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.

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。

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Airflow from the large cyclone collector inhalation top return air duct blower, this machine is a closed loop system, the air flow, and circulation in the flow of positive and negative state.

气流由大旋风收集器上端回风管吸入鼓风机，本机整个气流系统是密闭循环的，并且是在正负状态下循环流动的。

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Raymond mill is a closed loop air flow system, and circulation in the flow of positive and negative state.

雷蒙磨粉机的气流系统是密闭循环的，并且是在正负状态下循环流动的。

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