The invention relates to a tubular boiler with a heat exchange tube with at least one helical layer situated in a heat exchange chamber, and which includes a set of laterally joined spirals. The boiler includes, an inner side of the helical layer, an oven that is rigidly joined to said layer and connected to a feeder by means of which fuel is supplied. The boiler also includes an output collector for collecting ash and slag, which connects the inside of the heat exchange chamber to the outside of the boiler, and a forced-air-current generator that generates a movement of air inside the boiler and directs it to the oven. This movement of air moves the ash and slag along the at least one helical layer to the output collector.

Boiler equipment includes: a combustion device including a combustion chamber to combust fuel supplied to the combustion device; a combustion furnace including a combustion chamber formed inside thereof; and a heat exchanger transferring thermal energy obtained by combustion of the fuel in the combustion device to water. The combustion device is directly connected to a wall part of the combustion furnace such that the combustion chamber of the combustion device faces the combustion chamber of the combustion furnace. The fuel is efficiently combusted in the combustion chambers of the combustion device and the combustion furnace, which are integrated with each other. Thus, almost no ash is generated.

A device for plasma treatment of solid waste includes: a casing defining a treatment volume; a plasma torch including a first electrode and a second electrode that face into the treatment volume; an inlet port for intake of solid waste to be treated; an outlet port for disposal of inert solid products of reaction; a supply port for intake of a gas for supplying the aforesaid plasma torch; and a discharge port for discharge of gaseous products of reaction. The first electrode and the second electrode are arranged opposed to one another, and the casing is mounted rotatable about an axis of rotation. A treatment system is also provided incorporating the treatment device.

The invention relates to a cooling system (3) for rotary furnaces (1), and also to a method for operating such a cooling system (3). The cooling system (3) comprises for this purpose an arrangement of one or more cooling modules (31, 31, 31), which are arranged in the portion (21) to be cooled of the furnace shell (2), at least along the axis of rotation (R) of the furnace shell (2), wherein each cooling module (31) comprises an activatable switching valve (311) and a fan nozzle (312) for issuing a pulsed fan-shaped cooling liquid jet (4) and, when there are a number of cooling modules, the neighbouring cooling modules (31, 31, 31) are arranged in relation to one another at a distance (A1) parallel to the axis of rotation (R) of the furnace shell (2). Each cooling module (31, 31, 31) comprises at least one first heat sensor (313), connected to a cooling system control (32), for measuring a first local temperature (T1) of the furnace shell (2) ahead of the area of impingement (41) as seen in the direction of rotation (DR) of the furnace shell (2).

Boiler equipment includes: a combustion device including a combustion chamber to combust fuel supplied to the combustion device; a combustion furnace including a combustion chamber formed inside thereof; and a heat exchanger transferring thermal energy obtained by combustion of the fuel in the combustion device to water. The combustion device is directly connected to a wall part of the combustion furnace such that the combustion chamber of the combustion device faces the combustion chamber of the combustion furnace. The fuel is efficiently combusted in the combustion chambers of the combustion device and the combustion furnace, which are integrated with each other. Thus, almost no ash is generated.

The invention relates to a cooling system (3) for rotary furnaces (1), and also to a method for operating such a cooling system (3). The cooling system (3) comprises for this purpose an arrangement of one or more cooling modules (31, 31, 31), which are arranged in the portion (21) to be cooled of the furnace shell (2), at least along the axis of rotation (R) of the furnace shell (2), wherein each cooling module (31) comprises an activatable switching valve (311) and a fan nozzle (312) for issuing a pulsed fan-shaped cooling liquid jet (4) and, when there are a number of cooling modules, the neighbouring cooling modules (31, 31, 31) are arranged in relation to one another at a distance (A1) parallel to the axis of rotation (R) of the furnace shell (2). Each cooling module (31, 31, 31) comprises at least one first heat sensor (313), connected to a cooling system control (32), for measuring a first local temperature (T1) of the furnace shell (2) ahead of the area of impingement (41) as seen in the direction of rotation (DR) of the furnace shell (2).