Corrosion Analysis and Protection Research of Dual Pressure Nitric Acid Production Equipment
In order to further explore the corrosion protection issues of dual pressure nitric acid production equipment,this article combines the existing corrosion and damage problems of absorption tower cooling coils in a chemical plant.Through simulation experiments and mechanism analysis,two measures are taken to study the causes of corrosion.Finally,it is determined that the reason for the corrosion of absorption tower cooling coils is the high chloride ion content in the cooling water and the unreasonable connection mode of the coils.Therefore,dechlorination devices were installed on the 9th to 15th floors of the absorption tower,and direct hot bending technology was used instead of traditional welding technology for corrosion protection.From practical application results,the above measures have achieved certain protective effects.
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