DE3441339A1 - Scrubber for simultaneous elimination of SO2 and NOx in a single-stage construction - Google Patents

Scrubber for simultaneous elimination of SO2 and NOx in a single-stage construction

Info

Publication number
DE3441339A1
DE3441339A1 DE19843441339 DE3441339A DE3441339A1 DE 3441339 A1 DE3441339 A1 DE 3441339A1 DE 19843441339 DE19843441339 DE 19843441339 DE 3441339 A DE3441339 A DE 3441339A DE 3441339 A1 DE3441339 A1 DE 3441339A1
Authority
DE
Germany
Prior art keywords
scrubber
nox
flue gases
stage construction
scrubbing liquid
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Withdrawn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
DE19843441339
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
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 DE19843441339 priority Critical patent/DE3441339A1/en
Priority to AU38857/85A priority patent/AU569775B2/en
Priority to EP85900664A priority patent/EP0168453A1/en
Priority to US06/781,235 priority patent/US4670234A/en
Priority to PCT/EP1985/000018 priority patent/WO1985003238A2/en
Priority to IT19231/85A priority patent/IT1199650B/en
Priority to DD85272832A priority patent/DD233949A5/en
Publication of DE3441339A1 publication Critical patent/DE3441339A1/en
Withdrawn legal-status Critical Current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
    • B01D53/34—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

Landscapes

  • 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

In order to be able to carry out simultaneous scrubbing of SO2 and NOx from flue gases of fossil fuel-fired boilers even using a single-stage scrubber, regardless of whether it is configured as a countercurrent or cocurrent scrubber, according to the invention it is proposed to feed a scrubbing liquid having a pH of preferably below 4 to a first nozzle plane (A, B, C) of the scrubber (1), which first comes into contact with the flue gases, and to feed a scrubbing liquid having a pH preferably above 5 to a second nozzle plane (D, E, F), which subsequently comes into contact with the flue gases, the residence time of the scrubbing liquid in the sump (5) of the scrubber (1) being at least 10 minutes. <IMAGE>

Description

Beschreibung und Erläuterung zur PatentanmeldungDescription and explanation of the patent application

Wäscher für simultane SO2- und NOx-Ausscheidung in einstufiger Bauweise Es ist bekannt, daß mit einstufigen Wäschern simultan SO, und NO ausgewaschen werden soll.Scrubber for simultaneous SO2 and NOx separation in a single-stage design It is known that SO and NO are washed out simultaneously with single-stage washers target.

Der Erfolg ist nicht zufriedenstellend.The success is not satisfactory.

Erfindungsgemäß wird daher vorgeschlagen, in dem einstufigen Wäscher, egal ob er als Gegenstrom-oder Gleichstromwäscher ausgebildet ist, die Zone, die mit dem S02 zuerst kontaktiert wird, sauer einzustellen, damit das Mol-Verhältnis von S02 zu NO, bei der NO -Fahrung tunlichst hoch zugunsten des S02 liegt.According to the invention it is therefore proposed that in the single-stage scrubber, regardless of whether it is designed as a countercurrent or cocurrent washer, the zone that Contacted with the S02 first, set acidic so the mole ratio from S02 to NO, where NO is as high as possible in favor of S02.

Im danachgeschalteten Teil wird zweckdienlicherweise das Waschwasser einem höheren pH-Wert zugegeben, z.B. größer pH 5, um dadurch das S02 und Restspuren von NOx auf den vorgeschriebenen Wert auszuwaschen.In the next part, it is expedient the Wash water with a higher pH value added, e.g. greater than pH 5, in order to reduce the S02 and to wash out residual traces of NOx to the prescribed level.

Aus diesem Grunde ist die erfindungsgemäße Vorrichtung entsprechend beiliegender Zeichnung herzurichten: Mit (1) ist ein Wäscher dargestellt mit drei Düseneinsätzen A, B, C, die von dem Behälter (2) gespeist werden im oberen Bereich und drei weiteren Düsen D, E, F im Bereich (3), die mit einer Waschflüssigkeit aus dem Behälter (4) gespeist werden. Der Sumpf ist mit (5) dargestellt.For this reason, the device according to the invention is corresponding To prepare the enclosed drawing: With (1) a washer is shown with three Nozzle inserts A, B, C, which are fed from the container (2) in the upper area and three further nozzles D, E, F in area (3), which are made with a washing liquid the container (4) are fed. The sump is shown with (5).

Kalkhydrat oder Kalkstein wird bevorzugt zur unterschiedlichen pH-Einstellung sowohl in den Behälter für die obere Düsenebene als auch für die untere Düsenebene zugegeben. Jedoch wird der pH-Wert oben auf vorzugsweise kleiner pH 4 gehalten und die nachfolgenden Düsen auf vorzugsweise größer pH 5.Hydrated lime or limestone is preferred for different pH adjustment both in the container for the upper nozzle level and for the lower nozzle level admitted. However, the pH is kept above and preferably lower than pH 4 the following nozzles to preferably greater than pH 5.

Weiterhin wird erfindungsgemäß vorgeschlagen, die Verweilzeit in dem nachgeschalteten Wäschersumpf so groß zu gestalten, daß diese mindestens 10 Min.It is also proposed according to the invention, the residence time in the to make the downstream scrubber sump so large that it can be used for at least 10 minutes.

als Minimum beträgt, um das Redoxpotential auf größer minus 100 Millivolt einzustellen.as a minimum, the redox potential to greater than minus 100 millivolts to adjust.

Claims (1)

Patentanspruch: Verfahren zum Betreiben eines Wäschers zur simultanen SO2 und NO##Abscheidung dadurch gekennzeichnet, daß der Wäscher als Gleichstrom- oder Gegenstromwäscher ausgebildet ist mit den Düsenebenen A, B, C, die zuerst dem Rohgasstrom entgegenstehen und mit einem pH-Wert vorzugsweise kleiner pH 4 beaufschlagt werden, und die nach z.B. drei weiteren Düsenebenen D, E, B dann kontaktierten Düsenebenen mit einem pH-Wert vorzugsweise größer pH 5 beaufschlagt werden, -und der Waschflüssigkeitssumpf so groß ausgebildet ist, daß die Verweilzeit der Waschflüssigkeit in diesem mehr als 10 Min. beträgt.Claim: Method for operating a washer for simultaneous SO2 and NO ## separation characterized in that the scrubber is a direct current or countercurrent washer is designed with the nozzle levels A, B, C, which are first the Oppose the raw gas flow and have a pH value preferably less than pH 4 and the nozzle planes contacted after e.g. three further nozzle planes D, E, B a pH value preferably greater than pH 5 can be applied, and the washing liquid sump is made so large that the residence time of the washing liquid in this longer than 10 minutes.
DE19843441339 1984-01-25 1984-11-13 Scrubber for simultaneous elimination of SO2 and NOx in a single-stage construction Withdrawn DE3441339A1 (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
DE19843441339 DE3441339A1 (en) 1984-11-13 1984-11-13 Scrubber for simultaneous elimination of SO2 and NOx in a single-stage construction
AU38857/85A AU569775B2 (en) 1984-01-25 1985-01-23 Stripping nox and sox from flue gases discharged from combustion plants
EP85900664A EP0168453A1 (en) 1984-01-25 1985-01-23 Process for stripping nitrogen oxides and sulphur oxides as well as optionally other noxious elements of flue gas from combustion plants
US06/781,235 US4670234A (en) 1984-01-25 1985-01-23 Process for stripping nitrogen oxides and sulphur oxides as well as optionally other noxious elements of flue gas from combustion plants
PCT/EP1985/000018 WO1985003238A2 (en) 1984-01-25 1985-01-23 Process for stripping nitrogen oxides and sulphur oxides as well as optionally other noxious elements of flue gas from combustion plants
IT19231/85A IT1199650B (en) 1984-01-25 1985-01-25 PROCEDURE FOR THE SEPARATION OF NITROGEN OXIDES AND SULFUR OXIDS AND EVENTUALLY OF OTHER HARMFUL SUBSTANCES FROM THE COMBUSTION GASES OF COMBUSTION PLANTS
DD85272832A DD233949A5 (en) 1984-03-15 1985-01-29 METHOD FOR THE SEPARATION OF NITROGEN OXIDES AND SULFUR OXIDES AND, WHERE APPROPRIATE, OTHER CONTAMINANTS FROM THE FLUE GASES OF COMBUSTION FACILITIES

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19843441339 DE3441339A1 (en) 1984-11-13 1984-11-13 Scrubber for simultaneous elimination of SO2 and NOx in a single-stage construction

Publications (1)

Publication Number Publication Date
DE3441339A1 true DE3441339A1 (en) 1986-05-15

Family

ID=6250112

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19843441339 Withdrawn DE3441339A1 (en) 1984-01-25 1984-11-13 Scrubber for simultaneous elimination of SO2 and NOx in a single-stage construction

Country Status (1)

Country Link
DE (1) DE3441339A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3715263A1 (en) * 1987-05-08 1988-11-17 Zabel Kg Kunststoffverarbeitun Process and apparatus for purifying exhaust air

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2249874A1 (en) * 1972-10-11 1974-04-25 Mitsubishi Heavy Ind Ltd Wet process for flue gas desulphurisation - by two stage absorption with recirculation of lime suspension giving efficient absorption and low lime loss
DE2905778A1 (en) * 1978-03-21 1979-09-27 Combustion Eng WASHING SYSTEM FOR GASES
DE2917720A1 (en) * 1978-05-04 1979-11-08 Combustion Eng Exhaust gas scrubber with good dust removal - having initial alkaline spray to remove acidic impurities followed by scrubber tray onto which diluent liquid is fed to remove dust

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2249874A1 (en) * 1972-10-11 1974-04-25 Mitsubishi Heavy Ind Ltd Wet process for flue gas desulphurisation - by two stage absorption with recirculation of lime suspension giving efficient absorption and low lime loss
DE2905778A1 (en) * 1978-03-21 1979-09-27 Combustion Eng WASHING SYSTEM FOR GASES
DE2917720A1 (en) * 1978-05-04 1979-11-08 Combustion Eng Exhaust gas scrubber with good dust removal - having initial alkaline spray to remove acidic impurities followed by scrubber tray onto which diluent liquid is fed to remove dust

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3715263A1 (en) * 1987-05-08 1988-11-17 Zabel Kg Kunststoffverarbeitun Process and apparatus for purifying exhaust air

Similar Documents

Publication Publication Date Title
DE2619145C3 (en) Process for separating nitrogen oxides or nitrogen oxides and sulfur oxides from exhaust gases
DE69511878T2 (en) METHOD FOR THE WET DESULFURATION OF SMOKE GASES WITH LIMESTONE
DE3236905A1 (en) PLANT FOR THE DESULFURATION OF SMOKE GASES AND METHOD FOR OPERATING THE PLANT
DE2363793C3 (en) Process for removing sulphurous gases from exhaust gases
DE2432903A1 (en) PROCESS FOR SEPARATING SULFUR OXYDES AND NITROGEN OXYDES FROM COMBUSTION GASES
DE69201915T2 (en) Exhaust gas desulfurization process.
DE3441339A1 (en) Scrubber for simultaneous elimination of SO2 and NOx in a single-stage construction
DE2943468C2 (en)
DE2415693B2 (en) Process for cleaning flue gases or other gases
DE3816532C1 (en) Process for purifying flue gas
DE3732191C1 (en) Method for treating the heat exchanger impinged with an ammonium sulphate-containing gas on washing
DE3507690A1 (en) Process for purifying nitrogen oxide (NO)-containing flue gases
DE3139991C2 (en)
DE3507718C2 (en)
DE19610444C1 (en) Removing gaseous elemental mercury@ from crude gas
DE3614789C2 (en)
DE2825816C3 (en) Process and device for reducing the chloride content of magnesium bisulfite from lye combustion exhaust gases
DE2634173C3 (en) Process for the separation of alkylamides from gases
DE3419068C2 (en)
DE3535172A1 (en) Process for regenerating carbon-containing adsorbents (adsorption agents)
DE2800994C2 (en) Process for shortening the oxidation of CaSO&amp;darr;3&amp;darr; sludge resulting from the SO&amp;darr;2&amp;darr; washing process
DE3910130C2 (en)
DE3445203A1 (en) Simultaneous separating out of SO2 and NOx in a single-stage scrubber
DE2530538C2 (en) Method and apparatus for purifying gases containing SO? 2?, Fluorine, NO? X?, N, CO? 2? and O? 2? are enriched
DE2801279A1 (en) Sulphur di:oxide removal from waste gas by wet scrubbing - using spent wash liquor contg. sulphite for softening regenerated soln. to reduce scale formation

Legal Events

Date Code Title Description
OM8 Search report available as to paragraph 43 lit. 1 sentence 1 patent law
8139 Disposal/non-payment of the annual fee