Solvent recovery
Characteristics of the project
Design, selection of equipment, installation and operation is assumed in compliance with the requirements of the ATEX directives - Directive 1999/92 /EC (intended for operators) and 2014/34 /EU (intended for manufacturers and their products). ATEX directive for manufacturers and their products 2014/34 /EU
The selected technological scheme for the regeneration of the solvent provides for the isolation of water and dry organic substances from it by distillation (strengthening) to certain concentration and quality indicators.
The unregenerated solvent is pumped to the tray (feed tray) of the regeneration column, in which the stripping process takes place (removal of ethanol and oxygen-containing compounds). The vapors enriched in a readily volatile component (VLC) are fed to a heat exchanger for their complete condensation, forming a distillate. Heat exchanger 2 acts as a trap to prevent the loss of LLK with non-condensed gases. The distillate formed is fed to the reflux tank. To prevent losses of LLK from the collection, they are fed to the heat exchanger. The distillate formed in the reflux tank is fed. From the bottom of the regeneration column, distillation residue is removed, which is pumped into the sewer. Heating of the regeneration column is carried out through a state-steam boiler with forced circulation of the bottom residue. A centrifugal pump is installed for circulation. To maintain the concentration of the distillate within the specified limits on the upper tray of the regeneration column, a pump is used to supply a certain amount of distillate of the column vapor. From the reflux collector, a pump is used to select the regenerated solvent, which is returned back to the main production.
Before entering the feed plate of the regeneration column, and not the regenerated solvent, it is heated to a predetermined temperature in plate heat exchangers with the regenerated solvent from the reflux collector). (Distillation residue from the bottom of the regeneration column), respectively. The recovered solvent is cooled to a predetermined temperature in plate heat exchangers, (non-recovered solvent) (propylene glycol from the chiller), respectively.
To heat the columns with a pair, a gost-steam collector is installed pos. All steam condensate that forms in the boiler is returned to the boiler room.
Cooling water is supplied to all heat exchangers from the return water pressure header, and it is discharged through the return water collection header.
A collector of artesian water was installed for the preparation of CIP solutions and flushing of equipment.
Pectin - a water-soluble substance contained in the cell juice of fruits and vegetables. It has important biological properties. It contains free hydrocarboxyl groups of galacturonic acid, which are able to bind heavy metals into insoluble complexes with subsequent excretion from the human body. It is used for the production of jams, marmalade, pastilles, preserves, marmalades, as well as for increasing the viscosity of juices.
When processing apples, a lot of nutrients get into juice with pomace. 20% of the pomace is processed into pectin. The pomace is crushed and transferred to the extractor. Soluble substances are extracted in the extractor with hot water acidified with sulfurous acid. After separation, the solid fraction is pressed, and the liquid fraction is treated with enzyme preparations. Next, the resulting pectin solution is precipitated with 95% ethyl alcohol acidified with hydrochloric acid. The formed pectin precipitate is filtered, dried and crushed. The filtered ethanol solution is recovered for reuse.
BTS-engineering company a unit for the regeneration of ethyl alcohol in the production of pectin of TV-FRUT LLC was developed and installed. The solvent (ethanol) recovery unit is an element of the pectin production line from the waste of the apple juice (concentrate) production line. The selected technological scheme for the regeneration of the solvent provides for the separation of water and dry organic substances from it by distillation (strengthening) to certain indicators of the concentration and quality of ethanol.
