同时．考察了粒径、滤速等对沸石除氨氮效果的影响。
The influence of Zeolite size, filter velocity and contact time on removing -nitrogen has been discussed too.
无密实核心。具有滤速高、水头损失小、含污量大的优点。
The utility model has the advantages of high speed of filtering, small loss of water head, and generous content of dirt.
由于每一过滤周期内形成的滤饼层很薄，可明显提高平均滤速。
Because the cake layer is very thin each filter cycle, it can significantly improve the average filtration rate.
要提高活性炭的利用率，则需要降低滤速，增加水样与活性炭接触时间。
To improve the utilization of activated carbon, the filtration rate should be reduced and the touched time between the activated carbon and the water should be increased.
以KDF为滤料，研究了接触反应时间、滤层高度和滤速对铅和汞去除效果的影响。
In the KDF filter, effect of contact reaction time, filter bed height, and filtering velocity on lead and mercury removal was studied.
结果表明，选择合理的接触反应时间、滤层高度和滤速能有效去除微污染原水中的铅和汞。
The result shows that selection of suitable contact reaction time, filter bed height, and filtering velocity may result in efficient removal of lead and mercury.
介绍了东莞第三水厂恒滤速、恒水位过滤自控系统的原理，探讨了水位控制精度低的原因及改进方法。
Introduction was given to the principle of auto-control system for constant filtration velocity and constant water level in No.
不同滤层厚度、滤速和加药比ALT等条件下的过滤试验结果表明：滤层中单元滤床的特征尺寸的变化仅与空隙率有关。
The experiment reveals that the variation of UFE numbers is only dependent on the volume-specific deposit of filter, the effects of filtration velocity, bed depth and ALT ratio are not evident.
其特点是采用了板式层和管式层，首先开发和应用了在同一座滤池中以双级滤速过滤的新技术，使滤池的整体过滤效能获得提高。
The total filter efficacy is raised by developing and applying the new technic of double -velocity filtration in one and the same filter.
研究出的低聚合物加量胶凝酸体系，降低酸液滤失，实现酸液缓速和深穿透的目的。
The acid gelling of less additive can reduce leak in crack or hole and delay acid reaction to penetrating through farther.
研究出的低聚合物加量胶凝酸体系，降低酸液滤失，实现酸液缓速和深穿透的目的。
The acid gelling of less additive can reduce leak in crack or hole and delay acid reaction to penetrating through farther.
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