《Tab.1 Unit type for the study》

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《燃煤机组SCR脱硝超低排放改造前后性能对比分析》

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The test results indicate that there is a certain correlation between the deviation of NOx concentration at the outlet and flue gas velocity distribution at the inlet and ammonia escape after ultra-low emission transformation，which is given in Fig.1.Furthermore，it can be argued that the larger the deviation of NOx concentration distribution at the outlet，the more likely the ammonia escape is to exceed the standard.Hence，it can be contented that the control of NOx concentration field at the outlet and flue gas velocity field at the inlet of the de NOx device can effectively solve the problem of the uneven flow field in the denitration system.