Chowdhury, R and Chakravarty, Mithiles and Bhattacharya, P (1992) Prediction of venturi scrubber efficiency used in an updraft gasifier cleaning train. International Journal of Energy Research, 16 (8). pp. 731-741. ISSN 0363-907X

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Abstract

The performance of a venturi scrubber in the removal of tar from gas in updraft gasification has been studied. The gasifier has been operated with a husk feed rate of 1.6 x 10(-4) kg/s. The venturi scrubber has been operated at a superficial gas velocity of 56/4 m/s at the throat A wide variety of scrubbing liquids having surface tensions ranging from 0.026 to 0.072 N/m have been used. The Q(g)/Q(l)has been varied in the range of 1000-8000. The tar separation efficiency eta has been found to vary from 51 to 98.5%. A mathematical model, assuming steady-state operation, has been developed considering very high pseudosolubility of tar in the scrubbing liquids. The predicted values of eta have been compared with experimental results. The model satisfactorily explains the tar removal efficiency of the venturi for Q(g)/Q(l) values ranging from 4000 to 8000 for all scrubbing liquids. The following correlation has been developed for predicting venturi scrubber efficiency: eta = 0.78(N(Re))0.04(N(We))0.57(Q(g)/Q(l))-0.43 for 1.6 x 10(4) less-than-or-equal-to N(Re) less-than-or-equal-to 8.9 x 10(5), 5.6 x 10(5) less-than-or-equal-to N(We) less-than-or-equal-to 1.42 x 10(6), and 4000 less-than-or-equal-to Q(g)/Q(l) less-than-or-equal-to 8000.

Item Type:	Article
Uncontrolled Keywords:	Venturi scrubber;Tar removal;Updraft rice husk gasification;Mathematical modelling
Subjects:	Environment and Pollution
Divisions:	UNSPECIFIED
Depositing User:	Bidhan Chaudhuri
Date Deposited:	27 Nov 2013 11:45
Last Modified:	28 Feb 2016 16:15
URI:	http://cgcri.csircentral.net/id/eprint/2323

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