The difference between ammonia escape and ammonia leakage

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In short: ammonia escape is caused by an excess of ammonia, with the surplus ammonia remaining in the flue gas. Ammonia leakage means it escapes into the atmosphere. Part 1: Ammonia Escape 1. What is ammonia escape? Ammonia escape refers to the situation where, during the production process, more ammonia is produced than is actually needed; the excess ammonia, after reacting in the reactor, is discharged through the waste outlet, and this is known as ammonia escape. Ammonia escape is an important parameter affecting the operation of SCR systems, and it can be expressed as the ammonia content per unit volume (ppm). 2. How does ammonia escape occur? The excess ammonia that reacts with nitrate (i.e., nitrogen oxides) during production and treatment processes moves along with the flue gas to the desulfurization tower and dust collector, and is finally released through the chimney; this process is known as the ammonia escape pathway. 3. Why does ammonia escape occur? Ammonia escape occurs as a result of an excessive amount of ammonia being used in the pollution control process. Ammonia is typically employed in power plants for denitrification, where it reacts with nitrogen oxides to produce nitrogen and water. If too little ammonia is used in the denitrification equipment, the desired denitrification effect is not achieved; on the other hand, if too much ammonia is used, it will be released directly through the emission outlets, causing secondary pollution. Additionally, ammonia can react with SO2 present in flue gases to form ammonium bisulfate and sulfuric acid. 4. What is the purpose of monitoring ammonia escape? (1) Prevent excessive amounts of ammonia from being injected, thereby avoiding economic waste ； (2) Prevent secondary pollution caused by excessive ammonia usage ； (3) Excessive ammonia leads to the formation of large amounts of ammonium salts in wet flue gas desulfurization systems, resulting in significant scaling that severely affects the proper operation of these systems. At the same time, excess ammonia can also cause severe corrosion of the pipes, pumps, valves, preheaters, and other components in the desulfurization system, thereby reducing their service life. Part Two: Ammonia Leakage Ammonia leakage refers to the escape of ammonia gas into the external environment during normal operation. Potential hazards: (1) When ammonia mixes with air and comes into contact with an open flame, it can cause an explosion, posing a threat to human safety and the integrity of equipment. (2) Ammonia leaks can cause environmental pollution. (3) Ammonia poses serious risks to the human respiratory tract, eyes, gastrointestinal tract, and liver; in severe cases, it can be life-threatening.