Diseño de una planta para la recuperación de alcohol metílico y de polietilenglicol de soluciones de desecho provenientes del proceso de preservación de rosas

Abstract

The objectives of this project are basic and conceptual design a polyethyleneglycol (PEG) and methanol recovery plant with a concentration of 93% (m/m) for reinserting into the productive process based on two different waste solutions resulting from preserved roses process and the conditioning roses process. For the PEG recovery process is proposed the preliminary stages are conditioning at pH 4.0 and cooling at 10 ° C, the cutting membrane of the ultrafiltration process corresponds to 30 kDa. 5,65 kg PEG per batch is the recovery of this process. The methanol recovery process was to design a batch distillation tower. The tower is 0,23 m of diameter and six stages. A series of perforated stainless-steel trays are used to promote mixing between the gas and liquid. 270,00 kg methanol over 93 % (m/m) per batch recovered from the process, to achieve the operating conditions of the temperature at the top of the column should be 61,5 ° C. The investment of the implementation of the methanol and polyethylene glycol recovery plant during the first year is 69 559,16 USD. Cost of treating a kilogram of waste solution is 0.27 USD and represents an annual saving for the company of 65 426,00 USD. A return on investment is about 137 batch operation, in addition to increasing productivity and improving the environmental management of the company.