论文部分内容阅读
在现代蒸汽锅炉热力系统中,一般采用屏式过热器,这种受热面布置复杂,各片屏之间和同屏各管之间的平均及局部吸热量都有较大的不均匀性,而且屏布置在高烟温区中,这就使屏式过热器往往成为大容量锅炉运行中主要的事故环节。设计屏式过热器时,对其水力和热力偏差的准确计算往往重视不够,曾经有过错误的看法,认为在高压下各管蒸汽分配不均程度大为下降,因而其水力系统布置不起重要的作用,但没有考虑到高参
In the modern steam boiler thermal system, the general use of screen superheater, the heated surface layout is complicated, between the various screen and between the screen with the average and local heat absorption have greater non-uniformity, And the screen is placed in the high temperature zone, which makes the screen superheater often become the main part of the operation of large-capacity boiler accident. When designing a screen-type superheater, accurate calculation of hydraulic and thermal deviations is often inadequate. There has been a fallacious view that the distribution of steam in each pipe is greatly reduced under high pressure, and thus the hydraulic system arrangement is not important The role, but did not take into account the high reference