2 replies to this topic

[ChinmoyBasak]

We could not replicate the paper claims. It seems to us that the paper has tried to maximize the electricity generation.

 

Is it feasible to have steam turbine outlet at 0.8 Bar(a). And have a condenser after that?

 

Aspen plus gave us Dew point error which is obvious.

 

They claimed,

 

"The steam turbine assumed in this study is a conventional back-pressure/extraction turbine and a condensing turbine in dual casing configuration. The steam turbine consists of a high pressure (HP)turbine casing and a low pressure (LP) turbine casing separated bya generator. Both turbine sections work on the same, single shaft arrangement to the generator. HP steam from the recovery boilerand multi-fuel boiler is delivered to the HP turbine inlet at 505◦C and 103 bar(a).The HP turbine offers three different steam extraction points:intermediate pressure (IP) steam at 30 bar(a)/352◦C (mainly forsoot blowing), medium pressure (MP) steam at 13 bar(a)/200◦C(mainly for pulp mill processes) and LP steam at 4.2 bar(a)/154◦C(for miscellaneous pulp and board processes). In the LP turbine,0.8 bar(a) steam is extracted for preheating the boiler feed water.Excess LP steam is expanded and condensed at 0.03 bar(a). A simplified diagram of the steam turbine configuration is presented in Fig. 5." (Attached Figure.

 

Aspen Plus file attached  PPI_steam (1).bkp   199.52KB   2 downloads

 

Paper Link

 

Performance and costs of CCS in the pulp and paper industry part 1:Performance of amine-based post-combustion CO2captureKristin Onarheima,∗, Stanley Santosb, Petteri Kangasa, Ville HankalincaVTT Technical Research Centre of Finland Ltd., Espoo, FinlandbIEA Greenhouse Gas R&D Programme, Cheltenham, UKcÅF Consult Oy, Espoo, Finland

http://dx.doi.org/10...ggc.2017.02.008

 

 

 Capture.JPG   64.82KB   0 downloads

 

Appreciate your suggestion

[Bobby Strain]

You should use efficiency for each stage to match the temperatures given. Also, you must add a valve to the steam to each intermediate stage, and allow for some pressure loss. If you search for the controls for an extraction turbine, you will get a better understanding of how they work.

 

Bobby

[ChinmoyBasak]

You should use efficiency for each stage to match the temperatures given. Also, you must add a valve to the steam to each intermediate stage, and allow for some pressure loss. If you search for the controls for an extraction turbine, you will get a better understanding of how they work.

 

Bobby

 

Thank you Sir for your comment we are going to try accordingly.