Copyright P T Reid @ Green Equipment Ltd 2021
Registered In England No: 4759703
VAT Number: 824777106
Solvent Recycling Principles
There are three general types of solvent recovery unit.
Simple dry distillation, fractional distillation and thin film evaporation.
During the distillation process, solvents contaminated with pigments, resins, polymers, paints, oils, etc... are heated in a chamber (distillation column) by electric heaters, steam or thermal oil.
When the solvent has reached it's boiling point (this varies with different solvents), vapour is produced which is then condensed through a heat exchanger (condenser).
The vapour is condensed back into a liquid as it passes through the condenser and collected in a storage container.
The residues remaining in the distillation column are drained and disposed of as waste.
Distillation units can be batch or continuous operation with automatic feeding of contaminated solvent and draining of waste residue.
They can be used with vacuum assistance when high boiling point solvents are processed or solvents containing heat sensitive chemicals such as Nitrocellulose used in printing inks.
Distillation is defined as a process in which a liquid
mixture of two or more substances is separated into
it's component fractions of desired purity, by the
application and removal of heat.
Industrial Washing Machines
Washing and cleaning systems can either use solvents or aqueous based solutions depending on what is being cleaned. In either case, dirty solvents or water can be recycled and used again when recycled with an in-line recovery unit.
There are different principles involved such as immersion, high pressure spray with or without brushing, vapour degreasing etc...
Various cycles of washing are available to suit components being cleaned. This can include pre-wash, wash, pre-rinse, rinse and drying followed by recovery of washing medium.
Washing machines can vary in size and have different loading capabilities such as top loading, side loading and end loading.
The main advantages of automatic machine washing compared to manual hand cleaning would be:
- reduced operator contact with chemicals
- reduced respiratory exposure to chemicals
- no open tanks of flammable solvents
- using less cleaning chemicals
- lower labour costs
- consistently cleaner parts
- reduced downtime of production equipment.
When using washing machines with in-line recycling
units, dirty solvent and waste water can be recycled
to be used again.
Solvent Recycling - Industrial Washing - Electrical Appliance Testing - Sales - Service
01244 374205 or 07939 056170