Features and advantages
- Electrical switchgear with PLC and remote assistance
- Independent combustion system to guarantee correct operation of the plant
- Modulating combustion system to maintain the correct operating temperature with the different incoming pollutant loads
- Combustion chamber refractory interior with high density ceramic fibre insulation allowing the plant to last longer
- Specific design to be applied with pollutant concentrations up to 25% of LEL
- High purification efficiency (98-99.5%)
- High thermal efficiency (92-96%)
- Reduced production of secondary pollutants (CO, NOx)
- Possibility of further heat recovery
- Reduced maintenance
The polluted air is extracted by a fan which is designed to overcome the pressure drops of the system. An exhaust adjustment system (inverter) is installed when there is a variable flow rate so as to optimise energy consumption.
The plant generally consists of three towers containing ceramic material which cyclically accumulate and release heat, connected one to another at the top by a combustion chamber. The first tower which contains ceramic material is crossed by the cold air to be treated from the bottom upwards. It absorbs the heat accumulated by the ceramic during the previous cycle with the treated outgoing effluent. Purified hot air passes through the second tower, coming from the combustion chamber which it absorbs heat from.
The third tower is purged and cleaned from pollutant residues to prepare it for the effluent outflow in the next cycle. Purging is useful since this chamber previously contained the incoming polluted effluent.
A series of valves, specifically designed and tested for reliability and safety, alternate the inlet and outlet of the effluent into the reactors, thus achieving a cyclical process.
This thermal exchange system, obtained by using ceramic masses, allows close to 96% heat recovery, making the plant self-sufficient meaning zero auxiliary fuel consumption with an incoming concentration generally close to 2 grams.
The type of ceramic material used to accumulate heat is optimised to guarantee both reduced electric energy consumption and low auxiliary fuel consumption as well as minimise congestion due to the presence of particulate (organic or inorganic).