H2S scrubbing is a gas removal process. Caustic scrubbing is one of the most effective methods for this. This process is a well-known one as it can remove acid species from various gasses and H2S as well. A caustic scrubber is available to remove sour refinery gas with sour water stripper gas and with or without carbon dioxide. Let’s know about how to scrub H2S gas and more.
The absence or presence of CO2 is important when you are using a caustic scrubber. If there’s no CO2, the scrubber will be contacted with the recirculated solution in a sealed area.
If the gas has a high level of carbon dioxide, it can create some issues with the caustic scrubber. It can create unwanted consumption of sodium carbonate solids. However, there are special designs that allow the H2S Scrubbing easier even with a high level of CO2. In the new methods, the absorption of CO2 is much slower than that of H2S. Other methods are used to treat sour water stripper gasses with the caustic scrubber. This scrubber is also used as a backup method to shut down the process and for Claus units.
You will have to go through several factors while choosing the right caustic scrubber structure for the task. You can use the one that works for H2S removal, here the entire gas level is removed. Although other components of the gas are absorbed, it also depends on how often the unit will be utilized, if the caustic scrubber will be disposed of or sold, and the cost of it.
How Do H2S Scrubbers Work?
A scrubber for H2S gas has three sections. The absorption part is a recirculation tank with a pump and a droplet collector.
A scrubber works as a refiner in a lab or a gas station. The stream of the particular gas is brought in touch with a liquid, and then the component passes through the solution to get refined. When the stream of gas goes through the liquid, it loses some components that are not required in the gas. A scrubber is used as an emission-restricting system, so the gas does not leak from the tanks. Scrubbing is also known as absorption. During the process, the scrubber absorbs other components to refine the gas. When the gas is transferring through a channel it transfers some other components. The amount of items that pass through the liquid depends on the ability of those components to mix in the solution. It can happen that, micro-organisms and chemicals are added to the liquid to neutralize or convert the gas that is mixed in the scrubbing solution. After the conversion, the concentration in the liquid is reduced and it allows the gas to mix in a better way.
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You can use high-foam surfactants or know more about them from a professional. That way you will get more information about the best H2S gas scrubber for your refinery or lab.
Conclusion
Scrubbing H2S gas isn’t an easy process. It requires a special type of scrubber that can eliminate the gas and other components from the liquid or gaseous solution. To know more about a gas scrubber, you may go through this article, and don’t forget to talk to a professional before investing in a product.
