Ing. drd. Daniel DULCEA, Prof. dr. ing. Ioana IONEL, Ing. Nistor BUJDEI, Ing. Dumitru GARDAN
Rezumat
In aceasta lucrare vom prezenta necesitatea implementarii unei astfel de instalatii de denoxare la
CET Sud Timisoara. Modul de denoxare ales este SNCR (Selective NonCatalytic Reduction) reducere necatalictica
selectiva. Vom prezenta cateva argumente ce au dus la alegerea acestei solutii in detrimentul SCR (Selective
Catalyctic Reduction). De-asemenea vom face o scurta descriere a componentei unei astfel de instalatii cat si
modul de functionare. Intr-o astfel de instalatie este foarte importanta stabilirea zonei de injectie a agentului
reducator, domeniul optim de temperatura al acestei zone este cuprins intre 870°C si 1080°C. Peste acest
interval amoniacul este oxidat si in acest fel se produce mai mult oxid de azot, iar sub, rata de conversie este
prea scazuta si se elimina amoniac in atmosfera. Astfel un generator de abur echipat cu SNCR trebuie sa aiba
mai multe zone de injectie, indiferent de incarcare, reactia sa aiba loc.
Cuvinte cheie: Selective NonCatalytic ReductionSelective Catalyctic Reductiondenoxareureecazane de abur
Abstract
In this paper there will be presented the necessity of implementing the flue gas cleaning facility
inside CET SUD Timi?oara. The chosen cleaning technology in SNCR (Selective NonCatalytic Reduction). There will
be presented some arguments which led to chosing this solution instead of the SCR solution (Selective Catalyctic
Reduction). Also there will be presented in short the components of this type of installation and the working
principle. In this type of installation it is very important to determine the reduction agent injection area, the
optimum field of temperature of this area being between 870°C and 1080°C. Over this range, the ammonia is
oxidized and in this way more nitrogen oxide is produced, while under this range the conversion rate is too low
and ammonia is sent into the atmosphere. In this way a steam generator which is equipped with the SNCR
system has to have more injection areas, independent of the load for the reaction to take place
Keywords: Selective NonCatalytic ReductionSelective Catalyctic Reductionflue gas cleaningureateam boilers
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