An ultra-low pressure reverse osmosis system and its method for treating iodide ions in radioactively polluted water

An iodide ion, ultra-low pressure technology, applied in the field of water treatment, can solve problems such as unfavorable sudden emergencies, and achieve the effect of good iodine removal effect, broad application prospect and low energy consumption

Inactive Publication Date: 2021-01-26
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In recent years, experts and scholars at home and abroad have carried out a series of research on the treatment of radionuclides in water by reverse osmosis technology, but most of them are high-pressure and large-scale devices, which are not conducive to responding to sudden emergency accidents. The reverse osmosis system to treat radioactively polluted water is one of the current focuses

Method used

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  • An ultra-low pressure reverse osmosis system and its method for treating iodide ions in radioactively polluted water

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] The raw water containing 15.2mg / L iodine is hydraulically injected into the above-mentioned membrane module, the operating temperature is 20.0°C, the pH value is 7.78, the pressure across the membrane is 0.30MPa, the radioactivity decontamination factor of iodine in the product water is 780, and the system recovery rate is 16.3% .

Embodiment 2

[0038] The raw water containing 15.2mg / L iodine is hydraulically injected into the above-mentioned membrane module, the operating temperature is 22.4°C, the pH value is 7.81, the pressure across the membrane is 0.50MPa, the radioactivity decontamination factor of iodine in the product water is 831, and the system recovery rate is 16.7% .

Embodiment 3

[0040] The raw water containing 15.2mg / L iodine is hydraulically injected into the above membrane module, the operating temperature is 22.1°C, the pH value is 7.92, the pressure across the membrane is 0.70MPa, the radioactivity decontamination factor of iodine in the product water is 916, and the system recovery rate is 16.7% .

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Abstract

The invention provides an ultra-low pressure reverse osmosis system. The feeding device is provided with a raw water tank, and the raw liquid at the outlet of the raw water tank is pressed into a multi-media filter through a centrifugal pump. The raw liquid enters the reverse osmosis membrane module for treatment, and the concentrated water outlet pipe of the reverse osmosis membrane module is provided with a valve to adjust the standard recovery rate of the system. It also discloses a method for treating iodide ions in radioactively polluted water by using the system, using a polyamide roll-type composite membrane, operating at an operating pressure of 0.3-0.8MPa, a temperature of 20±3°C, and a system standard recovery rate of 15.0%-17.0%. Under certain conditions, the radioactive decontamination factor of the reverse osmosis system for iodide ions can reach up to 920. The invention can effectively remove iodide ions in radioactively polluted water, has no phase change in the separation process, low energy consumption and operates at normal temperature. It has broad application prospects in the fields of emergency water supply, radioactive wastewater treatment and nuclear enrichment in sudden nuclear accidents.

Description

technical field [0001] The invention belongs to the technical field of water treatment, and in particular relates to an ultra-low pressure reverse osmosis system and a method for treating iodide ions in radioactively polluted water. Background technique [0002] In today's increasingly scarce resources, nuclear energy has always been considered as a green and environmentally friendly new energy source. Radioactive elements have been widely used in industry, military, energy, medical and agricultural fields. While nuclear technology brings convenience to people, it also leaves potential safety hazards. The Wentzkell nuclear accident in the UK in 1957, the Three Mile Island nuclear accident in the United States in 1979, the Chernobyl nuclear accident in the former Soviet Union in 1986, and the Fukushima nuclear power plant accident in Japan in 2011 have caused serious harm to the environment, ecology and human health. , and radioactive iodine, as one of the common pollutants ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D61/08B01D69/12G21F9/06
CPCB01D61/08B01D69/12G21F9/06
Inventor 顾平李志超何利斌张光辉董丽华侯立安
Owner TIANJIN UNIV
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