Technique and apparatus for recycling volatile organic compounds of coating printing
US11273388B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 8, 2014 |
| Grant date | Mar 15, 2022 |
| Priority date | — |
| Expiry date | May 8, 2034 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB05B16/60
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
The present invention discloses an integrated new technique and apparatus for recycling volatile organic compounds of coating printing. The new technique collects a mixed gas of volatile organic compounds produced in the process of coating and drying of a coating machine with a volatiles collecting hood of coating machine, compresses and lead the mixed gas of volatile organic compounds into a condensation system for condensation; the obtained condensate enters a gas-liquid separator to obtain a coating solvent with high concentration; non-condensable lean gas enters a membrane separation and enrichment system to obtain a mixed gas of high concentration organic compounds after membrane separation and enrichment with a complete set of membrane assembly, and then returns to front of the condensation system to repeat the integrated technique. The separation membrane as claimed in the present invention has an extremely high permselectivity for volatile organic compounds of coating printing and can quickly enrich the volatile organic compounds. Recycling rate of volatile organic compounds of the apparatus may reach 90%, and the content of organic compounds in the tail gas emission after …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.