Ecological purification treatment system and treatment method for low-level uranium-containing waste water

A technology for purification and treatment of waste water, applied in radioactive purification, nuclear engineering, etc., can solve problems that are difficult to meet the needs of long-term operation, and achieve the effect of low-cost ecological purification treatment

Pending Publication Date: 2018-12-25
SOUTHWEAT UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the treatment of uranium-containing radioactive wastewater from decommissioned nuclear facilities will last for decades or even hundreds of years, traditional chemical and physical treatment methods are difficult to meet the needs of long-term operation, and there is an urgent need to find more economical and environmentally friendly treatment technologies

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] Example 1: The ecological purification treatment system for uranium-containing low-level radioactive wastewater is composed of enriched plant absorption layer, modified zeolite purification layer, and gravel water collection layer from top to bottom. There is a 1cm PVC drip irrigation pipe on it and Drip irrigation pipe network with pipe to pipe spacing of 50 cm; perforated drainage pipes in the gravel catchment layer.

[0012] The plant-enriched absorption layer is composed of sand with a particle size of 3 mm and a thickness of 20 cm. The uranium enrichment plant planted on the enrichment plant absorption layer is amaranthus ( Acalypha wilkesiana Muell. Arg ). The modified zeolite purification layer is composed of modified zeolite with a particle diameter of 3 mm and a thickness of 20 cm. The modified zeolite in the modified zeolite purification layer is prepared by crushing, sieving, and grinding the pumice to obtain pumice particles with a sieve particle size of 3...

Embodiment 2

[0014] Example 2: The ecological purification treatment system for uranium-containing low-level radioactive wastewater is composed of enrichment plant absorption layer, modified zeolite purification layer, gravel water collection layer, etc. from top to bottom. There is a 1cm PVC drip irrigation pipe on it and Drip irrigation pipe network with pipe to pipe spacing of 50 cm; perforated drainage pipes in the gravel catchment layer.

[0015] The enrichment plant absorption layer is composed of sand with a particle size of 5 mm and a thickness of 30 cm. The uranium enrichment plant planted on the enrichment plant absorption layer is Foxtail ( Setaria viridis L. Beauv ). The modified zeolite purification layer is composed of modified zeolite with a particle size of 5 mm and a thickness of 30 cm.

[0016] The modified zeolite in the modified zeolite purification layer is prepared by crushing, sieving, and grinding the pumice to obtain pumice particles with a sieve particle size o...

Embodiment 3

[0018] Example 3: The ecological purification treatment system for uranium-containing low-level radioactive wastewater is composed of enrichment plant absorption layer, modified zeolite purification layer, gravel water collection layer, etc. from top to bottom. There is a 1cm PVC drip irrigation pipe on it and Drip irrigation pipe network with pipe to pipe spacing of 50 cm; perforated drainage pipes in the gravel catchment layer.

[0019] The plant-enriched absorption layer is composed of sand with a particle size of 4 mm and a thickness of 25 cm. The uranium enrichment plants planted on the absorption layer of enrichment plants are reeds ( Phragmites australis Cav. Trin. ex Steu ).

[0020] The modified zeolite purification layer is composed of modified zeolite with a particle diameter of 4 mm and a thickness of 25 cm.

[0021] The modified zeolite in the modified zeolite purification layer is prepared by crushing, sieving, and grinding the pumice to obtain pumice particle...

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PUM

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Abstract

The invention discloses an ecological purification treatment system and treatment method for low-level uranium-containing waste water. The ecological purification treatment system for the low-level uranium-containing waste water is a layered structure and is composed of an enriched plant absorption layer with the thickness of 20-30 cm, a modified zeolite purification layer with the thickness of 20-30 cm, and a gravel water collecting layer with the thickness of 20-30 cm from top to bottom, PVC drip irrigation pipes with the thickness of 1 cm are arranged on the system, and a drip irrigation pipe network is formed with the pipe-to-pipe spacing of 50 cm; a perforated drainage pipe is arranged in the gravel water collecting layer. The low-level uranium-containing waste water passes through the drip irrigation pipe network and passes through the enriched plant absorption layer, the modified zeolite purification layer and the gravel water collecting layer to be treated and purified for 3-5hours from to bottom, and purified outlet water is discharged from the perforated drainage pipe in the gravel water collecting layer. The ecological purification treatment system and treatment methodfor the low-level uranium-containing waste water can effectively solve the double pollution problems of uranium radioactivity and heavy metal toxicity in radioactive polluted water bodies of uranium mining and metallurgy, uranium tailing and the like at low cost.

Description

technical field [0001] The invention relates to the ecological purification of waste water, in particular to the ecological purification treatment of uranium-containing low-radiation waste water. Background technique [0002] Uranium-containing low-level radioactive wastewater mainly includes wastewater from uranium mining, dressing and purification, decommissioning of nuclear facilities, decontamination and washing of nuclear facilities, nuclear reactor wastewater, spent fuel reprocessing, radioactive isotope production and application wastewater, and uranium tailings beaches And seepage and other uranium-containing wastewater. Production and experimental wastewater of nuclear weapons and certain other industries, such as uranium, society, radium mineral extraction of rare earth elements and other wastewater. [0003] According to my country's "Radioactive Waste Classification Standard" (GB 9133-1995), most of the uranium-containing wastewater belongs to the first-level lo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G21F9/06G21F9/12
CPCG21F9/06G21F9/12
Inventor 罗学刚李琛
Owner SOUTHWEAT UNIV OF SCI & TECH
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