Study on the distribution characteristics of low-temperature waste heat in the drying and absorption process of sulfuric acid production
硫酸生产干吸工序低温位余热分布特性研究

摘要

硫酸生产干吸工序中低温位余热具有能量密度高、分布集中、吸收效率显著的特征，是提高资源利用率和降低能耗的关键环节。其分布受烟气成分、酸浓分布、温度梯度及热回收塔工况影响，若未有效回收，不仅造成能源浪费，还会加剧设备腐蚀和系统负荷。通过分析分布规律，可揭示形成机制与传递路径，为余热回收利用提供理论支持。研究结果显示，低温位余热呈现阶段性与区域性耦合特征，合理利用可显著提升回收效率，促进清洁生产与节能减排。

Abstract

The low-temperature waste heat generated in the drying and absorption process of sulfuric acid production is characterized by high energy density, concentrated distribution, and significant conversion efficiency, making it a key factor in improving resource efficiency and reducing energy consumption. Its distribution is influenced by flue gas composition, acid concentration distribution, temperature gradients, and the operating status of the heat recovery tower. Without effective recovery, this waste heat not only leads to energy waste but also exacerbates equipment corrosion and system load. By analyzing the distribution patterns, the formation mechanisms and transfer pathways can be revealed, providing theoretical support for waste heat recovery. The research results show that the low-temperature waste heat exhibits coupled stage-specific and regional characteristics, and its rational utilization can significantly enhance recovery efficiency, thereby promoting clean production and energy conservation.