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Stable solidification treatment and sanitary landfill disposal method for polluted soil

A technology of polluted soil and solidification treatment, applied in the restoration of polluted soil and other directions, can solve the problem of lack of economical and feasible treatment and disposal technology for heavy metal contaminated soil, reduce the amount of earth and stone transport, fast reaction speed, and short treatment and disposal cycle. Effect

Inactive Publication Date: 2014-06-11
CHINA CITY ENVIRONMENT PROTECTION ENGINEERING LIMITED COMPANY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] 2. Existing contaminated soil treatment and disposal technologies generally have specific requirements for the form of agents, some can only use solid agents, some can only use liquid agents, and some can only use gaseous agents
[0005] 3. Lack of economically feasible treatment and disposal technologies for heavy metal-contaminated soil

Method used

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  • Stable solidification treatment and sanitary landfill disposal method for polluted soil

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Taking the polluted soil of a factory in Hubei Province as an example, the Cu content in the soil is 4289mg / kg, and the treatment method is as follows:

[0028] Step 1: According to the characteristic that the pollutant of the polluted soil is Cu, the treatment agent adopts the CMS-21 solid agent produced by Wuhan Urban Environmental Engineering Technology Co., Ltd., and adds the agent according to the mass ratio of the solid agent to the polluted soil at 5:100, Prepare the medicine solution according to the ratio of solid medicine and water 1:10.

[0029] Step 2: Send the prepared medicinal solution into the medicinal storage tank 4 for buffering and storage.

[0030] Step 3: Put the Cu-contaminated soil to be treated into the reaction tank 7, and use the gantry mixer 11 to evenly arrange the contaminated soil on the filter layer 71 in the reaction tank 7.

[0031]Step 4: The chemical solution in the chemical storage tank 4 is pressurized by the centrifugal pump 5 and...

Embodiment 2

[0034] Taking the polluted soil of a factory in Hubei Province as an example, the Zn content in the soil is 2593 mg / kg, and the treatment method is as follows:

[0035] Step 1: According to the characteristic that the pollutant of the polluted soil is Zn, the treatment agent adopts the CMS-21 solid agent produced by Wuhan Urban Environmental Engineering Technology Co., Ltd., and adds the agent according to the mass ratio of the solid agent to the polluted soil at 2:100, Prepare the medicine solution according to the ratio of solid medicine and water 1:10.

[0036] Step 2: Send the prepared medicinal solution into the medicinal storage tank 4 for buffering and storage.

[0037] Step 3: Put the Zn-contaminated soil to be treated into the reaction tank 7, and arrange the contaminated soil evenly on the filter layer 71 in the reaction tank 7 through the gantry mixer 11.

[0038] Step 4: The chemical solution in the chemical storage tank 4 is pressurized by the centrifugal pump 5 ...

Embodiment 3

[0041] Taking a certain fly ash polluted soil as an example, the Pb content in the soil is 3390mg / kg, and the treatment method is as follows:

[0042] Step 1: According to the characteristic that the pollutant of polluted soil is Pb, adopt N-12 type heavy metal fixing agent produced by Nippon Rattan Industry Co., Ltd., this medicament is a liquid medicament, according to the mass ratio of liquid medicament and polluted soil 2:100, add For medicine, prepare medicine solution according to the ratio of liquid medicine and water at 2:10.

[0043] Step 2: Send the prepared medicinal solution into the medicinal storage tank 4 for buffering and storage.

[0044] Step 3: Put the Pb-contaminated soil to be treated into the reaction tank 7, and arrange the contaminated soil evenly on the filter layer 71 in the reaction tank 7 through the gantry mixer 11.

[0045] Step 4: The chemical solution in the chemical storage tank 4 is pressurized by the centrifugal pump 5 and sent to the chemic...

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Abstract

The invention relates to a stable solidification treatment and sanitary landfill disposal method for polluted soil. According to the stable solidification treatment and sanitary landfill disposal method, a corresponding medicament solution is prepared by adopting a solid medicament or a liquid medicament through a stable solidification treatment system of the polluted soil according to pollution properties of different types of heavy-metal polluted soil; the soil which is severely polluted by heavy metals including Pb, Zn, Cu and the like is rapidly treated; the medicament solution and the heavy metals in the polluted soil are subjected to a series of physical and chemical processes by agitating, so that free-state heavy metals which can move easily in the polluted soil are changed into an insoluble state or an indissolvable state. The treated soil reaches sanitary landfill entrance standards and is conveyed into a sanitary landfill to be filled; the soil is filled by layers, is compacted layer by layer and is subjected to daily covering treatment, so as to realize sanitary treatment disposal of the polluted soil. The stable solidification treatment and sanitary landfill disposal method for the polluted soil is wide in applicable range, rapid in reaction speed, short in repairing period, good in flexibility, safe and stable to operate and is economically feasible.

Description

technical field [0001] The invention relates to a method for stabilizing and solidifying polluted soil and sanitary landfill disposal, belonging to the technical field of environmental protection. Background technique [0002] With the acceleration of my country's industrialization and urbanization process and people's increasing requirements for environmental protection, the relocation, suspension or closure of some industrial and mining enterprises have left a large number of polluted sites, the extensive use of pesticides, insecticides and fertilizers, and industrial "three wastes" The continuous increase of soil pollution has caused serious threats to human health. Soil pollution involves many industries such as chemical industry, mining, metallurgy, electroplating, oil refining, etc. The main pollutants include heavy metals, volatile organic compounds, semi-volatile organic compounds, polycyclic aromatic hydrocarbons, polychlorinated biphenyls, petroleum hydrocarbons, pe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09C1/00
Inventor 李社锋覃慧朱文渊刘更生肖国俊宋自新陶玲
Owner CHINA CITY ENVIRONMENT PROTECTION ENGINEERING LIMITED COMPANY
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