In the process of producing ammonia, we use cascade control method to make the catalyst hotspots temperature stable, so as to increase the quality of production.

在氨肥厂生产氨的过程中，引用串级控制方式来对合成塔触媒层的热点温度进行稳定控制，以提高生产质量。

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The accuracy can be optimized by strengthening quality control of critical factors in the process of test of ammonia density in indoor air with indophenol blue photometric method.

通过对室内空气中氨的靛酚蓝分光光度法检测的整个相关过程的影响因素进行质量控制，从而提高室内空气中氨浓度检测的准确性。

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This article presents the automatic targets of the production process control of synthetic ammonia and the design conception of the control system, along with its function design.

本文介绍合成氨生产过程控制自动化目标和控制系统的设计方案及其功能设计。

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