Operation cycle of sulfur recovery unit

The specific time is uncertain and will be determined based on the start-up and shutdown of upstream units.

This post was last edited by adsl121 on 2009-6-1 15:13. I. It involves measuring pipe wall thickness due to pipe corrosion, as well as determining the number of leakage points on site and the importance of safety. II. Examine the catalyst activity and determine the recovery rate. Especially regarding the hazard level, any modification or shutdown requires the vehicle to be stopped for maintenance. One also needs to be forward-thinking; when there’s another opportunity for maintenance, make the necessary repairs and replacements. Don’t be afraid to spend money to ensure long-term safe and stable operation. Don’t wait until something breaks before trying to keep going, as there won’t be any money available then. For example, in cases of severely corroded pipe sections, they should be replaced regularly – even if they don’t leak for 3 years – as well as the catalyst. If there’s little reaction in the upper layer, but the output still meets the standards and the recovery rate is acceptable, then more effort should be put into the lower layer, and the components there should be replaced whenever possible. The wall thickness of boiler condensers should be checked regularly, along with conducting pressure tests; if the pipes become too thin, replacement should be carried out ahead of time, so as to avoid having to deal with leaks later. Wait, everything has a cycle; nothing that’s good will never break. Think about it a day in advance and avoid confusion for years!

What was said upstairs makes a lot of sense; I’ve learned from it. But the wall thickness of the boiler condenser should be checked regularly, pressure tests should be carried out, and if the pipes become too thin, they should be replaced as soon as possible. Don’t end up crying because of leaks. "I’m not quite sure about this sentence – isn’t the cost of replacing the tubes or tube sheets low?

It should mainly be carried out in synchronization with the maintenance of upstream units; the total amount of sulfur in the entire plant’s crude oil processing must remain balanced, unless there are multiple sulfur recovery units and a large surplus in the total amount of sulfur recovered. Regarding the catalyst replacement during shutdowns, if the reactor temperature rise or the actual conversion rate before shutdown are still acceptable, and there is concern that without a replacement during maintenance the reactor won’t be able to withstand the next cycle, I believe it would be possible to update only one-third to one-half of the catalyst in each reactor, which should help save some costs.

Our equipment is currently scheduled for maintenance once a year to address any issues, and for overhauls every three to four years. The main reason is that the catalyst in the upstream ADS unit needs to be replaced annually.

1. Try to handle problems without shutting down operations whenever possible; avoid letting the equipment run while faulty, as this poses significant risks； 2. We generally replace the catalyst every 3 years; by paying close attention to operation practices to ensure that carbon does not accumulate in the bed layer and that temperatures do not exceed safe levels, there are usually no major problems ； 3. In areas where corrosion and erosion are severe, it is essential to regularly check the thickness of the pipe walls, so as to eliminate potential problems at an early stage; do not wait until leaks occur before taking action.

We usually stop operations for maintenance only when there is a failure, or we conduct maintenance together when the upstream units need repair

With normal operation and regular maintenance, it can be used for ten years without any problems

I remember it lasted for a pretty long time; seven or eight years should be no problem

I’m just starting to work with sulfur recovery units; I’m not yet familiar with the conditions on site. However, the operating instructions for the equipment are very important – it’s essential to follow them strictly. This will help avoid many unnecessary problems. Regular maintenance can keep the equipment in good working condition, reducing the likelihood of issues arising. When stopping or resuming operation, it is essential to perform purging to prevent excessive oxygen levels in the internal cavities of the equipment