Efficient ammonia absorption system in ammonia synthesis process and control method thereof

By combining a two-stage absorption tower with an intelligent control device, the problems of low ammonia absorption efficiency and poor stability in the ammonia synthesis process have been solved, achieving efficient ammonia absorption and stable system operation, and reducing energy consumption and production costs.

CN122032272APending Publication Date: 2026-05-15XIAN THERMAL POWER RES INST CO LTD +2
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Patent Information

Application Number
CN202610341256.1
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-03-19
Publication Date
2026-05-15

AI Technical Summary

Technical Problem

The existing ammonia absorption system in the ammonia synthesis process suffers from low absorption efficiency, poor operational stability, and inaccurate control. In particular, it is difficult to adapt to fluctuations in inlet flow rate and concentration, resulting in raw material waste and high energy consumption.

Method used

The system employs a two-stage absorption tower connected in series, combined with an intelligent control device, including pretreatment, rotary and atomizing spray heads, temperature, pressure and ammonia concentration sensors. By real-time monitoring and automatic adjustment of spray volume and heating power, it achieves efficient ammonia absorption and system stability.

Benefits of technology

It improved ammonia absorption efficiency to 99%, reduced ammonia content in exhaust gas, reduced absorbent consumption and energy consumption, ensured stable system operation and precise control, and reduced production costs.

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Abstract

The invention relates to the technical field of synthesis ammonia production, and discloses an efficient ammonia absorption system in a synthesis ammonia process and a control method thereof. The efficient ammonia absorption system comprises a pretreatment device, a primary absorption tower, a secondary absorption tower, a desorption tower and an intelligent control device which are connected in sequence, the pretreatment device is used for removing impurities and moisture in the ammonia-containing gas; the first-stage absorption tower and the second-stage absorption tower absorb ammonia gas by spraying absorption liquid, and the absorption liquid of the second-stage absorption tower can flow back to the first-stage absorption tower; the desorption tower desorbs the absorption liquid to recover ammonia gas, and the desorption liquid is recycled; the intelligent control device monitors and adjusts system parameters in real time. According to the control method of the system, automatic and accurate control over the ammonia absorption process is achieved, hysteresis and instability of manual operation are avoided, real-time response can be achieved according to changes of the gas inlet working conditions, it is ensured that the ammonia absorption efficiency stably reaches the standard, meanwhile, waste of energy and absorption liquid is avoided by adjusting the spraying amount and the heating power according to needs, and the energy-saving and environment-friendly effects are achieved. And the system operation cost is reduced.
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