Effect of Blade Spaces on the Performance of a Five Stage Blades Louver Coal Concentrator

The horizontal bias combustion (HBC) is a combustion technology that has achieved satisfactory comprehensive effects with stability combustion, high combustion efficiency, resistance to slagging and high temperature corrosion and low NO_x emission. As the key part of HBC technology, the efficiency of coal combustion in the pulverized fuel boiler is affected by the performance of louver concentrator. A study of the effect of blade spaces in five stages on the performance of the louver concentrator was conducted in a louver concentrator test system. The experimental results show that the front blades have great influence on concentration coefficient and the middle and the rear blades have great influence on resistance coefficient. When the ratio of the space of blades is 1:1:1:3, the maximum concentration coefficient and average resistance coefficient are achieved and it can satisfy the concentrators with high concentrated level. And when ratio of the space of blades is 1:2.25:1:1, it can satisfy the concentrators with low resistance. These tests provide a theoretical basis for the design of louver concentrator and its engineering application.