Taking the fluid flow uniformity and pressure drop as the evaluation indexes

the real 3D solid numerical model is adopted to investigate the influence of geometrical structure parameters of the tapered flow distributor on flow uniformity and flow resistance.The corresponding relation charts of flow status in entrance region of shell side and key structure parameters L

θ

and H are obtained

where L is the distance between the inner surface of jacket and the exine of internal liner barrel

θ is the inclination angle of inlet section where fluid enter the draft-tube

and H is the distance from the high end of the internal liner barrel to the tube plate. By adjusting the above structure parameters in proper ranges

the flow uniformity at the entrance section of the shell side can be improved and the pressure drop in the shell side is decreased effectively.The ranges of L

θ

and H values recommended are:L=50-70 mm

θ=7°-12.5°

H=50-100 mm for the optimum design.