问题描述：
英语翻译
本设计是单管程固定管板式换热器,是目前应用最为广泛的换热器.作为一种通用的传热工艺设备,换热器在动力、化工、是由、冶金、核能、食品等各工业部门有着广泛的应用.尤其在炼油厂和化工厂中,换热器更是重要,其投资费用站总的工艺设备费用的三分之一多.固定管板式换热器的结构特点是在壳体中设置有管束,管束两端用焊接或胀接的方法将管子固定在管板上,两端管板直接和壳体焊接在一起,壳程的进出口管直接焊在壳体上,管板外圆周和封头法兰用螺栓紧固,管程的进出口管直接和封头焊在一起,管束内根据换热管的长度设置了若干块折流板.因管板上的应力较多,且内外温度有一定的差值,因此,对管板强度的校核是一个重点,也是一个难点
固定管板式换热器结构简单,制造成本低,管程清洗方便,管程可以分成多程,壳程也可以分成双程,规格范围广,故在工程上广泛应用.壳程清洗困难,对于较脏或有腐蚀性的介质不宜采用.当膨胀之差较大时,可在壳体上设置膨胀节,以减少因管、壳程温差而产生的热应力.
问题解答：
我来补答
The design process is a single tube fixed tube heat exchanger, is currently the most widely used heat exchanger. As a general heat transfer process equipment, heat exchangers in the power, chemical industry, is, metallurgy, nuclear energy, food and other industries have a wide range of applications. Especially in refineries and chemical plants, the heat exchanger is more important points of their total technology investment costs, equipment costs more than a third. Fixed tube sheet heat exchanger structure is characterized by a bundle in the shell set, bundle ends welded or expanded joint approach to the tube fixed in the tube sheet, both ends of the tube plate welded together directly and shell, shell Direct import and export of pipe welded to the shell, tube sheet and the outer periphery of flange bolt head, the import and export control process and the head tubes welded together directly, the length of heat exchange tubes within the set according to a number of pieces baffle. More stress due to tube sheet, and a certain temperature difference between inside and outside, so check on the tube sheet is a key strength, but also a difficult
Fixed tube heat exchanger simple structure, low cost, easy to clean pipe process, management process can be divided into multiple, the shell can be divided into two-way, a wide range of specifications, it is widely used in engineering. Shell difficult to clean, dirty or corrosive for the media should not be used. When the expansion is large the difference can be set on the expansion joints in the shell in order to reduce the tube, the shell temperature and thermal stress.
再问： 能不能在简洁一些！
