Problems with the stripping tower and regeneration tower

Is it because the valve opening for the return of acidic gas to the stripping tower is too large, which causes the pressure in the regeneration tower to be released into the stripping tower? That’s why the pressure in the regeneration tower drops! If that’s the case, you can just close the return valve! Also, is your acidic gas reflux pipeline designed to be too large, resulting in an excessive amount?

Could you clarify what the manufacturing process is? Cannot answer.

It might be that the tuning of your self-acting valve is not proper, the volume of the gas being processed is too low, or the hydrogen sulfide content is too low

Reduce exhaust pressure! Reduce the reflux flow of acidic gas! Control the pressure of the concentration tower by methods such as partial venting of acidic gases

The pressure control in the regeneration tower is not satisfactory; the main issue is the inaccurate adjustment of the valve opening for acidic gases, along with unstable operation of the feed pump in the regeneration tower

It’s probably because the opening degree of the valve for returning acidic gas and the opening degree of the valve used to send it to sulfur recovery aren’t properly controlled in proportion!

Yes, the opening degree of the valve for external supply of acidic gas can be adjusted. In fact, the pressure of the acidic gas, which is also the pressure in the regeneration tower, is determined by the backpressure and pipeline resistance; generally, there is no need to control it. Usually, the lower the pressure, the better the regeneration process； Is the low pressure in the regeneration tower you mentioned caused by a low heat load at the bottom of the tower, a small amount of steam rising, and incomplete regeneration of hydrogen sulfide and carbon dioxide? . . . Haha, it’s very likely that there is non-condensable air on the steam side of the reboiler, which results in poor heat exchange; the steam doesn’t condense, and heat cannot be released, hence insufficient heating. . . I encountered this situation once after a major repair while driving; I was unable to move forward for over ten hours. It was I who suggested releasing air from the steam side, and soon the temperatures and pressures at the bottom and top of the tower increased

The acidic gas exported is sent for sulfur recovery; if the pressure is too low, it cannot be sent!

Could the original poster upload this part of the flowchart? It will be possible to draw a conclusion only after seeing it. Several factors can be considered: (1) Whether the feed to the regeneration tower fluctuates greatly, as the amount of material transferred from the stripping tower to the regeneration tower has a significant impact on the pressure in the regeneration system ； (2) Are there any oscillations in the pressure control valves of the concentration line or regeneration tower?