Frazil Ice Blockage of Intake Trash Racks
Frazil Ice Blockage of Intake Trash Racks
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Frazil 冰堵塞进水垃圾架
DOI：
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发表时间：
1991
期刊：
影响因子：
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通讯作者：
S. Daly
中科院分区：
文献类型：
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作者：
S. Daly
摘要：北方地区湖泊和河流的运行取水因冰的存在而变得复杂。其中最棘手的问题之一是进气垃圾架上的冰冻堆积，可能会完全堵塞垃圾架，导致进气设施迅速而意外地关闭。在极端情况下，堵塞会导致进气垃圾架坍塌。进水口垃圾架的堵塞偶尔发生，最常发生在夜间，天气寒冷，而且总是在水下。因此，观察和测量的机会是有限的。本报告讨论了以下主题：河流和湖泊的阻塞过程；应对巴西堵塞；利用热能抑制巴西的生产；机械去除;反冲洗，振动；爆破;拆除垃圾架；在巴西条件下运作。
Abstract : Operating water intakes in lakes and rivers in northern regions is complicated by the presence of ice. One of the most difficult problems is the accumulation of frazil ice on the intake trash rack, which can completely block the trash rack and rapidly and unexpectedly shut down the intake facility. In extreme cases the blockage can cause the intake trash rack to collapse. Blockages of intake trash racks occur sporadically, most often at night, in cold weather and always underwater. As a result, opportunities for observation and measurement are limited. This report discusses the following topics: The blockage process in rivers and in lakes; Coping with frazil blockage; Suppressing frazil production by using heat; Mechanical removal; Back flushing, Vibration; Blasting; Removal of trash racks; and Operating under frazil conditions.