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Treatment method for cooperative disposal of polluted soil via cement kiln

A technology for co-processing and soil pollution, applied in cement production and other directions, can solve the problems of secondary hazardous waste, waste of resources, restrictions on use applicability, etc., to improve the effect of treatment and utilization.

Inactive Publication Date: 2020-01-14
BEIJING URBAN CONSTR NORTH CONSTR
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are only simple incineration and landfill methods for the treatment of polluted waste in China, which not only fail to make rational use of resources and cause waste of resources, but may even form secondary hazardous waste and cause greater harm. Although the following methods of polluted soil treatment The contaminated soil has been treated, but its applicability is limited. The original solidification / stabilization + landfill treatment failed to eradicate heavy metal elements, and the whereabouts of the contaminated soil became a problem. The concentration of pollutants suitable for phytoremediation is low. Shallow contaminated soil treatment, there is no application project in China
Electric repair technology is expensive and has harsh conditions, and there is no domestic application project. Ex-situ washing needs to treat wastewater, which is costly. In-situ leaching has a high risk of secondary pollution, which is extremely important for groundwater pollution control. Therefore, we propose a A method for co-processing contaminated soil in cement kilns

Method used

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  • Treatment method for cooperative disposal of polluted soil via cement kiln
  • Treatment method for cooperative disposal of polluted soil via cement kiln

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Such as Figure 1-2 As shown, a cement kiln co-processing contaminated soil treatment method, comprising the following steps:

[0029] (1) Crushing of raw materials: Put the limestone and sandstone in the raw material into a pulverizer for crushing to obtain lime powder and sandstone powder, which are kept for later use. At the same time, the content of various heavy metal components in the polluted soil is detected. Put into the drying machine to dry, the drying temperature is 110 ℃, the drying time is 55min, when pulverizing, the stirring speed is 1000r / min, and the stirring time is 22min, and the raw material is made of the following components by weight: 110 parts of pollution Soil, 140 parts of limestone, 90 parts of sandstone, 55 parts of iron powder, 70 parts of fly ash, 900 parts of clear water, 30 parts of microorganisms, 40 parts of fixative;

[0030] (2) Preliminary homogenization: Put the contaminated soil, sandstone and iron powder into the homogenizer to ...

Embodiment 2

[0036] Such as Figure 1-2 As shown, a cement kiln co-processing contaminated soil treatment method, comprising the following steps:

[0037] (1) Crushing of raw materials: Put the limestone and sandstone in the raw material into a pulverizer for crushing to obtain lime powder and sandstone powder, which are kept for later use. At the same time, the content of various heavy metal components in the polluted soil is detected. Put into the drying machine to dry, the drying temperature is 110 ℃, the drying time is 55min, when pulverizing, the stirring speed is 1000r / min, and the stirring time is 22min, and the raw material is made of the following components by weight: 110 parts of pollution Soil, 140 parts of limestone, 90 parts of sandstone, 55 parts of iron powder, 70 parts of fly ash, 900 parts of clear water, 30 parts of microorganisms, 40 parts of fixative;

[0038] (2) Preliminary homogenization: Put the contaminated soil, sandstone and iron powder into the homogenizer to ...

Embodiment 3

[0044] Such as Figure 1-2 As shown, a cement kiln co-processing contaminated soil treatment method, comprising the following steps:

[0045] (1) Crushing of raw materials: Put the limestone and sandstone in the raw material into a pulverizer for crushing to obtain lime powder and sandstone powder, which are kept for later use. At the same time, the content of various heavy metal components in the polluted soil is detected. Put into the drying machine to dry, the drying temperature is 110 ℃, the drying time is 55min, when pulverizing, the stirring speed is 1000r / min, and the stirring time is 22min, and the raw material is made of the following components by weight: 110 parts of pollution Soil, 140 parts of limestone, 90 parts of sandstone, 55 parts of iron powder, 70 parts of fly ash, 900 parts of clear water, 30 parts of microorganisms, 40 parts of fixative;

[0046] (2) Preliminary homogenization: Put the contaminated soil, sandstone and iron powder into the homogenizer to ...

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Abstract

The invention discloses a treatment method for cooperative disposal of polluted soil via a cement kiln. The method comprises the following steps: crushing of raw materials: crushing limestone and sandstone in raw materials in a crusher to obtain lime powder and sandstone powder, reserving the lime powder and sandstone powder for later use, and detecting the contents of various heavy metal components in the polluted soil; and primary homogenization: respectively homogenizing the polluted soil, sandstone and iron powder in a homogenizer, and carrying out standing for 12-23 min. According to theinvention, the polluted soil and other raw materials are reasonably proportioned, so the utilization of the polluted soil can be improved, the waste is comprehensively utilized, and recycling and harmlessness of the waste are realized; reduction of the content of heavy metals in the soil is well realized through the addition of microorganisms capable of absorbing the heavy metals in the soil; andthe heavy metal absorption effect of the microorganisms is improved by strictly controlling the growth temperature of the microorganisms.

Description

technical field [0001] The invention relates to the technical field of soil treatment, in particular to a treatment method for cement kiln co-processing polluted soil. Background technique [0002] Contaminated soil is harmful to the environment and human health, and how to properly dispose of it is the key. At present, there are only simple incineration and landfill methods for the treatment of polluted waste in China, which not only fail to make rational use of resources and cause waste of resources, but may even form secondary hazardous waste and cause greater harm. Although the following methods of polluted soil treatment The contaminated soil has been treated, but its applicability is limited. The original solidification / stabilization + landfill treatment failed to eradicate heavy metal elements, and the whereabouts of the contaminated soil became a problem. The concentration of pollutants suitable for phytoremediation is low. Shallow contaminated soil treatment, there...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B7/26C04B7/24
CPCC04B7/24C04B7/26Y02P40/10
Inventor 曾辉钟国龙吴楠王振兴王卫新郭腾张有振杨雷刚
Owner BEIJING URBAN CONSTR NORTH CONSTR
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