Ammonium nitrate fertilizer manufacturer with high temperature inline environments - Case Study
Ammonium Nitrate Fertilizer Manufacturer - High Temperature Inline Environments
- Strong Acid/Fluoride Resistant pH Element & High Temperature and Acid/Fluoride Resistant Solid State Reference Junction.
- Chemically & Thermally Resistant ULTEM & PEEK plastic body housings
- Application Oriented Engineering and Custom Built to Order sensor increased the lifetime by Two to Five Fold
The Problem
An ammonium nitrate fertilizer manufacturer was lacking a pH sensor that offered accurate measurement in high-temperature inline acid and ammonia environments, resulting in under reacted chemicals with lower production yields. The extreme process conditions resulted in limited lifetime for the sensor; which rarely exceeded days or weeks in the reactor and only functioned for up to a month in a specially constructed heat-reducing bypass system. To circumvent this problem, the manufacturer had to cool the sample by diluting it 1:1 with water via the heat-reducing bypass system. This action solved the temperature problem, but decreased the accuracy of the measurement making it dependent on the 1:1 sample to water ratio measurement. The signal also was delayed because of the addition of the bypass line. If the reaction was running on the ammonia excess side, the ammonia gas entered the sensor and destroyed the secondary reference half cell, thus suddenly and significantly reducing the operational lifetime of the sensor. If the process was allowed to run on the nitric acid excess side, the result was under reacted ammonia gas and rapid aging of the pH element.
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