When supplied with adequate quantities of raw materials and utilities as specified, the plant shall be capable of producing:
Normal Operation Requirements
Production Steps in AN and AN-S
General Process Description
Ammonia and nitric acid are introduced to the wet section from battery limits. The ammonia, which is received as liquid, is vaporized and superheated in the ammonia evaporator (12E-101) and ammonia superheater (12E-106) and introduced to the neutralizer (12G-105). With the introduction of nitric acid into the neutralizer an exothermic reaction takes place. The exothermic reaction evaporates part of the water in the nitric acid. (The maximum concentration of ammonium nitrate obtained from this reaction is determined by the concentration of the acid used). A solution of approx. 75% AN is produced in the neutralizer at a pressure of approx. 2.3 psig, at 264°F. The steam produced from the reaction is partly used to evaporate and superheat ammonia. The remainder of the steam is condensed in the neutralizer overhead condenser (12E-105). The excess condensate is sent to battery limits for use elsewhere.
Steam - Saturated at 200 psig (min)
Electricity - 480 volts 3 phase H2
Cooling Tower Water: Temperature - 88°F (max) Pressure - 25 psig (min)
Instrument Air - Dry, Oil Free - Pressure - 60 psig (min)
Pressure: 75 psigTemperature: 100°FHNO3: 54 wt% (min) H2O: 46 wt% (max)HNO2: 0.05 wt% (max)
Pressure: 200 psig Temperature: 80°FNH3: 99.5 wt% (min)Oil: 5 ppm by wt (max)Moisture: 0.5 wt% (max)
Ammonium Sulfate (Dry Crystals):
Nitrogen: 21.0 wt% (min) Moisture: 0.1 wt% (max) Screen Analysis: 100% through US #10 mesh 15% through US #40 mesh (max)
Coating Agent (Diatomaceous Earth):
Moisture: 4 wt% (min)Screen Analysis: 98% through US #10 mesh 15% through US #40 mesh (max)
The ammonium nitrate-sulfate plant is capable of producing either prilled ammonium nitrate (mode 1 operation) or prilled ammonium nitrate-sulfate (mode 2 operation).
The ammonium nitrate-sulfate plant consists of two sections, namely, a wet section and a dry section. The wet section is designed to produce an aqueous solution of ammonium nitrate by the reaction between ammonia and nitric acid. This solution is concentrated in the wet section to produce either 99.7% AN as a melt, mode 1 operations of 95% AN as an aqueous solution, mode 2 operation. This concentrated product from the wet section is pumped to the dry section, where the AN is prilled.
The dry section is designed to produce prills and to condition these prills by drying, cooling, screening and coating to give a finished product ready for storage. Located in the dry section are the facilities for producing ammonium nitrate-sulfate.
The off specification AN and AN-S prills are separated from the production stream, and in mode 1 operation the off-spec AN prills are dissolved and pumped back to the wet section for reprocessing. In mode 2 operation the off-spec AN-S prills are recycled back in solid form and recycled.
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