A method and apparatus for producing a curved tubular segment includes obtaining a curved external tubular element and a curved internal tubular element. The curved internal tubular element is made of a material having a resistance to wear greater than that of the curved external tubular element and has a cross section such as to cover at least part of the internal surface of the curved external tubular element. The curved internal tubular element is inserted inside the curved external tubular element after heating the latter by a heating unit. To form the curved external tubular element on the exact geometry of the curved internal tubular element, a molding unit and a cooling unit are used to obtain a curved tubular segment without spaces between the curved external tubular element and the curved internal tubular element.

A plenum of distributing a flow of air from an air source includes ports extending from a face element of a body. The ports are configured to direct the flow of air out of the plenum, and the ports are arranged on the face element in a first row having first length, a second row having a second length, and a third row having a third length. The first row is positioned proximate to the top element, the third row is positioned proximate to the bottom element, and the second row is positioned between the first row and the third row. In addition, the second length is greater than the first length and the third length, and a shape of the face element is configured to accommodate the first length of the first row, the second length of the second row, and the third length of the third row.

A transportable and combustible gaseous suspension includes solid fuel particles suspended in a gaseous carrier. The solid fuel particles have a sufficiently small particle size so that they remain suspended during transportation. The gaseous carrier may include reactive and inert gases. The solid fuel particles may include coal-derived solid carbonaceous matter. Other examples of solid fuel particles include biomass, refined bioproducts, and combustible polymer particles. The combustible gaseous suspension can be tailored to have an energy density at atmospheric pressure which is comparable to conventional gaseous hydrocarbon fuels. The gaseous combustible fuel may be pressurized to a pressure in the range from 2 to 100 atmospheres.

An improved air handing system for a particulate metering system is provided. The system includes a flow path with an inlet in communication with an intake and an outlet in communication with one or more discharge points. A blower can be in communication with the flow path at the intake and provide an air flow to the flow path. The system can include a plenum within the flow path and in fluid communication with the blower. A plurality of ports can be disposed on the plenum and within the flow path. Each of the ports can be in communication with a discharge point. The system can further include air flow directing members within the flow path. Each of the air flow directing members can be in communication with a separate one of the ports and one of the discharge points.

When performing a method for pneumatically conveying plastic pellets, the plastic pellets are conveyed, by means of a carrier gas, through a conveyor line from a feed point to a destination with a liquid being added thereto, wherein the quantity of liquid added to the plastic pellets and/or the carrier gas is such that during conveying, the carrier gas is oversaturated with the liquid at least in sections of the conveyor line in such a way that a Froude number defining the conveying conditions in the conveyor line is smaller than 45 at any point along the conveyor line.

Aspects and embodiments of systems for fluid transportation using inductive heating are described. In one embodiment, the system includes a first transportation pipe having a first diameter and a second transportation pipe having a second diameter. The first diameter is greater than the second diameter. An augur that causes a fluid flow is within the first transportation pipe. A control circuit is electrically coupled to the first inductive element and the second inductive element, and to a power supply to inductively heat the first transportation pipe and the second transportation pipe.

Method for compensating a change in volume caused by a pressure difference of the intermediate container of an input point of a pneumatic pipe collection system for material and/or for preventing undesired material displacement from the intermediate container. In the method a bypass channel is arranged in the channel section formed by the intermediate container of an input point for compensating a change in volume resulting from the pressure difference of the pressures of different magnitudes possibly acting on different sides of the material and/or for preventing undesired material displacement from the channel section into the material conveying pipe. The invention also relates to an apparatus and to a wastes conveying system.

Process and device for pneumatically conveying a powdery material comprising the steps of Pneumatically conveying a powdery material in a pneumatic conveying pipeline (first) and into said recipient by a flow generated by a blower, A powdery material dosing step, A fluctuation step of pressure drop in said pneumatic conveying pipeline or up to said recipient,
wherein a sonic device generates sonic waves inside said pneumatic conveying pipeline or up to said recipient and provides a counteraction on the fluctuation step of the pressure drop in said pneumatic conveying pipeline or up to said recipient.

Provided is a powder conveying system configured to prevent moisture adsorption to powder during powder conveyance. The powder conveying system comprises: a conveying path, a conveying device wherein the conveying device is a part of the conveying path or is connected with the conveying path; a measuring device wherein the measuring device is a part of the conveying path or is connected with the conveying path; a controlling device wherein the controlling device is a part of the conveying path or is connected with the conveying path; and a judging device wherein the judging device is connected with the measuring device and the controlling device.

A loading head (1, 30) of a pneumatic loading system for the uniform introduction of bulk material (49) into the inner space of container sections (45), wherein the loading head (1, 30) is arranged on the free end of a loading tube (12, 73), the outlet connector (7) of which has an outlet opening (10) which is directed toward a distribution head (13, 43) for the lateral deflection of the bulk material into the container section (45), which has an approximately conical deflection surface (15), wherein the distribution head (13, 43) is fastened at least in the direction of the longitudinal extension (X direction) of the container section (45) so that it can be shifted and locked on the loading head (1, 30).