Method of removing tetrahydrofurfuryl alcohol from waste water in production of high temperature reactor fuel elements

A technology of fuel element and tetrahydrofurfuryl alcohol, which is applied in the field of removal of tetrahydrofurfuryl alcohol in high-temperature reactor fuel element production wastewater, can solve problems such as secondary pollution, and achieve the effect of ensuring smooth progress, good economy, and reducing the amount of radioactive waste

Active Publication Date: 2013-12-25
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Tetrahydrofurfuryl alcohol is a volatile organic compound, which is difficult to be intercepted in the distillation treatment of radioactive wastewater, and will enter the distillate through volatilization, causing secondary pollution

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] The wastewater volume is 100mL, the initial COD is 22354.6mg / L, and when the dosage of activated carbon is 1g and 5g respectively, after 60min of adsorption, the COD removal rates are 24.5% and 35.9%, respectively. That is to say, with the increase of activated carbon dosage, the removal rate of COD in wastewater showed an increasing trend. The adsorption capacity of activated carbon can reach 547.4mg / L.

Embodiment 2

[0016] The volume of wastewater is 100mL, the initial COD is 22354.6mg / L, and the dosage of activated carbon is 5g. After adsorption for 10min, 20min and 120min, the removal rate of COD is 31.6%, 33.2%, 36.9%, that is, the activated carbon adsorption treatment wastewater Tetrahydrofurfuryl alcohol has the advantages of fast speed and short adsorption time.

Embodiment 3

[0018] The wastewater volume is 100mL, the initial COD is 2083.2, 5318.0, 11018.7 and 22354.6mg / L respectively, and the dosage of activated carbon is 5g. After 120min of adsorption, the COD removal rates are 79.9%, 75.1%, 65.9% and 36.9%, respectively. . It shows that the lower the initial COD concentration in wastewater, the higher the removal rate under the same conditions. It is easy to see that after the wastewater is adsorbed by multi-stage activated carbon, the total removal rate of COD can be close to 100%.

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Abstract

The invention belongs to the technical field of nuclear waste treatment and discloses a method of removing tetrahydrofurfuryl alcohol from waste water in the production of high temperature reactor fuel elements. The method includes: using activated carbon as absorbent material to absorb the organic pollutant tetrahydrofurfuryl alcohol in radioactive waste water. The method has the advantages that the process is simple, the cost is low, control operations are easy, removal rate of organics is high, adaptability to changes of COD in incoming water is high, and the method is easy to use with other processes; the activated carbon is easy to reclaim and reuse. The method has unique advantages and promising application prospect for removing tetrahydrofurfuryl alcohol from waste water in the production of high temperature gas-cooled reactor fuel elements. After absorption with the activated carbon, the COD in the waste water is reduced greatly, load in subsequent treatment of organics can be reduced effectively, and requirements for the subsequent removal of ammonia and uranium in the radioactive waste water can be provided. In addition, the activated carbon which absorbs to saturation is reusable.

Description

technical field [0001] The invention belongs to the technical field of nuclear waste treatment, and in particular relates to a method for removing tetrahydrofurfuryl alcohol in wastewater produced by high-temperature reactor fuel elements. Background technique [0002] In 2012, the State Council passed the approval for restarting coastal nuclear power, marking that my country's nuclear power industry has re-entered a stage of rapid development. In today's increasingly tense energy environment, nuclear power will surely occupy a more important position and play a greater role in my country's energy structure. While vigorously developing nuclear power, the treatment of nuclear waste has drawn more and more attention from people. Especially in the Fukushima nuclear leakage accident in Japan, whether radioactive wastewater can be treated in a timely and effective manner will become an important factor restricting the smooth development of nuclear power. [0003] The inherently...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G21F9/12
Inventor 王建龙刘海洋
Owner TSINGHUA UNIV
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