Method and system for carrying out sediment dredging and ectopic treatment on seasonal river heavy metal pollution

A technology for polluting sediment and heavy metals, which is applied in the fields of sludge treatment, chemical instruments and methods, water/sludge/sewage treatment, etc. It can solve the problems of lack of systematic heavy metal pollution dredging and sediment treatment technologies.

Active Publication Date: 2015-07-29
山东省环科院环境工程有限公司
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Problems solved by technology

[0014] The present invention aims at the problem that current seasonal rivers lack systematic and targeted heavy metal pollution dredging and sediment control technology, and provides a systemic, targeted and flexible solution for seasonal river heavy metal pollution with good treatment effect and easy implementation Sediment dredging and off-site treatment method and system

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  • Method and system for carrying out sediment dredging and ectopic treatment on seasonal river heavy metal pollution

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Embodiment Construction

[0076] Referring to the standards of "pebbles and crushed stones for construction" (GB14685-2011) and "sand for construction" (GB14684-2011), according to the particle size of the sediment, the sediment can generally be divided into pebbles, sand and mud, and pebbles refer to Rock particles with a particle size larger than 4.75mm formed by natural weathering, water flow handling, sorting, and accumulation; sand refers to naturally generated rock particles with a particle size larger than 0.75mm and smaller than 4.75mm after artificial mining and screening, including River sand, lake sand, mountain sand, and desalinated sea sand, but excluding soft and weathered rock particles; mud refers to rock particles with a particle size of less than 0.75mm, including river sand, lake sand, mountain sand, and desalinated sea sand, but excluding Does not include soft, weathered rock particles.

[0077]Referring to the above standards, sand can be divided into coarse sand with a particle si...

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Abstract

The invention relates to a method and a system for carrying out sediment dredging and ectopic treatment on seasonal river heavy metal pollution. The method comprises the following steps: (1) carrying out status survey; (2) dividing unit projects and arranging a diversion channel; (3) building a riverway sediment storage tank and an accident sediment storage tank; (4) carrying out project dredging; (5) carrying out quenching and tempering treatment on the sediment conveyed to the shore; (6) after quenching and tempering treatment, carrying out mud-water separation on the sediment; (8) screening the slurry obtained after mud-water separation; (9) carrying out resource utilization; (10) treating tail water; (11) stably solidifying and mixing the sediment; (12) carrying out stable solidification treatment. The system comprises a river sediment dredging system and a shore sediment treatment system. The method and the system are convenient to implement and operate, have higher pertinence and good treatment effect, and do not cause secondary pollution.

Description

technical field [0001] The invention relates to a system and method for dredging and ex-situ treatment of heavy metal-polluted sediments in water bodies such as seasonal rivers (including rivers, rivers, rivers, and river courses), and belongs to the technical field of treatment and restoration of polluted sediments. Background technique [0002] Sediment is the surface sediment at the bottom of the water body, which is a mixture of microorganisms, humus, soil and sediment, etc. It is formed by depositing at the bottom of the water body after long-term physical, chemical, biological and water transport. Sediment can reflect the historical process of water body evolution, and is an important part of natural water ecosystems such as rivers, lakes, and tidal flats at river estuaries. [0003] The heavy metals in the sediment come from atmospheric dustfall, precipitation, soil erosion, surface runoff, various sewage, solid waste, and pesticides. They are long-term, cumulative, l...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F11/00C02F11/12C02F11/14C02F9/04E02B3/02
Inventor 马涛顾俊杰王睿苟晓东王留锁
Owner 山东省环科院环境工程有限公司
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