Objective:To confirm the transportation and evaporation efficiency of micro droplets sprayed by high-pressure nozzles from purified tritium-containing wastewater with carrier gas in the horizontal evaporation chamber.Methods:A scale test bench with a single high-pressure nozzle had been built based on design conditions and similarity criteria to explore the designed evaporation characteristics of generated micro droplets in the horizontal evaporation chamber. At the same time, combined with experimental data, a suitable evaporation model was constructed using the Discrete Phase Model (DPM) in Ansys Fluent. On this basis, further simulation and analysis were conducted on the evaporation process and efficiency under the condition of multiple nozzles in the desighed horizontal evaporation chamber.Results:For single nozzle tests, the particle size of micro droplets along the nozzle centerline was between 12-50 μm and the particle size distribution was similar to the Rosin-Rammler distribution. Besides, the relative light intensity decreased exponentially with distance, indicating that the particle size and concentration of micro droplets both decreased rapidly, which means the evaporation rate of micro droplets was rapid. For the simulation of multiple nozzles injection in the desighed horizontal evaporation chamber, even for the hardest design condition, the evaporation percentage reached up to 99%, and small amount of the escaping micro droplets continued to evaporate during the process of mixing with other process exhaust until complete evaporation in the vertical chimney section.Conclusions:Under the conditions of desighed sprayed particle size distribution, typical operating conditions and the incoming flow similar to the supposed area, the complete evaporation of the micro droplets can be basically achieved in the horizontal evaporation chamber, so as to ensure the complete evaporation of purified tritium-containing wastewater from the outlet of the chimney.

OBJECTIVETo compare the clinical efficacy on vascular cognitive impairment with no dementia (VCIND) between the combined therapy of auricular acupuncture and acupuncture and the simple acupuncture.

METHODSOne hundred patients of VCIND were randomized into a combined therapy of auricular acupuncture and acupuncture group (a combined therapy group) and an acupuncture group, 50 cases in each one. The basic internal medicine treatment was applied in the two groups. Additionally, in the combined therapy group, auricular acupuncture and's three needling therapy were used. pizhixia (AT), xin (CO), shen (CO), gan (CO), erzhong (HX) were selected in auricular acupuncture, once every Monday, Wednesday and Friday;,andwere selected in's three needling therapy, once a day. In the acupuncture group,'s three needling therapy was just provided, once a day. The treatment was given for 4 weeks in the two groups. Montreal cognitive assessment (MoCA) and social function activities questionnaire (FAQ) were adopted for the evaluation comparison before treatment and in 2 weeks and 4 weeks after treatment in patients of the two groups.

RESULTSCompared with those before treatment, the total scores of MoCA were improved in 2 and 4 weeks after treatment in the two groups (all<0.01). The score in the combined therapy group was improved more apparently as compared with that in the acupuncture group (<0.01). FAQ score was reduced in the two groups (all<0.05). The score in the combined therapy group was reduced more apparently as compared with that in the acupuncture group (<0.05). As compared with the result in 2 weeks of treatment, MoCA score was improved in the two groups in 4 weeks of treatment (both<0.01), the improvements in the combined therapygroup were more obvious than those in the acupuncture group (<0.05) and FAQ score was reduced in the two groups (<0.05), but the difference was not significant between the two groups (>0.05).

CONCLUSIONSThe combined therapy of auricular acupuncture and acupuncture effectively improve the cognitive function and social function, which are better than the effects of simple acupuncture in VCIND. The improvement of the combined therapy in social function is more advantageous in the treatment of the first two weeks.