DE3642468A1 - Simultaneous separation of SO2 and NOx in a system step with separate additive addition - Google Patents

Simultaneous separation of SO2 and NOx in a system step with separate additive addition

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Publication number
DE3642468A1
DE3642468A1 DE19863642468 DE3642468A DE3642468A1 DE 3642468 A1 DE3642468 A1 DE 3642468A1 DE 19863642468 DE19863642468 DE 19863642468 DE 3642468 A DE3642468 A DE 3642468A DE 3642468 A1 DE3642468 A1 DE 3642468A1
Authority
DE
Germany
Prior art keywords
dry
nox
simultaneous separation
additive addition
separated
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Withdrawn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
DE19863642468
Other languages
German (de)
Inventor
Erfinder Wird Nachtraeglich Benannt Der
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.)
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
Application filed by Individual filed Critical Individual
Priority to DE19863642468 priority Critical patent/DE3642468A1/en
Publication of DE3642468A1 publication Critical patent/DE3642468A1/en
Withdrawn legal-status Critical Current

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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
    • B01D53/34—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)
  • Gas Separation By Absorption (AREA)

Abstract

In order to minimise the additive addition of oxidants for the oxidation of NOx, NO, NO2 and SO2 from flue gases, it is proposed to add the oxidant or oxidants only in the last gas purification stage.

Description

Es ist bekannt, SO2 und NO x in einer simultanen Waschstufe abzuscheiden, indem man Kalk und Additive wie Permanganat, Wasserstoffsuperoxid zusetzt.It is known to separate SO 2 and NO x in a simultaneous washing stage by adding lime and additives such as permanganate and hydrogen peroxide.

Jedoch haben sich diese Verfahren nicht durchgesetzt, da der Aufwand an Additiv-Zugabe derart hoch ist, daß die Verfahren als unwirtschaftlich bezeichnet werden.However, these procedures have not prevailed because the amount of additive is so high that the Procedures can be described as uneconomical.

Erfindungsgemäß wird vorgeschlagen, in einem einzelnen Naßwäscher oder auch einer trockenen Gasreinigungsstufe zuerst so weit wie möglich das SO2 abzuscheiden, und als letzte Einsprühdüsenanordnung hinter der Einsprühdüsen­ anordnung für die SO2-Bindung ein Oxidationsmittel zur NO x -, NO- und NO2-Oxidation und anschließenden Abscheidung zu Nitrat einzudüsen. According to the invention, it is proposed to first separate the SO 2 as far as possible in a single wet scrubber or a dry gas cleaning stage, and as the last spray nozzle arrangement behind the spray nozzle arrangement for the SO 2 binding, an oxidizing agent for NO x , NO and NO 2 . Oxidation and subsequent deposition to nitrate.

Bevorzugt wird erfindungsgemäß H2O2 als umweltfreundliches Oxidationsmittel eingesetzt.According to the invention, H 2 O 2 is preferably used as an environmentally friendly oxidizing agent.

Durch diese erfindungsgemäße Tatsache in bereits bestehen­ den Wäschern oder bereits bestehenden trockenen SO2, HCl und HF-Abscheidungsanlagen ist eine wirtschaftliche Möglichkeit zum Nachrüsten in bestehenden Anlagen gegeben.This fact according to the invention in the already existing scrubbers or already existing dry SO 2 , HCl and HF separation systems provides an economical possibility for retrofitting in existing systems.

Selbstverständlich ist die Erfindung nicht auf die vor­ stehend im einzelnen beschriebenen und dargestellten Ausbildungsformen beschränkt, sondern es sind zahlreiche Abänderungen möglich, ohne jedoch von dem Grundgedanken abzuweichen, eine simultane Abscheidung von SO2 und NO x trocken- oder naßtechnisch so zu vollziehen, daß das SO2 soweit wie möglich vorher tunlichst in einem Wäscher oder trockenen Kontaktreaktorsystem abgeschieden wird, und das noch frei-wirkende NO x und das noch frei im Gas sich befindende SO2 durch H2O2 oxidiert und in NO2 und SO3 gewandelt wird und mit dem nachgesetzten nassen oder trockenen Abscheider als Nitrat in der Flüssigphase bzw. als Salz in der Trockenphase abgeschieden wird.Of course, the invention is not limited to the training forms described and shown in detail above, but there are numerous modifications possible, but without deviating from the basic idea of performing a simultaneous separation of SO 2 and NO x dry or wet so that So far as possible, SO 2 is deposited beforehand in a scrubber or dry contact reactor system, and the still free-acting NO x and the SO 2 still free in the gas are oxidized by H 2 O 2 and converted into NO 2 and SO 3 and with the added wet or dry separator as nitrate in the liquid phase or as salt in the dry phase.

In der Zeichnung sind erfindungsgemäße Ausführungen dargestellt:In the drawing are according to the invention Executions shown:

mit (1) ein Gegenstromwascher;
mit (2) ein Gleich- und Gegenstromwascher;
mit (3) ein Gleichstromwascher bzw.
mit (4) ein Chemisorptionsfilter,with ( 1 ) a countercurrent washer;
with ( 2 ) a cocurrent and countercurrent washer;
with ( 3 ) a DC washer or
with ( 4 ) a chemisorption filter,

wobei in allen Abscheidern erkennbar ist, daß immer das H2O2 in der letzten Düsenebene in Gasrichtung wirksam wird, egal, ob trockentechnisch, halbtrocken- oder naßtechnisch.whereby it can be seen in all separators that the H 2 O 2 is always effective in the gas direction in the last nozzle plane, regardless of whether it is dry, semi-dry or wet.

Claims (2)

1. Verfahren zur simultanen Abscheidung von SO2 und NO x in einem Abscheide-System, dadurch gekennzeichnet, daß die sauren Bestandteile wie SO2, HCl, HF vorher naß­ technisch, halbtrocken- oder trockentechnisch aus dem Gas soweit wie möglich abgeschieden werden, und danach in Gasrichtung mit einer weiteren Düsenebene das umwelt­ freundliche H2O2 als Oxidationsmittel für NO x und Reststoffe SO2 eingesetzt und mit den gesamten naß und/ oder trocken abzuscheidenden Mengen aus dem Gasstrom abgetrennt wird.1. A method for the simultaneous separation of SO 2 and NO x in a separation system, characterized in that the acidic components such as SO 2 , HCl, HF are previously separated as far as possible from a technical, semi-dry or dry technology standpoint, and then the environmentally friendly H 2 O 2 is used as an oxidizing agent for NO x and residues SO 2 in the gas direction with a further nozzle level and is separated from the gas stream with the entire amount to be separated wet and / or dry. 2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß nicht nur Wasserstoffsuperoxid als nachgesetztes Oxidations­ mittel für die NO x -Reduzierung eingesetzt werden kann, sondern auch ähnlich wirkende Oxidationsmittel, jedoch gemäß der Erfindung stetig als letzte Einsprühebene hinter der SO2-, HCl- und HF-Abscheidung.2. The method according to claim 1, characterized in that not only hydrogen superoxide can be used as a subsequent oxidizing agent for the NO x reduction, but also similarly acting oxidizing agents, but according to the invention as the last spraying level behind the SO 2 -, HCl- and RF deposition.
DE19863642468 1986-11-26 1986-11-26 Simultaneous separation of SO2 and NOx in a system step with separate additive addition Withdrawn DE3642468A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19863642468 DE3642468A1 (en) 1986-11-26 1986-11-26 Simultaneous separation of SO2 and NOx in a system step with separate additive addition

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19863642468 DE3642468A1 (en) 1986-11-26 1986-11-26 Simultaneous separation of SO2 and NOx in a system step with separate additive addition

Publications (1)

Publication Number Publication Date
DE3642468A1 true DE3642468A1 (en) 1988-06-09

Family

ID=6316046

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19863642468 Withdrawn DE3642468A1 (en) 1986-11-26 1986-11-26 Simultaneous separation of SO2 and NOx in a system step with separate additive addition

Country Status (1)

Country Link
DE (1) DE3642468A1 (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0457059A1 (en) * 1990-05-12 1991-11-21 Degussa Aktiengesellschaft Process for removal of nitrogen oxides producing HNO3
DE4035944A1 (en) * 1990-11-09 1992-05-14 Fette Dietrich Arrangement for jets in smoke cleaning plant - increasing reaction vol with gases entering elbow joint with jet on longitudinal axis
EP0532841A1 (en) * 1991-09-19 1993-03-24 Ente Nazionale Per L'energia Elettrica - (Enel) A method and plant for removing pollutants from a combustion gas
DE4216772A1 (en) * 1992-05-21 1993-12-16 Ftu Forschung Und Tech Entwick Pre-purified gas or waste gas denitrification - by oxidising nitric oxide to nitrogen di:oxide or nitric acid with hydrogen peroxide and absorption on calcium hydroxide powder, avoiding di:nitrogen oxide formation
EP0548499B1 (en) * 1991-11-02 1995-09-13 Degussa Aktiengesellschaft Process for the oxidative purification of nitrogen oxides containing exhaust gases
CN111744330A (en) * 2020-05-25 2020-10-09 山东清创化工有限公司 Desulfurization and denitrification cooperative absorption integrated equipment and method

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0457059A1 (en) * 1990-05-12 1991-11-21 Degussa Aktiengesellschaft Process for removal of nitrogen oxides producing HNO3
DE4035944A1 (en) * 1990-11-09 1992-05-14 Fette Dietrich Arrangement for jets in smoke cleaning plant - increasing reaction vol with gases entering elbow joint with jet on longitudinal axis
DE4035944C2 (en) * 1990-11-09 2001-03-29 Fette Dorothea Arrangement for nozzles in flue gas cleaning systems
EP0532841A1 (en) * 1991-09-19 1993-03-24 Ente Nazionale Per L'energia Elettrica - (Enel) A method and plant for removing pollutants from a combustion gas
EP0548499B1 (en) * 1991-11-02 1995-09-13 Degussa Aktiengesellschaft Process for the oxidative purification of nitrogen oxides containing exhaust gases
DE4216772A1 (en) * 1992-05-21 1993-12-16 Ftu Forschung Und Tech Entwick Pre-purified gas or waste gas denitrification - by oxidising nitric oxide to nitrogen di:oxide or nitric acid with hydrogen peroxide and absorption on calcium hydroxide powder, avoiding di:nitrogen oxide formation
CN111744330A (en) * 2020-05-25 2020-10-09 山东清创化工有限公司 Desulfurization and denitrification cooperative absorption integrated equipment and method

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