一、前言。氨合成塔是合氨工业中的关键设备。合成塔触媒层的温度是合成塔最重要的控制参数,对保护氨触媒的活性和延长触媒的使用寿命,提高氨合成率,保证合成塔的安全运行都具有重大意义。因此保证温度检测的准确性和可靠性,正确而迅速的分析、判断和排除各种故障是非常重要的。在长期的生产实践中,对合成塔温度 I. Introduction. Ammonia synthesis tower is the key equipment in ammonia industry. The temperature of the catalyst layer of the synthesis tower is the most important control parameter of the synthesis tower, which is of great significance for protecting the activity of the ammonia catalyst, prolonging the service life of the catalyst, increasing the ammonia synthesis rate and ensuring the safe operation of the synthesis tower. Therefore, to ensure the accuracy and reliability of temperature detection, correct and rapid analysis, to determine and eliminate a variety of faults is very important. In the long-term production practice, the temperature of the synthesis tower