DE1036237B - Process for the removal of ammonia from deacidified ammonia-containing gas water which occurs in gas stations and coking plants - Google Patents

Process for the removal of ammonia from deacidified ammonia-containing gas water which occurs in gas stations and coking plants

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Publication number
DE1036237B
DE1036237B DE1953P0009594 DEP0009594A DE1036237B DE 1036237 B DE1036237 B DE 1036237B DE 1953P0009594 DE1953P0009594 DE 1953P0009594 DE P0009594 A DEP0009594 A DE P0009594A DE 1036237 B DE1036237 B DE 1036237B
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DE
Germany
Prior art keywords
ammonia
gas
water
deacidified
removal
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.)
Pending
Application number
DE1953P0009594
Other languages
German (de)
Inventor
Dipl-Ing Harry Pauling
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.)
HARRY PAULING DIPL ING
Original Assignee
HARRY PAULING DIPL ING
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 HARRY PAULING DIPL ING filed Critical HARRY PAULING DIPL ING
Priority to DE1953P0009594 priority Critical patent/DE1036237B/en
Publication of DE1036237B publication Critical patent/DE1036237B/en
Pending legal-status Critical Current

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Classifications

    • CCHEMISTRY; METALLURGY
    • C10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10CWORKING-UP PITCH, ASPHALT, BITUMEN, TAR; PYROLIGNEOUS ACID
    • C10C1/00Working-up tar
    • 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

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Analytical Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Materials Engineering (AREA)
  • Industrial Gases (AREA)

Description

DEUTSCHESGERMAN

Die Erfindung betrifft ein Verfahren zum Abtreiben von Ammoniak aus in Gasanstalten und Kokereien anfallendem, entsäuertem, ammoniakhaltigem Gaswasser. Dieses Gaswasser soll zum Abtreiben des Ammoniaks nach der Erfindung mit einem inerten Gas ohne zusätzliche Zufuhr von Wärme ausgeblasen werden, was bisher noch nicht gelungen ist, denn es tritt beim Ausblasen eine Abkühlung des Gaswassers ein, wodurch sowohl der Wasserdampfpartialdruck wie aber auch insbesondere derAmmoniakpartialdruck so weit herabgesetzt wird, daß man mit einem inerten Gas allein noch keine vollständige Abtreibung des Ammoniaks aus dem Gaswasser erzielen konnte. Das ist von besonderem Nachteil für Gasentschweflungsverfahren, die mit gasförmigem Ammoniak arbeiten. Man hat deshalb für die Gasentschweflung wäßrige Lösungen von Ammoniak angewendet. Das hat insofern einen gewissen Vorteil, als die bei der Gaswäsche anfallenden, wäßrigen Lösungen von Ammoniak lediglich von Schwefelwasserstoff und Kohlensäure befreit zu werden brauchen und dann im Kreislauf ohne Entfernung des Ammoniaks £us diesen Lösungen wieder verwendet werden können. Andererseits ist der Nachteil in Kauf zu nehmen, daß eine vollständige Entfernung des Schwefelwasserstoffes aus dem zu reinigenden Gas, insbesondere auf unter 0,2 g je 100 m3, nicht erreicht werden kann, vor allen Dingen dann nicht, wenn man die Gasentschweflung mit der Ammoniakgewinnung koppeln und in einem Apparat durchführen will.The invention relates to a method for driving off ammonia from deacidified ammonia-containing gas water which occurs in gas stations and coking plants. According to the invention, this gas water is to be blown out with an inert gas without additional supply of heat to drive off the ammonia, which has not yet been achieved, because the gas water is cooled when the gas is blown out, whereby both the water vapor partial pressure and, in particular, the ammonia partial pressure is greatly reduced that one could not achieve a complete abortion of the ammonia from the gas water with an inert gas alone. This is a particular disadvantage for gas desulphurisation processes that work with gaseous ammonia. Aqueous solutions of ammonia have therefore been used for gas desulphurization. This has a certain advantage in that the aqueous ammonia solutions obtained during gas scrubbing only need to be freed from hydrogen sulfide and carbonic acid and can then be reused in the circuit without removing the ammonia from these solutions. On the other hand, the disadvantage must be accepted that a complete removal of the hydrogen sulfide from the gas to be purified, in particular to less than 0.2 g per 100 m 3 , cannot be achieved, especially not if the gas desulfurization is carried out with the Coupling ammonia production and want to carry out in one apparatus.

Die Ausblasung von Ammoniak aus amtnoniakhaltigen Lösungen mittels inerter Gase ist bekannt. Jedoch muß zu diesem Zweck entweder das inerte Gas durch Zusatz von Dampf oder auf andere Weise hoch erwärmt oder der Lösung Wärme zugeführt werden. Ohne einen zusätzlichen Aufwand von Wärme ist die Austreibung vonAmmoniak mittels inerter Gase nicht möglich.The purging of ammonia from ammonia-containing Solutions using inert gases are known. However, either the inert gas heated up by the addition of steam or in some other way, or heat can be added to the solution. The expulsion of ammonia by means of inert gases is not possible without additional expenditure of heat possible.

Zur Lösung der Aufgabe, Gaswasser lediglich mit einem inerten Gas ohne Aufwendung zusätzlicher Wärme völlig vonAmmoniak zu befreien, wird gemäß der Erfindung vorgeschlagen, Rohgaswasser nach der Entsäuerung im heißen Zustand mit einem inerten Gas wie Stickstoff oder mit Ammoniak und Schwefelwasserstoff gereinigtem Kokereigas in einer Gegenstromkolonne auszublasen und den unteren Teil der Gegenstromkolonne durch das beim Ausblasen anfallende Gasdampfgemisch durch die Wand zu erhitzen. Es wurde gefunden, daß die Kondensationswärme des Wasserdampfes ausreicht, um das inerte Gas so weit vorzuwärmen, daß eine völlige Austreibung des Ammoniaks aus dem Gaswasser auch ohne weiteren zusätzlichen Wärmeaufwand gelingt.To solve the problem, gas water only with an inert gas without using additional To free heat completely from ammonia, it is proposed according to the invention, raw gas water after Deacidification in the hot state with an inert gas such as nitrogen or with ammonia and hydrogen sulfide Purified coke oven gas to blow out in a countercurrent column and the lower part of the To heat the countercurrent column by the gas-vapor mixture produced when blowing it out through the wall. It has been found that the heat of condensation of the water vapor is sufficient to make the inert To preheat gas so far that a complete expulsion of the ammonia from the gas water also succeeds without additional heat input.

Die Übertragung von Wärme durch die Wand beiThe transfer of heat through the wall contributes

Verfahren zum Abtreiben von Ammoniak aus in Gasanstalten und KokereienProcess for removing ammonia from gas stations and coking plants

anfallendem, entsäuertem,
ammoniakhaltigem Gaswasser
accumulating, deacidified,
ammonia-containing gas water

Anmelder:Applicant:

Dipl.-Ing. Harry Pauling,
Reichertshofen (Obb.), Stockau 1
Dipl.-Ing. Harry Pauling,
Reichertshofen (Obb.), Stockau 1

Dipl.-Ing. Harry Pauling, Reichertshofen (Obb.J,
ist als Erfinder genannt worden
Dipl.-Ing. Harry Pauling, Reichertshofen (Obb.J,
has been named as the inventor

der Aufarbeitung von ammoniakhaltigem Wasser ist bekannt. Nach einem bekannten Verfahren zur Aufarbeitung von Gaswasser aus der Naßwäsche von Brernistoffdestillationsgasen mit Wasserdampf oder wasserdampfhaltigen Gasen in einer Abtreibekolonne wird das. Wärmegefälle des Abwassers der Abtreibekolonne in seinem oberen Teil mittels einer Wärmepumpe zur Erzeugung von Dampf und im unteren Teil zur Vorwärmung des zufließenden Rohwassers durch die Wand ausgenutzt. Eine Beheizung einer Abtreibekolonne durch die Wand ist aber auch nach diesem Verfahren nicht vorgesehen. Erst die erfindungsgemäß vorgesehene Ausblasung des heißen, von der Entsäuerung kommenden Ammoniakwassers mittels inerter Gasei und die Beheizung des unteren Teiles der für die Ausblasung dienenden Gegenstromkolonne durch das beim Ausblasen entwickelte Gasdampfgemisch ermöglicht, von der Entsäuerung herrührendes, ammoniakhaltiges Gaswasser ohne Aufwendung zusätzlicher Wärme völlig vonAmmoniak zu befreien. Als inerte Gase kommen für das Verfahren der Erfindung Stickstoff oder von Ammoniak und Schwefelwasserstoff gereinigtes Kokereigas in Frage. Das beim Verfahren der Erfindung anfallende, ammoniakhaltige und etwas Wasserdampf enthaltend© Gas kann ohne weiteres zum Entschwefeln von Kokereigas eingesetzt werden. Das Gemisch von inertem Gas, Wasserdampf und Ammoniak läßt sich aber auch zur Herstellung von Ammonsulfat verwenden. Man führt zu diesem Zweck das Gasgemisch in einen Ammoniaksättiger. Durch das inerte Gas erfolgt eine kräftige Rührung, was eine bedeutend bessere Kristallisation zur Folge hat. Durch einen Ventilator läßt sich das inerte Gasthe processing of ammonia-containing water is known. According to a known method for work-up of gas water from the wet scrubbing of fuel distillation gases with steam or Gases containing water vapor in a stripping column will be the heat gradient of the waste water from the stripping column in its upper part by means of a heat pump to generate steam and in the lower part Part used to preheat the incoming raw water through the wall. A heating one However, even this method does not provide for a stripping column through the wall. Only the invention intended blow-out of the hot ammonia water coming from the deacidification by means of inert gas egg and the heating of the lower part the countercurrent column used for blowing out through the gas / vapor mixture developed during blowing out allows ammonia-containing gas water resulting from the deacidification without expenditure to completely remove ammonia from additional heat. The inert gases used in the process of the invention are used Nitrogen or coke oven gas purified from ammonia and hydrogen sulphide. That at Process of the invention accumulating, ammonia-containing and some water vapor containing © gas can without can also be used to desulfurize coke oven gas. The mixture of inert gas, water vapor and ammonia can also be used to produce ammonium sulfate. One leads to this Purpose the gas mixture in an ammonia saturator. The inert gas causes vigorous stirring, which results in a significantly better crystallization. The inert gas can be ventilated through a fan

809 597/51+809 597/51 +

wieder in die für die Abtreibung des Ammoniaks aus dem Gaswasser dienende Kolonne zurückleiten, so daß es einen ständigen Kreislauf durchmacht.return to the column serving for the removal of the ammonia from the gas water, so that it goes through a constant cycle.

Claims (1)

Patentanspruch:Claim: Verfahren zum Abtreiben von Ammoniak aus in Gasanstalten und Kokereien anfallendem, entsäuertem, ammoniakhaltigem Gaswasser mittels inerter Gase, dadurch gekennzeichnet, daß das Rohgaswasser nach der Entsäuerung im heißen Zustand mit einem inerten Gas wie Stickstoff oder mit von Ammoniak und Schwefelwasserstoff gereinigtem Kokereigas in einer Gegenstromkolonne ausgeblasen und der untere Teil der Gegenstromkolonne durch das beim Ausblasen anfallende Gasdampfgemisch durch die Wand erhitzt wird.Process for removing ammonia from deacidified, ammonia-containing gas water by means of inert gases, characterized in that the Raw gas water after deacidification in the hot state with an inert gas such as nitrogen or with coke oven gas purified from ammonia and hydrogen sulphide in a countercurrent column blown out and the lower part of the countercurrent column through the gas vapor mixture produced during the blowing out is heated by the wall. In Betracht gezogene Druckschriften:
Deutsche Patentschriften Nr. 151980, 291038, 582, 373 284, 423 849, 506 021, 893 196.
Considered publications:
German patent specifications No. 151980, 291038, 582, 373 284, 423 849, 506 021, 893 196.
DE1953P0009594 1953-04-17 1953-04-17 Process for the removal of ammonia from deacidified ammonia-containing gas water which occurs in gas stations and coking plants Pending DE1036237B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE1953P0009594 DE1036237B (en) 1953-04-17 1953-04-17 Process for the removal of ammonia from deacidified ammonia-containing gas water which occurs in gas stations and coking plants

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE1953P0009594 DE1036237B (en) 1953-04-17 1953-04-17 Process for the removal of ammonia from deacidified ammonia-containing gas water which occurs in gas stations and coking plants

Publications (1)

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DE1036237B true DE1036237B (en) 1958-08-14

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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE291038C (en) *
DE151980C (en) *
DE324582C (en) * 1920-09-02 Gustav Schuchardt Process for obtaining ammonia from gas water
DE373284C (en) * 1921-01-04 1923-04-10 Bruno Waeser Dr Ing Process for stripping ammonia from its aqueous solutions by means of air
DE423849C (en) * 1922-09-26 1926-01-14 Still Fa Carl Process for stripping off crude ammonia water in the column apparatus
DE506021C (en) * 1925-07-14 1930-08-29 Walter Knothe Dr Process for the cleaning of Schwelabwaessern and for the simultaneous extraction of ammonium salt-containing alkalis
DE893196C (en) * 1951-04-15 1953-10-15 Harry Dipl-Ing Pauling Process for the processing of gas water from the wet washing of fuel distillation gases

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE291038C (en) *
DE151980C (en) *
DE324582C (en) * 1920-09-02 Gustav Schuchardt Process for obtaining ammonia from gas water
DE373284C (en) * 1921-01-04 1923-04-10 Bruno Waeser Dr Ing Process for stripping ammonia from its aqueous solutions by means of air
DE423849C (en) * 1922-09-26 1926-01-14 Still Fa Carl Process for stripping off crude ammonia water in the column apparatus
DE506021C (en) * 1925-07-14 1930-08-29 Walter Knothe Dr Process for the cleaning of Schwelabwaessern and for the simultaneous extraction of ammonium salt-containing alkalis
DE893196C (en) * 1951-04-15 1953-10-15 Harry Dipl-Ing Pauling Process for the processing of gas water from the wet washing of fuel distillation gases

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