«Proceedings of Gubkin University»

Development of recommendations for improving design and technology of operation of pyrolysis furnaces for conversion of natural ethane-containing gas into ethylene

UDC: 66.092-977
DOI: 10.33285/2073-9028-2023-4(313)-128-142

Authors:

¹ Ukhta State Technical University, Ukhta, Russian Federation
² National University of Oil and Gas “Gubkin University”, Moscow, Russian Federation

Keywords: pyrolysis, pyrolysis furnace, gas processing, construction, coil, ethylene, technology

Annotation:

The article presents the results of theoretical research and analytical studies aimed at improving the design and technology of operation of pyrolysis furnaces for the conversion of natural ethane-containing gas into ethylene. As a result of the work, the lengths of the pyrolysis furnace coil corresponding to the maximum ethylene yield under various technological conditions were determined. It was found that the ratio of C2H6/H2O components in the range from 1 to 2 leads to an increase in ethylene yield up to 8 %. An increase in the pressure of the mixture to the level of 0,200–0,295 MPa, in the ratio raw materials – steam H2O = 1 relative to the base, does not lead to a significant increase in the yield of the target product. At a mixture pressure of 0,200–0,295 MPa, in the ratio raw material – steam H2O = 1,5 relative to the base, there is a positive dynamics of ethylene yield and a decrease in the required length of the coil. It is shown that the formation of ethylene occurs much faster than in the initial mode, and its highest concentration is already achieved at the coil length of 80 m, which is 3 m less than the base version. However, at a mixture pressure of 0,295 MPa, in the ratio raw materials – steam H2O = 2 relative to the base, an ethylene yield of 32,3 % is established, but for this technology the required length of the coil increases to 9 m relative to the base version and is 92 m, which leads to increased heating costs. Thus, the technical and technological solutions proposed in the work to improve the design and technology of operation of pyrolysis furnaces will increase the efficiency of the technological process of converting natural ethane-containing gas into ethylene.

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