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| The Application of Walking-step High-efficiency Grate Cooler in Energy-saving and Consumption-reducing Renovation of Cement Production Lines |
| ZHANG Jixiao
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| Anhui Tiepeng Cement Co., Ltd. of CRM, Ma′anshan Anhui 230000, China |
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Abstract To address the high failure rate, low heat recovery efficiency, and high energy consumption of a reciprocating push grate cooler in a cement production line, an upgrade was carried out by installing the walking-step high-efficiency grate cooler (W9830R19) with a central roller crusher. The upgrade involved replacing the core equipment of the clinker cooler, optimizing the crushing and lubrication systems, adjusting the fan configuration, and implementing advanced technologies such as efficient clinker distribution and rapid cooling, independent hydraulic drive, double-layer labyrinth seals, and IMCC intelligent control, along with the installation of flow control valves to achieve on-demand distribution of cooling air. After the upgrade, the effective area of the grate bed increased from 138m2 to 169m2, the secondary air temperature reached ≥1 150℃, the tertiary air temperature reached ≥950℃, the heat recovery efficiency was ≥75%, and the temperature of the clinker leaving the grate cooler was reduced to ≤ ambient temperature + 65℃. The standard coal consumption per ton of clinker decreased by 2.68 kg/t.cl, and the power generation increased by 1~2kW·h/t.cl. The upgrade improved the operational stability of the system and energy utilization efficiency, achieving significant energy conservation and consumption reduction effects.
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Received: 26 May 2025
Published: 25 January 2026
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