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A Restoration Process Applicable to Contaminated Clay

A technology of clay and technology, applied in the field of restoration technology, can solve the problems of low processing efficiency, poor processing effect, difficult screening, etc., and achieve the effect of enhancing the processing effect, improving the processing effect, and improving the screening efficiency

Active Publication Date: 2016-08-31
QINGDAO NEW WORLD ENVIRONMENT PROTECTION CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this technological process is not suitable for polluted cohesive soil. Clay has strong cohesiveness and cohesiveness. When sieving with a crushing bucket, it will stick to the equipment wall and be difficult to sieve. The treatment efficiency is low and the treatment less effective

Method used

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  • A Restoration Process Applicable to Contaminated Clay

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Embodiment Construction

[0018] like figure 1 Shown, the present invention is applicable to the restoration process of polluted clay, and it comprises the following steps:

[0019] 1) Measurement of the soil to be treated: Load the contaminated clay to be treated into a dump truck, weigh it with a floor scale, transport it to the treatment site after weighing, and dispose of it in separate piles. Each pile of contaminated clay to be treated weighs 50 tons;

[0020] 2) adding water: adding enough water to the polluted clay measured in step 1) to ensure that the soil moisture content is at 20% to 30%;

[0021] 3) Adjusting pH: adding acid or alkali to the contaminated clay treated in step 2) for adjustment, adjusting to the acid-base condition required for the reaction between the stabilizing agent and the pollutant, and testing with pH test paper;

[0022] 4) Dosing (stabilization): adding a stabilizing agent to the contaminated clay treated in step 3), the dosage is 3%-5%;

[0023] 5) Stirring: Stir...

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Abstract

The invention relates to a repairing process applicable to polluted clay. The repairing process comprises the following steps: metering soil to be treated; adding water; adjusting a pH (Potential of Hydrogen) value, adding a (stabilized) medicine, agitating, sieving, standing and reacting, curing and safely backfilling. According to the repairing process provided by the invention, the sieving efficiency can be improved and the treating effect is improved; the sieving procedure is adjusted to be carried out after the agitating procedure. The clay has stronger caking property and adhesive property when the water content is less; when the water content is less, the distance between soil particles is closer, the molecular attraction is greater and the adhesive property is stronger. In an existing process, the time for sieving the clay is relatively long and the sieving efficiency is relatively low. After the sieving procedure is adjusted, the water is added in the processing process, along with increasing of water content, a formed water film enables the distance between the soil particles to be widened, therefore, the molecular attraction is reduced, and the caking property and the adhesive property are reduced, and furthermore, the soil particles are easy to sieve and the sieving efficiency is improved. The repairing process has the effect of uniformly mixing medicine-added soil again in a sieving process so that the treatment effect is enhanced.

Description

technical field [0001] The invention relates to a restoration process suitable for polluted clay. Background technique [0002] With the development of industrial and agricultural production and rural urbanization, soil pollution in my country has spread rapidly, and the degree of pollution has gradually increased. Heavy metals and organic substances from wastewater discharge, pesticide application, oil extraction, and atmospheric particle deposition enter the soil environment, destroying soil ecology, polluting groundwater and agricultural products, and endangering human health. With the increasing emphasis on environmental protection, the treatment of polluted sites has attracted widespread attention. [0003] Solidification / stabilization is a common method for the treatment of contaminated sites, which has the advantages of short treatment time and wide application range. The commonly used process flow for curing / stabilization is: screening→dosing (stabilization)→stirri...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B09C1/08
Inventor 韩清洁
Owner QINGDAO NEW WORLD ENVIRONMENT PROTECTION CO LTD
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