What are the international technologies for ammonia production

Currently, the international coal as raw material ammonia production gasification process using pressurized continuous gasification, mainly Ruchi furnace, Texaco furnace, Shell furnace; purification process using sulfur-resistant conversion, low-temperature methanol wash desulfurization and decarburization, low-temperature liquid nitrogen wash purification process; synthesis using low-pressure synthesis; compression of centrifugal compressors are used.

The technical progress of ammonia synthesis is mainly manifested in the large-scale device and energy saving, in order to reduce the construction investment per unit of product and production costs, to obtain the maximum economic benefits.

The single series production scale of ammonia synthesis plant from the early 1950s 200 tons per day to the 1960s 1000 tons per day has developed to more than 2000 tons per day.

The energy consumption of ammonia synthesis is very much related to the raw materials used, investment and scale. Large-scale plant to natural gas as raw material, using the conversion process, the ton of ammonia energy consumption of 28GJ, to fuel oil and coal coke as raw material, using part of the oxidation process, the ton of ammonia energy consumption of 38GJ and 48GJ. to the 1990s to coal as raw material for large-scale ammonia synthesis plant ton of ammonia energy consumption down to 46.05GJ ~ 50.24GJ.

At present, the world's new urea plant is mainly used in ammonia gas extraction method, ACES method and CO2 gas extraction method.