During the execution of the first stage of energy-technological audit, the Insurer identified insufficient diameters of the communication lines for the discharge of fermentation gases from the fermentation vessels to the collector.
The resistance of the communication lines for fermentation gases was so HIGH that there was BACKPRESSURE of fermentation gases in the fermentation vessels. The excess of carbon dioxide gas suppresses the viability of yeast cells and reduces the ethanol yield from the mash.
The Insurer considers it EXTREMELY NECESSARY to expand the communication lines for fermentation gases to "release" the gases and prevent the pressure in the fermentation vessels from exceeding atmospheric pressure.
The reconstruction of the fermentation gas communication lines MUST be carried out simultaneously with the reconstruction of the rectifier K-201 with a diameter of 600 mm, as the current rectifier does not ensure a "free" release of fermentation gases into the atmosphere. Due to the high velocity in the cross-section of the trap, the necessary effect of ethanol vapor retention is evidently not achieved; they are discharged into the atmosphere, which increases non-productive ethanol losses.
The implementation of this measure should be preceded by the development of project and engineering documentation, including the reconstruction of the rectifier. According to preliminary calculations, the necessary effect of ethanol vapor retention in the exiting fermentation gases will be achieved by adding an additional section to the trap, which should be equipped with 10 EDV® valve trays with a diameter of 1200 mm and a tray spacing of 250 mm.
The investment volume for the implementation of this measure is calculated based on analogous projects.
The implementation of the proposed measure in conjunction with the implementation of measure 7.1.7 will reduce the fermentation time to 72 hours, which guarantees the attainment of "unaccounted" economic effect.
