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利用热气流在输送砂子过程中同时将砂烘干的装置(以下简称 DSG)在我厂经过三次改造后,生产率提高了一倍半、耗煤量减少一半、维修量减少四分之三,现正稳定可靠地服务于铸造生产。笔者对 DSG 测定、整理、分析后发现流体力学中“所有情况下压头损失都与速度压头成正比”的论断当通道上有顺应性粘附物时不适用,进而提出流体作紊流流动时的摩擦压力损失定律。对于气力吸送管道的阻力系数及某些风道元件的阻力推荐用笔者归纳的、符合测定值的公式进行计算。并以数学公式论证了 DF 分离器的分离机理。目前大幅度地提高生产率的唯一途径是装设湿砂预热炉。
The use of hot air in the process of transporting sand while sand drying device (hereinafter referred to as DSG) in our plant after three transformation, the productivity doubled by half, reducing coal consumption by half, reducing the amount of three-fourths maintenance, and now Is stable and reliable service in the casting production. The author of the DSG measurement, sorting, analysis and found that the fluid mechanics “in all cases the head pressure loss is proportional to the pressure head” argument is not applicable when the channel has a compliant adhesive, and then put the fluid for turbulent flow When the friction pressure loss law. For the resistance of pneumatic suction pipe coefficient and the resistance of some air duct components recommended by the author summarized in line with the measured value of the formula to be calculated. The mathematic formula is used to demonstrate the separation mechanism of DF separator. The only way to substantially increase productivity now is to install a wet sand preheater.