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中国钢铁行业面临着资源能源短缺、市场盈利下降和生态环境制约三个方面的压力与挑战,在低碳循环经济成为当前社会发展主趋势的情况下,钢铁企业需要向低碳、绿色生产的方向转型升级。以京唐钢铁公司2015年上半年的生产调研为基础,计算京唐钢铁公司生产过程的能耗、CO_2排放情况,并对钢铁生产过程能量流运行、废弃物处理与能源转换情况进行分析,为其他钢铁企业减少CO_2排放、节约能源、保护环境提供一个参照。研究表明,京唐钢铁公司吨钢综合能耗为604.5 kg,吨钢CO_2排放为2.165 t,与产品结构相类似的宝钢和武钢相比,能耗水平位于行业先进水平;基于钢铁生产的能量流分析表明,京唐钢铁公司通过采用干熄焦发电、煤气干法除尘、TRT余压发电等先进技术,实现吨钢余热余能回收136.26 kg,余热余能回收率为48.31%,高出全国平均水平10.89%;京唐钢铁公司基于循环理念,建立高效的煤气-电能转换中心和余热蒸汽回收利用中心,基本实现了煤气资源、固体废弃物资源、水资源的循环利用与废水零排放,生产过程中SO_2、NO_2、粉尘的全面达标排放。
China’s steel industry faces the pressures and challenges of resource and energy shortages, market profitability decline, and ecological environmental constraints. Under the circumstances that low-carbon circular economy has become the main trend of current social development, steel companies need to move toward low-carbon and green production. Upgrade. Based on the production survey conducted by Jingtang Steel Co. in the first half of 2015, the energy consumption and CO 2 emissions of the production process of Jingtang Steel were calculated, and the energy flow operation, waste treatment, and energy conversion of the steel production process were analyzed. Other steel companies provide a reference for reducing CO 2 emissions, saving energy, and protecting the environment. The research shows that the comprehensive energy consumption per ton of steel in Jingtang Steel is 604.5 kg, and the CO_2 emission per ton of steel is 2.165 t. Compared with Baosteel and Wuhan Steel, which have similar product structure, the energy consumption level is in the advanced level in the industry; the energy flow based on steel production The analysis shows that Jingtang Iron & Steel Co., Ltd. adopts advanced technologies such as dry quenching power generation, gas dry dust removal and TRT residual pressure power generation to achieve 136.26 kg of waste heat residual energy per ton of steel, and the recovery rate of residual heat energy is 48.31%, which is higher than the national average. Level 10.89%; Jingtang Iron & Steel Co., Ltd. established a highly efficient gas-to-electricity conversion center and a waste heat recovery and utilization center based on the concept of recycling, basically achieving the recycling of coal gas resources, solid waste resources, water resources, and zero discharge of wastewater. Full compliance with standard SO_2, NO_2, and dust emissions.