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Why Dry Scrubbers are Good for the Environment Industrial exhaust gases contain a lot of harmful materials. It is essential for these harmful materials to be removed before releasing them into the atmosphere. The dry scrubber system is very beneficial in removing these harmful materials from exhaust gases. Dry scrubber systems are just one type of scrubber used for the removal of harmful materials in exhaust gases. Today, plants use these dry scrubbers. With the use of dry substances, dry scrubbers are able to remove acid gases which is the cause of acid rain. How a dry scrubber works is much the same as how other scrubbers do. The method of dry scrubbing involves a collection of dry reagents sprayed into an exhaust stream. There is a chemical reactions produced that works in different ways. Depending on the materials that needs to be removed, the chemical reaction takes place. One results of the chemical reaction is that some materials are able to neutralize harmful pollutants in the stream. The material can turn into another substance upon reacting with the reagents. And this newly formed substance is then caught in the particle stream or falls out of the gas stream. The vented exhaust gases may look dark of invisible since no vapor is added in the process. Dry scrubbers are mainly used to eliminate gases from sources of combustion. At very high speed, dry reactants are introduced to the exhaust gases, and this is how dry scrubbing is done. What this causes is the neutralization of the pollutants in the gas. There are steps by which this is done. Gas cooling is done first. After that is the injection of the reagent followed by filtration.
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The preparation of the exhaust gases starts by cooling them. Pollutants and other toxins can easily be removed from the gas if the gas is cooled. The evaporative cooler is used to dilute the exhaust gas. When the gas has been cooled, the reagent can be injected already. In this step the harmful components of the gas are removed. How to choose components of the dry reagent is through their neutralizing properties. Sodium bicarbonate is almost always chosen because of this property. Different kinds of powders are mixed together and injected at high pressures into the exhaust gas. The injection of the dry reagents causes chemical reactions and this results in the lessening of the gas acidity and the removal of harmful pollutants. The used scrubbing powder is then captured through a fabric filter and the cleaned gas goes out of the scrubbing chamber. IF the used scrubbing powder is cleansed, it can be reused for another dry scrubbing. However, it should also be disposed of frequently since it really cannot be washed properly.
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The impact of dry scrubbing on the environment is something positive. If hazardous substances are removed from exhaust gases then these pollutants will no longer be released into the atmosphere.

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