FI890295A - FOERFARANDE OCH ANORDNING FOER AOTERVINNING AV KEMIKALIER FRAON SVARTLUT. - Google Patents

FOERFARANDE OCH ANORDNING FOER AOTERVINNING AV KEMIKALIER FRAON SVARTLUT. Download PDF

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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
Application number
FI890295A
Other languages
Finnish (fi)
Other versions
FI81139C (en
FI890295A0 (en
FI81139B (en
Inventor
Rolf Malmstroem
Original Assignee
Teraesbetoni Oy
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from FI880244A external-priority patent/FI880244A0/en
Application filed by Teraesbetoni Oy filed Critical Teraesbetoni Oy
Priority to FI890295A priority Critical patent/FI81139C/en
Publication of FI890295A0 publication Critical patent/FI890295A0/en
Publication of FI890295A publication Critical patent/FI890295A/en
Application granted granted Critical
Publication of FI81139B publication Critical patent/FI81139B/en
Publication of FI81139C publication Critical patent/FI81139C/en

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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>
FI890295A 1988-01-20 1989-01-19 Process and apparatus for the recovery of chemicals from black liquor FI81139C (en)

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)

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