DE406172C - Process for the recovery of the free sulfur dioxide contained in sulphite waste liquors from pulp production - Google Patents

Process for the recovery of the free sulfur dioxide contained in sulphite waste liquors from pulp production

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Publication number
DE406172C
DE406172C DEK87117D DEK0087117D DE406172C DE 406172 C DE406172 C DE 406172C DE K87117 D DEK87117 D DE K87117D DE K0087117 D DEK0087117 D DE K0087117D DE 406172 C DE406172 C DE 406172C
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DE
Germany
Prior art keywords
sulfur dioxide
recovery
waste liquors
pulp production
free sulfur
Prior art date
Legal status (The legal status 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 status listed.)
Expired
Application number
DEK87117D
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German (de)
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Individual
Original Assignee
Individual
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
Application filed by Individual filed Critical Individual
Priority to DEK87117D priority Critical patent/DE406172C/en
Application granted granted Critical
Publication of DE406172C publication Critical patent/DE406172C/en
Expired legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
    • D21C11/00—Regeneration of pulp liquors or effluent waste waters
    • D21C11/06—Treatment of pulp gases; Recovery of the heat content of the gases; Treatment of gases arising from various sources in pulp and paper mills; Regeneration of gaseous SO2, e.g. arising from liquors containing sulfur compounds

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Description

DEUTSCHES REICHGERMAN EMPIRE

AUSGEGEBEN AM 20. NOVEMBER 1924ISSUED ON NOVEMBER 20, 1924

REICHSPATENTAMTREICH PATENT OFFICE

PATENTSCHRIFTPATENT LETTERING

KLASSE 55 b GRUPPE 3CLASS 55 b GROUP 3

Paul Knichalik in Magdeburg.Paul Knichalik in Magdeburg.

Verfahren zur Rückgewinnung des in Sulfitablaugen der Zellstoff gewinnung enthaltenen freien Schwefeldioxyds.Process for the recovery of the pulp in sulphite waste liquors contained free sulfur dioxide.

Patentiert im Deutschen Reiche vom 14. September 1923 ab.Patented in the German Empire on September 14, 1923.

Bei der Sulfitzellstoffgewinnung macht die Rückgewinnung des freien Schwefeldioxyds aus der beim Kochprozeß entstehenden Ablauge Schwierigkeiten. Gemäß der Erfindung gelingt es nun, dieses SchwefeldioxydIn sulphite pulp production, the free sulfur dioxide is recovered difficulties arising from the spent liquor during the cooking process. According to the invention now succeeds in this sulfur dioxide

Kalkwasser oder Frischwasser vollständig niederzuschlagen, wenn man für eine genügende, andauernde und innige Berührung zwischen der Niederschlagsflüssigkeit und der SO2-Gase sorgt. Am besten geschieht dieTo condense lime water or fresh water completely, if one ensures a sufficient, lasting and intimate contact between the precipitation liquid and the SO 2 gases. It is best done

Niederschlagung in einer Kolonne, die von oben her mit Frischwasser oder Kalkwasser beschickt wird, während die SO2-Gase von unten her aufsteigen.Precipitation in a column that is fed with fresh water or lime water from above, while the SO 2 gases rise from below.

Auf der Zeichnung ist eine derartige Kolonne in einem Aufriß dargestellt.In the drawing, such a column is shown in an elevation.

In den Behälter α mündet die vom Kocher kommende Leitung b, die mit einem Kopf c versehen ist, durch welchen die das Schwefel-(iioxyd enthaltene Lauge möglichst fein verteilt wird; die Gase steigen dann in der Kolonne d auf. Der Kolonne d wird durch die Leitung/ Frischwasser oder Kalkwasser zugeführt, so daß in der Kolonne d eine innige The line b coming from the digester opens into the container α and is provided with a head c through which the lye containing the sulfur dioxide is distributed as finely as possible; the gases then rise in column d . Column d is passed through the line / fresh water or lime water supplied, so that in the column d an intimate

Berührung zwischen Schwefeldioxyd und Wasser stattfindet. Die unkondensierbaren Gase werden durch die Leitung g in den bekannten Kalkturm für die Frischlaugenbereitung abgeführt, während das mit Schwe-There is contact between sulfur dioxide and water. The non-condensable gases are discharged through line g into the well-known lime tower for the preparation of fresh liquor, while the

feldioxyd angereicherte Niederschlagwasser durch die Leitung h abgezogen und in die Kolonne zurückgeführt oder, wenn stark genug, in den Betrieb als Frischlauge zurückgenommen wird. Die vom gasförmigen Schwefeldioxyd befreite Lauge sammelt sich im unteren Teile der Kolonne an und fließt durch den Stutzen m ab. In dem unteren Teil des Behälters α ist eine Rührvorrichtung η eingebaut. Auch wird Luft durch eine Schnatterschlange 0 eingeblasen, so daß die Lauge standig in lebhafter Bewegung gehalten wird, um zu erreichen, daß auch alle schweflige Säure abgeschieden wird, so daß die Lauge dann ganz säurefrei abfließt.Field dioxide-enriched precipitation water is drawn off through line h and returned to the column or, if strong enough, is taken back into operation as fresh liquor. The lye freed from the gaseous sulfur dioxide collects in the lower part of the column and flows off through the nozzle m . A stirring device η is installed in the lower part of the container α. Air is also blown in through a snake 0 so that the lye is kept constantly in lively motion in order to ensure that all the sulphurous acid is also separated out, so that the lye then flows off completely acid-free.

Claims (1)

Patent-Anspruch:Patent claim: Verfahren zur Rückgewinnung des in Sulfitablaugen der Zellstoffgewinnung enthaltenen freien Schwefeldioxyds mit Hilfe von Alkalien oder Frischwasser, dadurch gekennzeichnet, daß die aus den Ablaugen entweichenden, das Schwefeldioxyd enthaltenen Gase dem Kalkwasser- oder Frischwasserstrom in einem Kolonnenturm entgegengeführt werden.Process for the recovery of that contained in sulphite waste liquors from pulp production free sulfur dioxide with the help of alkalis or fresh water, thereby characterized in that the escaping from the waste liquors contain the sulfur dioxide Gases are fed to the lime water or fresh water flow in a column tower.
DEK87117D 1923-09-14 1923-09-14 Process for the recovery of the free sulfur dioxide contained in sulphite waste liquors from pulp production Expired DE406172C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEK87117D DE406172C (en) 1923-09-14 1923-09-14 Process for the recovery of the free sulfur dioxide contained in sulphite waste liquors from pulp production

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEK87117D DE406172C (en) 1923-09-14 1923-09-14 Process for the recovery of the free sulfur dioxide contained in sulphite waste liquors from pulp production

Publications (1)

Publication Number Publication Date
DE406172C true DE406172C (en) 1924-11-20

Family

ID=7235848

Family Applications (1)

Application Number Title Priority Date Filing Date
DEK87117D Expired DE406172C (en) 1923-09-14 1923-09-14 Process for the recovery of the free sulfur dioxide contained in sulphite waste liquors from pulp production

Country Status (1)

Country Link
DE (1) DE406172C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE964740C (en) * 1950-12-12 1957-05-29 Karl Rieth Process and device for the production of high-percentage cooking acids for pulp production using the sulfite process

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE964740C (en) * 1950-12-12 1957-05-29 Karl Rieth Process and device for the production of high-percentage cooking acids for pulp production using the sulfite process

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