How to increase the H2S concentration in the H2S concentration tower of low-temperature methanol washing
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How can low-temperature methanol washing be used to increase the H2S concentration in the H2S concentration tower? If control is achieved by adjusting the methanol circulation rate, what impact does this have on the distribution of cooling capacity within the system?
Mainly, it involves appropriately reducing the operating pressure of the hydrogen sulfide concentration tower and using an appropriate amount of nitrogen for stripping; this has little impact on the cooling capacity
Re-circulate the fluid to continuously increase its concentration, raising the H2S concentration. By controlling the methanol circulation rate, the amount of the component absorbed by the methanol changes, and accordingly, the amount of cold energy released after separation also changes.
Increase the concentration by 1 and reduce the operating pressure of the stripping tower. Reduce the carbon dioxide partial pressure; use nitrogen for stripping in a suitable manner during operation. 2. The reflux at the top of the thermal regeneration tower that is used to feed back into the stripping tower can be increased appropriately. 3. The general sulfur content depends on the coal quality. In our facility, due to the medium used, a flash tank was added in front of the heat regeneration tower during the initial design phase. It has one more tank than the traditional 4-tower process, with the vapor being sent back to the stripping tower for further concentration.
At Dalian University of Technology, sulfur can be removed from acidic gases through a concentration pipeline leading to a concentration tower in order to increase the hydrogen sulfide concentration; this is a simple and effective method
Generally, the method of increasing the reflux at the tower top is employed; if the circulation volume is changed, the amount of CO2 removed also changes, and consequently the cooling capacity of the system changes as well.