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Radioactive wastewater treatment technology and synthesis of treatment agent of radioactive wastewater

A technology for radioactive wastewater and chemical treatment. It is applied in radioactive purification, nuclear engineering, etc., and can solve the problems of high treatment cost, pollution, and discharge of nuclear-contaminated wastewater.

Inactive Publication Date: 2014-03-05
叶绍朋
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Medical and nuclear pollution radioactive wastewater and waste residues are seriously polluted. Many radioactive wastewater are treated with membrane filtration, ultrafiltration, evaporation concentration, ion exchange, chemical precipitation, coagulation precipitation, microbial flocculation adsorption precipitation, low temperature and reduced pressure evaporation, dilution Discharge, landfill in the desert, dumping into the ocean, general solidification, discharge of concentrated liquid, most of which are untreated concentrated waste liquid and waste residue sub-packaged and transported to other backward countries for landfill, stacking or throwing into the deep sea ocean, for emergencies Major nuclear pollution accidents, resulting in huge discharges of nuclear polluted wastewater, high treatment costs, and certain secondary pollution

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] For the treatment of high-salinity seawater with 6.8% sodium chloride content of radioactive cesium-137, strontium-90, americium-241, and tritium at PH=6.7 wastewater treatment, add radioactive wastewater treatment chemicals according to 3.5% of the wastewater volume, and mix and stir for 20 minutes. Precipitate for 30 minutes, add 1.5% dilute nitric acid solution dropwise to the wastewater in the reactor, stir the reaction at a speed of 30 rpm to 60 rpm, adjust the pH value of the wastewater = 1-6.9, and add Y3 -8013 controls the PH value of the wastewater after the reaction = 6-9, adds 0.36% solution of silicate grafted polyacrylamide from 100ppm to 200ppm, and slowly stirs for 10 minutes at a speed of 10-20 rpm. After stopping stirring and settling for 30 minutes, the total α radiation in the effluent water should be ≤0.01Bq / l, and the total β radiation should be ≤8.0Bq / l, which should reach the standard and be discharged into the raw water of the sewage treatment pla...

Embodiment 2

[0021] For the treatment of radioactive strontium-90 and americium-241 in saline groundwater pollution, add 1.9% dilute sulfuric acid solution to the wastewater and mix well to form strontium sulfate precipitation. After separating the strontium sulfate waste residue, put it in the upper clear water Add 3% dilute nitric acid solution and mix evenly, add Y3-8013 and stir evenly until the pH value of the wastewater = 6-9, then add 180-300ppm polysilicate grafted polyacrylamide solution, stir for 5 minutes, After settling for 30 minutes, the total α radiation in the effluent water should be ≤0.09Bq / l and the total β radiation should be ≤6.0Bq / l, which should meet the standards and be discharged to the raw water of the urban domestic sewage treatment plant. After pressing the waste residue, add 15% of Y3-8013 and mix evenly, add 20% of yellow sand, add 30% of stones, stir and mix evenly to briquette, add Y3-8013 and 10% of water to mix evenly, The surface of the final waste residu...

Embodiment 3

[0023] For the treatment of seawater containing radioactive elements protium, deuterium, tritium, thorium, thallium, strontium-90, americium, potassium-40, heavy metals lead, cadmium, mercury, arsenic, chromium, nickel, copper, manganese, 50% is added to the wastewater -80% Y3-8013 mixed evenly, add 3MP pressure to solidify, then mix Y3-8013 with 10% water, add neutron moderator made of waste residue after 10% lead-acid battery wastewater treatment, mix evenly, apply Cover and embed the solidified waste residue, and solidify the coating layer 30cm-50cm on the surface of the waste residue, and detect the total alpha radiation within 10 meters around the solid ≤0.01Bq / l, the total beta radiation ≤9.0Bq / l, and the r radiation reduction by 99.99% above radiant energy. It can be buried in uninhabited land or deep sea with little ocean current, without secondary pollution.

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Abstract

The invention discloses a radioactive wastewater treatment technology and the synthesis of a treatment agent of radioactive wastewater. A modified product Y3-8103 is used for chemically reacting with radioactive wastewater, all heavy metal elements and all radioactive elements, namely cesium137, uranium 235, thorium, plutonium, thallium, protium, deuterium, tritium, radon, Sr-90 and radium, listed in the periodic table of elements and wastewater generated by all artificial nuclides. Alpha radioactive rays, beta radioactive rays, gamma radioactive rays and neutron radioactive rays are attenuated in a nationally specified mode. The radioactive wastewater treatment technology and the synthesis of the treatment agent of the radioactive wastewater can also be used for treating radioactive seawater or waste residues generated by wastewater treatment and can be used for treating heavy metal wastewater discharged by a lead-acid battery enterprise and an electronic plant and mine nucleus waste residues. The treatment cost of the radioactive wastewater is different along with different radioactive element concentration contents or different waste residue radioactive element concentration contents and different atomic weights in the wastewater, and the treatment cost of the wastewater and the waste residues ranges from RMB 90 yuan / m<3> to RMB 680 yuan / m<3>, radioactive energy with the alpha, beta and gamma radioactive ray radiant quantity smaller than or equal to 0.01Bq / 1-1.10Bq / 1 can be discharged to the ambient environment by the wastewater and the waste residues, the emission limit standard allowed by the international is reached, and secondary pollution is avoided. The radioactive wastewater treatment technology and the synthesis of the treatment agent of the radioactive wastewater are suitable for treating wastewater and waste residues of a nuclear power plant and treating wastewater and waste residues in mining with the radioactive elements, and are also suitable for treating wastewater containing heavy metal, namely lead, cadmium, mercury, arsenic, chromium, nickel, copper and manganese.

Description

1. Technical field [0001] The present invention relates to seawater, fresh water, river water, ground water, nuclear power plant waste water, radioactive elements thallium, cesium-137, thorium, uranium 235, strontium-90, americium, cobalt mined in various pH values ​​and various salt contents -60, protium, deuterium, tritium, radon, etc. waste water treatment and radioactive mixed waste water and waste residue treatment containing various heavy metals lead, cadmium, mercury, arsenic, the total alpha rays of the treated radioactive waste water ≤ 0.01Bq / l-0.1 Bq / l, the total beta ray ≤0.1Bq / l-10Bq / l discharges up to the standard, the r-ray reduces the radiation energy by more than 90%, and can solidify the radioactive elements to prevent the radiation of the ray outward. The treated effluent and cured radioactivity Waste slag and ray radiation, after being wrapped, meet the national discharge standards, and can be buried in mines or deep seas, with low treatment costs and no sec...

Claims

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Application Information

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IPC IPC(8): G21F9/20
Inventor 叶绍朋
Owner 叶绍朋
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