Influence of multi-point injection on coverage fraction of coal gas during its reburning process

Taking one 130 t/h boiler as prototypes,established cold state experimental bench.To better reburn the coal gas,test the influence of multi-point injection on coverage fraction of upflow in gasifier.Numerically simulate this process with standard turbulence model.The results show that,while the injection points are eight,the coverage fraction is the highest.Under four conditions,when the flow inclination of four corners all is 41.17°and reburning flows from the centrals of four walls is 84.57°,the overfire air can be greatly covered.