Currently, the wasteWOIMA® WtE power plant uses very conservative steam parameters (400oC / 40 barg) to ensure high availability, low maintenance costs and overall reduced risks related to fuel quality. These steam parameters are used independent of the fuel, i.e. even with “easy” fuels that pose less risks for heat corrosion. Several key factors affect the power plant’s power output, such as Steam quality

The grate firing system in the wasteWOIMA® WtE power plant is quite flexible and can accept a wide range of heterogenous solid waste fuels with LHV above 7 MJ/kg and moisture content below 55%. On top of this, a small amount (up to 10%) of low-calorific-value sludges can be added to the fuel mix and reduced to easily disposable bottom ash (slag) in the grate incineration process. Although the sludges contain very little energy, their small quantity does not affect th...

The waste fuel incineration process is one of the three key functions of any power plant besides the heat recovery boiler and flue gas treatment (FGT) system. Its purpose is to combust heterogeneous solid waste fuels flexibly to homogenous flue gas with good efficiency and with high tolerance for inert particles, such as metals, gravel and sand. Waste incineration is also a major source of income for the plant through tipping fees besides energy sales since w...

The heterogenous waste fuels, in particular MSW and industrial waste streams, used in waste-to-energy power plants often include valuable materials that can be recovered either prior to or after incineration. Metals, both ferrous and non-ferrous are one group that can quite easily be recovered after incineration from the bottom ash using complementing technologies such as sieving, crushing, as well as ballistic, magnetic and eddy current separation. The bottom ash material co...

Any power plant’s efficiency is affected by how much thermal energy is lost through radiation, convection and conduction. The closed cooling circuits of the wasteWOIMA® plant retain all the thermal energy transferred to it via waste incineration or cooling processes. Simultaneously, the closed circuit requires only minimal top up water and produces no wastewater There is significant amounts of thermal energy available in Co...

Every power plant requires electricity to operate. There are dozens of pumps, fans, valves, actuators and similar required in everyday operations. Combined these form the plant’s self-consumption a.k.a. parasitic load which is the difference between generated electricity (gross MW) and electricity available for sale (net MW). The standardized WOIMAdesign allows us to spend time in finding and selecting the most optimal equipment not only from a quality point of view but also f...

Typically, waste-to-energy power plants are designed for a 20-to-25-year lifespan. The heterogenous waste fuel cause more wear and tear than traditional fossil or biofuels. The wasteWOIMA® is designed for a 30-year lifespan in the harshest of conditions and with difficult waste fuels. This will enable the plant to continue generating revenue for 5 to 10 years longer, when other similar plants have already been decommissioned. To ensure the long li...

Typically, RFQs require 8,000h of annual plant availability. The wasteWOIMA® design is based on best available technologies (BAT) combined with optimized material and equipment selection to ensure at least 8,200h annual availability. Better plant availability is achieved through Longer MTBF Less maintenance breaks Shorter maintenance breaks Less unplanned stoppages ...

The wasteWOIMA® WtE power plant uses circulation gas and advanced automation with several measuring points and methods to ensure that the incineration on the grate takes place at exactly the optimal temperature. Combined with optimal combustion and post-combustion chamber design, controlled air feed, high-quality thermal insulation / cooling  and  refractory / Inconel protection  leads to extremely low losses on ignition (LOI), i.e. the unburnt carbon content in t...

The Waste Framework Directive (WFD) hierarchy prioritises waste prevention followed by preparing for reuse, recycling, recovery and finally, least favourably, disposal. WFD Article 3 makes the following definitions: Recovery means any operation the principal result of which is waste serving a useful purpose by replacing other materials Disposal means any operation which is not recovery A Municipal Solid Waste Inci...