DE3318407A1 - Semi-dry flue gas desulphurisation process having CaSO4 as end product with simultaneous separation of NOx - Google Patents

Semi-dry flue gas desulphurisation process having CaSO4 as end product with simultaneous separation of NOx

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Publication number
DE3318407A1
DE3318407A1 DE19833318407 DE3318407A DE3318407A1 DE 3318407 A1 DE3318407 A1 DE 3318407A1 DE 19833318407 DE19833318407 DE 19833318407 DE 3318407 A DE3318407 A DE 3318407A DE 3318407 A1 DE3318407 A1 DE 3318407A1
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Germany
Prior art keywords
flue gas
semi
caso4
dry
nox
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Withdrawn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
DE19833318407
Other languages
German (de)
Inventor
Heribert Dipl.-Ing. 4390 Gladbeck Dewert
Heinrich Ing.(grad.) 4600 Dortmund Gresch
Heinz Dipl.-Ing. Hölter
Heinrich Dipl.-Ing. 4390 Gladbeck Igelbüscher
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Individual
Original Assignee
Individual
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
Priority claimed from DE19833313496 external-priority patent/DE3313496A1/en
Application filed by Individual filed Critical Individual
Priority to DE19833318407 priority Critical patent/DE3318407A1/en
Publication of DE3318407A1 publication Critical patent/DE3318407A1/en
Withdrawn legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
    • C01F11/00—Compounds of calcium, strontium, or barium
    • C01F11/46—Sulfates
    • C01F11/464—Sulfates of Ca from gases containing sulfur oxides
    • 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
    • B01D53/48—Sulfur compounds
    • B01D53/50—Sulfur oxides
    • B01D53/501—Sulfur oxides by treating the gases with a solution or a suspension of an alkali or earth-alkali or ammonium compound
    • 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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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • General Chemical & Material Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • Biomedical Technology (AREA)
  • Analytical Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Organic Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Inorganic Chemistry (AREA)
  • Treating Waste Gases (AREA)

Abstract

In a semi-dry flue gas desulphurisation process, in which the flue gas is added to pulverulent lime in a reaction section, which lime is separated by a filter from the flue gas following the reaction, prior to addition of the lime, a liquid is added in the reaction section, which liquid contains organic acids, or salts thereof, such as for example lactic acid. In order also to enable or to facilitate the separation of nitrogen oxides from the flue gas, alkali metal lactates, for example sodium lactate, and/or ethylenediaminetetraacetic acid are added to the liquid.

Description

Beschreibung und Erläuterung zur Zusatz-Patentanmeldung ~Halbtrockenes Rauchgasentschwefelungsverfahren mit Endprodukt CaS04 und gleichzeitiger NO Abscheidung Zusatzpatentanmeldung zu P 33 13 496.0 In der Hauptanmeldung P 33 13 496.0 wird ein Rauchgasentschwefelungsverfahren zur Entschwefelung von vorzugsweise Fossilkraftwerken mittels halbtrockener Chemisorption und gleichzeitigem Endproduktaustrag CaSO4 . 2H20 beschrieben.Description and explanation of the additional patent application ~ semi-dry Flue gas desulfurization process with the end product CaS04 and simultaneous NO separation Additional patent application to P 33 13 496.0 In the main application P 33 13 496.0 becomes a flue gas desulfurization process for desulfurization of preferably fossil power plants by means of semi-dry chemisorption and simultaneous discharge of the end product CaSO4. 2H20 described.

Die erfindungsgemäße Ausführung liegt im besonderen Merkmal, daß ein Trockenadditiv mittels ein- und/oder mehrbasischer Carbonsäuren bzw.The embodiment of the invention lies in the special feature that a Dry additive by means of mono- and / or polybasic carboxylic acids respectively.

deren Salze und/oder organischen Säuren und/oder deren Salze angereichert wird und in einer Reaktorstrecke mit dem zu entschwefelnden Rauchgas halbtrocken konfrontiert wird, und die Feuchte auf dem Weg der Kontaktierung mit dem Additiv und den Säuren eine Chemisorption durchführt, wobei vorzugsweise Milchsäure und/ oder anorganische Säure und/oder deren Salze angew#andt werden, wobei auf dem Wege der Trocknung hinter dem Filterabscheider z.B. Milchsäure als Salz anfällt und in einem Behälter durch Zugabe von Flüssigkeit mit dem Kalkhydrat, das zu CaSO3 und CaSO4 gewandelt wurde, zusätzlich zu CaS04 auf oxidiert wird und über einen Trommel= vakuumfilter oder über eine Zentrifuge von der Flüssigkeit getrennt als Gips ausgeschleust wird, wobei die Flüssigkeit, die die Säure beinhaltet, wieder mit z.B. Kalkhydrat neutralisiert wird, um in einer Reaktorstrecke oder einem Reaktordie Chemisorption von S02 zu CaSO4 . 2H20 incl.their salts and / or organic acids and / or their salts enriched becomes semi-dry and in a reactor section with the flue gas to be desulfurized is confronted, and the moisture on the way of contacting the additive and the acids perform chemisorption, preferably lactic acid and / or inorganic acid and / or salts thereof are applied, with on the way the drying process behind the filter separator, e.g. lactic acid is obtained as salt and is used in a container by adding liquid with the hydrated lime, which becomes CaSO3 and CaSO4 was converted, in addition to CaS04 being oxidized and over a drum = Vacuum filter or separated from the liquid via a centrifuge as gypsum the liquid containing the acid again with e.g. hydrated lime is neutralized, around in a reactor section or a reactor die Chemisorption of S02 to CaSO4. 2H20 incl.

der oxidativen Phase durchzuführen, ohne daß Säure zusätzlich verwandt wird, da die zugegebene erfindungsgemäße Carbonsäure bzw. deren Salze oder die organische Säure oder deren Salze zur pH-Wert-Erniedrigung im Bereich vorzugsweise um (4). -siehe Hauptanmeldung P 33 13 496.0 - in der oxidativen Phase beitragen.carry out the oxidative phase without acid being used in addition is, since the added carboxylic acid according to the invention or its salts or the organic Acid or its salts for lowering the pH value in the range preferably around (4). - see main application P 33 13 496.0 - contribute in the oxidative phase.

Ein weiterer erfindungsgemäßer Gedanke dieser Zusatzanmeldungist durch die Zugabe von Alkalilaktaten, z.B. Natriumlaktat bzw. und/oder durch die Zugabe von Athyl-Diamin-Tetra-Essigsäure zur z.B. Kalkmilch gegeben, wobei NO, in elementaren Schwefel abgebaut wird und zwar im Bereich der trockenen oder halbtrockenen Chemisorption von S02, HCl und HF bei gleichzeitizer Wandlung des NO in elementaren, nicht umweltschädigenden Stickstoff.Another inventive concept of this co-application is through the addition of alkali lactates, e.g. sodium lactate or and / or through the addition of ethyl-diamine-tetra-acetic acid added to e.g. milk of lime, with NO, in elementary Sulfur is broken down in the area of dry or semi-dry chemisorption of S02, HCl and HF with simultaneous conversion of NO into elementary, non-polluting Nitrogen.

Ziisatz-Patentanspruch: Ziisatz patent claim:

Claims (1)

Zusatz-Patent anspruch: Verfahren zur Abscheidung von sauren Bestandteilen aus Rauchgasentschwefelungsanlagen, wie 502, HOi und HF und gleichzeitigem Abscheiden von NOx mittels trockenen Chemisorbentien, die nur soweit angefeuchtet sind, daß die Temperatur nicht unter Taupunktstemperatur abgesenkt wird, dadurch gekennzeichnet, daß dem trockenen Chemisorptionsmittel, z.B. Kalkhydrat, ein- und/oder mehrbasische Carbonsäuren bzw. deren Salze und/oder organische Säuren und/oder deren Salze und fi EDTA zugeführt werden und im Kreislaufverfahren entsprechend der Hauptanmeldung nach der Entwässerung des CaSO4 0 2H20 mit der zurückgewonnenen Flüssigkeit und neuem Kalkhydrat der chemischen Reinigung und zur kata?ytischen Wirkung dem Kontakt zum Rauchgas wieder zugeführt werdenAdditional patent claim: Process for separating acidic components from flue gas desulphurisation systems such as 502, HOi and HF and simultaneous separation of NOx by means of dry chemisorbents that are only moistened to the extent that the temperature is not lowered below the dew point temperature, characterized in that that the dry chemisorbent, e.g. hydrated lime, is monobasic and / or polybasic Carboxylic acids or their salts and / or organic acids and / or their salts and fi EDTA are supplied and in the circular process according to the main application after dewatering the CaSO4 0 2H20 with the recovered liquid and new hydrated lime of chemical cleaning and catalytic effect on contact to be fed back to the flue gas
DE19833318407 1983-04-14 1983-05-20 Semi-dry flue gas desulphurisation process having CaSO4 as end product with simultaneous separation of NOx Withdrawn DE3318407A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19833318407 DE3318407A1 (en) 1983-04-14 1983-05-20 Semi-dry flue gas desulphurisation process having CaSO4 as end product with simultaneous separation of NOx

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19833313496 DE3313496A1 (en) 1983-04-14 1983-04-14 Semi-dry flue gas desulphurisation process, preferably for fossil fuel power stations
DE19833318407 DE3318407A1 (en) 1983-04-14 1983-05-20 Semi-dry flue gas desulphurisation process having CaSO4 as end product with simultaneous separation of NOx

Publications (1)

Publication Number Publication Date
DE3318407A1 true DE3318407A1 (en) 1984-11-22

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3539436A1 (en) * 1985-09-26 1987-05-14 Hoelter Heinz Dry NOx separation method, preferably for fluidised-bed furnaces
DE3543531A1 (en) * 1985-12-10 1987-10-15 Saxonlord Ltd Process for cleaning waste gases, flue gases and combustion gases
CN107281898A (en) * 2016-03-31 2017-10-24 北京化工大学 A kind of alkali metal lactate aqueous solution sulfur dioxide absorption and the process of regeneration

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2539500A1 (en) * 1975-09-05 1977-03-17 Heinz Hoelter Filtration of dust from gases with acidic components - e.g. waste gas from cupolas, or contg. sulphur dioxide, hydrogen sulphide, fluorine etc.
DE2532373B2 (en) * 1975-07-19 1978-12-21 Heinz 4390 Gladbeck Hoelter Method and device for cleaning flue gases and other exhaust gases containing sulfur dioxide

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2532373B2 (en) * 1975-07-19 1978-12-21 Heinz 4390 Gladbeck Hoelter Method and device for cleaning flue gases and other exhaust gases containing sulfur dioxide
DE2539500A1 (en) * 1975-09-05 1977-03-17 Heinz Hoelter Filtration of dust from gases with acidic components - e.g. waste gas from cupolas, or contg. sulphur dioxide, hydrogen sulphide, fluorine etc.

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3539436A1 (en) * 1985-09-26 1987-05-14 Hoelter Heinz Dry NOx separation method, preferably for fluidised-bed furnaces
DE3543531A1 (en) * 1985-12-10 1987-10-15 Saxonlord Ltd Process for cleaning waste gases, flue gases and combustion gases
CN107281898A (en) * 2016-03-31 2017-10-24 北京化工大学 A kind of alkali metal lactate aqueous solution sulfur dioxide absorption and the process of regeneration

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