Dryer drainage by recirculation with primary and secondary dryers
US4447964A · kind A · utility
Inventor
Key dates
| Filing date | Nov 23, 1981 |
| Grant date | May 15, 1984 |
| Priority date | — |
| Expiry date | Nov 23, 2001 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD21F5/028
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A steam dryer system for drying a moving web and including a primary series of rotatable drying drums, steam inlet conduits coupled to said rotatable drying drums for introducing steam thereinto, outlet conduits coupled to said rotatable drying drums for exhausting blow-through steam with noncondensible gases and condensate therefrom, recirculation means including a steam jet compressor to recirculate blow-through steam from said outlet conduits back to said inlet conduits, recirculation control means comprising instruments to measure velocity pressure of the recirculation flow and to control the action of said jet compressor, a further number of secondary drying drums having inlet conduits and a pressure control valve connected to the outlet of said jet compressor and with outlet conduits connected to a condenser, and pressure control means comprising instruments to measure and control the input pressure in said secondary drying drums.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.