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火力发电厂的冷却水系统采用冷却池、直流供水或混流等冷却方式时,进、排水渠道及渠上建筑物是不可缺少的。由于渠道长年运行,水中含有一定热量,因此电厂渠道及渠上建筑物的冻害防护问题容易被人们所忽视。事实上无论是间断性运行的渠道或常年运行的渠道均有冻害防护问题,并且各有其自己的特点。如果设计和施工不加以注意,必将造成危害。
When the cooling water system of a thermal power plant adopts a cooling pool, direct-current water supply, or mixed-flow cooling, it is indispensable for the intake and drainage channels and the canal construction. As the channels run for many years, the water contains certain amounts of heat, so the protection against freezing damage in power plant channels and canal structures is easily overlooked by people. In fact, both the intermittent operation channels and the perennial channels have frozen protection problems, and each has its own characteristics. If design and construction do not pay attention, it will cause harm.