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| Energy Saving Technology Transformation of Circulating Water Pump for 9MW Waste Heat Power Generation Unit |
| Tianrui Xindeng Zhengzhou Cement Co., Ltd. , Zhengzhou Henan 452470, China |
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Abstract A 5 000t/d cement clinker production line is equipped with a 9MW waste heat power generation system, which uses two 4-stage (4 magnetic poles) 10kV high-voltage motors to drive an old-fashioned horizontal double suction circulating water pump. There are problems including high circulating water pump speed, low energy efficiency, high power consumption, vulnerable mechanical seals, and high maintenance costs. By evaluating the thermal performance of the end heat exchange equipment of the circulating water pump, analyzing the performance parameters of the cooling tower, applying the “Three Element Flow Theory” and using CFD simulation technology for flow field simulation analysis, a new “3+1” high-efficiency fluid energy-saving circulating water pump is designed for technical transformation, and a 6-stage (6 magnetic poles) low speed (980r/min) high-voltage motor is replaced with a set. After the technological transformation, the hourly power consumption of a single circulating water pump can be reduced by about 71 kW/h, saving about 0.24 million yuan in electricity bills per year. The mechanical seals and bearings of the circulating water pump and motor are replaced less frequently, and the equipment maintenance costs are significantly reduced. The energy-saving effect and economic benefits are significant.
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Received: 20 April 2024
Published: 25 January 2025
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