The exergy analysis of energy efficiency of the technology of granulated phosphorus-potassium fertilizers

Authors

DOI:

https://doi.org/10.15587/1729-4061.2016.77182

Keywords:

phosphorus and potassium fertilizers, technological stages, exergy losses, energy efficiency, exergy performance efficiency

Abstract

The need for creating of complex mineral fertilizers was demonstrated, namely, granulated phosphorus and potassium fertilizers, which are a certain alternative to basic superphosphate. The advantages of the semi­dry method of granulation of phosphorus and potassium fertilizers were defined, which consist in the agglomeration of phosphorite powder with the help of the plasticizer based on the compounds of potassium at humidity of the charge not exceeding 12 %. The structural scheme of the technology of obtaining phosphorus and potassium fertilizers was presented with indication of the amounts and temperatures of material flows.

It was demonstrated that the technology of phosphate mineral fertilizers by the method of granulation of pulp and drying of granules possesses increased energy expenditures for their production. It is indicated that the technology of phosphorus and potassium fertilizers, obtained by the semi­dry method, is based on the fabrication of granules by the method of agglomeration, that is why we may expect that this technology will have lower energy consumption, and, therefore, the important question is the analysis of completeness of the use of supplied thermal energy to the main technological equipment, i. e., the exergy analysis.

We proposed the method of the exergy analysis of technology flows, which makes it possible, by the represented analytical dependences, to determine the exergy expenses and losses by each technological stage in the technology of phosphorus and potassium fertilizers. The summary exergy balance of the technology of phosphorus and potassium fertilizers is presented and analyzed. The comparison of energy costs for the production of phosphorus and potassium fertilizers and ammoniated superphosphate was carried out, as a result of which we demonstrated the decrease in the expenses when obtaining phosphorus and potassium fertilizers by 30 % in comparison to the widely used ammoniated superphosphate.

Author Biographies

Nikolay Yukhimenko, Sumy State University Rymskogo-Korsakova str., 2, Sumy, Ukraine, 40007

PhD, Associate Professor

Department of Processes and Equipment of Chemical and Petroleum-Refineries 

Sergey Vakal, SE “Sumy State Scientific Research Institute of Mineral Fertilizers and Pigments” Kharkivska str., 12 p/o, Sumy, Ukraine, 40030

PhD, Associate Professor, director

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Published

2016-10-30

How to Cite

Yukhimenko, N., & Vakal, S. (2016). The exergy analysis of energy efficiency of the technology of granulated phosphorus-potassium fertilizers. Eastern-European Journal of Enterprise Technologies, 5(6 (83), 4–10. https://doi.org/10.15587/1729-4061.2016.77182

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Section

Technology organic and inorganic substances