Patent ID: 11905172
Assignee: YARA INTERNATIONAL ASA
Field: Chemical engineering (Chemistry)
Classification: CPC C  B  F  Y | IPC B  C  F

Claim 19:
20. The nitric acid production system according to claim 17, further comprising at least one of the following units:
an electrolysis unit, configured for decomposing water in H2 and O2 by means of an electrical current, the electrolysis unit comprising a water inlet and an H2 outlet and a O2 outlet; wherein the H2 outlet of the electrolysis unit is in fluid connection with the H2 inlet (710) of the Haber-Bosch synthesis loop (700);
an air separation unit, configured for the separation of air into O2 and N2, the air separation unit comprising an O2 outlet and a N2 outlet, wherein the O2 outlet of the air separation unit is in fluid connection with the oxygen supply line, and wherein the N2 outlet of the air separation unit is in fluid connection with the N2 inlet of the Haber-Bosch synthesis loop;
at least one heat exchanger, configured for capturing the waste heat from the ammonia combustion process, and a condenser for condensing the water in the ammonia combustion gas, wherein the at least one heat exchanger and condenser are situated downstream of the ammonia burner and upstream of the absorber unit;
a mixing unit in fluid connection and linked with the ammonia supply line and the oxygen containing fluid supply line, the mixing unit comprising a vessel, pipe or a reactor configured to mix the oxygen containing fluid and the ammonia to form a combustion mixture, prior to the introduction of the combustion mixture to the ammonia burner;
a means for pressurizing the liquid N2 in the N2 supply line to a pressure of at least 100 bara; and/or
a second turbine configured for expanding the ammonia stream separated in the separator.