旋转式和静态式填料塔脱碳性能实验研究

Experimental study on CO_2 absorption in rotary and static packed towers

针对电厂烟道气CO_2吸收设备效率低的缺陷,从气液吸收平衡机理出发,提出旋转吸收填料塔和静态折流板式吸收填料塔,并自行搭建实验台进行对比实验研究,采用体积组成为20%MDEA+10%TETA+70%H_2O的混合胺液为吸收剂,以V(CO_2):V(N_2)=3:17的混合气为模拟烟气,在混合胺液温度40℃,模拟烟气流量0.5m^3/h的条件下,研究混合胺液流量、液体分布器转速及填料高度对模拟烟气中CO_2吸收效率的影响。结果表明,静态折流板式吸收填料塔具有更高的CO_2吸收效率,实验所得最高值达88.7%。

Aiming at the defect of low efficiency in equipments for CO~ absorption from flue gas of power plant, a rotating absorption packed tower and a static baffle plate absorption packing tower were proposed based on the principle of vapor-liquid absorption equilibrium, and an experimental bench was build to carry out the comparative experiments. The mixed amine solution with the volumetric composition of 20%MDEA＋10%TETA＋70%H20 was used as absorbent, and the simulated flue gas had a CO2/N2 volume ratio of 3：17. Under the absortive solution temperature of 40℃ and the gas flow rate of 0.5 m3/h, the effects of mixed amine solution flow rate, liquid distributor speed and packing height on the efficiency of CO2 absorption from the simulated flue gas were investigated. The results show that the static baffle plate absorption packing tower has a higher CO2 absorption efficiency, and the highest value reached 88.2%.