气体通过内置不同液体分布器吸收塔的压降实验研究

压降是吸收塔设计及操作的重要参数,吸收塔内置不同结构的液体分布器时产生压降情况不同。为此,搭建1.2 m吸收塔实验平台,基于不同液体分布器,针对气速与喷淋密度对整塔及局部内件压降的影响进行实验研究。结果表明,吸收塔中分布器、填料、集液器等部件压降都较小,绝大部分压降集中在除沫器部分;吸收塔内置管式和槽式分布器时,整塔压降随喷淋密度增大有下降的趋势,整塔压降随气速增大而变大。在1 326 m~3/h和1 329 m~3/h的气速下,整塔压降峰值分别为0.45 k Pa和0.445 k Pa。吸收塔内置新型管槽式分布器,整塔压降随喷淋密度增大基本上保持不变,整塔压降同样随气速的增大而变大,在1 350 m~3/h气速下整塔压降峰值为0.375 k Pa,相比内置管式和槽式分布器有较大的优势,且在不同喷淋密度下表现更加平稳。经计算,u=1 362 m~3/h时,吸收塔内置新型管槽式液体分布器相对于内置管式和槽式分布器的整塔压降分别降低16%和12%。

Experimental investigation of gas pressure drop of absorption tower with different types of liquid distributors

The pressure drop is an important application performance of absorption tower and various atmospheric pressure reduction devices, the pressure drop is different when different structure liquid separator is built in absorption tower. The experimental platform was built in this project on the basis of different liquid separators and carried out experimental researches about the influence of gas velocity and sprinkle density on the whole tower and local inner part. The test results show that, in the absorption tower, the pressure drop of distributor, filler, liquid container and other components is small, most of the pressure drop is concentrated in the part of the foam removing device; when ladder and slot separator are built in absorption tower, the whole tower pressure drop shows downward trend with the increase of sprinkle density and becomes larger with the increase of gas velocity, the whole tower pressure drop peak is 0.45kPa and 0.445kPa respectively at 1326 m3/h and 1329 m3/h gas velocity; when new ladder-slot separator is built in absorption tower, the whole tower pressure drop is basically unchanged with the increase of sprinkle density, and it also becomes larger with the increase of gas velocity, the whole tower pressure drop is 0.375 kPa at 1350 kPa gas velocity, compares to the ladder and slot separator has a larger advantage and the performance is more stable under different sprinkle density. Through calculation, when u=1362 m3/h, the absorption tower has built-in new ladder-slot liquid distributor compares with built-in ladder and slot separator, the whole tower pressure drop decreases by 16% and 12% respectively.