Measure reconstruction of contact devices of distillation column is rather conditionally referred to the 1st group. For cost-effectiveness analyses of the measure, the information of Contractor’s staff about the necessity of column stop, in order to provide the cleaning of operated contact devices, is taken into account. Frequency of such stop is accomplished once in 2… 3 weeks, with cycle time including:
takes about one day. Consequently, even under the maximum lasting period of between cleaning of contact devices, the period of distillation column continuous run decreases from the estimated 330 days per year up to 314 days, or by a factor of 5.1%.
Ethanol production decreases by to the same value, namely by 840.4 m3 of dehydrated ethanol; the cost of “unreleased” ethanol as a result of idle time due to contact devices cleaning is 420,180.00 EUR per year.
EDV® valve-type trays, widely operated on ethanol plants of Ukraine and Lithuanian distillation columns, DO NOT REQUIRE such often stops for cleaning. Regulated operating time of the column without stops makes up 1 YEAR. Consequently, the economic benefit of distillation column reconstruction will reach not less than 420,180.00 EUR per year. The following features of the column after the reconstruction should refer to positive ones:
Technical and commercial offer for the contact devices delivery in the perspective of distillation column reconstruction dated from 2014-07-14 is shown in Appendices. All the characteristics of suggested contact devices are listed there, including their cost price and operation warranty of engineering design documentation for column reconstruction.
Consequently, the volume of additional investment in reconstruction of distillation column has to include nothing but:
