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Online detection system of aerosol under severe environment

A detection system and aerosol technology, applied in the direction of measuring devices, particle size analysis, scientific instruments, etc., can solve the problems of inability to realize real-time online detection of aerosols in the containment, large errors, complicated operation, etc., to achieve long-term online monitoring, The effect of increasing the upper temperature limit

Active Publication Date: 2019-06-07
SHANGHAI JIAO TONG UNIV +1
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Problems solved by technology

The existing technology involves many structures, has high requirements on the characteristics of the filter membrane, and the operation is complicated, so it is impossible to realize real-time online detection of aerosols in the containment under accident conditions
Due to the characteristics of high temperature, high pressure and high water vapor concentration of nuclear power plant aerosols, especially the existence of water vapor, the online measurement devices currently on the market directly measure the extracted aerosols with large errors

Method used

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  • Online detection system of aerosol under severe environment
  • Online detection system of aerosol under severe environment
  • Online detection system of aerosol under severe environment

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Embodiment Construction

[0024] Such as figure 1 As shown, it is a real-time on-line detection system capable of detecting aerosol gas with high water vapor solubility under two conditions of high temperature and high pressure and high temperature and normal pressure involved in this embodiment, including: sequentially connected aerosol sampling mechanism, cooling and dilution device, on-line measurement device, rear flow measurement control device, exhaust gas collection device, wherein: the aerosol sampling mechanism is set in the pressure vessel, and the extracted gas to be tested is drawn out of the container through the ventilation pipe and enters the cooling and dilution device; the aerosol sampling mechanism It communicates with the cooling and dilution device through the ventilation pipe, and there is a ball valve in the middle; the gas to be tested entering the cooling and dilution device is mixed with the dilution gas with lower temperature, lower pressure and no particles in the dilution cha...

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Abstract

The invention discloses an online detection system of aerosol under a severe environment. The online detection system comprises an aerosol sampling mechanism, one or more stages of cooling dilution devices, an online measuring device, a rear flow measuring control device and an exhaust gas collecting device which are sequentially connected; the aerosol sampling mechanism is arranged in a pressurecontainer of to-be-measured gas to extract the to-be-measured gas and convey the to-be-measured gas to the cooling dilution devices; the cooling dilution devices mix the to-be-measured gas with particle-free dilution gas with the low temperature and low pressure in a dilution cavity for cooling and decompression; the online measuring device extracts the to-be-measured gas through a sampling probein the dilution cavity and detects the to-be-measured gas online; and the rear flow measuring control device controls the extraction flow and feeds the measured gas into the exhaust gas collecting device through a ventilation pipeline to complete measurement. The maintenance cost is low, and long-term online measurement can be achieved.

Description

technical field [0001] The invention relates to a technology in the field of nuclear power production safety, specifically a harsh environment aerosol with a temperature between 100-200°C, a pressure between 1-10bar, and a steam concentration between 1%-95%. real-time online detection system. Background technique [0002] Aerosol measurement technology is commonly used in the field of nuclear energy to detect the solubility distribution and changes of aerosol in the reactor containment to determine whether there is leakage of radioactive fission products, so as to ensure the safety of the reactor. The environment in the reactor containment is different from the normal atmospheric environment. Especially under accident conditions, a large amount of aerosols are released into the containment along with high-temperature and high-pressure water vapor from the pipeline, resulting in high temperature, high pressure, and high humidity in the containment aerosols. . The existing a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N1/22G01N15/02
Inventor 佟立丽王俊豪付亚茹高志超李玉祥
Owner SHANGHAI JIAO TONG UNIV
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