A kind of equipment and method for recovering cadmium in soil by utilizing mulberry trees

Abstract

The invention discloses equipment for recycling cadmium in soil through a mulberry. The equipment comprises a rod peel stripping device and a separating and screening device at the lower end of the rod peel stripping device. The rod peel stripping device is internally provided with rotary rollers, and the rollers comprise a forward-adverse roller, feeding rollers, stripping rollers and discharging rollers; the outer walls of the rollers are provided with stretchable tender peel knife sets and coarse peel knife sets; each tender peel knife set comprises an interlayer blade and an inner layer blade; tool points of the interlayer blades are uniformly provided with large arc grooves; the inner layer blades are uniformly provided with small arc grooves; tool points of the coarse peel blades are in saw shapes; a shell of the separating and screening device is internally provided with an inner cavity sleeve; the upper end of the inner cavity sleeve is provided with a screening plate; the inner cavity sleeve is internally provided with a telescopic shaft; the telescopic shaft is connected with the screening plate; and the telescopic shaft is provided with a vibrator. A cadmium recycling method includes the following machining steps of land treatment, root pruning of a mulberry seedling, transplanting of the mulberry seedling, mulberry leaf cutting, processing treatment and cadmium recycling. By means of the equipment and the method, the utilization rate of the mulberry land can be raised, the soil repair effect is improved, and the cadmium treatment effect is improved.

Description

Technical field [0001] The invention relates to the technical field of remediation and treatment of cadmium-contaminated soil, in particular to a device for recovering cadmium in the soil by using mulberry trees and a method for recovering cadmium. Background technique [0002] Mulberry is a highly adsorbed plant of heavy metal cadmium, and an important choice for farmland reformation of heavy metal cadmium pollution. The cadmium in mulberry plant tissues is mainly deposited in the roots and stems; while mulberry leaves and bark are less; the existing technology generally only harvests the mulberry leaves, and then industrially reuses the barked mulberry roots and stems to recover cadmium. The high plant protein contained in the mulberry bark on the roots of the mulberry tree is wasted in vain. At the same time, the various organic substances contained in the mulberry bark hinder the industrial extraction of cadmium and increase the difficulty of cadmium extraction. Summary of t...

AI Technical Summary

Problems solved by technology

The cadmium in the mulberry plant tissue is mainly deposited in the roots and stems; while the mulberry leaves and bark are less; in the existing technology, only after the mulberry leaves are harvested, the mulberry roots with bark are industrially reused to recover cadmium. The high vegetable protein contained in the mulberry bark on the mulberry root is wasted in vain. At the same time, various organic substances contained in the mulberry bark hinder the industrial extraction of cadmium, which increases the difficulty of cadmium extraction.

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