A long-term fluidized aerosol generating device with self-dispersion function

Abstract

The invention provides a long-term fluidized aerosol generating device with a self-dispersing function. The long-term fluidized aerosol generating device consists of an airflow supply part, an airflow drying part, a powder ebullition fluidizing part, a powder self-dispersing part and a powder online continuous supply part. Due to the unique design of the airflow drying section and an ebullition fluidizing plate, powder can be in a fluidized state under the action of the bubbling airflow of the fluidizing plate. In the self-dispersing section, part of lumpy powder is further dispersed under the action of high-speed airflow, so that the problems of viscous powder aggregation, clustering, vibrating caking and water absorbing deliquescence are effectively solved, the problems of particle unevenness and powder discharging discontinuity, which occur in the aerosol powder supply process, are effectively avoided, and the even and continuous supply of aerosol powder is ensured.

Description

technical field [0001] The invention relates to a solid powder aerosol generating device, in particular to a long-term fluidized aerosol generating device with self-dispersing function. Background technique [0002] When a severe reactor accident occurs, the high-temperature core melt will melt through the pressure vessel, so that a large amount of radioactive aerosol contained in the core escapes from the pressure vessel and enters the containment vessel. As the last barrier to prevent the release of radioactive products to the environment, the integrity of the containment becomes particularly important. At the same time, the molten core falls to the bottom of the containment vessel and reacts with the concrete of the bottom to produce a large amount of non-condensable gas. With the continuous accumulation of non-condensable gas, the pressure inside the containment vessel will gradually increase, which may eventually reach the pressure limit of the containment vessel, resu...

AI Technical Summary

Problems solved by technology

However, because the aerosol particles to be distributed are viscous powders, have poor fluidity, and are prone to condensation, the aerosol generating device in this patent still has the following problems: 1. Affected by the humidity of the carrier gas, the aerosol particles are easily Absorbing deliquescence, agglomeration and agglomeration affect the fluidization characteristics of aerosol; 2. The aerosol agglomeration and agglomeration in the riser tube cannot be further dispersed, and is directly distributed to the test system, resulting in instability of aerosol distribution concentration

3. Due to the long-term high-frequency vibration, the aerosol in the ring cavity will coalesce into agglomerates and even accumulate tightly, so that the ring gap will be blocked and the powder supply will be difficult when the ring gap is small, so that Unable to ensure stable delivery of aerosols at lower concentrations

Therefore, it is difficult to ensure the continuous and stable distribution of viscous aerosols into the high-pressure environment by using the existing aerosol generating device, so that the accuracy of the filtration performance test of the containment filtration and discharge system cannot be guaranteed

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