Operating principles of NMP solvent recovery units
All of our solvent recovery units, besides being ecological devices that drastically reduce pollutants in the atmosphere, are also proper industrial plants.
What are the main elements of the recovery unit?
Emissions treatment plants for NMP recovery generally consist of three sections:
- Solvent recovery – Condenses the solvent into a liquid after emission by the coating machine. Hot air returned to the drying section of coating already provides some economic benefit. The condensed solvent, however, does not yet have the required purity characteristics to be directly reused in the coating process.
- Air purification – Limits to a minimum the quantities and concentrations of solvent emitted into the atmosphere. Thanks to one or more rotor concentrator units, emissions can reach below even 2 mg/Nm3 , and the recovery efficiency of the solvent increases.
- Distillation – Makes the solvent reusable in the production process. The purity characteristics required in this application are very high and therefore the process is not simple. Deep know-how and long experience are needed to achieve optimal results.
Typical applications and target sectors of NMP
NMP is a solvent that is used widely in the manufacture and production of electronics, petrochemical products, polymers and other specialty chemicals.