Variants of modernization of the automated control system of the nitrogen oxide gas absorption unit used in the production of nitric acid are offered. These solutions do not require large capital costs for devices and equipment, provided that microprocessor controllers are used at the facility. The complex proposed set measures allows to reduce costs and increase the stability work of the absorption column.
The results of the development of the automatic control system for the nitrogen oxide absorption apparatus are presented. The automatic adjustment
system is built on the basis of fuzzy logic. The proposed system is intended for use with modernized absorption units. The main functions of the control system are regulation of water and air flow. As a result of the operation of the automated control system, the concentration of nitrogen oxides in the tail gases stabilizes.The flow of air added to the unit is also optimized.
