Device for restoration of persistent organic pollutant-polluted soil and use method thereof

Abstract

The invention relates to the technical field of mechanical-chemical process-based harmless treatment on persistent organic pollutants and provides a device for restoration of persistent organic pollutant-polluted soil and a use method thereof. The device comprises a motor, a belt transmission device, a transmission gear set, a horizontal ball milling roller and a roller support. The use method comprises the following steps of adding polluted soil, an additive and grinding balls into the horizontal ball milling roller together, and after the polluted soil in the horizontal ball milling roller is subjected to pollutant-polluted soil restoration, and pouring the polluted soil, the additive and the grinding balls from the horizontal ball milling roller. At a rotation rate less than a critical rotation rate, the device greatly saves energy consumption, can be simply and reliably operated and can continuously work in dozens of hours. The device has a simple system, less initial investment, simple processes, less wearing and a low maintenance cost and is especially suitable for restoration of soil in the developing countries and the remote areas.

Description

technical field [0001] The invention relates to the technical field of mechanochemical harmless disposal of persistent organic pollutants, in particular to a device for repairing persistent organic pollutant-contaminated soil and a method for using the same. Background technique [0002] In the past three decades, my country's solid waste dismantling industry has developed rapidly, and as many as 70% of the world's electronic waste has been transported to China for dismantling. The solid waste dismantling industry is actually an industry of electronic solid waste recycling. Through the dismantling of electronic solid waste, usable old products can be obtained and precious metals can be recovered. However, because the components of electronic products are complex and contain many toxic substances, improper handling and disposal can easily cause environmental pollution. my country's solid waste dismantling enterprises generally have shortcomings such as simple production equi...

AI Technical Summary

Problems solved by technology

Although the degradation efficiency of POPs in the soil can reach more than 95% after more than ten hours of ball milling degradation, but in order to achieve large-scale restoration of soil, there are many restrictive factors in the planetary method

The capacity of the planetary ball mill currently used in the research of mechanochemical method to dispose of POPs is less than 100ml, while the maximum capacity of the production type planetary ball mill reaches 100L, that is, the single processing capacity of the planetary ball mill is small; the effective energy in the planetary effect is the mill Ball energy, the energy used to maintain the revolution of the grinding tank must be added but not effectively utilized. The ball mill has high working intensity, high energy consumption, low energy utilization rate, and short service life; in order to prevent the instrument from overheating during long-term high-speed operation Fatigue, the ball mill can only work intermittently, which not only increases the complexity of the operation, but also greatly increases the degradation time

If the size of the ball mill tank of the planetary ball mill is enlarged in order to achieve large-scale treatment of soil remediation, the weight of the equipment will increase proportionally to the third power, and the energy consumption for maintaining the revolution and rotation of the mill tank and balls will increase greatly ; The large increase in the energy used to maintain the cylinder's revolution will cause greater energy waste

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