Weekly Topic December 3, 2015
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What are the pretreatment measures to reduce hydrocarbon content in acidic gases?
This post was last edited by ylb913 on 2015-12-3 at 17:35. A flash tank is used for the recycled rich amine liquid, which is heated to 60 degrees before flashing.
There are different opinions regarding the temperature for flashing; is 60 degrees the optimal flashing temperature?
What are the pretreatment measures to reduce hydrocarbon content in acidic gases? Adjusting the flash temperature and flash time, among other measures, to reduce the hydrocarbon content in acidic gases
This post was last edited by chenlaid on 2015-12-6 at 16:24. 1. Strictly control the temperature of the lean liquid to prevent the precipitation of liquid hydrocarbons due to low temperatures. 2. Optimize the operating parameters of the rich liquid flash tank. 3. Regularly drain liquid from the acidic gas separation tank and the reflux tank at the top of the regeneration tower into the wastewater stripping system to reduce the amount of oil carried along. 4. Ensure stable operation of upstream units; fluctuations or abnormalities in the upstream process will result in more hydrocarbons being carried to the regeneration unit
1. The temperature of the rich liquid flash tank is generally not adjustable, but the flashing pressure can be reduced as much as possible; we keep it at 0.05 MPa. 2. The buffer tank and rich liquid flash tank of the acidic water stripping unit require regular oil skimming to prevent the accumulation of large amounts of oil-contaminated liquid. 3. Another point is to stabilize the operation of the upstream equipment, in order to prevent level sensor failures that could result in large amounts of oil being released.
Is there any equipment that includes packing between the raw gas inlet at the bottom of the absorption tower and the liquid level of the rich liquid, in order to reduce the amount of gas carried along with the rich liquid?
Generally, there isn’t any. The packing is located in the upper part of the absorption tower. If packing is added at the bottom, and operations in the sulfur production section are not stable, the sulfur-containing exhaust gases that reach the cooling section may cause a small amount of sulfur or other impurities to clog the packing, thereby increasing the system pressure difference. There’s no need for that though
The main issue is controlling the problem of hydrocarbons in the rich liquid stream from the upstream units