Experimental Research On The Diffusion Characteristics Of The Collisional Rich-lean Gas-solid Multiphase Jet Flow And Slagging Prevention Technology

The gas-solid multiphase flow was existed in normal ways, it was important to get the results of the characteristics accurately, which related to the system works safely and ecomically in the power plant. A novel method of investigation the diffusion characteristics of the gas-solid multiphase jet flow was presented based on optics wave theory in this work. The experiments were conducted to determine the particle concentrations distribution and its size in the gas-solid jet flow from the rich/lean fuel burner with collision block.In this work, the author carrys through some research about the particle dispersion in gas-solid two-phase fuel rich/lean burner flow on the multiphase flow test-bed in Zhejiang University. The content of this test mostly touch upon three aspects: first, do some modeling calculation basing on the modeling ratio and define the test conditions.We use talcum powder with the particle diameter of 16μm in cold modeling tosimulation the coal particle in real boil. Second, do single-phase flow test , get different velocity distribution of rich/lean flow both in and out of the ejector nozzle in the condition of different height of collision block. We analysis the influences of the different height of collision block to the difference between the velocity of the rich side and that of lean side , and we believe that the difference in the rational range because of the exist of the curve plate. Third, a novel fiber probe is employed to investigate particle dispersion in gas-solid two-phase fuel rich/lean burner flow. By means of changing the height of the collision block basing on the fixed density of feeding powder and changing the density of feeding powder basing on the fixed height of the collision block , compare the different density distribution of the flow and discuss the influence to density by the height of collision block and density of feeding powder. We consider that the influence of the height of collision block is the most important and we can get different rich/lean ratio by adjusting the height of the collision block. At last we give...