Study of flow through a bowl mill model
Bowl Mills are used in Thermal Power plants for pulverizing the raw coal, while drying, to the required fineness and achieve the desired combustion efficiency in the boiler. The Indian coals contain high ash content (some times as high as 60%) and as such the primary air has to handle media of different density namely the coal and the quartz. In this context, the distribution of air in the mill plays a significant role in the lifting of particles from the mill. The wear on the rotating components is increased through repetitive grinding because of improper distribution of air within the mill. Reduction of wear and enhancement of life of mill internals including the rotating components is a continuing goal and few more studies have been carried out in this direction. One such study is the replacement of rotating vane wheel and deflector in the separator body with an air guide ring and air diversion plate. Model studies have been carried out by traversing a five hole prove at different locations within the mill to study the distribution of flow as a result of this modification. The variation of absolute velocity and the associated flow direction has been calculated to describe the flow structure within the mill. The results are presented in non dimensional form to draw suitable conclusions. The present study indicated the possibility of improvement in the distribution of flow within the mill with increased magnitude of velocity at different locations.
- Research Organization:
- Bharat Heavy Electricals Ltd. (IN)
- OSTI ID:
- 20013553
- Resource Relation:
- Conference: 1998 International Joint Power Generation Conference, Baltimore, MD (US), 08/23/1998--08/26/1998; Other Information: PBD: 1998; Related Information: In: Proceedings of the 1998 international joint power generation conference (FACT-Vol.22). Volume 1: Fuels and combustion technologies; Gas turbines; Environmental engineering; Nuclear engineering, by Gupta, A.; Natole, R.; Sanyal, A.; Veilleux, J. [eds.], 921 pages.
- Country of Publication:
- United States
- Language:
- English
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