大屁股国产在线观看_激情欧美日韩国产_国产在线观看不卡av天堂_城中村200元高素质太划算了_久久国产精品五月天_亚洲无码黄色电影_床震18无遮挡网站大全_欧美va免费高清在线观看_亚洲第一天堂中文字幕av_亚洲精品乱码一区二区三区

A kind of shell-and-tube heat exchanger, which belongs to petrochemical equipment, consists of main parts such as tube box, shell and tube bundle. It is named after its heat exchange tube is U-shaped. The U-shaped tube heat exchanger has only one tube plate, and both ends of the tube are fixed on the same tube plate. The characteristic of this type of heat exchanger is that the tube bundle can be expanded and contracted freely, no thermal stress will be generated due to the temperature difference between the tube and the shell, and the heat compensation performance is good; the tube pass is a double pass, the process is longer, the flow rate is higher, and the heat transfer performance is better. ; Strong pressure-bearing capacity; the tube bundle can be drawn out from the shell, which is convenient for maintenance and cleaning, and has a simple structure and low cost.