I’m seeking help from all fellow sailors regarding the purging issues that occur during the first operation of acid water stripping and solvent regeneration! ! ! !
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For the first operation of stripping and regeneration, procedures such as purging, pressure testing, airtightness testing, and water washing are required. Question: 1. Is steam or air used as the purging medium? If steam is used for purging, are the thermal stresses on the pipes taken into account? Apart from water hammer, could thermal damage be caused to the pipes? ； Additionally, it should be determined whether steam purging enters the tank or the solvent tank; if it does, whether the anti-corrosion coating on the tank might peel off due to the high temperatures. After all, the operating temperatures for acid tanks and solvent tanks are only 60-70 degrees. 2. What medium is used for pressure testing? Upon checking relevant information, it was found that many suggestions recommend using water for pressure testing. Please briefly describe the advantages and disadvantages of pressure testing various types of media! 3. Which order is more reasonable for the processes of purging, pressure testing, airtightness testing, and water washing? I hope all fellow sailors will engage in more discussions to establish a more reasonable startup procedure for the sulfur combined unit! Please have the forum owner pin this post so it’s easier for everyone to discuss and learn! Thank you!
The traditional approach is generally as follows: 1. Use steam purging (steam purging is also applied when the unit is shut down)； During purging, steam must not enter the tank, filters, and other related equipment; however, it can enter the heat exchanger. But first, the inlet flange must be removed, and after the area has been thoroughly purged, then can the heat exchanger be purged, with venting being done on the other side. 2. For the pressure testing of acid water stripping, nitrogen is generally used; water-based pressure testing usually refers to the pressurization of pipelines during the construction of the facility. 3. In terms of the sequence of operations, it is generally water flushing, steam purging, airtightness testing, and water testing; airtightness testing and water testing can be carried out together. For reference.
1. What is the reason for choosing steam? What’s better about it than the wind? If steam is used, can it be fed into the air cooler? 2. The nitrogen pressure is 0.6, and the pressure after the water pipeline pump is 0.75 – is this sufficient? 3. Water remaining in the system after rinsing will inevitably cause water hammer during steam purging; airtightness testing and pressure testing should be carried out together.