Support rings and installation issues for chemical process towers?
Thread Content
The tower was designed by a certain design institute, while the internal components of the tower were designed by other entities. The construction drawings that have been sent over do not include any drawings for these internal components (special supplies such as trays, support rings, liquid distribution plates, etc.). The tower is currently being manufactured in the factory. The issue is that the design institute states that the internal components should be installed only after the tower crane is in place, so as to ensure that the trays are installed at the correct level. What are everyone’s thoughts on this? Is the installation difficult like this?
At our company, the tray is installed only after the tower structure has been assembled; it’s quite challenging. Moreover, during the hot summer days, there isn’t much time for installation during the day, so overtime work is required at night. However, I believe that installing the tray after the tower structure has been assembled ensures better levelness of the tray, as it prevents the verticality of the tower from affecting the tray’s levelness. In other words, if there are unavoidable errors in the tower’s vertical alignment, adjusting the tray during its installation can help maintain its levelness and avoid flow deviations. In the case of horizontal installation, the tower is placed on a horizontal surface during setup, and the levelness after it is erected is determined by controlling the verticality of the tray. Any error in the horizontal alignment of the tower will affect the installation accuracy of the tray, and any verticality errors after the tower is erected will also contribute to cumulative errors in the tray’s levelness.
It can ensure better levelness of the tray than horizontal installation.
They are all installed after the tower is assembled, which helps to maintain levelness. We are a company that manufactures components for packed towers.
Welded components such as the support ring and the tray connecting plate, or the tray itself, should be welded while the tower is in a horizontal position; the trays can then be installed after the tower is erected, which helps to ensure their levelness and prevents any impact on that levelness caused by the tower’s vertical alignment.
Reply to 5# yuanyongan, bro, where are you? Peers, learning together!
It is possible to erect the tower first and then install the welded components inside it, but both the installation timeline and difficulty increase significantly compared to vertical installation； Under normal circumstances, the components that are installed in a horizontal position and welded in place (such as support rings, liquid level control plate connectors, liquid receiving trays, or liquid level control plates, as well as collection tanks and other parts that are directly or indirectly welded to the tower body) are installed first. Other detachable components (such as tray plates, detachable liquid receiving trays, liquid level control plates, etc.) are installed after the tower body has been erected. Before installing the detachable parts, their levelness as well as any clearance that may meet the acceptance criteria should be rechecked. Installation of the detachable components can be carried out once there are no issues.
Reply to 6# Zhou Xiangheng: I’m in the south, working on interior design. Feel free to get in touch if you need anything; we can learn from each other*
This post was last edited by ali2277 on 2011-8-3 16:06. Sad! ! ! ;P The largest tower is DN2800, with 56 floors high, and it features \"two-stream\" tray design – there must be a great number of welded fixtures inside the tower (double downcomers, trays, beams, etc.):'( A total of 15 tower units are used in the construction: 6 are plate towers and 9 are packed towers. The general layout diagrams of all these tower units do not include any drawings showing the internal components, and the manufacturers of these towers only produce the empty shell structures.
This is generally the case these days; ultimately, it’s due to our low level of manufacturing expertise. Moreover, there are specialized suppliers for the accessories used in the towers, and their progress may not align with that of the equipment manufacturers, which often results in delays. Think about it: if that company in the tower plant sends all the internal components to the manufacturing facility, where they are assembled before being sent to the site, it results in a long processing time, and there are also issues regarding whether the roads can handle the weight. There’s also the issue of tower accuracy caused by this, which has been explained in great detail earlier, so I won’t go into it again.
This is generally the case these days; ultimately, it’s due to our low level of manufacturing expertise. Moreover, there are specialized suppliers for the accessories used in the towers, and their progress may not align with that of the equipment manufacturers, which often results in delays. Think about it: if that company in the tower plant sends all the internal components to the manufacturing facility, where they are assembled before being sent to the site, it results in a long processing time, and there are also issues regarding whether the roads can handle the weight. There’s also the issue of tower accuracy caused by this, which has been explained in great detail earlier, so I won’t go into it again.