Crushing mechanism suitable for repairing heavy metal contaminated soil

Abstract

The invention discloses a crushing mechanism suitable for repairing heavy metal contaminated soil. The crushing mechanism suitable for repairing the heavy metal contaminated soil comprises a conveyorbelt, a pretreatment chamber and a crushing chamber; the conveyor belt stretches from exterior into the pretreatment chamber, a fan heater is arranged in the pretreatment chamber, a plurality of warmair nozzles extend out from the fan heater, and the warm air nozzles are aligned with the conveyor belt; an inlet of the crushing chamber extends into the pretreatment chamber, and the tail end of theconveyor belt is arranged above the inlet and used for feeding; two soil crushing gears and a rotating disk are arranged in the crushing chamber, wherein the two soil crushing gears can rotate relative to each other, a gap is formed between the peripheral surfaces of the two soil crushing gears, the inlet is formed right above the gap, and the rotating disk is arranged directly below the gap; anda plurality of soil crushing rods are arranged on the rotating disk, and the axes of the soil crushing rods, the rotating disk and the soil crushing gears are parallel to each other. The crushing mechanism suitable for repairing the heavy metal contaminated soil has the advantage of a good crushing effect.

Description

technical field [0001] The invention relates to soil remediation, in particular to a crushing mechanism 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 sources of pollution. Due to human activities, the content of trace metal elements in the soil exceeds the background value, and the 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 certain toxic elements such a...

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Problems solved by technology

[0004] The current mainstream soil remediation method is chemical treatment. A remediation method is disclosed in the application number CN201810086251.4, which is called a leaching treatment method for heavy metal contaminated soil. The soil is leached to achieve soil remediation. In actual use, it is found that if the soil compacts into blocks before leaching, the leaching effect will be reduced. Therefore, it is necessary to add a crushing process to pre-treat the compacted soil. However, the soil crushers on the market are still compacted when they contain different moisture The soil block fragmentation effect is unstable, which will eventually affect the repair effect

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