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| Exploration and Practice of Improving the Energy Efficiency Level of Cement Technical Equipment Operation |
| Gansu Qilian Mountain Cement Group Co., Ltd. , Lanzhou Gansu 710030, China |
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Abstract This paper analyzes the problems existing in the operation of key energy-using equipment in 20 cement production lines and puts forward a series of technical reform measures to improve the energy efficiency of equipment. By installing a fine material pre-screening device in front of the limestone crusher, the large process fan with low work efficiency is transformed into a high-efficiency and energy-saving fan, the Roots fan is replaced with a "magnetic/air" suspension centrifugal blower, and the single-pressure screw air compressor is transformed into a "permanent magnet frequency conversion/two-stage compression" high-efficiency air compressor. Energy-saving facilities such as permanent magnet direct drive motor, permanent magnet roller, permanent magnet coupling, and variable frequency energy-saving pump are applied in the transmission equipment such as powder separator & elevator & conveyor etc., and the treatment of pipeline air leakage and "running and dripping" is strengthened. The operation energy efficiency level of cement technology equipment continues to improve, except for 2 production capacity replacement lines, the remaining 18 cement production lines have reached the comprehensive energy consumption standard of cement unit product above grade 3, and the comprehensive power consumption of cement has been reduced by about 6 kW·h/t.
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Received: 29 March 2023
Published: 25 September 2023
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