What are the consequences of ammonia being present in acidic gas?
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This post was last edited by liaifeng on 2018-8-1 10:16. Sulfuric acid gases contain ammonia; does burning them produce NO? Does it have an impact on exhaust hydrogenation? Is the pH value in the quench water acidic or alkaline?
Under normal conditions, there is aminoacid-containing gas!
Which location do you mean that has ammonia, is it at the furnace inlet or something else?
Acidic gas entering the furnace, feed gas for sulfur
If there is an acidic water stripping unit, the acidic gas produced already contains ammonia. Sulfur production furnaces use ammonia-burning burners, and an ammonia decomposition reaction takes place inside the furnace; therefore, the temperature of such furnaces is generally maintained at 1350 degrees Celsius, as ammonia decomposition is an endothermic reaction.
There are no ammonia-burning burners, and the furnace temperature ranges between 900 and 1100 degrees. Thanks to the ammonia purification system, the goal is to ensure that the acidic gas contains no ammonia or as little as possible; in practice, the ammonia content in such gas is between 10 and 20 PPM. If the temperature does not reach 1350 degrees, will oxygen-deficient combustion result in the formation of NO? If so, will it have an impact on air distribution and the subsequent processes?
Nitric oxide is not produced under normal conditions, as the reaction that converts ammonia into NO is a catalytic reaction, and there are no metal catalysts in the combustion furnace. I think the subsequent impact will be salt deposition blocking pipes and equipment! Given this temperature, it seems that the concentration of acidic gases is not high. Is it a sulfur processing unit in the coal chemical industry?
This post was last edited by notemper on 2018-4-14 00:13. Does NO make quench water more acidic? For example, SO3
When the ammonia content in acidic gases is low, it has no significant impact. Air quality also affects nitrogen oxides in exhaust gases, for example during foggy weather
Imported acidic gas contains ammonia; upon entering the sulfur production furnace, it participates in the combustion reaction, increasing the load on the furnace. The NO produced facilitates further oxidation of sulfur dioxide to sulfur trioxide, which then reacts with water to form sulfurous acid that corrodes equipment and pipelines. Sulfurous acid and ammonia combine to form salts that can block pipelines, and they can also render the catalysts in subsequent systems inactive.