The company Wind Smile, which specializes in the construction and operation of CO2-neutral solar and wind power plants, has commissioned INTEC to plan and build a biomass-fired power plant with an output of 2 MWel.

The fuel, mainly forest wood chips, is transported from the fuel site to a hydraulically operated drawbar by a wheel loader. From here, the fuel passes through a sieve section into a trough chain conveyor and further into the fuel feed shaft, from which the fuel - depending on the power requirement - is fed to the combustion grate in a controlled manner. The fuel is completely burned on the air-cooled, hydraulically operated INTEC moving grate through targeted air guidance.

The moving grate, the core of the INTEC combustion technology, is mounted on low-wear rollers and is positively guided. The combustion air is continuously monitored and automatically regulated via built-in sensors. The grate bars are bundled together so that foreign substances in the fuel, such as nails and stones, cannot cause any problems.

The exhaust gases produced during combustion are used in a steam generator downstream of combustion to generate superheated steam. To further increase the thermal efficiency of the system to approx. 90%, the feed water is heated to saturated steam temperature in tube bundle heat exchangers and the combustion air is preheated. A ball rain system is used as a cleaning device for the tube bundle heat exchangers.

The feed water is conditioned for turbine operation using a tailored water treatment system. A 2-field dry electrostatic filter ensures the required exhaust gas purity.

A multi-stage condensation turbine generates electricity in a synchronous generator, which is fed into the Japanese local grid. The exhaust steam from the turbine is condensed via a water-cooled condenser and returned to the steam cycle.

A modern, fail-safe control system monitors and regulates the entire process fully automatically. All necessary process parameters are recorded and evaluated. Additional software tools allow remote access to the visualization and control of the system in order to support the customer remotely if any malfunctions occur.