Sand removal method and sand removal device of excrement

Abstract

The invention relates to a sand removal method and a sand removal device of excrement. The sand removal method mainly comprises the steps of performing impact grinding on the excrement and a sand cake with water and gas, allowing the excrement with smaller density to be located at the upper part of a mixed liquid, forming a gas flotation phenomenon by the combined action of the water and the gas, allowing bubbles to exert a support effect on ground cattle manure, and allowing sand to deposit at the bottom to be discharged by a conveying screw shaft. The sand removal device comprises a body placed obliquely; a reducer motor and a bearing are arranged on the outer sides of the high end and the low end of the body respectively; the conveying screw shaft is arranged in a groove of the body; the low end of the conveying screw shaft is mounted on the bearing; the high end of the conveying screw shaft is driven by the reducer motor to rotate; a raw material inlet is formed at the upper part of the low end of the body; a manure water overflow port is formed above the side part of the low end of the body; air nozzles and hydrojet nozzles are sequentially arranged at the bottom of the low end of the body; and a sand discharge port is formed at the bottom of the high end of the body. The method and the device effectively solve the sand removal problem of the excrement in the modern breeding industry, and the device is simple in structure, low in cost and easy to maintain.

Description

technical field [0001] The invention relates to a manure desanding method and a desanding device, which are suitable for the treatment of manure in the aquaculture industry where sand is used as a bed for livestock and poultry, and are especially suitable for the desanding treatment of cow dung where sand is used as a bed for cattle. Background technique [0002] At present, because of the characteristics of the sand itself, the breeding enterprises in some areas of the country have no conditions for the growth of bacteria. More than 50% of the cattle breeding enterprises use sand as the cattle bed, and the manure of cattle will inevitably contain a lot of sand. At present, the most environmentally friendly and energy-saving way to deal with cow dung in the breeding industry is to ferment it into biogas for power generation or heating, and return the slag to the field as fertilizer. Sand-containing manure will cause serious wear and tear of equipment and blockage of pipeline...

AI Technical Summary

Problems solved by technology

[0003] The invention provides a method and device for removing sand from manure, which uses the principle of air flotation to separate sand from manure, and solves the problem of sand removal in the fermentation process of manure

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