基于陶瓷行业脱硫塔管束除雾器流速调控装置的设计研究

Design and Research of Flow Rate Control Device of Tube Bundle Demister Based on Ceramic Industry Desulfurization Tower

目的针对陶瓷行业烟气“超净排放”须达到的标准(颗粒物浓度小于5 mg/Nm3)要求,创新设计管束除雾器流速调控装置结构。方法在脱硫塔管束除雾器流速调控装置的出口末端均匀布置多组调节阀门,根据实际工况烟气量通过调节延伸在塔外的调节杆控制阀门启闭的数量,进而控制通过管束除雾器的总烟气量,实现单筒管束除雾器的筒内流速在设计范围内。结果工作时,整列实现启闭,单列调控可控制最大烟气量达5.7×104 m3/h。当脱硫塔控制进口颗粒物质量浓度小于50 mg/m3时,管束除雾器内筒烟气流速小于5 m/s,颗粒物质量浓度为13~15 mg/m3。当内筒烟气流速处于5~7 m/s时,颗粒物质量浓度为7~10 mg/m3。结论该流速调节装置的使用能确保管束除雾器单筒内的流速不低于设计值,可避免因喷雾塔开停导致工况烟气量波动而影响除雾器的效率。

According to the“ultra-clean emission”standard of flue gas in ceramic industry(the concentration of particulate matter is less than 5 mg/Nm3),innovatively design the structure of flow rate control device of tube bundle demister.Several sets of regulating valves are uniformly arranged at the outlet of the flow rate control device of tube bundle demister in desulfurization tower,according to the actual working condition,the quantity of the valve opening and closing is controlled by adjusting the adjusting rod extending outside the tower,and then the total quantity of the flue gas passing through the tube bundle demister is controlled,so that the flow rate in the tube of the single tube bundle demister is within the design range.During operation,the whole train can be opened and closed,and the single train can control the maximum flue gas volume up to 5.7×104 m3/h.When the mass concentration of particulate matter at the inlet of the desulfurization tower is less than 50 mg/m3,the flue gas flow rate in the inner tube of the tube bundle demister is less than 5 m/s,and the mass concentration of particulate matter is 13~15 mg/m3.When the flue gas flow rate in the inner tube is 5~7 m/s,the mass concentration of particulate matter is 7~10 mg/m3.The flow rate control device can ensure the flow rate in the tube bundle demister not lower than the design value,and can avoid the influence of the efficiency of the demister caused by the fluctuation of the flue gas volume in the working condition of the spray tower.