Humic acid subsection cleaning efficient repair device for chromium-contaminated soil

A technology of chromium-contaminated soil and humic acid, applied in the restoration of polluted soil, grain processing, etc., can solve problems such as hidden dangers of pollution

Inactive Publication Date: 2016-12-07
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0011] The purpose of the present invention is to overcome the shortcomings of the existing chromium-contaminated soil remediation technology and to invent a chromium-contaminated soil humic acid segmental cleaning and high-efficiency repair device. Mixing and in-situ reduction; segmental reduction treatment to ensure the reduction effect and reduce the amount of reducing agent; reduce the soil liquid humic acid to granulate, wrap and block the exudation and migration of hexavalent chromium in the particles, and achieve permanent reduction and fixation. Restoring soil planting function for safe, low-cost permanent sustainable green in-situ restoration

Method used

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  • Humic acid subsection cleaning efficient repair device for chromium-contaminated soil

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Embodiment Construction

[0023] Embodiment, the segmental cleaning and high-efficiency restoration device for humic acid in chromium-contaminated soil includes a pulverizer 1, a screw conveyor 5, an intermediate silo 6, a screw mixing conveyor 7, etc., and the inlet 2 of the pulverizer is equipped with a reducing agent atomizing nozzle 3, The outlet 4 of the pulverizer is connected to the screw conveyor 5; the screw conveyor 5 is obliquely upward 5°-60°, and the outlet is connected to the upper entrance of the intermediate silo 6; the height-to-diameter ratio of the intermediate silo 6 is 3-10:1, and the volume is 1-5 times the processing capacity per hour of the pulverizer 1; the lower part of the middle silo 6 is a conical outlet with a cone angle greater than 45°, which is connected to the entrance of the screw mixing conveyor 7; the screw mixing conveyor 7 is inclined upward 2°-50 °, the length of the screw mixing conveyor 7 is 3-35 meters, the inlet is equipped with a secondary reducing agent nozz...

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Abstract

The invention discloses a humic acid subsection cleaning efficient repair device for chromium-contaminated soil. The humic acid subsection cleaning efficient repair device comprises a pulverizer, a screw conveyer, an intermediate bunker and a screw mixing conveyor; a reducing agent spray head is additionally arranged at a pulverizer inlet; an pulverizer outlet is connected into the intermediate bunker through the screw conveyer; an outlet in the lower part of the intermediate bunker is connected into an inlet of the screw mixing conveyor; a second reducing agent spray head is additionally arranged at the inlet of the screw mixing conveyor; a liquid humic acid spray head is additionally arranged at a place, close to a soil outlet, of the screw mixing conveyor; and the soil outlet faces downwards. The overall process is closed for reduction detoxication and aggregation, and secondary pollution in the process is eliminated.

Description

1. Technical field [0001] The invention provides a chromium-contaminated soil humic acid segmental cleaning and high-efficiency restoration device, which relates to the purification and treatment of polluted soil, in particular to the restoration of chromium-contaminated soil. 2. Background technology [0002] Soil pollution will pose a serious threat to the ecological environment, food safety and human health. In recent years, soil pollution caused by heavy metal pollutants has been particularly prominent, and soil contaminated by chromium is the most important. [0003] There are nearly 70 major chromium slag-contaminated sites in China, together with a large number of electroplating and leather enterprises, which have caused serious soil chromium pollution, threatening or endangering groundwater and drinking water sources. In addition, municipal solid waste (sludge, fly ash, garbage) and phosphate fertilizers contain chromium. Due to the agricultural reuse of these solid ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09C1/08B02C21/00
CPCB02C21/00B09C1/08
Inventor 田原宇乔英云谢克昌田斌
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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