DN900 Packing Tower
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There is currently a DN900 packed tower with a height of 40 m; the packing used is structured packing, and the tower is divided into five sections. In terms of equipment installation and manufacturing: 1. 24\" manholes are used between the packing sections for installing the packing and distributors; the redistributors are utilized for ； 2. Equipment flanges are used between the packing sections; the tower is divided into 6 sections, with packing and distributors installed in each section. Which option is more reasonable?
It is recommended to choose the first option. But there are also objections: 1. Why are 24\" manholes used between the filler sections? Can’t square manholes be used instead? 2. Is it appropriate to use flanges in the middle of a packed tower? I have never seen flanges being used in such applications.
It is recommended to use manholes for easy operation. If the second option is chosen, not only will the construction costs increase, but it will also be very troublesome to replace the filler or carry out repairs in the future.
This post was last edited by xlxuiin on 2016-12-27 08:18. The second one. We have used DN800 plate towers, guys. Is there still enough working space for a person when the diameter is 900? Isn’t it uncomfortable to disassemble and assemble the distributor and packing? ! !
I think the second option is better – a DN800 packed tower with a segmented design that does not have manholes
It depends on the design and installation capabilities of the suppliers of the packing and internal components of the tower; if reliability is a concern, the first option should be chosen. The second option is more convenient for installation. Generally, for towers with a capacity of 800 or less, flange connections are used, while for those with a capacity over 800, manholes are used for installation. It’s not clear what method is used in large petrochemical towers； Flange mounting facilitates installation and reduces height, but it increases equipment costs and makes maintenance more difficult; it is also not suitable for maintaining a high vacuum level in high-vacuum towers ；
Using flange connections increases manufacturing costs, as well as costs related to installation, maintenance, and repair; overall, it is not a suitable option. It is recommended to use manholes; if maintenance and disassembly of the packing are considered, a discharge handhole can be installed above the packing grid. As for the installation and removal of the distributor, although it is a bit troublesome, it is still more appropriate to install an access hatch overall.
We choose the first option; generally, a tower with a capacity of 900 also has access holes, allowing people to enter it, so there are no issues with installation； The investment in the second type of equipment has increased