AT78800B - Process and device for the evaporation of sulphite and sulphate waste liquors in cell and straw production. - Google Patents

Process and device for the evaporation of sulphite and sulphate waste liquors in cell and straw production.

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Publication number
AT78800B
AT78800B AT78800DA AT78800B AT 78800 B AT78800 B AT 78800B AT 78800D A AT78800D A AT 78800DA AT 78800 B AT78800 B AT 78800B
Authority
AT
Austria
Prior art keywords
evaporation
sulphite
waste liquors
cell
sulphate waste
Prior art date
Application number
Other languages
German (de)
Inventor
Emil Muerbe
Original Assignee
Emil Muerbe
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 Emil Muerbe filed Critical Emil Muerbe
Application granted granted Critical
Publication of AT78800B publication Critical patent/AT78800B/en

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  • Heat Treatment Of Water, Waste Water Or Sewage (AREA)

Description

  

   <Desc/Clms Page number 1> 
 
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   Die Unschädlichmachung der Ablaugen, insbesondere der Sulfitzellstoffabriken, ist dort, wo die Laugen nicht in grosse Wasserläufe geleitet werden können, mit hohen Betriebskosten verknüpft. Die Fabriken dampfen die Laugen entweder mit direktem Feuer in Pfanren ein, indem sie die Rauchgase über die Pfannen leiten, oder sie wenden Vakuumapparate an. In beiden Fällen sind diese Fabriken wegen des grossen Kohlenverbrauches gegenüber denjenigen, welche an grösseren Flüssen liegen, in   grossem Nachteil.   



     Gegenstand der vorliegenden Ernndurg   ist ein Verfahren zur   Konzentiieiung der Laugen,   bei dem die   Konzentrationskosten   um mehr als   80% niedriger sind :   es besteht im wesentlichen darin, dass man die Abgase der   Betriebskesselanlage   vor dem Schornstein oder hinter den Kesseln absaugt und nicht nur zur Vorwärmung der Ablaugen, sondern vor allen Dingen zur Sättigung damit benutzt. Dabei   werden den Laugen @ahezu kostenlos be@eits 80 bis 90% Wasser entzogen.   



   Bisher hat man auch   vorgewärmt, indem   man die Rauchgase des Feuers der Konzentrations- 
 EMI1.2 
   kühlsten   sich aber auf dem weiteren Wege durch Abgabe ihrer Wärme an die neu hinzutretenden Abwassermengen so stark ab, dass sich die von ihnen aufgenommene Feuchtigkeit zum grössten Teile wioder ausschied. Das macht bei Rauchreinigungsanlagen, wo das Wasser mit den auf- 
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 den Laugen treten zu lassen, sondern sicher zu beseitigen, um neue Kosten zu sparen. 



   Gemäss dem vorliegenden Verfahren wird der bei weitem grösste Teil der Konzentration 
 EMI1.4 
 Betriebskostenerfordert. 



   Die Eindickung bei der   Vorwärmung wird noch dadurch gefördert,   dass die Ablauge in den Vorverdampfungsraum unter Druck einströmt und dabei durch Zerstäuber fein zerstäubt wird.   Erst diese feine Zerstäubung   der Flüssigkeit sichert die rasche und   vollständige Sättigung   der 
 EMI1.5 
 prinzipes voll in die Erscheinung treten. 



   Die Zerstäubung der Sulfitablaugen zwecks Entsäurens ist bekannt. Während sie aber beim bekannten Verfahren allein die Abspaltung der schwefligen Säure bewirken soll dient sie 
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   der letzte@en mit   einem Ventilator C abgesaugt und in den Vorverdampfungsraum   D der Ein-     damnf@@     ago bei ss geführt,   wo die Ablauge unter dem Druck einer Pumpe E durch Zerstäuber F   fei :'"'aubt wird.   Die weitere Konzentration   erf@lgt   in den Verdampfern H und J in üblicher   Weise, @öh@end   die gesättigten Rauchgase durch den Schornstein B'der Eindampfanlage entweichen. 



   Das Verfahren ist natürlich nicht auf die Eindampfung von Sülfit- und Sulfatablaugen   beschränkt,   sondern auch für alle anderen Ablaugen, z. B. Kalilaugen, geeignet. 



   PATENT-ANSPRÜCHE :
1. Verfahren zum Eindampfen von Sulfit-und Sulfatablaugen, dadurch gekennzeichnet, dass die Abgase der Betriebskesselanlage in den Vorverdampfungsraum eingedrückt werden und dort auf die unter Druck fein zerstäubt einströmenden Ablaugen treffen, um sieh mit Wasser zu sättigen und gesättigt zu entweichen.



   <Desc / Clms Page number 1>
 
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   The rendering of the waste liquors harmless, especially the sulphite pulp mills, is associated with high operating costs where the liquors cannot be channeled into large watercourses. The factories either steam the lye with direct fire in pans, by directing the smoke gases over the pans, or they use vacuum apparatus. In both cases these factories are at a great disadvantage because of the large amount of coal they consume, compared with those on larger rivers.



     The subject of the present Ernndurg is a process for concentrating the lyes, in which the concentration costs are more than 80% lower: it essentially consists in extracting the exhaust gases from the operating boiler system in front of the chimney or behind the boilers and not just for preheating the Ablaze, but mainly used for saturation with it. 80 to 90% of water is removed from the lyes almost free of charge.



   So far one has also preheated by removing the smoke gases from the fire of the concentration
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   but on the further way they cooled down so much by releasing their heat to the newly arriving wastewater that most of the moisture they absorbed was excreted. This makes for smoke cleaning systems, where the water with the
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 to let the lye step, but to remove it safely to save new costs.



   According to the present method, by far the largest part of the concentration is
 EMI1.4
 Operating costs required.



   Thickening during preheating is further promoted by the fact that the waste liquor flows into the pre-evaporation chamber under pressure and is finely atomized by an atomizer. Only this fine atomization of the liquid ensures the rapid and complete saturation of the
 EMI1.5
 prinzipes make their full appearance.



   The atomization of sulphite waste liquors for deacidification is known. But while in the known process it is solely intended to cause the sulfurous acid to be split off, it serves
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 <Desc / Clms Page number 2>

   the last one is sucked off with a fan C and fed into the pre-evaporation room D of the inlet damnf @@ ago at ss, where the waste liquor is fei: '"' aubt under the pressure of a pump E. Further concentration is required. Is in the evaporators H and J in the usual way, @ öh @end the saturated flue gases escape through the chimney B 'of the evaporation plant.



   The process is of course not limited to the evaporation of sulphate and sulphate waste liquors, but also for all other waste liquors, e.g. B. potassium hydroxide, suitable.



   PATENT CLAIMS:
1. A method for evaporation of sulphite and sulphate waste liquors, characterized in that the exhaust gases from the operating boiler system are pressed into the pre-evaporation space and there meet the waste liquors flowing in finely atomized under pressure in order to saturate with water and then escape saturated.

 

Claims (1)

2. Vorrichtung zur Ausübung des Verfahrens nach Anspruch 1, dadurch gekennzeichnet, dass der Verdampfungsraum von den Verdampfern getrennt und mit Rohrleitungen mit Zerstäubern versehen ist, durch welche die Ablauge in fein zerstäubtem Zustande eintritt, während die heissen Abgase der Betriebskesselanlage mittels eines Ventilators einströmen. 2. Device for performing the method according to claim 1, characterized in that the evaporation chamber is separated from the evaporators and provided with pipelines with atomizers through which the waste liquor enters in a finely atomized state, while the hot exhaust gases from the operating boiler system flow in by means of a fan.
AT78800D 1914-01-20 1914-01-20 Process and device for the evaporation of sulphite and sulphate waste liquors in cell and straw production. AT78800B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AT78800T 1914-01-20

Publications (1)

Publication Number Publication Date
AT78800B true AT78800B (en) 1919-10-25

Family

ID=3600376

Family Applications (1)

Application Number Title Priority Date Filing Date
AT78800D AT78800B (en) 1914-01-20 1914-01-20 Process and device for the evaporation of sulphite and sulphate waste liquors in cell and straw production.

Country Status (1)

Country Link
AT (1) AT78800B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE748514C (en) * 1939-03-15 1944-11-06 Walther Kunze Dr Ing Process for thickening sulphite waste liquor using systematically agitated cold or slightly warm gaseous media such as air

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE748514C (en) * 1939-03-15 1944-11-06 Walther Kunze Dr Ing Process for thickening sulphite waste liquor using systematically agitated cold or slightly warm gaseous media such as air

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