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DE1567774A1 - Process for desulphurization of the end gas from Claus plants - Google Patents

Process for desulphurization of the end gas from Claus plants

Info

Publication number
DE1567774A1
DE1567774A1 DE19661567774 DE1567774A DE1567774A1 DE 1567774 A1 DE1567774 A1 DE 1567774A1 DE 19661567774 DE19661567774 DE 19661567774 DE 1567774 A DE1567774 A DE 1567774A DE 1567774 A1 DE1567774 A1 DE 1567774A1
Authority
DE
Germany
Prior art keywords
claus
sulfur
gas
desorption
desulphurization
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
DE19661567774
Other languages
German (de)
Inventor
Dipl-Chem Friedrich Fischer
Dr Rer Nat Dipl-Chem Leschhorn
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.)
Pintsch Bamag AG
Original Assignee
Pintsch Bamag AG
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 Pintsch Bamag AG filed Critical Pintsch Bamag AG
Publication of DE1567774A1 publication Critical patent/DE1567774A1/en
Pending legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B17/00—Sulfur; Compounds thereof
    • C01B17/02—Preparation of sulfur; Purification
    • C01B17/04—Preparation of sulfur; Purification from gaseous sulfur compounds including gaseous sulfides
    • C01B17/0404—Preparation of sulfur; Purification from gaseous sulfur compounds including gaseous sulfides by processes comprising a dry catalytic conversion of hydrogen sulfide-containing gases, e.g. the Claus process
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B01D53/86—Catalytic processes
    • B01D53/8603—Removing sulfur compounds
    • B01D53/8612—Hydrogen sulfide
    • B01D53/8615—Mixtures of hydrogen sulfide and sulfur oxides
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B17/00—Sulfur; Compounds thereof
    • C01B17/02—Preparation of sulfur; Purification
    • C01B17/04—Preparation of sulfur; Purification from gaseous sulfur compounds including gaseous sulfides
    • C01B17/0404—Preparation of sulfur; Purification from gaseous sulfur compounds including gaseous sulfides by processes comprising a dry catalytic conversion of hydrogen sulfide-containing gases, e.g. the Claus process
    • C01B17/0456—Preparation of sulfur; Purification from gaseous sulfur compounds including gaseous sulfides by processes comprising a dry catalytic conversion of hydrogen sulfide-containing gases, e.g. the Claus process the hydrogen sulfide-containing gas being a Claus process tail gas
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B17/00—Sulfur; Compounds thereof
    • C01B17/02—Preparation of sulfur; Purification
    • C01B17/04—Preparation of sulfur; Purification from gaseous sulfur compounds including gaseous sulfides
    • C01B17/0404—Preparation of sulfur; Purification from gaseous sulfur compounds including gaseous sulfides by processes comprising a dry catalytic conversion of hydrogen sulfide-containing gases, e.g. the Claus process
    • C01B17/046—Preparation of sulfur; Purification from gaseous sulfur compounds including gaseous sulfides by processes comprising a dry catalytic conversion of hydrogen sulfide-containing gases, e.g. the Claus process without intermediate formation of sulfur dioxide
    • C01B17/0469—Preparation of sulfur; Purification from gaseous sulfur compounds including gaseous sulfides by processes comprising a dry catalytic conversion of hydrogen sulfide-containing gases, e.g. the Claus process without intermediate formation of sulfur dioxide at least one catalyst bed operating below the dew-point of sulfur

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Inorganic Chemistry (AREA)
  • Environmental & Geological Engineering (AREA)
  • Materials Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Biomedical Technology (AREA)
  • Analytical Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Treating Waste Gases (AREA)

Description

Butzbach, den 30. August I966 ZEP-N/ZiButzbach, August 30, 1966 ZEP-N / Zi

Anmelder: PINTSGfI BAMiVG Aktiengesellschaft Berlin 21 und Butzbach / OberhessenApplicant: PINTSGfI BAMiVG Aktiengesellschaft Berlin 21 and Butzbach / Oberhessen

Verfahren zur Entschwefelung des Endgases aus ClausanlagenProcess for desulphurization of the end gas from Claus plants

Die Erfindung betrifft ein Verfahren, das Endgas einer Clausanlage von seinen Schwefelverbindungen zu befreien.The invention relates to a method, the tail gas of a Claus plant to get rid of its sulfur compounds.

Es ist vorgeschlagen worden, Claus-Endgase durch Waschen mit wässrigen, alkalischen Lösungen (DBP 1 166 751) oder mit organischen Flüssigkeiten wie N-Methylpyrrolidon (DAS 1 091 995) oder Diäthylenglykol (DAS 1 110 144) von Schwefelwasserstoff und SchweIt has been proposed to remove Claus end gases by washing with aqueous, alkaline solutions (DBP 1 166 751) or with organic Liquids such as N-methylpyrrolidone (DAS 1 091 995) or Diethylene glycol (DAS 1 110 144) of hydrogen sulfide and sulfur

feldioxyd zu befreien, wobei in der flüssigen Phase die Umsetzung zu Elementarschwefel nach der Bruttogleichung to liberate field dioxide, whereby in the liquid phase the conversion to elemental sulfur according to the gross equation

H2S + 0,5 O2 > H2O + SH 2 S + 0.5 O 2 > H 2 O + S

erfolgt. Diesen Verfahren gemeinsam ist der Nachteil der hohen Anlagekosten.he follows. Common to these processes is the disadvantage of high Investment costs.

Das erfindungsgemässe Verfahren zur Entschwefelung von Clauaendgasen sieht demgegenüber vor, die Umsetzung des Schwefelwasserstoffes in der Clausanlage mit Sauerstoffuntersohuse zu betreiben, so dass die die letzte Clauskontaktstufe verlassenden Endgase praktisch nur Schwefelwasserstoff neben ganz geringen Mengen an Schwefeldioxyd enthalten, das nunmehr sahwefelwaaseratoffhaltlge Clausendgas bis auf Temperaturen aubzukühlen, die einigeThe method according to the invention for the desulfurization of Clauaend gases on the other hand, provides for the conversion of the hydrogen sulfide in the Claus plant to be operated with an oxygen sub-tank, so that the end gases leaving the last Claus contact stage practically only contain hydrogen sulphide in addition to very small amounts of sulfur dioxide, which now contains sahwefelwaaseratofflge Clausendgas to cool down to temperatures that some

009834/U09009834 / U09

Grad Celsiua über dem Taupunkt liegen, und es unter Zusatz von Sauerstoff oder Luft über ein Aktivkohlebett zu leiten. In diesem Adsorptionsbett erfolgt die katalytische Oxydation des Schwefelwasserstoffs zu Elementarschwefel, der in der Aktivkohle zurückgehalten wird. Wenn die Aktivkohle beladen ist, wird erfindungsgeraäss .der Elementarschwefel mit heissem Inertgas bei Temperaturen von mehr als 220° ausgeschmolzen oder mit 300 bis 400grädigem Wasserdampf ausgetrieben. Im letzten Fall entsteht neben flüssigem und dampfförmigem Elementarschwefel eine der umgekehrten Clausreaktion entsprechende Menge von Schwefelwasserstoff und Schwefeldioxyd. Die Desorptionsschwaden werden in beiden Fällen der Clausanlage zugeführt und an geeigneter Stelle dem Prozessgasstrom zu^emischt. /orteilhafterweise geschieht dies in dem Schwefelkondensator nach der ersten Clauskontaktstufe.Degrees Celsiua above the dew point, and adding it to Passing oxygen or air over an activated carbon bed. The catalytic oxidation of the hydrogen sulfide takes place in this adsorption bed to elemental sulfur, which is retained in the activated carbon. When the activated charcoal is loaded, according to the invention .the elemental sulfur melted with hot inert gas at temperatures of more than 220 ° or with 300 to 400 degree water vapor expelled. In the latter case, in addition to liquid and vapor elemental sulfur, the opposite is the case Claus reaction corresponding amount of hydrogen sulfide and sulfur dioxide. The desorption plumes are in both Cases fed to the Claus plant and mixed with the process gas stream at a suitable point. / beneficially this is done in the sulfur condenser after the first Claus contact stage.

Anhand des in der Zeichnung dargestellten Anlageschemas wird der Verfahrensgang gemäss dem Erfindungsgedanken näher erläutert. Das echwefelwas.serstoffhaltige Rohgas wird durch Leitung 1, die erforderliche Sauerstoffmenge in Form von Sauerstoff oder Luft über Leitung 2 dem Clauskessel A zugeleitet. Dabei wird der Sauerstoff in geringem Unterschuss zugegeben, so dass im Claus-Endgas praktisch nur noch Schwefelwasserstoff enthalten ist. Aus dem Clauskeasel A werden die heissen Reaktionsgase über Leitung 3 der ersten Clauskontaktstufe B zugeleitet. Z.ur Abscheidung des gebildeten Elementarschwefels gelangt das Gasgemisch über die Leitung 4 in den Wärmeaustauscher C, in dem es seine fUhIbare Wärme an bereits vorgekühltea Reaktionäres aus dem Kondensator O abgibt. Vom Wärmeaustauscher C gelangt das Reaktionsgaa über die LeitungThe process sequence according to the concept of the invention is explained in more detail with the aid of the system diagram shown in the drawing. The raw gas containing echwefelwas.serstoffhaltige is fed through line 1, the required amount of oxygen in the form of oxygen or air through line 2 to the Claus boiler A. A slight deficit of oxygen is added, so that the Claus end gas practically only contains hydrogen sulfide. From the Clauskeasel A, the hot reaction gases are fed to the first Claus contact stage B via line 3. In order to separate the elemental sulfur formed, the gas mixture reaches the heat exchanger C via line 4, in which it gives off its heat to already pre-cooled reactants from the condenser O. The reaction gas passes from the heat exchanger C via the line

009834/U09009834 / U09

5 lh den Kondensator D und von dort über ,Leitung 6 zurück in den Wärmeaustauscher C, wobei es wieder auf Reaktionstemperatur erwärmt wird, über die Leitung 7 wird das Reaktionsgas der zweiten Kontaktstufe E zugeleitet und gelangt dann über Leitung 8 in den Endkondensator F. Die Kondensatoren B und F stehen über die Leitungen 9» 91 und 9'' mit dem Dampfsammler G in Verbindung. Der anfallende Elementarschwefel wird über die Leitungen t2f 12», 12'r und 12'.' ' aus dem Clauskessel A, dem Wärmeaustauscher C und dem Kondensatoren D und F in den Schwefelsammelbehälter II geleitet. Das den Kondensator F verlassende Claüsendgas wird gegebenenfalls, nach weiterer Kühlung bis auf wenige Grad über seinem Taupunkt der Aktivkohleanlage J zugeführt. Dabei wird ihm der zur Oxydation des noch vorhandenen Schwefelwasserstoffs erforderliche Sauerstoff in Form von Luft oder Sauerstoff aus Leitung 15 zudosiert. Nach Beladung des Aktivkohlebettes erfolgt ein Austreiben des EIementarschwefeis mit heissem Inertgas oder Wasserdampf aus der Leitung 13. Die Desorptionsschwaden werden Über die Leitung 14, 14' oder 14'' der Clausenlage wieder zugeführt, und zwar dem Clauskessel oder einem der Schwefelkondensatoren, vorzugsweise dem Schwefelkondensator nach der eraten Clauskontaktstufe.5 lh the condenser D and from there via line 6 back into the heat exchanger C, where it is reheated to reaction temperature, via line 7 the reaction gas is fed to the second contact stage E and then passes via line 8 into the final condenser F. The Capacitors B and F are connected to steam collector G via lines 9 »9 1 and 9 ″. The resulting elemental sulfur is transported via the lines t2 f 12 », 12 ' r and 12'. ''Passed from the Claus boiler A, the heat exchanger C and the condensers D and F into the sulfur collecting tank II. The Claüs end gas leaving the condenser F is optionally fed to the activated carbon system J after further cooling to a few degrees above its dew point. The oxygen required to oxidize the hydrogen sulfide still present is metered into it in the form of air or oxygen from line 15. After loading the activated carbon bed, the elementary sulfur is expelled with hot inert gas or steam from line 13. The desorption plumes are returned to the Clausenlage via line 14, 14 'or 14'', namely to the Claus boiler or one of the sulfur condensers, preferably the sulfur condenser after the erated Claus contact level.

009 8 34/140 9009 8 34/140 9

Claims (2)

PatentansprücheClaims f. Verfahren zur Entschwefelung der Endgase aus Clausanlagen, dadurch gekennzeichnet, dass die Clausanlage mit Sauerstoffunterschuss betrieben und damit ein Clausendgas erzielt wird, das in der Hauptsache als Schwefelverbindung nur Schwefelwasserstoff neben geringen Mengen Schwefeldioxyd enthält, dass die Endgase nach eventuell erforderlicher Kühlung bis auf wenige Grade oberhalb ihres Taupunktes einer Aktivkohleanlage zugeführt werden und hier der in den Clausendgasen enthaltene Schwefelwasserstoff durch Zuspeisen von Sauerstoff oder Luft in Elementarschwefel übergeführt wird, und dass die beladene Aktivkohle mit heissem Inertgas oder Wasserdampf ausgeschmolzen oder ausgedämpft wird und die dabei anfallenden Desorptionsschwaden der Clausanlage zugeführt werden.f. process for the desulphurization of the end gases from Claus plants, characterized in that the Claus plant is operated with an oxygen deficit and thus a Claus end gas is achieved, which mainly contains only hydrogen sulphide as a sulfur compound in addition to small amounts of sulfur dioxide, that the end gases after any necessary cooling down to a few degrees above their dew point of an activated carbon system are supplied and here the one contained in the Claus end gases Hydrogen sulfide is converted into elemental sulfur by adding oxygen or air, and that the laden Activated charcoal is melted or steamed out with hot inert gas or steam and the resulting desorption vapor are fed to the Claus plant. 2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass die Desorptionsschwaden einem der Schwefelkondensatoren, vorzugsweise dem Schwefelkondensator nach der ersten Clauskontakt-2. The method according to claim 1, characterized in that the desorption steam is one of the sulfur condensers, preferably the sulfur condenser after the first Claus contact stufe, zugeleitet werden.stage. j>. Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass die Desorptionasschwaden in den Clauskessel eingeleitet werden.j>. The method according to claim 1, characterized in that the Desorption gas vapors are introduced into the Claus boiler. 009834/U09009834 / U09
DE19661567774 1966-09-07 1966-09-07 Process for desulphurization of the end gas from Claus plants Pending DE1567774A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEP0040347 1966-09-07

Publications (1)

Publication Number Publication Date
DE1567774A1 true DE1567774A1 (en) 1970-08-20

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ID=7377086

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19661567774 Pending DE1567774A1 (en) 1966-09-07 1966-09-07 Process for desulphurization of the end gas from Claus plants

Country Status (2)

Country Link
DE (1) DE1567774A1 (en)
GB (1) GB1151316A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4109892A1 (en) * 1991-03-26 1992-10-01 Metallgesellschaft Ag METHOD FOR REMOVING SULFUR HYDROGEN FROM GAS BY MEANS OF ACTIVE CARBON
US5762899A (en) * 1995-03-03 1998-06-09 Metallsgesellschaft Aktiengesellschaft Process for desulfurizing a H2 S-containing gas

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2186427A1 (en) * 1972-05-31 1974-01-11 Oxy France Sulphur from hydrogen sulphide - by burning in appts which recycles waste gases
DE2555096C3 (en) 1975-12-08 1980-07-03 Metallgesellschaft Ag, 6000 Frankfurt Process for the production of sulfur
DE2805992C2 (en) * 1978-02-13 1983-02-10 Krupp-Koppers Gmbh, 4300 Essen Process for the treatment of residual gases that arise during the combustion of hydrogen sulfide to form elemental sulfur according to the Claus process
NL8600960A (en) * 1986-04-16 1987-11-16 Veg Gasinstituut Nv METHOD FOR EXTRACTING SULFUR FROM SULFUR-CONTAINING GASES
CN107899390A (en) * 2017-09-25 2018-04-13 江苏河海新能源股份有限公司 A kind of de- hydrogen sulphide removing device

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4109892A1 (en) * 1991-03-26 1992-10-01 Metallgesellschaft Ag METHOD FOR REMOVING SULFUR HYDROGEN FROM GAS BY MEANS OF ACTIVE CARBON
US5256384A (en) * 1991-03-26 1993-10-26 Metallgesellschaft Aktiengesellschaft Activated carbon process for removing hydrogen sulfide from gases
US5762899A (en) * 1995-03-03 1998-06-09 Metallsgesellschaft Aktiengesellschaft Process for desulfurizing a H2 S-containing gas

Also Published As

Publication number Publication date
GB1151316A (en) 1969-05-07

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