Abstract: A device for storing and releasing heat energy for an electrical power production plant is described. The device has: at least one bed of fluidisable particles, arranged at least partly at receiving surfaces for such radiation; means for feeding a fluidisation gas for the fluidisation of said particles; and heat exchange elements flown through, in use, by an operating fluid and arranged at or in proximity of said bed of fluidisable particles.

Abstract: A device for storage and conveyance of thermal energy for an energy production system apt to receive solar radiation and based on the use of a modular fluidizable granular bed and a heat exchanger associated thereto is described.

Abstract: The present invention is about a conveyor plant for pyrites, other foreign materials like metal parts and occasionally ground solid fossil fuel, coming from the grinding mills of the solid fossil fuel, substantially comprising an open or enclosed metal container (1) inside which a metal conveyor belt (6) is disposed. The conveyor receives the material to be conveyed from the pyrites storage tanks (2) of each mill, through interception valves (3) and vibrating feeders (4) or directly from gravity discharge channels. Any spontaneous ignition of the conveyed material is controlled by a putting out system with water nozzles (17) or inert gas or steam admission nozzles (18) according to the plant configurations. The pyrites and the ground solid fossil fuel are collected in a stockage silo (16), it too provided with an inert gas or steam putting out system. For the storage tanks (2) a gas or steam inertization system is provided as well.

Abstract: The present invention discloses an automatic plant and a method of stockage in a covered yard of petcoke fuel with high humidity-contents, natural dehumidification up to set humidity values and subsequent reuptake for conveyance to the silos feeding a thermal unit.

Abstract: A transport apparatus for dry extraction and transport of fly ashes produced inside solid fuel boilers, adapted to be associated with a fume dedusting system and including: a metal belt conveyor, having a plurality of slats partially overlapped, adapted to support a bed of fly ashes to transport the bed along a preset path, and a sealed metal casing inside which the slats move; and containment means for fly ashes, adapted to confine the ashes on the slats and along the transport path so as to limit relative motion between ashes and conveyor, which means comprises transverse boards, leveling members, side boards and a movable rear baffle.

Abstract: The present invention is about a process for treating all the ashes produced by a coal dust boiler (1), able to reduce the total unburnt matter content, to increase the combustion efficiency of the boiler (1), and to have the light ashes as the only waste arising from the coal combustion. In particular, said process provides for the extraction of the heavy ashes (4) from the boiler bottom (23), the ashes coming from the hoppers of the economizers (5) and the fraction of light ash richer of unburnt matter coming from the filters (11) used to collect the dust from the flue gas; said ashes are mixed in a silo (15), proportioned and transferred in one or more feeders (17) of the coal mills (18), and reintroduced in the boiler (1) after being mixed with the coal through the burners (2).

Abstract: The present invention relates to a system for extracting and recovering energy for large for large flows of heavy ashes produced by solid fuel boilers, able to decrease the final temperature of the extracted ash without increasing the air flow entering the boiler flue, usually fixed by the boiler designers at a value around 1.5% of the total combustion air. When the air flow needed to the cooling exceeds the maximum quantity allowable in the boiler, the system allows the air and the possible vapour to be sent to the air inletting duct entering the air/fume exchanger on the air side, thanks to a separation of the cooling environments made by the ash itself. The separation of the environments of the cooling system is handled automatically based upon a temperature signal of the ash to the discharge from the system. If the cooling air is not sufficient to cool down the ash, the cooling efficiency can be increased by the addition of nebulised water.

Abstract: Device for recovering fines constituted by a dragging conveyor/loop elevator equipped with scrapers/collecting cups (4) moved by a catenary link according to a closed path and associated to a plate conveyor supported by chains or metallic belt, which conveyor is equipped with pendula/pushers hinged to the transport plates themselves.

Abstract: A conveyor belt (1) includes a metallic net belt (8) functionally driven by at least a traction drum (5), tensioned by at least a return drum (12) and supported by a plurality of independent transversal rollers (13). Belt (1) supports individually a plurality of plates (2) partially overlapping one another, so as to form a flat continuous transport surface as a mobile reliable plane that is resistant to extreme mechanical stress. Each of said plates (2) is suitably shaped so that an upper portion of one plate overlaps a lower portion of the following plate.

Abstract: The present invention relates to an extraction and air/water cooling system and energy recovery for large flows of heavy ashes, produced by solid fuel boilers (100), able to reduce final temperature of the extracted ash, without increasing the air flow entering the throat of the boiler. When the air flow needed for cooling process exceeds the maximum flow admissible in the boiler, the system allows to the exceeding air and to the possible steam to be sent to the fume duct in the most appropriate point, thanks to a separation of the cooling environment made by the ash itself. The separation of the environments of the cooling system is handled automatically based upon a temperature signal of the ash at the system exhaust. If the cooling air is not sufficient to cool the ash, the cooling efficiency can be increased by adding atomized water.

Abstract: The present invention relates to a system for dry extracting and cooling incinerator clinkers, mainly comprising an extraction-cooling unit and means for separating the environment of the combustion chamber from that of said unit. The system is able to reduce the final temperature of the extracted clinkers, without exceeding the air quantity that can be admitted at the entrance to the combustion chamber of the incinerator (FIG. 1). When the air flow needed for cooling process exceeds said quantity that can be admitted, the system allows exceeding air to be sent in the most appropriate point of the boiler downstream of the combustion chamber, by suitable control means.

Abstract: The present invention relates to a system for dry extracting/cooling heavy ashes and for controlling the combustion of high unburnt content residues, allowing to: extract heavy ash from the boiler bottom (12), foster and adjust post-combustion on the extractor belt (14) by combined use of comburent hot air and inert combustion fumes, already available in boiler, cool the ashes present on the belt and optionally re-circulating them—all or in part—in boiler, along with the fraction of light ashes of higher unburnt content.

Abstract: The present invention discloses an automatic plant and a method of stockage in a covered yard of petcoke fuel with high humidity-contents, natural dehumidification up to set humidity values and subsequent reuptake for conveyance to the silos feeding a thermal unit.

Abstract: The present invention relates to an additional cooling system (1) for the dry extraction of large flow of heavy ashes produced by boilers (100) with solid fuel apt to decrease the temperature of the ashes. The system comprises an extractor with metallic belt (2) gathering the ash which deposits onto the bottom of the boiler (100), a crushing system (3), having the purpose of increasing the thermal exchange surface of the material, one or more metallic conveyors (4, 6) having the cooling function by introducing countercurrent air-flow running through transported ashes, an in-line cooling device (5) having the function of putting into contact the ash several times with additional countercurrent air in order to increase the possible exchange without necessarily increasing the air-flow entering the combustion chamber. Such additional air can be sent preferably upstream of the air heater or in atmosphere upon fines' captation.

Abstract: The present invention relates to a cooling system for dry extraction of heavy bottom ash output from furnaces for solid fuel during storing step at hopper, characterized by suitable air intakes (2), placed on the sidewalls of the hopper (1) at the hopper bottom, through which a controlled amount of cooling air passes sucked up in the combustion chamber (12) by the depression value therein, capable to achieve an uniform and balanced distribution system for such air during storing step at hopper (1) which optimizes the cooling of the falling ash, leaving the total amount of the air entering the furnace unchanged. The distribution header of the intakes (2) is connected to the extractor environment (6) by the lid (7) through a suitable conduit (3) provided with automated valve (8) being open during the storing step allowing the cooling air through to pass said intakes (2) placed on the sidewalls of the hopper (1).

Abstract: The present invention provides a conveyor belt (1), comprising a metallic net belt (8) functionally driven by at least a traction drum (5), tensioned by at least a return drum (12) and supported by a plurality of independent transversal rollers (13). Belt (1) supports individually a plurality of plates (2) partially overlapping one another, so as to form a flat continuous transport surface as a mobile reliable plane that is resistant to extreme mechanical stress. Each of said plates (2) is suitably shaped so that an upper portion of one plate overlaps a lower portion of the following plate.

Abstract: The present invention relates to a milling and water-air combined cooling system for bottom ash from heating furnaces for solid fuels, able to maximize the efficiency in milling and cooling also large ash lumps at high temperature and in improving cooling air fluid dynamics which passes said system in counter-flow. The system comprises a crusher (1) provided with a pre-crusher integral with the crusher's (1) port, a water cooling system (3-4), and a separation (5-6) of the flow of the fine material entering the crusher (1) from the lump sized ash. The pre-milling device (2) allows a partial milling of the large lumps and it is actuated by laser or equivalent sensors (7) which detect the presence of ash agglomerates in the milling area. The cooling water passes preferably throughout the shaft (8) of the toothed rotor (9) and/or throughout the fixed slab (10) and moves therefrom, through suitable ducts (4) and nozzles (3), to the milling area.

Abstract: A system for the extraction, drainage and wet transport of the petroleum coke produced by the coking chambers is described. Such system provides the collection, drainage and transport of the petroleum coke coming from the coking chambers during the cutting phase all the way to the boilers' feeding. The material extracted from the coking chamber (7) through the use of high pressure water is conveyed on the pre-crusher (4) through a connection system (1a). Between the pre-crusher (4) and the draining belt conveyor (2) there is a drainage and containment hopper (1) which has the dual function of accumulation and possible drainage thanks to some holes that serve as weir. The material which falls from above in different sizes, after having being reduced in size by the pre-crusher (4), gets transported by the belt (2) that carries out a first drainage phase through the holes made on the same belt. The coke is collected on the belt while the drained water is collected in a lower collection channel (8).

Abstract: The present invention is about a process for treating all the ashes produced by a coal dust boiler (1), able to reduce the total unburnt matter content, to increase the combustion efficiency of the boiler (1), and to have the light ashes as the only waste arising from the coal combustion. In particular, said process provides for the extraction of the heavy ashes (4) from the boiler bottom (23), the ashes coming from the hoppers of the economizers (5) and the fraction of light ash richer of unburnt matter coming from the filters (11) used to collect the dust from the flue gas; said ashes are mixed in a silo (15), proportioned and transferred in one or more feeders (17) of the coal mills (18), and reintroduced in the boiler (1) after being mixed with the coal through the burners (2).

Abstract: The present invention is about a conveyor plant for pyrites, other foreign materials like metal parts and occasionally ground solid fossil fuel, coming from the grinding mills of the solid fossil fuel, substantially comprising an open or enclosed metal container (1) inside which a metal conveyor belt (6) is disposed. The conveyor receives the material to be conveyed from the pyrites storage tanks (2) of each mill, through interception valves (3) and vibrating feeders (4) or directly from gravity discharge channels. Any spontaneous ignition of the conveyed material is controlled by a putting out system with water nozzles (17) or inert gas or steam admission nozzles (18) according to the plant configurations. The pyrites and the ground solid fossil fuel are collected in a stockage silo (16), it too provided with an inert gas or steam putting out system. For the storage tanks (2) a gas or steam inertization system is provided as well.