LSXPT-1型双向液体喷头的研究

RESEARCH ON LSXPT-1 TYPE DUAL-DIRECTION LIQUID SPRAY NOZZLE

在Φ1000 mm有机玻璃冷模试验装置上利用空气-水系统考察LSXPT-1型双向液体喷头的分布性能、喷出的液滴粒径、喷头入口压力、雾沫夹带等随液体流量变化的规律。结果表明：LSXPT-1型双向液体喷头的分布不均匀度系数在0．031～0．040之间，低于传统槽式液体分布器和缓冲沉降式液体分布器的分布不均匀度系数，分布性能优异；随着液体流量的增大，喷头入口压力增大，在液体流量为2．15～9．62 m3/h的范围内，喷头入口压力为0．04～0．66 MPa；喷出的液滴粒径在1975～2350μm之间，远高于当气速在3．0～4．0 m/s时因气液流动呈湍流状态液滴沉降所要求的液滴粒径（400～700μm）；该双向液体喷头即使在空塔气速高达4 m/s时，其雾沫夹带量仍不超过7％，可允许更高的操作气速上限，提高塔的处理能力。

The distribution performance,liquid drop size,the inlet pressure change and entrainment of the LSXPT-1 type dual direction liquid spray nozzle were studied in air-H2O system by synthetic glass tower （ID1 000 mm）device. The results indicate that its distribution non-uniformity coefficient are be-tween 0. 031-0. 040,40% lower than that of the conventional trough-type liquid distributor as well as the buffer sedimentation-type liquid distributor,exhibiting excellent distribution performance. With in-crease of liquid flow rate,the nozzle inlet pressure increases. The pressure can reach to 0. 04-0. 66 MPa and the liquid drop size from dual-direction liquid spray nozzle is between 1 975-2 350 μ m in the flow rate range of 2. 15-9. 62 m3/h,much higher than the size of 400-700 μm,required for the liquid droplet settling at gas-liquid flow in turbulent state when gas velocity between 3. 0-4. 0 m/s. Results show that the entrainment quantity is still less than 7% when the empty tower velocity is as high as 4 m/s. Thus the new nozzle can increase the tower’s upper limit of operating gas velocity and the processing ca-pacity.