DE423849C - Process for stripping off crude ammonia water in the column apparatus - Google Patents

Process for stripping off crude ammonia water in the column apparatus

Info

Publication number
DE423849C
DE423849C DEST36195D DEST036195D DE423849C DE 423849 C DE423849 C DE 423849C DE ST36195 D DEST36195 D DE ST36195D DE ST036195 D DEST036195 D DE ST036195D DE 423849 C DE423849 C DE 423849C
Authority
DE
Germany
Prior art keywords
column
water
ammonia
steam
stripping
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
DEST36195D
Other languages
German (de)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Carl Still GmbH and Co KG
Original Assignee
Carl Still GmbH and Co KG
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 Carl Still GmbH and Co KG filed Critical Carl Still GmbH and Co KG
Priority to DEST36195D priority Critical patent/DE423849C/en
Application granted granted Critical
Publication of DE423849C publication Critical patent/DE423849C/en
Expired legal-status Critical Current

Links

Classifications

    • CCHEMISTRY; METALLURGY
    • C01INORGANIC CHEMISTRY
    • C01CAMMONIA; CYANOGEN; COMPOUNDS THEREOF
    • C01C1/00Ammonia; Compounds thereof
    • C01C1/02Preparation, purification or separation of ammonia
    • C01C1/10Separation of ammonia from ammonia liquors, e.g. gas liquors

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Analytical Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Physical Water Treatments (AREA)

Description

Verfahren zum Abtreiben von rohem Ammoniakwasser im Kolonnenapparat. Das Verfahren hat die Aufgabe, beim Betriebe von Kolonpenapparaten zum Abtreiben rohen Ammoniakwassers den zur Beheizung und Ammoniakabtreibung erforderlichen, direkt einzuführenden Wasserdampf aus dem eingeführten Ammoniakwasser selbst zu erzeugen und damit die Zufuhr von verdünnend wirkendem Fremddampf zu vermeiden, zugleich aber auch den Abtreibevorgang in der Kolonne zu begünstigen und zu verbessern. Eine zur Durchführung des Verfahrens geeignete Einrichtung ist in der Zeichnung schematisch im Aufriß dargestellt.Process for stripping off crude ammonia water in the column apparatus. The process has the task of operating colon apparatus for abortion raw ammonia water, the necessary for heating and ammonia abortion, directly to be introduced to generate water vapor from the introduced ammonia water itself and thus avoiding the supply of diluting external steam, at the same time but also to promote and improve the abortion process in the column. One A device suitable for carrying out the process is shown schematically in the drawing shown in elevation.

Das rohe Gaswasser wird auf den obersten Boden des Oberteils z einer Abtreibekolonne üblicher Bauart durch das Rohr a aufgegeben und trifft beim Niederfließen über die einzelnen Böden mit dem von der Dampfbrause aus der Kalkkolonne 3 aufsteigenden Heizdampfstrom zusammen, durch dessen Einwirkung das flüchtige Ammoniak zum größten Teil aus dem Gaswasser ausgetrieben wird. Die frei gewordenen Ammoniakdämpfe ziehen durch das Rohr q. ab. Vom untersten Boden des Kolonnenteils- i lädt -das - noch- mit den fixen Ammoniakverbindungen und mit geringen Restmengen flüchtigen Ammoniaks behaftete Wasser, vermengt mit etwaigem Kolonnenrücklauf, durch Rohr 5 in einen geschlossenen Ausgleichbehälter 6, aus welchem durch die Pumpe 7 ein Dampferzeuger 8 gespeist wird. Der Dampfraum dieses Kessels steht durch eine Rohrleitung 9 mit der Dampfbrause i i im Fußteil der Kalkkolonne 3 in Verbindung, um hierdurch den erforderlichen Heizdampf in. die Kolonne zu liefern, während durch Rohr io das nicht verdampfte Kesselwasser aus dem Wasserraum des Dampferzeugers 8 in die Kalkkolonne 3 zur Zerlegung der fixen Ammoniakverbindungen eingeleitet wird. Die Behandlung des aus dem Dampferzeuger abfliessenden Wassers in der Kalkkolonne 3 weist keine Besonderheiten auf. Der Kolonne wird bei 12 frische Kalkmilch durch eine Pumpe zugeleitet, während durch die Leitung 13 das vollkommen von Ammoniakverbindungen befreite Abwasser abgezogen wird.The raw gas water is applied to the uppermost tray of the upper part z of a stripping column of conventional design through the pipe a and, as it flows down through the individual trays, meets the heating steam flow rising from the steam shower from the lime column 3, through whose action the volatile ammonia for the most part is expelled from the gas water. The released ammonia vapors pass through the pipe q. away. From the bottom bottom of the column part - i loads - the - still - with the fixed ammonia compounds and with small residual amounts of volatile ammonia, mixed with any column return, through pipe 5 into a closed equalizing tank 6, from which a steam generator 8 is fed by the pump 7 will. The steam space of this boiler is connected to the steam shower ii in the foot part of the lime column 3 through a pipe 9 in order to deliver the necessary heating steam into the column, while the non-evaporated boiler water from the water area of the steam generator 8 into the lime column through pipe io 3 is initiated for the decomposition of the fixed ammonia compounds. The treatment of the water flowing out of the steam generator in the lime column 3 has no special features. Fresh milk of lime is fed to the column at 12 by a pump, while the waste water, which has been completely freed from ammonia compounds, is drawn off through line 13.

Erfahrungsgemäß beträgt unter normalen Verhältnissen das zum vollständigen Abtreiben von Gaswasser erforderliche Dampfgewicht etwa i/5 bis i/4 des Rohwassergewichtes, so daß in dem Dampferzeuger tatsächlich nur ein Bruchteil des insgesamt zufließenden Wassers verdampft werden muß. Die hierzu aufzuwendende Wärme kommt dem Verfahren restlos und verlustfrei zugute, während bei Einführung von Fremddampf nur dessen latente Dampfwärme ausgenutzt werden kann und seine Flüssigkeitswärme mit dem entsprechend vermehrten heißen Abwasser verlorengeht. Man spart also durch das neue Verfahren an Wärmeaufwand und verringert die Abwassermenge. Die Verringerung dieser Abwassermenge kann von besonderer Bedeutung sein, wenn das Wasser im Betriebe wieder verwendet werden soll, z. B. bei der Kohlengasreinigung mittels Ammoniak als Reinigungssubstanz. Da ferner bei dem Verfahren der ganze Wasserinhalt des Dampferzeugers kräftig aufgekocht wird, gehen mit dem erzeugten Heizdampf auch die letzten Reste des noch im Wasser verbliebenen, hauptsächlich kohlensauren Ammoniaks und damit der Kohlensäure in Gasform in die Kolonne über. Durch diese vollständige Austreibung der Kohlensäure aus dem Rollwasser wird erreicht, daß - bei der nachfolgenden Einwirkung des Kalks in der Kalkkolonne die Bildung von kohlensaurem Kalk in dem Wasser und damit das Entstehen von Verkrustungen und Betriebsstörungen verhütet wird.'Experience has shown that under normal conditions this amounts to the full Drifting off gas water required steam weight about 1/5 to 1/4 of the raw water weight, so that actually only a fraction of the total inflowing into the steam generator Water must be evaporated. The heat required for this comes from the process benefit completely and loss-free, while with the introduction of external steam only that latent steam heat can be exploited and its liquid heat with the corresponding increased hot wastewater is lost. So you save with the new process heat consumption and reduces the amount of wastewater. Reducing this amount of wastewater can be of particular importance if the water is reused in the establishment should be, z. B. in coal gas cleaning using ammonia as a cleaning substance. Furthermore, since the entire water content of the steam generator is boiled up vigorously in the process will go with the generated heating steam and the last remnants of the still in the water remaining, mainly carbonic acid ammonia and thus the carbonic acid in Gaseous form into the column. Through this complete expulsion of the carbonic acid from the rolling water it is achieved that - during the subsequent action of the lime in the lime column the formation of carbonate of lime in the water and thus the The formation of incrustations and malfunctions is prevented. '

Claims (1)

PATENTANSPRUCH: Verfahren zum Abtreiben von Ammoniak aus Ammoniakwasser im Kolonnenapparat unter Ausschaltung von Fremddampf zum Beheizen, dadurch gekennzeichnet, daß das in der ersten Kolonne von der Hauptmenge der flüchtigen Ammoniakverbindungen befreite Wasser, bevor es mit Kalk behandelt wird, einem Dampferzeuger zugeführt wird, aus welchem der Dampf zusammen mit der noch darin enthaltenen Kohlensäure in den. unteren Teil der zweiten Kolonne eingeführt wird, während in den oberen Teil dieser Kolonne das ausgekochte Wässer unter Zumischung von Kalk eintritt. Claim: method for driving off ammonia from ammonia water in the column apparatus with the elimination of external steam for heating, characterized in that the water freed from the bulk of the volatile ammonia compounds in the first column, before it is treated with lime, is fed to a steam generator, from which the steam together with the carbonic acid still contained in it in the. The lower part of the second column is introduced, while the boiled water enters the upper part of this column with the addition of lime.
DEST36195D 1922-09-26 1922-09-26 Process for stripping off crude ammonia water in the column apparatus Expired DE423849C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEST36195D DE423849C (en) 1922-09-26 1922-09-26 Process for stripping off crude ammonia water in the column apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEST36195D DE423849C (en) 1922-09-26 1922-09-26 Process for stripping off crude ammonia water in the column apparatus

Publications (1)

Publication Number Publication Date
DE423849C true DE423849C (en) 1926-01-14

Family

ID=7462568

Family Applications (1)

Application Number Title Priority Date Filing Date
DEST36195D Expired DE423849C (en) 1922-09-26 1922-09-26 Process for stripping off crude ammonia water in the column apparatus

Country Status (1)

Country Link
DE (1) DE423849C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1036237B (en) * 1953-04-17 1958-08-14 Harry Pauling Dipl Ing Process for the removal of ammonia from deacidified ammonia-containing gas water which occurs in gas stations and coking plants

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1036237B (en) * 1953-04-17 1958-08-14 Harry Pauling Dipl Ing Process for the removal of ammonia from deacidified ammonia-containing gas water which occurs in gas stations and coking plants

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