Study on Pressure Drop Characteristics of Single Gas Phase in Venturi Scrubbers
The Venturi scrubber has a simple structure,low cost,and high dust removal efficiency.It is a reliable device for the separation and purification of crude gas produced by underground coal gasification.In order to optimize the structure and process of the Venturi scrubber and reduce energy usage,the single gas phase pressure drop characteristics of the Venturi scrubber were studied by combining experiments and computational fluid dynamics.The total pressure drop in the Venturi scrubber was measured experimentally at different gas volume flow rates and throat lengths.Based on the validated numerical model,the convergent,throat,and divergent pressure drops were determined.The research results show that the single gas phase pressure drop in the Venturi scrubber increases exponentially with increasing gas volume flow rate and linearly with increasing throat length.Combined with the experimental and simulation results,the formula for calculating the single gas phase pressure drop of the Venturi scrubber was obtained based on the theoretical analysis and fitting.It provides a reference for calculating the pressure drop of a single gas phase in a Venturi scrubber in the industry.
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