Low level radioactive waste liquid adsorption-solidification integrated treating system and technology

A waste liquid and process technology, applied in the field of "adsorption-solidification" two-stage integrated treatment system and treatment process, can solve the problems of weak zeolite activity, poor excitation effect, and low moisture content in the reaction environment, and reduce the capacity expansion ratio. , the effect of reducing radioactive pollution and reducing the number of equipment

Inactive Publication Date: 2014-01-08
SOUTHWEAT UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

When using zeolite that absorbs low-level radioactive waste liquid to prepare geopolymer solidified body, because the activity of zeolite is weaker than that of metakaolin, and the water content of the reaction environment is low, the excitation effect of conventional alkali excitation method is poor, so it is necessary to find a method that can fully stimulate the activity of zeolite. Methods

Method used

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  • Low level radioactive waste liquid adsorption-solidification integrated treating system and technology
  • Low level radioactive waste liquid adsorption-solidification integrated treating system and technology
  • Low level radioactive waste liquid adsorption-solidification integrated treating system and technology

Examples

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Effect test

Embodiment 1

[0022] The process for treating low-level radioactive waste in this embodiment includes the following steps:

[0023] a) Raw material preparation: put the low-level radioactive waste liquid, alkali activator, metakaolin and zeolite into the low-level radioactive waste liquid pool 1 and compact it, the alkali activator container 4, the metakaolin container 5 and the adsorption device 3;

[0024] b) Adsorption and purification: introduce low-level radioactive waste liquid into the adsorption device 3 for purification and adsorption;

[0025] c) Alkali-activated zeolite: first introduce the alkali activator into the adsorption device (3) to excite the zeolite, then introduce metakaolin into the adsorption device (3) and mix it evenly with the zeolite;

[0026] d) Polymerization and solidification: the mixture of zeolite and metakaolin in step c) is solidified and polymerized in the adsorption device (3) to form a geopolymer solidified body.

[0027] In this embodiment, the zeoli...

Embodiment 2

[0031] The process for treating low-level radioactive waste in this embodiment includes the following steps:

[0032] a) Raw material preparation: put the low-level radioactive waste liquid, alkali activator, metakaolin and zeolite into the low-level radioactive waste liquid pool 1 and compact it, the alkali activator container 4, the metakaolin container 5 and the adsorption device 3;

[0033] b) Adsorption and purification: introduce low-level radioactive waste liquid into the adsorption device 3 for purification and adsorption;

[0034] c) Alkali-activated zeolite: first introduce the alkali activator into the adsorption device (3) to excite the zeolite, then introduce metakaolin into the adsorption device (3) and mix it evenly with the zeolite;

[0035] d) Polymerization and solidification: the mixture of zeolite and metakaolin in step c) is solidified and polymerized in the adsorption device (3) to form a geopolymer solidified body.

[0036] In this embodiment, the zeoli...

Embodiment 3

[0040] The process for treating low-level radioactive waste in this embodiment includes the following steps:

[0041] a) Raw material preparation: put the low-level radioactive waste liquid, alkali activator, metakaolin and zeolite into the low-level radioactive waste liquid pool 1 and compact it, the alkali activator container 4, the metakaolin container 5 and the adsorption device 3;

[0042] b) Adsorption and purification: introduce low-level radioactive waste liquid into the adsorption device 3 for purification and adsorption;

[0043] c) Alkali-activated zeolite: first introduce the alkali activator into the adsorption device (3) to excite the zeolite, then introduce metakaolin into the adsorption device (3) and mix it evenly with the zeolite;

[0044] d) Polymerization and solidification: the mixture of zeolite and metakaolin in step c) is solidified and polymerized in the adsorption device (3) to form a geopolymer solidified body.

[0045] In this embodiment, the zeoli...

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Abstract

The invention discloses a low level radioactive waste liquid adsorption-solidification integrated treating system which comprises a low level radioactive waste liquid pool, an adsorption device, a purification water pool, an alkali-activator container and a metakaolin container. The low level radioactive waste liquid pool is communicated with the waste liquid inlet of the adsorption device, the purification water pool is communicated with the purification water outlet of the adsorption device, and the alkali-activator container and the metakaolin container are communicated with the alkali-activator inlet and the metakaolin inlet of the adsorption device respectively. The invention further discloses a low level radioactive waste liquid treating technology which comprises the steps of raw material preparation, adsorption and purification, alkali-activated zeolite and polymerization and solidification. The low level radioactive waste liquid adsorption-solidification integrated treating system is small in equipment number, simple in corresponding treating method and technology, and small in radioactive contamination. The low level radioactive waste liquid treating method can fully activate the activity of sliicon-alumininm in the zeolite, and can enhance the performance of the geopolymer solidified body remarkably.

Description

technical field [0001] The invention relates to a system and a treatment process for treating radioactive emissions, in particular to an "adsorption-solidification" two-stage integrated treatment system and a treatment process for low-level waste liquid. Background technique [0002] The wide application of nuclear energy not only brings various conveniences to human beings, but also brings huge health threats. In the process of using nuclear energy, a large amount of radioactive waste is often generated. These wastes degrade for a long time and easily cause serious environmental pollution. How to safely and effectively dispose of these radioactive wastes has become a key factor restricting the sustainable development of nuclear energy. Low-level radioactive liquid waste is an important part of radioactive waste. Commonly used methods for treating low-level liquid waste include adsorption, ion exchange, and membrane separation. These methods involve a large number of equipme...

Claims

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Application Information

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IPC IPC(8): G21F9/06G21F9/12G21F9/16
Inventor 徐中慧谭钦文彭熙吴丹丹王海龙郑磊
Owner SOUTHWEAT UNIV OF SCI & TECH
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