Device and method for treating radioactive organic waste liquid by using supercritical water oxidation

A supercritical water oxidation and organic waste liquid technology, applied in radioactive purification, nuclear engineering, etc., can solve the problems of low safety and public acceptance, difficult equipment design and processing, high maintenance costs, etc., and achieve compact structure and small footprint , The effect of simple device structure

Active Publication Date: 2017-06-13
UNIV OF SCI & TECH OF CHINA
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Problems solved by technology

The disadvantages of the incineration method are that it is difficult to design

Method used

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  • Device and method for treating radioactive organic waste liquid by using supercritical water oxidation
  • Device and method for treating radioactive organic waste liquid by using supercritical water oxidation
  • Device and method for treating radioactive organic waste liquid by using supercritical water oxidation

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Embodiment Construction

[0040] The present invention will be further described below in conjunction with the drawings and specific embodiments.

[0041] The main steps of using supercritical water oxidation method to treat radioactive organic waste are as follows:

[0042] Step (1), configure the required oxygen source (hydrogen peroxide, high purity oxygen or O 3 Etc.), in line with the required oxygen mass fraction ratio in the process of oxidizing organic matter;

[0043] Step (2), carry out related treatment of organic waste (to meet the normal injection of high-pressure pump), this step will be different according to the different treatment methods of the treated material, but its ultimate goal is to allow the normal injection of organic material;

[0044] Step (3): Calculate the pump speed v under the corresponding conditions according to the residence time t required for each reaction, the relevant reactor volume and the oxygen mass fraction ratio;

[0045] Step (4), start to adjust the speed of the hig...

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Abstract

The invention discloses a device and method for treating radioactive organic waste liquid by using supercritical water oxidation. The device for treating the radioactive organic waste liquid by using the supercritical water oxidation is integrated with a high pressure liquid pump, a high pressure gas pump, a supercritical water oxidation kettle, a heating system (tube furnace), a one-way valve, a back-pressure valve and a radioactive operation glove box to form a supercritical water oxidation device; by using a continuous operation method, the organic waste liquid is oxidized to rapidly and efficiently transform the radioactive organic waste liquid into radioactive waste water and carbon dioxide. At present, the radioactive organic waste liquids to be treated in time generally come from nuclear related units; the typical of the radioactive organic waste liquids to be treated in time is waste oil generated by nuclear power plant workshops, tributyl phosphate (TBP) + diluting agent in the reprocessing process of spent nuclear fuel, scintillation liquids generated in the nuclear medicine process and so on. According to the device and method for treating the radioactive organic waste liquid by using the supercritical water oxidation, by using the supercritical water oxidation technique, the organic waste liquid containing radioactive nuclide is completely oxidized, so that the organic waste liquid containing radioactive nuclide is completely transformed into carbon dioxide, water and inorganic salts; therefore, the organic waste liquid containing radioactive nuclide becomes common radioactive waste water to be convenient to treat.

Description

Technical field [0001] The invention relates to the technical field of radioactive organic waste liquid treatment, in particular to a device and method for supercritical water oxidation treatment of radioactive organic waste liquid. Background technique [0002] The so-called supercritical refers to a special fluid state of matter. When the substance in gas-liquid equilibrium is raised and pressured, the thermal expansion causes the density of the liquid to decrease, and the increase in pressure increases the density of the gas phase. When the temperature and pressure reach a certain point, the interface between the gas and liquid phases disappears and becomes uniform. Phase system, this point is the critical point. The critical point temperature of water is 647.3K (374.1°C) and the pressure is 22.1MPa. Water exceeding the critical point becomes supercritical water. In the supercritical state, the physical and chemical properties of water have undergone tremendous changes, whi...

Claims

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Application Information

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IPC IPC(8): G21F9/22
CPCG21F9/22
Inventor 林铭章何辉肖家鑫王亮翁汉钦刘金平
Owner UNIV OF SCI & TECH OF CHINA
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