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a cr 6+ Contaminated soil treatment device and method thereof

A technology of contaminated soil and treatment method, applied in the field of Cr6+ contaminated soil treatment devices, can solve problems such as poor treatment effect of contaminated soil, and achieve the effects of improving washing efficiency, lowering pH value, and saving costs

Active Publication Date: 2019-10-01
QINGDAO INST OF BIOENERGY & BIOPROCESS TECH CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] For the Cr-containing existing in the prior art 6+ The technical problem that polluted soil treatment effect is poor, the object of the present invention is to provide a kind of Gr-containing 6+ Contaminated Soil Treatment Methods

Method used

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  • a cr <sup>6+</sup> Contaminated soil treatment device and method thereof
  • a cr <sup>6+</sup> Contaminated soil treatment device and method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] A Cr containing 6+ The polluted soil treatment device includes a wet vibration sorting machine, a hydrocyclone I, a mixer, a hydrocyclone II, and a vibration dehydration device; the wet vibration sorting machine is connected to the hydrocyclone I through a conveying pipeline, and the The hydrocyclone I is connected with the hydrocyclone II through the mixer, the hydrocyclone II is connected with the vibration dehydration device, and the hydrocyclone I and the hydrocyclone II are connected through the sedimentation tank and the pressure filter; the vibration The dehydration device is sequentially connected with the primary mixer and the secondary mixer; the wet vibration sorter is connected with the supplementary water storage tank through a water pipe.

[0034] The equipment adopted in the present invention is a structure of large-capacity equipment. Since the soil and sand produced after wet vibration sorting contains a large amount of washing water during the first wa...

Embodiment 2

[0036] On the basis of embodiment 1, in the technical scheme of difference and embodiment 1, the continuous polluted soil washing device for the first time that above-mentioned wet vibrating sorting machine and hydrocyclone 1 are formed; Described agitator and hydrocyclone The continuous polluted soil secondary washing device composed of II, the mixer is equipped with a high-pressure air jet pipe, the soil to be washed and the HCl detergent are put into the hopper of the washing device together, and the pollutants, soil and sand are removed by physical mixing and chemical reaction. The washing water and polluted soil and sand are mixed in the wet vibrating sorter of the first washing device and transferred to the device, and the high-pressure air jet pipe is installed in the mixer of the second washing device for strong turbulent flow.

Embodiment 3

[0038] On the basis of Example 1, different from the technical solution of Example 1, a sieve plate is arranged in the wet vibratory sorting machine, the upper surface of the sieve plate is set as a diamond-shaped screen, and the lower intersection of the diamond-shaped screen is arranged in parallel. There are inclined baffles on both sides of the sieve plate, and two rows of parallel and staggered spray holes are arranged on the lower edge of the inclined baffle. The spray holes are connected to the high-pressure water pump through water pipes. The structure setting of the diamond-shaped screen on the sieve plate and the structure of the baffle ensure that the granular material must be flatly attached to the screen surface and move along the screen surface when sieving, reducing the mis-screening rate and solving the problem of high mis-screening rate of granular materials and sieve failure. At the same time, it solves the problem that the vibration direction of the tradition...

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Abstract

The invention discloses a treatment device for Cr6+-containing contaminated soil. The treatment device comprises a wet type vibratory sorting machine, a hydrocyclone I, a stirrer, a hydrocyclone II and a vibratory water removal device. The wet type vibratory sorting machine is connected with the hydrocyclone I through a conveying pipeline. The hydrocyclone I is connected with the hydrocyclone II through the stirrer. The hydrocyclone II is connected with the vibratory water removal device. The hydrocyclone I and the hydrocyclone II are both connected with a pressure filtering machine through a settling tank. The vibratory water removal device is sequentially connected with a primary stirring machine and a secondary stirring machine. The wet type vibratory sorting machine is connected with a make-up water storage tank through a water pipe. The invention further discloses a treatment method for the Cr6+-containing contaminated soil, the composite technology of soil washing, chemical reduction and fixation is selected, the economical and effective soil purification conditions are adopted, and effective soil purification is achieved.

Description

technical field [0001] The invention belongs to the technical field of contaminated soil treatment, in particular to a Cr-containing 6+ Contaminated soil treatment device and method thereof. Background technique [0002] Due to rapid economic development and resulting industrialization, serious environmental pollution caused by various pollutants occurs. In particular, China has achieved rapid economic development starting from the 1990s, but the treatment and recycling of pollutants caused by industrial activities is not good. [0003] The current trend of developed countries headed by the United States is to pass from the first-generation after-treatment technology to the second-generation pollution prevention technology, and recently enter the third-generation environmental purification technology, and invest in the purification and regeneration of polluted soil and groundwater. Huge financial and human resources, the global market for the purification of polluted soil ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B09C1/00B09C1/02B09C1/08
CPCB09C1/00B09C1/02B09C1/08
Inventor 高旭光周晓峰邱建超
Owner QINGDAO INST OF BIOENERGY & BIOPROCESS TECH CHINESE ACADEMY OF SCI
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