摘要
为了降低气流进入SCR反应器的速度分布偏差,优化脱硝系统内部流场,采用数值模拟的方法,以国内某600 MW锅炉脱硝系统为原型,按照1:1的尺寸构造数值模拟几何模型,通过响应面法制定多种不同方案来进行模拟研究。模拟结果表明:脱硝系统不加装导流装置时,第一层催化剂上方1m处气流速度分布偏差为52.21%;当加装导流装置并采用最优方案后这一指标降低为10.6%,且导流板D对于气流均匀性的影响最为明显。最后通过搭建1:20实验台模型进行验证实验,实验结果与模拟结果一致,对于脱硝系统导流装置的布置安装有一定的指导意义。
In order to reduce the velocity distribution deviation of the air flow into the SCR reactor and optimize the internal flow field of the denitrification system, the numerical simulation method is used. A numerical simulation model is constructed based on the size of a 600MW boiler in China, and a number of different schemes are made by the response surface method to carry out the simulation study by the response surface method. The simulation results show that when the denitration system does not install the diversion device, the velocity distribution deviation of the air flow velocity above the first layer of catalyst is 52.21%. When the guide device is installed and the optimal scheme is adopted, the index is reduced to 10.6%, and the influence of the guide plate D on the airflow uniformity is the most obvious. Finally, the experimental results are consistent with the simulation results by setting up the 1： 20 experimental platform model. It is of certain guiding significance for the arrangement and installation of the diversion device of the denitrification system.
出处
《节能》
2018年第10期67-72,共6页
Energy Conservation
关键词
响应面
流场优化
数值模拟
SCR反应器
response surface
flow field optimization
numerical simulation
SCR reactor
