Contaminated soil medium-temperature dry-screen weight reduction treatment system and application

A technology for polluted soil and treatment system, which is applied in the field of temperature and dry sieving reduction treatment system in polluted soil, can solve the problems of high energy consumption of high temperature sieving and poor economic efficiency of sieving reduction, avoid excessive temperature and reduce exhaust gas treatment. Difficulty, the effect of reducing gas treatment costs

Active Publication Date: 2016-09-07
BCEG ENVIRONMENTAL REMEDIATION CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Therefore, the technical problem to be solved by the present invention is to overcome the defects of high energy consumption of high-temperature screening in the prior art and poor economical efficiency of screening and reduction of contaminated soil with high heavy metal content, thereby providing a medium-temperature drying method for contaminated soil. Screening reduction treatment system, process and application

Method used

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  • Contaminated soil medium-temperature dry-screen weight reduction treatment system and application
  • Contaminated soil medium-temperature dry-screen weight reduction treatment system and application
  • Contaminated soil medium-temperature dry-screen weight reduction treatment system and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0063] (1) Use the polluted soil medium temperature reduction treatment system of the present invention to process polluted soil

[0064] Contaminated soil and exhaust gas enter the rotary dryer, and fuel and fresh air pass through the combustion equipment to generate high-temperature flue gas. Under the action of the carrier gas circulation fan, the high-temperature flue gas contacts the polluted soil and undergoes circular heating. At the same time, the metal cylinder on the rotary dryer is turned over, so that the water in the polluted soil evaporates into the flue gas. After the water is reduced, the viscosity of the polluted soil drops significantly, and the soil particles are greatly broken. The diameter of the screen of the rotary dryer is 10mm. During the rotation of the rotary dryer, the soil less than 10mm enters the hopper through the mesh around the rotary dryer; while the qualified graded gravel larger than 10mm is discharged from the end outlet of the rotary dryer...

Embodiment 2

[0072] (1) Use the polluted soil medium temperature reduction treatment system of the present invention to process polluted soil

[0073] Contaminated soil and exhaust gas enter the rotary dryer, fuel and fresh air pass through the burner to generate high-temperature flue gas, and under the action of the carrier gas circulation fan, the high-temperature flue gas contacts the polluted soil and undergoes circular heating. At the same time, the metal cylinder on the rotary dryer is turned over, so that the water in the polluted soil evaporates into the flue gas. After the water is reduced, the viscosity of the polluted soil drops significantly, and the soil particles are greatly broken. The diameter of the screen of the rotary dryer is 20mm. During the rotation of the rotary dryer, the soil less than 20mm enters the hopper through the mesh around the rotary dryer; while the qualified graded gravel larger than 20mm is discharged from the end outlet of the rotary dryer. Complete pr...

Embodiment 3

[0080] (1) Use the polluted soil medium temperature reduction treatment system of the present invention to process polluted soil

[0081] Contaminated soil and exhaust gas enter the rotary dryer, fuel and fresh air pass through the burner to generate high-temperature flue gas, and under the action of the carrier gas circulation fan, the high-temperature flue gas contacts the polluted soil and undergoes circular heating. At the same time, the metal cylinder on the rotary dryer is turned over, so that the water in the polluted soil evaporates into the flue gas. After the water is reduced, the viscosity of the polluted soil drops significantly, and the soil particles are greatly broken. The diameter of the screen of the rotary dryer is 4mm. During the rotation of the rotary dryer, the soil less than 4mm enters the hopper through the mesh around the rotary dryer; while the qualified graded gravel larger than 4mm is discharged from the end outlet of the rotary dryer. Complete pre-c...

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Abstract

The invention discloses a contaminated soil medium-temperature dry-screen weight reduction treatment system and an application, and belongs to the technical field of contaminated soil weight reduction treatment. The system comprises a rotary dryer and a heating device, wherein the rotary dryer is provided with a metal cylinder with a horizontal inclination angle; the heating device is composed of combustion equipment and a flue gas circulating system connected between the combustion equipment and the rotary dryer; and the heating device is used for providing a temperature higher than or equal to 65 DEG C and lower than 130 DEG C to soil materials in the metal cylinder of the rotary dryer. The contaminated soil medium-temperature dry-screen weight reduction treatment system is remarkable in weight reduction effect especially for contaminated soil which is relatively high in moisture content, more in clay, not obvious in normal-temperature screening reduction or not suitable for leaching.

Description

technical field [0001] The invention relates to the technical field of contaminated soil reduction treatment, in particular to a medium-temperature dry screening reduction treatment system for contaminated soil and its application. Background technique [0002] Soil is one of the important natural resources that human beings rely on for survival, and it is also an important part of the human ecological environment. The rapid development of industry and mining has resulted in increasingly serious soil pollution. With the development of technology and the progress of environmental governance, the discharge of pollutants has been greatly reduced. However, the previous discharge has produced a large amount of high-pollution risk soil. Organic pollutants in the soil will change the physical and chemical properties of the soil, destroy the local ecosystem, bring direct and indirect toxic effects to the animals and plants in the area, and cause harm risks to humans through the enr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09C1/00B09C1/06
CPCB09C1/00B09C1/06
Inventor 闫利刚刘鹏谢方文丁浩然王艳伟
Owner BCEG ENVIRONMENTAL REMEDIATION CO LTD
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