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A novel design for a gas-inducing impeller at the lowest critical speed
- Source :
- Chemical Engineering Research and Design. 87:1069-1074
- Publication Year :
- 2009
- Publisher :
- Elsevier BV, 2009.
-
Abstract
- To disperse the unreacted overhead gas phase into the liquid in an agitated reactor without gas outlet, a gas-inducing impeller is usually employed. To determine the lowest critical rotating speed, the gas-induction mechanism was reconsidered by constituting a mechanical energy conservation equation between the gas inlet orifice in the gas phase and the gas outlet orifice in the liquid phase under a certain rotational speed. According to this model, the critical speed of the gas-inducing impeller could be basically determined by the submersion depth and the radial position of the gas outlet, and a novel design was proposed by introduction of six short pipes stretched radially from the axis of the impeller. The final design of the gas-inducing impeller was obtained by an optimal combination of the gas-inducing pipes, the blades of the impeller and the baffle dimension.
Details
- ISSN :
- 02638762
- Volume :
- 87
- Database :
- OpenAIRE
- Journal :
- Chemical Engineering Research and Design
- Accession number :
- edsair.doi...........1bd327149e2853a56fb6c3752ee2d8ac