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Combustion chamber

Features of the combustion chamber:

1) Loading of raw material across the whole width of the combustion chamber,
2) Big-volume combustion chamber,
3) Turbochallenger – with a vertical post-combustion chamber,
4) Slow, but independent movement of moving moving grate,
5) Divided air supply of the moving grate zone,
6) Combustion air preheating and recirculation,
7) Precise moving grate parts,
8) Long and slow flame,
9) Fully controlled and visualized combustion process.

In case of hot or superheated water production, using wet fuel, there is used the AVR type combustion chamber that consists of the big-volume basic combustion chamber with the subordinated post-combustion chamber, where flue gas changes its movement direction and speed, thus ensuring combustion of flying particles as well as depositing of unburned particles on the place provided for the ash.


Combustion chamber lining consists of various types of insulation and heat-resistant brick lining, which ensures the combustion chamber temperature resistance and temperature radiation to incoming fresh, wet material, thus drying it.

Due to different temperatures in the whole combustion chamber, materials used for the brick lining in each combustion chamber area differ too, as only this can ensure the proper temperature distribution as well as prevent overheating of the combustion chamber in any of the areas.

In the combustion chamber and post-combustion chamber, temperature is regulated in various places in order to prevent melting of the ash, overheating of the combustion chamber as well as to provide optimum temperature for ensuring combustion process.

The secondary air is supplied to the combustion chamber for ensuring complete combustion, which operation is controlled based on the oxygen content in the flue gas.


An integrated flue gas recirculation system ensures post-combustion chamber temperature regulation.

Sensors that are placed in various areas of the combustion chamber are duplicated, thus ensuring error-free measurement and respective control.

Outer insulation of the combustion chamber is designed in such way that air, which is located between the metal casing and the external cladding, can be used as secondary air, thus also achieving the secondary air preheating and significantly reducing the internal temperature of the boiler room, which may be caused by the heat volume radiated by the boiler unit.

 

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