Transcript 40 MTPD Crystalline Ammonium Nitrate Plant

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17A Marlen Drive w Hamilton, NJ 08691 w USA
Tel: (609) 586-8004 w Fax: (609) 586-0002
www.ippe.com
Introduction
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Built:
February 1977
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Shut Down:
June 2003
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Capacity:
300 MTD based on 100% NA
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Production:
60 % Nitric Acid
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Technology:
Chemico Process
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Revamped:
March 1990
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Documentation:
Available
Overview
Atmospheric air is filtered and compressed to about 9.5 kg/cm2. 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 ammoniaair mixer where air is mixed with the required amount of ammonia supplied to contractor’s battery limits at 14 kg/cm2
(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)
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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
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S.W. Gulfport
90 m2 surface area and a carbon steel shell with 304 stainless steel
tubes
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Industrial Fabricating Co.
304 stainless steel
Platinum Catalyst support
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3’ diameter by 30’ tall, 304L stainless steel
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Metalart Co.
12’ in diameter by 135’ tall, 304L stainless steel
Operating pressure is approx. 120 PSIG
Ammonia Burner
Bleaching Tower
Absorption Column
Major Components
Timeline of Replacements
November 1999
 Absorption Tower, Bottom
Part Replaced (below 19th stage)
1998
 Acid Condenser Replaced
1997
 Chiller Compressor Installment
 NH3 condenser, high receiver
 Oil separator, Oil cooler etc.
March 1990
 New Air Compressor Set
(inc. Expander & Steam Turbine)
 Chilled Water Unit
(Tank, Evaporator, (Refrigerant-NH3) etc)
 NOX 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: 609-838-5930 (direct)
Mobile: 609-516-9107
[email protected]