Method and apparatus for feeding a chemical into a liquid flow
US7234857B2 · kind B2 · utility
6Cited by
44References
24Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Apr 23, 2002 |
| Grant date | Jun 26, 2007 |
| Priority date | — |
| Expiry date | Jul 6, 2022 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/87652
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A method of and apparatus for feeding a chemical into a liquid flow are especially suited for use with a headbox of a paper machine, particularly for feeding a retention aid into a fiber suspension flow going to the headbox so that in a mixing apparatus feed liquid is added into the retention chemical solution, prior to introducing the solution into the fiber suspension flow guided to the paper machine. The feed liquid is preferably a circulation water from the paper mill, or another non-clean liquid from a paper mill.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.