Experimental Investigation of Hydrodynamic Characteristic of a New Rotating Stream Tray

Abstract

The hydrodynamic characteristic of a new rotating stream tray (NRST) was investigated. The tests were carried out using an air–water/oxygen experimental system in a column with a diameter of 500 mm. The hydrodynamic parameters studied were dry plate pressure drop, wet plate pressure drop, weeping, entrainment, and Murphree liquid efficiency. The results showed that the NRST has excellent performance in terms of high operational flexibility. The pressure drop, weeping rate, and entrainment rate remained low even under a high-capacity operation. Correlations of pressure drop, weeping, and entrainment for the NRST were obtained by regression analysis. The results can provide some important theoretical guidance for the development of this type of trays.

Keywords

Rotating stream tray / Centrifugal separation / Hydrodynamics / Murphree liquid efficiency

References

[1] OlujićŽ Jödecke M, Shilkin A, et al. Equipment improvement trends in distillation. Chem Eng Process, 2009, 48(6): 1089-1104.

[2] Wang CR. Study on classification and application of the distillation. Min Metall, 2010, 19(2): 55-56 , 62 (in Chinese)

[3] Fair JR, Trutna WR, Seibert AF. A new, ultracapacity tray for distillation columns. Chem Eng Res Des, 1999, 77(7): 619-626.

[4] Vennavelli AN, Whiteley JR, Resetarits MR. New fraction jetting model for distillation sieve tray efficiency prediction. Ind Eng Chem Res, 2012, 51(35): 11458-11462.

[5] Zhang L, Liu X, Li H, et al. Hydrodynamic and mass transfer performances of a new SiC foam column tray. Chem Eng Technol, 2012, 35(12): 2075-2083.

[6] Brahem R, Royon-Lebeaud A, Legendre D, et al. Experimental hydrodynamic study of valve trays. Chem Eng Sci, 2013, 100: 23-32.

[7] Jiang B, Liu PF, Zhang LH, et al. Hydrodynamics and mass-transfer analysis of a distillation ripple tray by computational fluid dynamics simulation. Ind Eng Chem Res, 2013, 52(49): 17618-17626.

[8] Vanaki SM, Ganesan P, Mohammed HA. Numerical study of convective heat transfer of nanofluids: a review. Renew Sustain Energy Rev, 2016, 54: 1212-1239.

[9] Zhang LH, Li ZJ, Yang N, et al. Hydrodynamics and mass transfer performance of vapor-liquid flow of orthogonal wave tray column. J Taiwan Inst Chem Eng, 2016, 63: 6-16.

[10] Tan TE, Wang DH. The rotating stream tray. Bull Sci Technol, 1985, 1: 43-44 (in Chinese)

[11] Chen JM, Tan T. Experimental and theoretical investigation of gas flow field on a rotating stream tray. Chem Eng Commun, 1998, 168(1): 243-257.

[12] Shao XF, Wu ZB. Simulation and analysis on the two-phase flow fields in a rotating-stream-tray absorber by using computational fluid dynamics. Chin J Chem Eng, 2004, 12(2): 169-173.

[13] Chen JM, Tan T. Experimental studies of flow fields on rotating stream tray with laser Droppler anemometer. Chin J Chem Eng, 1996, 24: 59-64 (in Chinese)

[14] Sun WS, Wu ZB, Li Y, et al. Sodium-enhanced limestone wet FGD in rotating-stream tray scrubber. Chin J Environ Sci, 2002, 23(5): 105-108.

[15] Chen JM, Tan TE, Shi XN. Gas flow field above rotating stream tray. J Chem Eng Chin Univ, 1993, 3: 235-241.

[16] He SC, Yuan HX, Fu SC, et al. Numerical simulation of velocity and pressure in gas phase in rotating stream tray column. Chem Ind Eng Prog, 2011, 11: 2399-2403.

[17] Sun YQ, Chen JM, Song S. Industrial treatment of nitrogen oxide waste gas with rotating-stream-tray scrubber. Bull Sci Technol, 2007, 23(5): 751-754 (in Chinese)

[18] Shao XF, Wu ZB. Simulation and analysis on the two-phase flow fields in a rotating-stream-tray absorber by using computational fluid dynamics. Chin J Chem Eng, 2004, 12(2): 169-173.

[19] Li GW, Shi JF. Hydromechanics of rotative-stream tray. Environ Eng, 1996, 14: 28-34 (in Chinese)

[20] Yu R, Zhu HM. Impact of length of Baffle in structured packing on pressure drop and mass transfer. Chem Ind Eng, 2018, 35(4): 58-65.

[21] Wu JN, Gourdon Y, Xu EL. Design and performance tests of motor-driven rotary energy recovery device. Chem Ind Eng, 2018, 35(5): 42-48.

[22] Bennett DL, Agrawal R, Cook PJ. New pressure drop correlation for sieve tray distillation columns. AIChE J, 1983, 29(3): 434-442.

[23] Zarei T, Rahimi R, Zarei A, et al. Hydrodynamic characteristic of conical cap tray: experimental studies on dry and total pressure drop, weeping and entrainment. Chem Eng Process, 2013, 64: 17-23.

[24] Vitankar VS, Dhotre MT, Joshi JB. A low Reynolds number k-ε model for the prediction of flow pattern and pressure drop in bubble column reactors. Chem Eng Sci, 2002, 57(16): 3235-3250.

[25] Wijn EF. On the lower operating range of sieve and valve trays. Chem Eng J, 1998, 70(2): 143-155.

[26] Jaćimović BM. Entrainment effect on tray efficiency. Chem Eng Sci, 2000, 55(18): 3941-3949.

[27] Thomas WJ, Ogboja O. Hydraulic studies in sieve tray columns. Ind Eng Chem Proc Des Dev, 1978, 17(4): 429-443.

[28] Kister HZ, Haas JR. Entrainment from sieve trays in the froth regime. Ind Eng Chem Res, 1988, 27(12): 2331-2341.

[29] Jaćimović BM, Genić SB. Tray efficiency versus stripping factor. Ind Eng Chem Res, 2011, 50(12): 7445-7451.

[30] Luo N, Qian F, Ye ZC, et al. Estimation of mass-transfer efficiency for industrial distillation columns. Ind Eng Chem Res, 2012, 51(7): 3023-3031.

[31] Wang HH, Niu XW, Li CL, et al. Combined trapezoid spray tray (CTST): a novel tray with high separation efficiency and operation flexibility. Chem Eng Process, 2017, 112: 38-46.

[32] Li QS, Zhang MX, Tang XF, et al. Flow-guided sieve-valve tray (FGS-VT): a novel tray with improved efficiency and hydrodynamics. Chem Eng Res Des, 2013, 91(6): 970-976.