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通过水模拟试验,对采用椭圆形和圆形浸渍管的RH设备分别进行了混匀时间和循环流量的测定,比较后得知:在真空压力97709Pa,插深130mm的条件下,当驱动气体流量大于2.33m3/h时,椭圆浸渍管的RH循环流量优势明显,大于2.7m3/h时混匀时间明显减少。测出椭圆浸渍管RH设备在不同工艺参数下混匀时间和循环流量的变化规律,并进行了流场流线试验。分析得知,在相同的单位浸渍管截面积供气强度下,椭圆管RH的循环流量和混匀时间均优于普通RH,试验条件下循环流量可增大50%,最后回归出2种模型间循环流量的关系式。
Through the water simulation test, the mixing time and the circulating flow rate of the RH equipment using the oval and the circular immersion pipes were respectively measured. After comparison, it was found that under the conditions of a vacuum pressure of 97709 Pa and a penetration depth of 130 mm, when the driving gas flow rate Greater than 2.33m3 / h, elliptical immersion pipe RH circulation flow obvious advantages, greater than 2.7m3 / h mixing time was significantly reduced. The variation law of mixing time and circulating flow under different process parameters was measured and the flow field test was carried out. The analysis shows that under the same unit immersion pipe cross-sectional area of gas supply strength, the elliptical tube RH circulation flow and mixing time are better than ordinary RH, the experimental conditions, the circulating flow can be increased by 50%, and finally return to the two models Inter-cycle flow of the relationship.