AMMONIA PLANT WITH OXYFUEL COMBUSTION AND CARBON DIOXIDE CAPTURE Russian patent published in 2022 - IPC C01C1/04 C01B3/32 

FIELD: ammonia production.

SUBSTANCE: invention can be used in the production of ammonia from hydrocarbon feedstock. In the ammonia production unit, the first outlet of the natural gas purification unit 1 is connected to the first inlet of the combustion chamber 7, and the second outlet to the compressor 2, the outlet of which is connected to the inlet of the cold gas circuit of the coolant 5 of the first surface heat exchanger 3. The pump outlet 16 is connected in series with the inlets of cold water coolant circuits 14 and 12 of the third 13 and second 10 surface heat exchangers. The outlet of the cold gas circuit of the coolant 5 of the first surface heat exchanger 3 and the outlet of the cold water circuit of the coolant 12 of the second surface heat exchanger 10 are connected in parallel with the first inlet of the steam reformer 6, the first outlet of which is connected in series with the hot gas circuits of the coolant 4 and 11 of the first 3 and second 10 surface heat exchangers , cooler 19, high-temperature conversion reactor 20, condenser 21 and short-cycle adsorber 22, the first outlet of which is connected to the inlet of the ammonia synthesis unit 23, and the second outlet is connected to the second inlet of the combustion chamber 7. The outlet of the air compressor 9 is connected to the inlet of the air separation unit 8, the first outlet of which is connected to the third inlet of the combustion chamber 7, and the second outlet is connected to the inlet of the ammonia synthesis unit 23. The outlet of the combustion chamber 7 is connected to the second inlet of the steam reformer 6, the second outlet of which is connected to hot gas circuit of the coolant 15 of the third surface heat exchanger 13, which is connected to the cooler-separator 17, the first outlet of which is configured to drain water. The second outlet of the cooler-separator 17 is connected in parallel with a multi-stage compressor with intermediate cooling 18 and the fourth inlet to the combustion chamber 7. The outlet of the ammonia synthesis unit 23 is connected to the inlet of the ammonia liquefaction unit 24.

EFFECT: invention allows to reduce CO₂ emissions and carbon footprint during ammonia production.

1 cl, 1 dwg