Catalyst loading method
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Who has filled David’s synthetic tower catalyst? It’s the type where water flows through pipes and the catalyst is located outside. How to ensure even catalyst loading, without any areas being unsupported or offset? How do I install it? The catalyst between the closely spaced tubes is very difficult to install.
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Find a specialized company for catalyst loading – they have professional equipment and instruments to ensure that the catalyst is loaded properly and without any errors. If you really want to do it yourself, the process will be slow; moreover, it’s necessary to sieve the catalyst powder, and after each amount of catalyst is added, its height and pressure drop need to be measured, with any imbalances having to be corrected. This isn’t something that can be explained in just a couple of sentences, haha.
How to measure the voltage drop? I installed various types of catalysts; I fitted them myself in nearly 20 towers and tanks. Hehe, it’s rare to see people who specialize in transitions doing this. Side height is commonly used. The evenly distributed funnel-shaped bags, which are referred to by foreigners as “Chinese guy hats,” are used to measure the height of the catalyst surface after being in use for a while; I’ve done this before, but how do you measure the pressure drop? I really have never seen it
Reply to 4# lizhaoye: There are specialized instruments for measuring pressure drop. I’m not sure if you have ever used a tubular synthesis tower before After installing a section, insert the measurement port of this instrument into the pipe opening, and then pressure drop can be measured; the results are quite accurate. By measuring each pipe, it is possible to determine whether there is any flow deviation. I’ve never used the method you mentioned of allowing water to flow inside the tube while filling the outside with catalyst, but the principle should be the same; there are probably specialized instruments for this purpose as well.
Reply to 5# fossil-zhang: Wouldn’t it take a long time if we measured each tube? I’ve never installed it; I don’t quite understand it!
You mean the water flow in and out is through the coiled tube, right? People can go inside the synthesis tower and install it. It’s quite simple.
If going the shell side route, people can simply draw in the liquid
Suction container? I’ve never heard of it. How do I install it?
Filling the catalyst is not very difficult; careful attention will do. Firstly, each column catalyst has a designed bulk density, which is the most important parameter; filling should be carried out as closely as possible in accordance with this bulk density. Secondly, it is possible to omit the use of 1 meter or 0.5 meter worth of catalyst; by dropping a weight using a plumb line at the same horizontal level, 20–30 points should be selected (evenly distributed and representative) to measure the vertical height from the top of the tower. This ensures that the catalyst is distributed evenly, thereby preventing uneven flow in the future. This process is relatively slow. Our production capacity is 580,000 tons per year; it took us 3 days and 3 nights to install the catalysts. Moreover, we ordered 5% more catalyst than was actually needed, and it was all filled in. This ensures that even if the installation is not perfectly uniform in some areas, the overall volume is sufficient to prevent any impact on production. It appears that the catalyst performs stably, with no issues such as flow deviation
Reply to 5# fossil-zhang: The method for measuring the pressure drop should be to first measure the pressure drop in the duct; it’s sufficient to take readings at both ends. After each section of catalyst is installed, the pressure difference between the two ends is measured – this is what an experienced technician told me today!