Study-Amendments to Part

Following the detailed equipment design, a few amendments need to be made to the information presented in Part I of the Design Project Report (Case Study). The two main areas needing amendment are detailed as follows. 

Mass Balance around the Absorption Column The mass balance around this unit was refined due to the availability of better chemical equilibrium data (Ref. Al, see Chapter 9). This data predicted that the dissolved gas concentration in the red product acid stream flowing from the column would in fact be of lower concentration than initially thought, and the dissolved gas component tended to be nitrogen monoxide and dioxide rather than nitrogen tetroxide. Therefore, 

Equipment Costs Due to the availability of more complete information regarding the type of equipment required, several costs are revised. 

Absorption column Steam superheater Bleaching column delivery tank Nitric acid storage tank 

Note Chapters 9 to 12 contain case study material for the detailed design of equipment for the nitric acid plant. There are no accompanying text notes. References are included at the end of each chapter. Details of the calculations performed and additional information are included in Appendices G to J. 

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