EP2214804A1 - Procédé et dispositif de régénération du détergent chargé dans le cadre d'un lavage de gaz physique - Google Patents

Procédé et dispositif de régénération du détergent chargé dans le cadre d'un lavage de gaz physique

Info

Publication number
EP2214804A1
EP2214804A1 EP07846858A EP07846858A EP2214804A1 EP 2214804 A1 EP2214804 A1 EP 2214804A1 EP 07846858 A EP07846858 A EP 07846858A EP 07846858 A EP07846858 A EP 07846858A EP 2214804 A1 EP2214804 A1 EP 2214804A1
Authority
EP
European Patent Office
Prior art keywords
detergent
stripping
gas
hot
substances
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.)
Withdrawn
Application number
EP07846858A
Other languages
German (de)
English (en)
Inventor
Horst Weiss
Ulvi Kerestecioglu
Ulrich Prüssner
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.)
Linde GmbH
Original Assignee
Linde GmbH
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 Linde GmbH filed Critical Linde GmbH
Publication of EP2214804A1 publication Critical patent/EP2214804A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • 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
    • B01D53/14—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 by absorption
    • B01D53/1418—Recovery of products
    • 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
    • B01D53/14—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 by absorption
    • B01D53/1425—Regeneration of liquid absorbents
    • 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
    • B01D53/14—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 by absorption
    • B01D53/1456—Removing acid components
    • 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
    • C01B17/0408—Pretreatment of the hydrogen sulfide containing gases
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B3/00—Hydrogen; Gaseous mixtures containing hydrogen; Separation of hydrogen from mixtures containing it; Purification of hydrogen
    • C01B3/50—Separation of hydrogen or hydrogen containing gases from gaseous mixtures, e.g. purification
    • C01B3/52—Separation of hydrogen or hydrogen containing gases from gaseous mixtures, e.g. purification by contacting with liquids; Regeneration of used liquids
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2257/00—Components to be removed
    • B01D2257/30—Sulfur compounds
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2257/00—Components to be removed
    • B01D2257/50—Carbon oxides
    • B01D2257/504—Carbon dioxide
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B2203/00—Integrated processes for the production of hydrogen or synthesis gas
    • C01B2203/04—Integrated processes for the production of hydrogen or synthesis gas containing a purification step for the hydrogen or the synthesis gas
    • C01B2203/0415—Purification by absorption in liquids
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B2203/00—Integrated processes for the production of hydrogen or synthesis gas
    • C01B2203/04—Integrated processes for the production of hydrogen or synthesis gas containing a purification step for the hydrogen or the synthesis gas
    • C01B2203/0465—Composition of the impurity
    • C01B2203/0475—Composition of the impurity the impurity being carbon dioxide
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B2203/00—Integrated processes for the production of hydrogen or synthesis gas
    • C01B2203/04—Integrated processes for the production of hydrogen or synthesis gas containing a purification step for the hydrogen or the synthesis gas
    • C01B2203/0465—Composition of the impurity
    • C01B2203/0485—Composition of the impurity the impurity being a sulfur compound
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P20/00—Technologies relating to chemical industry
    • Y02P20/151—Reduction of greenhouse gas [GHG] emissions, e.g. CO2

Definitions

  • the invention relates to a process for detergent regeneration in a physical gas scrubbing, wherein by stripping (cold stripping) in a
  • Stripping column predominantly substances of a first type and by subsequent hot regeneration in a H exertregenerierkolonne predominantly substances of a second type are separated from loaded detergent and a device for carrying out the method.
  • Physical gas scrubbing utilizes the property of liquids to absorb gaseous substances and keep them in solution without chemically binding them. How well a gas is absorbed by a liquid is expressed by the solubility coefficient: the better the gas dissolves in the liquid, the greater its solubility coefficient. The solubility coefficient is temperature dependent and increases LAllg. with falling temperature.
  • the loaded detergent By removing the washed-out, dissolved in the detergent gas components, the loaded detergent is regenerated after the gas scrubbing.
  • the regenerated detergent is normally reused in gas scrubbing while the scrubbed gas components are either disposed of or recycled for commercial use.
  • synthesis crude gases which are produced on an industrial scale in gasification plants from coal or / and hydrocarbon feeds, for example by reforming with steam or by partial oxidation, and which are usually some undesirable constituents, such as water, carbon dioxide (CO 2 ), hydrogen sulfide ( H 2 S) and carbon dioxide sulfide (COS), preferably physical washes are used.
  • CO 2 carbon dioxide
  • H 2 S hydrogen sulfide
  • COS carbon dioxide sulfide
  • methanol wash Of particular importance for the purification of synthesis gas is the methanol wash.
  • the loaded methanol detergent of the prior art is withdrawn from the wash column and initially a so-called.
  • Enrichment column which is a stripping column, abandoned in its upper region.
  • CO 2 is dissolved out of the methanol detergent by a stripping gas carried in countercurrent, which then cools.
  • the cold produced in this way is used to reduce the inevitable cold losses of a methanol wash.
  • the overhead fraction from the hot regeneration column is fed to a sulfur recovery plant (eg, a Claus plant) where it is converted to elemental sulfur.
  • a sulfur recovery plant eg, a Claus plant
  • its CO 2 content must not exceed a limit.
  • the synthesis gas to be purified has a low sulfur content, as is the case, for example, with synthesis gas produced by the gasification of low-sulfur coal, this limit value can only be overcome with great difficulty (eg
  • Object of the present invention is therefore to provide a method of the type mentioned above and an apparatus for performing the method by which the disadvantages of the prior art can be avoided.
  • This object is achieved procedurally according to the invention that the loaded detergent withdrawn after Kaltstrippung from the enrichment column, warmed, relaxed and then in a device for performing a warm expulsion (Warmaustreibungs adopted) a
  • Temperatures is performed, as in the, the warm expulsion preceding cold stripping and at lower temperatures than in the hot expulsion subsequent hot regeneration. Because of the strong temperature dependence of the solubility coefficients, the separation of the substances of the first type from the loaded detergent with a lower amount of stripping gas is achieved by the application of the hot expulsion according to the invention than is possible by sole cold stripping.
  • Preferred process variants provide that the warmed loaded detergent for hot expulsion of a relaxation or a stripping
  • Hot stripping with a stripping gas (hot stripping gas) is subjected.
  • a further preferred variant of the method provides that the warmed loaded detergent for warm expulsion is subjected to a relaxation and the liquid fraction formed during the expansion is treated by hot stripping with hot strip gas.
  • Another preferred embodiment of the method according to the invention provides that both the cold and the hot stripping the same gas, preferably nitrogen, is used as the stripping gas.
  • a preferred embodiment of the method according to the invention therefore provides that the gas stream produced in the case of hot stripping and consisting of hot-stripping gas and the substances separated off from the loaded washing agent
  • the warm expulsion according to the invention comprises, as a method step, merely a relaxation of the warmed laden detergent, then the gas phase formed in this case largely consists of substances of the first type, so that the gas phase, owing to its high purity, has e.g. B. can be supplied directly to an economic use.
  • an embodiment of the method according to the invention provides that the energy for heating the laden detergent withdrawn from the enrichment column is removed from the regenerated detergent, whereby the regenerated detergent cools. In this way, at least some of the cold generated in the cold stripping is used to compensate in practice unavoidable cold losses in a physical gas scrubbing.
  • a preferred embodiment of the method according to the invention provides that in the physical gas scrubbing, a synthesis gas containing carbon dioxide (CO 2 ) and sulfur compounds is purified with methanol as a detergent.
  • CO 2 carbon dioxide
  • sulfur compounds are the second type of material, which are separated separately from the loaded methanol detergent.
  • the invention further relates to a device for detergent regeneration in a physical gas scrubbing, comprising a stripping column (enrichment column), for the separation of substances of a first type and a H exertregenerierkolonne, for separating at least of substances of a second type from loaded detergent.
  • the stated object is achieved in that between the enrichment column and the H Schoregenerierkolonne at least one heat exchanger for heating withdrawn from the enrichment column laden detergent and a device for performing a warm expulsion (Warmaustreibungs Surprise) are provided, wherein the warmed in the heat exchanger laden detergent to another Separation of substances of the first kind in the warm expelling device can be introduced.
  • the warm expelling device is designed as a flash tank or as a stripping column (hot stripper) or as a combination of a flash tank and a downstream hot stripper.
  • Another preferred embodiment of the device according to the invention provides that both the enrichment column as a hot stripper, the same gas, preferably nitrogen, as a stripping gas can be supplied.
  • the device according to the invention comprises a pump which is arranged between the enrichment column and the hot stripper, and by means of which the pressure of the loaded from the enrichment column withdrawn loaded detergent can be raised.
  • the pressure by means of the pump can be raised so far that sufficient pressure for the relaxation of the loaded detergent in the hot stripper is available and the head gas flows back without additional compression to the enrichment column.
  • the warm expelling device comprises only a flash tank, the variant of the device according to the invention provides that the gas phase formed in the flash tank can be fed directly to an economic use.
  • a further preferred embodiment of the device according to the invention provides that in the heat exchanger heat energy can be transferred from a detergent stream fed back to the physical gas scrubber to laden scrubbing agent withdrawn from the enrichment column.
  • the device according to the invention is particularly suitable for use in methanol scrubbing in which CO 2 (first type of substance) and sulfur compounds (second type of substance) are scrubbed out of a synthesis crude which contains at least carbon dioxide (CO 2 ) and sulfur compounds, and during the
  • Regeneration of the loaded methanol detergent can be recovered separately.
  • the invention makes it possible to separate from a loaded detergent substances of a first type much more effective than is possible according to the prior art. Using the same amount of stripping gas, much less substances of the first type enter the material flow generated by hot regeneration, which consists predominantly of substances of the second type. The substances of the second kind are therefore obtained more pure and can thus be treated easier and more economically.
  • the warmed loaded methanol wash is passed via line 4 back into the enrichment column A and there subjected to further stripping, in which both its CO 2 content and its temperature are lowered.
  • the stripping gas laden with stripped components (predominantly CO 2 ) is withdrawn from the top of the enrichment column A, while cold methanol detergent, which still contains carbon dioxide residues and most of the sulfur compounds, is passed via line 6 from the sump space S1.
  • the pressure of the cold methanol laden detergent is raised before it is fed via line 7 to the heat exchanger E1.
  • it is heated in indirect heat exchange against regenerated, via line 8 and discharged via line 9 methanol detergent.
  • the heating is so high that the loaded methanol detergent, after it has been withdrawn via line 10 from the heat exchanger W and relaxed via the throttle body a, with a temperature in the hot stripper W occurs, which is greater than the temperatures at which the regenerating methanol detergent is introduced into the enrichment column A.
  • the hot stripper W which is supplied via line 11 nitrogen as stripping gas, further CO 2 and sulfur compounds are stripped from the loaded methanol detergent.
  • the loaded stripping gas is discharged as top gas and introduced into the lower part of the enrichment column A.
  • the sulfur compounds contained in the head gas are washed out by loaded methanol detergent and thus pass back into the sump space S1.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Organic Chemistry (AREA)
  • Analytical Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Inorganic Chemistry (AREA)
  • Combustion & Propulsion (AREA)
  • Gas Separation By Absorption (AREA)

Abstract

La présente invention concerne un procédé de régénération de détergent dans le cadre d'un lavage de gaz physique. Le procédé consiste d'abord à séparer d'un détergent chargé (2, 17) essentiellement des matières d'un premier type, par stripage (stripage à froid) dans une colonne de stripage (colonne d'enrichissement (A)), puis ensuite à séparer de ce détergent essentiellement des matières d'un second type, par régénération à chaud dans une colonne de régénération à chaud (H). L'invention concerne également un dispositif conçu pour mettre en oeuvre ledit procédé. Le détergent chargé (6) est retiré de la colonne d'enrichissement (A) après le stripage à froid, puis il est chauffé (E1), détendu (A) et ensuite soumis à une expulsion de chaleur dans un dispositif conçu pour mettre en oeuvre une expulsion de chaleur (dispositif d'expulsion de chaleur), où la teneur en matières du premier type dans le détergent chargé est encore réduite.
EP07846858A 2007-11-27 2007-11-27 Procédé et dispositif de régénération du détergent chargé dans le cadre d'un lavage de gaz physique Withdrawn EP2214804A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2007/010297 WO2009068049A1 (fr) 2007-11-27 2007-11-27 Procédé et dispositif de régénération du détergent chargé dans le cadre d'un lavage de gaz physique

Publications (1)

Publication Number Publication Date
EP2214804A1 true EP2214804A1 (fr) 2010-08-11

Family

ID=39639140

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07846858A Withdrawn EP2214804A1 (fr) 2007-11-27 2007-11-27 Procédé et dispositif de régénération du détergent chargé dans le cadre d'un lavage de gaz physique

Country Status (4)

Country Link
US (1) US20110023714A1 (fr)
EP (1) EP2214804A1 (fr)
CA (1) CA2707106A1 (fr)
WO (1) WO2009068049A1 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010013279B3 (de) * 2010-03-29 2011-07-28 Uhde GmbH, 44141 Verfahren und Vorrichtung zur Verarbeitung eines kohlendioxidreichen Sauergases in einem Claus-Prozess
US20140071384A1 (en) * 2012-09-10 2014-03-13 Research In Motion Limited Electrostatic discharge arrangement for an active matrix display
WO2015094961A1 (fr) * 2013-12-17 2015-06-25 Icl-Ip America Inc. Composition d'additif ignifugeant comprenant un mélange de phosphonates cycliques et un ester bisphosphate et mousse de polyuréthane la contenant
DE102019000803A1 (de) 2019-02-05 2020-08-06 Hans-Jürgen Maaß Verfahren zur Erzeugung von Synthesegas
CN113499669B (zh) * 2021-08-02 2024-01-19 高维平 一种高效复合式低温甲醇洗co2回收塔

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DE2856078A1 (de) * 1978-12-23 1980-07-10 Linde Ag Verfahren zum abtrennen und gewinnen gasfoermiger komponenten aus einem gasgemisch durch physikalische waesche
IT1177324B (it) * 1984-11-26 1987-08-26 Snam Progetti Procedimento per rimuovere selettivamente l'idrogeno solforato da miscele gassose contenenti anche anidride carbonica
DE4014018A1 (de) * 1990-05-01 1991-11-07 Metallgesellschaft Ag Verfahren zum reinigen eines h(pfeil abwaerts)2(pfeil abwaerts)s und co(pfeil abwaerts)2(pfeil abwaerts) enthaltenden gases
CA2177449C (fr) * 1996-05-20 2003-04-29 Barry Steve Marjanovich Methode de traitement d'un circuit gazeux pour en separer selectivement les gaz acides
US6607585B2 (en) * 1997-02-11 2003-08-19 David Morrow Raw natural gas processing system and method of processing raw natural gas
WO2005044955A1 (fr) * 2003-11-10 2005-05-19 Basf Aktiengesellschaft Procede d'extraction d'un flux de gaz acide sous haute pression par extraction des gaz acides contenus dans un flux fluidique

Non-Patent Citations (1)

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Title
See references of WO2009068049A1 *

Also Published As

Publication number Publication date
WO2009068049A1 (fr) 2009-06-04
US20110023714A1 (en) 2011-02-03
CA2707106A1 (fr) 2009-06-04

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