凝汽器胶球清洗系统性能分析及优化

Performance Analysis and Optimization of Condenser Rubber Ball Cleaning

凝汽器冷却管束发生结垢或堵塞时,使传热效率降低,端差增大,汽轮机背压升高,机组效率降低。在传统凝汽器胶球清洗系统基础上,设计了一种新型凝汽器胶球清洗系统,解决了目前电厂凝汽器冷却管束外围无法清洗的问题。通过使用FLUENT软件,以某电厂600MW机组凝汽器为研究对象,针对凝汽器管板A区上边缘区域进行模拟。模拟结果表明:凝汽器进口水室内存在涡流,涡流会改变胶球在凝汽器水室内的运动轨迹。通过对14种投球方式进行数值模拟,找到最优方案:射流速度控制在1.3m/s^1.7m/s之间,送球速度控制在1.6m/s^2.2m/s之间,流经A区域的胶球数量比较均匀、数量较多,且清洗面积比较大。

When condenser Bundles are fouled or clogged, it will destruct the cleanliness of the steam turbine. The heat transfer efficiency is reduced. End difference and back pressure steam turbine will increase. The unit efficiency will reduce. Based on the traditional condenser rubber ball cleaning system, a new condenser rubber ball cleaning system and method for a given area is proposed. This paper takes 600MW condenser unit as the research object, by using the FLUENT software, right on the edge of the condenser tube plate A cleaning area. Using turbulence model and porous media model to simulate water flow condenser inlet chamber chart; using the discrete phase model to simulate rubber bali imported water in the condenser chamber trajectories. Simulation results show that： Condenser import water indoor exist eddy currents ,which will change rubber ball trajectory. Through the numerical simulation of 14 kinds of way to throw a ball and find the optimal solution ： jet velocity control between the 1.3m/s - 1.7m/s and send the ball speed control between the 1.6m/s - 2.2m/s, flows through a region of rubber ball number is relatively uniform, a large number, and cleaning area is relatively large.