Experimental verification of the efficiency of selective non-catalytic reduction in a bubbling fluidized bed combustor

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21220%2F22%3A00362235" target="_blank" >RIV/68407700:21220/22:00362235 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.14311/AP.2022.62.0361" target="_blank" >https://doi.org/10.14311/AP.2022.62.0361</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.14311/AP.2022.62.0361" target="_blank" >10.14311/AP.2022.62.0361</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Experimental verification of the efficiency of selective non-catalytic reduction in a bubbling fluidized bed combustor

Popis výsledku v původním jazyce

Controlling nitrogen oxide (NOx) emissions is still a challenge as increasingly stringent emission limits are introduced. Strict regulations will lead to the need to introduce secondary measures even for boilers with bubbling fluidized bed (BFB), which are generally characterized by low NOx emissions. Selective non-catalytic reduction has lower investment costs compared to other secondary measures for NOx reduction, but the temperatures for its efficient utilization are difficult to achieve in BFBs. This paper studies the possibility of an effective application of selective non-catalytic reduction (SNCR) of nitrogen oxides in a pilot-scale facility with a bubbling fluidized bed. The effect of temperatures between 880 and 950 degrees C in the reagent injection zone on NOx reduction was investigated. For the selected temperature, the effect of the amount of injected reagent, urea solution with concentration 32.5 % wt., was studied. The experiments were carried out using 500 kW(th) pilot scale BFB unit combusting lignite. In addition, an experiment was performed with the combustion of wooden pellets. With reagent injection, all experiments led to the reduction of nitrogen oxides and the highest NOx reduction of 58 % was achieved.

Název v anglickém jazyce

Experimental verification of the efficiency of selective non-catalytic reduction in a bubbling fluidized bed combustor

Popis výsledku anglicky

Controlling nitrogen oxide (NOx) emissions is still a challenge as increasingly stringent emission limits are introduced. Strict regulations will lead to the need to introduce secondary measures even for boilers with bubbling fluidized bed (BFB), which are generally characterized by low NOx emissions. Selective non-catalytic reduction has lower investment costs compared to other secondary measures for NOx reduction, but the temperatures for its efficient utilization are difficult to achieve in BFBs. This paper studies the possibility of an effective application of selective non-catalytic reduction (SNCR) of nitrogen oxides in a pilot-scale facility with a bubbling fluidized bed. The effect of temperatures between 880 and 950 degrees C in the reagent injection zone on NOx reduction was investigated. For the selected temperature, the effect of the amount of injected reagent, urea solution with concentration 32.5 % wt., was studied. The experiments were carried out using 500 kW(th) pilot scale BFB unit combusting lignite. In addition, an experiment was performed with the combustion of wooden pellets. With reagent injection, all experiments led to the reduction of nitrogen oxides and the highest NOx reduction of 58 % was achieved.

Druh

J_SC - Článek v periodiku v databázi SCOPUS

CEP obor

—

OECD FORD obor

20704 - Energy and fuels

Projekt

<a href="/cs/project/EF16_019%2F0000753" target="_blank" >EF16_019/0000753: Centrum výzkumu nízkouhlíkových energetických technologií</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2022

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Acta Polytechnica

ISSN

1210-2709

e-ISSN

1805-2363

Svazek periodika

62

Číslo periodika v rámci svazku

3

Stát vydavatele periodika

CZ - Česká republika

Počet stran výsledku

9

Strana od-do

361-369

Kód UT WoS článku

000828107300004

EID výsledku v databázi Scopus

2-s2.0-85134351256