Processing method and system of radioactive chemical wastewater in nuclear power plant

Abstract

The invention discloses a processing method and a system of radioactive chemical wastewater in nuclear power plants, including the following steps: heat and dry the radioactive chemical wastewater; separate the wastewater into salt particles and gas with dust; use a dust remover to separate the gas into salt particles and exhaust gas; collect these salt particles to make into waste drum; filter the gas using a high-efficiency particulate air filter; exhaust the rest gas to atmosphere after passing test and perform the processing of chemical wastewater. Compared to existing technologies, the processing method of chemical wastewater has advantages of simple system configuration, high processing efficiency, non-secondary wastewater and high volume reduction factor. The generated secondary solid waste meets the requirement of waste package and waste disposal sites after effective packing. In addition to these advantages, the processing method also provides a processing system of radioactive chemical wastewater in nuclear power plants.

Description

technical field [0001] The invention belongs to the technical field of chemical waste liquid treatment, and more specifically, the invention relates to a treatment method and system for nuclear power plant radioactive chemical waste liquid. Background technique [0002] The chemical waste liquid of nuclear power plants generally has the characteristics of complex composition and high salt content, especially the chemical waste liquid containing radioactive substances, which is not suitable for treatment by ion exchange and other methods. [0003] At present, the chemical waste liquid of nuclear power plants containing radioactive substances is mainly treated by evaporation and drying in barrels. However, there are the following problems in the existing treatment method of nuclear power plant radioactive chemical waste liquid: [0004] First, the processing efficiency is low; [0005] Secondly, both chemical waste liquid and condensate need to go through steps such as evapo...

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Problems solved by technology

[0004] First, the processing efficiency is low;

[0005] Secondly, both chemical waste liquid and condensate need to go through steps such as evaporation and drying, the system setup and operation are cumbersome, and the energy consumption is high;

[0006] Thirdly, secondary waste liquid will be generated in the process of chemical waste liquid treatment, which will inevitably carry radioactivity and cause secondary pollution;

[0007] Finally, the radioactive activity of the evaporated raffinate itself is relatively high, and the requirements for radiation shielding are relatively high, which increases the cost of operation and maintenance

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