Effect of formaldehyde added to the large particles in the urea plant on the high-pressure ring
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My unit is a CO2 stripping unit equipped with a pool-type condenser. Please give me an answer, teachers
Formaldehyde from large-particle urea is added through the evaporation system, and it should have no effect on the high-pressure chamber.
A small amount of formaldehyde enters the ammonia tank and returns to the high-pressure circuit through the circulation system. But this amount is relatively small and can be ignored. However, it is generally necessary to monitor the formaldehyde concentration in the ammonia tank.
Impact of formaldehyde on the urea system and other units in the plant: effects on hydrolysis and decomposition; increased decomposition pressure, and substandard water quality. It will then affect the desalinated water; the impact on the circulating water is currently unknown. It has an impact on the high-voltage circuit, but the effect is not significant; the overall efficiency of the system decreases as a result.
Let’s conduct a analysis of the formaldehyde content in the ammonia tank; it should be in trace amounts, so there shouldn’t be any impact.
Large particles of formaldehyde are added before granulation; trace amounts of formaldehyde may end up in the ammonia tank. In my opinion, this has little impact on the high-pressure system, but it affects the hydrolysis system, resulting in an increase in ammonia nitrogen levels in the waste liquid, sometimes even above the permissible limits.
Agree with the view above; it has no impact on high-pressure systems and only causes an increase in the conductivity of the waste liquid
Although formaldehyde is added through the evaporation system, it can enter the system via the process condensate; some studies indicate that it may consume a small amount of oxygen in the high-pressure equipment, but it has no other impact on the system.