DE3725556A1 - Adsorbent for combustion flue gas purificn. - esp. desulphurisation and denitrification, contg. unburnt constituents of coal ash - Google Patents

Adsorbent for combustion flue gas purificn. - esp. desulphurisation and denitrification, contg. unburnt constituents of coal ash

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Publication number
DE3725556A1
DE3725556A1 DE3725556A DE3725556A DE3725556A1 DE 3725556 A1 DE3725556 A1 DE 3725556A1 DE 3725556 A DE3725556 A DE 3725556A DE 3725556 A DE3725556 A DE 3725556A DE 3725556 A1 DE3725556 A1 DE 3725556A1
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Prior art keywords
adsorbent
ash
ashes
adsorption
esp
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Ceased
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DE3725556A
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German (de)
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Erfinder Wird Nachtraeglich Benannt Der
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Individual
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Individual
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Priority to DE3725556A priority Critical patent/DE3725556A1/en
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    • 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
    • B01D53/46—Removing components of defined structure
    • B01D53/60—Simultaneously removing sulfur oxides and nitrogen oxides
    • 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
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
    • Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters

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

Abstract

Adsorbent forpurifying flue gases from combustion plants, esp. for reducing their SO2 and/or NOx content, consists of the unburnt constituents (I) of the ash from the coal burnt in the plant. The adsorbent is wet and/or boiler ash; or dry ash from the first, middle or last electrofilters; or ash from the empty flues. It is enriched to a (I) content of 20-100%. (I) have various grain fractions (a) 0.1-20 mm and/or (b) 0.1-1mm and/or (c) 1-10mm and/or (d) 10-20mm. USE/ADVANTAGE - This adsorbent is claimed for use in waste gas filters, pref. of nuclear power stations. The ash has a relatively large surface area and at least as good adsorption properties as usual, esp. blast furnace coke. It contains no CaO and hence can be utilised more than blast furnace coke, which contains 50-60 wt.% CaO.

Description

Die Erfindung betrifft eine Adsorptionsmasse zur Reinigung der Rauchgase von Verbrennungsanlagen, insbesondere zur Reduzierung des SO₂- und/oder NO x -Gehaltes derselben.The invention relates to an adsorbent for cleaning the flue gases from combustion plants, in particular for reducing the SO₂ and / or NO x content thereof.

Es ist bekannt, in Reaktoren hinter Verbrennungsanlagen als Adsorptionsmassen zur Abgasreinigung Aktivkohle oder Aktivkoks zu verwenden. Die Herstellung dieser Adsorp­ tionsmassen erweist sich jedoch als vergleichsweise auf­ wendig, ganz abgesehen davon, daß Aktivkoks (Herdofen­ koks) Calciumoxid enthält, welches die Effektivität des Kokses durch Gipsbildung verringert.It is known in reactors behind incinerators as adsorption masses for exhaust gas cleaning activated carbon or To use activated coke. The manufacture of this adsorp tion masses proves to be comparatively agile, quite apart from the fact that activated coke (hearth furnace coke) contains calcium oxide, which affects the effectiveness of the Coke reduced due to the formation of gypsum.

Von diesem Stand der Technik ausgehend liegt der Erfin­ dung die Aufgabe zugrunde, eine Adsorptionsmasse der eingangs genannten Art zu schaffen, welche nicht nur über eine hohe Reinigungswirkung verfügt, sondern auch in einfacher und wohlfeiler Weise herstellbar ist.The Erfin is based on this state of the art tion based on the task of an adsorption mass to create the kind mentioned above, which not only has a high cleaning effect, but can also be produced in a simple and inexpensive manner.

Erfindungsgemäß wird dies dadurch erreicht, daß die Adsorptionsmasse aus unverbrannten Bestandteilen der Aschen der in den Verbrennungsanlagen verbrannten Kohle­ brennstoffen besteht. In den Aschen von mit Steinkohle oder Braunkohle befeuerten Verbrennungskesseln finden sich koksförmige Ascherückstände, welche die Deponierung der Aschen erheblich erschweren. Durch den erfindungsge­ mäßen Vorschlag ist eine Nutzung der unverbrannten Be­ standteile der Aschen aus Kohleverbrennungsanlagen mög­ lich, so daß deren diesbezügliche Deponieprobleme ge­ löst werden und darüber hinaus ein hochwirksames Ad­ sorbenz geschaffen wird, mit dem die angestrebte Rei­ nigungswirkung der Abgase erreicht wird. Es hat sich über­ raschend gezeigt, daß die unverbrannten Bestandteile der Aschen vergleichsweise große Oberflächen besitzen, welche mindestens zu gleichen Adsorptionseigenschaften führen wie der bisher Verwendung findende, besonders herzustellen­ de Herdofenkoks. Außerdem weisen die unverbrannten Be­ standteile der Aschen keine Calciumoxid-Gehalte auf, so daß ein höherer Ausnutzungsgrad gegenüber Herdofenkoks erreichbar ist, welcher ca. 50-60 Gew.% CaO enthält.According to the invention this is achieved in that the Adsorption mass from unburned components of the Ashes of the coal burned in the incinerators  fuel exists. In the ashes of coal or lignite-fired combustion boilers coke-shaped ash residue, which is the landfill make the ashes considerably more difficult. By the fiction The proposal is to use the unburned be parts of the ashes from coal incineration plants possible Lich, so that ge related landfill problems be solved and also a highly effective ad sorbenz is created with which the desired Rei cleaning effect of the exhaust gases is achieved. It has over surprisingly shown that the unburned components of the Ashes have comparatively large surfaces, which lead to at least the same adsorption properties as previously used, especially to produce de Oven coke. In addition, the unburned Be parts of the ashes no calcium oxide contents, so that a higher degree of utilization compared to hearth furnace coke can be achieved which contains approx. 50-60% by weight CaO.

Vorteilhaft können als Adsorptionsmasse Naß- und/oder Kes­ selaschen, die Trockenaschen der Vor- und/oder Mittel- und/ oder Nachreinigung von Elektrofiltern der Verbrennungsanla­ gen, die unverbrannten Bestandteile der Aschen aus den Leer­ zügen od.dgl. Verwendung finden. Wet and / or kes can advantageously be used as the adsorption mass ashes, the dry ashes of the front and / or middle and / or after-cleaning of electrostatic filters of the incineration plant gen, the unburned components of the ashes from the void trains or the like Find use.  

Gemäß einem weiteren Merkmal der Erfindung sind die unverbrannten Bestandteile der Aschen auf 20-100% ange­ reichert, was durch Windsichtung, Flotation, Siebung usw. erfolgen kann.According to a further feature of the invention, the unburned constituents of the ashes to 20-100% enriches what through wind sifting, flotation, sieving, etc. can be done.

Weiterhin können die unverbrannten Bestandteile der Aschen aus verschiedenen Kornfraktionen, vorzugsweiseFurthermore, the unburned components of the Ashes from different grain fractions, preferably

  • a) von 0,1-20 mm und/odera) from 0.1-20 mm and / or
  • b) von 0,1-1 mm und/oderb) from 0.1-1 mm and / or
  • c) von 1-10 mm und/oderc) from 1-10 mm and / or
  • d) von 10-20 mm aus Naß- und/oder Trockenasched) from 10-20 mm from wet and / or dry ash

bestehen, um eine höchstmögliche Aufnahme der schäd­ lichen Anteile der Abgase zu erreichen.insist on the highest possible absorption of the damage to achieve proportions of exhaust gases.

Die erfindungsgemäße Adsoprtionsmasse eignet sich auch zur Verwendung in Abluftfiltern, vorzugsweise im kern­ technischen Bereich, von Kernkraftwerken, anstelle der hier bisher eingesetzten Aktivkohle.The adsorption composition according to the invention is also suitable for use in exhaust air filters, preferably in the core technical area, of nuclear power plants, instead of Activated carbon used here so far.

Die Adsorptionsmasse nach der Erfindung bewirkt eine Reinigung der Abgase von Verbrennungsanlagen von SO₂, NO x , Halogeniden sowie geruchsbelästigenden Stoffen.The adsorbent mass according to the invention causes a cleaning of the exhaust gases from combustion plants of SO₂, NO x , halides and odor-causing substances.

Da die Adsorptionsmasse ein Abfallprodukt darstellt, aber dennoch zumindestens die gleichen Eigenschaften wie die bisher für diesen Zweck eingesetzten Stoffe aufweist, stellt die erfindungsgemäße Adsorptionsmasse eine außer­ ordentlich wohlfeile Lösung für die Abgasreinigung dar.Since the adsorption mass is a waste product, but at least the same properties as  contains the substances previously used for this purpose, represents the adsorption mass according to the invention except neatly cheap solution for exhaust gas purification.

Claims (8)

1. Adsorptionsmasse zur Reinigung der Rauchgase von Verbrennungsanlagen, insbesondere zur Reduzierung des SO₂- und/oder NO x -Gehaltes derselben, dadurch gekenn­ kennzeichnet, daß diese aus unverbrannten Bestandteilen der Aschen der in den Verbrennungsanlagen verbrannten Kohlebrennstoffen besteht.1. adsorbent for cleaning the flue gases from combustion plants, in particular to reduce the SO₂ and / or NO x content thereof, characterized in that it consists of unburned constituents of the ashes of the coal fuels burned in the combustion plants. 2. Adsorptionsmasse nach Anspruch 1, dadurch gekenn­ zeichnet, daß als Adsorptionsmasse Naß- und/oder Kessel­ asche Verwendung findet.2. Adsorption composition according to claim 1, characterized records that as adsorbent wet and / or boiler ash is used. 3. Adsorptionsmasse nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die Adsorptionsmasse aus Trocken­ asche der Vor- und/oder Mittel- und/oder Nachreinigung von Elektrofiltern der Verbrennungsanlagen besteht.3. adsorption composition according to claim 1 or 2, characterized characterized in that the adsorption mass from dry  ash of pre- and / or middle and / or post-cleaning of electrostatic filters of the incineration plants. 4. Adsorptionsmasse nach einem der vorhergehenden An­ sprüche, dadurch gekennzeichnet, daß als Adsorptions­ masse die unverbrannten Bestandteile der Aschen aus den Leerzügen Verwendung finden.4. Adsorption mass according to one of the preceding An sayings, characterized in that as adsorption measure the unburned ashes from the ashes Empty trains are used. 5. Adsorptionsmasse nach einem der vorhergehenden An­ sprüche, dadurch gekennzeichnet, daß die unverbrannten Bestandteile der Aschen auf 20-100% angereichert sind.5. Adsorbent mass according to one of the preceding An sayings, characterized in that the unburned Components of the ashes are enriched to 20-100%. 6. Adsorptionsmasse nach einem der vorhergehenden An­ sprüche, dadurch gekennzeichnet, daß die unverbrannten Bestandteile der Aschen aus verschiedenen Kornfraktionen
  • a) von 0,1-20 mm und/oder
  • b) von 0,1-1 mm und/oder
  • c) von 1-10 mm und/oder
  • d) von 10-20 mm aus Naß- und/oder Trockenasche
6. Adsorption composition according to one of the preceding claims, characterized in that the unburned constituents of the ashes from different grain fractions
  • a) from 0.1-20 mm and / or
  • b) from 0.1-1 mm and / or
  • c) from 1-10 mm and / or
  • d) from 10-20 mm from wet and / or dry ash
bestehen.consist. 7. Verwendung der Adsorptionsmasse nach Anspruch 1 oder einem der vorhergehenden in Abluftfiltern, vorzugsweise im kerntechnischen Bereich, von Kernkraftwerken.7. Use of the adsorption composition according to claim 1 or one of the previous in exhaust filters, preferably in nuclear area, of nuclear power plants.
DE3725556A 1987-03-12 1987-08-01 Adsorbent for combustion flue gas purificn. - esp. desulphurisation and denitrification, contg. unburnt constituents of coal ash Ceased DE3725556A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE3725556A DE3725556A1 (en) 1987-03-12 1987-08-01 Adsorbent for combustion flue gas purificn. - esp. desulphurisation and denitrification, contg. unburnt constituents of coal ash

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3707982 1987-03-12
DE3725556A DE3725556A1 (en) 1987-03-12 1987-08-01 Adsorbent for combustion flue gas purificn. - esp. desulphurisation and denitrification, contg. unburnt constituents of coal ash

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DE3725556A1 true DE3725556A1 (en) 1988-09-22

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4427899A1 (en) * 1994-08-06 1996-02-08 Abb Research Ltd Process for the treatment of residues in waste incineration plants
CN105854505A (en) * 2016-06-14 2016-08-17 内蒙古阜丰生物科技有限公司 Flue gas desulfurization and denitrification method in amino acid production process

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE593383C (en) * 1931-10-02 1934-02-24 Metallgesellschaft Ag Process for removing sulfur dioxide from gases containing such
DE2337604A1 (en) * 1972-08-10 1974-02-28 Foster Wheeler Corp PROCESS FOR THE REDUCTION OF SULFUR DIOXIDE
DE3512169A1 (en) * 1985-04-03 1986-10-09 Bergwerksverband Gmbh, 4300 Essen CATALYSTS FOR EMISSION OF NITROGEN FROM EXHAUST GAS

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE593383C (en) * 1931-10-02 1934-02-24 Metallgesellschaft Ag Process for removing sulfur dioxide from gases containing such
DE2337604A1 (en) * 1972-08-10 1974-02-28 Foster Wheeler Corp PROCESS FOR THE REDUCTION OF SULFUR DIOXIDE
DE3512169A1 (en) * 1985-04-03 1986-10-09 Bergwerksverband Gmbh, 4300 Essen CATALYSTS FOR EMISSION OF NITROGEN FROM EXHAUST GAS

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
DE-Z: Chem.-Ing.-Techn.57, 1985, Nr.3, S.239-241 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4427899A1 (en) * 1994-08-06 1996-02-08 Abb Research Ltd Process for the treatment of residues in waste incineration plants
CN105854505A (en) * 2016-06-14 2016-08-17 内蒙古阜丰生物科技有限公司 Flue gas desulfurization and denitrification method in amino acid production process

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