Double tube sheet heat exchanger

Haha, it is a heat exchanger with two tube sheets between the tube and shell sides. In order to avoid medium contact between the tube and shell sides

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Thank you for your hard work on the 3rd floor. It would be great if the textures can be improved.

http://www.jxcad.com.cn/read-htm-tid-112686.html The design and manufacture of double tube plate heat exchangers hope it will be helpful to the original poster!

If the double tube plate heat exchanger is a straight tube, it is a fixed tube plate heat exchanger with an inner tube plate added, or it can also be made into a U-shaped tube double tube plate heat exchanger. The spacing between the two tube sheets varies according to the design purpose, ranging from 500 to 25 mm. The spacing between the tube sheets is large, and some processes require the addition of medium. ； The small distance between the two tube sheets is mostly a cavity. Here, we mainly introduce the double tube sheet heat exchanger with a cavity between the two tube sheets. Under some specific working conditions, mixing caused by even slight leakage between the two media is not allowed. In this case, a double-layer tubesheet heat exchanger must be used. This double-tubesheet heat exchanger has a cavity between the two tubesheets. In the polysilicon chemical industry, 25mm spacing is common. The heat exchange tubes pass through two layers of tube sheets, the inner tube sheet and the shell are connected by welding, and the outer tube sheet and the tube box are connected. The middle cavity is equipped with an exhaust pipe. The heat exchange tube and the inner tube plate are combined in the form of expansion joints, and the outer tube plate and the tube are welded. If there is leakage of media, it can be checked through the cavity. If there is no danger of mixing of the two fluids, it can be drained in time and measures can be taken to ensure safety. In the manufacturing process, the expansion joint of the inner tube plate and the tube is the key, and not many domestic companies can do this well. The double-tube plate heat exchanger has a tube plate at the end of the heat exchange tube, called the outer tube plate, which also serves as the equipment flange and is connected to the heat exchange tube and the tube box flange respectively. There is another tube plate relatively close to the end of the heat exchange tube, called the inner tube plate, which is connected to the heat exchange tube and the shell side respectively. There is a certain distance between the outer tube sheet and the inner tube sheet, and they are connected with Harlequin nipples to form an isolation cavity that does not bear pressure. The characteristic of the double tube sheet structure is that the two tube sheets completely separate the media on the tube side and the shell side. There are two symmetrical drainage holes on the back of each outer tube sheet that are connected to the isolation cavity. There are 12 tie rod screw holes on the back of the inner tube plate 2 (the welding surface with the shell). The outer tube plate 1 and the inner tube plate 1 form the first group of double tube plates, and the outer tube plate 2 and the inner tube plate 2 form the second group of double tube plates. In addition, there is a lot of information on double tube plates in the forum, see the link below http://bbs.hcbbs.com/search.php?searchid=4885&orderby=lastpost&ascdesc=desc&searchsubmit=yes&page=1 This post was last edited by vivo1314 on 2009-4-14 00:11 ]