焦炉烟气余热回收发电技术分析

煤焦化行业是高污染、高排放的行业,所排放的焦炉烟气温度一般大于300℃,既浪费能源又污染环境,是急需解决的问题。针对目前焦化企业焦炉烟气余热资源无序排放的现状,提出了采用先进的热管技术回收焦炉烟气热能及使用螺杆动力机取代传统汽轮发电机技术的新方案,分析了实施改造前后的能源消耗和经济效益。结果表明,焦炭生产能力为90万t/a的焦化厂,将烟气温度由300℃降至150℃,可回收能量折标准煤量为7598 t/a,由机组发电产生的经济效益为127.60万元/a。因此采取先进可靠的焦炉烟气余热发电技术是焦化行业实现节能减排和可持续发展的较好选择。 Coking is a high pollution and emission industry. The temperature of flue gas is over 300 ℃. It pollutes the environment and wastes energy. The emission of coking flue gas is in a disordered state. To resolve this problem,adopt advanced heat pipe technology recycle the coking flue gas heat energy,replace the traditional steam turbine generator with a screw power machine. Analyze the energy consumption and economic benefits before and after renovation. The results show that,the recovery energy amounts to 7598 tons of coal equivalent per year in a 9 × 105 tons per year coking plant when the coking flue gas temperature decreases from 300 ℃ to 150 ℃. The economic benefits of power generation is about 1. 276 × 106 yuan per year. So advanced and reliable technology can reduce emission and realize sustainable development