燃煤火电机组无烟气旁路脱硫系统运行及改造方案研究

无烟气旁路脱硫系统需和主机同步启停,对脱硫系统的安全性、可靠性有了更高的要求。对烟气脱硫系统取消烟气旁路后的运行优化措施及改造方案进行研究,对烟气、吸收塔、吸收剂浆液制备、石膏脱水、事故排空、电气和热控等系统,提出了优化方案和改造原则;建议将脱硫系统纳入“主机”行列,提高脱硫设备运行可靠性,确保发电机组安全运行。

Study on Operation Optimization and Retrofit of Non-Bypass FGD System of Fossil Fuel Power Plants

Non-bypass FGD systems require the start-up and shut-down process synchronous with the primary turbines, which imposes higher demands for its security and reliability. In this paper the researches are mainly conducted on the operational optimization measures and improvement schemes after the removal of FGD bypass. Moreover, the optimization scheme and retrofit principle are proposed for the flue gas system, absorption tower, absorbent slurry preparation system, gypsum dewatering system, accident evacuation system, electrical system and thermal control system. Finally, it is suggested that the FGD system should be included as part of the “primary turbine” set, and the operation reliability of the desulfurization equipment should be improved to ensure the safe operation of the generating units.