A system for the combined production of ammonia and nitric acid based on steam electrolysis

Abstract

The invention belongs to the technical field of chemical industry, and in particular relates to a system for jointly producing ammonia and nitric acid based on steam electrolysis, which consists of a nitrogen production unit, an ammonia synthesis unit, a nitric acid production unit and a solid oxide electrolytic cell. The present invention utilizes the synthetic ammonia unit to provide raw material ammonia and process steam for the nitric acid production unit, the nitric acid production unit does not need to purchase ammonia, and simultaneously omits the waste heat boiler; the present invention utilizes the reaction heat of the synthetic ammonia unit and the nitric acid production unit to generate high-temperature steam for solid oxidation The hydrogen and oxygen generated by the solid oxide electrolyzer are applied to the ammonia synthesis unit and the nitric acid production unit, thereby realizing the joint production mode of ammonia and nitric acid with air and water as raw materials; the present invention does not need to purchase raw materials and fuels, only It needs to use electric energy, and has the characteristics of high integration, low production cost, single and convenient energy consumption, reasonable energy recovery and utilization, little environmental pollution, and compliance with international emission standards. It has good economic benefits and good application prospects.

Description

technical field [0001] The invention belongs to the technical field of chemical industry, and in particular relates to a system for jointly producing ammonia and nitric acid based on a steam electrolysis method. Background technique [0002] Synthetic ammonia is a basic chemical raw material, which can be used to produce dyes, pharmaceuticals, synthetic fibers and synthetic resins, etc. It is also a raw material for the nitric acid industry. The production of synthetic ammonia and nitric acid ranks first in the world. Since the ammonia synthesis process and the nitric acid production process are relatively complicated at the present stage, and there is no correlation between the two processes, an independent ammonia synthesis enterprise and a nitric acid enterprise are formed respectively, and the ammonia synthesis enterprise provides the raw material ammonia for the nitric acid enterprise. In recent years, with the growth of downstream demand such as metallurgy and medicin...

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