Treatment methods for small amounts of high-concentration hydrogen sulfide
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What are some low-investment treatment methods for small amounts of high-concentration hydrogen sulfide that also meet environmental regulations?
Is it usually alkali washed? Just hydrogen sulfide? I have seen cases before where, after alkaline washing of refinery dry gas, it was recovered and fed back into the pipeline network for combustion~~~~
If the concentration is high but in small amounts, it can be fed into the alkali washing tank; the reaction time will be longer, so the inlet pressure should not be too high. Two tanks can be connected in series to monitor the concentration of the alkali solution, which should be replaced regularly. If continuity is high, it is recommended to use a spray tower with spiral nozzles
Does alkali washing generate industrial wastewater?
A small amount can be burned directly in an acidic furnace, which results in lower construction costs; however, the operating costs are high, as a large amount of fuel gas is required
If there are heating furnaces, industrial furnaces, or boilers near the odor emission point, it is possible to install an additional corrosion-resistant plastic fan to draw in the odor containing trace amounts of H2S from that point, along with a small amount of air (approximately 300 Nm3/H). This air is then fed into the inlet silencer of the combustion fan in the nearby industrial furnace. The combustion fan increases the pressure of this odorated air along with the larger volume of air present there, and it is sent into the air passage of the burner at the top of the industrial furnace. The fuel gas (off-gas) and the odorized air burn together in the combustion chamber; the high temperature of 1000–1600 degrees Celsius in this chamber converts all of the H2S into SO2, which is then released through the chimney, thereby eliminating any odor pollution completely.