低质量流速垂直管屏技术的原理与应用分析

1前言大容量锅炉的水冷壁通常采用多回路管屏或螺旋管圈以保证其具有较低的壁面温度和较小的工质温度偏差。而采用这两种管屏在解决以上问题的同时也带来了无法克服的缺陷:支吊复杂,管内流动阻力较大,制造和运行成本增加。与之相比较,垂直管屏结构简单,管内流动阻力较小,变压运

Analysis of Working Principle and Application of Low Mass Flow-speed Vertical Tube-platen Technology

The key issues of low mass flow-speed vertical tube-platen technology lies in its inner threaded Benson tubes. The authors have analyzed the basic principle of Benson tubes and explored the application of the above-mentioned technology. The low mass flow-speed vertical tube platen features natural circulation characteristics, guaranteeing a safe operation of boilers while simultaneously meeting comparatively low mass flow-speed requirements. Hence, the low mass flow-speed vertical tube platen technology has its own technical edge, especially for forced circulation pulverized coal-fired boilers and supercritical circulating fluidized bed ones which must adopt low mass flow-speed vertical tubes. The inner threaded tubes can reduce steam temperature deviation and flow resistance in water-cooled walls and secure a safer operation of the latter.