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Home Services Design Equipment Sale and Assemblage Contractor's Services Heat and Boiler Plants Biomass Burning Technologies Heat Distribution, Water Supply and Wastewater Collection Networks Heat Substations Solar power systems Indoor Installations (District Heating, Cold and Hot Water, Wastewater) Water Treatment Stations Wastewater Treatment Plants Pumping plants and intermediate pumping stations Electrical systems, control and measurements systems and automation Equipment Servicing

Biomass Burning Technologies

Envirotech has a broad offer of biomass burning technologies both for investors planning to build new heating and boiler facilities and for those intending only to modernise the existing heating systems. Technologies suggested by our company are based on burning of wood fuels  shavings, sawdust, dust and other woodworking industry post production residues.Investors willing to build new boiler facilities are suggested by Envirotech to choose products of two companies: Thermax and VA Tech Elin EBG.

Thermax technology is entirely automatic and consists in conveying the biomass on a system of worms and feeders to the injection system, and then to the combustion chamber which is a water-tube boiler. While leaving the burning spot, the exhausts go through waste-heat boiler. The boiler is connected to an economiser of air-exhaust type which heats the original air indispensable for burning and conveys the heat to water on the basis of rules of convection. Application of the above mentioned economiser enhances efficiency of the system independently from parameters of produced water or steam. Great flexibility of the system with respect to the type and quality of the applied wood fuel is an indisputable advantage of Thermax technology.

Technologically advanced solutions of company VA Tech Elin EBG enable burning of wood shavings, bark, dusts (even consisting in 100 % of wood dust) and sawdust. A unique and characteristic trait of this technology is the possibility to mix wood fuel in any proportions. Burning of biomass takes place with the application of Awinator-type burner protected by patents, which is a special injector conveying broken-up fuel into the combustion chamber. A technologically advanced system based on OXY probe is used for burning control. High efficiency, flexibility with respect to boiler rating and unlimited proportion of dust in the fuel makes this technology applicable to almost every plant, even with a very diversified wood fuel.

Envirotech also undertakes to provide solutions appropriate for clients who only want to modernise the existing boiler and heating facilities (including boilers facilities based on water-tube boilers of WR-1,25, WR-2,5 and WR-5 types), adapting them to burning of wood fuels. Solution offered in this respect consists in the addition of an appropriate combustion chamber (Dutch oven) specially adapted to burning of biomass (option with a fluidised bed or in the form of cyclone chamber) and its connection to the existing boiler.

One of the characteristics of a fluidised Dutch oven is the possibility to burn many fuels. An additional advantage in the fact that traditional fine coal, brown coal and sewer plant waste may be burned in it apart from shavings, bark and wood dust. This technology is especially advisable in a situation where the investor intends to use hard coal as alternate fuel, since  owing to the possibility to bind sulphur directly in fluidised furnace by adding materials containing calcium  it enables observance of air protection standards, even in the case of coal sulphated to a large extent.
Cyclone chamber (furnace in which a process of centrifugal burning of fuel takes place) is an alternative solution with respect to burning of biomass on sloping, reciprocating fire grates. Complete burning of not only all kinds of wood waste: dusts, sawdust and chips but also broken-up paper waste is the fundamental advantage of application of this technology. Essential advantage of application of this option is also occurrence of the burning process with little excess air and ease of adaptation of the boiler burning fine coal on a travelling grate to burning of biomass.

Solutions applied by Envirotech with respect to modernisation of existing boilers are based on copyright technologies devised in teams led by prof. dr hab. Stanisław Kandefer from Technical University of Cracow (fluidised Dutch oven) and by dr Stanisław Kruczek from Technical University of Wrocław (cyclone chamber). Choice of a variant depends on a type and requirements of the installation, type of fuel and local conditions.