Pulp mill recovery system
US4011129A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 11, 1975 |
| Grant date | Mar 8, 1977 |
| Priority date | — |
| Expiry date | Apr 11, 1995 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD21C11/12
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A method of increasing the chemical recovery capacity of a Kraft Recovery Furnace by injecting solid pellets of sodium sulphate and sodium carbonate directly onto the char bed in the reducing zone of the furnace while maintaining the temperature and reducing atmosphere in this zone thereby to form a smelt containing sodium sulphide and sodium carbonate from the injected pellets. These pellets may be produced from a further quantity of balck liquor in an auxiliarly incinerator such as a fluid bed combustion unit. This invention permits increasing the recovery capacity of a furnace without necessitating the construction of a new Recovery Furnace.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.