基于机械分流的等离子体点火调节技术仿真研究

Simulation Research on Plasma Ignition Regulation Technology based on Mechanical Shunt

等离子体燃烧器在点火过程中存在一个合适的风速及煤粉浓度最有利于点火,但是,随着运行工况的改变,一次风速及煤粉浓度均会发生改变,从而偏离最佳工况,导致点火变差。为了解决这个问题,文章提出了基于机械分流的等离子体点火调节技术,并且对某电厂330 MW机组进行了数值仿真研究,结果表明此技术可以很好地调整等离子体燃烧器各级筒的煤粉浓度,解决等离子体燃烧器点火调节性差的问题。

There is a suitable wind speed and pulverized coal concentration in the plasma combustion burner,which is most conducive to the ignition.However,with the change of operating conditions,the primary wind speed and pulverized coal concentration will change,thus departing from the optimal working condition and leading to the ignition deterioration.In order to solve this problem,the plasma ignition regulation technology based on mechanical shunt is proposed in this paper,and the numerical simulation study of 330 MW unit in a power plant is carried out.The results show that the technology can well adjust the pulverized coal concentration of all cylinders of plasma burner,and solve the problem of poor ignition regulation of plasma burner.