Mass Integration in Acrolynitrile plant

Labor Umwelttechnik und Recycling

Flowsheet of Acrylonitrile Plant

Technical Constraints

Targets for new Wastewater Streams

Overall water balance before and after mass integration

Application of different Mass ExchangersS1: Air-StrippingS2: Adsorption with activated CarbonS3: Adsorption with Resins

Segregation, Interception and recycle

Source-Sink Mapping

Direct Recycle opportunities

Interception and recycling opportunities

Flowsheet of the Optimal Solution - 1

Flowsheet of the Optimal Solution - 2

Comparison of the results

Output Characteristics Without Wastewater Reuse

Wastewater Reuse Model 1

Wastewater ReuseModel 2

Fresh water feed required 7,2 kg/s 2,2 kg/s 0 kg/s

Acrylonitrile in product stream

3,9 kg/s 4,4 kg/s 4,6 kg/s

Flow rate to treatment 13,1 kg/s 7,7 kg/s 5,0 kg/s

Mass fraction acrylonitrilein stream sent to treatment

0,092 0,078 0,083

Concentration of ammonia in stream sent to treatment

20 ppm 35 ppm 25 ppm

Concentration of ammonia in product stream

1 ppm 2 ppm 1 ppm

Impact diagrams (Pareto Charts) for the reduction of wasteater and the associated

total annual costs (TAC)