Crushing and screening integrated machine suitable for heavy metal contaminated soil remediation

Abstract

The invention discloses a crushing and screening integrated machine suitable for heavy metal contaminated soil remediation. The crushing and screening integrated machine suitable for the heavy metal contaminated soil remediation comprises a crushing machine, a screening machine and a connecting pipe; the crushing machine comprises a conveyor belt, a pretreatment chamber and a crushing chamber, theconveyor belt stretches into the pretreatment chamber, a warm air blower is arranged in pretreatment chamber, a warm air nozzle extends out of the warm air blower, two soil crushing gears and a rotating disk are arranged in the crushing chamber, an interval is arranged between the two soil crushing gears, an inlet is formed right above the interval, the rotating disk is arranged right below the interval, and a plurality of soil crushing rods are arranged on the rotating disk; the crushing chamber communicates with the screening machine through the connecting pipe; a material guiding pipe is arranged in the screening machine, and a plurality of screening grooves are formed in the screening machine; and the screening grooves comprise push plates, screening base disks, power devices and endfaces, the power devices are used for pushing the push plates to move along the screening base disks, and the screening base disks comprise upper-layer screening nets and lower-layer material receiving plates. The crushing and screening integrated machine suitable for the heavy metal contaminated soil remediation has the advantages of high efficiency.

Description

technical field [0001] The invention relates to soil remediation, in particular to an integrated crushing and screening machine suitable for remediation of heavy metal polluted soil. Background technique [0002] In the prior art, soil is the material basis for sustainable economic and social development, and protecting the soil environment is an important part of promoting the construction of ecological civilization. [0003] Among the heavily polluted pollutants, heavy metals are the main source of pollution. Due to human activities, the content of trace metal elements in the soil exceeds the background value, and excessive deposition causes the content of heavy metals in the soil to be too high, resulting in heavy metal pollution in the soil. Heavy metals refer to metals with a specific gravity equal to or greater than 5.0, mainly including elements with significant biological toxicity such as cadmium, mercury, lead, chromium, and metalloid arsenic, as well as elements w...

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Problems solved by technology

[0004] The current mainstream soil remediation method is chemical treatment. In the application number CN201810086251.4, a method of leaching treatment for heavy metal-contaminated soil is disclosed. A remediation method is achieved by leaching the soil. In actual use, it is found that if the soil is compacted before leaching, the leaching effect will be reduced. In addition, the moisture contained in the soil itself will also cause deviations in the first leaching effect and affect the subsequent soil restoration effect.

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