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| Optimization of Material Balance and Water Balance Process Flow for Cement Industry Kiln Ash-gypsum Wet Desulfurization System |
1 Tianshan Materials Co., Ltd. , Shanghai 200126, China;
2 Tianjin Cement Industry Design & Research Institute Co., Ltd. , Tianjin 300400, China
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Abstract Considering the increasingly strict national standards for air pollutant emissions, many cement plants adopt kiln ash-gypsum wet desulfurization systems to achieve efficient desulfurization. However, the conventional kiln ash-gypsum wet desulfurization system has problems such as complex material balance and water balance process flow, high investment and operating costs, and large footprint. An optimization scheme based on the conventional kiln ash-gypsum wet desulfurization process is proposed, which simplifies the desulfurization process by eliminating the first and second stage gypsum dehydration equipment and corresponding supporting facilities. The accident slurry is directly transported to the grate cooler, achieving the simplification of material balance and water balance process flow. In addition, in this optimization plan, the accident slurry tank has added the function of spraying slurry into the grate cooler at the kiln head. The slurry flow rate can be monitored by a flowmeter to adjust the material balance. Taking a domestic 5 000 t/d clinker production line as an example, this optimization plan reduces the one-time investment by about 0.9 million yuan and can save operating costs of 0.173 5 million yuan per year. The economic benefits are significant, and the impact on kiln head exhaust gas and clinker quality is relatively small.
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Received: 04 September 2024
Published: 25 January 2025
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