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Method and apparatus for environmentally-friendly recycling treatment of heavy metal soil pollution

A cyclic treatment and heavy metal technology, which is applied in the field of soil pollution control, can solve the problems of lagging soil leaching technology and complete equipment development, long repair cycle and high operating costs, and achieve the effects of improving soil heavy metal activity, promoting migration and efficient utilization.

Pending Publication Date: 2019-08-16
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0017] 1. High energy consumption and high operating costs;
[0018] 2. The development of soil leaching technology and complete sets of equipment that can be applied on a large scale is relatively lagging behind;
[0020] 4. The repair cycle is long and the effect is not significant

Method used

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  • Method and apparatus for environmentally-friendly recycling treatment of heavy metal soil pollution
  • Method and apparatus for environmentally-friendly recycling treatment of heavy metal soil pollution
  • Method and apparatus for environmentally-friendly recycling treatment of heavy metal soil pollution

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] Equipment for leaching heavy metals in the soil, including liquid distribution tank (1), first centrifugal pump (2), well site control room (3), carbon dioxide flow meter (6), liquid oxygen storage tank (7), oxygen vaporizer ( 8), oxygen flow meter (9), liquid injection hole (10), liquid suction hole (11), submersible pump (12), sump (13), filter (14), ion exchange tower (15) ), the second centrifugal pump (16); wherein the outlet of the liquid distribution tank (1) is connected to the inlet of the first centrifugal pump (2) by pipes, and the outlet of the first centrifugal pump (2) is connected to the liquid injection header Enter the wellsite centralized control room (3) and divide it into liquid injection drilling branch pipes with the same number of liquid injection holes, the liquid injection drilling branch pipe is connected to the liquid injection drilling (10), the submersible pump ( 12) Set at the bottom of the pumping hole (11), the outlet of the submersible pu...

Embodiment 2

[0066] Equipment for leaching heavy metals in the soil, including liquid distribution tank (1), first centrifugal pump (2), well site control room (3), carbon dioxide source (4), carbon dioxide flow meter (6), liquid oxygen storage tank (7) ), oxygen vaporizer (8), oxygen flow meter (9), liquid injection drilling (10), suction drilling (11), submersible pump (12), sump (13), filter (14) ), ion exchange tower (15), second centrifugal pump (16), activated carbon adsorption tower (18); wherein the outlet of the dosing tank (1) is connected to the inlet of the first centrifugal pump (2) by pipes, so The outlet of the first centrifugal pump (2) is connected to the liquid injection header into the wellsite control room (3) and divided into the same number of liquid injection boreholes as the liquid injection holes, and the liquid injection borehole branch pipe is connected to the station The liquid injection borehole (10), the submersible pump (12) is arranged at the bottom of the li...

Embodiment 3

[0078] Equipment for leaching heavy metals in soil, including liquid distribution tank (1), first centrifugal pump (2), well site control room (3), liquid carbon dioxide storage tank (4), carbon dioxide vaporizer (5), carbon dioxide flow meter ( 6), liquid oxygen storage tank (7), oxygen vaporizer (8), oxygen flow meter (9), liquid injection drilling (10), pumping drilling (11), submersible pump (12), liquid collection Pool (13), filter (14), ion exchange tower (15), second centrifugal pump (16); wherein the outlet of the dosing tank (1) is connected to the inlet of the first centrifugal pump (2) by pipe , The outlet of the first centrifugal pump (2) is connected with a liquid injection main pipe to enter the wellsite centralized control room (3) and is divided into the same number of liquid injection boreholes as the liquid injection holes, and the liquid injection borehole branch pipes Connect the liquid injection borehole (10), the submersible pump (12) is arranged at the bo...

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Abstract

The invention discloses a method for environmentally-friendly recycling treatment of heavy metal soil pollution, wherein the method comprises: leaching heavy metals from soil, preparing an active carbon adsorption material, and preparing carbon dioxide. The invention further discloses an apparatus for the method, wherein the apparatus comprises a soil heavy metal leaching device, an active carbonadsorption material preparing device and a carbon dioxide preparing device. According to the present invention, by using the method and the apparatus, the soil heavy metal pollution can be efficientlytreated through the in-situ leaching and the environmentally friendly CO2 and O2 leaching agent; the method has characteristics of strong operability and no secondary pollution; and by using the straw to prepare active carbon, the natural resources can be completely improved to improve the utilization efficiency of crops, and the adsorption saturated active carbon in the soil heavy metal leachingprocess is subjected to oxygen-rich combustion so as to provide the carbon dioxide needed for the soil heavy metal leaching, such that the environmental protection process recycling the carbon can beformed.

Description

Technical field [0001] The invention belongs to the technical field of soil pollution control, and specifically relates to a method and device for green and recyclable treatment of heavy metal soil pollution. Background technique [0002] With the large-scale development and utilization of mineral resources, the rapid development of industrial production and the widespread use of various chemical products, pesticides and fertilizers, pollutants containing heavy metals enter the environment through various channels, causing soil, especially farmland soil, to become more polluted by heavy metals. . At present, the soils of various countries in the world have different degrees of pollution. The average annual emission of Hg in the world is about 1.5×104t, Cu about 3.4 million tons, Pb about 5 million tons, Mn about 15 million tons, and Ni about 100t. In Europe, there are millions of hectares of farmland polluted by heavy metals; in Japan, the area of ​​farmland polluted by Cd, Cu, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09C1/02C02F9/04C02F101/20
CPCB09C1/02C02F1/42C02F1/283B09C2101/00C02F2101/20
Inventor 那平李明珠乔斌
Owner TIANJIN UNIV
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