Nitric Acid Technologies

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Nitric Acid Technologies

Modernization and construction of nitric acid production units

Modernization of large-scale non-concentrated nitric acid production units AK-72

The proposed modernization affects the main stages of the production process and includes the following:

PFD for modernized non-concentrated nitric acid production plant

Legend:
РCО – DeNOx reactor Э/дв – electric motor
ПВГ-1,2 – off-gases heater КСТ – gas turbine combustion chamber
ВКД – air compressor ГТТ-12 – gas turbine unit
ВОХ – air cooler

NIIK’s services for modernization of large- scale nitric acid unit (AK-72):

The modernization of the existing AK- 72M unit was carried out for Minudobreniya Company (Rossosh, Russian Federation) in 2014.

The nitric acid production capacity was increased by 20%, natural gas consumption was reduced by 50%, steam production by 15% as compared to the AK-72M design values.

 

MODERNIZATION OF THE EXISTING NON- CONCENTRATED NITRICACID PRODUCTION UNIT UKL-7

The suggested modernization of the existing nitric acid production unit UKL-7 results in:

Main technical solutions on modernization of the existing UKL-7 units:

PFD for modernized non–concentrated nitric acid production unit UKL- 7

Legend :
КА – contact reactor АК – absorption column
КУН – LP waste- heat boiler ПК – blowdown column
ПВз – air heater РCО –DeNOx reactor
ПХГ-1,2– tail gas preheater ЭК – tail gas waist heat boiler
ХК-1,2 – cooler condensers ГТТ-3М – gas turbine unit

NIIK’ s services for revamps of existing NA units (UKL-7)

 

NITRIC ACID PRODUCTION UNITS UKL-7-76М WITH CAPACITY 130 000 TPY

The basis of nitric acid production reaction is catalytic oxidizing of ammonium by atmospheric oxygen and absorption of nitrogen oxides at absolute pressure 0,73 МPа.

New technical solutions:

The gas turbine unit is characterized by reduced metal consumption and expanded services hours.

Nitric unit production unit UKL -7-76М technical performance

Parameter Unit UKL-7-76М
1 HNO3 monohydrate output TPH 16,0
2 Natural gas consumption m3/t 75.0
3 Ammonia consumption kg/t 296.0
4 Steam production for the plant needs Р 1,6 МPа Gkal/t 1,25
5 Power consumption kWh/t 20
6 Cooling water consumption m3/t 130

PFD for non concentrated nitric acid production unit UKL-7-76M (capacity 130 000 TPY HNO3 monohydrate)

Legend:

КА – contact reactor ПК – blowdown column
КУН– LP waste- heat boiler РCО – DeNOx reactor
ПХГ-1,2– tail gas preheater КУГ – recovery boiler
ХК-1,2 – cooler condensers ЭК – tail gas waist heat boiler
АК – absorption column ГТКТ-4 – turbo compressor unit

NITRIC ACID PROJECTS REFERENCES