摘要
上海合流污水出口泵站是将预处理厂的出水提升后输送到竹园附近的长江边，通过江底排放扩散管排入长江，设计规模为４５ｍ３／ｓ。泵房内装１０台１６００ＨＬＢ１２Ａ导叶式半调节大型混流泵，其中４台是变频调速泵，６台是定速泵。由于长江潮位、泵站进水流量的变化会引起预处理厂出水池液位、泵站前池液位和出水池液位的变化，因而管路的特性曲线也是变化的，水泵的工况点也在变化，所以就要求自动控制系统根据管路特性曲线的变化通过自动调整水泵的开启台数和是否调速来调水泵的工况点，从而使水泵在高效区运行，达到节能的目的。本文介绍了该出口泵站的控制原理、自动控制系统的组成和功能以及控制的安全联锁、图控系统和变频调速系统。
The effluent of the wastewater pretreatment plant in Shanghai will be pumped by the outlet pumping station of the combined sewer system to Zhuyuan at the riverside and dispersed to the Yangtze River via a diffuser tube. The pumping station was designed with capacity of 45 cubic meters per second and equipped with ten blade guided semi regulated pumps of type 1600 HLBA 12A, four of them frequency controlled and another six constant speed. An automation is necessary to control the starting numbers and the speeds of the pumping assembles according to the hydraulic characteristics of the pipesystem to meet the variations of the operating status of the pumps caused from the variations of the water levels at the output pool of the wastewater treatment plant and the forebay of the pumping station, the pumping flowrate and the fluctuation of the tidal level of Yangtze River. This will be essential to guarantee the pumping assembles operating at the high efficiency range and to save the energy consumption. The principle, composition and the functions of the automatic control system of this pumping station including the safety chained mechanism, diagram control and frequency speed control systems are presented in this paper.
出处
《给水排水》
CSCD
北大核心
1997年第11期5-8,共4页
Water & Wastewater Engineering
