AS脱硫装置改造的技术选择

Technology Selection in Revamping the AS Desulfurization Unit

为实现SO2的达标排放,针对山西焦化脱硫装置现状,介绍了不同系统目前采用的AS脱硫工艺、JH-H脱硫工艺、真空碳酸盐脱硫工艺及其实际净化后煤气中的H2S含量;简述了高塔再生工艺、喷射再生工艺及脱硫再生一体塔工艺的流程及特点;估算了不同再生工艺的投资、占地面积、运行费用等,确定了AS脱硫装置改造选用以碳酸钠为碱源,采用JH-H湿式氧化脱硫工艺和脱硫再生一体塔的再生流程。改造实施后,将能满足现有标准的脱硫要求,有效降低现有AS脱硫装置操作成本,减少SO2排放,具有可观的经济效益和社会效益。

The desulfurization processes of AS, JH-H and vacuum carbonate were introduced in different system and the exact H2 S content after sulfur removal through the aforementioned three respective processes were also compared for revamping the desulfurization unit of the Shanxi Coking Group in order to reach the national SO2 emission standard. The high tower and ejecting regeneration processes and features, and also the desulfurization/regeneration 2-in-1 tower process were introduced in brief. After estimating the investment, covering areas and operation costs of the different regeneration processes, it was decided that for the AS desulfurization revamping project the sodium carbonate should be used as the alkaline source, the JH-H wet oxidation desulfurization process and the desulfurization/regeneration 2-in-1 tower process should be adopted. After the revamping execution, the current desulfurization requirement could be met, the operation cost of the AS desulfurization unit was effectively reduced, the SO2 emission was brought down, as a result, considerable social and economic benefits were achieved.