Abstract
The pressure losses of the hot primary-air pipe system have a great influence on the economic operation of a pulverizing system. To balance the flow resistance for different branches, Fluent was applied to simulate flow dynamics and pressure drop for a hot primary-air pipe system, and two improvement schemes were proposed. Numerical simulation reveals that for the original configuration, the flow losses of each branch are quite different, and the large resistance of some branches is mainly caused by pipe tees. After improvement, the flow regime has been significantly polished, and the total pressure drop of different branches is greatly reduced. Compared with the original configuration, the total pressure loss of branch B and branch D in case 2 is reduced by 65% and 53%, respectively, then an approximately equal pressure drop of each branch is achieved after structure improvement.
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