Walnut shells are widely used, and can be processed into walnut shell particles of different particle sizes and used in p...

AI Technical Summary

Problems solved by technology

[0005] The traditional walnut shell filter material production process uses steps such as crushing, screening, high-temperature degreasing, washing, drying, rounding, and grading. The degree of automation is low, and the production process is simple. The porosity, oil removal rate, and The physical indicators such as wear rate, floating skin rate, and specific gravity are not high, resulting in poor quality of filter material production, high cost, poor sensory quality and application effect, etc., affecting the backwashing intensity and filtration rate of walnut shell filter material So far, there is no precedent in this field for the production of high-quality filter media from walnut shells, and thus the precious resource of walnut shells has not been further effectively developed.