PL434363A1 - Method and system for removing nitrogen oxides, metallic mercury and sulfur dioxide from boiler flue gases - Google Patents

Method and system for removing nitrogen oxides, metallic mercury and sulfur dioxide from boiler flue gases

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Publication number
PL434363A1
PL434363A1 PL434363A PL43436320A PL434363A1 PL 434363 A1 PL434363 A1 PL 434363A1 PL 434363 A PL434363 A PL 434363A PL 43436320 A PL43436320 A PL 43436320A PL 434363 A1 PL434363 A1 PL 434363A1
Authority
PL
Poland
Prior art keywords
flue gas
sulfur dioxide
nitrogen oxides
metallic mercury
removing nitrogen
Prior art date
Application number
PL434363A
Other languages
Polish (pl)
Inventor
Włodzimierz Kordylewski
Dariusz Łuszkiewicz
Maria Jędrusik
Arkadiusz Świerczok
Original Assignee
Politechnika Wrocławska
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 Politechnika Wrocławska filed Critical Politechnika Wrocławska
Priority to PL434363A priority Critical patent/PL434363A1/en
Publication of PL434363A1 publication Critical patent/PL434363A1/en

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Classifications

    • 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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  • Treating Waste Gases (AREA)

Abstract

Przedmiotem wynalazku jest sposób i układ do usuwania tlenków azotu (NOx), rtęci metalicznej (Hg0) i dwutlenku siarki (SO2) ze spalin kotłowych. Sposób usuwania tlenków azotu (NOx), rtęci metalicznej (Hg0) i dwutlenku siarki (SO2) ze spalin z separacją produktów odazotowania i odsiarczania znamienny jest tym, że tlenek azotu i rtęć metaliczna są utleniane w kanale spalin ozonem, a powstały pentatlenek diazotu w reakcji z parą wodną tworzy kwas azotowy, który jest usuwany ze spalin w komorze utleniającej w wyniku absorpcji HNO3 na powierzchni zwilżonego wypełnienia. Powstający w komorze kwas azotowy krąży w obiegu zamkniętym i finalnie może zostać wykorzystany np. tworząc nawóz azotowy. Pozostające za reaktorem w spalinach tlenki azotu (w tym NO2) są absorbowane wraz z ditlenkiem siarki i rtęcią utlenioną w instalacji mokrego odsiarczania spalin. Obecność NO2 i ozonu w spalinach wspomaga proces utleniania CaSO3 do CaSO4 w zbiorniku pod absorberem.The present invention relates to a method and system for removing nitrogen oxides (NOx), metallic mercury (Hg0) and sulfur dioxide (SO2) from boiler flue gas. The method of removing nitrogen oxides (NOx), metallic mercury (Hg0) and sulfur dioxide (SO2) from flue gas with the separation of denitrification and desulphurization products is characterized by the fact that nitrogen oxide and metallic mercury are oxidized in the flue gas channel with ozone, and the resulting nitrogen pentoxide in the reaction with water vapor, it forms nitric acid, which is removed from the flue gas in the oxidation chamber as a result of the absorption of HNO3 on the surface of the wetted packing. The nitric acid formed in the chamber circulates in a closed circuit and can finally be used, e.g. by creating nitrogen fertilizer. Nitrogen oxides remaining behind the reactor in the flue gas (including NO2) are absorbed together with sulfur dioxide and oxidized mercury in the wet flue gas desulphurization installation. The presence of NO2 and ozone in the exhaust gas supports the oxidation of CaSO3 to CaSO4 in the tank under the absorber.

PL434363A 2020-06-18 2020-06-18 Method and system for removing nitrogen oxides, metallic mercury and sulfur dioxide from boiler flue gases PL434363A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL434363A PL434363A1 (en) 2020-06-18 2020-06-18 Method and system for removing nitrogen oxides, metallic mercury and sulfur dioxide from boiler flue gases

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PL434363A PL434363A1 (en) 2020-06-18 2020-06-18 Method and system for removing nitrogen oxides, metallic mercury and sulfur dioxide from boiler flue gases

Publications (1)

Publication Number Publication Date
PL434363A1 true PL434363A1 (en) 2021-12-20

Family

ID=80001799

Family Applications (1)

Application Number Title Priority Date Filing Date
PL434363A PL434363A1 (en) 2020-06-18 2020-06-18 Method and system for removing nitrogen oxides, metallic mercury and sulfur dioxide from boiler flue gases

Country Status (1)

Country Link
PL (1) PL434363A1 (en)

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