FI890295A - FOERFARANDE OCH ANORDNING FOER AOTERVINNING AV KEMIKALIER FRAON SVARTLUT. - Google Patents
FOERFARANDE OCH ANORDNING FOER AOTERVINNING AV KEMIKALIER FRAON SVARTLUT. Download PDFInfo
- Publication number
- FI890295A FI890295A FI890295A FI890295A FI890295A FI 890295 A FI890295 A FI 890295A FI 890295 A FI890295 A FI 890295A FI 890295 A FI890295 A FI 890295A FI 890295 A FI890295 A FI 890295A
- Authority
- FI
- Finland
- Prior art keywords
- melt
- pyrolysis
- carbon
- reaction zone
- soda ash
- Prior art date
Links
Abstract
The invention relates to a method and an arrangement for the pyrolysis of pulp spent liquor and reduction with carbonaceous material of a soda ash melt deriving from pyrolysis, through simultaneous heating and stirring of a mixture of the soda ash melt and the carbonaceous material in a reaction zone and removing gases and a melt product containing sodium oxide therefrom. According to the invention a soda ash mixture of hydrocarbons and carbon deriving from pyrolysis of black liquor is fed into 2 into the reaction zone A under the surface of a melt that is covered by a layer 14 of carbon in particulate form. At least part of the heat required by the reduction reaction is fed to the melt through the said carbon layer 14 through combustion of the carbon layer and the resulting increase in gases with oxygen or gas containing oxygen 13. Pyrolysis of the black liquor advantageously takes place in a separate, closed cyclone 1, which is connected below the surface of the melt, from which cyclone gases are removed 18 in a controlled manner 17, so that a gas pressure is obtained in the space 1, such that the products of pyrolysis are transferred at the desired rate to the reaction zone A. <IMAGE>
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FI890295A FI81139C (en) | 1988-01-20 | 1989-01-19 | Process and apparatus for the recovery of chemicals from black liquor |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FI880244 | 1988-01-20 | ||
FI880244A FI880244A0 (en) | 1988-01-20 | 1988-01-20 | FOERFARANDE OCH ANORDNING FOER AOTERVINNING AV KEMIKALIER FRAON SATRIUMKARBONATHALTIG SMAELTA FRAON FOERBRAENNING AV MASSAAVLUT. |
FI890295 | 1989-01-19 | ||
FI890295A FI81139C (en) | 1988-01-20 | 1989-01-19 | Process and apparatus for the recovery of chemicals from black liquor |
Publications (4)
Publication Number | Publication Date |
---|---|
FI890295A0 FI890295A0 (en) | 1989-01-19 |
FI890295A true FI890295A (en) | 1989-07-21 |
FI81139B FI81139B (en) | 1990-05-31 |
FI81139C FI81139C (en) | 1990-09-10 |
Family
ID=26158292
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FI890295A FI81139C (en) | 1988-01-20 | 1989-01-19 | Process and apparatus for the recovery of chemicals from black liquor |
Country Status (1)
Country | Link |
---|---|
FI (1) | FI81139C (en) |
-
1989
- 1989-01-19 FI FI890295A patent/FI81139C/en not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
FI81139C (en) | 1990-09-10 |
FI890295A0 (en) | 1989-01-19 |
FI81139B (en) | 1990-05-31 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
MM | Patent lapsed |
Owner name: TERAESBETONI OY |