Our company has been involved in the greening of boilers for a long time. This greening is mainly focused on the following areas:
DeNOx (reduction of emissions of nitrogen oxides)
DeSOx (reduction of sulphur oxide emissions)
DeCO (reducingcarbon monoxide emissions)
DeTZL (reducing emissions of solid pollutants)
Our system works on the well-known principle of reaction of NH2- with NOx ions to form molecular nitrogen N2 and water H2O in a temperature field
of 1,000 – 1,100°C. This is the so-called selective non-catalytic reduction, abbreviated to SNCR.
This technology is designed to achieve the emission limit during operation at the least possible consumption of the reactive agent. Our system is primarily designed for boilers without continuous measurement of flue gas quality.
In our system used reagent, is an over-the-counter chemical preparation known as The Trade Name AdBlue®.
SNCR method efficiency (40 – 60%) is strongly influenced by the flue gas temperature or the correct positioning of the reagent nozzles in the combustion chamber in the specified temperature window, which is absolutely crucial for the whole denitrification method. Therefore, the location of the nozzles for each boiler is the subject of a design, supported by a model of the heat field of the boiler.
The subject of the proposal is also the dosed amount of reagent, which is dependent on the quality and quantity of flue gas.
In general, the SNCR equipment supplied by us consists of a reagent tank, a transport device, an injection system and an appropriately designed MaR for a given boiler tied to the Autoflame system (combustion process control optimization system).
When assessing the most appropriate solution, we evaluate, of course, and subsequently we also introduce primary measures leading to a reduction in NOx.
Our approach in this issue is based on the simplest method of desulphurisation, which is based on the addition of additives to fuels. From the point of view of EIA, it is most advantageous for the operator to use ground limestone as an additive, which is classified as a mineral. The amount of ground limestone added varies depending on the quality of the fuel incinerated (sulphur content) and whether the boiler is equipped with recirculation of dust or not. This recirculation significantly intensifies this process. If recirculation of dust spills is carried out using flue gas, a reduction of CO content is also achieved.
Ground limestone or lime hydrate is transported by tank trucks from which it is "bottled"“ into the reservoir silo (40 m3). From the silo is this additive is controlledly dosed into coal, which is then transported to the boilers.
As mentioned above, the CO content reduction can be done by installing flue gas recirculation. Another option is the installation of a suitably selected lining (secondary firing wall)which will guarantee more effective burn-out of excess CO.
In this area we cooperate with renowned companies that have been dealing with this issue for a long time. In cooperation with these companies, we will offer you the best solution for your specific application.