LignoEnergy & LignoFluid

LignoEnergy Technology

The major components of a LignoEnergy plant are shown on the diagram on the left:

The heat transfer takes place in the furnace (1) where the heat transfer fluid (3) is heated. The hot flue gases, mixed with air (2) are sent to the dryer.

If process heat, for example, by the press is not required, then the heat is used by the combustion air (4), the dryer mixing air (5) or the auxiliary cooling (6).

The furnace of a LignoEnergy plant consists of air tight welded finned tube walls (boiler membrane walls). These provide a gas tight combustion chamber as well as the heat transfer surface for the heating of thermal fluid, hot water or steam. This is a technology well proven for many decades in large utility power plants.

Advantages of such a design in comparison to refractory lined furnaces are:

• More economic, light construction
• Lower excess air and higher efficiency are possible
• By absorbing radiant heat, a furnace of equal size has higher capacity and thermal NOx generation is reduced
• Heat transfer surfaces are integrated and no extra boiler is necessary
• The furnace can be prefabricated in the workshop
• The furnace is maintenance free