然后被循环为“灰”水，用来冲马桶，最后最为“黑”水离开内部水系统。

It is then recycled into "gray" water, which is used to flush toilets before being taken out of the internal water system as "black" water.

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将高炉冲渣水进行分级过滤、沉淀，利用冲渣水的余热，建立了高炉冲渣水余热供暖供热系统。

Through carrying out fractional filtration, depositing and using the waste heat of washing blast furnace slag water, the heating and district heating line system is set up.

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在燃煤电厂冲灰水闭路循环系统中，水力输灰管和回水管的结垢是所需解决的主要问题。

In the closed circulation system of ash-sluicing water of coal-fired power plant, the scaling of the hydraulic ash transport pipes and the backwater pipes is the main problem that need to be solved.

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