The gas distributor at the bottom of the stripping tower falls off
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This post was last edited by lxq700918 on 2009-8-4 17:53. During the driving process after our overhaul, we found that the liquid discharge from the stripping tower was not smooth. After sealing the tower, it was opened and checked that the screws at the liquid outlet regulating valve LV2202 were blocked. It was initially determined that the bolts at the flange connecting the gas distributor in the stripping tower and the carbon dioxide gas pipeline were broken, and the gas distributor had fallen off. Now we discuss the reasons why the gas distributor at the bottom of the stripping tower falls off and its impact on daily production in the future. The gas distributor at the bottom of the stripper fell off. Is it because the manufacturer did not tighten the connecting bolts sufficiently? We have been running the equipment for Nanjing Chemical Machinery for 16 months. The valve core of the second stop valve for liquid discharge was damaged by the screw. This post was last edited by 1025199692 on 2009-3-28 12:57 ]
It is recommended that you bolt the gas distributor at the bottom of the stripper and then perform full welding. This is how many internal parts are connected now.
The main reason why the distributor falls off is: 1. During operation, the gas volume control is unstable. During the initial startup, temperature rise, passivation and pressure increase, the operating methods were not followed. The air intake volume was too large, or the pressure was too high, causing the distributor connecting bolts to loosen due to impact or fatigue fracture. 2. The internal parts of the equipment are not securely connected during installation. It is recommended that during operation, especially when driving, attention should be paid to the boost speed and air volume to ensure that the distributor is not stressed too hard.
The CO2 distributor at the lower part of our stripping tower is also connected by bolts, and no problem of falling off has been found in recent years. Regarding the situation mentioned by the poster, is it because the bolt material is improperly used, causing the bolts to become corroded and fall off? However, the poster can confirm by checking the screw found at the liquid outlet regulating valve LV2202.
The connecting bolts fell off, on the one hand, because the gas distributor vibrated too much during use, and on the other hand, the bolts were not tightened enough. Solution: 1. In addition to being connected to the air inlet flange, the gas distributor should also be equipped with a support seat fixed on the tower body to strengthen its fixing effect. 2. All connecting bolts use double-headed bolts, and each end is equipped with double nuts and washers.
The bolts show no signs of corrosion and the bolt threads are intact.
There seems to be something wrong with Nanjing Chemical Machinery. The gas distributor should be welded so that it will not fall off easily. :)
It is normal for this situation to occur. After re-repairing, just provide some fixed supports. In one, check whether the intake line vibrates greatly during normal production, which has little to do with Nanjing Chemical Machinery. This post was last edited by lxq700918 on 2009-3-30 12:44 ]
Did you spot weld the nut? We generally spot-weld the internal nuts of the high-pressure system, but after a cycle of operation, they still fall off in some places, mainly in the synthesis tower. The distributor of our stripper is fully welded and remade from gold.
The main reason why the distributor falls off is: 1. During operation, the gas volume control is unstable. During the initial startup, temperature rise, passivation and pressure increase, the operating methods were not followed. The air intake volume was too large, or the pressure was too high, causing the distributor connecting bolts to loosen due to impact or fatigue fracture. 2. The internal parts of the equipment are not securely connected during installation. It is recommended to tighten the distributor connection bolts and then weld the connections while controlling the boost pressure and flow rate.
During operation, the carbon dioxide gas volume control is unstable. The air intake volume is too large or the pressure is too high, causing the distributor connecting bolts to break or loosen due to impact fatigue.
The gas distributor has fallen off. Is that okay? Can the stripping efficiency be good? Is the outlet liquid temperature of the stripping tower over-temperature? How many tubes does your factory have for the stripping tower? Nanhua Machinery manufactured a tower with 2,800 pipes more than ten years ago. There is no good way, just weld it to death. Manufacturers don't pay much attention to small things, and they don't know their importance. This post was last edited by YHL512777 on 2009-4-27 20:18 ]
Friends from Ren Woxing: "During the driving process after the overhaul," did you remove the sealing head for inspection during the overhaul? You must remove the sealing head when replacing the stripper pipe. What was the original stripper liquid outlet temperature and stripping efficiency? I want to know. Looking forward to hearing from you.
The head was not opened during the overhaul. The outlet liquid temperature of the stripping tower is normal and the stripping efficiency is slightly reduced.
Thank you for your reply. Once the CO2 gas distributor of a stripping tower (2600 tubes) fell off, it had a great impact on the outlet temperature and stripping efficiency, so I would like to know more about it and make a comparison.
Because there is no corrosion on the bolts and nuts, and it is not that the distributor connecting bolts are loose due to impact or fatigue fracture, the most likely reason is that during operation, the compressor load fluctuates greatly, the corresponding gas volume fluctuates greatly, and the pressure is high: or the original startup, temperature rise, passivation, and pressure increase were not carried out according to the operation method, resulting in large gas volume fluctuations.
The connecting bolts fell off, on the one hand, the vibration was too great during use, and on the other hand, it was also due to the material of the bolts themselves. The material is special! ! Solution: After all connecting bolts are tightened, the welding points are dead and must be inspected during annual overhaul! !
17# lth It would be too expensive to open it every year. Disassemble the radioactive source and open the head