Method for recycling of ammonia synthesis shift stripper condensate

By employing cooling, diversion, ammonia absorption and concentration, and carbonization reaction steps, the resource waste and high energy consumption problems of the condensate from the ammonia conversion stripping tower are solved, achieving efficient recovery and generation of high-value ammonium bicarbonate products, thereby improving resource utilization and economic benefits.

CN122144762APending Publication Date: 2026-06-05ANHUI HUAERTAI CHEM IND
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
ANHUI HUAERTAI CHEM IND
Filing Date
2026-01-26
Publication Date
2026-06-05

AI Technical Summary

Technical Problem

The existing methods for treating the condensate from the ammonia conversion stripping tower result in the waste of water and ammonia resources, high energy consumption, and cannot be effectively integrated with existing ammonia production processes, thus failing to efficiently recover and utilize ammonia resources.

Method used

By employing steps such as cooling, diversion, ammonia absorption and concentration, and carbonization reaction, waste ammonia gas from the synthetic ammonia cooler is used as the ammonia source. The condensate is efficiently recovered through a shell-and-tube cooler, an air heat exchanger, and a carbonization tower to generate high-value ammonium bicarbonate products.

Benefits of technology

It achieves efficient recovery of water and ammonia resources in condensate, with high resource utilization, low energy consumption, significant environmental benefits, outstanding economic benefits, strong process compatibility, and easy industrial promotion.

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Abstract

The application discloses a recycling method of condensate of ammonia shift stripping tower, comprising the following steps: S1 condensate cooling: hot condensate with a temperature of 80-100 DEG C is led out from the lower part of the ammonia shift stripping tower; S2 split delivery: the cooled condensate is divided into two routes by a condensate pump: the first route is sent to a synthetic gas washing tower to replace fresh desalted water for cooling and demisting of the synthetic gas, and fresh water consumption is reduced; the second route is sent to a carbonization mother liquor tank; S3 ammonia absorption concentration: the ammonia absorption pump is used to deliver the ammonia absorption mother liquor in the carbonization mother liquor tank to a high ammonia absorber; S4 concentrated ammonia water cooling: the concentrated ammonia water after concentration is sent into an air-cooled heat exchanger; S5 carbonization reaction product: ammonia in the concentrated ammonia water reacts with carbon dioxide to generate ammonium bicarbonate crystals, and ammonium bicarbonate products are obtained after separation and drying. The whole recycling process can be directly connected with the existing ammonia production system, the existing equipment does not need large-scale modification, the investment cost is low, and the industrialization popularization is easy.
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