Abstract: An apparatus comprises a filtering device which includes a plurality of filtering elements made of a filter material. The apparatus further comprises a cleaning system for periodically cleaning the filtering device in order to remove contaminating particles from the filtering device. The cleaning system has at least one percussion element for applying percussions at least on an impact surface of an intermediate structure, so as to generate, for each percussion, an impact which is able to detach from the filter material a first fraction of the contaminating particles adhering to the filter material and then vibrate the filter material to detach from it further contaminants. The intermediate structure, which is interposed between the percussion element and the filter material, has an inner region delimited at least partly by the impact surface and an outer region which surrounds at least partly the inner region.

Abstract: A transport device for conveying a flowable material, comprises a screw conveyor for collecting the fluid from a collecting zone and transporting the fluid to a destination zone. The screw conveyor comprises a spiral which is wound around a shaft extending along a longitudinal axis and an outer casing which at least partly houses the spiral. The spiral has a plurality of turns. The outer casing has an inner surface facing respective head surfaces of at least some turns. Between two consecutive turns and the outer casing there is a compartment.

Abstract: The invention relates to a dust collector for gaseous fluids and to a method for manufacturing the dust collector. The dust collector includes one or more filtering assemblies (1) that have filtering elements (2). The filtering elements (2) have a tubular extension. They are kept in contact with each other along a direction parallel to their length; the filtering elements (2) enclose, between them, flow channels (3). The method for manufacturing a filtering assembly (1) of the dust collector includes the steps of: permanently deforming a sheet of a filtering material so as to obtain a corrugated sheet (8) with a cross-section defined by repetitions of ??-shaped forms that are connected to each other; and coupling two deformed sheets, so as to keep the straight parts of the ??-shaped forms in contact and to obtain rows of filtering elements (2).

Abstract: A vertical separator for the treatment of slurry includes a screen device with a vertical axis provided with a screen, a feeding device provided with a pump to feed the slurry to a screen device, a discharge device for the liquid part of the slurry, and a discharge device for the solid particles of the slurry. The screen device houses a counter-pressing device which is designed to generate a force which partially counters the pushing action exerted by the pump upon the slurry.

Abstract: A screw conveyor to convey powdery material, in particular cement. The screw conveyor comprises: a transfer screw; and a trough containing the transfer screw; the trough being provided with an inlet section and an outlet section of the powdery material. The screw conveyor is characterized in that the screw comprises: at least a first screw portion having a first law of continuous variation of the pitches of the screw, which can be graphically represented by means of a first function having in at least one stretch a first derivative other than zero; and at least a second screw portion having a second law of continuous variation of the pitches of the screw, which can be graphically represented by a second function having in at least one stretch a first derivative other than zero. The first law of continuous variation of the pitches is different from the second law of continuous variation of the pitches.

Abstract: The invention relates to a dust collector for gaseous fluids and to a method for manufacturing the dust collector. The dust collector, used for removing dust from gaseous fluids containing fine dust, is equipped with a periodic cleaning system and comprises one or more filtering assemblies (1) that have filtering elements (2). The filtering elements (2) have a tubular extension and are closed at one end. They are made of a rigid or semirigid filtering material and are kept in contact with each other along a direction parallel to their length; the filtering elements (2) enclose, between them, flow channels (3) open at one end and closed at the end opposite the end at which the filtering elements (2) are closed.

Abstract: A screw conveyor to convey powdery material, in particular cement. The screw conveyor comprises: a transfer screw; and a trough containing the transfer screw; the trough being provided with an inlet section and an outlet section of the powdery material. The screw conveyor is characterized in that the screw comprises: at least a first screw portion having a first law of continuous variation of the pitches of the screw, which can be graphically represented by means of a first function having in at least one stretch a first derivative other than zero; and at least a second screw portion having a second law of continuous variation of the pitches of the screw, which can be graphically represented by a second function having in at least one stretch a first derivative other than zero. The first law of continuous variation of the pitches is different from the second law of continuous variation of the pitches.

Abstract: An apparatus for actuating a valve. The apparatus comprises: an actuator device comprising a piston contained in a cylinder; the actuator device being actuated by a pressurized fluid, in particular compressed air; an opening/closing mechanism of a valve actuated by the actuator device; and a valve device to control and check the flow of pressurized fluid from and toward the actuator device in order to open/close the valve. The valve device is fixed to a front face of the actuator device on the side of the opening/closing mechanism of the valve.

Abstract: A multi-blade dosing valve comprising the following elements: a valve body provided with a central opening; a plurality of shafts, each provided with a respective blade, which extend transversely to the central opening; the blades being able to close, at least partially, the central opening; a motor unit which causes the opening/closing of the blades; and vibrators to set in vibration the shafts and the blades. The multi-blade dosing valve comprises an independent vibrator for each shaft.

Abstract: An aeration apparatus to ease the emptying of a mass of powdered material from any kind of container. The apparatus comprises a vibrating membrane coupled to a device for pulling and fastening it to the container wall, so that said membrane adheres to the inner surface of the container wall. The apparatus is characterized in that the inner surface of membrane has a number of grooves shaped as radial recesses formed only on the lower half of the inner surface of the membrane itself. Each radial section of any radial recess is advantageously venturi-shaped.

Abstract: A slide valve for a powdered material or a material with a small grain size. The valve comprises a stiff frame, which defines a discharge mouth to discharge the material, and a shutter of the discharge mouth, which is activated by respective moving organs. The valve is characterized in that it comprises a height adjusting device for a sealing element. The height adjusting device is suited to compensate the loss of sealing effect between the lower face of the sealing element and an upper surface of the shutter. The loss of sealing power is due to the wear generated by the relative friction between the lower face and the surface.

Abstract: A feeding device for feeding a separation apparatus, the separation apparatus being suitable for separating aggregates from concrete residues in order to reclaim said aggregates, comprises: a tank for containing a fluid comprising a liquid in which the aggregates to be reclaimed are dispersed; a main screw conveyor for collecting said fluid from a collecting zone of the tank and conveying the liquid and the aggregates contained in said fluid towards the separation apparatus; at least one auxiliary screw conveyor positioned along a bottom surface of the tank for conveying the fluid towards said collecting zone.

Abstract: An apparatus for actuating a valve. The apparatus comprises: an actuator device comprising a piston contained in a cylinder; the actuator device being actuated by a pressurised fluid, in particular compressed air; an opening/closing mechanism of a valve actuated by the actuator device; and a valve device to control and check the flow of pressurised fluid from and toward the actuator device in order to open/close the valve. The valve device is fixed to a front face of the actuator device on the side of the opening/closing mechanism of the valve.

Abstract: A vertical separator for the treatment of slurry. The vertical separator comprises: a screen device, with a vertical axis, provided with a screen; a feeding device, provided with a pump, to feed the slurry to a screen device; a discharge device for the liquid part; and a discharge device for the solid particles. The screen device houses a counter-pressing device (e.g. a screw, which is designed to generate a reaction, which partially counters the pushing action exerted by the pump upon the slurry.

Abstract: An Archimedes screw plant for separating slurry includes a tubular sifting device; a slurry feeding device; a device for evacuating the liquid fraction; and a device for evacuating the substantially dry separated solid. The device includes an upper compaction chamber of the separated solid where a solid plug of product is formed. In addition, the tubular sifting device has an upper opening being provided with an auxiliary contrast element for forming the solid plug of product.

Abstract: A dosing apparatus (1) for dosing powdery, granular or flaked substances, comprises: a containment chamber (30) for receiving said substance; an homogenizing device (20) arranged internally of the containment chamber (30) and rotatable about an axis (Y) for homogenizing said substance; a dosing device (10) rotatable about a further axis (X) for conveying metered quantities of said substance outwardly the containment chamber (30); positioning means (50) for positioning the dosing apparatus (1) with respect to a support structure in an operative configuration. Said further axis (X) is offset with respect to said axis (Y), so that, in said operative configuration, a vertical plane (P) containing said axis (Y) is passing outside of the dosing device (10).

Abstract: A pressure relief valve for containers suited for the pneumatic loading of loose solid products, in particular silos. The valve comprises a valve body having a first end, which pneumatically communicates with the inside of the container, and a second end, which is associated to a flow control organ, which is subject to the action of corresponding closing membrane. The flow control organ periodically establishes a fluid communication between said valve body and a duct that communicates with the outside. The valve is characterized in that at least one portion of the duct that communicates with the outside is suited to be elastically deformed by the pressure difference existing between the inside of said container and the inside of the duct itself.

Abstract: A wastewater treatment plant. The plant comprises separating equipment for separating the solid particles from the liquid part. The separating equipment comprises, in turn, an inlet opening and an outlet opening, which are substantially arranged in line along a common directrix. In the fluid mass, there is present at least one fluid-dynamic profile, which is suited to help the detachment of the solid particles from the liquid part. The plant is characterized in that the separating equipment comprises, furthermore, a second fluid-dynamic profile. The two fluid-dynamic profiles define between one another a first preferential flow channel of the liquid mass.

Abstract: A loading apparatus of a silo includes a pneumatic filling circuit connecting the silo to a tanker for transporting a granular or powdery material and a filtering device suitable to filter the compressed transport gas coming out of the silo. A recovery device of at least part of the energy contained in the compressed transport gas of the granular or powdery material is arranged between the tanker and the silo.

Abstract: An aeration apparatus to ease the emptying of a mass of powdered material from any kind of container. The apparatus comprises a vibrating membrane coupled to a device for pulling and fastening it to the container wall, so that said membrane adheres to the inner surface of the container wall. The apparatus is characterized in that the inner surface of membrane has a number of grooves shaped as radial recesses formed only on the lower half of the inner surface of the membrane itself. Each radial section of any radial recess is advantageously venturi-shaped.