Comparison of dry desulfurization
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It is divided into high-temperature desulfurization and room-temperature types. High-temperature advanced desulfurization employs cobalt-molybdenum hydrogenation and ZnO processes to remove organic sulfur from the feed gas. Its main drawback is high energy consumption and long driving time. Fine desulfurization at room temperature utilizes a catalyst for the hydrolysis of carbon monoxide sulfide, which enables COS to be hydrolyzed into H2S at room temperature; thereafter, ZnO is used to remove H2S. Fine removal of H2S using ZnO at room temperature is possible (under standard conditions)
We use activated carbon desulfurization agent at room temperature； It is used after decarburization, in a two-tower adsorption process: the first tower uses T104-type activated carbon, which primarily absorbs H2S, while the second tower also uses T104-type activated carbon, which is used to convert and absorb organic sulfur as well as H2S ； The system has no heating mechanism and operates at room temperature only ； The H2S level entering the advanced desulfurization system is generally below 10 mg/m3, and after advanced desulfurization, the H2S
Dry desulfurization: two desulfurization tanks, which can be connected in series or parallel; one of them can be replaced at any time. The filling capacity is approximately 31 tons, and the service life is 3-4 months.
Dry desulfurization: 2 ferro-manganese desulfurization tanks + 1 zinc oxide desulfurization tank. The capacity of each ferro-manganese desulfurization tank is 17.2 M3; they can be connected in parallel or in series. The zinc oxide volume is 12.6 M3, and it is used in series with ferromanganese. The service life of the iron-manganese desulfurization tanks is 1 year; they are used in series with two tanks being replaced alternately. The service life of zinc oxide is 3 to 5 years, and we have been using it for 5 years with good results.