Ultra-low pressure reverse osmosis system and method for treating iodine ions in radioactive polluted water by using same

Abstract

The invention provides an ultra-low pressure reverse osmosis system, wherein a feeding device is provided with a raw water tank; a stock solution at an outlet of the raw water tank is pressed into a multi-medium filter through a centrifugal pump; the multi-medium filter changes membrane pressure through a multi-stage pump and enables the stock solution to enter a reverse osmosis membrane componentfor treatment; and a concentrated water outlet pipe of the reverse osmosis membrane component is provided with a valve to adjust a standard recovery rate of the system. The invention also discloses amethod for treating iodine ions in radioactive polluted water by adopting the system, which comprises the following steps: under the conditions that the operating pressure is 0.3-0.8MPa, the temperature is 20+ / -3 DEG C and the standard recovery rate of the system is 15.0%-17.0%, the maximum radioactive decontamination factor of iodine ions of the reverse osmosis system can reach 920 by using a polyamide roll composite membrane. The method can effectively remove iodine ions in radioactive polluted water, the separation process has no phase change, energy consumption is low and operation can becarried out at normal temperature. The method has wide application prospect in the fields of emergency water supply, radioactive wastewater treatment, nuclear concentration and the like 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 ...

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

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