Grate firing with grinding dust combustion. Total firing capacity: 24 MW Chipboard production Thailand

Grate firing with grinding dust injection Total firing power: 60 MW MDF production Spain

Fluidized bed combustion Total firing power: 20 MW Tobacco factory Indonesia

Solid fuel combustion

Rising prices for fossil fuels and the ever-increasing demand for the use of renewable, CO2-neutral fuels require innovative solutions. INTEC plans, designs and delivers solid fuel-fired energy systems tailored to the customer, which supply the plant with process energy in an efficient and environmentally friendly manner and are used to generate electricity through a combined system with steam turbines or ORC modules in the thermal oil circuit. The flue gases produced during combustion are heated using our thermal oil or steam systems.

The INTEC solid fuel furnaces often use existing production waste such as coal, wood chips, wood waste, bark, grinding dust, rice husks and other biomass as fuel.

By minimizing the use of fossil fuels, INTEC systems help keep your operating costs to a minimum.

The main components of the energy center are the furnaces, which are tailored to the respective requirements and fuels:

Grate firing

Underfeed firing systems for outputs up to approx. 3 MW for lumpy wood waste from 10 – 100% absolutely dry (atro)
Moving grate furnaces of the VRCS series with an output of up to approx. 60 MW with humidity up to 180% absolutely dry (atro)
Firing with traveling grate for use with lignite or hard coal.
Screening and grinding dust can be injected over the grate or into the afterburning chamber and thus burned cost-effectively and with low emissions.

Fluidized bed combustion

Circulating fluidized bed combustion with ash cooler for outputs up to 50 MW for biomass, coal dust and sludge as fuels

Exhaust gas cleaning

For fuels with higher nitrogen content, secondary measures to reduce NOx emissions such as SNCR (selective non-catalytic reduction) can be used.

During selective non-catalytic reduction, an amine-containing or -forming reducing agent reacts with the harmful flue gas components nitrogen monoxide (NO) and nitrogen dioxide (NO2) in the temperature range from 900 °C to 1100 °C to form nitrogen (N2) and water (H2O).

Depending on the respective requirements, the process heat can be provided via thermal oil, steam, hot or warm water.
The performance range of the INTEC hot gas generators is adaptable. It ranges from 1,000 kW to approx. 90,000 kW.

References from the field of combustion systems