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Please click on our logo or any link in this presentation to be redirected to our website & . Thank You! 17A Marlen Drive Hamilton, NJ USA Tel: (609) Fax: (609)
Introduction Built:February 1977 Shut Down:June 2003 Capacity: 300 MTD based on 100% NA Production:60 % Nitric Acid Technology: Chemico Process Revamped: March 1990 Documentation: Available
Overview Atmospheric air is filtered and compressed to about 9.5 kg/cm 2. Intercooling in the air compression system is adjusted to produce hot compressed air at 232° C. Primary air, about 80% of the total compressed air passes through a compressed air filter and enters the ammonia- air mixer where air is mixed with the required amount of ammonia supplied to contractors battery limits at 14 kg/cm 2 (min.) and 32° C. The ammonia-air mixture flows from the mixer to the burner assembly which contains a set of platinum-rhodium gauzes. The oxidation of ammonia to nitric oxide takes place at the gauze. The resulting hot gases leave the gauze at approximately 900° C and flow around the tubes of the turbine gas heater and through the tubes of the burner gas boiler, generating steam. The cooled product gases leave the boiler and flow through a catalyst recovery filter, tail gas heater, boiler feedwater heater, nitric gas cooler and water cooled weak acid condenser. Acid collected in the latter unit flows to the proper tray of the absorption tower while the uncondensed process gas flows directly to the lower part of the tower where it is mixed with air from the bleaching section. Hot secondary air from the air compression system (the remaining 20% of the compressed air) is cooled by exchange with tail gas and flows to the bottom section of the absorption tower to bleach the product acid before mixing with the process gas. Make-up water is pumped from the condensate tank to the top of the absorption tower, and the acid produced in the absorber passes through the bottom bleaching section where it is stripped of nitrous acid by the warm secondary air. The product acid flows to the nitric acid storage tank under system pressure. The absorption tower is designed to recover almost all the nitrogen oxides present, yielding a tail gas containing about 250 ppm by volume. The tail gas flows through the tail gas mist separator at the top of the absorption tower and then through a reheating cycle. The gas is first heated by the bleaching air in the bleach air cooler, by steam in the tail gas preheater and by exchange with the process gas in the tail gas heater and turbine gas heater. The hot tail gas then enters the power recovery turbine of the air compression system, furnishing most of the normal compression power. The remaining power required is furnished by a steam turbine.
Major Components Equipment Air Compressor Train (2) 1 Turbodyne steam turbine drive with expander and a four stage Dresser-Clark air compressor 1 Turbodyne steam turbine drive with expander and a four state Ingersoll-Rand air compressorElectrical motor driven, Lufkin gear box Ammonia Evaporator S.W. Gulfport 90 m 2 surface area and a carbon steel shell with 304 stainless steel tubes Ammonia Burner Industrial Fabricating Co. 304 stainless steel Platinum Catalyst support Bleaching Tower 3 diameter by 30 tall, 304L stainless steel Absorption Column Metalart Co. 12 in diameter by 135 tall, 304L stainless steel Operating pressure is approx. 120 PSIG
Major Components Timeline of Replacements November 1999 Absorption Tower, Bottom Part Replaced (below 19 th stage) 1997 Chiller Compressor Installment NH 3 condenser, high receiver Oil separator, Oil cooler etc Acid Condenser Replaced March 1990 New Air Compressor Set (inc. Expander & Steam Turbine) Chilled Water Unit (Tank, Evaporator, (Refrigerant-NH 3 ) etc) NO X Abator (SCR) etc.
Major Components Spare Parts (Air Compressor Train) Air Compressor (Old) Steam Turbine Expander Air Compressor (New) * A detailed and completed list of all equipment are available and to be provided on demand
Contact Information MICHAEL JOACHIM VP GLOBAL PLANT SALES Tele: (direct) Mobile:
Detailed Report Utility & Unit Consumption Ammonia Power Boiler feed water Cooling water 70° F - 85° F Steam (credit) export Platinum, net burnt Total catalyst weight NOx emissions Maximum of 200 ppm