DE2847714C2 - Process for regenerating a solid adsorber - Google Patents

Process for regenerating a solid adsorber

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Publication number
DE2847714C2
DE2847714C2 DE2847714A DE2847714A DE2847714C2 DE 2847714 C2 DE2847714 C2 DE 2847714C2 DE 2847714 A DE2847714 A DE 2847714A DE 2847714 A DE2847714 A DE 2847714A DE 2847714 C2 DE2847714 C2 DE 2847714C2
Authority
DE
Germany
Prior art keywords
water vapor
steam
desorbate
adsorber
desorption
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
DE2847714A
Other languages
German (de)
Other versions
DE2847714A1 (en
Inventor
Horst 5380 Bad Homburg Biewald
Kurt 6000 Frankfurt Kaul
Horst Günter 5380 Bad Homburg May
Emil Dipl.-Chem. Dr. 6000 Frankfurt Ruhl
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.)
GEA Group AG
Original Assignee
Metallgesellschaft 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 Metallgesellschaft AG filed Critical Metallgesellschaft AG
Priority to DE2847714A priority Critical patent/DE2847714C2/en
Priority to JP14194179A priority patent/JPS5567330A/en
Publication of DE2847714A1 publication Critical patent/DE2847714A1/en
Application granted granted Critical
Publication of DE2847714C2 publication Critical patent/DE2847714C2/en
Expired legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/30—Processes for preparing, regenerating, or reactivating
    • B01J20/34—Regenerating or reactivating
    • B01J20/345—Regenerating or reactivating using a particular desorbing compound or mixture
    • B01J20/3458—Regenerating or reactivating using a particular desorbing compound or mixture in the gas phase
    • B01J20/3466—Regenerating or reactivating using a particular desorbing compound or mixture in the gas phase with steam
    • 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
    • B01D53/02—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 adsorption, e.g. preparative gas chromatography
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
    • B01J20/20—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising free carbon; comprising carbon obtained by carbonising processes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/30—Processes for preparing, regenerating, or reactivating
    • B01J20/34—Regenerating or reactivating
    • B01J20/3416—Regenerating or reactivating of sorbents or filter aids comprising free carbon, e.g. activated carbon
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B32/00—Carbon; Compounds thereof
    • C01B32/30—Active carbon
    • C01B32/354—After-treatment
    • C01B32/36—Reactivation or regeneration

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Analytical Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Inorganic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Separation Of Gases By Adsorption (AREA)
  • Solid-Sorbent Or Filter-Aiding Compositions (AREA)
  • Treating Waste Gases (AREA)

Description

Die Erfindung betrifft ein Verfahren zum periodischen Regenerieren eines Fesistoffadsorbers, der im Adsorptionsbetrieb verbrennbare, organische Verunreinigungen bindet, die aus dem Adsorber mit Wasserdampf desorbiert werden, wobei ein Teil des Energieinhalts des Desorbats der Erzeugung von Wasserdampf für die Desorption dient.The invention relates to a method for periodically regenerating a Fesistoffadsorbers, which in the Adsorption operation binds combustible, organic impurities from the adsorber with water vapor are desorbed, with part of the energy content of the desorbate generating water vapor is used for desorption.

Ein solches Verfahren ist aus der DE-PS 4 60471 bekannt, wobei aus dem Desorbat durch indirekten Wärmeaustausch Energie für weiteren Desorptions-Wasserdampf zurückgewonnen wird. Die DE-OS 20 30 153 beschreibt ein Desorptionsverfahren, in welchem ein inertes Desorptionsgas verwendet wird, das durch stöchiometrische Verbrennung von Kohlenwasserstoffen erzeugt ist.Such a method is known from DE-PS 4 60471, with energy for further desorption water vapor from the desorbate through indirect heat exchange is recovered. DE-OS 20 30 153 describes a desorption process in which an inert Desorption gas is used, which is generated by stoichiometric combustion of hydrocarbons is.

Der Erfindung liegt die Aufgabe zugrunde, die Desorption von Festsioffadsorbern ;iuf einfache und kostengünstige Weise durchzuführen. Erfindungsgemäß geschieht dies beim eingangs genannten Verfahren dadurch, daß das Desorbat unter Luftzufuhr verbrannt und die fühlbare Wärme des Rauchgases zum Erhitzen des Speicherwassers eines Dampfspeicher genutzt wird, aus dem man den Wasserdampf für die Desorption entnimmt.The invention is based on the problem of the desorption of solid adsorbers in a simple and inexpensive manner Way to perform. According to the invention, this is done in the method mentioned at the outset by that the desorbate is burned with a supply of air and the sensible heat of the flue gas for heating the storage water of a steam storage tank is used, from which the water vapor is used for desorption removes.

Die Verwendung eines Wasserdampfspeichers empfiehlt sich deshalb, weil bei der periodischen Regenerierung des Adsorbers zeitlich stark schwankende Desorbatströme und damit auch schwankende Wärmeströme im Abhitzekessel anfallen. Aus dem Dampfspeicher kann durch Entspannen die gewünchte Wasserdampfmenge freigesetzt werden. Sie steht vor allem auch dann zur Verfügung, wenn bei Beginn der Desorption durch Desorbatverbrennung noch kein Dampf erzeugt wird.The use of a water vapor storage tank is recommended because it is used for periodic regeneration of the adsorber, desorbate flows fluctuating strongly over time and thus also fluctuating heat flows incurred in the waste heat boiler. The desired amount of steam can be released from the steam accumulator by relaxing be released. Above all, it is also available when the desorption begins Desorbate combustion still no steam is generated.

Das Verfahren ist besonders dann wirtschaftlich, wenn das Abgas nur geringe Konzentrationen an brennbaren Verunreinigungen enthält und große Abgasmengen behandelt werden müssen.The process is particularly economical when the exhaust gas has only low concentrations Contains flammable contaminants and large amounts of exhaust gas need to be treated.

Für die Dampfspeicherung können bekannte Verfahren und Einrichtungen verwendet werden, so z. B. der Ruths'sehe Dampfspeicher. Die Dampfspeicherung arbeitet /umeist unter Überdruck von mindestens 2 bar bis etwa 20 bar. Der Dampfspeieher ist weitgehend mit Heißwasser gefüllt und kommuniziert mit dem vorgeschalteten Abhitzekessel. Die in der Brennkammer freiwerdende Energie wird im Abhitzekessel und im Dampfspeicher hauptsächlich in dem unter Druck stehenden Wasser gespeichert. Der vom Speicher abgegebene Wasserdampf wird entspannt, bevor er zur Desorption verwendet wird. Der Wasserdampf ist dabei leicht überhitzt und weist im allgemeinen Temperaturen von110bisl60°Cauf.Known methods and devices can be used for steam storage, e.g. B. the Ruths see steam storage. The steam storage works / mostly under overpressure of at least 2 bar up to about 20 bar. The steam boiler is largely filled with hot water and communicates with the upstream one Waste heat boiler. The energy released in the combustion chamber is used in the waste heat boiler and in the Steam storage mainly in the pressurized Water stored. The water vapor released by the storage tank is expanded before it is used for desorption is used. The water vapor is slightly overheated and generally has temperatures from 110 to l60 ° C.

Da zu Beginn des Dcsorbatanfalles sehr große Wärmemengen durch Verbrennen frei werden, wird die Dampfzugabe zum Absorber in dieser Phase gedrosselt.Since very large amounts of heat at the beginning of the dcsorbate attack are released by burning, the addition of steam to the absorber is throttled in this phase.

to um eine gleichmäßige Wärmeproduklion und damit eine weitergehende Ausnutzung zu erreichen.to a uniform heat production and thus a to achieve further utilization.

Ein Schaltungsbcispiel für das erfindungsgema'ße Verfahren wird mit Hilfe der Zeichnung erläutert.
Der Adsorber 1 zum Reinigen von Abgas weist eine Schüttung 2 eines Adsorbens, z. B. Aktivkohle, auf. Im Adsorptionsbetrieb wird das Abgas durch die Leitung 5 mit dem geöffneten Ventil 6 dem Adsorber 1 zugeführt und über die Reingasleilung3 mit geöffnetem Ventil 4 in die Atmosphäre abgeleitet.A circuit example for the method according to the invention is explained with the aid of the drawing.
The adsorber 1 for cleaning exhaust gas has a bed 2 of an adsorbent, for. B. activated carbon. In adsorption mode, the exhaust gas is fed to the adsorber 1 through the line 5 with the valve 6 open and discharged into the atmosphere via the clean gas line 3 with the valve 4 open.

Wenn die Schüttung 2 des Adsorbers beladen ist und desorbiert werden muß, werden die Ventile 4 und 6 geschlossen und Wasserdampf durch die Leitung 7 über das geöffiiele Ventil 8 in den Adsorber 1 geleitet. Das Desorbat, bestehend aus Wasserdampf und verbrennbaren Verunreinigungen, wird durch die Leitung 9 und das geöffnete Ventil 10 direkt einer Brennkammer 11 zugeführt Die Brennkammer erhält Verbrennungsluft über ate Leitung 12 und das Gebläse 13. Zusatzbrennstoff, z. B. Heizöl, kann in der Leitung 14 herangeführt werden.When the bed 2 of the adsorber is loaded and must be desorbed, the valves 4 and 6 are closed and water vapor through the line 7 over the open valve 8 is passed into the adsorber 1. That Desorbate, consisting of water vapor and combustible impurities, is passed through line 9 and the opened valve 10 is fed directly to a combustion chamber 11. The combustion chamber receives combustion air via ate line 12 and the fan 13. Additional fuel, e.g. B. heating oil can be brought in line 14 will.

Die Verbrennungstemperaturen in der Brennkammer 11 liegen üblicherweise bei etwa 8000C. um einen befriedigenden Ausbrand der organischen Stoffe zu erreichen. Das Rauchgas der Brennkammer 11 wird in der Leitung 15 zu einem Abhitzekessel 16 geleitet. Diesem Abhitzekessel 16 wird Speisewasser durch die Leitung 17 zugeführt und erzeugter Wasserdampf und erhitztes Wasser führt man durch die Leitung 18 zu einem Dampfspeicher (9. Das abgekühlte Rauchgas gelangt aus dem Abhitzekessel 16 über die Leitung 20 /um Kamin 21.The combustion temperatures in the combustion chamber 11 are usually around 800 ° C. in order to achieve a satisfactory burnout of the organic substances. The flue gas from the combustion chamber 11 is conducted in line 15 to a waste heat boiler 16. This waste heat boiler 16 is fed with feed water through the line 17 and the generated steam and heated water are fed through the line 18 to a steam storage device (9. The cooled flue gas comes from the waste heat boiler 16 via the line 20 / around the chimney 21.

Der Speicher 19 ist gefüllt, wenn er bei seinem oberen Wasserstand den maximalen Arbeitsdruck und die dazugehörige Sattdampftempcratiir aufweist. Sobald manThe memory 19 is filled when it has the maximum working pressure and the associated pressure at its upper water level Having saturated steam temperature. As soon as one

4r> im Adsorber 1 Wasserdampf zur Desorption braucht, wird er dem Dampfspeicher 19 über a.c Leitung 22 entnommen. Bei absinkendem Druck verdampfen entsprechende Wassermengen aus dem Speicher, bis zu Beginn des Desorbatanfalls wieder Energie in der Brennkammer frei wird und Druck und Temperatur im Speichersystem wieder ansteigen.4 r > in the adsorber 1 needs water vapor for desorption, it is taken from the steam accumulator 19 via line 22 ac. When the pressure drops, corresponding amounts of water evaporate from the storage unit until energy is released again in the combustion chamber at the beginning of the desorbate accumulation and the pressure and temperature in the storage system rise again.

Beispie IExample I.

In einer Anlage mit der in der Zeichnung dargestellten Verfahrensführung werden pro Stunde 100 000 Nm1 Abluft mit 300 kg organischen Stoffen vier parallel geschalteten Adsorbern 1 aufgegeben. Die Abluft hat eine Temperatur von 40"C und einen Druck von etwaIn a system with the procedure shown in the drawing, 100,000 Nm 1 of exhaust air with 300 kg of organic substances are given up to four adsorbers 1 connected in parallel. The exhaust air has a temperature of 40 "C and a pressure of around

M) 1,05 bar. Die Adsorber enthalten je eine Akiivkohlefüllung von 9 t mit einer Schütthöhe von 1,20 m. Wenn die Aktivkohle eine Zusatzbcladung von etwa 3.5 Gew.-0/» erreicht hat, wird der jeweilige Adsorber mit Wasserdampf desorbiert, wofür ca. eine Stunde erforderlich ist.M) 1.05 bar. The adsorber each containing a Akiivkohlefüllung of 9 t with a bed height of 1.20 m. When the activated carbon has "reached a Zusatzbcladung of about 3.5 wt 0 /, the respective adsorber is desorbed with steam, for which about one hour is required .

hi Der Dcsorpiionsdampf wird einem Ruihs'schen Dampfspeicher 19 entnommen, der mit dem Abhitzekessel lh kommuniziert. Der Dampf steht zu Beginn der Desorption unter einem Druck von 10 bar bei einer Tempera-hi The Dcsorpiionsdampf is taken from a Ruihs'schen steam storage 19, which communicates with the waste heat boiler lh. At the beginning of the desorption, the steam is under a pressure of 10 bar at a temperature

tür von 181°C und wird vor Eintritt in den Adsorber entspannt. Der Dampf hat nach dem Entspannen zu Beginn eine Temperatur von ca. 150"C. Beim Druckabfall im Dampfspeicher weiden etwa ein Zehntel des Wasserinhaltes verdampft und stehen für die Desorp- »Jon zur Verfugung. Die Bemessung des Speichervolumens erfolgt so, daß die Zeit zwischen Desorptionsbeginn und erstem Desorbatanfall überbrückt wird. Das anfallende Desorbat. bestehend aus einem GemisLh von Wasserdampf und den Dämpfen der zuvor adsorbierten. organischen Stoffe wird in einer Brennkammer bei etwa 800" C und einem Mindestsauerstoffgehalt von 3% im Rauchgas verbrannt. Der Wärmeinhalt dieses Rauchgases wird im nachgeschalteten Abhitzekessel 16 so weit wie möglich zur Dampferzeugung ausgenutzt. Die Kühlung und Trocknung des desorbierten Adsorbers erfolgl während der ersten Minuten des erneuten Beladens mit der Beladeluft selbst.door of 181 ° C and is before entering the adsorber relaxed. After the pressure has been released, the steam initially has a temperature of approx. 150 "C. When the pressure drops about a tenth of the water content evaporates in the steam accumulator and represents the desorption “Jon available. The dimensioning of the storage volume takes place in such a way that the time between the start of desorption and the first occurrence of desorbate is bridged. That accruing desorbate. consisting of a mixture of water vapor and the vapors previously adsorbed. organic matter is in a combustion chamber at around 800 "C and a minimum oxygen content of 3% in the Burned flue gas. The heat content of this flue gas is so far in the downstream waste heat boiler 16 exploited as much as possible to generate steam. The cooling and drying of the desorbed adsorber takes place during the first few minutes of reloading the loading air itself.

Hierzu I Blatt ZeichnungenFor this purpose I sheet drawings

JOJO

J5J5

Claims (2)

Patentansprüche:Patent claims: 1. Verfahren zum periodischen Regenerieren eines Feststoffadsorbers, der im Adsorptionsbetrieb verbrennbare, organische Verunreinigungen bindet, die aus dem Absorber mit Wasserdampf desorbieri werden, wobei ein Teil des Energieinhalts des Desorbats der Erzeugung von Wasserdampf für die Desorption dient, dadurch gekennzeichnet, daß das Desorbat unter Luftzufuhr verbrannt und die fühlbare Wärme des Rauchgases zum Erhitzen des Speicherwassers eines Dampfspeichers genutzt wird, aus dem man den Wasserdampf für die Desorption entnimmt1. Method for periodically regenerating a solid adsorber that is in adsorption mode binds combustible, organic impurities that desorbieri from the absorber with water vapor where part of the energy content of the desorbate is used to generate water vapor for desorption, characterized in that, that the desorbate is burned with a supply of air and the sensible heat of the flue gas for heating of the storage water of a steam accumulator is used, from which one takes the water vapor for the desorption 2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß der Desorbatanfall und die Wasserdampferzeugung über die dem Adsorber zugeführte Wasserdampfmenge geregelt wird.2. The method according to claim 1, characterized in that the desorbate and the steam generation via the supplied to the adsorber Water vapor volume is regulated.
DE2847714A 1978-11-03 1978-11-03 Process for regenerating a solid adsorber Expired DE2847714C2 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE2847714A DE2847714C2 (en) 1978-11-03 1978-11-03 Process for regenerating a solid adsorber
JP14194179A JPS5567330A (en) 1978-11-03 1979-11-01 Method of regenerating solid adsorber

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2847714A DE2847714C2 (en) 1978-11-03 1978-11-03 Process for regenerating a solid adsorber

Publications (2)

Publication Number Publication Date
DE2847714A1 DE2847714A1 (en) 1980-05-08
DE2847714C2 true DE2847714C2 (en) 1984-06-28

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JP (1) JPS5567330A (en)
DE (1) DE2847714C2 (en)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4689054A (en) * 1986-01-07 1987-08-25 Vara International, Inc. Process for the removal an disposal of airborne contaminants from paint booths and the like
US5104545A (en) * 1989-12-15 1992-04-14 Nalco Chemical Company Process for removing water soluble organic compounds from produced water
US5135656A (en) * 1989-12-15 1992-08-04 Nalco Chemical Company Process for removing water soluble organic compounds from produced water
US5149342A (en) * 1991-04-17 1992-09-22 Calgon Carbon Corporation System for recovering solvents and disposing of contaminants released by regeneration of solvent laden air adsorber vessels
FR2691234A1 (en) * 1992-05-14 1993-11-19 Omia Destroying suspended particles by pyrolysis - in particular solvents in air from spray-paint facilities to regenerate the active carbon@ fibres
AT398044B (en) * 1992-12-09 1994-08-25 Kvt Verfahrenstech Gmbh METHOD AND DEVICE FOR PURIFYING THE EXHAUST GASES OF A DESORPTION STAGE LOADED WITH COMBUSTIBLE POLLUTANTS
US8142555B2 (en) 2004-08-19 2012-03-27 Ishikawajima-Harima Heavy Industries Co., Ltd. Method of treating volatile organic compound and system for treating volatile organic compound using gas turbine
JP3956993B1 (en) * 2006-01-30 2007-08-08 石川島播磨重工業株式会社 Volatile organic compound processing method and volatile organic compound processing system using gas turbine
JP3956996B1 (en) 2006-02-22 2007-08-08 石川島播磨重工業株式会社 Volatile organic compound treatment method and volatile organic compound treatment system
JP3948486B1 (en) * 2006-07-10 2007-07-25 石川島播磨重工業株式会社 Method for treating volatile organic compound, adsorption / desorption device, and system for treating volatile organic compound
DE102008047283A1 (en) * 2008-09-16 2010-04-15 Thermea. Energiesysteme Gmbh Steam generation plant for the regeneration of activated carbon filter of industrial exhaust air cleaning units that are used in gravure print shops for cleaning exhaust air of toluene, comprises a steam storage, and a cooling tower
CN106594787A (en) * 2017-01-24 2017-04-26 北京华泰焦化工程技术有限公司 Method and equipment for generating electricity by utilizing low-pressure saturated steam, and coking system

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE460471C (en) * 1924-09-16 1928-06-01 Metallbank & Metallurg Ges Ag Process for the improvement of the heat economy in the revitalization of adsorbents with superheated liquid vapors
DE2030153B2 (en) * 1970-06-19 1977-09-15 Ceagfilter Und Entstaubungstechnik Gmbh, 4600 Dortmund PROCESS FOR CLEANING A FLOW OF AIR OR GAS FROM COMBUSTIBLE STEAM OR GAS-FORM CONTAMINATION AND ADSORPTION FILTER SYSTEM FOR CARRYING OUT THE PROCESS

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Publication number Publication date
DE2847714A1 (en) 1980-05-08
JPS5567330A (en) 1980-05-21

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