The alkali consumption for desulfurization of transformed gas is high; let’s analyze this
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Our factory uses the tannin method for desulfurization, and very little tannin is used. But recently, the alkali consumption has also increased significantly. Initially, it was thought that the amount of recycled air was insufficient, so one nozzle was removed (now 8 nozzles are in use, with a flow rate of 40 m/h). It increased the regeneration pressure and the amount of air drawn in, but it had little effect. I don’t know what the reason is? Please help me analyze the following data: the volume of gas processed is 40,000 M3 per hour; 0.4 tons of alkali are used per day, and 5 kilograms of tannin are used per day. The imported hydrogen sulfide level is 80–120 mg/m3, while the exported level is 10 mg/m3. Let everyone suggest anything else; I’ll provide it.
Has the solution analysis been done? Are all components within the criteria?
This post was last edited by zhu*nguo019 on 2010-12-6 at 22:23. Components of the solution: vanadium at 1.0 g/l, tannin at 3.5 g/l. A month ago, adding just 0.1 ton per day was sufficient to maintain a pH level of 25 g/l; but now 0.4 tons per day is required merely to keep the level stable, with the current value ranging between 16 g/l and 20 g/l. The concentration of by-products is also low (even lower than it was a month ago).