A microwave solidification equipment for uranium tailings reservoir beach surface

Abstract

The invention discloses a microwave curing equipment for the beach surface of a uranium tailings reservoir, comprising: a microwave heating system, a lifting device, a tail gas treatment system, a power supply system and a moving device; The beach surface of the treated uranium tailings reservoir, the microwave energy output by the microwave generator directly acts on the beach surface to realize the purpose of high-temperature sintering and solidification of the uranium tailings on the beach surface; The heating system carries out stratification, orientation, and solidification treatment on the beach surface of the uranium tailings reservoir, and finally realizes the sintering treatment of the entire beach surface, and achieves the effect of volume reduction through the sintering treatment. In addition, the present invention uses microwave heating for sintering without any The heat conduction process can heat the inside and outside of the material at the same time, and the heating speed is fast and uniform. It has the characteristics of fast heating speed, short sintering time, strong penetration ability, high energy utilization rate and less secondary waste.

Description

technical field [0001] The invention relates to microwave treatment equipment for beach surfaces of uranium tailings reservoirs, in particular to microwave curing equipment for beach surfaces of uranium tailings reservoirs. Background technique [0002] Since the 21st century, energy shortage and environmental pollution have become two major problems facing mankind. Nuclear energy, as a cost-effective, clean and safe energy source, is considered to be one of the greatest achievements of mankind. The successful use of nuclear energy not only marks a new The arrival of the energy age has also become one of the important symbols to measure a country's comprehensive strength; however, with the rapid development of nuclear technology, the development of uranium resources has also rapidly increased. After smelting and purifying uranium resources, a large amount of uranium will inevitably be produced tailings; according to incomplete statistics, the total amount of uranium tailings...

AI Technical Summary

Problems solved by technology

[0002] Since the 21st century, energy shortage and environmental pollution have become two major problems facing mankind. Nuclear energy, as a cost-effective, clean and safe energy source, is considered to be one of the greatest achievements of mankind. The successful use of nuclear energy not only marks a new The arrival of the energy age has also become one of the important symbols to measure a country's comprehensive strength; however, with the rapid development of nuclear technology, the development of uranium resources has also rapidly increased. After smelting and purifying uranium resources, a large amount of uranium will inevitably be produced tailings; according to incomplete statistics, the total amount of uranium tailings in the world has reached 30 billion tons, and uranium tailings contain 238 U 234 U 230 Th, 226 Ra, 222 Rn, 210 Po, 210 Radioactive substances such as Pb, whose activity is usually n×10 5 Bq / kg; the gamma radiation absorbed dose rate on the sediment beach is usually n×10 -6 Gy / h; average 222 The Rn precipitation rate is about 3.25-9.85Bq / (m2 s); considering that most of the radioactive substances contained in uranium tailings are long-lived nuclides, their potential comprehensive effects can last for hundreds of thousands of years, and most of the uranium tailings currently The mine pool is in the stage of decommissioning treatment or has been decommissioned. The effect of decommissioning treatment will directly affect the safety of the tailings pool itself and the surrounding environment; therefore, how to isolate radioactive waste from the human living environment stably and safely for a long time has become a The most important part of security management work

[0003] At present, countries around the world have done a lot of work in the decommissioning environment of uranium tailings ponds, and achieved more effective results. Covering treatment is carried out to reduce the diffusion of pollutants in the tailings leachate, so that the tailings can be effectively sealed in the tailings pond; in recent years, some scholars have added curing agents such as resins and ion solutions to the tailings covering layer to enhance coverage layer governance effect to control gamma radiation and 222 Rn precipitation, but for the climate environment with long rainy season and large water volume in our province, the above methods have poor treatment effect, and some tailings ponds that have been treated have lost their protective effect

[0004] The invention patent with the authorized announcement number CN102844819B introduces a microwave-enhanced system, method and equipment for the pyrolysis and vitrification of radioactive materials, which reduces the The volume of radioactive waste is small; the microwave heating device of the invention comprises: a microwave source, a waveguide and a tank, but the invention is suitable for pyrolysis and liquefaction of solid radioactive waste for the purpose of stabilizing the waste for safe storage and disposal; the system receives and The number of layers of treated solid waste feed is limited by the size of the tank. When the solid waste feed settled in the tank has been treated, the tank needs to be sealed and stored or disposed of according to the appropriate regulations, so the device is not suitable for large Treatment of tailings pond beach surface of the area

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