Control process for an ammonia manufacturing process

Details Control process for an ammonia manufacturing process Control process for an ammonia manufacturing process

1984-10-01

1985-10-08

Doll, John

Chemistry of inorganic compounds

Nitrogen or compound thereof

Ammonia or ammonium hydroxide

C01C 104

Patent

active

045459711

ABSTRACT:
In an ammonia manufacturing process, control of the hydrogen to nitrogen ratio for the feed to the ammonia synthesis reactor is accomplished by controlling the hydrogen to nitrogen ratio based on the ratio of hydrogen and carbon monoxide to nitrogen in the effluent withdrawn from the secondary reformer. Also, in an ammonia manufacturing process where parallel reformer trains are utilized, shifting of loading between the parallel reformer trains is accomplished using valve position control to override the control based on the ratio of hydrogen and carbon monoxide to nitrogen in the effluent withdrawn from the secondary reformer.

REFERENCES:
patent: 4088740 (1978-05-01), Gaines
patent: 4180858 (1979-12-01), Gaines et al.
patent: 4305918 (1981-12-01), Gaines

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